Surface treatment method of air source heat pump heat exchanger and air source heat pump heat exchanger

Abstract

The invention provides a surface treatment method of an air source heat pump heat exchanger and the air source heat pump heat exchanger. The surface treatment method comprises the steps that the air source heat pump heat exchanger is provided, the surface of the air source heat pump heat exchanger is provided with a hydrophilic coating, and the air source heat pump heat exchanger is provided with an air inlet side and an air outlet side which are opposite; the air inlet side is subjected to hydrophobic treatment to form a hydrophobic part, and the air outlet side which is not subjected to hydrophobic treatment is a hydrophilic part; wherein the hydrophobic treatment on the air inlet side comprises the step of selecting at least one of a water-based coating, an oil-based coating and a powder coating based on the structure of the air source heat pump heat exchanger; and carrying out at least one of dip-coating, shower-coating and spray-coating on the air inlet side based on the coating type so as to form a hydrophobic part. When the heat exchanger works under the low-temperature and high-humidity conditions, condensed liquid drops of the hydrophobic parts are separated and then adsorbed by the hydrophilic parts, and flow away along the fins under the action of gravity, so that the heat exchanger has the frost restraining performance, and meanwhile the problem of water blowing and freezing is solved.

Description

Technical Field

[0001] This disclosure relates to the field of air source heat pump technology, and more specifically, to a surface treatment method for an air source heat pump heat exchanger and an air source heat pump heat exchanger. Background Technology

[0002] Air source heat pump technology is a core pathway to achieving low-carbon transformation in buildings and industry. This technology is characterized by high energy efficiency, high energy efficiency ratio, environmental friendliness, stable and reliable operation, and wide applicability, meeting the needs of various fields such as buildings, industry, and agriculture. However, during winter heating, the outdoor unit heat exchanger of air source heat pumps faces severe frosting problems, leading to reduced heating efficiency or even malfunction.

[0003] In existing technologies, applying a superhydrophobic coating to the surface of a heat exchanger can significantly improve its defrosting / snowfall cycle performance while reducing defrosting energy consumption. However, tests have revealed that while the superhydrophobic coating improves defrosting / snowfall cycle performance, it also introduces new problems under low-temperature heating conditions: due to the low adhesion of droplets on the surface of the hydrophobic heat exchanger, condensate droplets are blown onto the air outlet grille by the outdoor unit. In low-temperature, high-humidity environments, icing on the air outlet grille significantly increases the drag coefficient, severely impacting the heat exchange capacity of the air source heat pump outdoor unit and the defrosting ability of the hydrophobic heat exchanger. Furthermore, since the air outlet grille lacks de-icing capabilities, this effect persists. Summary of the Invention

[0004] In view of the above problems, this disclosure provides a surface treatment method for an air source heat pump heat exchanger and an air source heat pump heat exchanger. The surface-treated air source heat pump heat exchanger has anti-frost performance while avoiding the problem of water blowing and icing.

[0005] According to a first aspect of this disclosure, a surface treatment method for an air source heat pump heat exchanger is provided, comprising:

[0006] An air source heat pump heat exchanger is provided, the surface of which has a hydrophilic coating, and the air source heat pump heat exchanger has opposing air inlet and air outlet sides.

[0007] The air inlet side is treated with hydrophobic material to form a hydrophobic part, while the air outlet side, which is not treated with hydrophobic material, is a hydrophilic part.

[0008] The hydrophobic treatment of the air inlet side includes:

[0009] Based on the structure of the air source heat pump heat exchanger, at least one of water-based coatings, oil-based coatings, and powder coatings can be selected;

[0010] The air inlet side is dip-coated, dip-coated, or spray-coated according to the type of coating to form a hydrophobic part.

[0011] According to embodiments of this disclosure, before performing hydrophobic treatment on the air inlet side, the method further includes: performing oil removal and decontamination treatment on the air source heat pump heat exchanger.

[0012] According to embodiments of this disclosure, the air source heat pump heat exchanger includes a tube-fin heat exchanger and a plate heat exchanger.

[0013] According to an embodiment of this disclosure, the air inlet side of the tube-fin heat exchanger is subjected to hydrophobic treatment, which includes forming the hydrophobic portion on the air inlet side by means of dip coating and / or spray coating using the water-based coating.

[0014] According to an embodiment of this disclosure, the air inlet side of the tube-fin heat exchanger is subjected to hydrophobic treatment, which includes forming the hydrophobic portion on the air inlet side by spraying the oil-based coating.

[0015] According to an embodiment of this disclosure, the air inlet side of the plate heat exchanger is subjected to hydrophobic treatment, which includes forming the hydrophobic portion on the air inlet side by spraying the oil-based coating.

[0016] According to an embodiment of this disclosure, the air inlet side of the plate heat exchanger is subjected to hydrophobic treatment, which includes forming the hydrophobic portion on the air inlet side by spraying the powder coating.

[0017] According to an embodiment of this disclosure, after forming the hydrophobic portion, the method further includes: selecting at least one of a first curing temperature, a second curing temperature, and a third curing temperature based on the coating type, and performing a curing treatment on the hydrophobic portion, wherein the first curing temperature is lower than the second curing temperature, and the second curing temperature is lower than the third curing temperature.

[0018] According to embodiments of this disclosure, the hydrophobic portion coated with the oil-based coating is cured at a first curing temperature; the hydrophobic portion coated with the water-based coating is cured at a second curing temperature; and the hydrophobic portion coated with the powder coating is cured at a third curing temperature.

[0019] According to a second aspect of this disclosure, an air source heat pump heat exchanger is provided, wherein the surface of the air source heat pump heat exchanger is treated by any of the surface treatment methods described above, and a hydrophobic portion is formed on the air inlet side of the treated air source heat pump heat exchanger, and a hydrophilic portion is formed on the air outlet side of the air source heat pump heat exchanger.

[0020] The above one or more embodiments have the following beneficial effects:

[0021] 1. By treating the air inlet side of the heat exchanger with hydrophobic material to form a hydrophobic section, and the air outlet side without hydrophobic treatment is a hydrophilic section, when the heat exchanger is working under low temperature and high humidity conditions, the condensate droplets in the hydrophobic section are detached and adsorbed by the hydrophilic section, and flow away along the fins under the action of gravity, so that the heat exchanger has anti-frost performance while avoiding the problem of water blowing and icing.

[0022] 2. When performing hydrophobic treatment on heat exchangers, select a matching coating type based on the structural characteristics of the heat exchanger, such as tube-fin type or plate type, to ensure that the coating can adhere well and exert a hydrophobic effect. Then, select the coating method according to the coating type, such as spraying or dipping, to ensure the quality and performance of the coating, extend the service life of the coating, and achieve stable operation of the heat exchanger. Attached Figure Description

[0023] The foregoing contents, as well as other objects, features, and advantages of this disclosure, will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 The schematic diagram illustrates the steps of a surface treatment method for an air source heat pump heat exchanger according to an embodiment of this application;

[0025] Figure 2 This diagram schematically illustrates the steps of performing hydrophobic treatment on the air inlet side according to an embodiment of this application.

[0026] Figure 3 The illustration shows a schematic diagram of dipping an air inlet side with a water-based coating according to an embodiment of this application;

[0027] Figure 4 This illustration schematically shows a diagram of spraying an oil-based coating onto the air inlet side according to an embodiment of this application;

[0028] Figure 5 This illustration schematically shows a diagram of powder coating applied to the air inlet side according to an embodiment of this application;

[0029] Figure 6 A flowchart illustrating a surface treatment method for an air source heat pump heat exchanger according to an embodiment of this application is shown schematically.

[0030] Figure 7 A schematic diagram of the cross-section of the surface-treated air source heat pump heat exchanger fins according to an embodiment of this application is shown.

[0031] It should be noted that, for clarity, the dimensions of the overall / partial structure or the overall / partial region in the drawings used to describe the embodiments of this disclosure may be enlarged or reduced, i.e., these drawings are not drawn to actual scale.

[0032] Component designation explanation

[0033] 300 Air source heat pump heat exchanger 31 Air intake side 32 Air outlet side 310 Drainage section 320 Hydrophilic section 41 hydrophobic water 42 Spray nozzles and spray guns 43 air pump 44 electrostatic spray gun 45 spray can Detailed Implementation

[0034] The embodiments of this application will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this application. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of this application for ease of explanation. However, it will be apparent that one or more embodiments may be implemented without these specific details. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0035] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0036] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0037] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0038] In related technologies, for heat exchangers with superhydrophobic coatings on their surfaces, under low-temperature heating conditions, the low adhesion of droplets on the hydrophobic surface causes condensate droplets to be blown onto the air outlet grille and freeze, thereby increasing the heat exchanger's drag coefficient and severely affecting its heat exchange capacity and frost suppression capability.

[0039] Embodiments of this application provide a surface treatment method for an air source heat pump heat exchanger, comprising: providing an air source heat pump heat exchanger, the surface of which has a hydrophilic coating, the air source heat pump heat exchanger having an air inlet side and an air outlet side; performing hydrophobic treatment on the air inlet side to form a hydrophobic portion, and the air outlet side without hydrophobic treatment being a hydrophilic portion; wherein, performing hydrophobic treatment on the air inlet side includes: selecting at least one of water-based coating, oil-based coating, and powder coating based on the structure of the air source heat pump heat exchanger; and performing at least one of dip coating, dip coating, and spray coating on the air inlet side based on the coating type to form a hydrophobic portion.

[0040] According to an embodiment of this application, by performing hydrophobic treatment on the air inlet side of the heat exchanger to form a hydrophobic part, and the air outlet side is not hydrophobic and is a hydrophilic part, when the heat exchanger is working under low temperature and high humidity conditions, the condensate droplets in the hydrophobic part are detached and adsorbed by the hydrophilic part, and flow away along the fins under the action of gravity, so that the heat exchanger has anti-frost performance while avoiding the problem of water blowing and icing.

[0041] Figure 1 The diagram illustrates the steps of a surface treatment method for an air source heat pump heat exchanger according to an embodiment of this application.

[0042] like Figure 1 As shown, the surface treatment method for the air source heat pump heat exchanger provided in this embodiment includes operations 110 to 120.

[0043] In operation 110, an air source heat pump heat exchanger is provided, the surface of which has a hydrophilic coating, and the air source heat pump heat exchanger has opposing air inlet and air outlet sides.

[0044] According to embodiments of this application, the air source heat pump heat exchanger includes tube-fin heat exchangers and plate heat exchangers, wherein the tube-fin heat exchangers include single-row tube-fin heat exchangers and multi-row tube-fin heat exchangers. Air source heat pump heat exchangers are mostly made of metals with good thermal conductivity, such as aluminum, copper, or stainless steel. Generally, to prevent corrosion and frost formation, a hydrophilic coating is applied to the heat exchanger. This coating allows for strong interaction with water molecules, and water droplets easily spread to form a water film on its surface. In this embodiment, the air source heat pump heat exchanger is made of hydrophilic aluminum foil conforming to GB / T 22638.9-2016.

[0045] According to embodiments of this application, the tube-fin heat exchanger mainly consists of a base tube and fins. The base tube is typically a round tube, an elliptical tube, or a flat tube. The fins are fixed to the outside of the base tube by welding, mechanical connection, or other methods, and come in various shapes, such as straight fins, corrugated fins, and serrated fins, which can expand the heat transfer area and enhance the heat exchange effect.

[0046] According to embodiments of this application, the plate heat exchanger consists of multiple parallel corrugated heat transfer plates, with fluid channels formed on both sides of the plates, and hot and cold fluids separated by sealing gaskets. The corrugated shape enhances turbulence and expands the heat transfer area. The channel spacing can be adjusted according to the application scenario. The overall structure is compact, easy to disassemble and clean, and is often used in scenarios requiring high-efficiency heat exchange and high maintenance requirements.

[0047] like Figure 7 As shown, the air source heat pump heat exchanger 300 has an air inlet side 31 and an air outlet side 32. The air inlet side 31 is the side of the heat exchanger that comes into contact with the outside air and draws in air; the air outlet side 32 is the side of the heat exchanger that discharges the air after heat exchange, and is generally equipped with an air outlet guide structure to uniformly and efficiently discharge the treated air, reduce airflow resistance and turbulence, reduce noise, and at the same time avoid air short-circuiting, ensuring the normal operation and heat exchange effect of the heat exchanger.

[0048] In operation 120, the air inlet side is treated with hydrophobic material to form a hydrophobic section, while the air outlet side, which is not treated with hydrophobic material, is a hydrophilic section.

[0049] According to an embodiment of this application, before performing hydrophobic treatment on the air inlet side, the process further includes: degreasing and decontamination treatment of the air source heat pump heat exchanger. First, an air pump is used to remove dust from the heat exchanger. Specifically, the air pump is powered on, the air flow rate is set to 40 m³ / h, and a combination of horizontal and vertical sweeping methods is used to sequentially remove dust from each part of the heat exchanger until the entire heat exchanger is cleaned. Next, sufficient detergent to submerge the heat exchanger is added to an ultrasonic cleaning tank, and ultrasonic cleaning is performed for 10 to 30 minutes to remove oil stains. Then, deionized water is used to submerge the heat exchanger in an ultrasonic cleaning tank, and ultrasonic cleaning is performed for 10 to 30 minutes, repeated twice, to remove the detergent. Finally, the cleaned heat exchanger is placed in a forced-air drying oven and dried at 60°C to 80°C for 10 to 30 minutes to complete the cleaning process.

[0050] like Figure 7 As shown, the air inlet side 31 is treated with hydrophobic material to form a hydrophobic section 310, while the remaining untreated parts of the heat exchanger are hydrophilic sections 320. When the heat exchanger operates under low temperature and high humidity conditions, the air outlet side has hydrophilic fins, i.e., hydrophilic sections 320. After the condensate droplets from the hydrophobic section 310 are detached, they are adsorbed by the hydrophilic section 320 and flow away along the fins under gravity. This allows the air source heat pump heat exchanger to have anti-frost performance while avoiding the problem of water blowing and icing.

[0051] Figure 2 The diagram illustrates the steps of performing hydrophobic treatment on the air inlet side according to an embodiment of this application.

[0052] like Figure 2As shown, the hydrophobic treatment of the air inlet side provided in this embodiment includes operations 210 to 220.

[0053] In operation 210, the structure of the air source heat pump heat exchanger is selected from at least one of water-based coatings, oil-based coatings, and powder coatings.

[0054] In operation 220, at least one of dip coating, spray coating, or coating is applied to the air inlet side based on the coating type to form a hydrophobic section.

[0055] According to an embodiment of this application, after forming the hydrophobic portion 310, the method further includes: selecting at least one of a first curing temperature, a second curing temperature, and a third curing temperature based on the coating type, and curing the hydrophobic portion 310. In this embodiment, the first curing temperature is between 20°C and 40°C, the second curing temperature is between 100°C and 150°C, and the third curing temperature is between 150°C and 300°C.

[0056] In an optional embodiment, for a tube-fin heat exchanger, a hydrophobic portion 310 is formed on the air inlet side of the heat exchanger using an aqueous coating by dip coating and / or spray coating, followed by curing at a second curing temperature. Taking dip coating as an example... Figure 3 As shown, the dip coating tank is placed horizontally on the ground, and the air inlet side 31 of the heat exchanger is placed in the dip coating tank. Water-based hydrophobic coating is added so that the hydrophobic solution 41 can immerse part of the air inlet fins. After full immersion, the heat exchanger is slowly lifted using a vertical lifting method. First, air is blown from the air outlet side 32 to the air inlet side 31 at room temperature to blow off the excess solution hanging on the fins. After drying, it is placed in an oven and cured at a temperature of 100℃~150℃ for 20 minutes. The above steps are repeated three times to form a hydrophobic part 310 on the air inlet side 31 of the tube-fin heat exchanger.

[0057] For relatively complex tube-fin heat exchangers, dip coating allows for 31° all-around uniform contact of the coating on the air inlet side, ensuring that the specific coating is fully formed on the surface and in the gaps. Considering environmental protection and volatile organic compound (VOC) issues, water-based coatings are the best solution because they use water as a solvent, have low VOC content, and have less impact on the environment and human health.

[0058] In another alternative embodiment, for a tube-fin heat exchanger, an oil-based coating is used to form a hydrophobic portion 310 on the air inlet side of the heat exchanger by spraying, followed by curing at a first curing temperature. Specifically, as shown... Figure 4As shown, place the heat exchanger 300 horizontally on the operating table, connect the straight nozzle spray gun 42 to the air pump 43, load the oil-based quick-drying primer coating spray can 45 onto the spray gun 42, and when the air pump pressure reaches 0.8 MPa, the nozzle is about 15 cm away from the heat exchanger, the straight nozzle is vertically downward, and the spray is slowly applied to the air inlet side fins of the heat exchanger at a 45° angle. After all the air inlet side leading edge fins are treated, cure at room temperature (20℃~40℃) for 30 minutes. After the primer is cured, connect the oil-based quick-drying hydrophobic topcoat coating spray can 45 to the spray gun 42, and when the air pump pressure reaches 0.8 MPa, the nozzle is about 15 cm away from the heat exchanger, the straight nozzle is vertically downward, and the spray is slowly applied to the air inlet fins of the heat exchanger at a 45° angle. After all the air inlet side edge fins are treated, cure at room temperature (20℃~40℃) for 30 minutes.

[0059] Spraying utilizes high-pressure airflow to atomize the paint, flexibly and precisely covering complex shapes. Even with grooves and curved surfaces, a uniform coating can be achieved, and the coating thickness is controllable. For the technical renovation market, spraying oil-based quick-drying paint to form a hydrophobic layer (310) is more convenient and faster. The rapid drying speed of oil-based quick-drying paint can form a protective film in a short time, greatly improving construction efficiency and effectively shortening the project cycle. It is particularly suitable for technical renovation projects with strict time requirements.

[0060] In an optional embodiment, for a plate heat exchanger, an oil-based coating is used to form a hydrophobic portion 310 on the air inlet side of the heat exchanger by spraying, followed by curing at a first curing temperature. Specifically, as shown... Figure 4 As shown, place the heat exchanger 300 horizontally on the operating table, connect the straight nozzle spray gun 42 to the air pump 43, load the oil-based quick-drying primer coating can 45 onto the spray gun 42, and when the air pump pressure reaches 0.8 MPa, the nozzle is about 15 cm away from the heat exchanger, the straight nozzle is vertically downward, and the spray is slowly applied to the air inlet fins of the heat exchanger at a 45° angle. After all the leading edge fins on the air inlet side are treated, cure at room temperature (20℃~40℃) for 30 minutes. After the primer has cured, connect the oil-based quick-drying hydrophobic topcoat coating can 45 to the spray gun 42, and when the air pump pressure reaches 0.8 MPa, the nozzle is about 15 cm away from the heat exchanger, the straight nozzle is vertically downward, and the spray is slowly applied to the air inlet fins of the heat exchanger at a 45° angle. After all the air inlet side fins are treated, cure at room temperature (20℃~40℃) for 30 minutes.

[0061] In another alternative embodiment, for a plate heat exchanger, a hydrophobic portion 310 is formed on the air inlet side of the heat exchanger by spraying powder coating, and then cured at a third curing temperature. Specifically, as shown... Figure 5As shown, the heat exchanger 300 is placed horizontally in the powder chamber and grounded. The electrostatic spray gun 44 is connected to the air pump 43. The electrostatic spray gun uses a straight nozzle. The powder is loaded into the spray can 45. When the air pump pressure reaches 0.8 MPa, the fluidization knob of the electrostatic sprayer is adjusted so that the powder in the spray can 45 can be stably suspended. The powder dispensing knob and atomization knob are adjusted to appropriate positions. The nozzle is about 15 cm away from the heat exchanger. The straight nozzle is vertically downward and tilted at a 45° angle, slowly sweeping over the air inlet fins. After all the air inlet fins are treated, the heat exchanger is sent into a high-temperature oven and cured at a temperature of 150℃~300℃ for 30 minutes.

[0062] For plate heat exchangers, electrostatic spraying offers significant advantages. During electrostatic spraying, charged paint particles impact the workpiece surface at high speed, forming a microscopic rough structure that increases the surface roughness of the heat exchanger, laying the foundation for hydrophobic surface construction. Under the influence of an electrostatic field, the paint can uniformly cover all parts of the workpiece, forming a hydrophobic coating of uniform thickness, which helps improve the stability of hydrophobic properties. The particle size of the paint can be precisely controlled to meet different roughness requirements. In addition, electrostatic powder has a low content of volatile organic compounds, resulting in less impact on the environment and human health.

[0063] Figure 6 A flowchart illustrating a surface treatment method for an air source heat pump heat exchanger according to an embodiment of this application is shown schematically.

[0064] First, the air source heat pump heat exchanger is degreased and cleaned to ensure that the surface of the heat exchanger is fully exposed and clean and flat, thus laying a good foundation for subsequent surface treatment processes.

[0065] Next, based on the structural characteristics and operating requirements of the air source heat pump heat exchanger, and taking into account the adhesion, corrosion resistance and environmental performance of the coating, at least one of water-based coatings, oil-based coatings and powder coatings can be selected to achieve effective protection and performance improvement of the heat exchanger surface.

[0066] Next, based on the coating type and the structural characteristics and operating environment of the air inlet side of the heat exchanger, at least one of the following methods—dipping, spraying, or immersion coating—is applied to the air inlet side to ensure uniform coating coverage and improve protective performance. For water-based coatings, due to their good fluidity and environmental friendliness, dipping or spraying methods can be used to fully wet the fins and tube bundles. For oil-based coatings, a spray gun is used, with precise control of the air pressure, flow rate, and spray width to ensure uniform and delicate adhesion of the coating to the workpiece surface. For powder coatings, electrostatic spraying achieves high adhesion and a non-sagging effect, making it particularly suitable for simple-shaped air inlet side components, thereby enhancing the heat exchanger's corrosion resistance and heat exchange efficiency.

[0067] Finally, based on the coating type, at least one of room temperature curing, oven curing, and high-temperature oven curing is selected to cure the hydrophobic part 310. For water-based coatings, oven curing is used, with the oven curing temperature being the second curing temperature. This allows for the full evaporation of water in the water-based coating in a short time and promotes the cross-linking reaction of the polymer components in the coating, thereby achieving rapid curing of the coating. For oil-based coatings, room temperature curing is used, with the room temperature curing temperature being the first curing temperature. The solvent is rapidly released through natural evaporation, while the cross-linking curing process is completed with the help of oxygen in the air or a catalyst. For powder coatings, high-temperature oven curing is used, with the high-temperature oven curing temperature being the third curing temperature. The powder coating particles melt, level, and undergo a cross-linking reaction at high temperature, forming a tough, smooth, and dense coating.

[0068] Figure 7 This illustration shows a schematic diagram of the cross-section of a surface-treated air source heat pump heat exchanger fin according to an embodiment of this application.

[0069] like Figure 7 As shown, the surface of the air source heat pump heat exchanger is treated by the aforementioned surface treatment method. After treatment, the air inlet side of the air source heat pump heat exchanger has a hydrophobic portion 310, while the outlet side, which is not treated with hydrophobicity, has a hydrophilic portion 320. When the heat exchanger operates under low temperature and high humidity conditions, the outlet side has hydrophilic fins, i.e., hydrophilic portion 320. After the condensate droplets from the hydrophobic portion 310 are detached, they are adsorbed by the hydrophilic portion 320 and flow away along the fins under gravity. This allows the air source heat pump heat exchanger to have anti-frost performance while avoiding the problem of water blowing and icing.

[0070] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A surface treatment method for an air source heat pump heat exchanger, characterized by, The application relates to an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method.

2. The surface treatment method of an air-source heat pump heat exchanger according to claim 1, characterized by, The application provides an air source heat pump heat exchanger surface treatment method.

3. The surface treatment method of an air source heat pump heat exchanger according to claim 1, characterized by, The application provides an air source heat pump heat exchanger surface treatment method.

4. The surface treatment method of an air-source heat pump heat exchanger according to claim 3, characterized by, The application provides an air source heat pump heat exchanger surface treatment method.

5. The surface treatment method of an air source heat pump heat exchanger according to claim 3, characterized by, The application provides an air source heat pump heat exchanger surface treatment method.

6. The surface treatment method of an air-source heat pump heat exchanger according to claim 3, characterized by, The application provides an air source heat pump heat exchanger surface treatment method.

7. The surface treatment method of an air source heat pump heat exchanger according to claim 3, wherein The application provides an air source heat pump heat exchanger surface treatment method.

8. The surface treatment method of an air source heat pump heat exchanger according to claim 1, wherein The application provides an air source heat pump heat exchanger surface treatment method.

9. The surface treatment method of an air source heat pump heat exchanger according to claim 8, characterized by, The application provides an air source heat pump heat exchanger surface treatment method.

10. An air source heat pump heat exchanger, characterised in that, The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. 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The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat pump heat exchanger surface treatment method. The application provides an air source heat

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