Air conditioner heat pump defrosting system and air conditioner

Abstract

The utility model relates to air conditioner technical field discloses a kind of air-conditioning heat pump defrosting system and air conditioner.The air-conditioning heat pump defrosting system includes compressor, four-way valve, condenser and defrosting pipeline assembly.Four-way valve is connected with the exhaust port of compressor and the gas collector of condenser.The one end of defrosting pipeline assembly is connected with the exhaust port of compressor, and the other end of defrosting pipeline assembly is connected with the cold out pipe of condenser.By introducing defrosting pipeline assembly, the high-temperature high-pressure gas discharged by compressor is directly introduced to the cold out pipe of condenser to defrost under the premise of not switching four-way valve and not interrupting normal heating cycle of air conditioner.On the one hand, the continuous operation of indoor unit heating function is maintained, and uninterrupted indoor heating is ensured.On the other hand, the temperature of indoor evaporator is prevented from sudden drop due to refrigeration mode operation to produce cold quantity, and the phenomenon of cold air invading indoor through air deflector gap is completely eliminated, so as to improve the comfort and use experience of user during defrosting.

Description

Technical Field

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

[0002] When an air conditioner is operating in heating mode, especially under low-temperature conditions, frost inevitably forms on the surface of the outdoor unit's heat exchanger. As the frost layer thickens, the resulting thermal resistance increases significantly, leading to a sharp drop in heat exchange efficiency. Therefore, defrosting is necessary when the frost layer accumulates to a certain level. However, current conventional defrosting methods require switching the system from heating mode to cooling mode, guiding the high-temperature, high-pressure refrigerant gas discharged from the compressor to the outdoor heat exchanger for defrosting. This switching process not only directly interrupts the indoor unit's heating function, but also, due to the sudden drop in temperature of the indoor evaporator, the generated cold air can easily escape into the indoor environment through gaps in components such as the air deflector, causing a noticeable intrusion of cold air and resulting in a significant decrease in comfort and a poor user experience. Utility Model Content

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

[0004] In a first aspect, this utility model provides a heat pump defrosting 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 defrosting pipeline 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.

[0005] According to the present invention, a heat pump defrosting system for air conditioning is provided, wherein the defrosting pipeline assembly includes: a pipeline body, 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.

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

[0007] According to the present invention, a heat pump defrosting system for air conditioning is provided, wherein the control valve includes a solenoid valve, which is disposed on the pipeline body.

[0008] According to the present invention, an air conditioning heat pump defrosting 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.

[0009] According to the present invention, an air conditioning heat pump defrosting system further includes an exhaust temperature sensor, which is disposed at the exhaust port of the compressor.

[0010] According to the present invention, a heat pump defrosting system for air conditioning is provided, the heat pump defrosting system for air conditioning further includes: a suction temperature sensor, the suction temperature sensor being disposed at the return port of the compressor.

[0011] According to the present invention, an air conditioning heat pump defrosting system further includes a control device, which is connected to the four-way valve and is used to control the working state of the four-way valve.

[0012] According to the present invention, a heat pump defrosting system for air conditioning is provided, wherein the control device is connected to the control valve and is used to control the working state of the control valve.

[0013] A second aspect of this utility model provides an air conditioner, including the heat pump defrosting 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 pipeline 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 pipeline assembly is connected to the compressor's exhaust port, and the other end of the defrosting pipeline assembly is connected to the condenser's cold outlet pipe.

[0015] As described above, by introducing a defrosting piping assembly, the high-temperature, high-pressure gas discharged from the compressor is directly guided to the cold outlet pipe of the condenser for defrosting without switching the four-way valve or interrupting the normal heating cycle of the air conditioner. This design effectively avoids the core drawback of traditional defrosting methods that require switching to cooling mode: on the one hand, it maintains the continuous operation of the indoor unit's heating function, ensuring uninterrupted indoor heating; on the other hand, it fundamentally avoids the cold air generated by the sudden drop in indoor evaporator temperature caused by operating in cooling mode, and completely eliminates the phenomenon of cold air intruding into the room through the gaps in the air guide plate, thereby significantly improving the user's comfort and experience during defrosting.

[0016] Furthermore, the air conditioner provided by this utility model includes the air conditioning heat pump defrosting system 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 defrosting system for air conditioners provided by this utility model.

[0019] Reference numerals: 100, compressor; 200, four-way valve; 300, condenser; 400, defrost piping assembly; 410, piping body; 420, control valve; 500, electronic expansion valve; 600, exhaust temperature sensor; 700, intake temperature sensor. 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 with Figure 1 This invention describes a heat pump defrosting system and 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 defrosting system for air conditioners, such as... Figure 1 It includes: a compressor 100; a four-way valve 200 connected to the exhaust port of the compressor 100; a condenser 300, the gas collecting pipe of the condenser 300 connected to the four-way valve 200; and a defrost piping 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.

[0027] The air conditioning heat pump defrosting system provided by this utility model includes a compressor 100, a four-way valve 200, a condenser 300, and a defrosting pipeline 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 defrosting pipeline assembly 400 is connected to the exhaust port of the compressor 100, and the other end of the defrosting pipeline assembly 400 is connected to the cold outlet pipe of the condenser 300.

[0028] As described above, by introducing the defrosting piping assembly 400, the high-temperature, high-pressure gas discharged from the compressor 100 is directly guided to the cold outlet pipe of the condenser 300 for defrosting without switching the four-way valve 200 or interrupting the normal heating cycle of the air conditioner. This design effectively avoids the core drawback of traditional defrosting methods that require switching to cooling mode: on the one hand, it maintains the continuous operation of the indoor unit's heating function, ensuring uninterrupted indoor heating; on the other hand, it fundamentally avoids the cold air generated by the sudden drop in indoor evaporator temperature caused by operating in cooling mode, and completely eliminates the phenomenon of cold air intruding into the room through the gaps in the air guide plate, thereby significantly improving the user's comfort and experience during defrosting.

[0029] In one embodiment of the present invention, the air conditioning heat pump defrosting 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 defrosting pipeline assembly 400 includes: a pipeline body 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.

[0032] Furthermore, in one embodiment of the present invention, the defrosting pipeline assembly 400 further includes a control valve 420, which is disposed on the pipeline body 410.

[0033] like Figure 1 As shown, a pipe body 410 connects the discharge port of the compressor 100 and the cold outlet pipe of the condenser 300, and a control valve 420 is installed on the pipe body 410. In normal heating mode, the control valve 420 is closed, the four-way valve 200 is in the heating mode open state, and the compressor 100, condenser 300, electronic expansion valve 500 and evaporator can operate normally for heating. When defrosting is required, the four-way valve 200 is locked, that is, the four-way valve 200 remains in the heating mode open state. At the same time, the control valve 420 is opened, and the high-temperature and high-pressure gas discharged from the compressor 100 is directly diverted to the cold outlet pipe of the condenser 300 for defrosting.

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

[0035] In one embodiment of the present invention, the air conditioning heat pump defrosting system further includes a control device, which is connected to the four-way valve 200 and is used to control the working state of the four-way valve 200.

[0036] In one embodiment of this utility model, the control device is connected to the control valve 420 and is used to control the working state of the control valve 420.

[0037] In other words, the control device is connected to both the four-way valve 200 and the control valve 420. The control device can control the operating states of both the four-way valve 200 and the control valve 420. For example, the control device can switch between heating and cooling modes by controlling the operating state of the four-way valve 200. When defrosting is required in heating mode, the four-way valve 200 is kept in heating mode operation, while the control valve 420 is opened, allowing the high-temperature, high-pressure gas discharged from the compressor 100 to be directly diverted to the cold outlet pipe of the condenser 300 for defrosting.

[0038] In one embodiment of this utility model, such as Figure 1As shown, the air conditioning heat pump defrosting system also includes an exhaust temperature sensor 600, which is located at the exhaust port of the compressor 100. For example, a control device is connected to the exhaust temperature sensor 600 and the electronic expansion valve 500, and can control the opening degree of the electronic expansion valve 500 based on the detection result of the exhaust temperature sensor 600.

[0039] In another embodiment of the present invention, the air conditioning heat pump defrosting system further includes: a suction temperature sensor 700, which is disposed at the return port of the compressor 100.

[0040] The suction temperature sensor 700 is used to detect the actual refrigerant temperature at the compressor 100 return port, and is used to monitor and control the system's operating status. In a system controlled by the electronic expansion valve 500, the suction temperature is combined with the evaporator outlet temperature to calculate superheat, dynamically adjusting the opening of the electronic expansion valve 500 to ensure efficient evaporator utilization and prevent liquid slugging. It can also be used to diagnose evaporator problems, such as evaporator frosting, insufficient airflow, or blockage, which can lead to low suction temperatures; data from the suction temperature sensor 700 can assist in troubleshooting.

[0041] A second aspect of this utility model provides an air conditioner, including the heat pump defrosting system for air conditioning as described above.

[0042] Furthermore, the air conditioner provided by this utility model includes the air conditioning heat pump defrosting system described above, and therefore also possesses the advantages described above.

[0043] 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 defrosting 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 piping 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).

2. The air conditioning heat pump defrosting system according to claim 1, characterized in that, The defrosting piping assembly (400) includes: Pipe body (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).

3. The air conditioning heat pump defrosting system according to claim 2, characterized in that, The defrosting piping assembly (400) also includes: A control valve (420) is disposed on the pipeline body (410).

4. The air conditioning heat pump defrosting system according to claim 3, characterized in that, The control valve (420) includes: A solenoid valve is mounted on the pipeline body (410).

5. The air conditioning heat pump defrosting system according to claim 4, characterized in that, The air conditioning heat pump defrosting 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).

6. The air conditioning heat pump defrosting system according to claim 5, characterized in that, The air conditioning heat pump defrosting system also includes: An exhaust temperature sensor (600) is disposed at the exhaust port of the compressor (100).

7. The air conditioning heat pump defrosting system according to claim 6, characterized in that, The air conditioning heat pump defrosting system also includes: A suction temperature sensor (700) is provided at the return port of the compressor (100).

8. The air conditioning heat pump defrosting system according to any one of claims 3 to 7, characterized in that, The air conditioning heat pump defrosting system also includes: A control device is connected to the four-way valve (200) and is used to control the working state of the four-way valve (200).

9. The air conditioning heat pump defrosting system according to claim 8, characterized in that, The control device is connected to the control valve (420) and is used to control the working state of the control valve (420).

10. An air conditioner, characterized in that, Including the air conditioning heat pump defrosting system as described in any one of claims 1 to 9.

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