Rapid cooling device for temperature chamber

Abstract

This application provides a rapid cooling device for a temperature chamber, comprising: a temperature chamber body; a first cooling assembly, the first cooling assembly including a compressor and a condenser disposed outside the temperature chamber body and connected by a first pipe, and an evaporator disposed in an air duct area inside the temperature chamber body; the compressor's inlet is connected to a second pipe for introducing refrigerant into it, the condensate outlet of the condenser is connected to the evaporator's liquid inlet through a third pipe, and the evaporator's outlet is connected to the second pipe through a fourth pipe, the third pipe being equipped with an expansion valve; and a second cooling assembly, the second cooling assembly including a nitrogen supply pipe and a liquid nitrogen storage tank; one end of the nitrogen supply pipe is connected to the top of the temperature chamber body, and the other end is connected to the liquid nitrogen storage tank. This application uses a combination of a compressor and liquid nitrogen to simultaneously cool the temperature chamber body, enabling a rapid decrease in the temperature inside the temperature chamber body, thereby improving the cooling efficiency of the temperature chamber body.

Description

Technical Field

[0001] This application relates to the field of temperature chamber technology, and in particular to a rapid cooling device suitable for temperature chambers. Background Technology

[0002] A temperature chamber is a device used to maintain a specific temperature environment. It is mainly used to simulate the working conditions of products under different temperature environments, such as high temperature testing, low temperature testing, high and low temperature alternating cycle testing, temperature shock testing, and constant temperature testing. The purpose is to evaluate the adaptability, reliability, and stability of components under extreme temperature conditions. It can be widely used in laboratories, industrial testing, food storage, materials science, and other fields.

[0003] However, to simulate the working conditions of products under different temperature environments and test their adaptability, reliability, and stability under extreme temperature conditions, cooling is an essential part of the testing process. This is especially true during low-temperature testing, high-low temperature alternating cycle testing, and temperature shock testing, where the temperature inside the chamber needs to be reduced to a set value. Temperature chambers typically use blowers or centrifugal fans to extract heat or employ water or air cooling to exchange heat and achieve cooling. However, these methods require a long cooling time, reducing the testing efficiency of the temperature chamber. Therefore, this application proposes a rapid cooling device suitable for temperature chambers. Utility Model Content

[0004] This application provides a rapid cooling device suitable for temperature chambers to solve the technical problems described in the background art.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0006] This application provides a rapid cooling device suitable for temperature chambers, comprising:

[0007] Temperature chamber body;

[0008] The first cooling component includes a compressor and a condenser disposed outside the temperature chamber body and connected by a first pipe, and an evaporator disposed in the air duct area inside the temperature chamber body; the air inlet of the compressor is connected to a second pipe for introducing a refrigerant therein, the condensate outlet of the condenser is connected to the liquid inlet of the evaporator through a third pipe, the air outlet of the evaporator is connected to the second pipe through a fourth pipe, and an expansion valve is provided on the third pipe;

[0009] The second cooling component includes a nitrogen supply pipe and a liquid nitrogen storage tank; one end of the nitrogen supply pipe is connected to the top of the temperature chamber body, and the other end is connected to the liquid nitrogen storage tank.

[0010] Optionally, a controller is located on the side wall of the temperature chamber body;

[0011] The temperature chamber is equipped with a temperature sensor electrically connected to the controller, the nitrogen supply pipe is equipped with a first solenoid valve electrically connected to the controller, and the compressor is electrically connected to the controller.

[0012] Optionally, the temperature chamber body is also provided with a pressure sensor electrically connected to the controller, and a pressure relief pipe is connected to it. A second solenoid valve electrically connected to the controller is provided on the pressure relief pipe.

[0013] Optionally, the evaporator is serpentine and adapted to the air duct area of ​​the temperature chamber body;

[0014] The evaporator is made of copper.

[0015] Optionally, a plurality of heat dissipation fins are evenly arranged on the outer wall of the evaporator;

[0016] All of the aforementioned heat dissipation fins are made of aluminum.

[0017] Optionally, there are multiple nitrogen supply pipes, and the multiple nitrogen supply pipes are evenly connected to the top of the temperature chamber body;

[0018] There are multiple liquid nitrogen storage tanks, and each of the multiple liquid nitrogen storage tanks corresponds to one of the multiple nitrogen supply pipes.

[0019] Optionally, multiple liquid nitrogen storage tanks are mounted on a support base, and the upper surface of the support base is provided with multiple fixing grooves. Each of the multiple fixing grooves corresponds to one of the multiple liquid nitrogen storage tanks and is used to fix the bottom of the corresponding liquid nitrogen storage tank.

[0020] Optionally, the lower surface of the support base is provided with a lockable caster wheel, and a push-pull rod is provided on one side of it.

[0021] Optionally, the temperature chamber body is provided with a door and a viewing window on each of its two side walls.

[0022] The rapid cooling device for a temperature chamber provided in this application compresses a refrigerant (a low-temperature, low-pressure refrigerant gas) entering the chamber via a compressor in the first cooling component. This refrigerant is then compressed into a high-temperature, high-pressure gas through a second pipe. The high-temperature, high-pressure gas enters a condenser and is condensed into a high-pressure condensate. This condensate then enters an expansion valve through a third pipe, where it is rapidly depressurized to obtain a low-pressure condensate. The low-pressure condensate then enters an evaporator through the third pipe, where it exchanges heat with the temperature chamber body and vaporizes into a low-temperature, low-pressure gas. This low-temperature, low-pressure gas is then recycled through the evaporator's outlet and a fourth pipe back into the second pipe. This process achieves primary cooling of the temperature chamber body. Simultaneously, liquid nitrogen from a liquid nitrogen storage tank is introduced into the temperature chamber body from the top through a nitrogen supply pipe. Since the temperature of liquid nitrogen is -193°C, and low-temperature gases diffuse downwards, the liquid nitrogen directly contacts and exchanges heat with the temperature chamber body as it diffuses from the top to the bottom, thus achieving secondary cooling of the temperature chamber body. Because the compressor uses a refrigerant with a high coefficient of performance and the liquid nitrogen has a low temperature and comes into direct contact with the heat inside the temperature chamber, compared to existing methods that use blowers or centrifugal fans to extract heat or use water or air cooling to exchange heat in the temperature chamber, this application uses a combination of compressor and liquid nitrogen to cool the temperature chamber simultaneously, which can rapidly reduce the temperature inside the temperature chamber, thereby improving the cooling efficiency of the temperature chamber. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of a rapid cooling device for a temperature chamber provided in an embodiment of this application;

[0025] Figure 2 A schematic diagram of a rapid cooling device for a temperature chamber provided in another embodiment of this application;

[0026] Figure 3 A schematic diagram of a first cooling component is provided in one embodiment of this application;

[0027] Figure 4 A schematic diagram of a support base with a fixing groove provided in an embodiment of this application;

[0028] Figure 5A schematic diagram of a temperature sensor, a pressure sensor, a first solenoid valve, and a second solenoid valve electrically connected to a controller is provided in one embodiment of this application.

[0029] The components are as follows: 100, Temperature chamber body; 101, Controller; 102, Temperature sensor; 103, Pressure sensor; 104, Pressure relief pipe; 1041, Second solenoid valve; 105, Chamber door; 106, Visual observation window; 200, First cooling component; 201, Compressor; 202, Condenser; 203, Evaporator; 301, First pipe; 302, Second pipe; 303, Third pipe; 3031, Expansion valve; 304, Fourth pipe; 400, Second cooling component; 401, Nitrogen supply pipe; 4011, First solenoid valve; 402, Liquid nitrogen storage tank; 500, Support base; 501, Fixing groove; 502, Casters; 503, Push-pull rod. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0031] refer to Figures 1 to 5 The application provides a rapid cooling device suitable for temperature chambers, comprising:

[0032] Temperature chamber body 100; wherein, the temperature chamber body 100 may be, for example, a temperature test chamber of model F-62-CHV-50C, but is not limited to the above-mentioned model of temperature test chamber.

[0033] The first cooling component 200 includes a compressor 201 and a condenser 202 disposed outside the temperature chamber body 100 and connected by a first pipe 301, and an evaporator 203 disposed in the air duct area inside the temperature chamber body 100. The air inlet of the compressor 201 is connected to a second pipe 301 for introducing refrigerant into it. The condensate outlet of the condenser 202 is connected to the liquid inlet of the evaporator 203 through a third pipe 303. The air outlet of the evaporator 203 is connected to the second pipe 301 through a fourth pipe 304. An expansion valve 3031 is provided on the third pipe 303. The refrigerant is a low-temperature and low-pressure refrigerant gas, such as R23 (HFC-23) or R32 (HFC-32). Specifically, a refrigerant gas with a high coefficient of performance and environmental friendliness can be selected, but this application does not specifically limit it. In addition, the temperature chamber body 100 also includes a test area, and the air duct area is connected to the test area. The air duct area is usually located behind the test area, depending on the specific type, specifications and model of the temperature chamber body 100.

[0034] The second cooling component 400 includes a nitrogen supply pipe 401 and a liquid nitrogen storage tank 402. One end of the nitrogen supply pipe 401 is connected to the top of the temperature chamber body 100, and the other end is connected to the liquid nitrogen storage tank 402. The nitrogen supply pipe 401 is sealed to both the temperature chamber body 100 and the liquid nitrogen storage tank 402.

[0035] The rapid cooling device for a temperature chamber provided in this application compresses a refrigerant (a low-temperature, low-pressure refrigerant gas) entering the first cooling component 200 through a compressor 201 into a high-temperature, high-pressure gas via a second pipe 301. The high-temperature, high-pressure gas then enters a condenser 202 and is condensed into a high-pressure condensate. The high-pressure condensate then enters an expansion valve 3031 via a third pipe 303 and is rapidly depressurized by the expansion valve 3031 to obtain a low-pressure condensate. The low-pressure condensate then enters an evaporator 203 via the third pipe 303 and exchanges heat with the temperature chamber body 100, subsequently vaporizing into a low-temperature, low-pressure gas. The low-temperature, low-pressure gas then enters the second pipe 301 via the outlet of the evaporator 203 and a fourth pipe 304 for recycling. This process achieves one cooling of the temperature chamber body 100. Simultaneously, liquid nitrogen from the liquid nitrogen storage tank 402 is introduced into the temperature chamber body 100 from the top through the nitrogen supply pipe 401. Since the temperature of the liquid nitrogen is -193℃, and as the liquid nitrogen flows from top to bottom within the temperature chamber body 100, the amount and rate of liquid nitrogen added are controlled by detecting the temperature inside the temperature chamber body 100. This ensures that the liquid nitrogen entering the temperature chamber body 100 is rapidly vaporized upon contact with the high temperature inside the temperature chamber body 100. The liquid nitrogen is converted into a gas to minimize its impact on the components inside the temperature chamber 100. By monitoring the pressure inside the temperature chamber 100, when the pressure is high, the liquid nitrogen is released to expel the vaporized gas from the temperature chamber 100. This means that as the liquid nitrogen diffuses from the top to the bottom of the temperature chamber 100, it directly contacts and exchanges heat with the heat inside the temperature chamber 100, thus achieving secondary cooling. Because the compressor 201 uses a refrigerant with a high coefficient of performance (COP) and the liquid nitrogen has a low temperature and directly contacts the heat inside the temperature chamber 100, compared to existing methods that use blowers or centrifugal fans to extract heat or water or air cooling for heat exchange, this application uses a combination of compressor 201 and liquid nitrogen to simultaneously cool the temperature chamber 100, resulting in a rapid decrease in temperature and improved cooling efficiency.

[0036] In some embodiments, reference Figure 2 and Figure 5 The temperature chamber body 100 in this application has a controller 101 on its side wall. The controller 101 has wide applications in various fields and is used to receive input signals, process and generate control signals to control the controlled object. The specifications and model of the controller 101 can be set according to the actual situation, and this application does not impose specific limitations on it.

[0037] In addition, a temperature sensor 102 electrically connected to the controller 101 is installed inside the temperature chamber body 100, and a first solenoid valve 4011 electrically connected to the controller 101 is installed on the nitrogen supply pipe 401. The compressor 201 is electrically connected to the controller 101. The specifications and models of the temperature sensor 102 and the first solenoid valve 4011 can be selected according to the actual situation, and this application does not impose specific limitations on them.

[0038] In the above embodiment, the controller 101 sets the test temperature of the temperature chamber body 100 and opens the first solenoid valve 4011 and the compressor 201. The temperature sensor 102 detects the temperature inside the temperature chamber body 100. When the detected temperature is close to the test temperature of the temperature chamber body 100, the controller 101 receives this temperature signal and simultaneously controls and closes the first solenoid valve 4011 and the compressor 201, thereby achieving precise control of the temperature inside the temperature chamber body 100.

[0039] In some embodiments, reference Figure 2 and Figure 5 In this application, the temperature chamber body 100 is further equipped with a pressure sensor 103 electrically connected to the controller 101, and a pressure relief pipe 104 is connected to the pressure sensor 103. A second solenoid valve 1041 electrically connected to the controller 101 is installed on the pressure relief pipe 104. The specifications and models of the pressure sensor 103 and the second solenoid valve 1041 can be selected according to the actual situation, and this application does not impose specific limitations on them.

[0040] In the above embodiments, the controller 101 sets the pressure threshold that the temperature chamber body 100 can withstand. The pressure sensor 103 detects the pressure inside the temperature chamber body 100. When the detected pressure approaches the pressure threshold of the temperature chamber body 100, the controller 101 receives this pressure signal and simultaneously controls and opens the second solenoid valve 1041 on the pressure relief pipe 104 until the pressure inside the temperature chamber body 100 is less than the pressure threshold. Then, the controller 101 closes the second solenoid valve 1041. This achieves precise control of the pressure inside the temperature chamber body 100, avoiding the risk of the temperature chamber body 100 bursting due to high pressure caused by introducing liquid nitrogen into the temperature chamber body 100. This improves the safety of the cooling process of the temperature chamber body 100.

[0041] In some embodiments, reference Figure 3In this application, the evaporator 203 is serpentine and adapted to the air duct area of ​​the temperature chamber body 100. This allows the evaporator 203 to be evenly arranged in the air duct area of ​​the temperature chamber body 100, and increases the contact area between the evaporator 203 and the heat inside the temperature chamber body 100. This improves the heat exchange efficiency between the low-pressure condensate in the evaporator 203 and the heat inside the temperature chamber body 100, allowing the temperature inside the temperature chamber body 100 to drop rapidly, thereby improving the cooling efficiency inside the temperature chamber body 100.

[0042] Furthermore, the evaporator 203 is made of copper. Copper is an excellent thermal conductor, capable of rapidly transferring heat from the temperature chamber body 100 to the evaporator 203. This allows the low-pressure condensate within the evaporator 203 to vaporize, absorbing heat from the temperature chamber body 100 and becoming low-temperature, low-pressure, thus rapidly reducing the temperature within the temperature chamber body 100. Additionally, copper's excellent thermal conductivity ensures uniform heating of the low-pressure condensate within the evaporator 203, thereby improving the evaporation efficiency of the low-pressure condensate and reducing the risk of localized overheating.

[0043] In some embodiments, the outer wall of the evaporator 203 in this application is uniformly provided with multiple heat dissipation fins. The heat dissipation fins increase the contact area between the evaporator 203 and the heat in the temperature chamber body 100, thereby enhancing the heat exchange capacity of the evaporator 203. This allows the evaporator 203 to absorb more heat per unit time, achieving efficient heat exchange and improving the cooling efficiency of the temperature chamber body 100. Furthermore, the heat dissipation fins can promote airflow and create turbulence, further improving the heat transfer coefficient of the evaporator 203. Moreover, all the heat dissipation fins are made of aluminum. Aluminum not only has high thermal conductivity, is lightweight, and corrosion-resistant, but is also less expensive than copper. Therefore, using aluminum heat dissipation fins not only improves the heat transfer coefficient of the evaporator but also reduces production costs.

[0044] In some embodiments, reference Figure 1 In this application, there are multiple nitrogen supply pipes 401, which are evenly connected to the top of the temperature chamber body 100. In order to ensure the efficiency and continuity of the cooling process, there are at least two nitrogen supply pipes 401, which can be set according to the actual situation, and this application does not make specific limitations on them.

[0045] Specifically, there are multiple liquid nitrogen storage tanks 402, and each liquid nitrogen storage tank 402 corresponds to a nitrogen supply pipe 401.

[0046] In the above embodiments, on the one hand, in order to rapidly reduce the temperature inside the temperature chamber 100 to the required temperature, liquid nitrogen can be simultaneously introduced into the temperature chamber 100 through multiple nitrogen supply pipes 401. This increases the amount of liquid nitrogen entering the temperature chamber 100 at the same time, enabling it to quickly exchange heat with the heat inside the temperature chamber 100, thereby rapidly reducing the temperature inside the temperature chamber 100 and improving the cooling efficiency of the temperature chamber 100. On the other hand, when the temperature difference of the temperature chamber 100 is small, liquid nitrogen can be introduced into the temperature chamber 100 through a liquid nitrogen storage tank 402. When the temperature inside the temperature chamber 100 has not yet reached the required test temperature and the liquid nitrogen in the liquid nitrogen storage tank 402 is exhausted, the first solenoid valve 4011 on the remaining nitrogen supply pipes 401 can be immediately opened to introduce liquid nitrogen into the temperature chamber 100, thereby ensuring the continuity of the cooling process of the temperature chamber 100.

[0047] In some embodiments, reference Figure 4 In this application, multiple liquid nitrogen storage tanks 402 are mounted on a support base 500. Multiple fixing grooves 501 are provided on the upper surface of the support base 500. The multiple fixing grooves 501 correspond one-to-one with the multiple liquid nitrogen storage tanks 402 and are used to fix the bottom of the corresponding liquid nitrogen storage tanks 402.

[0048] In the above embodiments, the support base 500 facilitates the integration of multiple liquid nitrogen storage tanks 402 together, ensuring the cleanliness of the test process. Furthermore, by moving the support base 500, multiple liquid nitrogen storage tanks 402 can be moved simultaneously, improving the convenience of moving multiple liquid nitrogen storage tanks 402. The fixing groove 501 on the support base 500 facilitates the fixing of the liquid nitrogen storage tank 402 corresponding to the fixing groove 501, improving the stability of the liquid nitrogen storage tank 402 on the support base 500.

[0049] In some embodiments, reference Figure 1 and Figure 4 The lower surface of the support base 500 in this application is provided with a lockable caster wheel 502, and a push-pull rod 503 is provided on one side of it.

[0050] In the above embodiment, the lockable caster wheel 502 is used to unlock or lock the position of the support base 500 relative to the ground of the test workshop. When it is necessary to move the liquid nitrogen storage tank 402, the caster wheel 502 is unlocked and the push-pull rod 503 is used to move the caster wheel 502 on the support base 500 until the liquid nitrogen storage tank 402 is moved to the required position and the caster wheel 502 is locked. This makes the movement of multiple liquid nitrogen storage tanks 402 less strenuous, thereby improving the efficiency and convenience of moving the liquid nitrogen storage tanks 402.

[0051] In some embodiments, reference Figure 1In this application, the temperature chamber body 100 is provided with a door 105 and a viewing window 106 on its two side walls. The door 105 and the viewing window 106 are respectively provided on two adjacent side walls of the temperature chamber body 100.

[0052] In the above embodiment, the chamber door 105 is sealed to the temperature chamber body 100, allowing components to be placed into the temperature chamber body 100 before testing or removed from the temperature chamber body 100 after testing by opening the chamber door 105. Furthermore, the chamber door improves the convenience of maintenance and repair of the interior of the temperature chamber body 100. The viewing window 106 facilitates observation of the components inside the temperature chamber body 100 during the testing process, allowing for better monitoring of the testing status.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rapid cooling device suitable for a temperature chamber, characterized in that, include: Temperature chamber body (100); The first cooling component (200) includes a compressor (201) and a condenser (202) disposed outside the temperature chamber body (100) and connected by a first pipe (301), and an evaporator (203) disposed in the air duct area inside the temperature chamber body (100); the air inlet of the compressor (201) is connected to a second pipe (302) for introducing refrigerant into it, the condensate outlet of the condenser (202) is connected to the liquid inlet of the evaporator (203) through a third pipe (303), the air outlet of the evaporator (203) is connected to the second pipe (302) through a fourth pipe (304), and an expansion valve (3031) is provided on the third pipe (303). The second cooling component (400) includes a nitrogen supply pipe (401) and a liquid nitrogen storage tank (402); one end of the nitrogen supply pipe (401) is connected to the top of the temperature chamber body (100), and the other end is connected to the liquid nitrogen storage tank (402).

2. The rapid cooling device suitable for a temperature chamber according to claim 1, wherein The controller (101) is located on the side wall of the temperature chamber body (100). The temperature chamber body (100) is equipped with a temperature sensor (102) electrically connected to the controller (101), the nitrogen supply pipe (401) is equipped with a first solenoid valve (4011) electrically connected to the controller (101), and the compressor (201) is electrically connected to the controller (101).

3. The rapid cooling device suitable for a temperature chamber according to claim 2, wherein The temperature chamber body (100) is also equipped with a pressure sensor (103) electrically connected to the controller (101), and a pressure relief pipe (104) is connected to it. A second solenoid valve (1041) electrically connected to the controller (101) is provided on the pressure relief pipe (104).

4. The rapid cooling device for a temperature chamber according to claim 1, wherein The evaporator (203) is serpentine and adapted to the air duct area of ​​the temperature chamber body (100); The evaporator (203) is made of copper.

5. The rapid cooling device suitable for a temperature chamber according to claim 4, wherein The outer wall of the evaporator (203) is uniformly provided with multiple heat dissipation fins; All of the aforementioned heat dissipation fins are made of aluminum.

6. The rapid cooling device suitable for a temperature chamber according to claim 2, wherein There are multiple nitrogen supply pipes (401), and the multiple nitrogen supply pipes (401) are evenly connected to the top of the temperature chamber body (100); There are multiple liquid nitrogen storage tanks (402), and each of the multiple liquid nitrogen storage tanks (402) corresponds to one of the multiple nitrogen supply pipes (401).

7. The rapid cooling device suitable for a temperature chamber according to claim 6, wherein Multiple liquid nitrogen storage tanks (402) are mounted on a support base (500). Multiple fixing grooves (501) are provided on the upper surface of the support base (500). Each fixing groove (501) corresponds to one of the multiple liquid nitrogen storage tanks (402) and is used to fix the bottom of the corresponding liquid nitrogen storage tank (402).

8. The rapid cooling device for a temperature chamber according to claim 7, characterized in that, The lower surface of the support base (500) is provided with a lockable caster wheel (502), and a push-pull rod (503) is provided on one side of it.

9. The rapid cooling device for a temperature chamber according to any one of claims 1 to 8, characterized in that, The temperature chamber body (100) is provided with a door (105) and a viewing window (106) on its two side walls respectively.

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