Air conditioner heat pump system and air conditioner

Abstract

The invention relates to the technical field of compression refrigeration, in particular to an air conditioner heat pump system and an air conditioner. The air conditioner heat pump system comprises a heat regenerator and a throttling component. The heat regenerator is provided with a first heat regeneration pipe and a second heat regeneration pipe; the throttling component is arranged on a refrigerant channel between the condenser and the evaporator and communicates with the first heat return pipe and the second heat return pipe. And under the refrigerating working condition and the heating working condition, the refrigerant before throttling enters the first heat return pipe, and the refrigerant after throttling enters the second heat return pipe, so that the refrigerant in the first heat return pipe exchanges heat with the refrigerant in the second heat return pipe. According to the heat exchanger, through the throttling component, a refrigerant before throttling can enter the first heat return pipe, the refrigerant after throttling can enter the second heat return pipe, and the refrigerant in the first heat return pipe exchanges heat with the refrigerant in the second heat return pipe, so that the refrigerant in the first heat return pipe is reduced, and the supercooling degree of the refrigerant is improved; the problem that in the prior art, an air conditioner heat pump system cannot improve the supercooling degree of a refrigerant under the heating working condition is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of compression refrigeration, and in particular to an air conditioning heat pump system and an air conditioner. Background Art

[0002] With the increasing number of application scenarios of air conditioning heat pump systems, air conditioning heat pump systems cannot improve system capacity and energy efficiency by continuously increasing the size of condensers and evaporators due to factors such as space and cost. When a regenerator is used for subcooling design, under refrigeration conditions, the refrigerant at the condenser outlet exchanges heat with the refrigerant after throttling, which can increase the refrigerant subcooling. However, after switching to heat exchange conditions, the evaporator and condenser are interchanged, and the refrigerant in the regenerator is throttled. There is no obvious heat exchange effect between the refrigerant at the outlet of the four-way valve S pipe after throttling, and it cannot play a role in improving capacity and energy efficiency.

[0003] Therefore, how to improve the supercooling degree of the refrigerant in the air-conditioning heat pump system under heating conditions is an issue that the industry urgently needs to solve. Summary of the invention

[0004] The present invention provides an air conditioning heat pump system and an air conditioner, which are used to solve the problem that the air conditioning heat pump system in the prior art cannot improve the supercooling degree of the refrigerant under the heating condition.

[0005] The present invention provides an air conditioning heat pump system, comprising: A regenerator having a first regenerator pipe and a second regenerator pipe; The throttling component is arranged on the refrigerant passage between the condenser and the evaporator, and is connected to the first heat return pipe and the second heat return pipe; under cooling conditions and heating conditions, the refrigerant before throttling enters the first heat return pipe, and the refrigerant after throttling enters the second heat return pipe, so that the refrigerant in the first heat return pipe exchanges heat with the refrigerant in the second heat return pipe.

[0006] According to the air conditioning heat pump system provided by the present invention, the throttling component comprises: an external machine throttling assembly, one end of which is in communication with the first interface of the condenser, and the other end of which is in communication with one end of the first heat return pipe; the external machine throttling assembly is used to throttle the refrigerant under the heating condition; An indoor unit throttling component, one end of the indoor unit throttling component is connected to the other end of the first heat regeneration pipe, and the other end of the indoor unit throttling component is connected to the first interface of the evaporator; the indoor unit throttling component is used to throttle the refrigerant under the refrigeration condition.

[0007] According to the air conditioning heat pump system provided by the present invention, the throttling component further includes: a heat recovery liquid inlet pipe and a heat recovery liquid outlet pipe, wherein the heat recovery liquid inlet pipe is connected to the heat recovery liquid outlet pipe through the first heat recovery pipe; A first throttling component, disposed on the heat recovery liquid outlet pipe, for throttling the refrigerant under the refrigeration condition and the heating condition; The refrigerant flow direction reversing component has cooling flow direction and heating flow direction; Under the refrigeration condition, the refrigerant flow direction reversing component is in the refrigeration flow direction, so that the first interface of the condenser is connected to the inlet of the heat recovery liquid inlet pipe, and the first interface of the evaporator is connected to the outlet of the heat recovery liquid outlet pipe; Under the heating condition, the refrigerant flow direction reversing component is in the heating flow direction, so that the first interface of the evaporator is connected to the inlet of the heat recovery liquid inlet pipe, and the first interface of the condenser is connected to the outlet of the heat recovery liquid outlet pipe.

[0008] According to the air conditioning heat pump system provided by the present invention, the refrigerant flow direction reversing component comprises: A refrigeration valve group, used to open under the refrigeration condition; the refrigeration valve group includes a first one-way valve and a third one-way valve; the inlet of the first one-way valve is communicated with the first interface of the condenser, and the outlet of the first one-way valve is communicated with the inlet of the heat recovery liquid inlet pipe; the inlet of the third one-way valve is communicated with the outlet of the heat recovery liquid outlet pipe, and the outlet of the third one-way valve is communicated with the first interface of the evaporator; A heating valve group is used to open under the heating condition; the heating valve group includes a second one-way valve and a fourth one-way valve; the inlet of the fourth one-way valve is connected to the first interface of the evaporator, and the outlet of the fourth one-way valve is connected to the inlet of the heat recovery liquid inlet pipe; the inlet of the second one-way valve is connected to the outlet of the heat recovery liquid outlet pipe, and the outlet of the second one-way valve is connected to the first interface of the condenser.

[0009] According to the air conditioning heat pump system provided by the present invention, the refrigerant flow direction reversing component comprises: The first four-way reversing valve, the D port of the first four-way reversing valve is connected to the first interface of the condenser, the C port of the first four-way reversing valve is connected to the inlet of the heat recovery liquid inlet pipe; the E port of the first four-way reversing valve is connected to the heat recovery liquid outlet pipe; the S port of the first four-way reversing valve is connected to the first interface of the evaporator.

[0010] According to the air conditioning heat pump system provided by the present invention, the second inlet of the second heat regeneration pipe is connected to the S port of the second four-way reversing valve, and the second outlet of the second heat regeneration pipe is connected to the air inlet of the compressor.

[0011] The air conditioning heat pump system provided according to the present invention also includes: A gas-liquid separator, wherein the second outlet of the second heat regeneration pipe is connected to the air inlet of the compressor through the gas-liquid separator.

[0012] According to the air conditioning heat pump system provided by the present invention, the regenerator includes a shell and tube regenerator or a plate heat exchanger.

[0013] The air conditioning heat pump system provided according to the present invention also includes: The controller is electrically connected to the throttling component; under cooling and heating conditions, the controller controls the throttling component so that the refrigerant before throttling enters the first heat return pipe, and the refrigerant after throttling enters the second heat return pipe.

[0014] The present invention also provides an air conditioner, comprising any one of the air conditioning heat pump systems described above.

[0015] The air conditioning heat pump system provided by the present invention arranges a throttling component on the refrigerant passage between the condenser and the evaporator. The throttling component can allow the refrigerant before throttling to enter the first heat return pipe and the refrigerant after throttling to enter the second heat return pipe under both cooling and heating conditions, thereby allowing the refrigerant in the first heat return pipe to exchange heat with the refrigerant in the second heat return pipe, so as to reduce the refrigerant in the first heat return pipe, increase the supercooling of the refrigerant, improve the capacity and energy efficiency of the air conditioning heat pump system, and solve the problem in the prior art that the air conditioning heat pump system cannot increase the supercooling of the refrigerant under heating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is one of the structural schematic diagrams of the air conditioning heat pump system provided by the present invention. In the figure, the dotted arrows represent the flow direction of the refrigerant under the heating condition; the solid arrows represent the flow direction of the refrigerant under the cooling condition.

[0018] Figure 2 This is the second structural schematic diagram of the air conditioning heat pump system provided by the present invention. The dotted arrows in the figure represent the flow direction of the refrigerant under heating conditions; the solid arrows represent the flow direction of the refrigerant under cooling conditions.

[0019] Figure 3 This is the third structural schematic diagram of the air conditioning heat pump system provided by the present invention. The dotted arrows in the figure represent the flow direction of the refrigerant under heating conditions; the solid arrows represent the flow direction of the refrigerant under cooling conditions.

[0020] Reference numerals: 100. Regenerator; 200, throttling component; 210, external machine throttling assembly; 220, internal machine throttling assembly; 230, heat recovery liquid inlet pipe; 240, heat recovery liquid outlet pipe; 250, first throttling assembly; 260, refrigerant flow direction reversing assembly; 261, first one-way valve; 262, second one-way valve; 263, third one-way valve; 264, fourth one-way valve; 300, condenser; 400, evaporator; 500, compressor; 600, second four-way reversing valve; 700, gas-liquid separator. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations 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 one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0026] The current air conditioning heat pump system includes a compressor, a four-way reversing valve, an evaporator and an expansion valve. Under refrigeration conditions, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor flows into the condenser and is condensed and liquefied in the condenser. The medium-temperature and high-pressure liquid refrigerant discharged from the condenser is expanded by the expansion valve and converted into a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant enters the evaporator and exchanges heat with the hot air outside the evaporator. The refrigerant heats up to form a low-temperature and low-pressure gaseous refrigerant and is discharged from the evaporator and returned to the compressor. Under heating conditions, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor enters the evaporator and is heat-exchanged and liquefied to form a medium-temperature and high-pressure liquid refrigerant. The medium-temperature and high-pressure liquid refrigerant discharged from the evaporator is expanded by the expansion valve to form a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant enters the condenser and exchanges heat with the external air to heat up to form a low-temperature and low-pressure gaseous refrigerant, and finally returns to the compressor.

[0027] like Figures 1 to 3 As shown, a specific embodiment of the first aspect of the present invention provides an air conditioning heat pump system. The air conditioning heat pump system includes a regenerator 100 and a throttling component 200.

[0028] Among them, the regenerator 100 has a first heat regeneration pipe and a second heat regeneration pipe; the throttling component 200 is arranged on the refrigerant passage between the condenser 300 and the evaporator 400, and is connected with the first heat regeneration pipe and the second heat regeneration pipe; under cooling conditions and heating conditions, the refrigerant before throttling enters the first heat regeneration pipe, and the refrigerant after throttling enters the second heat regeneration pipe, so that the refrigerant in the first heat regeneration pipe and the refrigerant in the second heat regeneration pipe are exchanged with each other.

[0029] In this embodiment, a throttling component 200 is provided on the refrigerant passage between the condenser 300 and the evaporator 400. The throttling component 200 can allow the refrigerant before throttling to enter the first heat return pipe and the refrigerant after throttling to enter the second heat return pipe under both cooling and heating conditions, thereby allowing the refrigerant in the first heat return pipe to exchange heat with the refrigerant in the second heat return pipe, so as to reduce the refrigerant in the first heat return pipe, increase the supercooling of the refrigerant, improve the capacity and energy efficiency of the air-conditioning heat pump system, and solve the problem in the prior art that the air-conditioning heat pump system cannot increase the supercooling of the refrigerant under heating conditions.

[0030] At present, the scheme of using a subcooler in the air conditioning heat pump system to improve the refrigerant supercooling is: the liquid refrigerant at the outlet of the condenser will be divided into a main route and an auxiliary route, the main route refrigerant directly enters the subcooler, and the auxiliary route refrigerant enters the subcooler after being throttled and reduced to a certain intermediate pressure by a throttling device. This device can improve the supercooling of the refrigerant before entering the evaporator, but the intermediate pressure of the auxiliary route refrigerant is difficult to determine. In order to increase the intermediate pressure of the auxiliary route refrigerant, additional devices such as thermostats and throttle valves are required, making the structure of the system more complicated and the cost higher. Obviously, the air conditioning heat pump system of this embodiment can not only achieve the purpose of improving the refrigerant supercooling in both cooling and heating conditions, but also the structure of the air conditioning heat pump system of this embodiment is simpler.

[0031] like Figures 1 to 3 As shown, in some embodiments, the air conditioning heat pump system further includes a compressor 500 and a second four-way reversing valve 600; the second inlet of the second heat regeneration pipe is connected to the S port of the second four-way reversing valve 600, and the second outlet of the second heat regeneration pipe is connected to the air inlet of the compressor 500. In this embodiment, by setting the compressor 500, power can be provided for the air conditioning heat pump system to promote the transfer of heat from the low temperature area to the high temperature area. By setting the second four-way reversing valve 600, the refrigeration and heating switching of the heat pump system can be realized. The second inlet of the second heat regeneration pipe is connected to the S port of the second four-way reversing valve 600, which can ensure that the refrigerant discharged from the condenser 300 or the evaporator 400 enters the second heat regeneration pipe from the second inlet of the second heat regeneration pipe. After the low temperature and low pressure refrigerant of the second heat regeneration pipe exchanges heat with the medium temperature and high pressure refrigerant in the first heat regeneration pipe, the refrigerant of the second heat regeneration pipe returns to the compressor 500, realizing the recycling of the refrigerant, reducing the energy consumption of the downstream components of the refrigerant, and thus improving the overall efficiency of the system.

[0032] Preferably, the air conditioning heat pump system further includes a gas-liquid separator 700; the second outlet of the second heat recovery pipe is connected to the air inlet of the compressor 500 through the gas-liquid separator 700. By providing the gas-liquid separator 700, it is possible to ensure that the refrigerant circulates more smoothly in the system and reduce unnecessary energy loss. It is also possible to reduce the failure rate of the system and improve the reliability and stability of the system.

[0033] Specifically, the D port of the second four-way reversing valve 600 is communicated with the air outlet of the compressor 500, the E port of the second four-way reversing valve 600 is communicated with the second interface of the evaporator 400, and the C port of the second four-way valve is communicated with the second interface of the condenser 300. Under the heating condition, the high-temperature and high-pressure refrigerant discharged from the compressor 500 enters from the D port of the second four-way reversing valve 600, flows out from the E port, and then flows into the evaporator 400. Under the cooling condition, the high-temperature and high-pressure refrigerant discharged from the compressor 500 enters from the D port of the second four-way reversing valve 600, flows out from the C port, and then flows into the condenser 300.

[0034] Further, the regenerator 100 includes a shell and tube regenerator or a plate heat exchanger.

[0035] Preferably, the regenerator 100 is a shell and tube regenerator, which can be directly connected to the S port of the second four-way reversing valve 600, and is easy to assemble.

[0036] In some embodiments, the air conditioning heat pump system further comprises a controller, which is electrically connected to the throttling component 200. In cooling and heating conditions, the controller controls the throttling component 200 so that the refrigerant before throttling enters the first heat regeneration pipe, and the refrigerant after throttling enters the second heat regeneration pipe.

[0037] In this embodiment, automatic control can be achieved by providing a controller electrically connected to the throttling component 200.

[0038] Furthermore, the controller is also electrically connected to the second four-way reversing valve 600. In cooling conditions, the controller controls the D port of the second four-way reversing valve 600 to be connected to the C port. In heating conditions, the controller controls the D port of the second four-way reversing valve 600 to be connected to the E port.

[0039] like Figure 1 As shown, in some embodiments, the throttling component 200 includes an external machine throttling component 210 and an internal machine throttling component 220. One end of the external machine throttling component 210 is connected to the first interface of the condenser 300, and the other end is connected to one end of the first heat return pipe; the external machine throttling component 210 is used to throttle the refrigerant under the heating condition. One end of the internal machine throttling component 220 is connected to the other end of the first heat return pipe, and the other end of the internal machine throttling component 220 is connected to the first interface of the evaporator 400; the internal machine throttling component 220 is used to throttle the refrigerant under the cooling condition.

[0040] In this embodiment, an external unit throttling assembly 210 is provided between one end of the first heat return pipe and the first interface of the condenser 300, and an internal unit throttling assembly 220 is provided between the other end of the first heat return pipe and the first interface of the evaporator 400. Under cooling conditions and heating conditions, by adjusting the working conditions of the internal unit throttling assembly 220 and the external unit throttling assembly 210, the refrigerant before throttling enters the first heat return pipe and the refrigerant after throttling enters the second heat return pipe under cooling conditions and heating conditions, thereby improving the supercooling of the refrigerant and improving the capacity and energy consumption of the system.

[0041] Specifically, the controller is electrically connected to the external unit throttling component 210 and the internal unit throttling component 220, and is used to control the external unit throttling component 210 to throttle the refrigerant under heating conditions, and to control the internal unit throttling component 220 to throttle the refrigerant under cooling conditions.

[0042] Under the refrigeration condition, the controller controls the external machine throttling component 210 not to throttle the refrigerant, and controls the internal machine throttling component 220 to throttle the refrigerant. The high-temperature and high-pressure refrigerant compressed by the compressor 500 flows into the condenser 300 from the C port of the second four-way reversing valve 600. The medium-temperature and high-pressure liquid refrigerant discharged from the condenser 300 directly enters the first heat return pipe through the external throttling component, and exchanges heat with the low-temperature and low-pressure refrigerant in the second heat return pipe in the first heat return pipe. The medium-temperature and high-pressure liquid refrigerant in the first heat return pipe is further cooled, thereby increasing the supercooling degree of the refrigerant. The refrigerant discharged from the first heat return pipe is throttled by the internal machine throttling component 220, and then enters the evaporator 400. The low-temperature, low-pressure gaseous refrigerant discharged from the evaporator 400 enters the second four-way reversing valve 600 from the E port of the second four-way reversing valve 600, and then flows out of the second four-way reversing valve 600 from the S port, and then enters the second reheat pipe of the regenerator 100. The low-temperature, low-pressure gaseous refrigerant in the second reheat pipe exchanges heat with the medium-temperature, high-pressure liquid refrigerant in the first reheat pipe to increase the temperature. The low-temperature, low-pressure gaseous refrigerant flowing out of the second reheat pipe enters the gas-liquid separator 700 for gas-liquid separation, and finally returns to the compressor 500.

[0043] Under the heating condition, the controller controls the external machine throttling assembly 210 to throttle the refrigerant, and controls the internal machine throttling assembly 220 not to throttle the refrigerant. The high-temperature and high-pressure refrigerant compressed by the compressor 500 flows into the evaporator 400 from the E port of the second four-way reversing valve 600, and the medium-temperature and high-pressure liquid refrigerant discharged from the evaporator 400 directly enters the first heat return pipe through the internal machine throttling assembly 220, and exchanges heat with the low-temperature and low-pressure refrigerant in the second heat return pipe in the first heat return pipe. The medium-temperature and high-pressure liquid refrigerant in the first heat return pipe is further cooled, thereby increasing the supercooling degree of the refrigerant. The refrigerant discharged from the first heat recovery pipe enters the condenser 300 after being throttled by the external unit throttling assembly 210; the low-temperature, low-pressure gaseous refrigerant discharged from the condenser 300 enters the second four-way reversing valve 600 from the C port of the second four-way reversing valve 600, flows out of the second four-way reversing valve 600 from the S port, and then enters the second heat recovery pipe of the regenerator 100, and heat-exchanges with the medium-temperature, high-pressure liquid refrigerant in the first heat recovery pipe to increase the temperature. The low-temperature, low-pressure gaseous refrigerant flowing out of the second heat recovery pipe enters the gas-liquid separator 700 for gas-liquid separation, and finally returns to the compressor 500.

[0044] Furthermore, the external machine throttling component 210 is a throttle valve, and the internal machine throttling component 220 is a throttle valve.

[0045] like Figure 2 and Figure 3 As shown, in some embodiments, the throttling component 200 also includes a heat recovery liquid inlet pipe 230, a heat recovery liquid outlet pipe 240, a first throttling assembly 250 and a refrigerant flow direction reversing assembly 260. The heat recovery liquid inlet pipe 230 is connected to the heat recovery liquid outlet pipe 240 through the first heat recovery pipe. The first throttling assembly 250 is arranged on the heat recovery liquid outlet pipe 240, and is used to throttle the refrigerant under refrigeration conditions and heating conditions. The refrigerant flow direction reversing assembly 260 has a refrigeration flow direction and a heating flow direction. Under the refrigeration condition, the refrigerant flow direction reversing assembly 260 is in the refrigeration flow direction, so that the first interface of the condenser 300 is connected to the inlet of the heat recovery liquid inlet pipe 230, and the first interface of the evaporator 400 is connected to the outlet of the heat recovery liquid outlet pipe 240. Under heating conditions, the refrigerant flow direction reversing assembly 260 is in the heating direction, so that the first interface of the evaporator 400 is connected to the inlet of the heat recovery liquid inlet pipe 230, and the first interface of the condenser 300 is connected to the outlet of the heat recovery liquid outlet pipe 240.

[0046] In this embodiment, by providing a heat recovery liquid inlet pipe 230, a heat recovery liquid outlet pipe 240 and a refrigerant flow direction reversing component 260, and combining a first throttling component 250, it can be ensured that the refrigerant can exchange heat in the reheater 100 under both cooling conditions and heating conditions, thereby improving the subcooling of the refrigerant and reducing the number of throttling components used.

[0047] Preferably, the controller is electrically connected to the refrigerant flow direction reversing component 260; in cooling conditions, the controller controls the refrigerant flow direction reversing component 260 to be in the cooling flow direction. In heating conditions, the controller controls the refrigerant flow direction reversing component 260 to be in the heating flow direction.

[0048] like Figure 2 As shown, further, the refrigerant flow direction reversing assembly 260 includes a refrigeration valve group and a heating valve group. The refrigeration valve group is used to open under refrigeration conditions; the refrigeration valve group includes a first one-way valve 261 and a third one-way valve 263; the inlet of the first one-way valve 261 is connected to the first interface of the condenser 300, and the outlet of the first one-way valve 261 is connected to the inlet of the heat recovery liquid inlet pipe 230; the inlet of the third one-way valve 263 is connected to the outlet of the heat recovery liquid outlet pipe 240, and the outlet of the third one-way valve 263 is connected to the first interface of the evaporator 400. The heating valve group is used to open under heating conditions; the heating valve group includes a second one-way valve 262 and a fourth one-way valve 264; the inlet of the fourth one-way valve 264 is connected to the first interface of the evaporator 400, and the outlet of the fourth one-way valve 264 is connected to the inlet of the heat recovery liquid inlet pipe 230; the inlet of the second one-way valve 262 is connected to the outlet of the heat recovery liquid outlet pipe 240, and the outlet of the second one-way valve 262 is connected to the first interface of the condenser 300.

[0049] In this embodiment, by setting the refrigeration valve group and the heating valve group, the working state of the refrigeration valve group and the heating valve group can be adjusted so that the refrigerant is throttled by the first throttling assembly 250 after passing through the first heat return pipe, ensuring that the refrigerant in the first heat return pipe can be cooled under both the refrigeration and heating conditions, thereby improving the supercooling degree of the refrigerant and the capacity and energy efficiency of the system. In addition, the use of four one-way valves to achieve reversal can reduce the cost of the system.

[0050] Specifically, the controller is electrically connected to the first one-way valve 261, the second one-way valve 262, the third one-way valve 263 and the fourth one-way valve 264. In the cooling condition, the controller controls the first one-way valve 261 and the third one-way valve 263 to be turned on, while the second one-way valve 262 and the fourth one-way valve 264 are turned off. In the heating condition, the controller controls the second one-way valve 262 and the fourth one-way valve 264 to be turned on, while the first one-way valve 261 and the third one-way valve 263 are turned off.

[0051] Under the refrigeration condition, the controller controls the second one-way valve 262 and the fourth one-way valve 264 of the heating valve group to be closed, and controls the first one-way valve 261 and the third one-way valve 263 of the refrigeration valve group to be opened. The refrigerant discharged from the condenser 300 enters the first heat recovery pipe through the first one-way valve 261 and the heat recovery liquid inlet pipe 230. The medium-temperature and high-pressure refrigerant in the first heat recovery pipe exchanges heat with the low-temperature and low-pressure refrigerant in the second heat recovery pipe and is cooled, thereby increasing the supercooling degree of the refrigerant. The refrigerant discharged from the first heat recovery pipe passes through the heat recovery liquid outlet pipe 240 and is throttled by the first throttling assembly 250; finally, it passes through the third one-way valve 263 and flows into the evaporator 400.

[0052] In the heating condition, the controller controls the second check valve 262 and the fourth check valve 264 of the heating valve group to be opened, and controls the first check valve 261 and the third check valve 263 of the cooling valve group to be closed. The refrigerant discharged from the evaporator 400 passes through the fourth check valve 264 and the heat recovery liquid inlet pipe 230 and enters the first heat recovery pipe. The medium-temperature and high-pressure refrigerant in the first heat recovery pipe exchanges heat with the low-temperature and low-pressure refrigerant in the second heat recovery pipe and is cooled, thereby increasing the supercooling degree of the refrigerant. The refrigerant discharged from the first heat recovery pipe passes through the heat recovery liquid outlet pipe 240 and is throttled by the first throttling assembly 250; finally, it passes through the second check valve 262 and flows into the condenser 300.

[0053] like Figure 3 As shown, further, the reversing assembly also includes a first four-way reversing valve; the D port of the first four-way reversing valve is connected to the first interface of the condenser 300, and the C port of the first four-way reversing valve is connected to the inlet of the heat recovery liquid inlet pipe 230; the E port of the first four-way reversing valve is connected to the heat recovery liquid outlet pipe 240; the S port of the first four-way reversing valve is connected to the first interface of the evaporator 400.

[0054] In this embodiment, the switching is achieved by the first four-way switching valve, which can simplify the piping of the system.

[0055] Specifically, the controller is electrically connected to the first four-way reversing valve.

[0056] Under refrigeration conditions, the refrigerant discharged from the condenser 300 enters the first four-way reversing valve from the D port of the first four-way reversing valve, and flows out from the C port of the first four-way reversing valve; then, the refrigerant enters the first heat regeneration pipe through the heat recovery liquid inlet pipe 230, and the medium-temperature and high-pressure refrigerant in the first heat regeneration pipe exchanges heat with the low-temperature and low-pressure refrigerant in the second heat regeneration pipe to reduce the temperature, thereby reducing the supercooling degree of the refrigerant. The refrigerant flowing out of the first heat regeneration pipe passes through the heat recovery liquid outlet pipe 240, and enters the E port of the first four-way reversing valve after being throttled by the first throttling assembly 250; then, it flows into the evaporator 400 from the S port of the first four-way reversing valve.

[0057] Under the heating condition, the refrigerant discharged from the evaporator 400 enters the first four-way reversing valve from the S port of the first four-way reversing valve, and flows out from the C port of the first four-way reversing valve; then, the refrigerant enters the first heat regeneration pipe through the heat recovery liquid inlet pipe 230, and the medium-temperature and high-pressure refrigerant in the first heat regeneration pipe exchanges heat with the low-temperature and low-pressure refrigerant in the second heat regeneration pipe to reduce the temperature, thereby reducing the supercooling degree of the refrigerant. The refrigerant flowing out of the first heat regeneration pipe passes through the heat recovery liquid outlet pipe 240, and enters the E port of the first four-way reversing valve after being throttled by the first throttling assembly 250; then, it flows into the condenser 300 from the D port of the first four-way reversing valve.

[0058] by Figure 1 The air conditioning heat pump system shown in the figure was used as an example for experimental testing. Based on the same system, the system capacity and energy efficiency were recorded after the system was running stably without a heat regenerator and with a heat regenerator installed. The obtained data are shown in Table 1.

[0059] Table 1

[0060] According to the experimental data in Table 1, after the installation of the regenerator, the capacity of the system is increased by 2.28%, and the energy efficiency is increased by 4.32%, which also proves that the air conditioning heat pump system of this embodiment can improve the capacity and energy efficiency.

[0061] A specific embodiment of the second aspect of the present invention provides an air conditioner, which includes the air conditioning heat pump system of any of the above embodiments.

[0062] Since the air conditioner of this embodiment includes the air conditioning heat pump system of any of the above embodiments, it has at least the above advantages, which will not be described in detail here.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air conditioning heat pump system, characterized in that: include: A regenerator (100) comprising a first regenerator pipe and a second regenerator pipe; The throttling component (200) is arranged on the refrigerant passage between the condenser (300) and the evaporator (400), and is connected to the first heat return pipe and the second heat return pipe; under cooling conditions and heating conditions, the refrigerant before throttling enters the first heat return pipe, and the refrigerant after throttling enters the second heat return pipe, so that the refrigerant in the first heat return pipe exchanges heat with the refrigerant in the second heat return pipe.

2. The air conditioning heat pump system according to claim 1, characterized in that: The throttling component (200) comprises: an external machine throttling component (210), one end of the external machine throttling component (210) being in communication with a first interface of the condenser (300), and the other end of the external machine throttling component (210) being in communication with one end of the first heat return pipe; the external machine throttling component (210) being used for throttling the refrigerant under the heating condition; An indoor unit throttling component (220), one end of the indoor unit throttling component (220) being connected to the other end of the first heat regeneration pipe, and the other end of the indoor unit throttling component (220) being connected to the first interface of the evaporator (400); the indoor unit throttling component (220) is used to throttle the refrigerant under the refrigeration condition.

3. The air conditioning heat pump system according to claim 1, characterized in that: The throttling component (200) further includes: a heat recovery liquid inlet pipe (230) and a heat recovery liquid outlet pipe (240), wherein the heat recovery liquid inlet pipe (230) is connected to the heat recovery liquid outlet pipe (240) via the first heat recovery pipe; A first throttling component (250), arranged on the heat recovery liquid outlet pipe (240), and used for throttling the refrigerant under the cooling condition and the heating condition; A refrigerant flow direction reversing component (260) having a cooling flow direction and a heating flow direction; In the refrigeration condition, the refrigerant flow direction reversing component (260) is in the refrigeration flow direction, so that the first interface of the condenser (300) is connected to the inlet of the heat recovery liquid inlet pipe (230), and the first interface of the evaporator (400) is connected to the outlet of the heat recovery liquid outlet pipe (240); In the heating condition, the refrigerant flow direction reversing component (260) is in the heating flow direction, so that the first interface of the evaporator (400) is connected to the inlet of the heat recovery liquid inlet pipe (230), and the first interface of the condenser (300) is connected to the outlet of the heat recovery liquid outlet pipe (240).

4. The air conditioning heat pump system according to claim 3, characterized in that: The refrigerant flow direction reversing component (260) comprises: a refrigeration valve group, used to be opened under the refrigeration condition; the refrigeration valve group comprises a first one-way valve (261) and a third one-way valve (263); the inlet of the first one-way valve (261) is communicated with the first interface of the condenser (300), and the outlet of the first one-way valve (261) is communicated with the inlet of the heat recovery liquid inlet pipe (230); the inlet of the third one-way valve (263) is communicated with the outlet of the heat recovery liquid outlet pipe (240), and the outlet of the third one-way valve (263) is communicated with the first interface of the evaporator (400); A heating valve group is used to open under the heating condition; the heating valve group comprises a second one-way valve (262) and a fourth one-way valve (264); the inlet of the fourth one-way valve (264) is communicated with the first interface of the evaporator (400), and the outlet of the fourth one-way valve (264) is communicated with the inlet of the heat recovery liquid inlet pipe (230); the inlet of the second one-way valve (262) is communicated with the outlet of the heat recovery liquid outlet pipe (240), and the outlet of the second one-way valve (262) is communicated with the first interface of the condenser (300).

5. The air conditioning heat pump system according to claim 3, characterized in that: The refrigerant flow direction reversing component (260) comprises: A first four-way reversing valve, wherein the D port of the first four-way reversing valve is in communication with the first interface of the condenser (300), the C port of the first four-way reversing valve is in communication with the inlet of the heat recovery liquid inlet pipe (230); the E port of the first four-way reversing valve is in communication with the heat recovery liquid outlet pipe (240); and the S port of the first four-way reversing valve is in communication with the first interface of the evaporator (400).

6. The air conditioning heat pump system according to claim 1, characterized in that: The second inlet of the second heat regeneration pipe is communicated with the S port of the second four-way reversing valve (600), and the second outlet of the second heat regeneration pipe is communicated with the air inlet of the compressor (500).

7. The air conditioning heat pump system according to claim 6, characterized in that: Also includes: A gas-liquid separator (700), wherein the second outlet of the second heat regeneration pipe is connected to the air inlet of the compressor (500) through the gas-liquid separator (700).

8. The air conditioning heat pump system according to any one of claims 1 to 7, characterized in that: The regenerator (100) comprises a shell and tube regenerator or a plate heat exchanger.

9. The air conditioning heat pump system according to any one of claims 1 to 7, characterized in that: Also includes: A controller is electrically connected to the throttling component (200); under cooling conditions and heating conditions, the controller controls the throttling component (200) so that the refrigerant before throttling enters the first heat return pipe, and the refrigerant after throttling enters the second heat return pipe.

10. An air conditioner, characterized in that: An air conditioning heat pump system comprising any one of claims 1 to 9.

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