Dehumidifier

Abstract

The dehumidifier comprises a base, an anode tab, a membrane electrode, a cathode tab, an annular sealing gasket and an annular gland, a step hole penetrating through the upper end face and the lower end face of the base is formed in the base, and the anode tab, the membrane electrode, the cathode tab and the annular sealing gasket are sequentially stacked in the step hole and pressed on the step face of the step hole through the annular gland. The dehumidifier is simple and compact in structure, capable of actively discharging water vapor to prevent the condensation phenomenon, and high in dehumidification efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to equipment dehumidification technical field, especially a kind of dehumidifier. BACKGROUND

[0002] During the use of the sealed electronic device, the internal temperature of the device or the external environmental pressure may change, in order to prevent the product from being damaged and to prolong the service life of the product, a vent hole is usually provided in the shell of the device for "breathing". For the sealed shell that needs to meet certain protection level, a back adhesive type air-permeable film, a welding type air-permeable film or an air-permeable valve is usually used to seal the vent hole, so that the air-permeable property of the shell is ensured and the protection level of the shell can meet the specific use requirements.

[0003] The back adhesive type air-permeable film, the welding type air-permeable film and the air-permeable valve can effectively balance the internal and external pressure difference of the sealed shell and reduce the occurrence of condensation. The main principle is that when the electronic device is cooled, the negative pressure generated due to the temperature reduction can be effectively compensated by the waterproof air-permeable product, so that the internal and external pressures of the sealed shell are always balanced, and the water vapor in the external environment cannot be absorbed by the negative pressure formed by the system. This method of reducing condensation is a passive process that depends on the environmental conditions and the internal conditions of the shell. It mainly controls the internal and external pressure difference of the shell to reduce the entry of water vapor into the shell as much as possible, and belongs to passive elimination of water vapor.

[0004] When the temperature of the system reaches the room temperature, the entire electronic device is in a natural balanced state, i.e., the temperature, humidity and pressure inside and outside the shell are balanced. When the humidity in the external environment is too high, such as in a humid basement, in the plum rain season or on a rainy day, the humidity inside the sealed electronic device in such an environment will reach a balanced state with the humidity in the external environment. If the humidity is condensed, the water droplets generated may damage the circuit board of the electronic device. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a dehumidifier that actively discharges water vapor to prevent condensation.

[0006] To achieve the above-mentioned purpose, the technical solution provided by the utility model is as follows:

[0007] A dehumidifier includes a base, an anode tab, a membrane electrode, a cathode tab, an annular gasket and an annular gland. The base is provided with a stepped hole that penetrates the upper and lower end faces of the base. The anode tab, the membrane electrode, the cathode tab and the annular gasket are sequentially stacked in the stepped hole, and the annular gland is pressed against the stepped surface of the stepped hole.

[0008] Preferably, the base is provided with a first limiting groove and a second limiting groove on the wall of the stepped hole, which extend through the upper and lower end faces of the base. The anode tab includes an anode conductive ring and an anode lead extending outward from one side of the anode conductive ring and bent downward, the anode conductive ring is stacked on the stepped surface of the stepped hole, and the anode lead is limitedly fitted in the first limiting groove and extends downward out of the base. The cathode tab includes a cathode conductive ring and a cathode lead extending outward from one side of the cathode conductive ring and bent downward, the cathode conductive ring is stacked on the membrane electrode, and the cathode lead is limitedly fitted in the second limiting groove and extends downward out of the base.

[0009] Preferably, the anode tab further includes an anode conductive mesh connected in the anode conductive ring and flush with the end face of the anode conductive ring facing the membrane electrode. The cathode tab further includes a cathode conductive mesh connected in the cathode conductive ring and flush with the end face of the cathode conductive ring facing the membrane electrode.

[0010] Preferably, the annular gland includes an annular cover plate covering the upper end face of the base and a compression ring connected to the lower end face of the annular cover plate, the compression ring is inserted into the stepped hole and pressed against the annular gasket.

[0011] Preferably, the compression ring is in interference fit or threaded fit with the stepped hole.

[0012] Preferably, the outer side wall of the base is provided with external threads.

[0013] Preferably, a sealing ring is sleeved on the base and abuts against the lower end face of the annular cover plate.

[0014] Preferably, the edge profile of the annular cover plate is non-circular.

[0015] Preferably, the membrane electrode includes an anode catalyst layer, an anode diffusion layer, a proton exchange membrane, a cathode catalyst layer, and a cathode diffusion layer, the anode diffusion layer is in a mesh structure, the anode diffusion layer is compounded on the side of the proton exchange membrane facing the anode tab, the anode catalyst layer penetrates into the mesh holes of the anode diffusion layer and is bonded with the proton exchange membrane, the cathode catalyst layer is compounded on the side of the proton exchange membrane facing the cathode tab, and the cathode diffusion layer is compounded on the side of the cathode catalyst layer away from the proton exchange membrane.

[0016] Preferably, the anode catalyst layer is formed by ultrasonic spraying or transfer printing of anode catalyst on the side of the anode diffusion layer away from the proton exchange membrane, and the loading amount of the anode catalyst is 0.25-10 mg / cm 2 .

[0017] Preferably, the cathode catalyst layer is formed by ultrasonic spraying or transfer printing of a cathode catalyst to the side of the proton exchange membrane facing the cathode diffusion layer or the side of the cathode diffusion layer facing the proton exchange membrane, and the loading of the cathode catalyst is 0.5-10 mg / cm 2 .

[0018] Preferably, the thickness of the anode diffusion layer is 0.05-0.3 mm, and the open porosity is greater than 80%.

[0019] Preferably, the thickness of the cathode diffusion layer is 0.05-0.3 mm.

[0020] Preferably, the anode catalyst is any one of iridium, iridium oxide, platinum, platinum oxide, ruthenium, and ruthenium dioxide.

[0021] Preferably, the cathode catalyst is any one of platinum black, carbon-supported platinum, iridium, and carbon-supported iridium.

[0022] Preferably, the anode diffusion layer is any one of a wire mesh, a flat mesh, and a diamond mesh, and the material of the anode diffusion layer is any one of pure titanium, a titanium alloy, pure titanium coated with a coating of a noble metal or an oxide thereof, and a titanium alloy coated with a coating of a noble metal or an oxide thereof.

[0023] Preferably, the cathode diffusion layer is any one of carbon paper, carbon cloth, and metal felt.

[0024] Preferably, the material of the anode tab is any one of pure titanium, stainless steel coated with titanium, pure titanium coated with a coating of a noble metal or an oxide thereof, and a titanium alloy.

[0025] Preferably, the material of the cathode tab is any one of stainless steel, pure titanium, a titanium alloy, stainless steel coated with platinum, aluminum, and an aluminum alloy.

[0026] With the above technical solution, the dehumidifier has the advantages of simple and compact structure and high dehumidification efficiency. The dehumidifier actively dehumidifies by using the electrolytic dehumidification principle. Direct current is applied to the anode tab and the cathode tab, so that the anode catalyst layer decomposes water vapor in the equipment into hydrogen ions and oxygen. The hydrogen ions migrate from the anode side of the proton exchange membrane to the cathode side and react with oxygen in the air in the cathode catalyst layer to form water vapor, which is discharged out of the equipment, thereby effectively preventing the occurrence of condensation in the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a perspective view of a dehumidifier according to a preferred embodiment of the present application.

[0028] Figure 2 FIG. 2 is an exploded view of the dehumidifier according to the preferred embodiment of the present application. Figure 1 FIG. 3 is an exploded view of the dehumidifier according to the preferred embodiment of the present application.

[0029] Figure 3 For Figure 1 The half cut structure schematic diagram of dehumidifier.

[0030] Figure 4 For Figure 1 The half cut structure schematic diagram of membrane electrode.

[0031] Figure 5 For Figure 2 The bottom view schematic diagram of membrane electrode.

[0032] Figure 6 The explosion structure schematic diagram of dehumidifier of another preferred embodiment of the utility model.

[0033] Wherein: 1, base; 11, step hole; 12, first limit slot; 13, second limit slot; 14, external thread; 2, anode tab; 21, anode conductive ring; 22, anode lead; 23, anode conductive mesh; 3, membrane electrode; 31, anode catalyst layer; 32, anode diffusion layer; 33, proton exchange membrane; 34, cathode catalyst layer; 35, cathode diffusion layer; 4, cathode tab; 41, cathode conductive ring; 42, cathode lead; 43, cathode conductive mesh; 5, annular sealing gasket; 6, annular gland; 61, annular cover plate; 62, compression ring; 7, sealing ring. DETAILED DESCRIPTION

[0034] The utility model will be further described below in combination with the drawings and specific embodiments.

[0035] As Figures 1 to 5 Indicated, the dehumidifier of this embodiment includes base 1, anode tab 2, membrane electrode 3, cathode tab 4, annular sealing gasket 5 and annular gland 6. Wherein, base 1 is provided with step hole 11 through the upper and lower end faces of base 1, and anode tab 2, membrane electrode 3, cathode tab 4 and annular sealing gasket 5 are sequentially stacked in step hole 11 and are compressed on the step surface of step hole 11 by annular gland 6.

[0036] The dehumidifier of this embodiment uses electrolysis dehumidification principle to carry out active dehumidification, and compared with passive dehumidification of waterproof and breathable film, the dehumidifier of this embodiment is not affected by environmental factors such as temperature difference or large air humidity, and has stronger applicability.

[0037] In this embodiment, annular sealing gasket 5 is elastically treated to anode tab 2, membrane electrode 3 and cathode tab 4 to prevent the problem of lamination of anode tab 2, membrane electrode 3 and cathode tab 4 caused by tolerance of annular gland 6, ensure effective contact between anode tab 2, membrane electrode 3 and cathode tab 4, and ensure effective passing of current.

[0038] The membrane electrode 3 of the embodiment includes an anode catalyst layer 31, an anode diffusion layer 32, a proton exchange membrane 33, a cathode catalyst layer 34, and a cathode diffusion layer 35. The anode diffusion layer 32 is in a mesh structure, and is compounded to one side of the proton exchange membrane 33 facing the anode tab 2. The anode catalyst layer 31 penetrates the mesh holes of the anode diffusion layer 32 and is bonded to the proton exchange membrane 33. The cathode catalyst layer 34 is compounded to one side of the proton exchange membrane 33 facing the cathode tab 4. The cathode diffusion layer 35 is compounded to one side of the cathode catalyst layer 34 facing away from the proton exchange membrane 33.

[0039] In the embodiment, the mesh structure of the anode diffusion layer 32 increases the bonding strength between the anode catalyst layer 31 and the proton exchange membrane 33. When the anode catalyst layer 31 is transferred by the transfer printing method, the peeling strength of the anode catalyst layer 31 and the proton exchange membrane 33 and the anode catalyst layer 31 is improved, and the peeling amount of the anode catalyst layer 31 from the transferred film is reduced. When the anode catalyst layer 31 is coated by the coating method, the surface of the anode catalyst layer 31 is prevented from cracking due to the water absorption swelling of the proton exchange membrane 33. On the other hand, the anode catalyst layer 31 can directly contact the moisture in the equipment, increase the contact area between the anode catalyst layer 31 and the anode diffusion layer 32, and improve the electrolysis efficiency. In addition, the mesh structure of the anode diffusion layer 32 also divides the anode catalyst layer 31 into several independent catalytic reaction modules, which is beneficial to improve the uniformity of the overall electrochemical reaction rate of the anode catalyst layer 31.

[0040] The cathode diffusion layer 35 can conduct oxygen in the external air to the cathode catalyst layer 34, and quickly dissipate the water vapor generated by the reaction of the cathode catalyst layer 34 to the external air, thereby improving the electrolysis effect and speed.

[0041] The anode catalyst layer 31 of the embodiment is formed by ultrasonic spraying or transfer printing of an anode catalyst to one side of the anode diffusion layer 32 facing away from the proton exchange membrane 33. The loading amount of the anode catalyst is 0.25-10 mg / cm 2 , wherein the anode catalyst is any one of iridium, iridium oxide, platinum, platinum oxide, ruthenium, and ruthenium dioxide.

[0042] The anode diffusion layer 32 of the embodiment is in a mesh structure, and its thickness is 0.05-0.3 mm. The anode diffusion layer 32 preferably uses any one of a wire mesh, a flat mesh, and a rhombic mesh. The material of the anode diffusion layer 32 is one of pure titanium, titanium alloy, pure titanium plated with a noble metal or an oxide coating of the noble metal, and titanium alloy plated with a noble metal or an oxide coating of the noble metal.

[0043] The cathode catalyst layer 34 of the embodiment is formed by ultrasonic spraying or transfer printing of a cathode catalyst to one side of the proton exchange membrane 33 facing the cathode diffusion layer 35 or one side of the cathode diffusion layer 35 facing the proton exchange membrane 33, and the loading amount of the cathode catalyst is 0.5-10 mg / cm 2 The cathode catalyst is any one of platinum black, carbon-supported platinum, iridium, and carbon-supported iridium.

[0044] The thickness of the cathode diffusion layer 35 of the embodiment is 0.05-0.3 mm, and the open porosity is greater than 80%. The cathode diffusion layer 35 is any one of carbon paper, carbon cloth, and metal felt.

[0045] The material of the anode tab 2 of the embodiment is any one of pure titanium, titanium-plated stainless steel, pure titanium plated with a noble metal or an oxide coating of the noble metal, and a titanium alloy. The material of the cathode tab 4 is any one of stainless steel, pure titanium, a titanium alloy, platinum-plated stainless steel, aluminum, and an aluminum alloy.

[0046] In order to facilitate assembly and wiring and avoid the contact between the anode tab 2 and the cathode tab 4 to affect the electrolysis effect, the anode tab 2 of the embodiment comprises an anode conductive ring 21 and an anode lead 22 extending outward from one side of the anode conductive ring 21 and bent downward. The cathode tab 4 of the embodiment comprises a cathode conductive ring 41 and a cathode lead 42 extending outward from one side of the cathode conductive ring 41 and bent downward. The hole wall of the stepped hole 11 of the base 1 is provided with a first limiting groove 12 and a second limiting groove 13 penetrating the upper and lower end faces of the base 1. The anode conductive ring 21 is stacked on the stepped surface of the stepped hole 11, the anode lead 22 is limitedly fitted in the first limiting groove 12 and extends downward from the first limiting groove 12 out of the base 1, the membrane electrode 3 is stacked on the anode conductive ring 21, the cathode conductive ring 41 is stacked on the membrane electrode 3, the cathode lead 42 is limitedly fitted in the second limiting groove 13 and extends downward from the second limiting groove 13 out of the base 1, and the first limiting groove 12 and the second limiting groove 13 can limit the rotation of the anode tab 2 and the cathode tab 4 relative to the base 1, thereby facilitating the assembly of the dehumidifier and ensuring the dehumidification effect of the dehumidifier.

[0047] In combination Figure 6 In other preferred embodiments of the utility model, the anode tab 2 further comprises an anode conductive mesh 23 connected in the anode conductive ring 21, and one side of the anode conductive mesh 23 facing the membrane electrode 3 is flush with the end surface of the anode conductive ring 21. The cathode tab 4 further comprises a cathode conductive mesh 43 connected in the cathode conductive ring 41, and one side of the cathode conductive mesh 43 facing the membrane electrode 3 is flush with the end surface of the cathode conductive ring 41. The anode conductive mesh 23 and the cathode conductive mesh 43 can support the membrane electrode 3 and increase the surface contact area with the membrane electrode 3, thereby improving the uniformity and reaction rate of the reaction.

[0048] In a feasible option of the embodiment, the annular gland 6 comprises an annular cover plate 61 covering the upper end surface of the base 1 and a pressing ring 62 connected to the lower end surface of the annular cover plate 61, the pressing ring 62 is inserted into the stepped hole 11 and pressed on the annular gasket 5, the pressing ring 62 is in interference fit or threaded fit with the stepped hole 11, which ensures the accuracy and stability of assembly, facilitates assembly and disassembly, and improves the convenience of maintenance. In order to facilitate the disassembly of the annular gland 6, the edge profile of the annular cover plate 61 of the embodiment is non-circular to provide a force point for screwing and disassembling the annular gland 6.

[0049] In order to avoid the entry of external water vapor from the connection between the annular gland 6 and the base 1 into the shell of the electronic equipment, the embodiment is provided with a sealing ring 7 on the base 1, which is in contact with the lower end surface of the annular cover plate 61. After connecting the base 1 of the dehumidifier to the shell of the electronic equipment, the annular cover plate 61 presses the sealing ring 7 against the shell of the electronic equipment, thereby ensuring the airtightness of the shell of the electronic equipment and ensuring the effectiveness of dehumidification.

[0050] In order to facilitate the assembly of the dehumidifier to the shell of the electronic equipment, the embodiment is provided with an external thread 14 on the outer side wall of the base 1, which is in threaded connection with the shell of the electronic equipment.

[0051] The dehumidifier of the embodiment can adjust the humidity in the closed shell of the electronic equipment according to the actual application scene, such as vehicle lamp, lithium battery pack, stage lamp, camera, electronic camera, power cabinet, electrical control cabinet, switch cabinet, etc. which are sensitive to humidity, thereby effectively reducing the generation of condensation.

[0052] Although the utility model is specifically shown and introduced in combination with the preferred embodiment, it should be understood by those skilled in the art that various changes can be made in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all such changes are within the protection scope of the utility model.

Claims

1. A dehumidifier, characterized by, The utility model relates to a dehumidifier, including: Base (1), anode tab (2), membrane electrode (3), cathode tab (4), annular sealing gasket (5) and annular gland (6); The base (1) is provided with a stepped hole (11) penetrating the upper and lower end faces of the base (1), the anode tab (2), the membrane electrode (3), the cathode tab (4) and the annular sealing gasket (5) are sequentially stacked in the stepped hole (11), and the annular gland (6) is tightly pressed on the stepped surface of the stepped hole (11).

2. The dehumidifier of claim 1, wherein, The base (1) is provided with a first limiting groove (12) and a second limiting groove (13) penetrating the upper and lower end faces of the base (1) on the hole wall of the stepped hole (11); The anode tab (2) comprises an anode conductive ring (21) and an anode lead (22) extending outward from one side of the anode conductive ring (21) and bent downward, the anode conductive ring (21) is stacked on the stepped surface of the stepped hole (11), and the anode lead (22) is limitedly fitted in the first limiting groove (12) and extends downward out of the base (1); The cathode tab (4) comprises a cathode conductive ring (41) and a cathode lead (42) extending outward from one side of the cathode conductive ring (41) and bent downward, the cathode conductive ring (41) is stacked on the membrane electrode (3), and the cathode lead (42) is limitedly fitted in the second limiting groove (13) and extends downward out of the base (1).

3. The dehumidifier of claim 2, wherein, The anode tab (2) further comprises an anode conductive mesh (23) connected in the anode conductive ring (21) and flush with the end surface of the anode conductive ring (21) facing the membrane electrode (3), and the cathode tab (4) further comprises a cathode conductive mesh (43) connected in the cathode conductive ring (41) and flush with the end surface of the cathode conductive ring (41) facing the membrane electrode (3).

4. The dehumidifier according to claim 1, wherein The annular gland (6) comprises an annular cover plate (61) covering the upper end face of the base (1) and a pressing ring (62) connected to the lower end face of the annular cover plate (61), the pressing ring (62) is inserted into the stepped hole (11) and tightly presses on the annular sealing gasket (5).

5. The dehumidifier according to claim 4, wherein The pressing ring (62) is in interference fit or threaded fit with the stepped hole (11).

6. The dehumidifier according to claim 4, wherein The outer side wall of the base (1) is provided with external threads (14).

7. The dehumidifier according to claim 4, wherein The base (1) is provided with a sealing ring (7) abutting against the lower end face of the annular cover plate (61), and the edge profile of the annular cover plate (61) is non-circular.

8. The dehumidifier according to claim 4, wherein The membrane electrode (3) comprises an anode catalyst layer (31), an anode diffusion layer (32), a proton exchange membrane (33), a cathode catalyst layer (34) and a cathode diffusion layer (35), the anode diffusion layer (32) is a net structure, the anode diffusion layer (32) is compounded on the side of the proton exchange membrane (33) facing the anode tab (2), the anode catalyst layer (31) penetrates into the mesh holes of the anode diffusion layer (32) and is bonded with the proton exchange membrane (33), the cathode catalyst layer (34) is compounded on the side of the proton exchange membrane (33) facing the cathode tab (4), and the cathode diffusion layer (35) is compounded on the side of the cathode catalyst layer (34) away from the proton exchange membrane (33).

9. The dehumidifier according to claim 8, wherein, The anode catalyst layer (31) is formed by coating an anode catalyst to the side of the anode diffusion layer (32) facing away from the proton exchange membrane (33) by ultrasonic spraying or transfer printing, and the loading of the anode catalyst is 0.25-10 mg / cm 2 ; The cathode catalyst layer (34) is formed by ultrasonic spraying or transfer printing of a cathode catalyst to one side of the proton exchange membrane (33) facing the cathode diffusion layer (35) or one side of the cathode diffusion layer (35) facing the proton exchange membrane (33), the loading of the cathode catalyst being 0.5 to 10 mg / cm 2 ; The thickness of the anode diffusion layer (32) is 0.05-0.3mm, and the opening rate is greater than 80%; The thickness of the cathode diffusion layer (35) is 0.05-0.3mm.

10. The dehumidifier according to claim 9, wherein, The anode catalyst is any one of iridium, iridium oxide, platinum, platinum oxide, ruthenium and ruthenium dioxide; The cathode catalyst is any one of platinum black, carbon-supported platinum, iridium and carbon-supported iridium; The anode diffusion layer (32) is any one of a wire mesh, a flat mesh and a rhombic mesh, and the material of the anode diffusion layer (32) is one of pure titanium, titanium alloy, pure titanium coated with a noble metal or an oxide coating of the noble metal, and titanium alloy coated with a noble metal or an oxide coating of the noble metal; The cathode diffusion layer (35) is any one of carbon paper, carbon cloth and metal felt; The material of the anode tab (2) is any one of pure titanium, stainless steel coated with titanium, pure titanium coated with a noble metal or an oxide coating of the noble metal, and titanium alloy; The material of the cathode tab (4) is any one of stainless steel, pure titanium, titanium alloy, stainless steel coated with platinum, aluminum and aluminum alloy.

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