Air conditioner and air conditioner heat pump deicing system

Abstract

This utility model relates to the field of air conditioner technology, and discloses a heat pump defrosting system and an air conditioner. In the heat pump defrosting system, the high-temperature, high-pressure refrigerant gas discharged from the compressor is directly introduced into the defrosting pipe assembly mounted on the chassis, fully utilizing the inherent high-temperature exhaust waste heat during system operation as a heat source. This design eliminates the traditional electric heating wire method, achieving chassis defrosting with zero additional energy consumption; it eliminates the need for independent electric heating elements and a matching detection and control system, significantly reducing hardware costs and circuit complexity. The high-temperature refrigerant efficiently and evenly melts the ice layer as it flows through the chassis defrosting pipe, ensuring smooth discharge of defrosting water. This not only effectively eliminates poor defrosting, duct blockage, and heating attenuation caused by chassis icing, but also improves overall energy efficiency by directly utilizing the system's circulating energy, significantly enhancing the reliability and economy of the air conditioner under long-term heating conditions.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and in particular to a heat pump de-icing system for air conditioners and an air conditioner. Background Technology

[0002] When an air conditioning system operates in heating mode, the outdoor unit, acting as the evaporator, is under low pressure and needs to evaporate the low-temperature, low-pressure liquid refrigerant into a gaseous state. During this evaporation and heat absorption process, the surface temperature of the outdoor unit's heat exchanger fins is inevitably significantly lower than the dew point temperature of the ambient air, causing moisture in the air to continuously condense on its surface and eventually form frost. Although the system periodically performs defrosting to melt the frost, the water generated during defrosting is often difficult to completely drain from the chassis. As heating operation time increases, the water remaining in the chassis gradually freezes to form an ice layer. This chassis icing problem accumulates and worsens, hindering the normal drainage of defrosting water, creating a vicious cycle; furthermore, in severe cases, it can lead to poor defrosting, blocked air ducts, and a significant reduction in heating capacity. The current industry-standard solution is to install electric heating wires in specific areas of the chassis, activating heating to melt the ice when icing is detected. However, this solution, relying on external electric heating elements, increases additional hardware costs and energy consumption. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a heat pump de-icing system for air conditioning and an air conditioner.

[0004] In a first aspect, this utility model provides a heat pump de-icing system for air conditioning, comprising: a compressor; a four-way valve connected to the exhaust port of the compressor; a condenser connected to the four-way valve via a gas collection pipe; and a de-icing pipe assembly, one end of which is connected to the exhaust port of the compressor, and the other end of which is connected to the cold outlet pipe of the condenser, wherein the de-icing pipe assembly is used to be coiled to the chassis of the air conditioner.

[0005] According to the present invention, a heat pump de-icing system for air conditioning is provided, wherein the de-icing pipe assembly includes: a de-icing pipe, one end of which is connected to the exhaust port of the compressor, and the other end of which is connected to the cold outlet pipe of the condenser, and the de-icing pipe can be coiled on the chassis.

[0006] According to the present invention, a heat pump de-icing system for air conditioning is provided, wherein the de-icing pipe assembly further includes a control valve, which is disposed on the de-icing pipe.

[0007] According to the present invention, a heat pump de-icing system for air conditioning is provided, wherein the de-icing pipe assembly further includes a one-way valve, which is disposed on the de-icing pipe.

[0008] According to the present invention, a heat pump de-icing system for air conditioning is provided, wherein the de-icing pipe assembly further includes a de-icing temperature sensor, which is connected between the chassis and the cold outlet pipe of the condenser and is used to detect the refrigerant temperature between the chassis and the cold outlet pipe of the condenser.

[0009] According to the present invention, an air conditioning heat pump de-icing system further includes a control device connected to the control valve and used to control the working state of the control valve.

[0010] According to the present invention, a heat pump de-icing system for air conditioning is provided, wherein the control device is connected to the de-icing temperature sensor and is used to control the working state of the control valve based on the detection result of the de-icing temperature sensor.

[0011] According to the present invention, a heat pump de-icing system for air conditioning is provided, wherein the control valve includes a solenoid valve, which is disposed on the de-icing pipeline.

[0012] According to the present invention, an air conditioning heat pump de-icing system further includes: an electronic expansion valve connected to the cold outlet pipe of the condenser; and an evaporator connected to the electronic expansion valve and the return port of the compressor.

[0013] A second aspect of this utility model provides an air conditioner, including the heat pump de-icing system for air conditioning as described above.

[0014] The air conditioning heat pump defrosting system provided by this utility model includes a compressor, a four-way valve, a condenser, and a defrosting pipe assembly. The four-way valve is connected to the compressor's exhaust port and the condenser's gas collection pipe. One end of the defrosting pipe assembly is connected to the compressor's exhaust port, and the other end is connected to the condenser's cold outlet pipe. The defrosting pipe assembly is coiled to the chassis of the air conditioner.

[0015] As described above, this air conditioning heat pump defrosting system directly introduces the high-temperature, high-pressure refrigerant gas discharged from the compressor into the defrosting pipe assembly mounted on the chassis, fully utilizing the inherent high-temperature exhaust waste heat as a heat source. This design eliminates the traditional electric heating wire method, achieving chassis defrosting with zero additional energy consumption. Simultaneously, it eliminates the need for independent electric heating elements and a corresponding detection and control system, significantly reducing hardware costs and circuit complexity. The high-temperature refrigerant efficiently and evenly melts the ice layer as it flows through the chassis defrosting pipe, fundamentally solving the vicious cycle problem caused by repeated freezing of residual water and ensuring smooth discharge of defrost water. This not only effectively eliminates poor defrosting, duct blockage, and heating capacity reduction caused by chassis icing but also improves overall energy efficiency by directly utilizing the system's circulating energy, significantly enhancing the reliability and economy of the air conditioner under long-term heating conditions.

[0016] Furthermore, the air conditioner provided by this utility model includes the air conditioning heat pump de-icing system as described above, and therefore also possesses the advantages described above. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a partial structural schematic diagram of the heat pump de-icing system for air conditioning provided by this utility model.

[0019] Reference numerals: 100, compressor; 200, four-way valve; 300, condenser; 400, defrost hose assembly; 410, defrost hose; 420, control valve; 430, check valve; 440, defrost temperature sensor; 500, electronic expansion valve; 600, intake temperature sensor; 700, exhaust temperature sensor; 800, chassis. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0023] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples, to make the objectives, technical solutions, and advantages of the present invention clearer. The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The following is combined Figure 1 This invention describes a heat pump de-icing system and an air conditioner for air conditioning, as provided in an embodiment of the present invention. It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute any particular limitation on the present invention.

[0026] An embodiment of the first aspect of this utility model provides a heat pump de-icing system for air conditioning, such as... Figure 1 As shown, it includes: a compressor 100; a four-way valve 200 connected to the exhaust port of the compressor 100; a condenser 300, the gas collection pipe of the condenser 300 connected to the four-way valve 200; and a defrost pipe assembly 400, one end of which is connected to the exhaust port of the compressor 100, and the other end of which is connected to the cold outlet pipe of the condenser 300. The defrost pipe assembly 400 is used to be coiled to the chassis 800 of the air conditioner.

[0027] The air conditioning heat pump de-icing system provided by this utility model includes a compressor 100, a four-way valve 200, a condenser 300, and a de-icing pipe assembly 400. The four-way valve 200 is connected to the exhaust port of the compressor 100 and the gas collecting pipe of the condenser 300. One end of the de-icing pipe assembly 400 is connected to the exhaust port of the compressor 100, and the other end of the de-icing pipe assembly 400 is connected to the cold outlet pipe of the condenser 300. The de-icing pipe assembly 400 is coiled to the chassis 800 of the air conditioner.

[0028] As described above, this air conditioning heat pump defrosting system directly introduces the high-temperature, high-pressure refrigerant gas discharged from the compressor 100 into the defrosting pipe assembly 400 mounted on the chassis 800, fully utilizing the inherent high-temperature exhaust waste heat during system operation as a heat source. This design abandons the traditional electric heating wire method, achieving zero-energy-consumption defrosting of the chassis 800; simultaneously, it eliminates the need for independent electric heating elements and a matching detection and control system, significantly reducing hardware costs and circuit complexity. The high-temperature refrigerant, flowing through the defrosting pipes of the chassis 800, efficiently and evenly melts the ice layer, fundamentally solving the vicious cycle problem caused by repeated freezing of residual water and ensuring smooth discharge of defrost water. This not only effectively eliminates poor defrosting, duct blockage, and heating attenuation caused by icing on the chassis 800, but also improves overall energy efficiency by directly utilizing the system's circulating energy, significantly enhancing the reliability and economy of the air conditioner under long-term heating conditions.

[0029] In one embodiment of the present invention, the air conditioning heat pump de-icing system further includes: an electronic expansion valve 500, which is connected to the cold outlet pipe of the condenser 300; and an evaporator, which is connected to the electronic expansion valve 500 and the return port of the compressor 100.

[0030] When the air conditioner starts in heating mode, the four-way valve 200 activates first, switching the refrigerant flow path and putting the system into the heating cycle. Low-temperature, low-pressure gaseous refrigerant is drawn into the compressor 100, where it is compressed and transformed into a superheated gas with significantly increased temperature and extremely high pressure. This high-temperature, high-pressure gas is then transported to the indoor evaporator via the switched four-way valve 200 channel. The high-temperature refrigerant gas flows in the coils, releasing a large amount of sensible heat and latent heat of condensation through forced convection heat exchange with the indoor air, gradually condensing into a medium-temperature, high-pressure liquid. Simultaneously, it efficiently transfers heat to the indoor air, raising the indoor temperature. Subsequently, this medium-temperature, high-pressure liquid refrigerant flows through the electronic expansion valve 5. At this point, the refrigerant undergoes precise throttling and pressure reduction, causing its pressure and temperature to drop sharply, transforming into a low-temperature, low-pressure, gas-liquid two-phase mixture containing some gas. This low-temperature, low-pressure two-phase refrigerant enters the condenser 300 located on the outdoor side. As it flows within the coil of the condenser 300, it fully absorbs heat from the outdoor air and boils and evaporates, completely transforming into a low-temperature, low-pressure gas. This heat absorption process causes the surface temperature of the outdoor unit's coil to drop below the dew point, posing a risk of frosting. Finally, the low-temperature, low-pressure gaseous refrigerant flows through the four-way valve 200 again and is drawn back into the compressor 100, completing the entire heating cycle and running continuously, pumping heat from the outside to the inside.

[0031] In one embodiment of the present invention, the de-icing pipe assembly 400 includes: a de-icing pipe 410, one end of which is connected to the exhaust port of the compressor 100, and the other end of which is connected to the cold outlet pipe of the condenser 300. The de-icing pipe 410 can be coiled on the chassis 800.

[0032] Furthermore, in one embodiment of the present invention, the de-icing pipe assembly 400 further includes a control valve 420, which is disposed on the de-icing pipe 410.

[0033] like Figure 1 As shown, a de-icing pipe 410 is connected between the exhaust port of the compressor 100 and the cold outlet pipe of the condenser 300, and a control valve 420 is installed on the de-icing pipe 410. In normal heating or cooling mode, the control valve 420 is closed. In heating mode, when de-icing is required, the control valve 420 is switched to open, allowing the high-temperature, high-pressure gas discharged from the compressor 100 to flow through the de-icing pipe 410 to the cold outlet pipe of the condenser 300. During the flow, the high-temperature, high-pressure gas transfers heat to the chassis 800 via the de-icing pipe 410 mounted on the chassis 800, thus de-icing (i.e., defrosting). For example, the chassis 800 can also be used as part of an air conditioning heat pump de-icing system. The chassis 800 includes a chassis body, and a concave receiving cavity is provided at the bottom of the chassis body to accommodate the mounted de-icing pipe body.

[0034] It should be noted that this utility model does not impose any specific limitations on the specific type of control valve 420. For example, in one embodiment of this utility model, control valve 420 includes a solenoid valve, which is disposed on the de-icing pipeline 410.

[0035] In one embodiment of the present invention, the de-icing pipe assembly 400 further includes a one-way valve 430, which is disposed on the de-icing pipe 410.

[0036] For example, such as Figure 1 As shown, a one-way valve 430 is installed on the defrost line 410 and is located between the control valve 420 and the cold outlet pipe of the condenser 300. This ensures the one-way flow of refrigerant from the defrost line 410 to the cold outlet pipe of the condenser 300.

[0037] In one embodiment of the present invention, the defrosting pipe assembly 400 further includes a defrosting temperature sensor 440, which is connected between the chassis 800 and the cold outlet pipe of the condenser 300 and is used to detect the refrigerant temperature between the chassis 800 and the cold outlet pipe of the condenser 300.

[0038] Furthermore, in one embodiment of this utility model, the air conditioning heat pump de-icing system further includes: a control device, which is connected to the control valve 420 and is used to control the working state of the control valve 420.

[0039] More specifically, in one embodiment of the present invention, the control device is connected to the de-icing temperature sensor 440 and is used to control the working state of the control valve 420 based on the detection result of the de-icing temperature sensor 440.

[0040] In one embodiment of this utility model, an exhaust temperature sensor 700 is installed at the exhaust port of the compressor 100, and an intake temperature sensor 600 is installed at the return port of the compressor 100. For example, if the compressor 100 operates in heating mode for a certain period of time (e.g., more than 10 hours), the intake temperature sensor 600 detects that the intake temperature of the compressor 100 is below 0°C, the time interval between two consecutive defrost cycles is less than a preset time (e.g., less than 30 minutes), and the outdoor unit has just switched from defrosting to heating mode for a certain period of time (e.g., 2 minutes), then it is considered that a defrosting operation is required. In this state, the control device controls the opening of the control valve 420, so that the high-temperature and high-pressure gas discharged from the compressor 100 is guided to the cold outlet pipe of the condenser 300 through the defrosting pipe 410. During the flow of the high-temperature and high-pressure gas, heat can be transferred to the chassis 800 through the defrosting pipe 410 coiled on the chassis 800, and de-icing, i.e., defrosting, can be performed.

[0041] For example, during the de-icing process of chassis 800, if the temperature detection result of the de-icing sensor remains greater than 0℃ for a certain preset time (e.g., the temperature detection result of the de-icing sensor remains greater than 0℃ for 20 seconds), then the de-icing of chassis 800 is considered complete, and the control device controls the closing of control valve 420.

[0042] A second aspect of this utility model provides an air conditioner including the heat pump de-icing system for air conditioning as described above.

[0043] Furthermore, the air conditioner provided by this utility model includes the air conditioning heat pump de-icing system as described above, and therefore also possesses the advantages described above.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat pump de-icing system for air conditioning, characterized in that, include: Compressor (100); A four-way valve (200) is connected to the exhaust port of the compressor (100); A condenser (300) has a gas collection pipe connected to the four-way valve (200); A defrosting pipe assembly (400) is provided, one end of which is connected to the exhaust port of the compressor (100), and the other end of which is connected to the cold outlet pipe of the condenser (300). The defrosting pipe assembly (400) is used to be coiled to the chassis (800) of the air conditioner.

2. The air conditioning heat pump de-icing system according to claim 1, characterized in that, The de-icing pipe assembly (400) includes: The de-icing pipe (410) is connected at one end to the exhaust port of the compressor (100) and at the other end to the cold outlet pipe of the condenser (300). The de-icing pipe (410) can be coiled on the chassis (800).

3. The air conditioning heat pump de-icing system according to claim 2, characterized in that, The de-icing pipe assembly (400) also includes: A control valve (420) is provided on the de-icing pipeline (410).

4. The air conditioning heat pump de-icing system according to claim 3, characterized in that, The de-icing pipe assembly (400) also includes: A one-way valve (430) is provided on the de-icing pipeline (410).

5. The air conditioning heat pump de-icing system according to claim 4, characterized in that, The de-icing pipe assembly (400) also includes: A de-icing temperature sensor (440) is connected between the chassis (800) and the cold outlet pipe of the condenser (300) and is used to detect the refrigerant temperature between the chassis (800) and the cold outlet pipe of the condenser (300).

6. The air conditioning heat pump de-icing system according to claim 5, characterized in that, The air conditioning heat pump de-icing system also includes: A control device is connected to the control valve (420) and is used to control the working state of the control valve (420).

7. The air conditioning heat pump de-icing system according to claim 6, characterized in that, The control device is connected to the de-icing temperature sensor (440) and is used to control the working state of the control valve (420) based on the detection result of the de-icing temperature sensor (440).

8. The air conditioning heat pump de-icing system according to any one of claims 3 to 7, characterized in that, The control valve (420) includes: A solenoid valve is installed on the de-icing pipeline (410).

9. The air conditioning heat pump de-icing system according to claim 8, characterized in that, The air conditioning heat pump de-icing system also includes: An electronic expansion valve (500) is connected to the cold outlet pipe of the condenser (300); An evaporator, which is connected to the return port of the electronic expansion valve (500) and the compressor (100).

10. An air conditioner, characterized in that, include: The air conditioning heat pump de-icing system as described in any one of claims 1 to 9.

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