A method and apparatus for controlling temperature and humidity in a test chamber

Abstract

The embodiment of the present application discloses a kind of temperature and humidity control method and device of test chamber.The temperature and humidity of test chamber is adjusted by high-temperature stage compressor and low-temperature stage compressor, and the temperature and humidity control method includes: receiving the operation demand instruction of test chamber;According to operation demand instruction, the temperature and humidity demand of test chamber and the operation demand of preset temperature and humidity curve are determined;According to the temperature and humidity demand of test chamber and the operation demand of preset temperature and humidity curve, the working state of high-temperature stage compressor and low-temperature stage compressor is controlled, to adjust the temperature and humidity of test chamber;When preset temperature and humidity curve runs, high-temperature stage compressor and low-temperature stage compressor are all in working state.The temperature and humidity control method and device of test chamber provided by the embodiment of the present application can improve the reliability of temperature and humidity control.

Description

[0001] This application is a divisional application of application number CN2022111478539, entitled "A method and apparatus for temperature and humidity control of a test chamber". Technical Field

[0002] The embodiments of the present invention relate to temperature and humidity control technology, and more particularly to a method and apparatus for controlling the temperature and humidity of a test chamber. Background Technology

[0003] For devices, products, and equipment with environmental adaptability requirements such as temperature and humidity, temperature and humidity control tests can be conducted in a test chamber to meet factory requirements. Therefore, the temperature and humidity inside the test chamber need to be regulated and controlled to ensure actual testing needs are met.

[0004] Currently, the existing methods for controlling temperature and humidity in test chambers typically use 0℃ as a dividing line. Above 0℃, a high-temperature compressor operates, while below 0℃, a low-temperature compressor operates to regulate the temperature and humidity of the test chamber. This results in uncontrollable temperature and humidity within the chamber during the switching time between different compressors, leading to varying degrees of fluctuations that can easily exceed the required range and affect the reliability of control. Summary of the Invention

[0005] This invention provides a method and apparatus for controlling the temperature and humidity of a test chamber, thereby improving the reliability of temperature and humidity control.

[0006] In a first aspect, embodiments of the present invention provide a method for controlling the temperature and humidity of a test chamber, wherein the temperature and humidity of the test chamber are regulated by a high-temperature compressor and a low-temperature compressor, and the temperature and humidity control method includes:

[0007] Receive the operational requirements instructions from the test chamber;

[0008] Based on the operational requirements instruction, determine the temperature and humidity requirements of the test chamber and the operational requirements of the preset temperature and humidity curve;

[0009] According to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve, the working status of the high-temperature stage compressor and the low-temperature stage compressor are controlled to adjust the temperature and humidity of the test chamber.

[0010] The step of controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes:

[0011] When it is determined that the test chamber has no dehumidification requirement and no cooling requirement, determine whether the temperature of the test chamber is within the preset temperature range;

[0012] If the temperature of the test chamber exceeds the preset temperature range, both the high-temperature compressor and the low-temperature compressor will be controlled to operate, and the valves connected to the high-temperature compressor and the low-temperature compressor will be opened.

[0013] Optionally, controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes:

[0014] When it is determined that the test chamber has no dehumidification requirement and no cooling requirement, determine whether the temperature of the test chamber is within the preset temperature range;

[0015] If the temperature of the test chamber is within the preset temperature range, the high-temperature compressor is controlled to operate, and the valves connected to the high-temperature compressor are controlled to open.

[0016] Optionally, controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes:

[0017] When it is determined that the test chamber does not require dehumidification, and when it is determined that the test chamber requires cooling, both the high-temperature compressor and the low-temperature compressor are controlled to work, and the valves connected to the high-temperature compressor and the low-temperature compressor are controlled to open.

[0018] Optionally, the test chamber further includes a temperature sensor and a temperature and humidity control device. The temperature sensor is installed in the test chamber to collect the temperature. The temperature and humidity control device of the test chamber is electrically connected to the temperature sensor to obtain the temperature of the test chamber. The temperature and humidity control device stores a preset temperature range in advance to determine whether the temperature of the test chamber is within the preset temperature range.

[0019] Optionally, controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes:

[0020] When it is determined that the test chamber has a dehumidification requirement, it is determined whether the test chamber has an operational requirement with a preset temperature and humidity curve;

[0021] When it is determined that the test chamber has a preset temperature and humidity curve operation requirement, both the high-temperature stage compressor and the low-temperature stage compressor are controlled to work, and the valves connected to the high-temperature stage compressor and the low-temperature stage compressor are controlled to open.

[0022] Optionally, controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes:

[0023] When it is determined that the test chamber has a dehumidification requirement, it is determined whether the test chamber has an operational requirement with a preset temperature and humidity curve;

[0024] When it is determined that the test chamber does not require operation based on a preset temperature and humidity curve, the high-temperature stage compressor is controlled to operate, and the valves connected to the high-temperature stage compressor are controlled to open.

[0025] Optionally, the test chamber also includes a drying and dehumidification device for controlling the dew point temperature of the air entering the chamber to below -40°C.

[0026] Secondly, embodiments of the present invention provide a temperature and humidity control device for a test chamber, wherein the temperature and humidity of the test chamber are regulated by a high-temperature compressor and a low-temperature compressor, and the temperature and humidity control device includes:

[0027] The instruction receiving module is used to receive the operation requirements instructions of the test chamber;

[0028] The requirement determination module is used to determine the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve based on the operation requirement instruction.

[0029] The status control module is used to control the working status of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve, so as to adjust the temperature and humidity of the test chamber.

[0030] The state control module includes a range determination unit and a fifth state control unit;

[0031] The range determination unit is used to determine whether the temperature of the test chamber is within a preset temperature range when it is determined that the test chamber has no cooling requirement;

[0032] The fifth state control unit is used to control both the high-temperature compressor and the low-temperature compressor to work if the temperature of the test chamber exceeds the preset temperature range, and to control the valves connected to the high-temperature compressor and the low-temperature compressor to open.

[0033] Optionally, the requirement determination module includes:

[0034] The cooling requirement determination unit is used to determine whether the test chamber has a cooling requirement when it is determined that the test chamber does not have a dehumidification requirement.

[0035] Optionally, the state control module includes:

[0036] The first state control unit is used to control both the high-temperature compressor and the low-temperature compressor to work when it is determined that the test chamber has a preset temperature and humidity curve operation requirement, and to control the opening of the valves connected to the high-temperature compressor and the valves connected to the low-temperature compressor.

[0037] The temperature and humidity control method and apparatus for a test chamber provided in this invention regulate the temperature and humidity of the test chamber using a high-temperature compressor and a low-temperature compressor. The method receives operational demand commands from the test chamber; determines the required temperature and humidity and the operational requirements of a preset temperature and humidity curve based on these commands; and controls the operating states of the high-temperature compressor and the low-temperature compressor according to these requirements to adjust the temperature and humidity of the test chamber. During the operation of the preset temperature and humidity curve, both the high-temperature compressor and the low-temperature compressor are in operation. This method and apparatus, by controlling the operating states of the high-temperature compressor and the low-temperature compressor according to the required temperature and humidity and the operational requirements of the preset temperature and humidity curve, solves the problem of uncontrollable temperature and humidity and varying degrees of temperature and humidity fluctuations during the switching time between different compressors in existing technologies, thereby improving the reliability of temperature and humidity control. Attached Figure Description

[0038] Figure 1 This is a flowchart of a temperature and humidity control method for a test chamber provided in Embodiment 1 of the present invention;

[0039] Figure 2 This is a schematic diagram of the structure of a control system provided in Embodiment 2 of the present invention;

[0040] Figure 3 This is a flowchart of a temperature and humidity control method for a test chamber provided in Embodiment 2 of the present invention;

[0041] Figure 4 This is a flowchart of another method for controlling the temperature and humidity of a test chamber provided in Embodiment 2 of the present invention;

[0042] Figure 5 This is a structural block diagram of a temperature and humidity control device for a test chamber provided in Embodiment 3 of the present invention. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0044] Example 1

[0045] Figure 1 This is a flowchart of a temperature and humidity control method for a test chamber according to Embodiment 1 of the present invention. This embodiment is applicable to temperature and humidity control of test chambers, etc. The method can be executed by a temperature and humidity control device for the test chamber. This device can be implemented in the form of software and / or hardware. The device can be integrated into an electronic device such as a computer that has temperature and humidity control functions for the test chamber. The temperature and humidity of the test chamber are regulated by a high-temperature compressor and a low-temperature compressor. The method specifically includes the following steps:

[0046] Step 110: Receive the test chamber's operation requirements instruction.

[0047] The operating requirements of the test chamber can include temperature and humidity requirements as well as operating requirements for preset temperature and humidity curves.

[0048] Step 120: Determine the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve according to the operation requirements instructions.

[0049] For example, if the operation requirement instruction includes the temperature and humidity requirement instruction of the test chamber, such as the operation requirement instruction of dehumidification and cooling and the preset temperature and humidity curve, then it can be determined that the test chamber has the operation requirement of temperature and humidity requirement and preset temperature and humidity curve.

[0050] Step 130: According to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve, control the working status of the high-temperature compressor and the low-temperature compressor to adjust the temperature and humidity of the test chamber; when the preset temperature and humidity curve is running, both the high-temperature compressor and the low-temperature compressor are in working state.

[0051] For example, Figure 2 This is a schematic diagram of the structure of a control system provided in Embodiment 2 of the present invention. Figure 2 As shown, the high-temperature compressor CM1 and the low-temperature compressor CM2 operate to regulate the temperature and humidity of the test chamber. If the test chamber has temperature and humidity requirements and a preset temperature and humidity curve operation requirement, the temperature and humidity control device (not shown in the figure) controls both the high-temperature compressor CM1 and the low-temperature compressor CM2 to operate, and controls the valves connected to both the high-temperature compressor CM1 and the low-temperature compressor CM2 to be open, ensuring the reliability of the temperature and humidity control of the test chamber.

[0052] The temperature and humidity control method for the test chamber provided in this embodiment regulates the temperature and humidity of the test chamber by a high-temperature compressor and a low-temperature compressor. It receives operational demand commands from the test chamber; determines the required temperature and humidity and the operational requirements of a preset temperature and humidity curve based on these commands; and controls the operating states of the high-temperature compressor and the low-temperature compressor according to these requirements to adjust the temperature and humidity of the test chamber. When the preset temperature and humidity curve is running, both the high-temperature compressor and the low-temperature compressor are in operation. This method, by controlling the operating states of the high-temperature compressor and the low-temperature compressor based on the test chamber's temperature and humidity requirements and the operational requirements of the preset temperature and humidity curve, solves the problem of uncontrollable temperature and humidity and varying degrees of temperature and humidity fluctuations during the switching time between different compressors in existing technologies, thereby improving the reliability of temperature and humidity control.

[0053] Example 2

[0054] Figure 2 This is a flowchart of a temperature and humidity control method for a test chamber according to Embodiment 2 of the present invention. This embodiment is applicable to temperature and humidity control of test chambers, etc. The method can be executed by a temperature and humidity control device for the test chamber. This device can be implemented in the form of software and / or hardware. The device can be integrated into an electronic device such as a computer that has temperature and humidity control function for the test chamber. The temperature and humidity of the test chamber are regulated by a high-temperature compressor and a low-temperature compressor. The method specifically includes the following steps:

[0055] Step 210: Receive the test chamber's operation requirements instruction.

[0056] Step 220: Determine whether the test chamber requires dehumidification based on the operational requirements.

[0057] Step 230: When it is determined that the test chamber has a dehumidification requirement, determine whether the test chamber has a preset temperature and humidity curve operation requirement.

[0058] Step 240: When it is determined that the test chamber has a preset temperature and humidity curve operation requirement, control both the high-temperature stage compressor and the low-temperature stage compressor to work, and control the valves connected to the high-temperature stage compressor and the valves connected to the low-temperature stage compressor to open.

[0059] Specifically, it can control both the high-temperature and low-temperature compressors to start operating, and control the opening of valves connected to both the high-temperature and low-temperature compressors, such as solenoid valves. The operating speeds of the high-temperature and low-temperature compressors may differ, and can be adjusted according to actual temperature and humidity requirements; no specific limits are set here.

[0060] For example, the high-temperature stage compressor and the low-temperature stage compressor can dehumidify the test chamber during operation. The low-temperature stage compressor is charged with refrigerant, and the refrigerant evaporation pressure corresponds to an evaporation temperature of -82.2℃. The large heat exchange temperature difference at the evaporation temperature results in a large cooling capacity, which can meet the requirement of maintaining relative humidity below 30% at -35℃ and -40℃ (the dew point temperature corresponding to 30% RH relative humidity at -35℃ is -44.59℃; the dew point temperature corresponding to 30% RH relative humidity at -40℃ is -48.67℃). Dehumidification control through the operation of the high-temperature stage compressor and the low-temperature stage compressor can ensure the overall consistency of the preset temperature and humidity curves and achieve the control requirements of the overall curve. Humidity is regulated throughout the process by the high-temperature stage compressor and the low-temperature stage compressor. To prevent frost formation on the evaporator, a dehumidification device can be installed to control the dew point temperature of the air entering the chamber below -40℃, maintain a slight positive pressure inside the test chamber, and prevent high-humidity external air from entering the test chamber and frosting on the evaporator surface.

[0061] Step 250: When it is determined that the test chamber does not have the operating requirement of a preset temperature and humidity curve, control the high-temperature stage compressor to work and control the valves connected to the high-temperature stage compressor to open.

[0062] Step 260: If it is determined that the test chamber does not require dehumidification, determine whether the test chamber requires cooling.

[0063] Step 270: When it is determined that the test chamber needs to be cooled, control both the high-temperature compressor and the low-temperature compressor to work, and control the valves connected to the high-temperature compressor and the low-temperature compressor to be opened.

[0064] Step 280: When it is determined that the test chamber does not require cooling, determine whether the temperature of the test chamber is within the preset temperature range.

[0065] Specifically, the test chamber can be equipped with a temperature sensor to collect temperature data. The temperature and humidity control device of the test chamber can be electrically connected to the temperature sensor to obtain the temperature of the test chamber. The temperature and humidity control device can pre-store a preset temperature range to determine whether the temperature of the test chamber is within the preset temperature range.

[0066] Step 290: If the temperature of the test chamber is within the preset temperature range, control the high-temperature compressor to work and control the valves connected to the high-temperature compressor to open.

[0067] Step 291: If the temperature of the test chamber exceeds the preset temperature range, control both the high-temperature compressor and the low-temperature compressor to work, and control the valves connected to the high-temperature compressor and the low-temperature compressor to open.

[0068] The specific size of the preset temperature range can be set according to the actual temperature and humidity requirements, and is not limited here.

[0069] Figure 4 This is a flowchart of another temperature and humidity control method for a test chamber provided in Embodiment 2 of the present invention. The method includes the following steps:

[0070] Step 1: Receive the test chamber's operation requirements instructions.

[0071] Step 2: Based on the operational requirements, determine whether the test chamber requires dehumidification; if yes, proceed to Step 3; if no, proceed to Step 6.

[0072] Step 3: Determine if the test chamber requires a preset temperature and humidity curve for operation; if yes, proceed to step 4; if no, proceed to step 5.

[0073] Step 4: Control both the high-temperature stage compressor and the low-temperature stage compressor to operate, and control the valves connected to the high-temperature stage compressor and the low-temperature stage compressor to open, and then end.

[0074] Step 5: Control the operation of the high-temperature stage compressor, control the opening of the valves connected to the high-temperature stage compressor, and then end the process.

[0075] Step 6: Determine if the test chamber requires cooling; if yes, proceed to step 7; if no, proceed to step 8.

[0076] Step 7: Control both the high-temperature stage compressor and the low-temperature stage compressor to operate, and control the valves connected to the high-temperature stage compressor and the low-temperature stage compressor to open, and then end.

[0077] Step 8: Determine if the temperature of the test chamber is within the preset temperature range; if yes, proceed to step 9; if no, proceed to step 10.

[0078] Step 9: Control the operation of the high-temperature stage compressor, control the opening of the valves connected to the high-temperature stage compressor, and then end the process.

[0079] Step 10: Control both the high-temperature stage compressor and the low-temperature stage compressor to operate, and control the valves connected to the high-temperature stage compressor and the low-temperature stage compressor to open.

[0080] The temperature and humidity control method for the test chamber provided in this embodiment controls the working status of the high-temperature compressor and the low-temperature compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve. For example, when the preset temperature and humidity curve is running, both the high-temperature compressor and the low-temperature compressor are in working state. This can solve the problem of uncontrollable temperature and humidity in the switching time chamber when different compressors are working in the prior art, and the temperature and humidity fluctuate to different degrees, thereby improving the reliability of temperature and humidity control.

[0081] Example 3

[0082] Figure 5 This is a structural block diagram of a temperature and humidity control device for a test chamber according to Embodiment 3 of the present invention. The temperature and humidity of the test chamber are regulated by a high-temperature compressor and a low-temperature compressor. The temperature and humidity control device includes: an instruction receiving module 310, a demand determination module 320, and a status control module 330. The instruction receiving module 310 receives the test chamber's operating demand instruction. The demand determination module 320 determines the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve based on the operating demand instruction. The status control module 330 controls the operating status of the high-temperature compressor and the low-temperature compressor based on the test chamber's temperature and humidity requirements and the operating requirements of the preset temperature and humidity curve to regulate the temperature and humidity of the test chamber. When the preset temperature and humidity curve is running, both the high-temperature compressor and the low-temperature compressor are in operating condition.

[0083] Optionally, the requirement determination module 320 includes: a dehumidification requirement determination unit and an operation requirement determination unit; wherein, the dehumidification requirement determination unit is used to determine whether the test chamber has a dehumidification requirement according to the operation requirement instruction; the operation requirement determination unit is used to determine whether the test chamber has an operation requirement with a preset temperature and humidity curve when it is determined that the test chamber has a dehumidification requirement.

[0084] Optionally, the state control module 330 includes a first state control unit, which is used to control both the high-temperature compressor and the low-temperature compressor to work when it is determined that the test chamber has a preset temperature and humidity curve operation requirement, and to control the valves connected to the high-temperature compressor and the low-temperature compressor to open.

[0085] Optionally, the state control module 330 includes a second state control unit, which controls the high-temperature stage compressor to work and controls the valves connected to the high-temperature stage compressor to open when it is determined that the test chamber does not have the operating requirements of a preset temperature and humidity curve.

[0086] Optionally, the demand determination module 320 includes a dehumidification demand determination unit and a cooling demand determination unit; wherein, the dehumidification demand determination unit is used to determine whether the test chamber has a dehumidification demand based on the operation demand instruction; the cooling demand determination unit is used to determine whether the test chamber has a cooling demand when it is determined that the test chamber does not have a dehumidification demand.

[0087] Optionally, the state control module 330 includes: a third state control unit, which is used to control both the high-temperature compressor and the low-temperature compressor to work when it is determined that the test chamber has a cooling requirement, and to control the valves connected to the high-temperature compressor and the low-temperature compressor to open.

[0088] Optionally, the state control module 330 includes a range determination unit and a fourth state control unit. The range determination unit is used to determine whether the temperature of the test chamber is within the preset temperature range when it is determined that the test chamber has no cooling requirement. The fourth state control unit is used to control the high-temperature stage compressor to work and control the valve connected to the high-temperature stage compressor to open if the temperature of the test chamber is within the preset temperature range.

[0089] Optionally, the state control module 330 includes: a range determination unit and a fifth state control unit. The range determination unit is used to determine whether the temperature of the test chamber is within the preset temperature range when it is determined that the test chamber has no cooling requirement. The fifth state control unit is used to control both the high-temperature stage compressor and the low-temperature stage compressor to work if the temperature of the test chamber exceeds the preset temperature range, and to control the valves connected to the high-temperature stage compressor and the low-temperature stage compressor to open.

[0090] The temperature and humidity control device for the test chamber provided in this embodiment belongs to the same inventive concept as the temperature and humidity control method for the test chamber provided in any embodiment of the present invention, and has corresponding beneficial effects. For technical details not detailed in this embodiment, please refer to the temperature and humidity control method for the test chamber provided in any embodiment of the present invention.

[0091] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for controlling temperature and humidity in a test chamber, characterized in that, The temperature and humidity of the test chamber are regulated by a high-temperature compressor and a low-temperature compressor. The temperature and humidity control method includes: Receive the operational requirements instructions from the test chamber; Based on the operational requirements instruction, determine the temperature and humidity requirements of the test chamber and the operational requirements of the preset temperature and humidity curve; According to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve, the working status of the high-temperature stage compressor and the low-temperature stage compressor are controlled to adjust the temperature and humidity of the test chamber. The step of controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes: When it is determined that the test chamber has no dehumidification requirement and no cooling requirement, determine whether the temperature of the test chamber is within the preset temperature range; If the temperature of the test chamber exceeds the preset temperature range, both the high-temperature compressor and the low-temperature compressor will be controlled to operate, and the valves connected to the high-temperature compressor and the low-temperature compressor will be opened.

2. The temperature and humidity control method according to claim 1, characterized in that, The step of controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes: When it is determined that the test chamber has no dehumidification requirement and no cooling requirement, determine whether the temperature of the test chamber is within the preset temperature range; If the temperature of the test chamber is within the preset temperature range, the high-temperature compressor is controlled to operate, and the valves connected to the high-temperature compressor are controlled to open.

3. The temperature and humidity control method according to claim 1, characterized in that, The step of controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes: When it is determined that the test chamber does not require dehumidification, and when it is determined that the test chamber requires cooling, both the high-temperature compressor and the low-temperature compressor are controlled to work, and the valves connected to the high-temperature compressor and the low-temperature compressor are controlled to open.

4. The temperature and humidity control method according to any one of claims 1-3, characterized in that, The test chamber also includes a temperature sensor and a temperature and humidity control device. The temperature sensor is installed in the test chamber to collect the temperature. The temperature and humidity control device is electrically connected to the temperature sensor to obtain the temperature of the test chamber. The temperature and humidity control device stores a preset temperature range in advance to determine whether the temperature of the test chamber is within the preset temperature range.

5. The temperature and humidity control method according to claim 1, characterized in that, The step of controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes: When it is determined that the test chamber has a dehumidification requirement, it is determined whether the test chamber has an operational requirement with a preset temperature and humidity curve; When it is determined that the test chamber has a preset temperature and humidity curve operation requirement, both the high-temperature stage compressor and the low-temperature stage compressor are controlled to work, and the valves connected to the high-temperature stage compressor and the low-temperature stage compressor are controlled to open.

6. The temperature and humidity control method according to claim 5, characterized in that, The step of controlling the operating states of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve includes: When it is determined that the test chamber has a dehumidification requirement, it is determined whether the test chamber has an operational requirement with a preset temperature and humidity curve; When it is determined that the test chamber does not require operation based on a preset temperature and humidity curve, the high-temperature stage compressor is controlled to operate, and the valves connected to the high-temperature stage compressor are controlled to open.

7. The temperature and humidity control method according to any one of claims 5-6, characterized in that, The test chamber also includes a drying and dehumidification device to control the dew point temperature of the air entering the chamber to below -40°C.

8. A temperature and humidity control device for a test chamber, characterized in that, The temperature and humidity of the test chamber are regulated by a high-temperature compressor and a low-temperature compressor. The temperature and humidity control device includes: The instruction receiving module is used to receive the operation requirements instructions of the test chamber; The requirement determination module is used to determine the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve based on the operation requirement instruction. The status control module is used to control the working status of the high-temperature stage compressor and the low-temperature stage compressor according to the temperature and humidity requirements of the test chamber and the operating requirements of the preset temperature and humidity curve, so as to adjust the temperature and humidity of the test chamber. The state control module includes a range determination unit and a fifth state control unit; The range determination unit is used to determine whether the temperature of the test chamber is within a preset temperature range when it is determined that the test chamber has no cooling requirement; The fifth state control unit is used to control both the high-temperature compressor and the low-temperature compressor to work if the temperature of the test chamber exceeds the preset temperature range, and to control the valves connected to the high-temperature compressor and the low-temperature compressor to open.

9. The temperature and humidity control device according to claim 8, characterized in that, The requirement determination module includes: The cooling requirement determination unit is used to determine whether the test chamber has a cooling requirement when it is determined that the test chamber does not have a dehumidification requirement.

10. The temperature and humidity control device according to claim 8, characterized in that, The status control module includes: The first state control unit is used to control both the high-temperature compressor and the low-temperature compressor to work when it is determined that the test chamber has a preset temperature and humidity curve operation requirement, and to control the opening of the valves connected to the high-temperature compressor and the valves connected to the low-temperature compressor.

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