Humidifying device for high-low-temperature damp-heat low-pressure test box

Abstract

The utility model discloses a high and low temperature damp and hot low pressure test box humidifying device, which comprises a test box body, a vacuum pump and a water tank, a humidity electronic sensor is fixedly arranged on the inner wall surface of the test box body, and a vacuum motor is arranged on the test box body; water firstly passes through the water storage barrel and then enters the humidifying barrel through the lower communicating pipe, so that cold water and hot water are combined, a buffering effect is achieved, and fluctuation of pressure in the test box can be reduced; the upper communicating pipe is not immersed in water and can share a part of pressure rise generated by cold water supplement, so that the pressure fluctuation in the box is within an allowable range; the water storage barrel is controlled by a float switch to automatically replenish water which is not higher than the communicating pipe on the water storage barrel, so that the heating pipe is always immersed in water; the pressure fluctuation is reduced, so that parts such as a floating ball switch and an electromagnetic valve mounted in a water path are not affected by pressure difference, and the performance is stable and long-time operation can be realized; components of the humidification system are optimized, the overall space is reduced, and the size of the test box is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental testing in the electrical and electronic industry, and particularly to a humidifying device for a high and low temperature, humid and hot, and low air pressure test chamber. Background Art

[0002] In the prior art, a high and low temperature, humid and hot, and low air pressure test chamber performs cyclic humidification through a humidifying bucket equipped with two water storage buckets on the left and right. The left and right water storage buckets are installed at different heights, and float switches in the two water storage buckets are used to monitor the water volume in the humidifying bucket. Each water storage bucket has only one pipeline connected to the humidifying bucket. Through use, it is found that when the humidifying bucket automatically replenishes water, the pressure in the test chamber fluctuates greatly and cannot tend to a stable state for a long time, and some test data will be affected; after a long-term test, the humidifying bucket does not replenish water in time, and the test value cannot reach the set value; after not performing humidity-related tests regularly, when performing high and low temperatures, low pressure, and humidity again, the uniformity in the chamber cannot meet the technical requirements; the space occupied by the humidifying system is large, indirectly causing the volume and floor space of the entire test chamber to become larger. Content of the Utility Model

[0003] The purpose of the utility model is to provide a humidifying device for a high and low temperature, humid and hot, and low air pressure test chamber to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A humidifying device for a high and low temperature, humid and hot, and low air pressure test chamber, including a test chamber body, a vacuum pump, and a water tank. A humidity electronic sensor is fixedly arranged on the inner wall surface of the test chamber body, and a vacuum motor is arranged on the test chamber body.

[0005] The vacuum pump is connected to a first electromagnetic valve through a pipeline. The end of the first electromagnetic valve away from the vacuum pump is connected to the test chamber body through a pipeline. Inside the test chamber body, the pipeline outlet connected to the first electromagnetic valve is a vacuum extraction port, and a vacuum sensor is arranged on the pipeline between the vacuum extraction port and the first electromagnetic valve.

[0006] A submersible pump is arranged inside the water tank. The output end of the submersible pump is connected to a second electromagnetic valve through a pipeline. The output end of the second electromagnetic valve is connected to a water storage bucket through a pipeline. A water storage bucket float switch is arranged above the water storage bucket. A communicating pipe is arranged on one side of the water storage bucket. The end of the communicating pipe away from the water storage bucket is fixedly provided with a humidifying bucket. A heating pipe is arranged below the inner part of the humidifying bucket. The top outlet of the humidifying bucket is connected to the test chamber body through a pipeline. Inside the test chamber body, the pipeline outlet connected to the top outlet of the humidifying bucket is a steam port.

[0007] Inside the water tank, there is a water tank float switch and a lower water level of the water tank. The bottom of the water tank is connected to a ball valve through a pipeline. The output end of the ball valve is connected to the main water outlet through a pipeline. A connecting pipeline for the water storage bucket is provided on the pipeline between the ball valve and the main water outlet. The input end of the connecting pipeline for the water storage bucket is fixedly connected to a water storage bucket ball valve. The output end of the water storage bucket ball valve and the output end of the second solenoid valve are connected to the bottom of the water storage bucket through a tee. A third solenoid valve is connected to the connecting pipeline for the water storage bucket through a pipeline. One end of the third solenoid valve is connected to the test chamber through a pipeline. Inside the test chamber, the outlet of the pipeline connected to the third solenoid valve is the inner box drain outlet.

[0008] Preferably, the installation position of the water storage bucket is lower than that of the humidifying bucket, and the connecting position of the connecting pipe is higher than the maximum water level of the humidifying bucket.

[0009] Preferably, the diameter of the vacuum extraction port is smaller than that of the steam port.

[0010] Preferably, the top diameter of the humidifying bucket gradually decreases.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: The water replenished into the humidifying bucket enters the humidifying bucket from the water tank through the water storage bucket. There is no heating device in the water tank, that is, the replenished water is cold water. The humidifying bucket generates water vapor during the test and is in a hot water state itself. Cold water cannot directly enter the humidifying bucket and needs to pass through the water storage bucket first. It flows in from the tee at the lower end of the water storage bucket and then enters the humidifying bucket through the lower connecting pipe, so that cold and hot water are combined to play a buffering role and can reduce the pressure fluctuation in the test chamber; and since the upper connecting pipe is not immersed in water, it can share part of the pressure increase caused by the replenishment of cold water, so that the pressure fluctuation in the box is within the allowable range; the water storage bucket controls automatic water replenishment with a float switch, and the highest level does not exceed the upper connecting pipe of the water storage bucket, so that the heating pipe is always immersed in water; the reduction of pressure fluctuation makes components such as the float switch and solenoid valve installed in the water circuit no longer affected by the pressure difference, so the performance is stable and it can operate for a long time; the components of the humidifying system are optimized, and the overall space is reduced, so that the volume of the test chamber is reduced. Description of the Drawings

[0012] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0013] In the figure: 1. Test chamber; 2. Humidity electronic sensor; 3. Vacuum motor; 4. Vacuum extraction port; 5. Steam port; 6. Inner box drain outlet; 7. Vacuum sensor; 8. Connecting pipe; 9. Humidifying bucket; 10. Heating pipe; 11. Third solenoid valve; 12. Main water outlet; 13. Water storage bucket float switch; 14. Water storage bucket; 15. Water storage bucket ball valve; 16. First solenoid valve; 17. Second solenoid valve; 18. Water tank float switch; 19. Lower water level of the water tank; 20. Ball valve; 21. Water tank; 22. Submersible pump; 23. Vacuum pump. Detailed implementation mode

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0015] Please refer to FIG. 1. An embodiment provided by the present invention: A humidifying device for a high and low temperature, humid and low pressure test chamber, including a test chamber 1, a vacuum pump 23 and a water tank 21. A humidity electronic sensor 2 is fixedly arranged on the inner wall surface of the test chamber 1. A vacuum motor 3 is arranged on the test chamber 1.

[0016] The vacuum pump 23 is connected to a first solenoid valve 16 through a pipeline. One end of the first solenoid valve 16 away from the vacuum pump 23 is connected to the test chamber 1 through a pipeline. Inside the test chamber 1, the pipeline outlet connected to the first solenoid valve 16 is a vacuum extraction port 4. A vacuum sensor 7 is arranged on the pipeline between the vacuum extraction port 4 and the first solenoid valve 16; the vacuum pump 23 performs low-pressure treatment on the air in the test chamber 1, and the vacuum pump 23 completely separates the water vapor in the test chamber 1 by using the water-oil filter it carries.

[0017] A submersible pump 22 is arranged in the water tank 21. The output end of the submersible pump 22 is connected to a second solenoid valve 17 through a pipeline. The output end of the second solenoid valve 17 is connected to a water storage bucket 14 through a pipeline. A water storage bucket float switch 13 is arranged above the water storage bucket 14. A communicating pipe 8 is arranged on one side of the water storage bucket 14. One end of the communicating pipe 8 away from the water storage bucket 14 is fixedly provided with a humidifying bucket 9. A heating pipe 10 is arranged below the interior of the humidifying bucket 9. The top outlet of the humidifying bucket 9 is connected to the test chamber 1 through a pipeline. Inside the test chamber 1, the pipeline outlet connected to the top outlet of the humidifying bucket 9 is a steam port 5; the submersible pump 22 conveys water into the water storage bucket 14, and then the water enters the humidifying bucket 9 for heating. The heat generated by the heating pipe 10 vaporizes the water in the humidifying bucket 9 to generate water vapor, which is conveyed into the test chamber 1. And the humidifying bucket 9 is replenished with water through the auxiliary water storage bucket 14. The water storage bucket 14 and the humidifying bucket 9 are connected by two upper and lower communicating pipes 8, and the water replenishment is completed through the second solenoid valve 17. The water storage bucket float switch 13 is used for continuous water replenishment and stopping water replenishment;

[0018] Inside the water tank 21, there is a water tank float switch 18 and a lower water level 19 of the water tank. The bottom of the water tank 21 is connected to a ball valve 20 through a pipe. The output end of the ball valve 20 is connected to the main water outlet 12 through a pipe. There is a connecting pipe for the storage bucket on the pipe between the ball valve 20 and the main water outlet 12. The input end of the connecting pipe for the storage bucket is fixedly connected to a storage bucket ball valve 15. The output end of the storage bucket ball valve 15 and the output end of the second solenoid valve 17 are connected to the bottom of the storage bucket 14 through a tee. The connecting pipe for the storage bucket is connected to a third solenoid valve 11 through a pipe. One end of the third solenoid valve 11 is connected to the test chamber 1 through a pipe. Inside the test chamber 1, the outlet of the pipe connected to the third solenoid valve 11 is the inner box drain port 6. Manual drainage is carried out through the storage bucket ball valve 15 so that water does not stay inside the storage bucket 14 for a long time and damage the storage bucket float switch 13.

[0019] The installation position of the storage bucket 14 is lower than that of the humidifying bucket 9. The connecting position of the connecting pipe 8 is higher than the maximum water level of the humidifying bucket 9. The storage bucket 14 is automatically replenished with water controlled by a float switch, and the highest level does not exceed the connecting pipe 8 on the storage bucket 14, so that the heating pipe 10 is always immersed in water.

[0020] The diameter of the vacuum pumping port 4 is smaller than that of the steam port 5, leaving enough space for the steam port 5 to prevent excessive pressure changes.

[0021] The top diameter of the humidifying bucket 9 gradually decreases to reduce the pressure change during water replenishment.

[0022] Working principle: Set the test values when starting the machine. The humidifying system receives the signal and starts to work. First, the submersible pump 22 adds pure water in the water tank 21 to the bottom tee of the storage tank 14 through the second solenoid valve 17, and enters the humidifying bucket 9 through the lower connecting pipe 8. The heating pipe 10 starts to heat the pure water, and the water flow rate is controlled by the second solenoid valve 17. The pure water in the humidifying bucket 9 generates water vapor after heating, and finally enters the test chamber 1 from the steam port 5;

[0023] At the same time, the vacuum pump 23 starts to run, and the air in the test chamber 1 is subjected to low-pressure treatment through the first solenoid valve 16. The water vapor generated in the test chamber 1 due to the humidifying system can be completely separated by the water-oil filter carried by the vacuum pump 23 itself;

[0024] After a period of time, when the storage bucket float switch 13 in the storage tank 14 reaches the highest water level, the second solenoid valve 17 controls to stop water inlet. During the test process, if the water level is lower than the highest water level of the storage bucket float switch 13, continuous water replenishment will be carried out. At this time, the replenished water will have a temperature difference from the water in the storage tank 14. Since the upper connecting pipe 8 is not immersed in water, it can share a part of the pressure increase caused by the cold water replenishment. The second solenoid valve 17 will control the water flow rate, and the water volume will not affect the test water;

[0025] When the test is over or the equipment is deactivated, the pure water in the water storage tank 14, the humidifying bucket 9, and the water tank 21 needs to be discharged through the water storage bucket ball valve 15 and the ball valve 20 respectively via the main water outlet 12. In addition, the condensate water in the test chamber 1 is discharged through the inner box drain port 6 and the main water outlet 12 of the third solenoid valve.

Claims

1. A humidifying device for a high and low temperature, humid and hot, and low pressure test chamber, comprising a test chamber body (1), a vacuum pump (23), and a water tank (21), characterized in that: A humidity electronic sensor (2) is fixedly arranged on the inner wall surface of the test box body (1), and a vacuum motor (3) is arranged on the test box body (1). The vacuum pump (23) is connected to a first electromagnetic valve (16) through a pipeline. One end of the first electromagnetic valve (16) far from the vacuum pump (23) is connected to the test box body (1) through a pipeline. Inside the test box body (1), the outlet of the pipeline connected to the first electromagnetic valve (16) is a vacuum extraction port (4), and a vacuum sensor (7) is arranged on the pipeline between the vacuum extraction port (4) and the first electromagnetic valve (16). A submersible pump (22) is arranged inside the water tank (21). The output end of the submersible pump (22) is connected to a second electromagnetic valve (17) through a pipeline. The output end of the second electromagnetic valve (17) is connected to a water storage bucket (14) through a pipeline. A water storage bucket float switch (13) is arranged above the water storage bucket (14). A communicating pipe (8) is arranged on one side of the water storage bucket (14). One end of the communicating pipe (8) far from the water storage bucket (14) is fixedly provided with a humidifying bucket (9). A heating pipe (10) is arranged below the interior of the humidifying bucket (9). The top outlet of the humidifying bucket (9) is connected to the test box body (1) through a pipeline. Inside the test box body (1), the outlet of the pipeline connected to the top outlet of the humidifying bucket (9) is a steam port (5). A water tank float switch (18) and a lower water level of the water tank (19) are arranged inside the water tank (21). The bottom of the water tank (21) is connected to a ball valve (20) through a pipeline. The output end of the ball valve (20) is connected to a total water outlet (12) through a pipeline. A water storage bucket connecting pipeline is arranged on the pipeline between the ball valve (20) and the total water outlet (12). The input end of the water storage bucket connecting pipeline is fixedly connected to a water storage bucket ball valve (15). The output end of the water storage bucket ball valve (15) and the output end of the second electromagnetic valve (17) are connected to the bottom of the water storage bucket (14) through a tee joint. A third electromagnetic valve (11) is connected to the water storage bucket connecting pipeline through a pipeline. One end of the third electromagnetic valve (11) is connected to the test box body (1) through a pipeline. Inside the test box body (1), the outlet of the pipeline connected to the third electromagnetic valve (11) is an inner box drain port (6).

2. The humidifying device of a high and low temperature, humidity and low air pressure test chamber according to claim 1, characterized in that: The installation position of the water storage bucket (14) is lower than that of the humidifying bucket (9), and the communicating position of the communicating pipe (8) is higher than the maximum water level of the humidifying bucket (9).

3. The humidifying device of a high and low temperature, humidity and low air pressure test chamber according to claim 1, characterized in that: The diameter of the vacuum extraction port (4) is smaller than that of the steam port (5).

4. A humidifying device for a high and low temperature, humid and hot, and low air pressure test chamber according to claim 1, characterized in that: The top diameter of the humidifying bucket (9) gradually decreases.

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