Chinese pump manufacturers are rising at an alarming rate. Although they started later than developed countries in Europe and the United States, with the continuous development of the national economy and the maturity of computer Internet technology, China's pump industry research and development, design, and production are developing rapidly. In addition, Chinese pumps are opening up sales in the international market with "high cost performance", and have become core suppliers in the global industrial field with "technological innovation" and "advantages of the industrial chain".

Ⅰ. Unparalleled cost control capabilities of Chinese pump manufacturers

1. Labor cost advantage: The labor cost of Chinese pump companies is only 1/3 of that of European and American countries. Through additional intelligent equipment transformation, the production cost of a single pump is reduced by more than 40%.

2. Industrial belt advantage: Chinese pump manufacturers basically produce in the form of industrial belts. In Jingxian, where Anhui Changyu Pumps and Valves is located, a complete industrial chain from casting processing to assembly testing has been formed, and the supporting efficiency has been increased by 50%.

3. Large-scale production advantages: large production capacity, scale effect makes the price of products of the same specifications 30%-50% lower than that of international brands.

Ⅱ. Policy dividends boost industrial upgrading

Under China's national strategic "dual carbon" goal, high-efficiency and energy-saving pumps are included in the procurement priority list, which indirectly promotes the rapid development of Chinese pump companies and enables Chinese pump manufacturers to continuously develop and innovate to meet market procurement needs. In 1995, the China National Pump Standardization Technical Committee was formally established, and a series of design and manufacturing standards for industrial and civil pumps were published. The standardization management of product design and manufacturing, and Chinese pump manufacturers have since used the standard system to align with the international standards. More than 90% of products have passed international certifications such as CE, UL, and API, and their export compliance is leading the world.

Ⅲ. Technological innovation achieves overtaking

1: Intelligence: With the penetration of AI intelligence, the Internet of Things, and big data, Chinese chemical pump manufacturers are rapidly adopting digital technology to improve the quality of their products and services. Connecting sensors and controllers through the Internet of Things (IoT) can achieve real-time monitoring and production optimization, realize automatic diagnosis and equipment safety functions, reduce downtime, and improve asset utilization. ‌

‌2: High efficiency‌: High-efficiency energy-saving pump equipment, nuclear main pumps, cryogenic submersible pumps, mixed-transmission booster pumps and other key equipment with high import dependence have become key investment areas in the industry. Under the government's call, Chinese chemical pump companies can significantly reduce energy consumption and improve equipment production efficiency by using energy-saving motors and inverters. New innovative materials and designs also contribute to the high efficiency of pumps. For example, the pump impeller with aerodynamic design can reduce the resistance and noise of the pump and increase the displacement. ‌

‌3‌: New materials‌: The application of high-performance engineering plastics solves the problems of high cost and heavy weight of traditional materials such as stainless steel, alloys, and ceramics. These new materials not only improve the performance of the pump, but also reduce the production cost, with superior performance and durability.

Ⅳ. Global service network builds competitiveness

1. Localized operation system: Many Chinese pump companies choose to build factories around the world to achieve 72-hour emergency order delivery, and even set up overseas warehouses to shorten the supply time of accessories to 48 hours

2. Customized solutions. Due to strong technical support, Chinese pump manufacturers can customize and develop solutions to industrial pumping needs according to local actual working conditions, realize customized solutions, and serve global industrial enterprises more professionally

Ⅴ. Domestic substitution accelerates the penetration of high-end markets

At present, the development of the global industrial pump market shows a sustained and stable trend. Industrial pump companies occupy an important position in the global market, mainly dominated by pump companies in Europe, the United States and Japan, and their technological advantages and technological leadership have not changed fundamentally.

At the same time, in China, there are more than 6,000 Chinese pump manufacturing companies across the country, of which more than 1,200 are above scale. These enterprises are growing steadily, improving their market competitiveness through technological innovation and product upgrades, increasing their total exports, and gradually narrowing the gap between their technical standards and those of developed countries, thus gradually accelerating their penetration into the global high-end market.

From "cost advantage" to "technological leadership", from "domestic substitution" to "global leadership", China's pump industry is completing a gorgeous transformation from "manufacturing" to "intelligent manufacturing". Choosing Chinese pumps is not only choosing cost-effective industrial equipment, but also choosing an innovative ecosystem that is synchronized with the world's top technologies.

In the complex and demanding world of chemical processing, chemical pumps are the workhorses that keep operations flowing. Among the various types of chemical pumps, the Chemical centrifugal pump, acid centrifugal pump, acid transfer pump, and chemical magnetic pump each have their unique characteristics and applications. However, they are also prone to a range of issues during daily operation that can disrupt production and pose safety risks.

1. Flow and Pressure Anomalies

The Chemical centrifugal pump, widely used for its high flow rate capabilities, may experience a decrease in flow. This could be due to a clogged suction line. In a chemical plant environment, solid particles, sediments, or even chemical precipitates can accumulate and block the inlet. For example, in a process where a Chemical centrifugal pump is handling a solution with suspended solids, over time, these solids can build up and reduce the effective cross-sectional area of the suction pipe, impeding the fluid's entry into the pump. Similarly, an acid centrifugal pump dealing with corrosive acids might face flow issues if the acid reacts with impurities in the system, forming deposits that clog the pump internals.

Low pressure output is another common problem. If the impeller of a Chemical centrifugal pump is damaged or worn, it cannot impart sufficient energy to the fluid, resulting in a lower pressure head. In the case of an acid transfer pump, a leak in the discharge line can cause a drop in pressure. Even a small crack or loose connection in the piping downstream of the pump can lead to a significant reduction in the pressure available to transport the acid to the desired location.

2. Corrosion and Material Degradation

Acid centrifugal pumps and acid transfer pumps are constantly exposed to corrosive acids. The materials of construction, although selected for their acid resistance, can still degrade over time. For instance, if the wrong grade of stainless steel is used in an acid centrifugal pump, it may start to corrode, leading to pitting and weakening of the pump casing and impeller. Chemical magnetic pumps, which often have components made of non-metallic materials to handle corrosive fluids, can also face issues. The magnetic drive coupling, which is a critical part of the chemical magnetic pump, can be affected by corrosive vapors or liquids seeping into the coupling area. This can cause the magnetic coupling to lose its efficiency or even fail completely, disrupting the pump's operation.

3. Seal Failures

Seals are essential in chemical pumps to prevent leaks and maintain the integrity of the pumping system. In acid transfer pumps and acid centrifugal pumps, the mechanical seals are under constant stress due to the corrosive nature of the fluids. The seal faces can be eroded or chemically attacked, leading to leaks. If the seal is not properly installed or maintained, the chances of failure increase. For chemical magnetic pumps, the seals around the magnetic drive also need to be carefully maintained. A leak in the seal of a chemical magnetic pump can not only cause a loss of fluid but also affect the magnetic coupling's performance, as the presence of leaked fluid in the coupling area can disrupt the magnetic field and lead to a decrease in pumping efficiency.

4. Cavitation

Cavitation is a serious issue that can affect all types of chemical pumps. In a Chemical centrifugal pump, when the local pressure at the impeller inlet drops below the vapor pressure of the liquid being pumped, vapor bubbles form. These bubbles then collapse in the higher pressure regions of the pump, creating shock waves that can damage the impeller and other internal components. For acid centrifugal pumps and acid transfer pumps, the corrosive nature of the fluid can make the damage caused by cavitation even more severe. Cavitation can be caused by factors such as a restricted suction line, operating the pump at too high a speed, or a significant change in the fluid's temperature or pressure.

5. Vibration and Noise

Excessive vibration and noise in chemical pumps can indicate underlying problems. An unbalanced impeller in a Chemical centrifugal pump can cause vibration. This could be due to manufacturing defects, wear and tear, or the accumulation of deposits on the impeller. In acid transfer pumps and acid centrifugal pumps, the corrosive environment can also contribute to the degradation of bearings and other moving parts, leading to increased vibration. Chemical magnetic pumps may experience vibration if the magnetic coupling is misaligned or if there is a problem with the rotor balance. High levels of vibration not only reduce the lifespan of the pump but can also cause damage to the piping and other connected equipment.

6. Electrical and Motor Problems

The motors driving chemical pumps can encounter various issues. Overheating of the motor in a Chemical centrifugal pump can occur due to excessive load, poor ventilation, or a malfunctioning cooling system. If the motor bearings fail, it can lead to increased friction and heat generation, potentially causing the motor to seize. In the case of chemical magnetic pumps, problems with the electrical supply to the magnetic coupling can disrupt the pump's operation. An electrical short in the wiring or a malfunctioning controller can prevent the magnetic coupling from working properly, rendering the pump inoperative.

In conclusion, the proper operation of Chemical centrifugal pumps, acid centrifugal pumps, acid transfer pumps, and chemical magnetic pumps is crucial for the smooth running of chemical processes. Understanding the potential problems that can occur during daily operation and implementing preventive maintenance measures, such as regular inspections, proper material selection, and correct installation and operation procedures, can help to minimize downtime, increase the lifespan of the pumps, and ensure the safety and efficiency of chemical production.

Anhui Changyu Pump & Valve Co., Ltd. is located in the Pump & Valve Industrial Park of Jingxian County, Xuancheng City, Anhui Province. The fluoroplastic lined pumps produced in our park occupy about 70% of the market share in China. In recent years, they have been widely recognized by customers all over the country and overseas. The following are the main reasons why fluoroplastic lined centrifugal pumps are popular in the market:

1. Excellent corrosion resistance

1) Excellent material properties

Fluoroplastics (such as PTFE, FEP, PFA) have extremely strong corrosion resistance and can withstand almost all strong acids (such as sulfuric acid, hydrochloric acid, nitric acid) and strong alkalis (such as sodium hydroxide, sodium hypochlorite, etc.), as well as a variety of organic solvents and oxidizing media.

Even in high temperature or high concentration media environment, fluorine-lined materials can maintain their chemical stability to ensure that the pump body is not corroded.

2) Adapt to complex media

It can effectively deal with mixed media (acid-base mixtures), strong oxidizing media (such as aqua regia, chlorine), volatile chemicals (such as mercury vapor, dichloromethane, methanol), etc., and has a wide range of applications.

In the transportation of corrosive liquids, the corrosion resistance of fluorine-lined plastics is better than that of ordinary stainless steel and alloy materials, and it is an ideal choice for handling highly corrosive chemicals.

2. High cost performance and economic benefits

1) Replace expensive metal pumps

Compared with pumps made of expensive materials such as titanium alloy and Hastelloy, fluoroplastic lined centrifugal pumps are cheaper but can provide similar corrosion resistance.

For many small and medium-sized enterprises, fluoroplastic lined pumps are an economical and efficient solution.

2) Long life and low maintenance cost

Fluorine-lined materials are not only corrosion-resistant, but also wear-resistant, which extends the service life of the pump.

The pump body has a simple structure and is easy to maintain, reducing downtime and maintenance costs.

3. Advanced design and reliable performance

1) No leakage and high safety

Fluoroplastic lined centrifugal pumps are usually equipped with mechanical seals or magnetic drive designs to greatly reduce the risk of leakage, such as our UHB series fluoroplastic mortar pumps from Changyu Pumps and Valves.

Suitable for conveying flammable, explosive, highly toxic or corrosive liquids to ensure the safety of operators and the environment.

2) Excellent structural design

Fluoroplastic-lined and pump body substrates are closely combined, which can withstand high-intensity mechanical stress and resist chemical erosion of the medium.

The high-efficiency hydraulic design makes the pump run more smoothly and reduces energy consumption.

4. Wide range of application scenarios

1) Chemical industry

Transports a variety of corrosive media such as strong acids, strong alkalis, and organic solvents.

Applied to processes such as pickling and electroplating liquid circulation.

2) Environmental protection industry

Used for acid-base adjustment and waste liquid transportation in wastewater treatment.

Deal with the safe discharge of highly corrosive waste liquid.

3) Pharmaceutical industry

Transports high-purity, highly corrosive chemicals to ensure the quality and safety of drug production.

4) Metallurgical industry

Transports ore slurry pickling liquid and extraction liquid to solve the corrosive problem in metal processing.

5. Drivers of market demand growth

1) Promotion of environmental regulations

Strict environmental regulations and special working conditions require reducing leakage and pollution, and the leakage-free characteristics of fluoroplastic lined pumps fit this trend.

2) Rapid development of the chemical industry

The increasing demand for corrosion-resistant and high-efficiency pump equipment in the chemical industry has further promoted the market share of fluoroplastic lined pumps.

3) Continuous technological innovation

The improvement of fluoroplastic lined materials and pump body structure has continuously improved product performance and adapted to more complex working conditions. It has extremely high compatibility with other pump parts (such as sealing, gaskets and bearings) and can be flexibly configured in the face of different transport media.

Contact us:

If you are looking for a fluoroplastic lined centrifugal pump suitable for your working conditions, please consult us and we will provide you with a tailor-made solution.

Lab-companion, whom we committed to delivering high-quality environmental testing equipment that serves the diverse needs of various industries. As industry leaders, we offer a range of products that ensure reliable testing and quality assurance for your operations.

Our thermal chambers can operate within a temperature range of 0°C to + 200°C and a humidity range of 5% to 98% RH. These chambers provide stable, long-term test conditions, making them compliant with the ICH Q1A guideline and ideal for a multitude of applications.

Learn more about thermal chambers below and how they can help ensure longevity and reliability for all your testing needs.

WHAT ARE TEMPERATURE CHAMBERS?

Temperature Chambers, often interchangeably referred to as Thermal Chambers, are specialized enclosures designed to create controlled thermal environments.

These chambers enable precise temperature simulations ranging from extreme cold to elevated heat to provide a stable setting where researchers can test products or materials for their resilience, durability, and overall performance.

The role of temperature chambers is pivotal in research and development phases across industries. Temperature chambers subject a product to various thermal conditions it is likely to encounter in the real world.

This simulative testing is essential to quality assurance processes, ensuring that products meet the safety and performance standards required.

By replicating various temperature scenarios, temperature chambers allow manufacturers and researchers to identify potential design flaws early, thus saving both time and resources in the long run.

HOW DO THERMAL CHAMBERS WORK?

A thermal chamber is a complex assembly of various components that create a controlled thermal environment. At its core are heating and cooling systems that can generate the required temperatures. These systems often use electric heaters for heating and a combination of compressors and refrigerants for cooling.

Insulation is critical to maintaining the chamber’s internal environment. Specialized materials help ensure that temperature changes are well-contained. Airflow management is also key; fans and ducts circulate the air to create uniform conditions throughout the chamber.

The “brains” of a thermal chamber are its controls and sensors. These are responsible for monitoring the temperature and ensuring it remains within set parameters.

Many thermal chambers utilize PID (Proportional-Integral-Derivative) controllers to maintain temperature accuracy. PID controllers continuously calculate the difference between the desired and current temperatures, making real-time adjustments to the heating and cooling systems to keep the temperature within a predefined range.

All these components come together to power a system that can simulate a wide range of temperature conditions, making thermal chambers invaluable tools in product development and quality assurance processes.

TEMPERATURE CHAMBERS: INDUSTRIES AND APPLICATIONS

Temperature or thermal chambers are versatile tools that find applications across numerous industries. Their role in simulating various temperature conditions makes them indispensable for research, development, and quality assurance.

• AUTOMOTIVE INDUSTRY

In the automotive sector, thermal chambers test components like engines, batteries, and HVAC systems. These tests help manufacturers ensure that vehicles can withstand extreme weather conditions, be it the cold of a frigid winter or the heat of a scorching desert.

• ELECTRONICS INDUSTRY

For electronics, thermal chambers help ensure that devices like smartphones, laptops, and other gadgets operate effectively across various temperatures. For example, humidity condition tests are crucial for consumer satisfaction and safety, ensuring that devices won’t fail when exposed to extreme conditions.

• MEDICAL/PHARMACEUTICAL INDUSTRY

In the medical and pharmaceutical sectors, thermal chambers are essential for testing the stability and shelf-life of drugs and the reliability of medical devices. From vaccines to pacemakers, stability testing ensures these critical products operate safely and efficiently.

• AEROSPACE INDUSTRY

The aerospace sector often utilizes thermal chambers to test components that will endure extreme conditions in space or high-altitude flight. Aerospace manufacturers must test everything from materials used in aircraft bodies to the electronics in satellite systems to ensure resilience, reliability, and safety.

TYPES OF TESTS CONDUCTED IN THERMAL CHAMBERS

Thermal chambers are highly versatile and capable of performing an array of tests that simulate different environmental conditions. Some of the most common tests include:

• Thermal Cycling: This test exposes the subject to various temperatures, oscillating between cold and hot conditions, to assess its resilience and pinpoint any potential weaknesses.
• Thermal Shock: Here, the product is subjected to abrupt temperature changes to evaluate its ability to withstand sudden temperature fluctuations, a frequent cause of failure for numerous devices.
• High-Temperature Testing: This test assesses the subject’s ability to function in extremely high temperatures, often for extended periods.
• Low-Temperature Testing: This test evaluates how well a product can function at cold temperatures, often freezing or below.
• Temperature Humidity Testing: This test combines both temperature and humidity variables. While thermal chambers mainly focus on temperature conditions, they can often incorporate humidity settings to some extent. This is where they differ from humidity chambers, which primarily control moisture levels.

If you’re looking for a chamber that controls temperature and humidity, Lab-companion offers specialized chambers that provide the best of both worlds.

EXPLORE LAB-COMPANION’S TEMPERATURE CHAMBERS

When it comes to reliability and efficiency, our product catalog stands out for several compelling reasons:

• Accelerated Testing: With advanced heating and cooling systems, our chambers are designed for rapid temperature cycling, allowing for quicker test completion without compromising the accuracy of results.
• Reliable Results: The chambers are equipped with cutting-edge sensors and controls, ensuring that you receive consistent and reliable data throughout the testing process.
• Cost-Efficiency: Investing in a high-quality temperature chamber like those offered by us can significantly reduce long-term testing costs. Their durability and low maintenance requirements make them a cost-effective choice for any organization.
• Customizable Settings: Lab-companion offers a high degree of customization, allowing you to tailor the testing environment according to the specific needs of your product, further enhancing the accuracy of your tests.

Understanding the ins and outs of temperature chambers is essential for anyone involved in product development, research, or quality assurance across various industries.

These chambers play a crucial role in simulating different environmental conditions, enabling organizations to rigorously test their products for safety, reliability, and durability. From automotive and electronics to aerospace and pharmaceuticals, the applications are as diverse as they are crucial.

If you’re looking to elevate your testing processes, you can’t afford to overlook the value of a top-tier temperature chamber.

Contact us at the bottom of the page for more information.

Some companies equip their refrigeration systems with a wide array of components, ensuring that every part mentioned in textbooks is included. However, is it truly necessary to install all these components? Does installing all of them always bring benefits? Let's analyze this matter and share some insights with fellow enthusiasts. Whether these insights are correct or not is open to interpretation.

Oil Separator

An oil separator allows most of the compressor lubricating oil carried out from the compressor discharge port to return. A small portion of the oil must circulate through the system before it can return with the refrigerant to the compressor suction port. If the system's oil return is not smooth, oil can gradually accumulate in the system, leading to reduced heat exchange efficiency and compressor oil starvation. Conversely, for refrigerants like R404a, which have limited solubility in oil, an oil separator can increase the saturation of oil in the refrigerant. For large systems, where the piping is generally wider and oil return is more efficient, and the oil volume is larger, an oil separator is quite suitable. However, for small systems, the key to oil return lies in the smoothness of the oil path, making the oil separator less effective.

Liquid Accumulator

A liquid accumulator prevents uncondensed refrigerant from entering or minimally entering the circulation system, thereby improving heat exchange efficiency. However, it also leads to increased refrigerant charge and lower condensation pressure. For small systems with limited circulation flow, the goal of liquid accumulation can often be achieved through improved piping processes.

Evaporator Pressure Regulating Valve

An evaporator pressure regulating valve is typically used in dehumidification systems to control the evaporation temperature and prevent frost formation on the evaporator. However, in single-stage circulation systems, using an evaporator pressure regulating valve requires the installation of a refrigeration return solenoid valve, complicating the piping structure and hindering system fluidity. Currently, most test chambers do not include an evaporator pressure regulating valve.

Heat Exchanger

A heat exchanger offers three benefits: it can subcool the condensed refrigerant, reducing premature vaporization in the piping; it can fully vaporize the return refrigerant, reducing the risk of liquid slugging; and it can enhance system efficiency. However, the inclusion of a heat exchanger complicates the system's piping. If the piping is not arranged with careful craftsmanship, it can increase pipe losses, making it less suitable for companies producing in small batches.

Check Valve

In systems used for multiple circulation branches, a check valve is installed at the return port of inactive branches to prevent refrigerant from flowing back and accumulating in the inactive space. If the accumulation is in gaseous form, it does not affect system operation; the main concern is preventing liquid accumulation. Therefore, not all branches require a check valve.

Suction Accumulator

For refrigeration systems in environmental testing equipment with variable operating conditions, a suction accumulator is an effective means to avoid liquid slugging and can also help regulate refrigeration capacity. However, a suction accumulator also interrupts the system's oil return, necessitating the installation of an oil separator. For units with Tecumseh fully enclosed compressors, the suction port has an adequate buffer space that provides some vaporization, allowing the omission of a suction accumulator. For units with limited installation space, a hot bypass can be set up to vaporize excess return liquid.

Cooling Capacity PID Control

Cooling capacity PID control is notably effective in operational energy savings. Moreover, in thermal balance mode, where temperature field indicators are relatively poor around room temperature (approximately 20°C), systems with cooling capacity PID control can achieve ideal indicators. It also performs well in constant temperature and humidity control, making it a leading technology in refrigeration systems for environmental testing products. Cooling capacity PID control comes in two types: time proportion and opening proportion. Time proportion controls the on-off ratio of the refrigeration solenoid valve within a time cycle, while opening proportion controls the conduction amount of the electronic expansion valve.

However, in time proportion control, the lifespan of the solenoid valve is a bottleneck. Currently, the best solenoid valves on the market have an estimated lifespan of only 3-5 years, so it's necessary to calculate whether the maintenance costs are lower than the energy savings. In opening proportion control, electronic expansion valves are currently expensive and not easily available on the market. Being a dynamic balance, they also face lifespan issues.

To achieve the desired test conditions in a constant temperature and humidity test chamber, it is inevitable to perform humidification and dehumidification operations. This article analyzes the various methods commonly used in Labcompanion constant temperature and humidity test chambers, highlighting their respective advantages, disadvantages, and recommended conditions for use.

Humidity can be expressed in many ways. For test equipment, relative humidity is the most commonly used concept. Relative humidity is defined as the ratio of the partial pressure of water vapor in the air to the saturation vapor pressure of water at the same temperature, expressed as a percentage.

From the properties of water vapor saturation pressure, it is known that the saturation pressure of water vapor is solely a function of temperature and is independent of the air pressure in which the water vapor exists. Through extensive experimentation and data organization, the relationship between water vapor saturation pressure and temperature has been established. Among these, the Goff-Gratch equation is widely adopted in engineering and metrology and is currently used by meteorological departments to compile humidity reference tables.

Humidification Process

Humidification essentially involves increasing the partial pressure of water vapor. The earliest method of humidification was to spray water onto the chamber walls, controlling the water temperature to regulate the surface saturation pressure. The water on the chamber walls forms a large surface area, through which water vapor diffuses into the chamber, increasing the relative humidity inside. This method emerged in the 1950s.

At that time, humidity control was primarily achieved using mercury contact conductivity meters for simple on-off regulation. However, this method was poorly suited for controlling the temperature of large, lag-prone water tanks, resulting in long transition processes that could not meet the demands of alternating humidity tests requiring rapid humidification. More importantly, spraying water onto the chamber walls inevitably led to water droplets falling on the test samples, causing varying degrees of contamination. Additionally, this method posed certain requirements for drainage within the chamber.

This method was soon replaced by steam humidification and shallow water pan humidification. However, it still has some advantages. Although the control transition process is lengthy, the humidity fluctuations are minimal once the system stabilizes, making it suitable for constant humidity tests. Furthermore, during the humidification process, the water vapor does not overheat, thus avoiding the addition of extra heat to the system. Additionally, when the spray water temperature is controlled to be lower than the required test temperature, the spray water can act as a dehumidifier.

Development of Humidification Methods

With the evolution of humidity testing from constant humidity to alternating humidity, there arose a need for faster humidification response capabilities. Spray humidification could no longer meet these demands, leading to the widespread adoption and development of steam humidification and shallow water pan humidification methods.

Steam Humidification

Steam humidification involves injecting steam directly into the test chamber. This method offers rapid response times and precise control over humidity levels, making it ideal for alternating humidity tests. However, it requires a reliable steam source and can introduce additional heat into the system, which may need to be compensated for in temperature-sensitive tests.

Shallow Water Pan Humidification

Shallow water pan humidification uses a heated water pan to evaporate water into the chamber. This method provides a stable and consistent humidity level and is relatively simple to implement. However, it may have slower response times compared to steam humidification and requires regular maintenance to prevent scaling and contamination.

Dehumidification Process

Dehumidification is the process of reducing the partial pressure of water vapor in the chamber. This can be achieved through cooling, adsorption, or condensation methods. Cooling dehumidification involves lowering the temperature of the chamber to condense water vapor, which is then removed. Adsorption dehumidification uses desiccants to absorb moisture from the air, while condensation dehumidification relies on cooling coils to condense and remove water vapor.

Conclusion

In summary, the choice of humidification and dehumidification methods in constant temperature and humidity test chambers depends on the specific requirements of the tests being conducted. While older methods like spray humidification have their advantages, modern techniques such as steam humidification and shallow water pan humidification offer greater control and faster response times, making them more suitable for advanced testing needs. Understanding the principles and trade-offs of each method is crucial for optimizing test chamber performance and ensuring accurate and reliable results.

Rechargeable battery, which can be re-active by charging after be used. They are widely used in the fields of environmentally friendly vehicles, power storage, and Dynamic field.

Environmental testing of rechargeable battery is an important means of evaluating their performance under different environmental conditions.

Ⅰ.  Testing Purpose

The environmental testing of rechargeable battery aims to simulate various conditions that may be encountered in actual usage environments to evaluate the reliability and performance of the battery. Through testing, it is possible to understand the conditions of working battery under different temperature, humidity, vibration, impact and other conditions, providing scientific basis for the research and development, production and use of battery.

Ⅱ.  Testing content

A. Temperature testing

a. High temperature test: Rich a high temperature environment to observe its temperature stability and the risk of thermal runaway.

b. Low temperature testing: Testing the discharge performance, capacity degradation, and low-temperature starting ability of the battery under low temperature conditions.

c. Temperature cycling test: Simulate the temperature changes that the battery may experience in actual use, evaluate its thermal durability and cycle life.

B. Humidity test: Evaluate the battery’s performance, sealing, and corrosion resistance in a humid environments.

C. Vibration testing: Through simulate the battery in the vibration environment that may encounter during transportation, installation, and use, evaluate its structural integrity, electrical connection reliability, and performance stability.

D. Impact testing: Through simulating the battery in unexpected situations such as drops and collisions, and evaluate their impact resistance.

E. External short circuit test: Test the performance of the battery under external short circuit conditions, including risks of thermal runaway and explosion and so on.

Ⅲ. Test standards and specifications

The environmental testing of rechargeable battery should follow relevant testing standards and specifications to ensure the accuracy and comparability of test results. Common testing standards include:

IEC 62133/ IEC 61960、UN 38.3、UL 1642/UL 2580、GB/T 31467、JIS C 8714

Ⅳ. Test equipment

Environmental testing on rechargeable battery requires the professional testing equipment and methods. Common testing equipment includes：

High and low temperature test chamber: Used to simulate different temperature environments.

Humidity test chamber: used to evaluate the performance of battery in humid environments.

Vibration test bench: Simulate vibration environment to evaluate the structural integrity and performance stability of battery.

Impact testing machine: used to simulate impacts in unexpected situations such as drops and collisions.

Ⅴ. Test results and evaluation

After completing the test, it is necessary to analyze and evaluate the test results. Based on test data and standard requirements, determine whether the performance of the battery meets the requirements under different environmental conditions. For undesirable battery, further analysis and corresponding improvement measures should be taken.

In summary, environmental testing of rechargeable battery is an important means to ensure their stable and reliable performance in practical use. Professional testing instruments can provide more professional, safe, scientific and effective experimental results for rechargeable battery testing, greatly reducing the cost of testing and bringing convenience to companies.

Click to check related products.

https://www.lab-companion.com/thermal-shock-test-chamber

https://www.lab-companion.com/temperature-and-humidity-chamber

https://www.lab-companion.com/rapid-temperature-cycling-test-chamber

The High-Low Temperature and Low Pressure Test Chamber is an experimental instrument for simulating the storage, operation, and transportation reliability on high-altitude, plateau areas climates in the national defense industry, aerospace industry automation components, automotive components, electronic and electrical components, plastics, chemical industry, food industry, pharmaceutical industry, and related products under the single or simultaneous action of high/low temperature and low pressure. It can also conduct electrical performance parameters on test specimens when powered on at the same time.

The High-Low Temperature and Low Pressure Test Chamber can perform high temperature, low temperature, altitude (not higher than 30000 meters or 45000 meters above sea level), high/low temperature cycle tests, and temperature altitude comprehensive tests on products (whole machine), components, and materials. During high and low temperature tests, this chamber can be used for testing heat dissipation samples and non heat dissipation samples. For the heat dissipation sample, its heat dissipation power cannot exceed the cooling capacity of the chamber, as the cooling capacity is a dynamic value that varies with temperature points.

Main materials of our equipment:

Adopting a bipolar rotary vane vacuum pump with high ultimate vacuum degree - ensuring efficient and stable operation of the equipment throughout its entire working range;

High strength and high reliability structural design - ensuring the high reliability of the equipment;

The inside chamber material is SUS304 stainless steel - with strong corrosion resistance, cold and hot fatigue function, long service life;

High density polyurethane foam insulation material - ensuring minimal heat loss;

Surface spraying treatment - ensuring the long-lasting anti-corrosion function and appearance life of the equipment;

High strength heat-resistant silicone rubber sealing strip - ensures high sealing performance of equipment doors;

Multiple optional functions (such as test holes, recorders, water purification systems, etc.) - ensuring users have multiple functions and testing needs;

Large area electric anti frost observation window and concealed lighting - providing good observation effect;

Environmentally friendly refrigerants - ensure that equipment better meets your environmental protection requirements;

*Customizable size/usage indicators/various optional features according to your requirements.

Main functions of our equipment:

Temperature control: It can achieve temperature constant control and program control;

The full process data recorder (optional function) can achieve full process recording and traceability of the experimental process;

Each motor is equipped with overcurrent (overheating) protection/heater short-circuit protection to ensure high reliability of air flow and heating during equipment operation;

USB interface and Ethernet communication function enable the device's communication and software expansion functions to meet various customer needs;

Adopting the internationally popular cooling control mode, the compressor cooling power can be automatically adjusted from 0% to 100%, reducing energy consumption by 30% compared to the traditional heating balance temperature control mode;

The key components of refrigeration and electrical control are all made of internationally renowned brand products, which improves and ensures the overall quality of the equipment.

The Solar Simulation Irradiation Test Chamber, also known as the "sunlight radiation protection test device," is categorized into three types based on test standards and methods: air-cooled xenon lamp (LP/SN-500), water-cooled xenon lamp (LP/SN-500), and benchtop xenon lamp (TXE). The differences among them lie in test temperature, humidity, accuracy, duration, etc. It is an indispensable testing instrument in the series of aging test chambers.

The test chamber utilizes an artificial light source combined with G7 OUTDOOR filters to adjust the system's light source, simulating the radiation found in natural sunlight, thereby meeting the requirements for solar simulators as stipulated in IEC 61646. This system light source is employed to conduct light aging tests on solar cell modules in accordance with IEC 61646 standards. During the testing, the temperature on the back of the modules must be maintained at a constant level between 50±10°C. The chamber is equipped with automatic temperature monitoring capabilities and a radiometer to control the light irradiance, ensuring it remains stable at the specified intensity, while also controlling the duration of the test.

Within the solar simulation irradiation test chamber, the period of ultraviolet (UV) light cycling typically shows that photochemical reactions are not sensitive to temperature. However, the rate of any subsequent reactions is highly dependent on the temperature level. These reaction rates increase as the temperature rises. Therefore, it is crucial to control the temperature during UV exposure. Additionally, it is essential to ensure that the temperature used in accelerated aging tests matches the highest temperature that materials would experience when directly exposed to sunlight. In the solar simulation irradiation test chamber, the UV exposure temperature can be set at any point between 50°C and 80°C, depending on the irradiance and ambient temperature. The UV exposure temperature is regulated by a sensitive temperature controller and a blower system, which ensures excellent temperature uniformity within the test chamber.

This sophisticated control over temperature and irradiance not only enhances the accuracy and reliability of the aging tests but also ensures that the results are consistent with real-world conditions, through this Solar Simulation Irradiation Test Chamber, which can provide valuable data for the development and improvement of solar cell technologies.

This product is designed for the fluorescent ultraviolet (UV) lamp method in laboratory light source exposure testing of various materials. It is primarily used to evaluate the changes in materials when exposed to outdoor conditions, as well as for durability testing of new material formulations and products.

This UV Aging Test Chamber utilizes fluorescent UV lamps that optimally simulate the UV spectrum of sunlight. Combined with temperature and humidity control devices, it replicates the effects of sunlight (UV spectrum), high temperature, high humidity, condensation, and dark cycles, which cause material damage such as discoloration, loss of brightness, reduced strength, cracking, peeling, chalking, and oxidation. Additionally, the synergistic effect of UV light and moisture weakens or nullifies the material's resistance to light or moisture, making it widely applicable for assessing the weather resistance of materials. This test chamber offers the best simulation of sunlight's UV spectrum, low maintenance and operational costs, ease of use, and high automation with programmable controllers for automatic test cycle operation. It also features excellent lamp stability and high reproducibility of test results.

The humidity system consists of a water tank and a humidification system. Through the mechanism of moisture condensation, the exposed surface of the sample is wetted, simulating rain, high humidity, and condensation, which, in conjunction with UV light and dark cycles, creates an optimal testing environment. The chamber is equipped with safety protection systems, including water shortage prevention, dry burn protection, over-temperature protection, short-circuit protection, and overload protection, located on the electrical control panel and inside the electrical control cabinet. Upon entering an alarm state, the equipment automatically cuts off the power to the working system, halts operation, and emits an audible alert to ensure the safety of both the equipment and the operator.