Low-pressure humidity test box

Abstract

The utility model discloses a low air pressure humidity test box which comprises a first machine shell, a second machine shell is fixedly connected to the first machine shell, a vacuum pump is fixedly connected in the second machine shell, the input end of the vacuum pump is communicated and connected with a water vapor separation assembly, the water vapor separation assembly comprises a separation tank, and a reversing plate is fixedly connected in the separation tank. A reversing pipe is fixed to the reversing plate in a penetrating mode, and an air outlet hole is formed in the reversing pipe. The water vapor separation assembly is additionally arranged at the input end of the vacuum pump and enables air to generate rotational flow through the reversing pipe, the reversing plate and the separation tank, water vapor in the air is preliminarily separated through the centrifugal effect, and condensation of the water vapor is promoted by additionally arranging the refrigeration pipe on the reversing pipe; the baffles are additionally arranged in the air outlet holes at intervals to further block and separate water vapor, so that the separation effect is guaranteed, the water vapor is prevented from invading the vacuum pump, the service life of the vacuum pump is prolonged, and the assembly has the advantages of being long in service life and free of frequent maintenance and has good practicability.

Description

Technical Field

[0001] This utility model relates to the field of test chamber technology, and in particular to a low-pressure humidity test chamber. Background Technology

[0002] Low-pressure humidity test chambers provide a comprehensive low-pressure temperature and humidity testing environment for product reliability testing. During product testing, the interior of the test chamber must always be kept at a low pressure, so the vacuum pump must run continuously to evacuate the test chamber. However, due to the high humidity in the low-pressure humid environment, water vapor in the air enters the vacuum pump and mixes with the pump oil, causing the pump oil to emulsify, reducing the lubrication and sealing performance of the pump oil, thereby increasing pump wear and shortening the pump's service life. Existing technologies generally use water ring vacuum pumps, but these vacuum pumps are noisy and occupy a large area. Some technologies add a drying filter at the vacuum pump input end, but the drying filter needs to be replaced frequently, resulting in a short service life and frequent replacement, leading to high maintenance costs. Utility Model Content

[0003] The purpose of this invention is to provide a low-pressure humidity test chamber to solve the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a low-pressure humidity test chamber, including a first housing, a second housing fixedly connected to the first housing, a vacuum pump fixedly connected inside the second housing, a water vapor separation component conductively connected to the input end of the vacuum pump, the water vapor separation component including a separation tank, a reversing plate fixedly connected inside the separation tank, a reversing pipe fixedly connected through the reversing plate, an air outlet on the reversing pipe, a plurality of first baffles evenly distributed on one inner wall of the air outlet, a plurality of second baffles evenly distributed on the other inner wall, and the second baffles and the first baffles are spaced apart, a receiving cavity is formed on the reversing pipe, and a refrigeration pipe is fixedly connected inside the receiving cavity.

[0005] Preferably, a first pressure-bearing shell is fixedly connected inside the first housing, an insulation layer is fixedly connected inside the first pressure-bearing shell, a second pressure-bearing shell is fixedly connected inside the insulation layer, and the input end of the water vapor separation component is conductively connected inside the second pressure-bearing shell.

[0006] Preferably, the separator is provided with a gas outlet pipe, the input end of which is located at the top of the reversing plate, and the output end of which is connected to the input end of the vacuum pump. The separator is also provided with a gas inlet pipe, the output end of which is located at the bottom of the reversing plate. The gas inlet pipe is connected with a vacuum tube, and the input end of which is connected to the second pressure-bearing housing.

[0007] Preferably, a first drain pipe is conductively fixed to the lower surface of the separation tank, a first solenoid valve is conductively fixed to the first drain pipe, a water collection tank is conductively fixed to the output end of the first solenoid valve, and the water collection tank is fixedly connected to the first housing, a second solenoid valve is conductively fixed to the output end of the water collection tank, a second drain pipe is conductively fixed to the output end of the second solenoid valve, and the second drain pipe is fixedly fixed to the second housing.

[0008] Preferably, a motor is fixedly connected to the first housing, a rotating shaft is fixedly connected to the output end of the motor, a fan is fixedly connected to the rotating shaft, and the fan is disposed inside the second pressure-bearing housing. A door is hinged to the first housing, and an observation window is provided on the door.

[0009] Preferably, a humidifier is fixedly connected inside the second housing, and a third solenoid valve is conductively connected to the output end of the humidifier. A moisture delivery pipeline is conductively fixed to the output end of the third solenoid valve and is conductively connected to the second pressure-bearing housing.

[0010] Preferably, a compressor is fixedly connected inside the second housing, a condenser is conductively connected to the output end of the compressor, an evaporator is conductively connected to the output end of the condenser, and the evaporator is fixedly connected inside the second pressure-bearing housing, with the output end of the evaporator conductively connected to the input end of the compressor.

[0011] Preferably, a heat dissipation vent is provided on the second casing at the position corresponding to the condenser.

[0012] Preferably, a heater is fixedly connected inside the second pressure-bearing housing.

[0013] Preferably, a control panel is fixedly connected to the second housing, and the control panel is electrically connected to the vacuum pump, the first solenoid valve, the second solenoid valve, the humidifier, the third solenoid valve, the motor, the compressor, and the heater.

[0014] The low-pressure humidity test chamber provided by this utility model has the following advantages: A water vapor separation component is added to the vacuum pump input end. This component uses a reversing pipe, a reversing plate, and a separation tank to generate air vortex, initially separating water vapor from the air through centrifugal force. A cooling pipe is added to the reversing pipe to promote water vapor condensation, and spaced baffles are added to the air outlet to further block the separated water vapor, thus ensuring the separation effect and preventing water vapor from entering the vacuum pump, thereby extending the service life of the vacuum pump. This component has the advantages of long service life and no need for frequent maintenance, and has good practicality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall front view sectional structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the main sectional view of the water vapor separation component of this utility model;

[0019] Figure 4 This is a top view of the refrigeration pipe structure of this utility model.

[0020] In the diagram: 1. First housing; 11. First pressure-bearing housing; 12. Insulation layer; 13. Second pressure-bearing housing; 14. Door; 15. Observation window; 16. Second housing; 17. Heat dissipation vent; 2. Control panel; 3. Vacuum pump; 31. Water vapor separation assembly; 311. Separation tank; 312. First drain pipe; 313. Air outlet pipe; 314. Air inlet pipe; 315. Reversing plate; 316. Reversing pipe; 317. Air outlet. 318. First baffle; 319. Second baffle; 3110. Receiving cavity; 3111. Refrigeration pipe; 32. First solenoid valve; 33. Water collection tank; 34. Second solenoid valve; 35. Second drain pipe; 36. Vacuum pipe; 4. Humidifier; 41. Third solenoid valve; 42. Moisture delivery pipeline; 5. Motor; 51. Shaft; 52. Fan; 6. Compressor; 61. Condenser; 62. Evaporator; 7. Heater. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Please see the appendix Figure 1 -Appendix Figure 4This utility model provides an embodiment of a low-pressure humidity test chamber, comprising a first housing 1, a second housing 16 fixedly connected to the first housing 1, a vacuum pump 3 fixedly connected inside the second housing 16, and a water vapor separation component 31 conductively connected to the input end of the vacuum pump 3. The water vapor separation component 31 includes a separation tank 311, a reversing plate 315 fixedly connected inside the separation tank 311, a reversing pipe 316 fixedly connected through the reversing plate 315, an air outlet 317 on the reversing pipe 316, and multiple first baffles 318 evenly distributed on one inner wall of the air outlet 317, and on the other inner wall... Multiple second baffles 319 are evenly distributed, and the second baffles 319 and the first baffles 318 are spaced apart. A receiving cavity 3110 is opened on the reversing pipe 316, and a cooling pipe 3111 is fixedly connected in the receiving cavity 3110. The first housing 1 and the second housing 16 constitute the outer shell of the test chamber. The vacuum pump 3 is used to draw a vacuum. The water vapor separation component 31 guides the air through the reversing plate 315 and the reversing pipe 316, so that the air generates a swirling flow in the separation tank 311, and uses centrifugal force to separate water vapor. At the same time, the internal temperature of the separation tank 311 is reduced by the cooling pipe 3111, which promotes the condensation of water vapor. The air, after being separated and processed, enters the air outlet 317 after being agglomerated into large droplets. A first baffle 318 combined with a second baffle 319 further blocks water vapor. A first pressure-bearing shell 11 is fixedly connected inside the first housing 1. An insulation layer 12 is fixedly connected inside the first pressure-bearing shell 11. A second pressure-bearing shell 13 is fixedly connected inside the insulation layer 12. The input end of the water vapor separation component 31 is conductively connected to the second pressure-bearing shell 13. The first and second pressure-bearing shells 11 and 13 are used to improve the pressure-bearing capacity of the first housing 1, and the insulation layer 12 is used for heat preservation. An air outlet is conductively fixed on the separation tank 311. The outlet pipe 313 is connected to the input end of the vacuum pump 3, and the output end of the outlet pipe 313 is connected to the input end of the vacuum pump 3. The separator 311 is connected to the inlet pipe 314, and the output end of the inlet pipe 314 is located at the bottom end of the reversing plate 315. The inlet pipe 314 is connected to the vacuum pipe 36, and the input end of the vacuum pipe 36 is connected to the second pressure-bearing housing 13. The outlet pipe 313 is used to send dry air into the vacuum pump 3, and the inlet pipe 314 and the vacuum pipe 36 are used to send air from the second pressure-bearing housing 13 into the separator 311.A first drain pipe 312 is conductively fixed to the lower surface of the separator 311. A first solenoid valve 32 is conductively fixed to the first drain pipe 312. A water collection tank 33 is conductively fixed to the output end of the first solenoid valve 32 and is fixedly connected to the first housing 1. A second solenoid valve 34 is conductively fixed to the output end of the water collection tank 33 and a second drain pipe 35 is conductively fixed to the output end of the second solenoid valve 34 and is fixedly connected to the second housing 16. The first drain pipe 312 is used to send water from the separator 311 into the water collection tank 33. The first solenoid valve 32 is used to control the opening and closing of the first drain pipe 312, and the second solenoid valve 34 is used to control the opening and closing of the second drain pipe 35. The first housing 16 is used to discharge water from the water collection tank 33 onto the second housing 16. A motor 5 is fixedly connected to the first housing 1, and a rotating shaft 51 is fixedly connected to the output end of the motor 5. A fan 52 is fixedly connected to the rotating shaft 51, and the fan 52 is located inside the second pressure-bearing housing 13. A door 14 is hinged to the first housing 1, and an observation window 15 is provided on the door 14. The motor 5 drives the rotating shaft 51, which in turn drives the fan 52. The fan 52 propels the airflow within the second pressure-bearing housing 13, forming a circulating airflow to ensure uniform mixing of the air within the second pressure-bearing housing 13. The door 14 is used to close the first housing 1, and the observation window 15 facilitates observation of the interior of the second pressure-bearing housing 13. The second housing 16... A humidifier 4 is fixedly connected inside the housing. The output of the humidifier 4 is connected to a third solenoid valve 41. The output of the third solenoid valve 41 is connected to a moisture delivery pipeline 42, which is also connected to the second pressure-bearing housing 13. The humidifier 4 generates moisture, and the third solenoid valve 41 controls the opening and closing of the moisture delivery pipeline 42, which delivers moisture into the second pressure-bearing housing 13. A compressor 6 is fixedly connected inside the second housing 16. The output of the compressor 6 is connected to a condenser 61, and the output of the condenser 61 is connected to an evaporator 62. The evaporator 62 is fixedly connected to the second pressure-bearing housing 13, and its output is connected to the compressor 6. At the input end, compressor 6 is used to compress the refrigerant, condenser 61 is used for refrigerant condensation and heat dissipation, and evaporator 62 is used for refrigerant evaporation and heat absorption. A heat dissipation vent 17 is provided on the second housing 16 at the position corresponding to the condenser 61, for ventilation and heat dissipation of the condenser 61. A heater 7 is fixedly connected inside the second pressure-bearing housing 13, for heating the interior of the second pressure-bearing housing 13. A control panel 2 is fixedly connected to the second housing 16, and the control panel 2 is electrically connected to the vacuum pump 3, the first solenoid valve 32, the second solenoid valve 34, the humidifier 4, the third solenoid valve 41, the motor 5, the compressor 6, and the heater 7. The control panel 2 is used to control the operation of the equipment.

[0023] Working principle: When using this invention, start the vacuum pump 3, the first solenoid valve 32, the refrigeration pipe 3111, the humidifier 4, and the third solenoid valve 41. The moisture generated by the humidifier 4 is sent into the second pressure-bearing housing 13 through the moisture delivery pipe 42. The air in the second pressure-bearing housing 13 enters the air inlet pipe 314 through the vacuum pipe 36. Due to the obstruction of the reversing plate 315 and the reversing pipe 316, a swirling flow is formed in the separation tank 311. The water vapor in the air is thrown towards the tank wall of the separation tank 311 under the action of centrifugal force, flows along the tank wall into the first drain pipe 312, and enters the water collection tank 33 through the first solenoid valve 32. In the receiving cavity 3110, the refrigeration pipe 3111 refrigerates... At the bottom, the separator 311 is in a low-temperature state, which promotes the condensation of water vapor into large droplets, improving the separation efficiency. Air enters the air outlet 317 and is sent into the space at the top of the reversing plate 315 through the gap between the first baffle 318 and the second baffle 319. Then, it enters the vacuum pump 3 through the air outlet pipe 313 and is discharged from the second housing 16 by the vacuum pump 3. When the water level in the water collection tank 33 reaches the set value, the first solenoid valve 32 closes and the second solenoid valve 34 opens, so that the water in the water collection tank 33 is discharged from the second housing 16 through the second drain pipe 35. Then, the second solenoid valve 34 closes and the first solenoid valve 32 opens, and the water collection tank 33 continues to collect water. Among them, the refrigeration pipe 31 11 can employ either evaporator 62 or water-cooled refrigeration. Both evaporator 62 refrigeration and water-cooled refrigeration are existing technologies, so their refrigeration principles will not be elaborated further. The first pressure-bearing housing 11 and the second pressure-bearing housing 13 are used to improve the pressure-bearing capacity of the first housing 1. The door 14 is used to seal the first housing 1. The insulation layer 12 is used for insulation. The observation window 15 is used to facilitate observation of the interior of the second pressure-bearing housing 13. The second housing 16 is the equipment room. The control panel 2 is used to control the operation of the equipment. The motor 5 is used to drive the rotating shaft 51. The rotating shaft 51 drives the impeller 52. The impeller 52 is used to push the air flow inside the second pressure-bearing housing 13 to form a circulating airflow. The air inside the second pressure-bearing housing 13 is mixed evenly. The refrigerant inside the evaporator 62 evaporates under low pressure, absorbing heat from the surrounding air, thereby achieving the effect of cooling the inside of the second pressure-bearing housing 13. After evaporation, the refrigerant changes from liquid to gas. The compressor 6 draws in the low-temperature, low-pressure gaseous refrigerant from the evaporator 62 and compresses it, increasing its pressure and temperature, turning it into a high-temperature, high-pressure gaseous refrigerant. This creates conditions for the liquefaction of the refrigerant in the condenser 61. The condenser 61 is used for heat dissipation of the refrigerant, the heat dissipation port 17 is used for ventilation and heat dissipation of the condenser 61, and the heater 7 is used to heat the inside of the second pressure-bearing housing 13.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A low-pressure humidity test chamber comprising a first housing (1), characterized in that: A second housing (16) is fixedly connected to the first housing (1). A vacuum pump (3) is fixedly connected inside the second housing (16). A water vapor separation component (31) is connected to the input end of the vacuum pump (3). The water vapor separation component (31) includes a separation tank (311). A reversing plate (315) is fixedly connected inside the separation tank (311). A reversing pipe (316) is fixedly connected through the reversing plate (315). An air outlet (317) is opened on the reversing pipe (316). Multiple first baffles (318) are evenly distributed on one side of the inner wall of the air outlet (317), and multiple second baffles (319) are evenly distributed on the other side of the inner wall. The second baffles (319) and the first baffles (318) are spaced apart. A receiving cavity (3110) is opened on the reversing pipe (316). A refrigeration pipe (3111) is fixedly connected inside the receiving cavity (3110).

2. The low pressure humidity test chamber of claim 1, wherein: A first pressure-bearing shell (11) is fixedly connected inside the first housing (1), an insulation layer (12) is fixedly connected inside the first pressure-bearing shell (11), a second pressure-bearing shell (13) is fixedly connected inside the insulation layer (12), and the input end of the water vapor separation component (31) is conductively connected inside the second pressure-bearing shell (13).

3. The low pressure humidity test chamber of claim 1, wherein: An outlet pipe (313) is fixedly connected to the separator (311), and the input end of the outlet pipe (313) is located at the top of the reversing plate (315). The output end of the outlet pipe (313) is connected to the input end of the vacuum pump (3). An inlet pipe (314) is fixedly connected to the separator (311), and the output end of the inlet pipe (314) is located at the bottom of the reversing plate (315). A vacuum tube (36) is fixedly connected to the input end of the inlet pipe (314), and the input end of the vacuum tube (36) is connected to the inside of the second pressure-bearing shell (13).

4. A low pressure humidity test chamber as claimed in claim 3, wherein: The lower surface of the separator (311) is connected to a first drain pipe (312), and a first solenoid valve (32) is connected to the first drain pipe (312). The output end of the first solenoid valve (32) is connected to a water collection tank (33), and the water collection tank (33) is fixedly connected to the first housing (1). The output end of the water collection tank (33) is connected to a second solenoid valve (34), and the output end of the second solenoid valve (34) is connected to a second drain pipe (35), and the second drain pipe (35) is fixedly connected to the second housing (16).

5. A low pressure humidity test chamber as claimed in claim 4, wherein: A motor (5) is fixedly connected to the first housing (1), a rotating shaft (51) is fixedly connected to the output end of the motor (5), a fan (52) is fixedly connected to the rotating shaft (51), and the fan (52) is located inside the second pressure-bearing housing (13). A door (14) is hinged to the first housing (1), and an observation window (15) is provided on the door (14).

6. The low pressure humidity test chamber of claim 1, wherein: A humidifier (4) is fixedly connected inside the second housing (16). The output end of the humidifier (4) is connected to a third solenoid valve (41). The output end of the third solenoid valve (41) is connected to a moisture delivery pipeline (42), and the moisture delivery pipeline (42) is connected to the second pressure-bearing housing (13).

7. A low pressure humidity test chamber as claimed in claim 6, characterised in that: A compressor (6) is fixedly connected inside the second housing (16). A condenser (61) is connected to the output end of the compressor (6). An evaporator (62) is connected to the output end of the condenser (61). The evaporator (62) is fixedly connected inside the second pressure-bearing housing (13). The output end of the evaporator (62) is connected to the input end of the compressor (6).

8. A low pressure humidity test chamber as claimed in claim 7, characterised in that: A heat dissipation vent (17) is provided on the second housing (16) at the position corresponding to the condenser (61).

9. The low pressure humidity test chamber of claim 7, wherein: A heater (7) is fixedly connected inside the second pressure-bearing housing (13).

10. The low pressure humidity test chamber of claim 8, wherein: The second housing (16) is fixedly connected to a control panel (2), and the control panel (2) is electrically connected to the vacuum pump (3), the first solenoid valve (32), the second solenoid valve (34), the humidifier (4), the third solenoid valve (41), the motor (5), the compressor (6) and the heater (7).

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