Rapid temperature change circulation box

Rapid temperature change circulation boxApplication fields:

Electronic appliances: testing the performance stability of chips, PCB boards, etc. under sudden temperature changes (such as the adaptability of mobile phones and computers from cold to warm environments).

Automotive industry: Verify the weather resistance and fatigue strength of components such as batteries and rubber seals.

Aerospace: Simulate the reliability of aircraft components under rapid temperature changes to ensure safe operation.

Materials research: Analyze the changes in thermal expansion coefficient and mechanical properties of materials such as metals and plastics.

Technical Specifications:

All equipment of Beijing Pusanda Instrument Technology Co., Ltd. has undergone strict quality inspection before leaving the factory. You can use it with confidence. If you have any difficulties or problems, please notify the agent or directly notify our company. The components selected for this equipment have high reliability, excellent quality, and can ensure the reliability, stability, and accuracy of various product performance.

Warranty period: Two years of warranty from the date of acceptance (except for damages caused by natural disasters, abnormal electricity, improper use, and improper maintenance, our company provides free repairs). For services beyond the warranty period, only corresponding cost fees will be charged.

Any problems that occur during the use of the equipment should be responded to within 30 minutes, and maintenance engineers and technicians should be promptly dispatched within 24 hours to handle and solve the problem.

Box material:

The equipment casing is made of stainless steel or A3 steel plate and processed by machine tools. It is easy to clean, resistant to aging, and has the characteristics of durability, wear resistance, and corrosion resistance.

The inner liner is made of high-quality SUS304, 8k mirror stainless steel plate, which is bright, beautiful, and corrosion-resistant.

Insulation material: high-density aluminum silicate fiber cotton. Aluminum silicate cotton has the characteristics of high temperature resistance and low heat transfer coefficient compared to similar glass fiber cotton. The insulation thickness is 100mm to ensure that the temperature inside the test room will not be transmitted to the outside of the equipment, making the test temperature more accurate.

Install an observation window at the center of the test chamber door to observe changes in the indoor sample. The observation window is made of three-layer hollow tempered glass and double layered laminated conductive film on the inside and outside, which has the advantages of transparency, heat insulation, and is not prone to steam frosting. It is equipped with high-quality lighting, which can assist in observing the test situation inside the test chamber when the light is insufficient.

A double-layer high tensile silicone sealing strip that is resistant to high and low temperatures is used between the test chamber door and the box body to ensure the sealing of the testing area. The main door plate is made of stainless steel, which is beautiful, durable, and uses a non reactive door handle, making it easier to operate, durable, and not easily damaged.

The lead test hole (on the left side of the machine) can be used for external testing of power or signal lines (with a diameter of 50mm, one is standard, and if the aperture and number of holes need to be increased, they can be requested at the time of ordering).

High quality fixed PU movable wheels are installed at the bottom of the machine, which can easily move the machine and fix the casters.

Standard configuration:

(1) Test hole one

(2) One observation window

(2) Two layers of storage rack

Freezing system:

Compressor: Original French Taikang fully enclosed compressor (cascade refrigeration).

Cooling method: air-cooled condenser.

Evaporator: fin type automatic load capacity adjustment.

Expansion system: an automatic capacity controlled refrigeration system.

Refrigerant: Adopting environmentally friendly (HFC) with zero ozone coefficient. DuPont refrigerant R404A from the United States.

Heating system: finned heat dissipation tube shaped nickel chromium alloy electric heating method

Supply air circulation system:

Motor: One set

Stainless steel extended axis

Fan: Aluminum multi blade fan (SIROCCO FAN)

Stainless steel adjustable wet grille, (adjustable up and down, left and right 120 degrees)

Control system: 7-inch LCD digital display programmable touch screen controller.

Controller specifications:

Accuracy: Temperature ± 0.1 ℃+1 digit

Resolution: Temperature ± 0.01

Temperature slope: adjustable from 0.1 to 9.9

Equipped with upper and lower limit standby and alarm functions

Temperature input force signal PT100

Screen display function:

Direct display of temperature setting (SV) and actual (PV) values

Can display the current program execution number, segment number, remaining time, and number of cycles

Accumulated operation time function

Has a separate program editing screen.

The screen display protection function can be set to timer, TIMER, or manually turned off

Program capacity and control functions:

Available program groups: A total of 120 PATTEN

Available memory capacity: 1200 SEGMENT in total

Repeatable command execution

SEGMENT time setting: 0-99Hour59Min

Equipped with power-off program memory, it automatically starts and continues to execute program functions after power restoration

Equipped with RS-232 communication interface and dedicated testing software (optional accessories)

Real time display of graphical curves during program execution

It has the function of scheduled startup and shutdown

Has date and time adjustment function

Rapid temperature change circulation boxWorking Principle:

(1) Refrigeration principle: using air-cooled piston compression cascade refrigeration method; The refrigeration method adopts vapor compression refrigeration, which utilizes the latent heat of evaporation of liquids such as Freon to absorb heat from the cooled object and achieve refrigeration. In the process of vapor compression refrigeration cycle, the liquid entering the evaporator through expansion valve or capillary tube throttling absorbs the latent heat of evaporation from surrounding objects and evaporates. After evaporation, it becomes a low-temperature and low-pressure gas that is sucked in by the refrigeration compressor. After compression by the compressor, it becomes a high-temperature and high-pressure gas that enters the condenser, where it is cooled into a high-pressure liquid, and then enters the evaporator through expansion valve or capillary tube. This cycle repeats, absorbing heat from low temperature to achieve refrigeration, and releasing heat from high temperature.

(2) The heating principle is much simpler compared to the refrigeration system, mainly composed of high-power resistance wires. Due to the high heating rate required for the rapid temperature change test chamber (usually requiring a rise of 5 ℃/min), the heating system power of the rapid temperature change test chamber is relatively high.

Test objective: To generate thermal stress and strain in the product through temperature cycling, expose potential defects (such as material defects and process issues), verify the product's environmental adaptability in actual use, and avoid the risk of failure caused by temperature changes.