Evaporator, air conditioner indoor unit and air conditioner

Abstract

The invention discloses an evaporator, an air conditioner indoor unit and an air conditioner. The evaporator comprises a metal heat exchange tube and a first electrode. An electric connecting part is arranged on the metal heat exchange tube, and the electric connecting part is used for applying a first potential; the first electrode is adjacent to the metal heat exchange tube and is electrically connected with the metal heat exchange tube by making contact with the corrosion medium, the first electrode is used for applying a second potential, and the second potential is higher than the first potential. Therefore, the applied second potential is higher than the first potential, so that the first electrode becomes the anode, and the whole metal heat exchange tube becomes the cathode, the electron loss of the metal heat exchange tube is reduced, the oxidation reaction of the metal heat exchange tube is prevented, and the metal heat exchange tube is effectively prevented from being corroded.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an evaporator, an air conditioning indoor unit and an air conditioner. Background Art

[0002] In recent years, more and more air conditioners are used in homes and work environments. According to research, when air conditioners are actually used for cooling, a large amount of liquid film will be generated on the surface of the evaporator due to condensation. The evaporator is usually designed with copper tubes, and the pipes of the evaporator are exposed to the air. Various particles and dust in the air will dissolve in the liquid film formed on the surface of the evaporator pipes, so that the liquid film and the substrate of the evaporator itself form a loop, forming electrochemical corrosion. Therefore, after long-term use of the air conditioner, the pipes of the evaporator are prone to corrosion, affecting the cooling effect of the air conditioner. Severe corrosion will cause the evaporator pipes to rupture and shorten the service life of the air conditioner. Summary of the invention

[0003] The embodiment of the present invention provides an evaporator, an air conditioner indoor unit and an air conditioner, which solves the problem that the pipeline of the air conditioner evaporator is prone to corrosion.

[0004] In a first aspect, an embodiment of the present invention provides an evaporator, comprising:

[0005] A metal heat exchange tube, on which an electrical connection portion is provided, wherein the electrical connection portion is used to apply a first potential;

[0006] The first electrode is disposed adjacent to the metal heat exchange tube and is electrically connected to the metal heat exchange tube by contacting the corrosive medium. The first electrode is used to apply a second potential, wherein the second potential is higher than the first potential.

[0007] In the evaporator provided in the embodiment of the present invention, the metal heat exchange tube has a first end and a second end that are far away from each other, the first electrode is adjacent to the first end of the metal heat exchange tube, and the electrical connection portion is provided at the second end of the metal heat exchange tube.

[0008] In the evaporator provided in the embodiment of the present invention, the evaporator further comprises an angle frame, the angle frame is arranged at the first end of the metal heat exchange tube, a drainage surface is formed on the inner side of the angle frame, and the first electrode is arranged on the drainage surface.

[0009] In the evaporator provided in the embodiment of the present invention, a mounting hole is provided on the guide surface, a bent pipe section is formed at the first end of the metal heat exchange tube, and the bent pipe section is passed through the mounting hole.

[0010] In the evaporator provided in the embodiment of the present invention, a plurality of mounting holes are provided, and the plurality of mounting holes are spaced apart on the drainage surface. A guide groove is formed on the drainage surface, and the guide groove is connected to at least two of the mounting holes.

[0011] In the evaporator provided by the embodiment of the present invention, the outer edge of the mounting hole is recessed inward to form a liquid collecting groove, and the guide groove is connected to the liquid collecting groove.

[0012] In the evaporator provided by the embodiment of the present invention, the electrical connection part is a copper wire.

[0013] In a second aspect, an embodiment of the present invention provides an air-conditioning indoor unit, which includes a power module and the evaporator described in the first aspect above, the power module is provided with a first connection end and a second connection end, the first connection end is connected to the electrical connection part, and the second connection end is connected to the first electrode, wherein the power module is used to generate the first potential and the second potential at the first connection end and the second connection end respectively.

[0014] In the air conditioner indoor unit provided in an embodiment of the present invention, the air conditioner indoor unit further includes a potential regulating module, which is connected to the power module, wherein the potential regulating module is used to regulate the magnitude of the first potential and the second potential.

[0015] In a third aspect, an embodiment of the present invention provides an air conditioner, which includes the air conditioner indoor unit described in the second aspect.

[0016] The embodiment of the present invention provides an evaporator, an air conditioner indoor unit and an air conditioner, wherein the evaporator includes a metal heat exchange tube and a first electrode; the metal heat exchange tube is provided with an electrical connection portion thereon, and the electrical connection portion is used to apply a first potential; the first electrode is arranged adjacent to the metal heat exchange tube and establishes an electrical connection with the metal heat exchange tube by contacting a corrosive medium, and the first electrode is used to apply a second potential, wherein the second potential is higher than the first potential. The evaporator provided in the embodiment of the present application is provided with an electrical connection portion on the metal heat exchange tube for applying a first potential, and a first electrode is provided adjacent to the metal heat exchange tube for applying a second potential, the first electrode establishes an electrical connection with the metal heat exchange tube by contacting a corrosive medium, and the second potential applied is higher than the first potential, so that the first electrode becomes an anode and the metal heat exchange tube as a whole becomes a cathode, thereby reducing the electron loss of the metal heat exchange tube, preventing the metal heat exchange tube from undergoing an oxidation reaction, and effectively avoiding the metal heat exchange tube from being corroded. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0018] Figure 1 An exploded view of an evaporator provided in an embodiment of the present invention;

[0019] Figure 2 A side view of an evaporator provided by an embodiment of the present invention;

[0020] Figure 3 A structural diagram of an evaporator provided in an embodiment of the present invention;

[0021] Figure 4 Evaporator provided by the embodiment of the present invention Figure 1 Structural diagram;

[0022] Figure 5 for Figure 4 A magnified view of part A;

[0023] Figure 6 for Figure 4 A magnified view of part B;

[0024] Figure 7 A three-dimensional view of an angle frame of an evaporator provided by an embodiment of the present invention;

[0025] Figure 8 A top view of an angle frame of an evaporator provided by an embodiment of the present invention;

[0026] Fig. 9 for Figure 7 A magnified view of part A;

[0027] Fig.10 for Figure 8 A magnified view of part B;

[0028] Fig.11 A side cross-sectional view of an angle frame of an evaporator provided by an embodiment of the present invention;

[0029] The reference numerals in the figures are:

[0030] 10. Metal heat exchange tube; 101. First end; 102. Second end; 11. Electrical connection portion; 12. Bent tube section; 20. First electrode; 30. Angle frame; 301. Drainage surface; 31. Mounting hole; 310. Liquid collecting tank; 32. Guide tank. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, but are not used to limit the present invention. In addition, in the drawings, structures with similar or identical structures are represented by the same reference numerals.

[0033] Reference Figures 1 to 5 , which shows an embodiment of the evaporator provided by the present invention. The structure and working principle of the evaporator are described in detail below in conjunction with the drawings of the specification. The evaporator comprises a metal heat exchange tube 10 and a first electrode 20; the metal heat exchange tube 10 is provided with an electrical connection portion 11, and the electrical connection portion 11 is used to apply a first potential; the first electrode 20 is arranged adjacent to the metal heat exchange tube 10 and is electrically connected to the metal heat exchange tube 10 by contacting a corrosive medium, and the first electrode 20 is used to apply a second potential, wherein the second potential is higher than the first potential.

[0034] In specific implementation, the evaporator is mainly installed inside the air conditioner to exchange heat to achieve refrigeration. The evaporator of this embodiment is mainly composed of a metal heat exchange tube 10 and a first electrode 20. The metal heat exchange tube 10 is the main component for the evaporator to achieve heat exchange. The metal heat exchange tube 10 is specifically a hollow copper tube structure, which is usually designed to be a serpentine shape. The inside of the metal heat exchange tube 10 is used for the circulation of refrigerant. When the air conditioner is cooling, since the metal heat exchange tube 10 is exposed to the air, condensed water is formed on the surface of the metal heat exchange tube 10 through condensation. A large area of ​​condensed water adheres to the surface of the metal heat exchange tube 10 to form a layer of liquid film. The liquid film and the substrate of the evaporator itself will form a loop, which constitutes electrochemical corrosion. If it is not treated for a long time, the condensed water on the surface of the metal heat exchange tube 10 will corrode the metal heat exchange tube 10. In this embodiment, an electrical connection part 11 is provided on the metal heat exchange tube 10. The electrical connection part 11 is integrated with the metal heat exchange tube 10. The electrical connection part 11 is specifically a terminal or a connecting wire for wiring. The design material of the electrical connection part 11 is the same as that of the metal heat exchange tube 10. The electrical connection part 11 is mainly used to apply a first potential. The first electrode 20 is adjacent to the metal heat exchange tube 10. The first electrode 20 is designed with a conductive and corrosion-resistant material. The first electrode 20 is mainly used to apply a second potential, wherein the second potential is higher than the first potential. In practical applications, after the evaporator completes refrigeration, the surface of the metal heat exchange tube 10 condenses to form condensed water, and a large area of ​​condensed water forms a liquid film on the surface of the metal evaporator. The condensed water acts as a corrosive medium. Since the first electrode 20 is adjacent to the metal heat exchange tube 10, when the condensed water reaches a certain amount, it will contact the first electrode 20. When the first electrode 20 contacts the condensed water as a corrosive medium, it will establish an electrical connection with the metal heat exchange tube 10 through the condensed water, and electrons can enter the metal heat exchange tube 10 from the first electrode 20 through the corrosive medium (condensed water). In specific applications, a first potential is generated by a corresponding circuit to be applied to the electrical connection portion 11 on the metal heat exchange tube 10, and a second potential is generated to be applied to the first electrode 20. The second potential applied is higher than the first potential, so that a potential difference is formed between the first electrode 20 and the metal heat exchange tube 10. The application of the first potential and the second potential can be specifically realized by a constant current source circuit or a power supply circuit.The first potential is applied to the first electrode 20, and the second potential is applied to the entire metal heat exchange tube 10 through the electrical connection part 11 on the metal heat exchange tube 10. The condensed water on the surface of the metal heat exchange tube 10 acts as a connecting bridge between the first electrode 20 and the metal heat exchange tube 10 after contacting the first electrode 20 as a corrosive medium, so that the first electrode 20 and the metal heat exchange tube 10 are conductive, thereby forming a loop between the first electrode 20, the corrosive medium and the metal heat exchange tube 10. Since the second potential is higher than the first potential, the first electrode 20 is the anode in the loop, and the potential on the metal heat exchange tube 10 is always lower than the ambient environment. The metal heat exchange tube 10 as a whole becomes the cathode in the loop. By stably applying the first potential and the second potential, the first electrode 20 can continuously provide electrons to the metal heat exchange tube 10. As a cathode, the metal heat exchange tube 10 will not undergo an oxidation reaction due to the loss of electrons, thereby avoiding corrosion by the corrosive medium. The metal heat exchange tube 10 is therefore protected, and the overall service life of the evaporator becomes longer.

[0035] The evaporator of this embodiment sets an electrical connection part on the metal heat exchange tube for applying a first potential, and sets a first electrode adjacent to the metal heat exchange tube for applying a second potential. The first electrode establishes an electrical connection with the metal heat exchange tube by contacting the corrosive medium. By applying a second potential higher than the first potential, the first electrode becomes an anode and the metal heat exchange tube as a whole becomes a cathode, thereby reducing the electron loss of the metal heat exchange tube, preventing the metal heat exchange tube from undergoing an oxidation reaction, and effectively avoiding corrosion of the metal heat exchange tube.

[0036] In one embodiment, referring to Figures 1 to 4 The metal heat exchange tube 10 has a first end 101 and a second end 102 that are far away from each other, the first electrode 20 is adjacent to the first end 101 of the metal heat exchange tube 10 , and the electrical connection portion 11 is disposed at the second end 102 of the metal heat exchange tube 10 . In a specific implementation, the metal heat exchange tube 10 has a first end 101 and a second end 102 that are far away from each other. The first electrode 20 is located adjacent to the first end 101 of the metal heat exchange tube 10. The electrical connection portion 11 of the metal heat exchange tube 10 is located on the second end 102 of the metal heat exchange tube 10. The second end 102 of the metal heat exchange tube 10 serves as a location for applying a first potential. After the first electrode 20 contacts the corrosive medium, the first electrode 20 preferentially establishes an electrical connection with the first end 101 of the metal heat exchange tube 10. The first end 101 of the metal heat exchange tube 10 serves as a location for applying a second potential. Since the first end 101 and the second end 102 are far away from each other, the two locations on the metal heat exchange tube 10 that are far away from each other serve as priority access locations for electrical signals. The formed loop is longer, which can protect the entire metal heat exchange tube 10 to the greatest extent and ensure that the entire metal heat exchange tube 10 will not be corroded.

[0037] Further, refer to Figure 1 and Figure 7 The evaporator further includes an angle frame 30, which is arranged at the first end 101 of the metal heat exchange tube 10. A drainage surface 301 is formed on the inner side of the angle frame 30, and the first electrode 20 is arranged on the drainage surface 301. In a specific implementation, the evaporator further includes an angle frame 30, which is arranged and installed on the first end 101 of the metal heat exchange tube 10. The angle frame 30 serves as a bracket for supporting the metal heat exchange tube 10, and is used to support the metal heat exchange tube 10 as a whole, so that the pipeline of the metal heat exchange tube 10 can remain stable. A drainage surface 301 is formed on the inner side of the angle frame 30. The drainage surface 301 is a plane structure, and its function is to guide the condensed water as a corrosive medium to flow along the plane. The first electrode 20 is arranged on the drainage surface 301 and is adjacent to the first end 101 of the metal heat exchange tube 10. In practical applications, when condensed water forms on the surface of the metal heat exchange tube 10, the condensed water, as a corrosive medium, will flow along the drainage surface 301 when the amount is large and contact the first electrode 20 on the drainage surface 301, so that the first electrode 20 and the metal heat exchange tube 10 are electrically connected. When the amount of condensed water, as a corrosive medium, is small, it will also adhere to the drainage surface 301 to form a layer of water film under the action of liquid tension, which can also establish an electrical connection between the first electrode 20 and the metal heat exchange tube 10. Under the action of the drainage surface 301, as long as condensed water, as a corrosive medium, forms on the surface of the metal heat exchange tube 10, the first electrode 20 can be electrically connected to the metal heat exchange tube 10, making the anti-corrosion protection of the metal heat exchange tube 10 more reliable.

[0038] Furthermore, refer to Figures 6 to 11 , the drainage surface 301 is provided with a mounting hole 31, the first end 101 of the metal heat exchange tube 10 is formed with a bent tube section 12, and the bent tube section 12 is inserted into the mounting hole 31. In a specific implementation, a mounting hole 31 is provided on the mounting surface of the angle frame 30, and the mounting hole 31 passes through both the inner and outer sides of the angle frame 30. The first end 101 of the metal heat exchange tube 10 is formed with a bent tube section 12, which is a tube section of the metal heat exchange tube 10 bent in a "U" shape, and the bent tube section 12 is inserted into the mounting hole 31 as a whole, so as to realize the connection and assembly between the metal heat exchange tube 10 and the angle frame 30. The bent pipe section 12 is the weakest pipe body section in the metal heat exchange tube 10. In actual applications, a large amount of condensed water is easily condensed at the bent pipe section 12. Therefore, the bent pipe section 12 is passed through the mounting hole 31 on the drainage surface 301 of the angle frame 30. The condensed water can more easily flow into the drainage surface 301 on the angle frame 30, and then flow along the drainage surface 301 to contact the first electrode 20, so as to conduct the first electrode 20 with the metal heat exchange tube 10, so as to establish an electrical connection between the first electrode 20 and the metal heat exchange tube 10, thereby forming a loop.

[0039] In one embodiment, referring to Figures 7 to 11 , there are multiple mounting holes 31, and the multiple mounting holes 31 are spaced apart on the drainage surface 301. A guide groove 32 is formed on the drainage surface 301, and the guide groove 32 is connected with at least two mounting holes 31. In a specific implementation, the number of the bent pipe segments 12 at the first end 101 of the metal heat exchange tube 10 is usually large, and the number of mounting holes 31 is set to be multiple, and the multiple mounting holes 31 are spaced apart on the drainage surface 301. The number of mounting holes 31 corresponds to the number of the bent pipe segments 12, and the positions correspond to the positions of the bent pipe segments 12. A guide groove 32 is also formed on the drainage surface 301. The guide groove 32 is a through groove structure on the drainage surface 301. There are multiple guide grooves 32, and each guide groove 32 is connected with at least two mounting holes 31, so that at least two mounting holes 31 are connected through one guide groove 32. In actual applications, the bent pipe segment 12 is inserted into the mounting hole 31, and the condensed water condensed on the bent pipe segment 12 is easily gathered on the outer edge of the mounting hole 31. The guide groove 32 serves as a connecting path between the mounting holes 31. The condensed water gathered on the outer edge of a mounting hole 31 can flow along the guide groove 32 to other mounting holes 31 and contact with other bent pipe segments 12. In this way, the condensed water gathered on the outer edges of multiple mounting holes 31 can be circulated with each other, so that the multiple bent pipe segments 12 inserted into the multiple mounting holes 31 can be connected through the condensed water. When the first electrode 20 contacts a part of the condensed water, the first electrode 20 can simultaneously establish an electrical connection with the multiple bent pipe segments 12 at the first end 101 of the metal heat exchange tube 10, thereby ensuring the conductivity of the entire circuit.

[0040] Further, refer to Fig. 9 and Fig.10 , the outer edge of the mounting hole 31 is recessed inward to form a liquid collecting groove 310, and the guide groove 32 is connected with the liquid collecting groove 310. In the specific implementation, the outer edge of the mounting hole 31 is recessed to form a liquid collecting groove 310, and the liquid collecting groove 310 surrounds the bent pipe section 12. The guide groove 32 and the liquid collecting groove 310 are connected with each other, so that a space is left between the outer edge of the mounting hole 31 and the bent pipe section 12. In practical applications, the bent pipe section 12 is passed through the mounting hole 31, and the condensed water condensed on the bent pipe section 12 can be gathered in the liquid collecting groove 310, and then the condensed water gathered in the liquid collecting groove 310 overflows along the guide groove 32, and the condensed water contacts the first electrode 20 on the drainage surface 301. The liquid collecting groove 310 realizes the continuous flow of condensed water as a whole, and the condensed water flows more smoothly and orderly, and the circuit conductivity formed by the first electrode 20 and the metal heat exchange tube 10 is better.

[0041] In one embodiment, the electrical connection part 11 is a copper wire. In specific implementation, the metal heat exchange tube 10 is usually designed with a copper tube, which is a copper material conductor. The electrical connection part 11 here uses a copper wire that is the same as the metal evaporator material, which can ensure that the entire metal heat exchange tube 10 becomes the cathode in the loop, and the entire metal heat exchange tube 10 is protected, and the anti-corrosion reliability is higher.

[0042] In one embodiment, an air conditioner indoor unit is provided, which includes a power module and the evaporator described in the above embodiment, wherein the power module is provided with a first connection end and a second connection end, wherein the first connection end is connected to the electrical connection portion 11, and the second connection end is connected to the first electrode 20, wherein the power module is used to generate the first potential and the second potential at the first connection end and the second connection end, respectively. In a specific implementation, the evaporator is mainly used to exchange heat between the refrigerant and the environment, thereby achieving the refrigeration effect of the air conditioner indoor unit. In addition to the power module and the evaporator, the air conditioner indoor unit also includes components such as a controller and a crossflow fan blade. The power module is a circuit or device that can generate a constant and stable current in the air conditioner indoor unit, and can specifically be a constant current source device. The power module is connected to the controller or integrated on the controller and controlled by the controller system. The power module is provided with a first connection end and a second connection end, wherein the first connection end is connected to the electrical connection portion 11 on the metal heat exchange tube 10 of the evaporator, and the second connection end is connected to the first electrode 20 of the evaporator through a wire. The power module can generate a first potential at the first connection end and a second potential at the second connection end, and the generated second potential is higher than the first potential. The first potential generated by the first connection end of the power module acts on the electrical connection part 11 of the metal heat exchange tube 10 of the evaporator, and the second potential generated by the second connection end acts on the first electrode 20 of the evaporator. In actual application, when the indoor unit of the air conditioner is working, condensed water will condense on the surface of the metal heat exchange tube 10 of the evaporator. When the condensed water contacts the first electrode 20 of the evaporator, the first electrode 20 establishes an electrical connection with the metal heat exchange tube 10 through the condensed water as a corrosive medium, thereby forming a loop between the first electrode 20, the corrosive medium (condensed water), and the metal heat exchange tube 10, the potential on the first electrode 20 of the evaporator is the first potential, and the potential of the electrical connection part 11 on the metal heat exchange tube 10 of the evaporator is the second potential, and the metal heat exchange tube 10 as a whole is also the second potential. Since the second potential is higher than the first potential, the first electrode 20 acts as an anode in the loop, and the potential on the metal heat exchange tube 10 is always lower than the surrounding environment. The metal heat exchange tube 10 as a whole becomes the cathode in the loop. The first electrode 20 as an anode can continuously provide electrons to the metal heat exchange tube 10. The metal heat exchange tube 10 as a cathode will not undergo oxidation reaction due to loss of electrons, and can effectively avoid corrosion. The metal heat exchange tube 10 is therefore protected, and the overall service life of the evaporator becomes longer. Since the previous specification has already made a detailed introduction to the specific structure and working principle of the evaporator, it will not be repeated here for the sake of brevity.

[0043] Furthermore, the indoor unit of the air conditioner also includes a potential regulating module, which is connected to the power module, wherein the potential regulating module is used to adjust the magnitude of the first potential and the second potential. In a specific implementation, the indoor unit of the air conditioner also includes a potential regulating module, which is connected to the power module. The potential regulating module is mainly used to adjust the magnitude of the first potential generated by the first connection end of the power module, and the magnitude of the second potential generated by the second connection end. The potential regulating module can specifically adopt a potentiometer. The magnitude of the first potential and the second potential is adjusted by the potential regulating module, and the current density in the loop is adjusted to cause the metal heat exchange tube 10 of the evaporator to be cathodically polarized, reducing the ability of the anode to release electrons. When the electrons released by the cathode current are sufficient, the surface of the metal heat exchange tube 10 serving as the cathode reaches the equipotential, and the corrosion potential electron action is forced to stop, which can eliminate the corrosion risk of the metal heat exchange tube 10.

[0044] The indoor unit of the air conditioner in this embodiment adopts the evaporator provided by the present invention, so the corrosion risk is greatly reduced and its service life is extended.

[0045] In one embodiment, an air conditioner is provided, which includes the air conditioner indoor unit described in the above embodiment. In addition, the air conditioner includes components such as a compressor and a condenser. The air conditioner indoor unit realizes refrigeration by working with the compressor, condenser and other components. Since the previous specification has made a detailed introduction to the specific structure and working principle of the evaporator, it will not be repeated here for the sake of brevity of the specification.

[0046] The air conditioner in this embodiment has better reliability and longer service life because it adopts the air conditioner indoor unit provided by the present invention.

[0047] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An evaporator, It is characterized in that include: A metal heat exchange tube, on which an electrical connection portion is provided, wherein the electrical connection portion is used to apply a first potential; The first electrode is disposed adjacent to the metal heat exchange tube and is electrically connected to the metal heat exchange tube by contacting the corrosive medium. The first electrode is used to apply a second potential, wherein the second potential is higher than the first potential.

2. The evaporator according to claim 1, It is characterized in that The metal heat exchange tube has a first end and a second end that are far away from each other, the first electrode is adjacent to the first end of the metal heat exchange tube, and the electrical connection portion is disposed at the second end of the metal heat exchange tube.

3. The evaporator according to claim 2, It is characterized in that The evaporator further comprises an angle frame, wherein the angle frame is arranged at the first end of the metal heat exchange tube, a drainage surface is formed on the inner side of the angle frame, and the first electrode is arranged on the drainage surface.

4. The evaporator according to claim 3, It is characterized in that The guide surface is provided with a mounting hole, the first end of the metal heat exchange tube is formed with a bent tube section, and the bent tube section is passed through the mounting hole.

5. The evaporator according to claim 4, It is characterized in that There are multiple mounting holes, and the multiple mounting holes are distributed at intervals on the drainage surface. A guide groove is formed on the drainage surface, and the guide groove is connected to at least two of the mounting holes.

6. The evaporator according to claim 5, It is characterized in that The outer edge of the mounting hole is inwardly recessed to form a liquid collecting groove, and the guide groove is connected with the liquid collecting groove.

7. The evaporator according to any one of claims 1 to 6, It is characterized in that The electrical connection part is a copper wire.

8. An indoor unit of an air conditioner, It is characterized in that It comprises a power module and the evaporator according to any one of claims 1 to 7, wherein the power module is provided with a first connection end and a second connection end, the first connection end is connected to the electrical connection part, and the second connection end is connected to the first electrode, wherein the power module is used to generate the first potential and the second potential at the first connection end and the second connection end respectively.

9. The air conditioner indoor unit according to claim 8, It is characterized in that The air conditioner indoor unit further includes a potential regulating module, which is connected to the power module, wherein the potential regulating module is used to regulate the magnitude of the first potential and the second potential.

10. An air conditioner, It is characterized in that It includes the air conditioner indoor unit as described in any one of claims 8-9.

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