Low-temperature low-humidity humid heat test box

Abstract

The utility model relates to the technical field of electric power testing, and discloses a low-temperature low-humidity hot-humid test box which comprises a test box body, a partition plate is fixedly installed in the test box body and divides the test box body into a working chamber and an air duct, and a fan is fixedly installed on the side, close to the left wall of the test box body, in the air duct. A humidity sensor used for detecting humidity is fixedly installed in the test box, a temperature sensor used for detecting temperature is fixedly installed in the test box, and according to the low-temperature and low-humidity humid-hot test box, original air in a working chamber is replaced by continuously introducing dry air with low dew-point temperature (-60 DEG C or even lower); by means of the mode, when the temperature of the working chamber is low, due to the fact that the air is dry, the air cannot be frozen when passing through the working chamber under the low-temperature condition, and the problems that circulation of the air in the box is hindered after the air is frozen, and the working efficiency of the working chamber is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power testing, in particular to a low-temperature, low-humidity and wet-heat testing box. Background Art

[0002] Low temperature, low humidity and heat test chamber is a kind of test equipment specially used to simulate low temperature and low humidity environment. It is widely used in aviation, automobile, home appliances, scientific research and other fields. It is mainly used to test and determine the performance of electrical, electronic and other products and materials in low temperature and low humidity environment.

[0003] The conventional dehumidification method is mechanical dehumidification through a dehumidifier, that is, by lowering the surface temperature of the dehumidifier. However, in a low temperature environment, when the water vapor in the air passes through the dehumidifier, it will quickly freeze on its surface. The frozen dehumidifier will hinder the circulation of air in the box, and the dehumidification capacity of the dehumidifier will also be greatly reduced, failing to achieve the ideal dehumidification effect, and thus failing to meet the humidity requirements under low temperature conditions. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a low-temperature, low-humidity and wet heat test chamber, which has the advantages of being able to be used in a low-temperature environment and having high working efficiency. It solves the problem that in a low-temperature environment, when water vapor in the air passes through a dehumidifier, it will quickly freeze on its surface, and the frozen dehumidifier will hinder the circulation of air in the chamber, and the dehumidification capacity of the dehumidifier will also be greatly reduced, thereby failing to achieve an ideal dehumidification effect.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of being able to be used in a low temperature environment and having high working efficiency, the utility model provides the following technical solutions: a low temperature, low humidity and heat test box, comprising a test box, a partition plate is fixedly installed in the test box, the partition plate divides the test box into a working room and an air duct, a fan is fixedly installed on one side of the air duct near the left wall of the test box, a humidity sensor for detecting humidity is fixedly installed in the test box, and a temperature sensor for detecting temperature is fixedly installed in the test box;

[0008] The output shaft of the fan rotates and penetrates into the test box, and is fixedly plugged with the input shaft of the fan. The air outlet of the fan is located between the partition plate and the left wall of the test box.

[0009] An evaporator is fixedly installed in the air duct, a heater is fixedly installed in the air duct, a dehumidifier is fixedly installed between the evaporator and the heater, and a filter control component is arranged on the test box, and the filter control component is used for filtering, drying and controlling the air entering the test box.

[0010] Preferably, the filtration control assembly includes a pipeline, which is fixedly connected to the rear wall of the test box, and the pipeline is located between the heater and the fan and communicates with them.

[0011] Preferably, a solenoid valve for controlling the air flow rate is installed on the pipeline, and a dryer is installed on the pipeline, and the dryer is used to dry the compressed air so that the dew point temperature reaches above -°C or below.

[0012] Preferably, a pressure controller for measuring and controlling pressure is installed on the pipeline, and a pressure regulating valve is installed on the pipeline, and the pressure regulating valve is used to automatically eliminate the residual pressure head and the flow deviation caused by pressure fluctuation.

[0013] Preferably, a pre-filter is installed on the pipeline, the pre-filter is used for preliminary filtering of the compressed air before drying, the pre-filter is located between the dryer and the pressure regulating valve, and a post-filter is installed on the pipeline, the post-filter is used for further filtering the compressed air after drying by the dryer.

[0014] Preferably, an L-shaped upper cover is slidably mounted at the opening of the test box, a handle is fixedly connected to the outer surface of the L-shaped upper cover, and a sealing strip for ensuring air tightness is provided between the L-shaped upper cover and the edge of the test box.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a low temperature, low humidity and heat test chamber, which has the following beneficial effects:

[0017] 1. This low-temperature, low-humidity and wet heat test chamber continuously introduces dry air with a low dew point temperature (-60℃ or even lower) into the working room to replace the original air in the working room, so that the air humidity in the replaced working room meets the requirements. In this way, when the temperature in the working room is low, the air is relatively dry, so it will not freeze when passing through the dehumidifier under low temperature conditions, avoiding the problem that the frozen dehumidifier will hinder the circulation of air in the box and affect its working efficiency.

[0018] 2. In this low-temperature, low-humidity and wet heat test chamber, when the compressed air enters the pipeline, it first passes through the pressure regulating valve and the pressure controller, so that the compressed air entering the pipeline can be effectively controlled and identified, and then the compressed air enters the pre-filter, so that the compressed air can be initially filtered, avoiding the problem of impurities in the compressed air affecting the operation of the dryer and its drying effect. Then the compressed air passes through the dryer, and the dryer dries the compressed air to make the dew point temperature reach above -60℃ or below, and then the dried compressed air will be further filtered by the post-filter, so that the quality of the air finally entering the studio can be effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the external and internal structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the filter control component of the utility model.

[0022] In the figure: 1. test chamber; 2. partition; 3. workroom; 4. air duct; 5. fan; 6. motor; 7. evaporator; 8. dehumidifier; 9. heater; 10. pipeline; 11. solenoid valve; 12. post-filter; 13. dryer; 14. pre-filter; 15. pressure regulating valve; 16. pressure controller; 17. L-shaped cover; 18. handle; 19. humidity sensor; 20. temperature sensor. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-3 The utility model provides a new technical solution: a low-temperature, low-humidity and wet heat test chamber, comprising a test chamber 1, a partition plate 2 is fixedly installed in the test chamber 1, the partition plate 2 divides the test chamber 1 into a working room 3 and an air duct 4, a fan 5 is fixedly installed on one side of the air duct 4 near the left wall of the test chamber 1, a humidity sensor 19 for detecting humidity is fixedly installed in the test chamber 1, and a temperature sensor 20 for detecting temperature is fixedly installed in the test chamber 1;

[0025] Furthermore, the output shaft of the fan 5 rotates and penetrates into the test box 1, and is fixedly plugged with the input shaft of the fan 5, and the air outlet of the fan 5 is located between the partition plate 2 and the left wall of the test box 1;

[0026] Furthermore, an evaporator 7 is fixedly installed in the air duct 4, a heater 9 is fixedly installed in the air duct 4, a dehumidifier 8 is fixedly installed between the evaporator 7 and the heater 9, and a filter control component is provided on the test box 1, which is used to filter, dry and control the air entering the test box 1.

[0027] Furthermore, the filtration control assembly includes a pipe 10, which is fixedly connected to the rear wall of the test box 1. The pipe 10 is located between the heater 9 and the fan 5 and communicates with them.

[0028] Furthermore, a solenoid valve 11 for controlling the air flow rate is installed on the pipeline 10, and a dryer 13 is installed on the pipeline 10. The dryer 13 is used to dry the compressed air so that the dew point temperature reaches above -60°C or below.

[0029] Furthermore, a pressure controller 16 for measuring and controlling pressure is installed on the pipeline 10 , and a pressure regulating valve 15 is installed on the pipeline 10 . The pressure regulating valve 15 is used to automatically eliminate the residual pressure head and the flow deviation caused by the pressure fluctuation.

[0030] Furthermore, a pre-filter 14 is installed on the pipeline 10, and the pre-filter 14 is used for preliminary filtering of the compressed air before drying. The pre-filter 14 is located between the dryer 13 and the pressure regulating valve 15. A post-filter 12 is installed on the pipeline 10, and the post-filter 12 is used for further filtering the compressed air after drying by the dryer 13.

[0031] Furthermore, an L-shaped upper cover 17 is slidably mounted at the opening of the test box 1 , a handle 18 is fixedly connected to the outer surface of the L-shaped upper cover 17 , and a sealing strip for ensuring airtightness is provided between the L-shaped upper cover 17 and the edge of the test box 1 .

[0032] Furthermore, when in use, by connecting the end of the pipe 10 away from the test box 1 to the compressed air, when the compressed air enters the pipe 10, it first passes through the pressure regulating valve 15 and the pressure controller 16, so that the compressed air entering the pipe 10 can be effectively controlled and identified, and then the compressed air enters the pre-filter 14, so that the compressed air can be initially filtered, avoiding the problem of impurities in the compressed air affecting the operation of the dryer 13 and its drying effect, and then the compressed air passes through the dryer 13, the dryer 13 dries the compressed air to make the dew point temperature reach above -60°C or below, and then the dried compressed air will be further filtered by the post-filter 12, so that the quality of the air finally entering the working room 3 can be effectively guaranteed.

[0033] Furthermore, when the compressed air passes through the solenoid valve 11, the solenoid valve 11 can control the flow rate of the dried compressed air, and then the dried compressed air enters the air duct 4, and the started motor 6 drives the fan 5 to transport the compressed air entering the air duct 4 to the working room 3, and the fan 5 can also suck the air that circulates in the working room 3 into the air duct 4 from the gap at the other end of the partition plate 2, and the water therein is initially evaporated by the evaporator 7, and then the dehumidifier 8 can further dehumidify the air, so that the water vapor in the air is evaporated in the dehumidifier. The air is cooled and liquefied, thereby reducing the content of water vapor in the air. The heater 9 then heats it and is re-input into the working room 3 by the fan 5 to complete the cycle. By continuously introducing dry air with a low dew point temperature (-60°C or even lower) into the working room 3, the original air in the working room is replaced, so that the air humidity in the replaced working room meets the requirements. In this way, when the temperature in the working room is low, the air is relatively dry, so it will not freeze when passing through the dehumidifier 8 under low temperature conditions, avoiding the problem that the dehumidifier 8 after freezing will hinder the circulation of air in the box and affect its working efficiency.

[0034] Working principle: When in use, the compressed air is connected to the end of the pipe 10 away from the test box 1. When the compressed air enters the pipe 10, it first passes through the pressure regulating valve 15 and the pressure controller 16, so that the compressed air entering the pipe 10 can be effectively controlled and identified, and then the compressed air enters the pre-filter 14, so that the compressed air can be initially filtered, avoiding the problem that impurities in the compressed air affect the operation of the dryer 13 and its drying effect, and then the compressed air passes through the dryer 13, the dryer 13 dries the compressed air to make the dew point temperature reach above -60°C or below, and then the dried compressed air will be further filtered by the post-filter 12, so that the quality of the air finally entering the studio 3 can be effectively guaranteed.

[0035] Furthermore, when the compressed air passes through the solenoid valve 11, the solenoid valve 11 can control the flow rate of the dried compressed air, and then the dried compressed air enters the air duct 4, and the started motor 6 drives the fan 5 to transport the compressed air entering the air duct 4 to the working room 3, and the fan 5 can also suck the air that circulates in the working room 3 into the air duct 4 from the gap at the other end of the partition plate 2, and the water therein is initially evaporated by the evaporator 7, and then the dehumidifier 8 can further dehumidify the air, so that the water vapor in the air is evaporated in the dehumidifier. The air is cooled and liquefied, thereby reducing the content of water vapor in the air. The heater 9 then heats it and is re-input into the working room 3 by the fan 5 to complete the cycle. By continuously introducing dry air with a low dew point temperature (-60°C or even lower) into the working room 3, the original air in the working room is replaced, so that the air humidity in the replaced working room meets the requirements. In this way, when the temperature in the working room is low, the air is relatively dry, so it will not freeze when passing through the dehumidifier 8 under low temperature conditions, avoiding the problem that the dehumidifier 8 after freezing will hinder the circulation of air in the box and affect its working efficiency.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low temperature, low humidity and heat test chamber, comprising a test chamber (1), characterized in that: A partition plate (2) is fixedly installed in the test box (1), and the partition plate (2) divides the test box (1) into a working room (3) and an air duct (4). A fan (5) is fixedly installed in the air duct (4) near the left wall of the test box (1). A humidity sensor (19) for detecting humidity is fixedly installed in the test box (1), and a temperature sensor (20) for detecting temperature is fixedly installed in the test box (1); The output shaft of the fan (5) rotates and penetrates into the test box (1), and is fixedly plugged with the input shaft of the fan (5), and the air outlet of the fan (5) is located between the partition plate (2) and the left wall of the test box (1); An evaporator (7) is fixedly installed in the air duct (4), a heater (9) is fixedly installed in the air duct (4), a dehumidifier (8) is fixedly installed between the evaporator (7) and the heater (9), and a filter control component is provided on the test box (1), and the filter control component is used to filter, dry and control the air entering the test box (1).

2. A low temperature, low humidity and heat test chamber according to claim 1, characterized in that: The filtering control assembly comprises a pipeline (10), the pipeline (10) is fixedly connected to the rear wall of the test box (1), and the pipeline (10) is located between the heater (9) and the fan (5) and communicates with them.

3. A low temperature, low humidity and heat test chamber according to claim 2, characterized in that: The pipeline (10) is provided with a solenoid valve (11) for controlling the air flow rate. The pipeline (10) is provided with a dryer (13) for drying the compressed air so that the dew point temperature reaches above -(60)°C or below.

4. A low temperature, low humidity and heat test chamber according to claim 2, characterized in that: The pipeline (10) is provided with a pressure controller (16) for measuring and controlling pressure, and the pipeline (10) is provided with a pressure regulating valve (15), which is used to automatically eliminate residual pressure head and flow deviation caused by pressure fluctuation.

5. A low temperature, low humidity and heat test chamber according to claim 4, characterized in that: The pipeline (10) is provided with a pre-filter (14), which is used for preliminarily filtering the compressed air before drying. The pre-filter (14) is located between the dryer (13) and the pressure regulating valve (15). The pipeline (10) is provided with a post-filter (12), which is used for further filtering the compressed air after drying by the dryer (13).

6. The low temperature, low humidity and heat test chamber according to claim 1, characterized in that: An L-shaped upper cover (17) is slidably mounted at the opening of the test box (1), a handle (18) is fixedly connected to the outer surface of the L-shaped upper cover (17), and a sealing strip for ensuring air tightness is provided between the L-shaped upper cover (17) and the edge of the test box (1).

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