Refrigeration equipment

Abstract

The utility model relates to the technical field of air treatment, in particular to refrigeration equipment, and aims to solve the problem of high cost of a copper pipe for transmitting a refrigerant in the conventional refrigeration equipment. In order to achieve the purpose, the refrigeration equipment comprises a compressor, a condenser, a throttling device and an evaporator which are sequentially connected through refrigerant pipes so as to form a refrigeration loop allowing refrigerants to circularly flow in the refrigeration loop. At least one of the refrigerant pipe, the condenser and the evaporator is a metal pipe with a graphene layer; a connecting layer is arranged on the surface of the metal tube, and the connecting layer is arranged to be capable of connecting the metal tube and the graphene layer. By adopting the metal pipe with the graphene layer as at least one part of the refrigerant pipe, the condenser or the evaporator, the manufacturing cost of the refrigeration equipment is remarkably reduced, and meanwhile, the efficient heat conduction performance is kept. The graphene layer not only improves the heat conductivity of the refrigerant pipe, but also enhances the corrosion resistance and wear resistance of the refrigerant pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of air treatment, and specifically provides a refrigeration device. Background Art

[0002] Existing refrigeration equipment mainly includes an evaporator, a condenser, a throttling device, and a compressor. The refrigerant enters the compressor at a low pressure, where it is compressed into a high-temperature, high-pressure gas. The high-temperature, high-pressure refrigerant gas flows into the condenser, where, with the help of a fan, the refrigerant releases heat to the surrounding environment, thereby cooling down and turning into a liquid. The liquid refrigerant passes through a throttling device (such as an expansion valve), and the pressure drops rapidly, at which point the refrigerant becomes low-temperature and low-pressure. The low-temperature, low-pressure refrigerant enters the evaporator, where it absorbs heat from the surrounding air, causing the water vapor in the air to condense into water droplets when it is cooled and collected in the water storage tank.

[0003] Copper pipes are commonly used to transport refrigerant within refrigeration equipment. This is due to their high thermal conductivity, which means they can efficiently transfer heat. Furthermore, copper is compatible with and resists corrosion from most refrigerants and their lubricants, which helps extend the life of the refrigeration system. However, the rising price of copper and other raw materials has created significant challenges for the industry in terms of product pricing.

[0004] Accordingly, this field requires a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problems and the problem that the copper tubes used for transmitting refrigerant in the existing refrigeration equipment are relatively expensive.

[0006] The utility model provides a refrigeration device, which includes a compressor, a condenser, a throttling device and an evaporator connected in sequence through a refrigerant pipe to form a refrigeration circuit allowing the refrigerant to circulate therein; wherein, at least one of the refrigerant pipe, the condenser and the evaporator is a metal pipe with a graphene layer; a connecting layer is provided on the surface of the metal pipe, and the connecting layer is configured to be able to connect the metal pipe and the graphene layer.

[0007] By employing the above technical solution, the refrigeration equipment of the present invention significantly reduces manufacturing costs while maintaining efficient thermal conductivity by using a metal tube with a graphene layer as at least a portion of the refrigerant tube, condenser, or evaporator. The graphene layer not only improves the thermal conductivity of the refrigerant tube but also enhances its corrosion and wear resistance. The metal tube and the graphene layer are connected by a connecting layer, making the connection between the metal tube and the graphene layer more stable.

[0008] In a specific embodiment of the above refrigeration equipment, the refrigerant pipe, the condenser and the evaporator are all metal pipes with a graphene layer.

[0009] Using this technical solution, the refrigerant pipes, condenser, and evaporator are all replaced with graphene-coated metal pipes, further improving the performance of the entire refrigeration system. This comprehensive design maximizes the excellent properties of graphene, further reducing manufacturing costs while significantly improving the system's thermal efficiency, corrosion resistance, and wear resistance.

[0010] In a specific embodiment of the above refrigeration device, the connection layer on the outer peripheral surface of the metal tube is a frosted layer, and the graphene layer includes an outer graphene layer coated on the frosted layer.

[0011] In the above technical solution, the frosted connecting layer on the outer circumferential surface of the metal tube, coated with a graphene layer, strengthens the bonding between the graphene and the metal tube, preventing it from falling off during long-term use. The frosted layer increases the specific surface area, allowing the graphene layer to adhere more firmly and improving heat exchange efficiency.

[0012] In the specific implementation of the above refrigeration equipment, the frosted layer is formed by a sandblasting process.

[0013] In the case of adopting the above technical solution, the sandblasting process for processing the frosted layer is not only simple and low-cost, but also can accurately control the roughness and thickness of the frosted layer, ensuring that the graphene layer can be evenly and tightly attached to the surface of the metal tube. This process method improves production efficiency and reduces processing difficulty.

[0014] In a specific embodiment of the above-mentioned refrigeration device, the graphene layer includes an inner graphene layer surrounding the inner circumferential surface of the metal tube.

[0015] When adopting the above technical solution, adding an inner graphene layer to the inner surface of the metal tube not only improves the heat conduction efficiency of the metal tube, but also helps prevent the corrosion and wear of the metal tube by the refrigerant, further improving the stability and durability of the refrigeration system.

[0016] In a specific embodiment of the above refrigeration device, the graphene layer has a super-hydrophobic porous nanostructure.

[0017] When the above technical solution is adopted, the graphene layer with a porous nanostructure and super-hydrophobicity can effectively prevent water from condensing on the tube wall and reduce the corrosion of water on the metal tube, thereby avoiding the energy efficiency reduction and bacterial growth problems caused by the accumulation of water droplets.

[0018] In a specific embodiment of the above-mentioned refrigeration equipment, the graphene layer is processed from a graphene slurry with a content of greater than or equal to 30%; and / or the processing temperature of the graphene layer is 220° C.-260° C.

[0019] When adopting the above technical solution, the graphene layer is processed using a graphene slurry with a content of greater than or equal to 30%, and the processing temperature is controlled between 220°C and 260°C, which not only ensures the thickness and uniformity of the graphene layer, but also avoids damage to the metal tube substrate caused by high temperature.

[0020] In a specific embodiment of the above-mentioned refrigeration equipment, the thickness of the graphene layer is 10 μm-30 μm.

[0021] By adopting the above technical solution, the thickness of the graphene layer is controlled between 10μm and 30μm, ensuring excellent thermal conductivity and mechanical strength while avoiding the increased costs and processing difficulties caused by excessive thickness. This thickness of graphene layer can reduce overall manufacturing costs while maintaining the performance of the refrigeration system, thereby improving the product's market competitiveness.

[0022] In the specific implementation of the above refrigeration equipment, the metal tube includes an aluminum tube, an iron tube, or a stainless steel tube.

[0023] Adopting the above technical solution, using aluminum, iron, or stainless steel tubes as the base metal tubes not only reduces manufacturing costs but also broadens the material selection for refrigeration equipment. These metal tube materials offer excellent mechanical and processing properties, meeting the diverse needs of refrigeration equipment. Furthermore, combined with the use of graphene layers, these metal tubes also achieve significant improvements in thermal conductivity, corrosion resistance, and wear resistance.

[0024] In the specific implementation of the above-mentioned refrigeration equipment, the refrigeration equipment is a dehumidifier, an air conditioner or a refrigerator.

[0025] When the above technical solution is adopted, the refrigeration equipment of the present invention is applied to actual products such as dehumidifiers, air conditioners or refrigerators, and iron pipes or aluminum pipes can be used instead of copper pipes, further reducing the production cost of the above equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the dehumidifier of the utility model;

[0028] Figure 2 This is a schematic structural diagram of the wall of the refrigerant pipe in the dehumidifier of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of the tube wall of the condenser in the dehumidifier of the utility model;

[0030] Figure 4 It is a structural schematic diagram of the tube wall of the evaporator in the dehumidifier of the utility model.

[0031] List of reference numerals: 1 - compressor; 2 - evaporator; 21 - collecting device; 3 - throttling device; 4 - condenser; 5 - refrigerant pipe; 6 - frosted layer; 7 - outer graphene layer; 8 - inner graphene layer. DETAILED DESCRIPTION

[0032] The following describes preferred embodiments of the present application with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely intended to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art may adjust these embodiments as needed to suit specific applications. For example, although the refrigeration equipment in this specification is described in conjunction with a dehumidifier, other refrigeration equipment, such as an air conditioner or a refrigerator, can obviously be used in the present application.

[0033] It should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "disposed", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or other connection; it can be a direct connection or an indirect connection through an intermediate medium. It should be understood that the orientation or positional relationship indicated by the terms "outer", "lower", "inner", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0034] To address the high cost of copper pipes used to transport refrigerant in existing refrigeration equipment, the present invention provides a refrigeration device comprising a compressor 1, a condenser 4, a throttling device 3, and an evaporator 2, connected in sequence by a refrigerant pipe 5 to form a refrigeration circuit through which the refrigerant circulates. At least one of the refrigerant pipe 5, condenser 4, and evaporator 2 is a metal pipe having a graphene layer; a connecting layer is provided on the surface of the metal pipe, configured to connect the metal pipe to the graphene layer. By utilizing a metal pipe having a graphene layer as at least a portion of the refrigerant pipe 5, condenser 4, or evaporator 2, the refrigeration device significantly reduces manufacturing costs while maintaining efficient thermal conductivity. The graphene layer not only improves the thermal conductivity of the metal pipe but also enhances its corrosion and wear resistance. The connecting layer connects the metal pipe and the graphene layer, further stabilizing the connection between the metal pipe and the graphene layer.

[0035] Figure 1 It is a structural schematic diagram of an embodiment of the dehumidifier of the utility model; Figure 2 This is a schematic structural diagram of the wall of the refrigerant pipe in the dehumidifier of the present invention; Figure 3 This is a schematic diagram of the structure of the tube wall of the condenser in the dehumidifier of the utility model; Figure 4 It is a structural schematic diagram of the tube wall of the evaporator in the dehumidifier of the utility model.

[0036] like Figure 1 As shown, in one or more embodiments, the refrigeration device is a dehumidifier. Alternatively, the refrigeration device may be an air conditioner or a refrigerator. Of course, the refrigeration device may also be other devices that utilize the high thermal conductivity of copper tubes. By applying the refrigeration device of the present invention to actual products such as dehumidifiers, air conditioners, or refrigerators, iron or aluminum tubes can be used instead of copper tubes, further reducing the production cost of the dehumidifier. It should be noted that the refrigeration device may also be other suitable heat pump refrigeration devices.

[0037] like Figure 1As shown, in one or more embodiments, the dehumidifier includes a compressor 1, a condenser 4, a throttling device 3, and an evaporator 2. The compressor 1, condenser 4, throttling device 3, and evaporator 2 are connected in sequence via a refrigerant pipe 5, forming a refrigeration circuit that allows a refrigerant (e.g., R34a, etc.) to circulate therein. Specifically, the main function of the compressor 1 is to absorb and compress a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure liquid refrigerant, thereby providing power for the refrigeration cycle. The compressor 1 compresses the refrigerant by driving a piston through the operation of a motor, thereby completing the compression process. The main function of the condenser 4 is to convert the high-temperature, high-pressure liquid refrigerant into a medium-temperature, high-pressure liquid refrigerant by releasing heat within the fins of the condenser 4. The throttling device 3 is a flow regulator whose main function is to control the flow of the refrigerant to reduce the refrigerant pressure. Through the throttling effect of the throttling device 3, the medium-temperature, high-pressure liquid refrigerant can be converted into a medium-temperature, low-pressure liquid refrigerant, which is conducive to absorbing heat in the evaporator 2. The throttling device 3 can be, but is not limited to, a manual throttle valve, a constant pressure expansion valve, a float valve, an orifice plate, a capillary tube, an electronic expansion valve, a thermal expansion valve, etc. The main function of the evaporator 2 is to evaporate the medium-temperature, low-pressure liquid refrigerant into a low-temperature, low-pressure gaseous refrigerant. The low-temperature, low-pressure gaseous refrigerant is re-absorbed by the compressor, and a new refrigeration cycle begins. In this process, the air in the external environment exchanges heat with the surface of the evaporator 2 and is cooled, while the moisture in the air condenses into water droplets, thereby reducing the humidity of the indoor environment. In one or more embodiments, a collection device 21 is provided on the lower side of the evaporator 2. The collection device 21 can be a water collection tray or other suitable components. The setting of the collection device 21 can collect the condensed water flowing down from the evaporator 2 to achieve the purpose of dehumidifying the room. Alternatively, the collection device 21 can also include components such as a drain pipe and a drain pump connected to the water collection tray to discharge the condensed water in the water collection tray in time. In one or more embodiments, a fan is provided on one side of the condenser 4 to cool the condenser 4, thereby improving the heat exchange efficiency of the condenser 4. Alternatively, a fan may not be provided on one side of the condenser 4, and other methods may be used to cool the condenser 4, such as water-cooled heat exchange tubes.

[0038] In one or more embodiments, the refrigerant tube 5 is an aluminum tube with a graphene layer. Using an aluminum tube instead of the original copper tube not only reduces the manufacturing cost, but also enriches the material selection range of the refrigeration equipment. The aluminum tube has good mechanical properties and processing properties, and can meet the various use requirements of the refrigeration equipment. At the same time, combined with the use of the graphene layer, the aluminum tube has also been significantly improved in terms of thermal conductivity, corrosion resistance and wear resistance. In terms of thermal conductivity, the thermal conductivity of copper is about 401W / (m·K), while the thermal conductivity of pure aluminum is 237W / (m·K). The thermal conductivity coefficient of pure, defect-free single-layer graphene is as high as 5300W / (m·K), so it is possible to use a graphene layer on the aluminum tube to achieve efficiency better than copper. Alternatively, the refrigerant tube 5 can also be selected from other suitable metal tubes such as iron pipes or stainless steel pipes.

[0039] like Figure 2 As shown, in one or more embodiments, the connecting layer on the outer circumferential surface of the refrigerant tube 5 is formed into a frosted layer 6 by sandblasting. A mixture of graphene slurry and water containing at least 30% graphene slurry is sprayed on the outer surface of the frosted layer 6. The refrigerant tube 5 with the graphene slurry is then heated at a temperature between 220°C and 260°C, causing the graphene slurry on the outer surface of the refrigerant tube 5 to solidify into an outer graphene layer 7. Using sandblasting to form the frosted layer 6 is not only simple and cost-effective, but also allows for precise control of the roughness and thickness of the frosted layer 6, ensuring that the graphene layer adheres evenly and tightly to the surface of the aluminum tube. By forming the frosted layer 6 on the outer circumferential surface of the aluminum tube and coating it with the graphene layer, the bonding strength between the graphene and the aluminum tube is enhanced, preventing the problem of detachment during long-term use. The frosted layer 6 increases the specific surface area, allowing the graphene layer to adhere more firmly and improving heat exchange efficiency. Alternatively, the outer surface of the aluminum tube can be polished to form a frosted layer 6. Alternatively, the frosted layer 6 can be omitted and the outer graphene layer 7 can be directly provided on the aluminum tube. Alternatively, the heating temperature of the graphene slurry is preferably 230°C, but can also be 220°C, 225°C, 235°C, 240°C, 250°C, etc.

[0040] It should be noted that the sandblasting process is to impact and cut the outer surface of the refrigerant pipe 5 by spraying abrasive particles (such as quartz sand) at high speed. This not only can completely remove rust, oxides, oil stains and dirt on the surface of the refrigerant pipe 5, but also can form an uneven texture on the surface of the refrigerant pipe 5, thereby increasing its roughness. The surface roughness value of the refrigerant pipe 5 after sandblasting is between 40μm and 100μm. Alternatively, the surface roughness of the refrigerant pipe 5 can be selected according to the specific application environment.

[0041] like Figure 2As shown, in one or more embodiments, the thickness of the outer graphene layer 7 on the outside of the refrigerant tube 5 is 10 μm-30 μm. Preferably, the thickness of the outer graphene layer 7 of the refrigerant tube 5 is 15 μm. Controlling the thickness of the outer graphene layer 7 of the refrigerant tube 5 between 10 μm and 30 μm ensures excellent thermal conductivity and mechanical strength while avoiding the increased cost and processing difficulty caused by excessive thickness. This thickness of the outer graphene layer 7 of the refrigerant tube 5 can reduce overall manufacturing costs while ensuring the performance of the refrigeration system, thereby improving the market competitiveness of the product. Alternatively, the thickness of the outer graphene layer 7 of the refrigerant tube 5 can be 8 μm, 12 μm, 14 μm, 20 μm, 35 μm, etc. Of course, the thinner the outer graphene layer 7, the correspondingly poorer thermal conductivity, lower cost, and higher processing difficulty. The thicker the outer graphene layer 7, the correspondingly better thermal conductivity, higher cost, and lower processing difficulty. Therefore, the specific thickness of the outer graphene layer 7 can be selected based on actual usage. The outer graphene layer 7 of the refrigerant tube 5 has a superhydrophobic, porous nanostructure. This effectively prevents water condensation on the outer graphene layer 7 of the refrigerant tube 5, reducing water corrosion on the metal tube, thereby avoiding energy efficiency degradation and bacterial growth caused by water droplet accumulation. Alternatively, the outer graphene layer 7 of the refrigerant tube 5 can also have other structures depending on the specific usage.

[0042] In one or more embodiments, the graphene slurry includes 30% pure graphene, 1% layered double hydroxide and metal framework polymer, 5% mesoporous silica, 44% resin, 15% filler and 5% diluent. Alternatively, the graphene slurry can also adopt other formulas, as long as it can be attached to the inner and outer sides of the aluminum tube to form the outer graphene layer 7. For example, the graphene slurry includes 35% pure graphene, 1% layered double hydroxide and metal framework polymer, 5% mesoporous silica, 39% resin, 15% filler and 5% diluent. For another example, the graphene slurry includes 40% pure graphene, 1% layered double hydroxide and metal framework polymer, 5% mesoporous silica, 39% resin, 10% filler and 5% diluent. Alternatively, the graphene slurry includes 30%-44% pure graphene, 1% layered double hydroxide and metal framework polymer, 5% mesoporous silica, 30%-44% resin, 15%-30% filler and 5%-8% diluent.

[0043] The following is a detailed introduction to the processing steps for setting the outer graphene layer 7 on the outside of the refrigerant tube 5. In one or more embodiments, the outside of the refrigerant tube 5 is first cleaned with an organic solvent (alcohol, methanol, etc.). Then, the outside of the refrigerant tube 5 is ultrasonically cleaned. In this way, the oily substances in the refrigerant tube 5 can be effectively removed. Then, the outside of the refrigerant tube 5 is sandblasted to form a frosted layer 6. Then, a mixture of graphene slurry and water is sprayed onto the outside of the refrigerant tube 5. Then, the mixture of graphene slurry and water on the outside of the refrigerant tube 5 is heated at 230°C to form an outer graphene layer 7.

[0044] like Figure 3 and Figure 4 As shown, in one or more embodiments, the condenser 4 and the evaporator 2 are also metal tubes with a graphene layer. That is, the refrigerant tube 5, the condenser 4 and the evaporator 2 are all replaced with metal tubes with a graphene layer, further improving the performance of the entire refrigeration system. This comprehensive design maximizes the excellent properties of graphene and significantly improves the thermal efficiency, corrosion resistance and wear resistance of the system. Alternatively, one of the condenser 4 and the evaporator 2 may be a metal tube with a graphene layer. Alternatively, the condenser 4 and the evaporator 2 may both be ordinary metal tubes, and the refrigerant tube 5 may be a metal tube with a graphene layer.

[0045] like Figure 3 and Figure 4 As shown, in one or more embodiments, the condenser 4 and evaporator 2 are aluminum tubes. Using aluminum tubes not only reduces manufacturing costs but also broadens the range of materials available for dehumidifiers. Aluminum tubes offer excellent mechanical and processing properties, meeting the diverse needs of various refrigeration equipment. Furthermore, combined with the use of graphene layers, aluminum tubes significantly improve thermal conductivity, corrosion resistance, and wear resistance. Alternatively, the refrigerant tube 5 may be made of iron or stainless steel.

[0046] In one or more embodiments, the condenser 4 and the evaporator 2 are immersed in a mixture of graphene slurry and water, so that the outer and inner sides of the condenser 4 and the evaporator 2 can be attached with a mixture of graphene slurry and water with at least 30% graphene slurry. Subsequently, the condenser 4 and the evaporator 2 with the graphene slurry are heated at a temperature of 220°C-260°C, so that the graphene slurry on the outer side of the aluminum tube is solidified into an outer graphene layer 7, and the graphene slurry on the inner side of the aluminum tube is solidified into an inner graphene layer 8. Adding the inner graphene layer 8 to the inner peripheral surface of the aluminum tube not only improves the heat conduction efficiency of the aluminum tube, but also helps to prevent the corrosion and wear of the aluminum tube by the refrigerant, further improving the stability and durability of the refrigeration system. Alternatively, a connecting layer is provided on the outer peripheral surface of the condenser 4 and the evaporator 2, and the connecting layer is a frosted layer 6 formed by sandblasting. Alternatively, the outer peripheral surface of the condenser 4 and the evaporator 2 can be formed into a frosted layer 6 by grinding. Alternatively, the heating temperature of the graphene slurry is preferably 230°C, and of course it can also be 220°C, 225°C, 235°C, 240°C, 250°C, etc.

[0047] In one or more embodiments, the thickness of the outer graphene layer 7 on the outside of the condenser 4 and the evaporator 2 is 15 μm. Alternatively, the thickness of the outer graphene layer 7 on the outside of the condenser 4 and the evaporator 2 is 10 μm-30 μm. Controlling the thickness of the outer graphene layer 7 on the outside of the condenser 4 and the evaporator 2 between 10 μm and 30 μm not only ensures its excellent thermal conductivity and mechanical strength, but also avoids the cost increase and increased processing difficulty caused by excessive thickness. The outer graphene layer 7 on the outside of the condenser 4 and the evaporator 2 of this thickness can reduce the overall manufacturing cost while ensuring the performance of the refrigeration system and improve the market competitiveness of the product. Alternatively, the thickness of the outer graphene layer 7 on the outside of the condenser 4 and the evaporator 2 can be 8 μm, 12 μm, 14 μm, 20 μm, 35 μm, etc. Of course, the thinner the thickness of the outer graphene layer 7, the worse the thermal conductivity, the lower the cost, and the higher the processing difficulty. The greater the thickness of the outer graphene layer 7, the better the thermal conductivity, the higher the cost, and the lower the processing difficulty. Therefore, the specific thickness of the outer graphene layer 7 can be selected according to the actual usage. The outer graphene layer 7 on the outside of the condenser 4 and the evaporator 2 has a super-hydrophobic porous nanostructure, which can effectively prevent water from condensing on the tube wall and reduce the erosion of water on the metal tube, thereby avoiding the energy efficiency reduction and bacterial growth problems caused by the accumulation of water droplets. Alternatively, the outer graphene layer 7 on the outside of the condenser 4 and the evaporator 2 can also be selected from other structures according to the specific usage.

[0048] like Figure 3 and Figure 4As shown, in one or more embodiments, the thickness of the inner graphene layer 8 inside the condenser 4 and the evaporator 2 is 15 μm. Alternatively, the thickness of the inner graphene layer 8 inside the condenser 4 and the evaporator 2 can be in the range of 10 μm-30 μm. Controlling the thickness of the inner graphene layer 8 inside the condenser 4 and the evaporator 2 between 10 μm and 30 μm not only ensures its excellent thermal conductivity and mechanical strength, but also avoids the cost increase and increased processing difficulty caused by excessive thickness. The inner graphene layer 8 inside the condenser 4 and the evaporator 2 of this thickness can reduce the overall manufacturing cost while ensuring the performance of the refrigeration system, thereby improving the market competitiveness of the product. Alternatively, the thickness of the inner graphene layer 8 inside the condenser 4 and the evaporator 2 can be 8 μm, 12 μm, 14 μm, 20 μm, 35 μm, etc. Of course, the thinner the thickness of the inner graphene layer 8, the worse the thermal conductivity, the lower the cost, and the higher the processing difficulty. The greater the thickness of the inner graphene layer 8, the better the thermal conductivity, the higher the cost, and the lower the processing difficulty. Therefore, the specific thickness of the inner graphene layer 8 can be selected according to the actual usage. The inner graphene layer 8 on the inside of the condenser 4 and the evaporator 2 has a super-hydrophobic porous nanostructure. It can effectively prevent moisture from condensing on the condenser 4 and the evaporator 2, reduce the erosion of moisture on the metal tube, and thus avoid the energy efficiency reduction and bacterial growth problems caused by the accumulation of water droplets. Alternatively, the inner graphene layer 8 on the inside of the condenser 4 and the evaporator 2 can also select other structures according to the specific usage.

[0049] The following is a detailed introduction to the processing steps for setting the graphene layer on the condenser 4 and the evaporator 2. In one or more embodiments, the condenser 4 and the evaporator 2 are first cleaned with an organic solvent (alcohol, methanol, etc.). Then, the condenser 4 and the evaporator 2 are ultrasonically cleaned to effectively remove the oily substances on the condenser 4 and the evaporator 2. Then, the condenser 4 and the evaporator 2 are immersed in a mixture of graphene slurry and water. Then, the condenser 4 and the evaporator 2 are taken out from the mixture of graphene slurry and water, and the mixture of graphene slurry and water on the condenser 4 and the evaporator 2 is heated at 230°C to form an outer graphene layer 7 and an inner graphene layer 8.

[0050] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, any of the claimed embodiments may be used in any combination throughout this application.

[0051] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A refrigeration device, characterized in that: The refrigeration equipment includes a compressor, a condenser, a throttling device and an evaporator connected in sequence through a refrigerant pipe to form a refrigeration circuit allowing the refrigerant to circulate therein; At least one of the refrigerant tube, the condenser and the evaporator is a metal tube having a graphene layer; a connecting layer is provided on the surface of the metal tube, and the connecting layer is configured to connect the metal tube and the graphene layer.

2. The refrigeration equipment according to claim 1, characterized in that The refrigerant pipe, the condenser and the evaporator are all metal pipes with a graphene layer.

3. The refrigeration equipment according to claim 1 or 2, characterized in that: The connection layer on the outer peripheral surface of the metal tube is a frosted layer, and the graphene layer includes an outer graphene layer coated on the frosted layer.

4. The refrigeration equipment according to claim 3, characterized in that The frosted layer is formed by a sandblasting process.

5. The refrigeration equipment according to claim 1 or 2, characterized in that: The graphene layer includes an inner graphene layer surrounding an inner circumferential surface of the metal tube.

6. The refrigeration equipment according to claim 1, characterized in that The graphene layer has a super-hydrophobic porous nanostructure.

7. The refrigeration equipment according to claim 1, characterized in that The graphene layer is processed from graphene slurry containing 30% or more of graphene; and / or The processing temperature of the graphene layer is 220° C.-260° C.

8. The refrigeration equipment according to claim 1, characterized in that The thickness of the graphene layer is 10 μm-30 μm.

9. The refrigeration equipment according to claim 2, characterized in that: The metal pipe includes an aluminum pipe, an iron pipe, and a stainless steel pipe.

10. The refrigeration equipment according to claim 1, characterized in that The refrigeration equipment is a dehumidifier, an air conditioner or a refrigerator.

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