Environmental chamber high-low temperature refrigerating system and environmental chamber

Abstract

The utility model discloses an environmental chamber high and low temperature refrigerating system and an environmental chamber, which comprise a high temperature refrigerating system and a low temperature refrigerating system which are connected through a plate heat exchanger, and also comprise a dehumidification pipeline, a second evaporator and a refrigerating pipeline, one end of the dehumidification pipeline is connected with the high-temperature refrigerating system, the other end of the dehumidification pipeline is connected to a dehumidification calandria in the cabin body, and a first thermostatic expansion valve and a first electromagnetic valve are arranged on the dehumidification pipeline. According to the utility model, by isolating the operation of the low-temperature refrigeration system during the high-temperature test, unnecessary energy consumption is greatly reduced, and the test cost is reduced. The access mode of the dehumidifier is changed, so that the dehumidifier is ensured not to work in a low-temperature test and to work normally in a high-temperature test. By means of the optimization, energy consumption is reduced, and meanwhile the humidity control effect of the test environment is improved. By adding a plurality of refrigeration pipelines and control elements, the technical scheme can realize accurate control of the refrigeration effect, and improves the accuracy and reliability of the test.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental experiment chambers, in particular to a high and low temperature refrigeration system of an environmental chamber and an environmental chamber. Background Art

[0002] An environmental chamber is a device used to simulate and test products working under various environmental conditions. In the high and low temperature test of the environmental chamber, accurately simulating different temperature environments is crucial to testing the performance of the product. Especially in the aerospace, automotive, electronics and other industries, products need to be tested for performance under extreme temperature conditions to ensure their reliability and stability in actual use. Therefore, the refrigeration system of the high and low temperature chamber needs to be efficient, stable and energy-saving.

[0003] At present, high and low temperature chambers generally use cascade refrigeration systems, such as Figure 2 As shown in the figure, this system realizes simulation of a wide temperature range by connecting two refrigeration systems in series. During high temperature testing, the high temperature refrigeration system cools the low temperature refrigeration system, and the low temperature refrigeration system cools the cabin. However, this design has the following problems: in high temperature tests above 0°C, since the temperature control part is in the low temperature system, even if the high temperature system does not need to work, the low temperature system must require the high temperature system to start to cool itself down. This leads to a large amount of unnecessary energy consumption, increases the test cost, and does not meet the current environmental protection requirements of energy conservation and emission reduction. During high temperature testing, the dehumidifier can work effectively according to the humidity requirements, further improving the energy saving effect. The control of the refrigeration effect is not precise enough, and the refrigeration capacity cannot be flexibly adjusted according to the test requirements, which affects the accuracy and reliability of the test. Utility Model Content

[0004] According to an embodiment of the utility model, in order to solve the above-mentioned deficiencies in the prior art, a high and low temperature refrigeration system for an environmental cabin is provided, including a high-temperature refrigeration system and a low-temperature refrigeration system, the low-temperature refrigeration system including a first evaporator for temperature control of the environmental cabin, the environmental cabin including a cabin body, the high-temperature refrigeration system and the low-temperature refrigeration system are connected through a plate heat exchanger, and further include: a dehumidification pipeline, a second evaporator, and a refrigeration pipeline; one end of the dehumidification pipeline is connected to the high-temperature refrigeration system, and the other end is connected to the dehumidification drain pipe in the cabin body, and a first thermal expansion valve and a first solenoid valve are provided on the dehumidification pipeline; the second evaporator is connected to the high-temperature refrigeration system; the refrigeration pipeline is connected to the second evaporator.

[0005] Preferably, a second thermal expansion valve and a second solenoid valve are provided on the refrigeration pipeline.

[0006] Preferably, a third thermal expansion valve and a third solenoid valve are provided on the pipeline between the low-temperature refrigeration system and the first evaporator.

[0007] Preferably, when the preset temperature of the cabin is above 0°C, the third solenoid valve and the third thermal expansion valve are closed, the first solenoid valve, the first thermal expansion valve, the second solenoid valve and the second thermal expansion valve are opened, the high-temperature refrigeration system works, and the compressor of the low-temperature refrigeration system is isolated.

[0008] Preferably, it also includes: a temperature monitoring device and a humidity monitoring device, which monitor the temperature and humidity in the cabin respectively.

[0009] Preferably, a safety protection device is also included, which monitors the operating status of the system and cuts off the power supply when a fault or abnormal situation occurs.

[0010] Preferably, a heat recovery device is provided between the first evaporator and the second evaporator, and the heat recovery device recovers the heat generated by the second evaporator during the refrigeration process and transfers it to the first evaporator.

[0011] Preferably, the inner material of the plate heat exchanger is titanium alloy or aluminum alloy.

[0012] Preferably, the dehumidification pipeline is a copper tube bare pipe.

[0013] According to the high and low temperature refrigeration system of the environmental chamber of the first embodiment of the utility model, by isolating the operation of the low temperature refrigeration system during high temperature testing, the technical solution can significantly reduce unnecessary energy consumption. In high temperature tests above 0°C, the low temperature refrigeration system no longer needs to be started, thereby achieving significant energy saving effects and reducing test costs, while also meeting environmental protection and energy saving requirements. By changing the access method of the dehumidifier, the technical solution ensures that the dehumidifier does not work during low temperature tests and works normally during high temperature tests. This optimization avoids the operation of the dehumidifier when it is not needed, reduces energy consumption, and also improves the humidity control effect of the test environment. By adding multiple refrigeration pipelines and control elements, the technical solution can achieve precise control of the refrigeration effect. According to the test requirements, the cooling capacity can be flexibly adjusted to ensure that the temperature in the test chamber reaches the preset value, thereby improving the accuracy and reliability of the test.

[0014] And an environmental chamber, including the high and low temperature refrigeration system of the environmental chamber of the first embodiment, the optimized refrigeration system structure is more reasonable, the probability of failure is reduced, and the stability and reliability of the system are improved. At the same time, the precise control of the refrigeration effect also reduces the impact of temperature fluctuations on the test results, further enhancing the credibility of the test. At the same time, the operation is more convenient and flexible. The user can easily adjust the operating state of the refrigeration system according to the test requirements, which improves the efficiency and convenience of the test.

[0015] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the principle of the high and low temperature refrigeration system of the environmental chamber according to the embodiment of the utility model;

[0017] Figure 2 It is a circuit schematic diagram of a high and low temperature refrigeration system of an environmental chamber in the prior art;

[0018] Figure 3 The figure is a circuit diagram of a high and low temperature refrigeration system of an environmental chamber according to an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0020] First, combine Figures 1 to 3 The high and low temperature refrigeration system of the environmental chamber according to the embodiment of the utility model is widely used in material research, biological research, air quality research, etc. In this embodiment, an environmental chamber that needs to sample and detect internal gas is used as an example for description.

[0021] like Figure 1 As shown, the high and low temperature refrigeration system of the environmental cabin of the embodiment of the utility model includes a high temperature refrigeration system and a low temperature refrigeration system. Different from the prior art, the high temperature refrigeration system and the low temperature refrigeration system of the technical solution can work independently or in coordination as needed, thereby improving the applicability and flexibility of the system; the low temperature refrigeration system includes a first evaporator 1, which is used for temperature control of the environmental cabin. The environmental cabin includes a cabin body. The high temperature refrigeration system and the low temperature refrigeration system are connected via a plate heat exchanger 2. The plate heat exchanger 2 can effectively transfer heat, realize heat exchange between the high temperature and low temperature refrigeration systems, and improve the energy efficiency of the system. At the same time, this design also simplifies the system structure and facilitates maintenance and management. It also includes: a dehumidification pipeline 3, a second evaporator 4, and a refrigeration pipeline 5.

[0022] Specifically, Figure 3As shown, one end of the dehumidification pipeline 3 is connected to the high-temperature refrigeration system, and the other end is connected to the dehumidification exhaust pipe in the cabin. The dehumidification pipeline 3 is provided with a first thermal expansion valve 31 and a first solenoid valve 32, so that the system can dehumidify the cabin through the high-temperature refrigeration system when necessary, ensuring that the humidity in the environmental cabin is controlled within an appropriate range. The setting of the thermal expansion valve and the solenoid valve realizes the precise control of the dehumidification process and improves the dehumidification efficiency; the second evaporator 4 is connected to the high-temperature refrigeration system; the refrigeration pipeline 5 is connected to the second evaporator 4, and the addition of the second evaporator 4 enhances the refrigeration capacity of the high-temperature refrigeration system, so that the system can maintain an efficient refrigeration effect at a higher temperature; by isolating the operation of the low-temperature refrigeration system during the high-temperature test, it is ensured that while achieving the refrigeration effect, unnecessary energy consumption can be greatly reduced.

[0023] Preferably, if Figure 3 As shown, the refrigeration pipeline 5 is provided with a second thermal expansion valve 51 and a second solenoid valve 52. The second thermal expansion valve 51 can automatically adjust the flow rate of the refrigerant according to the changes in the superheat degree and refrigeration load at the outlet of the evaporator. This ensures that the evaporator always has an appropriate amount of refrigerant, which can not only meet the refrigeration demand, but also avoid energy efficiency reduction or equipment damage caused by too much or too little refrigerant; at the same time, when the compressor is stopped, it can prevent the refrigerant liquid in the high-pressure part from entering the evaporator, thereby avoiding liquid hammer due to excessive low pressure when the compressor is started next time.

[0024] Preferably, if Figure 3 As shown, a third thermal expansion valve 11 and a third solenoid valve 12 are provided on the pipeline between the low-temperature refrigeration system and the first evaporator 1, which can reduce fluctuations and failures of the system by precisely controlling the flow and pressure, thereby helping to improve the overall stability of the refrigeration system and enable the refrigeration equipment to operate more smoothly and reliably.

[0025] Preferably, when the preset temperature of the cabin is above 0°C, the third solenoid valve 12 and the third thermal expansion valve 11 are closed, the first solenoid valve 32, the first thermal expansion valve 31, the second solenoid valve 52 and the second thermal expansion valve 51 are opened, the high-temperature refrigeration system works, and the compressor of the low-temperature refrigeration system is isolated; when the cabin requires a temperature above 0°C, only the high-temperature refrigeration system is started, avoiding unnecessary operation of the low-temperature refrigeration system, thereby reducing energy consumption and improving refrigeration efficiency. At the same time, the workload of the refrigeration system is reasonably distributed, the wear and aging of the equipment are reduced, and the service life of the refrigeration equipment is extended.

[0026] Preferably, it also includes: a temperature monitoring device 71 and a humidity monitoring device 72, which respectively monitor the temperature and humidity in the cabin, and provide timely feedback to improve the accuracy of the data standard in the cabin.

[0027] Preferably, a safety protection device 8 is also included. The safety protection device 8 monitors the operating status of the system. When a fault or abnormal situation occurs, the safety protection device 8 cuts off the power supply to reduce the probability of risk occurrence.

[0028] Preferably, a heat recovery device 6 is provided between the first evaporator 1 and the second evaporator 4. The heat recovery device 6 recovers the heat generated by the second evaporator 4 during the refrigeration process and transfers it to the first evaporator 1, thereby realizing energy recycling and further reducing energy consumption.

[0029] Preferably, the internal material of the plate heat exchanger 2 is titanium alloy or aluminum alloy. For the plate heat exchanger 2, selecting high-efficiency heat transfer materials is crucial to improving heat exchange efficiency and reducing energy loss. In addition to considering the heat transfer efficiency and corrosion resistance of the material, its cost, processing performance and compatibility with other components also need to be considered. Titanium alloy or aluminum alloy is a cost-effective solution.

[0030] Preferably, the dehumidification pipeline 3 is a copper bare pipe. Considering the dehumidification effect, corrosion resistance and service life, the copper pipe has excellent thermal conductivity and chemical stability, can adapt well to general humidity and corrosive environment, and is easy to process and install.

[0031] When in use, it combines the high-temperature refrigeration system and the low-temperature refrigeration system in the existing technology, and realizes heat exchange by adding a plate heat exchanger, such as Figure 3 As shown, during high temperature testing, the high temperature refrigeration system is mainly relied on to provide refrigeration for the environmental chamber. At this time, by closing the solenoid valve D2-1 and the thermal expansion valve TGES7.5 connected to the low temperature refrigeration system, ensure that the low temperature refrigeration system does not participate in the work. At the same time, open the thermal expansion valve TGES5 and the solenoid valve D1-2 or the thermal expansion valve TGES2 and the solenoid valve D1-3 on the refrigeration pipeline connected to the high temperature refrigeration system, as well as the thermal expansion valve TGES2 and the solenoid valve D1-4 on the dehumidification pipeline. In this way, the high temperature refrigeration system can provide the required refrigeration capacity for the cabin through the refrigeration pipeline, and at the same time, discharge the moisture in the cabin through the dehumidification pipeline to ensure the control of the humidity in the cabin. During low temperature testing, the working principle is the opposite. At this time, it is necessary to close all valves connected to the high temperature refrigeration system, namely the thermal expansion valve TGES5, the solenoid valve D1-2, the thermal expansion valve TGES2, the solenoid valve D1-3 and the solenoid valve D1-4, to ensure that the high temperature refrigeration system does not participate in the work. At the same time, the solenoid valve D2-1 and thermal expansion valve TGES7.5 connected to the low-temperature refrigeration system are opened to enable the low-temperature refrigeration system to provide cooling effect for the cabin; through the rearrangement of the pipelines and the control of the valves, precise control of the temperature and humidity in the cabin is achieved.

[0032] Above, refer to Figures 1 to 3According to the high and low temperature refrigeration system of the environmental chamber of the first embodiment of the utility model, by isolating the operation of the low temperature refrigeration system during high temperature tests, the technical solution can greatly reduce unnecessary energy consumption. In high temperature tests above 0°C, the low temperature refrigeration system no longer needs to be started, thereby achieving significant energy saving effects and reducing test costs, while also meeting the requirements of environmental protection and energy saving. By changing the access method of the dehumidifier, the technical solution ensures that the dehumidifier works normally during low temperature tests and does not work during high temperature tests. This optimization avoids the operation of the dehumidifier when it is not needed, reduces energy consumption, and also improves the humidity control effect of the test environment. By adding multiple refrigeration pipelines and control elements, the technical solution can achieve precise control of the refrigeration effect. According to the test requirements, the cooling capacity can be flexibly adjusted to ensure that the temperature in the test chamber reaches the preset value, thereby improving the accuracy and reliability of the test.

[0033] And an environmental chamber, including the high and low temperature refrigeration system of the environmental chamber of the first embodiment, the optimized refrigeration system structure is more reasonable, the probability of failure is reduced, and the stability and reliability of the system are improved. At the same time, the precise control of the refrigeration effect also reduces the impact of temperature fluctuations on the test results, further enhancing the credibility of the test. At the same time, the operation is more convenient and flexible. The user can easily adjust the operating state of the refrigeration system according to the test requirements, which improves the efficiency and convenience of the test.

[0034] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means two or more than two; the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “top”, and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A high and low temperature refrigeration system for an environmental chamber, comprising a high temperature refrigeration system and a low temperature refrigeration system, wherein the low temperature refrigeration system comprises a first evaporator for temperature control of the environmental chamber, wherein the environmental chamber comprises a chamber body, and wherein: The high-temperature refrigeration system and the low-temperature refrigeration system are connected via a plate heat exchanger, and further include: A dehumidification pipeline, one end of which is connected to the high-temperature refrigeration system, and the other end of which is connected to the dehumidification drain pipe in the cabin, and a first thermal expansion valve and a first solenoid valve are provided on the dehumidification pipeline; a second evaporator, the second evaporator being connected to the low temperature refrigeration system; A refrigeration pipeline is connected to the second evaporator.

2. The high and low temperature refrigeration system of the environmental chamber according to claim 1, characterized in that: The refrigeration pipeline is provided with a second thermal expansion valve and a second solenoid valve.

3. The high and low temperature refrigeration system of the environmental chamber according to claim 2, characterized in that: A third thermal expansion valve and a third solenoid valve are arranged on the pipeline between the low-temperature refrigeration system and the first evaporator.

4. The high and low temperature refrigeration system of the environmental chamber according to claim 3, characterized in that: When the preset temperature of the cabin is above 0°C, the third solenoid valve and the third thermal expansion valve are closed, the first solenoid valve, the first thermal expansion valve, the second solenoid valve and the second thermal expansion valve are opened, the high-temperature refrigeration system works, and the compressor of the low-temperature refrigeration system is isolated.

5. The high and low temperature refrigeration system of the environmental chamber according to claim 1, characterized in that: Also includes: A temperature monitoring device and a humidity monitoring device, wherein the temperature monitoring device and the humidity monitoring device monitor the temperature and humidity in the cabin respectively.

6. The high and low temperature refrigeration system of the environmental chamber according to claim 5, characterized in that: It also includes a safety protection device, which monitors the operating status of the system and cuts off the power supply when a fault or abnormal situation occurs.

7. The high and low temperature refrigeration system of the environmental chamber according to claim 5 or 6, characterized in that: A heat recovery device is provided between the first evaporator and the second evaporator. The heat recovery device recovers the heat generated by the second evaporator during the refrigeration process and transfers it to the first evaporator.

8. The high and low temperature refrigeration system of the environmental chamber according to claim 1, characterized in that: The internal material of the plate heat exchanger is titanium alloy or aluminum alloy.

9. The high and low temperature refrigeration system of the environmental chamber according to claim 1, characterized in that: The dehumidification pipeline is a red copper bare pipe.

10. An environmental chamber, characterized in that: A high and low temperature refrigeration system for an environmental chamber comprising any one of claims 1 to 9.

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