Heat pump system and air conditioner

Abstract

The utility model discloses a heat pump system and an air conditioner. According to the heat pump system, a cavity and a cooling channel which are isolated are arranged in a compressor, the cavity is provided with an exhaust port and an air return port, a first heat exchanger, a throttling device and a second heat exchanger are sequentially connected, and the exhaust port, the air return port, the first heat exchanger and the second heat exchanger are all connected with a reversing assembly; a first pipeline between the reversing assembly and the second heat exchanger and / or a second pipeline between the reversing assembly and the air return port and the cooling channel are / is connected with the refrigerant adjusting device, and the refrigerant adjusting device is used for switching the flowing direction of a refrigerant flowing out of the second heat exchanger between the first flowing direction and the second flowing direction when the exhaust port communicates with the first heat exchanger. The first flow direction comprises that the air flows through the first pipeline and the second pipeline in sequence and then enters the air return port, and the second flow direction comprises that the air flows through the cooling channel and then enters the air return port. The utility model aims to reduce the temperature fluctuation in the adjusting space in the defrosting process.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat pump system and an air conditioner. Background Art

[0002] During the operation of the heat pump system, when the ambient temperature is low, the moisture in the air will condense into frost on the evaporator. At present, when the heat pump system defrosts, it usually switches the operation mode, switching the evaporator to the condenser to release heat to melt the frost. However, this method will cause the condenser to switch to the evaporator at the same time, causing the temperature of the regulated space to fluctuate, affecting the regulation effect of the heat pump system on the space. Utility Model Content

[0003] The main purpose of the utility model is to provide a heat pump system and an air conditioner, aiming to reduce the temperature fluctuation in the regulating space during the defrosting process.

[0004] To achieve the above-mentioned purpose, the utility model provides a heat pump system, which includes a reversing assembly, a compressor, a first heat exchanger, a throttling device, a second heat exchanger and a refrigerant regulating device, wherein an isolated cavity and a cooling channel are arranged in the compressor, wherein the cavity has an exhaust port and an air return port, wherein the first heat exchanger, the throttling device and the second heat exchanger are connected in sequence, and wherein the exhaust port, the air return port, the first heat exchanger and the second heat exchanger are all connected to the reversing assembly;

[0005] The first pipeline between the reversing assembly and the second heat exchanger and / or the second pipeline between the reversing assembly and the return air port, and the cooling channel are all connected to the refrigerant regulating device, and the refrigerant regulating device is used to switch the flow direction of the refrigerant flowing out of the second heat exchanger between the first flow direction and the second flow direction when the exhaust port is connected to the first heat exchanger, the first flow direction includes flowing through the first pipeline and the second pipeline in sequence and then entering the return air port, and the second flow direction includes flowing through the first pipeline and the cooling channel and then entering the return air port.

[0006] Optionally, the refrigerant regulating device comprises:

[0007] a first control valve, the first control valve being arranged in the first pipeline and / or the second pipeline;

[0008] A second control valve is connected in series with the cooling channel.

[0009] Optionally, the second control valve includes a first throttle valve, and the first throttle valve is arranged at an inlet side of the cooling channel.

[0010] Optionally, the second control valve includes an on-off valve, and the refrigerant regulating device further includes a throttling component arranged on the inlet side of the cooling channel.

[0011] Optionally, the refrigerant regulating device includes a three-way valve arranged on the first pipeline, and the reversing assembly, the second heat exchanger and the inlet of the cooling channel are respectively connected to different valve ports of the three-way valve.

[0012] Optionally, the heat pump system further includes a second throttle valve disposed between the three-way valve and the second heat exchanger or a throttling component disposed between the three-way valve and the cooling channel.

[0013] Optionally, the inlet of the cooling channel is connected to the first pipeline, and the outlet of the cooling channel is connected to the second pipeline.

[0014] Optionally, a cylinder and a first bearing are arranged in the cavity, the first bearing is arranged between the cylinder and the exhaust port, and the cooling channel passes through an area where the first bearing is located and an area where the cylinder is located.

[0015] Optionally, the first heat exchanger is an indoor heat exchanger, and the second heat exchanger is an outdoor heat exchanger; when the heat pump system switches from a heating mode to a preset defrost mode, the reversing component maintains a current state, the first control valve is closed, the throttling device is fully opened, and the first throttle valve performs throttling.

[0016] In addition, in order to achieve the above-mentioned purpose, the present application also proposes an air conditioner, which includes the heat pump system as described above.

[0017] The utility model proposes a heat pump system, in which a cooling channel isolated from a compression chamber is arranged in a compressor. When the exhaust port of the compressor is connected to the first heat exchanger, the first heat exchanger is in a condensing state. Through the regulation of the refrigerant regulating device, the refrigerant flowing out of the first heat exchanger can be throttled by the throttling device and then flow into the second heat exchanger for evaporation and then flow back to the compressor. The second heat exchanger absorbs heat in the environment to provide heat for the normal heating of the first heat exchanger. When frost appears on the second heat exchanger, the throttling device can stop throttling and the first heat exchanger can maintain a condensing state. The second heat exchanger can use the heat of the refrigerant flowing out of the first heat exchanger to melt the frost. Through the regulation of the refrigerant regulating device, the refrigerant flowing out of the second heat exchanger can flow into the cooling channel of the compressor for evaporation and then flow back to the compressor. Based on this, the first heat exchanger does not need to switch to the evaporation state during the defrosting process of the second heat exchanger. The first heat exchanger can maintain heat release to the space where it is located, effectively reducing the temperature fluctuation in the regulated space during the defrosting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an embodiment of a heat pump system of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the connection status of each component and the refrigerant flow direction of the heat pump system in the first mode;

[0020] Figure 3 for Figure 1 Schematic diagram of the connection status of each component and the refrigerant flow direction of the heat pump system in the second mode

[0021] Description of Figure Numbers:

[0022] Label name Label name 1 compressor 5 Second heat exchanger 101 Exhaust port 6 Refrigerant conditioning device 102 Air return port 61 First control valve 2 Reversing components 62 Second control valve 3 First heat exchanger 01 First pipeline 4 Throttling device 02 Second pipeline

[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The embodiment of the utility model provides a heat pump system.

[0026] In the embodiment of the present utility model, refer to Figures 1 to 3 , the heat pump system comprises a compressor 1, a reversing assembly 2, a first heat exchanger 3, a throttling device 4, a second heat exchanger 5 and a refrigerant regulating device 6, an isolated cavity and a cooling channel are arranged in the compressor 1, the cavity has an exhaust port 101 and an air return port 102, the first heat exchanger 3, the throttling device 4 and the second heat exchanger 5 are connected in sequence, the exhaust port 101, the air return port 102, the first heat exchanger 3 and the second heat exchanger 5 are all connected to the reversing assembly 2;

[0027] The first pipeline 01 between the reversing component 2 and the second heat exchanger 5 and / or the second pipeline 02 between the reversing component 2 and the return air port 102, and the cooling channel are all connected to the refrigerant regulating device 6. The refrigerant regulating device 6 is used to switch the flow direction of the refrigerant flowing out of the second heat exchanger 5 between the first flow direction and the second flow direction when the exhaust port 101 is connected to the first heat exchanger 3. The first flow direction includes flowing through the first pipeline 01 and the second pipeline 02 in sequence and then entering the return air port 102. The second flow direction includes flowing through the first pipeline 01 and the cooling channel and then entering the return air port 102.

[0028] In this embodiment, the first heat exchanger 3 is an indoor heat exchanger, and the second heat exchanger 5 is an outdoor heat exchanger. In other embodiments, the first heat exchanger 3 and the second heat exchanger 5 can both be arranged indoors.

[0029] The throttling device 4 is a throttling component with an adjustable throttling opening, such as an electronic expansion valve.

[0030] The reversing assembly 2 is used for the components connected to the exhaust port 101 and the return port 102 in the first heat exchanger 3 and the second heat exchanger 5. The reversing assembly 2 has a first operating position and a second operating position. When the reversing assembly 2 operates in the first operating position, the exhaust port 101 of the compressor 1 is connected to the first heat exchanger 3, and the return port 102 of the compressor 1 is connected to the second heat exchanger 5; when the reversing assembly 2 operates in the second operating position, the exhaust port 101 of the compressor 1 is connected to the second heat exchanger 5, and the return port 102 of the compressor 1 is connected to the first heat exchanger 3. The reversing assembly 2 may include a four-way valve or a combination of multiple other one-way valves, etc.

[0031] The cooling channel can be formed by digging a groove on the outer shell of the compressor 1, or by installing an additional pipe in the cavity. The refrigerant entering the compressor 1 from the return air port 102 can be discharged from the exhaust port 101 after being compressed in the cavity. The cavity in the compressor 1 is isolated from the cooling channel, so the refrigerant in the cooling channel can exchange heat with the cavity without mixing with the refrigerant in the cavity.

[0032] The refrigerant regulating device 6 may be an integrated device, or may include at least one device composed of more than one one-way valve, throttle valve, stop valve, solenoid valve, multi-way valve, etc. When the refrigerant regulating device 6 operates in the first state, the cooling channel is blocked, the first pipeline 01 is connected to the reversing component 2, and the second pipeline 02 is connected to the reversing component 2, and the refrigerant stops flowing through the cooling channel; when the refrigerant regulating device 6 operates in the second state, the first pipeline 01 and / or the second pipeline 02 are connected to both ends of the cooling channel, the first pipeline 01 is blocked and / or the second pipeline 02 is blocked, and the refrigerant can flow through the cooling channel. When the exhaust port 101 is connected to the first heat exchanger 3, the refrigerant flowing out of the second heat exchanger 5 flows in the first flow direction when the refrigerant regulating device 6 operates in the first state, and the refrigerant flowing out of the second heat exchanger 5 flows in the second flow direction when the refrigerant regulating device 6 operates in the second state.

[0033] The heat pump system can have at least the following two modes through the cooperation of the throttling device 4 and the refrigerant regulating device 6 and other components:

[0034] In the first mode (eg, heating mode), refer to Figure 2, the throttling device 4 is in a throttling state, the reversing assembly 2 operates in the first operating position and the refrigerant regulating device 6 is in the first state, the exhaust port 101 of the compressor 1, the first heat exchanger 3, the throttling device 4, and the second heat exchanger 5 are connected in sequence, the refrigerant flowing out of the compressor 1 flows through the first heat exchanger 3, the throttling device 4 and the second heat exchanger 5 in sequence, the refrigerant flowing out of the second heat exchanger 5 flows through the first pipeline 01 and the second pipeline 02 in sequence and flows back to the return air port 102 of the compressor 1 and then recirculates, the branch where the cooling channel is located is blocked under the regulating action of the refrigerant regulating device 6, the first heat exchanger 3 is in a condensing state, the second heat exchanger 5 is in an evaporating state, and the first heat exchanger 3 can release heat to the space where it is located.

[0035] In the second mode (e.g. defrost mode), refer to Figure 3 , the throttling device 4 is in the unthrottled state, the reversing assembly 2 operates in the first operating position, and the refrigerant regulating device 6 is in the second state. The refrigerant flowing out of the compressor 1 flows through the first heat exchanger 3, the throttling device 4 and the second heat exchanger 5 in sequence. The first heat exchanger 3 is in a condensing state. The refrigerant flowing out of the first heat exchanger 3 after condensation flows into the second heat exchanger 5. The second heat exchanger 5 can use the heat of the condensed refrigerant to melt the frost on the surface. The refrigerant flowing out of the second heat exchanger 5 can enter the cooling channel. The refrigerant in the cooling channel can evaporate under the high temperature environment of the compressor 1 and can cool the compressor 1. The refrigerant flowing out of the cooling channel flows back to the return air port 102 of the compressor 1 and then recirculates. The first heat exchanger 3 releases heat to the space where it is located, and the second heat exchanger 5 defrosts.

[0036] In the third mode (for example, the refrigeration mode), the reversing assembly 2 operates in the second operating position, the throttling device 4 is in the throttling state and the refrigerant regulating device 6 is in the first state, the refrigerant channel is blocked, the exhaust port 101 of the compressor 1, the first pipeline 01, the second heat exchanger 5, the throttling device 4, the first heat exchanger 3, the second pipeline 02, and the return air port 102 of the compressor 1 are connected in sequence, and the refrigerant discharged from the compressor 1 will not flow into the cooling channel, but directly flow into the second heat exchanger 5 for condensation. The refrigerant flowing out of the compressor 1 flows through the first pipeline 01, the second heat exchanger 5, the throttling device 4, the first heat exchanger 3, and the second pipeline 02 in sequence and then flows back to the compressor 1. The first heat exchanger 3 is in an evaporating state, the second heat exchanger 5 is in a condensing state, and the first heat exchanger 3 can release cold energy to the space where it is located.

[0037] Based on the above configuration, when the heat pump system needs to defrost the second heat exchanger 5 in the first mode and runs the second mode, the reversing component 2 can maintain its original state unchanged, thereby achieving defrosting of the second heat exchanger 5 while reducing the temperature fluctuation in the adjustment space of the first heat exchanger 3 and reducing the reversing noise of the reversing component 2.

[0038] The utility model proposes a heat pump system, in which a cooling channel isolated from a compression chamber is arranged in a compressor 1. When an exhaust port 101 of the compressor 1 is connected to a first heat exchanger 3, the first heat exchanger 3 is in a condensing state. Through the regulation of a refrigerant regulating device 6, the refrigerant flowing out of the first heat exchanger 3 can be throttled by a throttling device 4 and then flow into a second heat exchanger 5 for evaporation and then flow back to the compressor 1. The second heat exchanger 5 absorbs heat in the environment to provide heat for the normal heating of the first heat exchanger 3. When frost forms on the second heat exchanger 5, the throttling device 4 can stop throttling and the first heat exchanger 3 can maintain a condensing state. The second heat exchanger 5 can melt the frost by using the heat of the refrigerant flowing out of the first heat exchanger 3. Through the regulation of the refrigerant regulating device 6, the refrigerant flowing out of the second heat exchanger 5 can flow into the cooling channel of the compressor 1 for evaporation and then flow back to the compressor 1. Based on this, during the defrosting process of the second heat exchanger 5, the first heat exchanger 3 does not need to switch to an evaporating state. The first heat exchanger 3 can maintain heat release to the space where it is located, thereby effectively reducing the temperature fluctuation in the regulated space during the defrosting process.

[0039] Furthermore, in this embodiment, a cylinder and a first bearing are disposed in the cavity, the first bearing is disposed between the cylinder and the exhaust port 101, and the cooling channel passes through an area where the first bearing is located and an area where the cylinder is located.

[0040] In this embodiment, a second bearing is also provided in the cavity, and the exhaust port 101, the first bearing, the cylinder, the second bearing and the return air port 102 are arranged from top to bottom, and the first bearing and the second bearing are both connected to the motor output shaft in the cylinder. The return air port 102 can enter the cylinder for compression and then be discharged from the exhaust port 101.

[0041] The compressor 1 includes a shell, the cavity is arranged in the shell, an exhaust port 101 and an air return port 102 are respectively opened at the top and bottom of the shell, and the areas of the shell corresponding to the first bearing, the cylinder, and the second bearing are the first area, the second area, and the third area, respectively, and the cooling channel can be arranged in the first area and the second area. Among them, the cooling inlet can be arranged in the first area, and the cooling outlet can be arranged in the second area to improve the heat exchange efficiency.

[0042] In this embodiment, the cooling channel is arranged in the above manner, which is conducive to further reducing the exhaust temperature and exhaust pressure of the compressor 1, thereby further improving the energy efficiency of the system.

[0043] Further, in one embodiment, referring to Figures 1 to 3 , the refrigerant regulating device 6 comprises:

[0044] A first control valve 61, wherein the first control valve 61 is disposed in the first pipeline 01 and / or the second pipeline 02;

[0045] A second control valve 62 , wherein the second control valve 62 is connected in series with the cooling channel.

[0046] In this embodiment, the control valve is a valve body such as a stop valve, a solenoid valve, or a ball valve, which is used to control the on-off of the pipeline.

[0047] In this embodiment, the first control valve 61 is disposed in the first pipeline 01 . When the first control valve 61 is opened, the second heat exchanger 5 is connected to the valve port of the reversing component 2. When the reversing component 2 operates in the first operating position, the return air port 102 of the compressor 1 can be connected to the second heat exchanger 5, and the refrigerant flowing out of the second heat exchanger 5 can flow directly into the return air port 102 of the compressor 1 through the reversing component 2 and the second pipeline 02 in sequence. When the reversing component 2 operates in the second operating position, the exhaust port 101 of the compressor 1 can be connected to the second heat exchanger 5, and the refrigerant discharged from the compressor 1 can flow into the second heat exchanger 5 through the second pipeline 02, the reversing component 2, and the first pipeline 01 in sequence; when the first control valve 61 is closed, the second heat exchanger 5 is blocked from the valve port of the reversing component 2. When the reversing component 2 operates in the first operating position, the refrigerant flowing out of the second heat exchanger 5 cannot flow into the return air port 102 of the compressor 1 through the reversing component 2 and the second pipeline 02. When the reversing component 2 operates in the second operating position, the refrigerant flowing out of the compressor 1 cannot flow into the second heat exchanger 5 through the reversing component 2 and the first pipeline 01.

[0048] In this embodiment, the second control valve 62 may include a valve body such as a solenoid valve, a throttle valve, or a stop valve to control the on-off of the pipeline. When the second control valve 62 is opened, the refrigerant in the first pipeline 01 can flow into the cooling channel; when the second control valve 62 is closed, the refrigerant in the first pipeline 01 is prohibited from flowing into the cooling channel.

[0049] Among them, when the refrigerant regulating device 6 is in the first state, the first control valve 61 is in the open state and the second control valve 62 is in the closed state; when the refrigerant regulating device 6 is in the second state, the first control valve 61 is in the closed state and the second control valve 62 is in the open state.

[0050] In this embodiment, by cooperating with the first control valve 61 and the second control valve 62, the flow direction of the refrigerant outflowing from the second heat exchanger 5 can be effectively switched, thereby effectively reducing the temperature fluctuation of the regulating space of the first heat exchanger 3 during the defrosting process.

[0051] In other embodiments, the first control valve 61 may also be disposed in the second pipeline 02 .

[0052] Further, in one embodiment, referring to Figures 1 to 3 The second control valve 62 includes a first throttle valve, which is arranged at the inlet side of the cooling channel.

[0053] Based on this, in addition to controlling the on and off of the cooling channel, the second control valve 62 can also throttle and reduce the pressure of the refrigerant flowing into the cooling channel, which is beneficial to improving the evaporation effect of the refrigerant in the cooling channel in the above-mentioned second mode, and can enable the refrigerant to absorb more heat from the compressor 1, which is beneficial to increasing the temperature of the first heat exchanger 3 and the second heat exchanger 5, thereby further improving the defrosting efficiency while reducing the temperature fluctuation of the space where the first heat exchanger 3 is located, and reducing the risk of liquid hammer of the compressor 1, thereby improving the energy efficiency and reliability of system operation.

[0054] Furthermore, in one embodiment, the second control valve 62 includes an on-off valve, and the refrigerant regulating device 6 also includes a throttling component provided at the inlet side of the cooling channel.

[0055] The throttling component may include a component with an adjustable throttling opening or a component with an unadjustable throttling opening. The throttling component includes at least one of a throttling valve, a capillary tube, and the like.

[0056] In this embodiment, through the cooperation of the on-off valve and the throttling component, the refrigerant can be throttled and depressurized before flowing into the cooling channel, which is beneficial to improving the evaporation effect of the refrigerant in the cooling channel in the above-mentioned second mode, and can enable the refrigerant to absorb more heat from the compressor 1, which is beneficial to increasing the temperature of the first heat exchanger 3 and the second heat exchanger 5, thereby further improving the defrosting efficiency while reducing the temperature fluctuation of the space where the first heat exchanger 3 is located, and reducing the risk of liquid hammer of the compressor 1, thereby improving the energy efficiency and reliability of the system operation.

[0057] Furthermore, in one embodiment, the refrigerant regulating device 6 includes a three-way valve provided on the first pipeline 01, and the reversing assembly 2, the second heat exchanger 5 and the inlet of the cooling channel are respectively connected to different valve ports of the three-way valve.

[0058] The three-way valve has a first valve position and a second valve position. When the three-way valve is operated in the first valve position, the second heat exchanger 5 is connected to the inlet of the cooling channel, and the second heat exchanger 5 is blocked from the reversing component 2; when the three-way valve is operated in the second valve position, the second heat exchanger 5 is blocked from the inlet of the cooling channel, and the second heat exchanger 5 is connected to the reversing component 2.

[0059] When the refrigerant regulating device 6 operates in the first state, the three-way valve is in the second valve position; when the refrigerant regulating device 6 operates in the second state, the three-way valve is in the first valve position.

[0060] In this embodiment, the flow direction of the refrigerant outflowing from the second heat exchanger 5 is switched by a three-way valve, which is beneficial to improving control efficiency and accuracy.

[0061] Furthermore, in one embodiment, based on the setting of the above-mentioned three-way valve, the heat pump system also includes a second throttle valve arranged between the three-way valve and the second heat exchanger 5 or a throttling component arranged between the three-way valve and the cooling channel.

[0062] When the three-way valve operates in the first valve position, the second throttle valve can operate with a throttling opening; when the three-way valve operates in the second valve position, the second throttle valve can operate with a non-throttling opening.

[0063] The throttling component may include a throttle valve or a capillary tube, etc.

[0064] In this embodiment, by setting a throttling component or a second throttle valve, throttling of the refrigerant flowing into the cooling channel is achieved, thereby improving the evaporation efficiency of the refrigerant in the cooling channel, and effectively improving the defrosting efficiency, system operation reliability and energy efficiency.

[0065] Further, in one embodiment, referring to Figures 1 to 3 The inlet of the cooling channel is connected to the first pipeline 01, and the outlet of the cooling channel is connected to the second pipeline 02.

[0066] Based on this, the refrigerant flowing out of the second heat exchanger 5 can flow into the cooling channel in time to evaporate, reducing unnecessary refrigerant flow to the reversing component 2 or into the pipeline between the reversing component 2 and the return air port 102, effectively improving the defrosting efficiency and system energy efficiency.

[0067] In other embodiments, the inlet of the cooling channel and the outlet of the cooling channel are both connected to the first pipeline 01 , or the inlet of the cooling channel and the outlet of the cooling channel are both connected to the second pipeline 02 .

[0068] Furthermore, in one embodiment, the heat pump system further includes a first temperature sensor disposed at the inlet of the cooling channel and a second temperature sensor disposed in the environment where the second heat exchanger 5 is located.

[0069] When the cooling channel is turned on, the first temperature sensor can detect a first temperature of the refrigerant flowing out of the second heat exchanger 5. The second temperature sensor can detect a second temperature of the environment where the second heat exchanger 5 is located.

[0070] During the operation of the heat pump system in the first mode, whether the second heat exchanger 5 is frosted can be determined based on the first temperature and the second temperature. For example, when the temperature difference between the second temperature and the first temperature is less than a preset value, it can be determined that the second heat exchanger 5 is frosted; otherwise, it can be determined that the second heat exchanger 5 is not frosted.

[0071] In this embodiment, the provision of the first temperature sensor and the second temperature sensor facilitates accurate determination of the frosting state of the second heat exchanger 5, so that the heat pump system can adapt to the determination result and perform mode switching in time to ensure normal operation of the system.

[0072] In order to better understand the system function of the heat pump system in the utility model, a specific application example is proposed below:

[0073] The air conditioner operates in the first mode, the throttling device 4 operates at a throttling opening, the second control valve 62 is closed or operates at a minimum opening, the first control valve 61 is opened, and the first heat exchanger 3 releases heat to the space where it is located.

[0074] When it is detected in the first mode that the difference between the second temperature and the first temperature is less than the preset value or a defrost signal is received, it can be considered that the second heat exchanger 5 is frosted. At this time, the air conditioner can be controlled to operate in the second mode, the second control valve 62 operates with a throttling opening, the throttling device 4 is fully open, and the first control valve 61 is closed.

[0075] When the air conditioner is running in the second mode, the second heat exchanger 5 uses the temperature of the refrigerant condensed by the first heat exchanger 3 to defrost, and the defrosted refrigerant enters the compressor 1 to evaporate, and the evaporated refrigerant flows back to the compressor 1 for re-compression cycle.

[0076] During the operation of the air conditioner in the second mode, when at least one of the defrost end conditions is met, the air conditioner switches to the first mode, and the defrost conditions include:

[0077] The second temperature is greater than or equal to the first temperature;

[0078] The heat pump system or the equipment where the heat pump system is located fails;

[0079] The user turns off the device or exits the first mode.

[0080] When the heat pump system switches from the heating mode to the preset defrost mode (the second mode), the reversing component 2 maintains the current state, the first control valve 61 is closed, the throttling device 4 is fully opened, and the first throttle valve 62 is throttled. At this time, the refrigerant discharged from the compressor passes through the first heat exchanger 3, the throttling device 4, the second heat exchanger 5, the first throttle valve 62, the cooling channel and returns to the compressor in sequence. At this time, the first heat exchanger 3 and the second heat exchanger 5 both condense and release heat.

[0081] In addition, the embodiment of the utility model also provides an air conditioner. The air conditioner includes a heat pump system. The specific structure of the heat pump system refers to the above embodiment. Since the air conditioner adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0082] The air conditioner may include any type of air conditioner such as a wall-mounted air conditioner, a cabinet air conditioner, a ceiling air conditioner, a window air conditioner, a mobile air conditioner, a multi-split air conditioner, etc.

[0083] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0084] The serial numbers of the above-mentioned embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0085] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heat pump system, characterized in that: The heat pump system comprises a reversing assembly, a compressor, a first heat exchanger, a throttling device, a second heat exchanger and a refrigerant regulating device, an isolated cavity and a cooling channel are arranged in the compressor, the cavity has an exhaust port and an air return port, the first heat exchanger, the throttling device and the second heat exchanger are connected in sequence, and the exhaust port, the air return port, the first heat exchanger and the second heat exchanger are all connected to the reversing assembly; The first pipeline between the reversing assembly and the second heat exchanger and / or the second pipeline between the reversing assembly and the return air port, and the cooling channel are all connected to the refrigerant regulating device, and the refrigerant regulating device is used to switch the flow direction of the refrigerant flowing out of the second heat exchanger between a first flow direction and a second flow direction when the exhaust port is connected to the first heat exchanger, the first flow direction includes flowing through the first pipeline and the second pipeline in sequence and then entering the return air port, and the second flow direction includes flowing through the first pipeline and the cooling channel and then entering the return air port.

2. The heat pump system according to claim 1, characterized in that: The refrigerant regulating device comprises: a first control valve, the first control valve being arranged in the first pipeline and / or the second pipeline; A second control valve is connected in series with the cooling channel.

3. The heat pump system according to claim 2, characterized in that: The second control valve includes a first throttle valve disposed at an inlet side of the cooling channel.

4. The heat pump system according to claim 2, characterized in that: The second control valve includes an on-off valve, and the refrigerant regulating device also includes a throttling component arranged at the inlet side of the cooling channel.

5. The heat pump system according to claim 1, characterized in that: The refrigerant regulating device includes a three-way valve arranged on the first pipeline, and the reversing component, the second heat exchanger and the inlet of the cooling channel are respectively connected to different valve ports of the three-way valve.

6. The heat pump system according to claim 5, characterized in that: The heat pump system further includes a second throttle valve disposed between the three-way valve and the second heat exchanger or a throttle component disposed between the three-way valve and the cooling channel.

7. The heat pump system according to claim 1, characterized in that: The inlet of the cooling channel is connected to the first pipeline, and the outlet of the cooling channel is connected to the second pipeline.

8. The heat pump system according to any one of claims 1 to 7, characterized in that: A cylinder and a first bearing are arranged in the cavity, the first bearing is arranged between the cylinder and the exhaust port, and the cooling channel passes through an area where the first bearing is located and an area where the cylinder is located.

9. The heat pump system according to claim 3, characterized in that: The first heat exchanger is an indoor heat exchanger, and the second heat exchanger is an outdoor heat exchanger; when the heat pump system switches from a heating mode to a preset defrosting mode, the reversing component maintains a current state, the first control valve is closed, the throttling device is fully opened, and the first throttle valve performs throttling.

10. An air conditioner, characterized in that: The air conditioner comprises the heat pump system according to any one of claims 1 to 9.

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