Evaporator, air conditioner indoor unit and air conditioner

Abstract

The utility model 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 utility model relates to the technical field of air conditioning, in particular to an evaporator, an air conditioner indoor unit and an air conditioner. Background Art

[0002] In recent years, more and more air conditioners have been applied to 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 evaporator pipes 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 base material of the evaporator itself form a loop, which constitutes electrochemical corrosion. Therefore, after long-term use of the air conditioner, the evaporator pipes 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. Utility Model Content

[0003] The embodiment of the utility model 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 having an electrical connection portion provided thereon, 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 an 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 part is provided at the second end of the metal heat exchange tube.

[0008] In the evaporator provided in an embodiment of the present invention, the evaporator further includes an angle frame, which 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 utility model, 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, there are multiple mounting holes, and the multiple 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 utility model, 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 in the embodiment of the present invention, the electrical connection portion is a copper wire.

[0013] In a second aspect, an embodiment of the present invention provides an indoor unit of an air conditioner, which includes a power supply module and the evaporator described in the first aspect above, wherein the power supply module is provided with a first connection end and a second connection end, wherein 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 supply 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 adjustment module, which is connected to the power module, wherein the potential adjustment module is used to adjust 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, the electrical connection portion being 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, the first electrode being 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 arranged 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 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 electron loss in the metal heat exchange tube, preventing oxidation reaction in the metal heat exchange tube, and effectively avoiding corrosion of the metal heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0019] Figure 2 A side view of an evaporator provided in an embodiment of the present utility model;

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

[0021] Figure 4 The evaporator provided by the embodiment of the utility model 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 perspective view of an angled frame of an evaporator provided by an embodiment of the present utility model;

[0025] Figure 8 A top view of the angled frame of the evaporator provided in an embodiment of the present utility model;

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

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

[0028] Figure 11 A side sectional view of an angled frame of an evaporator provided in an embodiment of the present utility model;

[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 bracket; 301. Drainage surface; 31. Mounting hole; 310. Liquid collecting tank; 32. Guide trough. 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0032] Directional terms used in this disclosure, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and "side," refer only to directions in the accompanying drawings. Therefore, these directional terms are intended to illustrate and facilitate understanding of this disclosure and are not intended to limit this disclosure. Furthermore, in the accompanying drawings, similar or identical structures are denoted by the same reference numerals.

[0033] Reference Figures 1 to 5 , which illustrates an embodiment of the evaporator provided by the present invention. The structure and operating principle of the evaporator are described in detail below in conjunction with the accompanying drawings. The evaporator includes 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, which is used to apply a first potential. The first electrode 20 is disposed adjacent to the metal heat exchange tube 10 and is electrically connected to the metal heat exchange tube 10 through contact with a corrosive medium. The first electrode 20 is used to apply a second potential, wherein the second potential is higher than the first potential.

[0034] In practice, the evaporator is primarily installed inside the air conditioner's indoor unit to exchange heat for cooling. The evaporator of this embodiment is primarily composed of a metal heat exchange tube 10 and a first electrode 20. The metal heat exchange tube 10 is the primary component of the evaporator for heat exchange. The metal heat exchange tube 10 is a hollow copper tube structure, typically designed in a serpentine shape. The interior of the metal heat exchange tube 10 is used to circulate refrigerant. When the air conditioner is cooling, the metal heat exchange tube 10 is exposed to the air. Condensation forms on the surface of the metal heat exchange tube 10 through condensation. Large areas of condensation adhere to the surface of the metal heat exchange tube 10, forming a liquid film. This liquid film forms a loop with the base material of the evaporator itself, causing electrochemical corrosion. If left untreated for an extended period, the condensation on the surface of the metal heat exchange tube 10 will corrode the metal heat exchange tube 10. In this embodiment, an electrical connection portion 11 is provided on the metal heat exchange tube 10. The electrical connection portion 11 is integral with the metal heat exchange tube 10 and is specifically a terminal or connecting wire. The electrical connection portion 11 is designed from the same material as the metal heat exchange tube 10 and is primarily used to apply a first potential. A first electrode 20 is adjacent to the metal heat exchange tube 10 and is designed from a conductive, corrosion-resistant material. The first electrode 20 is primarily used to apply a second potential, which is higher than the first potential. In actual applications, after the evaporator completes cooling, condensation forms on the surface of the metal heat exchange tube 10. A large area of condensation forms a liquid film on the surface of the metal evaporator. The condensation acts as a corrosive medium. Since the first electrode 20 is adjacent to the metal heat exchange tube 10, when the condensation reaches a certain amount, it will contact the first electrode 20. When the first electrode 20 contacts the condensation as a corrosive medium, it will establish an electrical connection with the metal heat exchange tube 10 through the condensation. Electrons can enter the metal heat exchange tube 10 from the first electrode 20 via the corrosive medium (condensation). In specific applications, a first potential is generated by a corresponding circuit and applied to the electrical connection portion 11 on the metal heat exchange tube 10, and a second potential is generated and applied to the first electrode 20. The applied second potential 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 and second potentials can be achieved by a constant current source circuit or a power supply circuit.A first potential is applied to the first electrode 20, while a second potential is applied to the entire metal heat exchange tube 10 through the electrical connection portion 11 on the metal heat exchange tube 10. The condensed water on the surface of the metal heat exchange tube 10 acts as a corrosive medium and contacts the first electrode 20, thereby acting as a connecting bridge between the first electrode 20 and the metal heat exchange tube 10, so that the first electrode 20 and the metal heat exchange tube 10 are electrically connected, 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 serves as the anode in the loop, and the potential on the metal heat exchange tube 10 is always lower than the ambient temperature. The metal heat exchange tube 10 as a whole serves as the cathode in the loop. By stably applying the first and second potentials, 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 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 is extended.

[0035] The evaporator of this embodiment provides an electrical connection portion on the metal heat exchange tube for applying a first potential, and provides 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 electron loss in the metal heat exchange tube, preventing oxidation reaction in the metal heat exchange tube, 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 part 11 is provided 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 positioned 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 positioned 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 angled bracket 30, which is disposed at the first end 101 of the metal heat exchange tube 10. A drainage surface 301 is formed on the inner side of the angled bracket 30, and the first electrode 20 is disposed on the drainage surface 301. In a specific embodiment, the evaporator further includes an angled bracket 30, which is disposed and mounted on the first end 101 of the metal heat exchange tube 10. The angled bracket 30 serves as a support for the metal heat exchange tube 10, and is used to support the metal heat exchange tube 10 as a whole, thereby maintaining the stability of the metal heat exchange tube 10. A drainage surface 301 is formed on the inner side of the angled bracket 30. The drainage surface 301 is a planar structure, and its function is to guide the condensed water, which serves as a corrosive medium, to flow along the plane. The first electrode 20 is disposed on the drainage surface 301, adjacent to the first end 101 of the metal heat exchange tube 10. In actual applications, when condensed water forms on the surface of the metal heat exchange tube 10, the condensed water, acting as a corrosive medium, will flow along the drainage surface 301 if the amount is large, and will contact the first electrode 20 on the drainage surface 301, thereby establishing an electrical connection between the first electrode 20 and the metal heat exchange tube 10. However, when the amount of condensed water, acting as a corrosive medium, is small, the liquid's tension will cause it to adhere to the drainage surface 301, forming a water film, which can also establish an electrical connection between the first electrode 20 and the metal heat exchange tube 10. As long as condensed water, acting as a corrosive medium, forms on the surface of the metal heat exchange tube 10, the drainage surface 301 can establish an electrical connection between the first electrode 20 and the metal heat exchange tube 10, thereby further reliably protecting the metal heat exchange tube 10 from corrosion.

[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, which is inserted into the mounting hole 31. Specifically, the mounting hole 31 is provided on the mounting surface of the angle bracket 30, and the mounting hole 31 passes through both the interior and exterior sides of the angle bracket 30. The first end 101 of the metal heat exchange tube 10 is formed with a bent tube section 12, which is a U-shaped section of the metal heat exchange tube 10. The bent tube section 12 is entirely inserted into the mounting hole 31, thereby achieving the connection and assembly between the metal heat exchange tube 10 and the angle bracket 30. The bent pipe section 12 is the weakest tube 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, thereby conducting the first electrode 20 with the metal heat exchange tube 10, and establishing an electrical connection between the first electrode 20 and the metal heat exchange tube 10, thereby facilitating the formation of 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 to at least two of the mounting holes 31. In a specific implementation, the number of bent tube 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 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 bent tube segments 12, and the positions correspond to the positions of the bent tube 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 to at least two mounting holes 31, so that at least two mounting holes 31 are connected through one guide groove 32. In actual application, the bent pipe segment 12 is passed through 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 communication 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 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 passed through 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 Figure 9 and Figure 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 to the liquid collecting groove 310. In a specific embodiment, the outer edge of the mounting hole 31 is recessed to form the 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 to each other, so that a space is left between the outer edge of the mounting hole 31 and the bent pipe section 12. In actual application, 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 collected in the liquid collecting groove 310. The condensed water collected in the liquid collecting groove 310 then 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 as a whole realizes the continuous flow of condensed water, 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 portion 11 is a copper conductor. In specific implementations, the metal heat exchange tube 10 is typically designed as a copper tube, which is a copper conductor. The electrical connection portion 11 uses the same copper conductor as the metal evaporator, ensuring that the entire metal heat exchange tube 10 serves as the cathode in the circuit, protecting the entire metal heat exchange tube 10 and enhancing corrosion resistance.

[0042] In one embodiment, an air conditioner indoor unit is provided, comprising a power module and the evaporator described in the above embodiment. The power module has a first connection end and a second connection end, the first connection end being connected to the electrical connection portion 11, and the second connection end being connected to the first electrode 20. The power module is configured 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 primarily used to exchange heat between the refrigerant and the environment, thereby achieving a cooling effect for 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 crossflow blades. The power module is a circuit or device within the air conditioner indoor unit that can generate a constant, stable current, and can specifically be a constant current source device. The power module is connected to the controller or integrated into the controller and controlled by the controller system. The power module has a first connection end and a second connection end. 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 via a wire. The power module can generate a first potential at a first connection end and a second potential at a second connection end. The generated second potential is higher than the first potential. The first potential generated at the first connection end of the power module acts on the electrical connection portion 11 of the metal heat exchange tube 10 of the evaporator, and the second potential generated at the second connection end acts on the first electrode 20 of the evaporator. In actual use, when the air conditioner indoor unit is operating, condensed water condenses 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, which serves as a corrosive medium. This forms a circuit between the first electrode 20, the corrosive medium (condensed water), and the metal heat exchange tube 10. The potential at the first electrode 20 of the evaporator is the first potential, while the potential at the electrical connection portion 11 of the metal heat exchange tube 10 of the evaporator is the second potential. The metal heat exchange tube 10 as a whole also has the second potential. Because the second potential is higher than the first potential, the first electrode 20 acts as the anode in the circuit, and the potential on the metal heat exchange tube 10 remains lower than the ambient temperature. The metal heat exchange tube 10 as a whole becomes the cathode in the circuit. The first electrode 20, acting as the anode, continuously provides electrons to the metal heat exchange tube 10. The metal heat exchange tube 10, acting as the cathode, does not undergo oxidation due to electron loss, effectively preventing corrosion. This protects the metal heat exchange tube 10, extending the life of the evaporator as a whole. Since the specific structure and operating principle of the evaporator have been described in detail in the previous description, they 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 undergo cathodic polarization, 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 same potential, and the corrosion potential electron action is forced to stop, which can eradicate 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 utility model, 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 cooling by working together with the compressor, condenser and other components. Since the previous specification has already made a detailed introduction to the specific structure and working principle of the evaporator, for the sake of brevity of the specification, it will not be repeated here.

[0046] The air conditioner in this embodiment has better reliability and longer service life due to the adoption of the air conditioner indoor unit provided by the utility model.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. An evaporator, characterized in that: include: a metal heat exchange tube having an electrical connection portion provided thereon, 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, 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. The electrical connection portion is provided at the second end of the metal heat exchange tube.

3. The evaporator according to claim 2, characterized in that The evaporator further includes an angle frame, which 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, characterized in that The guide surface is provided with a mounting hole, and 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, 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, characterized in that 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.

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

8. An air conditioner indoor unit, characterized in that: The evaporator 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 portion, 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, 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, characterized in that: Including the air conditioner indoor unit according to any one of claims 8-9.

Images