Humidity and heat test box with dehumidification module

Abstract

The utility model discloses a damp heat test box with a dehumidification module, which comprises a test box body, a refrigerant spraying unit is arranged in the test box body, and the refrigerant spraying unit comprises a spiral nozzle array arranged on the inner side wall of the test box body and a gas-liquid separation device arranged at the bottom of the test box body. The gas-liquid separation device comprises a condensation plate mounted at the bottom of the test box body and an adsorption module arranged below the condensation plate, the tail part of the spiral nozzle array is connected with a liquid storage tank on the outer side through an electronic expansion valve, a refrigerant is stored in the liquid storage tank, and a humidity sensor is mounted in the test box body; and the microprocessor is electrically connected with a control module of the electronic expansion valve. A refrigerant is sprayed into the test box body through the spiral nozzle array, moisture in air is condensed by utilizing instantaneous vaporization heat absorption of the refrigerant, the gas-liquid separation device absorbs liquid water through an adsorption material and recovers the non-vaporized refrigerant, the non-vaporized refrigerant flows back to the liquid storage tank through the booster pump to be recycled, an evaporator structure is not needed, the consumption of the refrigerant is reduced, and the cost is reduced. And the dehumidification efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of test chamber technology, and in particular to a damp heat test chamber with a dehumidification module. Background Technology

[0002] High and low temperature alternating humidity and heat test chambers are widely used testing equipment in fields such as national defense, aerospace, automotive, electronics, electrical appliances, instrumentation, materials, chemicals, food, and pharmaceuticals. They are used by users to conduct corresponding high and low temperature gradual change tests, humidity and heat tests, cold and high temperature resistance tests on complete machines (or components), electrical appliances, instruments, materials, coatings, and platings. They are used to analyze and evaluate the performance and adaptability of samples under specific environmental conditions. They are an indispensable and important testing equipment in scientific research and production processes. According to relevant surveys and statistics, high and low temperature humidity and heat test chambers are one of the most widely used environmental testing equipment.

[0003] Traditional test chambers mainly rely on compressors for refrigeration and dehumidification. The evaporator surface is prone to frost formation, and frequent defrosting is required under low-temperature conditions. Humidity control response is lagging, and dehumidification efficiency is low. Utility Model Content

[0004] To address the aforementioned technical problems, a damp heat test chamber with a dehumidification module is provided.

[0005] To achieve the above objectives, this utility model discloses a humidity and heat test chamber with a dehumidification module, comprising a test chamber body, wherein a refrigerant spraying unit is provided inside the test chamber body, the refrigerant spraying unit includes a spiral nozzle array installed on the inner side wall of the test chamber body and a gas-liquid separation device installed at the bottom of the test chamber body, the gas-liquid separation device includes a condenser plate installed at the bottom of the test chamber body and an adsorption module installed below the condenser plate, the tail end of the spiral nozzle array is connected to an outer liquid storage tank through an electronic expansion valve, the liquid storage tank stores refrigerant, and a humidity sensor is installed inside the test chamber body, and is electrically connected to the control module of the electronic expansion valve through a microprocessor.

[0006] Furthermore, the nozzle orifice diameter of the spiral nozzle array ranges from 0.1mm to 0.3mm, the nozzle spacing is 50mm, and the nozzles in relative positions are arranged in a 60° cross-spray layout.

[0007] Furthermore, the condenser plate has an inclination angle of 15°, and a support column is provided between the corresponding position of the condenser plate on each wall of the test chamber and the bottom of the test chamber. The bottom of each condenser plate is connected to the liquid collection hole, and the bottom of the liquid collection hole is embedded in the adsorption module. A horizontal installation reference surface is provided inside the test chamber.

[0008] Furthermore, the condenser plate has a hydrophobic coating on the upper half of the mounting reference surface and a hydrophilic coating on the lower half of the mounting reference surface.

[0009] Furthermore, the contact angle of the hydrophobic coating is ≥150°, and the contact angle of the hydrophilic coating is ≤10°.

[0010] Furthermore, the adsorption module includes a housing and at least two sets of adsorption mesh plates inserted laterally into the housing. The adsorption mesh plates adopt a molecular sieve structure. A booster pump is connected to the bottom of the adsorption module, and the booster pump is connected to the storage tank through a hose to form a closed loop.

[0011] Furthermore, a filter is installed between the liquid storage tank and the electronic expansion valve, and a pressure sensor is installed on the electronic expansion valve.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a damp heat test chamber with a dehumidification module. The refrigerant is sprayed into the test chamber through a spiral nozzle array. The instantaneous vaporization of the refrigerant absorbs heat and causes the moisture in the air to condense. The gas-liquid separation device absorbs the liquid water through an adsorption material and recovers the unvaporized refrigerant. The refrigerant is then returned to the storage tank for recycling via a booster pump. This eliminates the need for an evaporator structure, reduces refrigerant consumption, and improves dehumidification efficiency. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0015] Figure 2 This utility model Figure 1 A magnified view of a portion of point A in the middle.

[0016] In the figure: 1 is the test chamber; 2 is the spiral nozzle array; 21 is the nozzle; 22 is the electronic expansion valve; 23 is the pressure sensor; 3 is the gas-liquid separation device; 31 is the condenser plate; 311 is the support column; 312 is the liquid collection hole; 313 is the hydrophobic coating; 314 is the hydrophilic coating; 4 is the booster pump; 5 is the liquid storage tank; 6 is the filter; 7 is the humidity sensor. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] One embodiment of this utility model is as follows: Figure 1 and Figure 2As shown, a refrigerant spraying unit is installed inside the test chamber 1. The refrigerant spraying unit includes a spiral nozzle array 2 installed on the inner wall of the test chamber 1 and a gas-liquid separation device 3 installed at the bottom of the test chamber 1. Preferably, a micro fan is installed on the inner wall of the test chamber to drive the air flow inside the chamber. The gas-liquid separation device 3 includes a condenser plate 31 installed at the bottom of the test chamber 1 and an adsorption module 32 installed below the condenser plate 31. The tail of the spiral nozzle array 2 is connected to the outer liquid storage tank 5 through an electronic expansion valve 22. The liquid storage tank 5 stores refrigerant. In this embodiment, the refrigerant is preferably environmentally friendly R513A refrigerant, which is a non-flammable and environmentally friendly refrigerant with excellent refrigeration performance. It is suitable for various commercial and industrial refrigeration equipment. It is a mixture of R1234yf and R134a refrigerants and has similar performance and characteristics to R134a. The critical value of R513A refrigerant is... The temperature is 25.9℃, the critical pressure is 29.8 bar, and the ozone depletion potential (ODP) of R513A refrigerant is 0. It also has a low global warming potential (GWP), which meets international environmental protection standards. It is a colorless gas at normal temperature and pressure and is non-flammable, ensuring safety during storage and use. The test chamber 1 is equipped with a humidity sensor 7, which is electrically connected to the control module of the electronic expansion valve 22 through a microprocessor. The humidity sensor and the electronic expansion valve are linked to dynamically adjust the refrigerant spray volume according to the set humidity value. This application sprays refrigerant into the test chamber through a spiral nozzle array. The instantaneous vaporization of the refrigerant absorbs heat, causing the moisture in the air to condense. The gas-liquid separation device absorbs the liquid water through adsorption material and recovers the unvaporized refrigerant. It is then returned to the storage tank for recycling through a booster pump. There is no need for an evaporator structure, which reduces refrigerant consumption and improves dehumidification efficiency.

[0019] In a preferred embodiment of this application, the nozzle 21 of the spiral nozzle array 2 has an orifice diameter of 0.2 mm, a nozzle spacing of 50 mm, and the nozzles 21 in relative positions are arranged in a 60° cross-spray layout.

[0020] like Figure 2 As shown, the inclination angle of the condenser plate 31 is 15°. Support columns 311 are provided between the corresponding positions of the condenser plate 31 on each wall of the test chamber 1 and the bottom of the test chamber 1. The bottom of each condenser plate 31 is connected to the liquid collection hole 312. The bottom of the liquid collection hole 312 is embedded in the adsorption module 32. A horizontal mounting reference surface is provided inside the test chamber 1.

[0021] The condenser plate 31 has a hydrophobic coating 313 on the upper half of the mounting reference surface and a hydrophilic coating 314 on the lower half of the mounting reference surface, forming a hydrophobic-hydrophilic composite coating. The contact angle of the hydrophobic coating 313 is ≥150° and the contact angle of the hydrophilic coating 314 is ≤10°. The hydrophobic coating reduces frost formation and improves dehumidification efficiency.

[0022] The adsorption module 32 includes a housing 321 and at least two sets of adsorption mesh plates 322 that are horizontally inserted and installed in the housing 321. The adsorption mesh plates 322 adopt a molecular sieve structure. Due to the different adsorption capacities of the molecular sieve for water and refrigerant R513A, the mixture is passed through the adsorption mesh plates, which separates the water and refrigerant R513A. The inserted adsorption mesh plates are easy to replace at regular intervals. A booster pump 4 is connected to the bottom of the adsorption module 32. The booster pump 4 is connected to the liquid storage tank 5 through a hose to form a closed loop to recover unvaporized refrigerant.

[0023] A filter 6 is installed between the liquid storage tank 5 and the electronic expansion valve 22. A pressure sensor 23 is installed on the electronic expansion valve 22 to monitor the working pressure of the refrigerant in real time and keep it between 0.8MPa and 1.2MPa. As is common knowledge in this field, the liquid storage tank is equipped with a refrigeration system consisting of a compressor and the like.

[0024] The working principle of this embodiment is as follows: When the humidity sensor inside the test chamber detects that the current humidity is greater than the set value + 0.5%RH, it determines that dehumidification is required. The microprocessor controls the electronic expansion valve to increase the valve core opening. The refrigerant in the storage tank is filtered by the filter and enters the spiral nozzle array from the electronic expansion valve to spray the interior of the test chamber in all directions. The refrigerant vaporizes instantly, causing the moisture in the air to condense and fall onto the condensation plate below. The mixture of liquid water and unvaporized refrigerant enters the adsorption module from the liquid collection hole. The liquid water is adsorbed by two layers of adsorption mesh plates. The refrigerant with the filtered liquid water is returned to the storage tank by the booster pump to achieve recycling. The evaporator structure is eliminated, the dehumidification response speed is improved, and the nozzle array can achieve humidity split control.

[0025] Several points need to be clarified: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal connections between two components, or direct connections. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and the relative positional relationships may change when the absolute position of the described objects changes. Second, in this document, relational terms such as "first" and "second" are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities.

[0026] The examples above are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A humidity and heat test chamber with a dehumidification module, comprising a test chamber body (1), characterized in that, The test chamber (1) is equipped with a refrigerant spraying unit. The refrigerant spraying unit includes a spiral nozzle array (2) installed on the inner side wall of the test chamber (1) and a gas-liquid separation device (3) installed at the bottom of the test chamber (1). The gas-liquid separation device (3) includes a condenser plate (31) installed at the bottom of the test chamber (1) and an adsorption module (32) installed below the condenser plate (31). The tail of the spiral nozzle array (2) is connected to the outer liquid storage tank (5) through an electronic expansion valve (22). The liquid storage tank (5) stores refrigerant. A humidity sensor (7) is installed in the test chamber (1) and is electrically connected to the control module of the electronic expansion valve (22) through a microprocessor.

2. A humidity test chamber with a dehumidification module according to claim 1, characterized in that, The nozzle (21) of the spiral nozzle array (2) has a nozzle (21) orifice diameter range of 0.1mm to 0.3mm, a nozzle (21) spacing of 50mm, and the nozzles (21) in relative positions are arranged in a 60° cross-spray layout.

3. A humidity test chamber with a dehumidification module according to claim 1, characterized in that, The condenser plate (31) has an inclination angle of 15°. A support column (311) is provided between the condenser plate (31) at the corresponding position on each wall of the test chamber (1) and the bottom of the test chamber (1). The bottom of each condenser plate (31) is connected to the liquid collection hole (312). The bottom of the liquid collection hole (312) is embedded in the adsorption module (32). A horizontal installation reference surface is provided inside the test chamber (1).

4. A humidity test chamber with a dehumidification module according to claim 3, characterized in that, The condenser plate (31) has a hydrophobic coating (313) on the upper half of the mounting reference surface and a hydrophilic coating (314) on the lower half of the mounting reference surface.

5. A humidity and heat test chamber with a dehumidification module according to claim 4, characterized in that, The contact angle of the hydrophobic coating (313) is ≥150°, and the contact angle of the hydrophilic coating (314) is ≤10°.

6. A damp heat test chamber with a dehumidification module according to claim 1, characterized in that, The adsorption module (32) includes a housing (321) and at least two sets of adsorption mesh plates (322) that are horizontally inserted and installed in the housing (321). The adsorption mesh plates (322) adopt a molecular sieve structure. A booster pump (4) is connected to the bottom of the adsorption module (32). The booster pump (4) is connected to the storage tank (5) through a hose to form a closed loop.

7. A damp heat test chamber with a dehumidification module according to claim 1, characterized in that, A filter (6) is provided between the liquid storage tank (5) and the electronic expansion valve (22), and a pressure sensor (23) is installed on the electronic expansion valve (22).

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