Integral type heat pump air conditioning system

Abstract

The invention provides an integral type heat pump air conditioning system, particularly relates to the technical field of air conditioners, and is used for preventing a heat exchanger from frosting under the condition that only one throttling element is arranged. The integral type heat pump air conditioning system comprises an indoor unit and an outdoor unit, the outdoor unit comprises a compressor; a four-way reversing valve; a first heat exchanger assembly; a second heat exchanger assembly; the anti-frosting pipeline is arranged at the bottom of the second heat exchanger assembly; a valve assembly; under the first working condition, the valve assembly is used for enabling a first refrigerant to enter the anti-frosting pipeline after passing through the second end of the first heat exchanger assembly and then pass through the second end of the second heat exchanger assembly and the first end of the second heat exchanger assembly; and under the second working condition, the valve assembly is used for enabling the first refrigerant to directly flow to the second end of the first heat exchanger assembly after passing through the first end of the second heat exchanger assembly and the second end of the second heat exchanger assembly.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to an integrated heat pump air conditioning system. Background Art

[0002] At present, with the development of the heat pump industry, the design of air-conditioning systems tends to be integrated. The integrated heat pump air-conditioning system has attracted widespread attention due to its advantage of saving installation space.

[0003] However, in winter, the outdoor temperature is too low, and the moisture in the air easily condenses into frost or ice adheres to the heat exchanger in the outdoor unit of the integrated heat pump air conditioning system, affecting the heat exchange effect of the refrigerant and even damaging the hardware of the heat exchanger. In the related art, in order to save installation space, an electric heating method is added to the chassis of the heat exchanger to solve the problem of frost in winter, but the cost is high and the defrosting effect is poor.

[0004] Therefore, how to effectively and cost-effectively prevent the integrated heat pump air-conditioning system from frosting is an urgent problem to be solved. Summary of the invention

[0005] The embodiment of the present application provides an integrated heat pump air conditioning system, which is used to effectively and cost-effectively prevent frosting of the integrated heat pump air conditioning system.

[0006] In order to achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0007] The present application provides an integrated heat pump air conditioning system, comprising:

[0008] Indoor unit;

[0009] Outdoor unit, the outdoor unit includes:

[0010] compressor;

[0011] Four-way reversing valve;

[0012] A first heat exchanger assembly, used for exchanging heat with the indoor unit;

[0013] a second heat exchanger assembly; and

[0014] An anti-frost pipeline, the anti-frost pipeline is arranged at the bottom of the second heat exchanger assembly;

[0015] The first end of the compressor, the first end of the first heat exchanger assembly, the second end of the first heat exchanger assembly, the second end of the second heat exchanger assembly, the first end of the second heat exchanger assembly, the four-way reversing valve and the second end of the compressor are sequentially connected to form a closed flow path;

[0016] A valve assembly is connected to the second end of the first heat exchanger assembly, the anti-frost pipeline and the second end of the second heat exchanger assembly; wherein,

[0017] In the first working condition, the valve assembly is used to allow the first refrigerant to pass through the second end of the first heat exchanger assembly, enter the anti-frost pipeline, and then pass through the second end of the second heat exchanger assembly and the first end of the second heat exchanger assembly;

[0018] In the second working condition, the valve assembly is used to allow the first refrigerant to flow directly to the second end of the first heat exchanger assembly after passing through the first end of the second heat exchanger assembly and the second end of the second heat exchanger assembly.

[0019] Because the outdoor temperature is too low in winter, the moisture in the air easily condenses into frost or ice and adheres to the heat exchanger of the outdoor unit, affecting the heat exchange effect of the refrigerant and even causing damage to the hardware of the heat exchanger.

[0020] In this regard, the integrated heat pump air-conditioning system provided in the present application, by setting a valve assembly connected to the second end of the first heat exchanger assembly, the anti-frost pipeline and the second end of the second heat exchanger assembly, allows the first refrigerant to enter the anti-frost pipeline at the bottom of the second heat exchanger assembly through the valve assembly under the first working condition. In this way, the hot refrigerant from the first heat exchanger assembly can exchange heat in the anti-frost pipeline at the bottom of the second heat exchanger assembly, thereby effectively preventing the second heat exchanger assembly from frosting at a relatively low cost.

[0021] At the same time, under the second operating condition, the first refrigerant can flow directly to the first heat exchanger assembly after reversing, without passing through the anti-frost pipeline at the bottom of the second heat exchanger assembly after passing through the second heat exchanger assembly. In this way, the problem of the first refrigerant exchanging heat in the anti-frost pipeline at the bottom of the heat exchanger assembly, which leads to a reduction in the refrigeration capacity of the refrigerant, can be avoided.

[0022] In some embodiments, the valve assembly includes a first one-way valve and a second one-way valve; wherein,

[0023] The first one-way valve is disposed between the second end of the first heat exchanger assembly and the anti-frost pipeline;

[0024] The second one-way valve is disposed between the second end of the first heat exchanger assembly and the first end of the second heat exchanger assembly, and the second one-way valve and the first one-way valve are disposed in parallel.

[0025] In some embodiments, the valve assembly is a three-way valve.

[0026] In some embodiments, the outdoor unit includes a first refrigerant circulation pipeline, which is used to exchange heat between the first refrigerant and the air; when the integrated heat pump air-conditioning system is in a first operating condition, the first flow direction of the refrigerant in the first refrigerant circulation pipeline after heat exchange in the first heat exchanger assembly is: passing through the second end of the first heat exchanger assembly, the first one-way valve, the anti-frost pipeline at the bottom of the second heat exchanger assembly, the second end of the second heat exchanger assembly, the first end of the second heat exchanger assembly, through the reversing of the four-way reversing valve, through the first end of the compressor and the second end of the compressor, through the reversing of the four-way reversing valve, and flows from the first end of the first heat exchanger assembly into the first heat exchanger assembly.

[0027] In some embodiments, when the integrated heat pump air-conditioning system is in the second operating condition, the second flow direction of the refrigerant in the first refrigerant circulation pipeline after heat exchange in the first heat exchanger assembly is: passing through the first end of the first heat exchanger assembly, passing through the first end of the compressor and the second end of the compressor after reversing through the four-way reversing valve, passing through the first end of the second heat exchanger assembly and the second end of the second heat exchanger assembly after reversing through the four-way reversing valve, and the second one-way valve, and flowing into the first heat exchanger assembly from the second end of the first heat exchanger assembly.

[0028] In some embodiments, the above-mentioned outdoor unit also includes a first throttle and a third heat exchanger assembly; the first throttle is connected to the second end of the second heat exchanger assembly, and is used to control the flow rate of the refrigerant passing through the second heat exchanger assembly; the third heat exchanger assembly is connected to the compressor, and the third heat exchanger assembly is connected to the first heat exchanger assembly and the second heat exchanger assembly.

[0029] In some embodiments, the outdoor unit further includes a second throttling device, which is connected to the third heat exchanger assembly and is used to control the flow rate of the refrigerant passing through the third heat exchanger assembly.

[0030] In some embodiments, the indoor unit further includes a second refrigerant circulation pipeline, which passes through the interior of the first heat exchanger assembly so that the second refrigerant in the second refrigerant circulation pipeline exchanges heat with the first refrigerant in the first refrigerant circulation pipeline.

[0031] In some embodiments, the outdoor unit of the integrated heat pump air conditioning system further includes: a high-pressure liquid storage tank, disposed between the first heat exchanger assembly and the second heat exchanger assembly, for storing the first refrigerant;

[0032] The stop valve is arranged between the high-pressure liquid storage tank and the second heat exchanger assembly, and is used to control the flow or closing of the closed flow path.

[0033] In some embodiments, the outdoor unit of the integrated heat pump air-conditioning system also includes: a high-pressure pressure switch, which is arranged on the pipeline connected to the second port of the compressor, and is used to disconnect the power supply of the integrated heat pump air-conditioning system when the pressure of the first refrigerant is above a first preset safety threshold.

[0034] a low-pressure switch, disposed on a pipeline connected to the first port of the compressor, for disconnecting the power supply to the integrated heat pump air conditioning system when the pressure of the first refrigerant is below a second preset safety threshold;

[0035] a high-pressure pressure sensor, disposed on a pipeline connected to the second port of the compressor, for monitoring the high-pressure pressure of the first refrigerant;

[0036] The water flow switch is arranged on the second refrigerant circulation pipeline and is used to control the flow or closing of the second refrigerant circulation pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution in the present invention, the drawings required for use in some embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only drawings of some embodiments of the present invention and do not constitute a limitation to the technical solution of the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0038] Figure 1 A schematic structural diagram of an integrated heat pump air conditioning system provided in an embodiment of the present application;

[0039] Figure 2 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0040] Figure 3 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0041] Figure 4 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0042] Figure 5 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0043] Figure 6 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0044] Figure 7 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0045] Figure 8A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0046] Fig. 9 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0047] Fig.10 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0048] Fig.11 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application;

[0049] Fig.12 A schematic structural diagram of another integrated heat pump air conditioning system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] For ease of understanding, the technical solution provided by the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings of the specification. Obviously, the described embodiment is only a part of the embodiment of the proposed technical solution, rather than all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the embodiment of the present invention.

[0051] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, unless otherwise specified, "plurality" means two or more.

[0052] "Including" is interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples" or "some examples" are intended to indicate that specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of the present invention. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0053] The use of "for" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0054] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. For another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0055] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of the regions is exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of the regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0056] To facilitate understanding, the basic concepts of some terms or technologies involved in the embodiments of the present application are first briefly introduced and explained.

[0057] The integrated (water source) heat pump air conditioning system refers to a system that uses water as the heat source or cold source of the heat pump. It absorbs or releases the heat in the water source to achieve heating and cooling of the air conditioner. Its principle is to use the constant temperature of cold and hot sources such as groundwater, lakes or wells for heat exchange.

[0058] When the integrated heat pump air conditioning system is running in the cooling mode, the refrigerant exchanges heat in the indoor heat exchanger (used as an evaporator), absorbs heat in the indoor heat exchanger, and reduces the temperature of the water in the indoor heat exchanger, thereby achieving a cooling effect. After exchanging heat in the indoor heat exchanger, the refrigerant flows back to the compressor. The compressor compresses the low-temperature and low-pressure refrigerant into a high-temperature and high-pressure refrigerant and discharges it to the outdoor heat exchanger (used as a condenser). The high-temperature and high-pressure refrigerant gas exchanges heat in the outdoor heat exchanger. After releasing heat in the outdoor heat exchanger, the refrigerant is cooled and depressurized by the throttling device to become a low-temperature and low-pressure refrigerant, and flows into the indoor heat exchanger for circulation.

[0059] When the integrated heat pump air conditioning system is running in heating mode, the refrigerant undergoes heat exchange in the indoor heat exchanger (used as a condenser), releases heat in the indoor heat exchanger and condenses into a low-temperature and high-pressure refrigerant, while increasing the temperature of the water in the indoor heat exchanger, thereby achieving a heating effect. After releasing heat in the indoor heat exchanger, the refrigerant passes through the throttling device and enters the outdoor heat exchanger (used as an evaporator). After heat exchange in the outdoor heat exchanger to become a low-temperature and low-pressure refrigerant, it flows back to the compressor, and the compressor discharges the high-temperature and high-pressure refrigerant into the indoor heat exchanger for circulation.

[0060] Reasons for frosting in air conditioners: When the outdoor temperature is lower than the dew point temperature of the air conditioning unit, the moisture in the air will condense into frost or ice and adhere to the outdoor heat exchanger.

[0061] The above is an introduction to some concepts involved in the embodiments of the present application, which will not be repeated below.

[0062] As described in the background technology, with the development of the heat pump industry, the design of air conditioning systems tends to be integrated. The integrated heat pump air conditioning system has attracted widespread attention for its advantage of saving installation space. However, in winter, the outdoor temperature is too low, and the moisture in the air easily condenses into frost or ice adheres to the heat exchanger in the outdoor unit of the integrated heat pump air conditioning system, affecting the heat exchange effect of the refrigerant and even causing damage to the hardware of the heat exchanger. In the related art, in order to save installation space, an electric heating method is added to the chassis of the heat exchanger to solve the problem of frost in winter, but the cost is high and the defrosting effect is unsatisfactory.

[0063] In the related art, some integrated heat pump air-conditioning systems only use one throttling device to adjust the refrigerant flow rate during cooling and heating in order to save installation space and optimize costs. However, in winter, the outdoor temperature is too low, and the moisture in the air easily condenses into frost or ice and adheres to the heat exchanger of the outdoor unit, affecting the heat exchange effect of the refrigerant and even causing damage to the hardware of the heat exchanger.

[0064] In view of this, the integrated heat pump air-conditioning system provided in the present application, by setting a valve assembly connected to the second end of the first heat exchanger assembly, the anti-frost pipeline and the second end of the second heat exchanger assembly, allows the first refrigerant to enter the anti-frost pipeline at the bottom of the second heat exchanger assembly through the valve assembly under the first working condition. In this way, the hot refrigerant from the first heat exchanger assembly can exchange heat in the anti-frost pipeline at the bottom of the second heat exchanger assembly, thereby achieving the effect of effectively preventing the second heat exchanger assembly from frosting at a relatively low cost.

[0065] At the same time, under the second operating condition, the first refrigerant can flow directly to the first heat exchanger assembly after reversing, without passing through the anti-frost pipeline at the bottom of the second heat exchanger assembly after passing through the second heat exchanger assembly. In this way, the problem of the first refrigerant exchanging heat in the anti-frost pipeline at the bottom of the heat exchanger assembly, which leads to a reduction in the refrigeration capacity of the refrigerant, can be avoided.

[0066] To further describe the technical solution of the embodiment of the present application, Figure 1 Shown is a structural diagram of an integrated heat pump air conditioning system provided in an embodiment of the present application.

[0067] Reference Figure 1 The integrated heat pump air conditioning system 1 includes an indoor unit 10 and an outdoor unit 20.

[0068] In some embodiments, the indoor unit 10 may include an indoor heat exchanger 101 and a second refrigerant circulation pipeline 102 .

[0069] The indoor heat exchanger 101 is arranged indoors to realize heat exchange between water and indoor air to achieve cooling or heating effects. In cooling conditions, the indoor heat exchanger 101 works as an evaporator, and the second refrigerant evaporates and absorbs heat in the indoor heat exchanger 101 to reduce the indoor air temperature. In heating conditions, the indoor heat exchanger 101 works as a condenser, and the second refrigerant condenses and releases heat in the indoor heat exchanger 101 to increase the indoor air temperature.

[0070] The second refrigerant circulation pipeline 102 passes through the interior of the first heat exchanger assembly so that the second refrigerant in the second refrigerant circulation pipeline exchanges heat with the first refrigerant in the first refrigerant circulation pipeline.

[0071] like Figure 2 As shown, the second refrigerant circulation pipeline 102 includes a refrigerant inlet and a refrigerant outlet. After the second refrigerant in the second refrigerant circulation pipeline 102 exchanges heat with the indoor air in the indoor heat exchanger 101, it exchanges heat with the first refrigerant in the first refrigerant circulation pipeline in the first heat exchanger assembly 202, thereby realizing heat exchange between the indoor side and the outdoor side.

[0072] In some embodiments, Figure 3 As shown, the outdoor unit may include: a compressor 201 , a first heat exchanger assembly 202 , a second heat exchanger assembly 203 , a valve assembly 204 and a four-way reversing valve 205 .

[0073] in,

[0074] The compressor 201 is disposed in the outdoor unit 20 and is used to provide power for the second refrigerant cycle. The compressor 201 includes a first end of the compressor 201 and a second end of the compressor 201. The first end of the compressor 201 is connected to the first heat exchanger assembly 202 through a four-way reversing valve 205, and the second end of the compressor 201 is connected to the second heat exchanger assembly 203 through the four-way reversing valve 205. The first end of the compressor 201 may be an air intake port of the compressor 201, and the second end of the compressor 201 may be an air exhaust port of the compressor 201.

[0075] The first heat exchanger assembly 202 is arranged in the outdoor unit 20, and is used to make the second refrigerant circulation pipeline 102 and the first refrigerant circulation pipeline exchange heat in the first heat exchanger assembly 202. The first heat exchanger assembly 202 includes a first end of the first heat exchanger assembly 202 and a second end of the first heat exchanger assembly 202. Under the refrigeration condition, the first end of the first heat exchanger assembly 202 is connected to the first end of the compressor 201 through the four-way reversing valve 205, and the second end of the first heat exchanger assembly 202 is connected to the second end of the second heat exchanger assembly 203, so that the first refrigerant in the first refrigerant circulation loop absorbs the heat of the second refrigerant in the second refrigerant circulation pipeline 102, so as to achieve the effect of lowering the indoor air temperature. Under heating conditions, the first end of the first heat exchanger assembly 202 is connected to the second end of the compressor 201 through a four-way reversing valve, and the second end of the first heat exchanger assembly 202 is connected to the second end of the second heat exchanger assembly 203, so that the first refrigerant in the first refrigerant circulation loop transfers heat to the second refrigerant in the second refrigerant circulation pipeline 102, so as to achieve the effect of increasing the indoor air temperature.

[0076] Optionally, the first heat exchanger assembly 202 is a water-fluorine heat exchanger, that is, the first refrigerant in the first refrigerant circulation pipeline in the embodiment of the present application can be fluorine, and the second refrigerant in the second refrigerant circulation pipeline can be water, which will not be described in detail below. The water-fluorine heat exchanger is a device that performs heat exchange with the refrigerant water entering the heat exchanger based on the compression refrigeration of the refrigerant fluorine, and the refrigerant water redistributes the flow into the room to perform heat exchange with the indoor air.

[0077] The second heat exchanger assembly 203 is disposed in the outdoor unit 20 and is used for exchanging heat between the first refrigerant in the first refrigerant pipeline and the outdoor air.

[0078] Optional, continue as Figure 3 As shown, the second heat exchanger assembly 203 includes a first end of the second heat exchanger assembly 203 , a second end of the second heat exchanger assembly 203 , and an anti-frost pipeline 2031 .

[0079] The anti-frost pipeline 2031 is disposed at the bottom of the second heat exchanger assembly 203 and is connected to the second end of the second heat exchanger assembly 203 .

[0080] Optionally, the anti-frost pipeline 2031 can be a supercooling section in the second heat exchanger assembly 203. The supercooling section of the heat exchanger assembly refers to a section of the interior of the heat exchanger assembly, which lowers the temperature of the medium to a supercooling state to improve the heat exchange effect of the heat exchanger assembly. At the same time, the cold refrigerant in the supercooling section can also reduce the formation of condensed water on the heat exchanger assembly, thereby protecting the heat exchanger assembly.

[0081] The valve assembly 204 is connected to the second end of the first heat exchanger assembly 202, the anti-frost pipeline 2031, and the second end of the second heat exchanger assembly 203. In the first working condition, the valve assembly 204 is used to allow the first refrigerant to pass through the second end of the first heat exchanger assembly 202, enter the anti-frost pipeline 2031, and then pass through the second end of the second heat exchanger assembly 203 and the first end of the second heat exchanger assembly 203; in the second working condition, the valve assembly is used to allow the first refrigerant to pass through the first end of the second heat exchanger assembly 203 and the second end of the second heat exchanger assembly 203, and then directly flow to the second end of the first heat exchanger assembly 202.

[0082] In a possible implementation, the valve assembly 204 includes a first one-way valve 2041 and a second one-way valve 2042, wherein:

[0083] The first one-way valve 2041 is disposed between the second end of the first heat exchanger assembly 202 and the anti-frost pipeline 2031 .

[0084] The second one-way valve 2042 is disposed between the second end of the first heat exchanger assembly 202 and the first end of the second heat exchanger assembly 203 , and the second one-way valve 2042 and the first one-way valve 2041 are disposed in parallel.

[0085] Optionally, the first one-way valve 2041 and the second one-way valve 2042 may be solenoid valves.

[0086] In the heating condition, the first refrigerant flowing out of the first heat exchanger assembly 202 passes through the first check valve 2041, the anti-frost pipe 2031, the second end of the second heat exchanger assembly 203, and the first end of the second heat exchanger assembly 203 in sequence, and flows to the compressor 201. In this way, when the hot first refrigerant flowing out of the first heat exchanger assembly 202 passes through the anti-frost pipe 2031, the temperature of the anti-frost pipe 2031 can be increased to prevent the second heat exchanger assembly 203 from frosting or ice.

[0087] Under refrigeration conditions, the first refrigerant flowing out of the first heat exchanger assembly 202 passes through the first end of the second heat exchanger assembly 203, the second end of the second heat exchanger assembly 203, and the second one-way valve 2042 in sequence, and flows to the first heat exchanger assembly 202. Since the first one-way valve 2041 and the second one-way valve 2042 are connected in parallel, and the flow directions of the first one-way valve 2041 and the second one-way valve 2042 are opposite, the first refrigerant does not need to pass through the anti-frost pipeline 2031 under refrigeration conditions, thereby improving the refrigeration capacity of the first refrigerant.

[0088] Optionally, the second heat exchanger assembly 203 may be a fin heat exchanger.

[0089] Figure 3The illustrated embodiment brings at least the following beneficial effects: since the outdoor temperature is too low in winter, moisture in the air easily condenses into frost or ice and adheres to the heat exchanger of the outdoor unit, affecting the heat exchange effect of the refrigerant and even causing damage to the hardware of the heat exchanger.

[0090] In this regard, the integrated heat pump air-conditioning system provided in the present application, by setting a valve assembly connected to the second end of the first heat exchanger assembly, the anti-frost pipeline and the second end of the second heat exchanger assembly, allows the first refrigerant to enter the anti-frost pipeline at the bottom of the second heat exchanger assembly through the valve assembly under the first working condition. In this way, the hot refrigerant from the first heat exchanger assembly can exchange heat in the anti-frost pipeline at the bottom of the second heat exchanger assembly, thereby effectively preventing the second heat exchanger assembly from frosting at a relatively low cost.

[0091] At the same time, under the second operating condition, the first refrigerant can flow directly to the first heat exchanger assembly after reversing, without passing through the anti-frost pipeline at the bottom of the second heat exchanger assembly after passing through the second heat exchanger assembly. In this way, the problem of the first refrigerant exchanging heat in the anti-frost pipeline at the bottom of the heat exchanger assembly, which leads to a reduction in the refrigeration capacity of the refrigerant, can be avoided.

[0092] In another possible implementation, Figure 4 As shown, the valve assembly 204 may be a three-way valve. In the heating condition, the valve assembly 204 connects the second end of the first heat exchanger assembly 202 with the anti-frost pipeline 2031, so that the first refrigerant passes through the second end of the first heat exchanger assembly 202, enters the anti-frost pipeline 2031, and then passes through the second end of the second heat exchanger assembly 203 and the first end of the second heat exchanger assembly 203. In the cooling condition, the valve assembly 204 directly connects the second end of the first heat exchanger assembly 202 with the second end of the second heat exchanger assembly 203, so that the first refrigerant flowing out of the second heat exchanger assembly 203 directly flows into the second end of the first heat exchanger assembly 202 without passing through the anti-frost pipeline 2031.

[0093] Four-way reversing valve 205, such as Figure 5 As shown, it includes end a, end b, end c and end d, and different refrigerant flow directions can be achieved by connecting different ends.

[0094] Among them, during the first reversal, the b end and the c end of the four-way reversing valve 205 are connected to connect the first end of the second heat exchanger assembly 203 and the first end of the compressor 201; during the second reversal, the a end and the d end of the four-way reversing valve 205 are connected to connect the first end of the compressor 201 and the first end of the first heat exchanger assembly 202; during the third reversal, the d end and the c end of the four-way reversing valve 205 are connected to connect the first end of the first heat exchanger assembly 202 and the first end of the compressor 201; during the fourth reversal, the a end and the d end of the four-way reversing valve 205 are connected to connect the first end of the compressor 201 and the first end of the second heat exchanger assembly 203.

[0095] In some embodiments, Figure 6 As shown, the first end of the compressor 201, the first end of the first heat exchanger assembly 202, the second end of the first heat exchanger assembly 202, the second end of the second heat exchanger assembly 203, the first end of the second heat exchanger assembly 203, the four-way reversing valve 205 and the second end of the compressor 201 are connected in sequence to form a closed flow path.

[0096] In some embodiments, when the integrated heat pump air conditioning system 1 is in the first working condition, Figure 7 As shown, the first flow direction of the first refrigerant in the first refrigerant circulation pipeline after heat exchange in the first heat exchanger assembly 202 is: passing through the second end of the first heat exchanger assembly 202, the first one-way valve 2041, the anti-frost pipeline at the bottom of the second heat exchanger assembly 203, the second end of the second heat exchanger assembly 203, the first end of the second heat exchanger assembly 203, through the first reversal of the four-way reversing valve 205, through the first end of the compressor 201 and the second end of the compressor 201, through the second reversal of the four-way reversing valve 205, and flows from the first end of the first heat exchanger assembly 202 into the first heat exchanger assembly 202.

[0097] Optionally, the first operating condition is a heating condition.

[0098] In some embodiments, when the integrated heat pump air conditioning system 1 is in the second working condition, Figure 8 As shown, the second flow direction of the first refrigerant in the first refrigerant circulation pipeline after heat exchange in the first heat exchanger assembly 202 is: passing through the first end of the first heat exchanger assembly 202, passing through the third reversal of the four-way reversing valve 205, passing through the first end of the compressor 201 and the second end of the compressor 201, passing through the fourth reversal of the four-way reversing valve, passing through the first end of the second heat exchanger assembly 203 and the second end of the second heat exchanger assembly 203, and the second one-way valve 2042, and flowing into the first heat exchanger assembly 202 from the second end of the first heat exchanger assembly 202.

[0099] Optionally, the second operating condition is a refrigeration condition.

[0100] In some embodiments, Fig. 9 As shown, the outdoor unit 20 may further include: a first throttling member 207 , a third heat exchanger assembly 208 and a second throttling member 209 .

[0101] The first throttling element 207 is disposed between the second end of the second heat exchanger assembly 203 and the anti-frost pipeline 2031 , and is used to control the flow rate of the first refrigerant flowing into or out of the second heat exchanger assembly 203 .

[0102] The third heat exchanger assembly 208 is disposed in the outdoor unit 20, and the third heat exchanger assembly 208 is communicated with the third end of the compressor 201, and the third heat exchanger assembly 208 is communicated with the first heat exchanger assembly 202 and the second heat exchanger assembly 203. The third heat exchanger assembly 208 is used to exchange heat between the first refrigerant of high temperature and high pressure and the third refrigerant of low temperature and low pressure in the third heat exchanger assembly 208 by heat transfer, thereby achieving the purpose of replenishing air and increasing enthalpy of the compressor 201, wherein the third refrigerant can be an air replenishing agent.

[0103] The second throttling element 209 is in communication with the third heat exchanger assembly 208 and is used to control the flow rate of the refrigerant passing through the third heat exchanger assembly 208 .

[0104] When the integrated heat pump air conditioning system 1 is in the heating state, Fig.10 As shown, a portion of the refrigerant entering from the first end of the compressor 201 flows out through the second end of the compressor 201, and the other portion passes through the third end of the compressor 201 and then flows through the third heat exchanger assembly 208, the second throttling device 209, and then passes through the third heat exchanger assembly 208 again, and then flows from the first one-way valve 2041 to the second heat exchanger assembly 203.

[0105] When the integrated heat pump air conditioning system 1 is in cooling condition, Fig.11 As shown, part of the refrigerant flowing out of the second one-way valve 2042 passes through the third heat exchanger 208 and flows directly to the first heat exchanger 202, and the other part passes through the third heat exchanger 208, the second throttling device 209, and then passes through the third heat exchanger 208 again before flowing into the third end of the compressor 201.

[0106] Optionally, the third heat exchanger assembly 208 is a plate heat exchanger.

[0107] In the refrigeration cycle, the compressor 201 will suck in the low-temperature and low-pressure first refrigerant and compress it into a high-temperature and high-pressure gas, and then exchange heat with the third refrigerant through the third heat exchanger assembly 208. Through heat exchange, the high-temperature and high-pressure first refrigerant transfers heat to the third refrigerant, causing the third refrigerant to heat up. At the same time, the temperature of the high-temperature and high-pressure first refrigerant itself decreases, thereby further improving the refrigeration effect of the first refrigerant. That is, the third heat exchanger assembly 208 is used to realize the function of replenishing air and increasing enthalpy for the compressor 201, thereby improving the efficiency and performance of the refrigeration cycle.

[0108] The second throttling element 209 is connected to the third heat exchanger assembly 208 and is used to control the flow rate of the refrigerant flowing through the third heat exchanger assembly 208 .

[0109] In some embodiments, Fig.12 As shown, the outdoor unit 20 may further include: a high-pressure liquid reservoir 210, a stop valve 211, a high-pressure pressure switch 212, a low-pressure pressure switch 213, a high-pressure pressure sensor 214 and a water flow switch 215.

[0110] The high-pressure liquid storage tank 210 is disposed between the first heat exchanger assembly 202 and the second heat exchanger assembly 203, and is used to store the first refrigerant. During the operation of the integrated heat pump air conditioning system 1, the high-pressure liquid storage tank 210 plays a role in balancing the flow and pressure of the first refrigerant, helping to control the circulation of the first refrigerant in the integrated heat pump air conditioning system 1, and ensuring the stability and normal operation of the integrated heat pump air conditioning system 1.

[0111] The stop valve 211 is disposed between the high-pressure liquid storage tank 210 and the second heat exchanger assembly 203 and is used to control the flow or closing of the closed flow path.

[0112] The high-pressure switch 212 is disposed on a pipeline connected to the second end of the compressor 201 , and is used to monitor the high-pressure state of the first refrigerant in the integrated heat pump air-conditioning system 1 .

[0113] Optionally, when the high-pressure pressure switch 212 detects that the pressure of the first refrigerant exceeds a first preset safety pressure threshold, the high-pressure pressure switch 212 will trigger an alarm or cut off the power supply of the integrated heat pump air-conditioning system 1, and stop the operation of the compressor 201 to avoid overloading or damage to the integrated heat pump air-conditioning system 1.

[0114] The low pressure switch 213 is arranged on the pipeline connected to the first end of the compressor 201 and is used to monitor the low pressure state of the first refrigerant in the integrated heat pump air-conditioning system 1 .

[0115] Optionally, when the low-pressure pressure switch 213 detects that the pressure of the first refrigerant is lower than a first preset safety pressure threshold, the low-pressure pressure switch 213 will trigger an alarm or cut off the power supply of the integrated heat pump air-conditioning system 1, and stop the operation of the compressor 201 to protect the safety of the integrated heat pump air-conditioning system 1.

[0116] The high-pressure pressure sensor 214 is disposed on a pipeline connected to the second end of the compressor 201, and is used to monitor the high-pressure state of the first refrigerant in the integrated heat pump air-conditioning system 1 and transmit the high-pressure data to the control system.

[0117] The water flow switch 215 is disposed at the refrigerant outlet of the second refrigerant circulation pipeline 102 and is used to control the flow or closing of the second refrigerant pipeline.

[0118] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other changes to the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0119] Although the present application is described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0120] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An integrated heat pump air conditioning system, characterized in that: include: Indoor unit; An outdoor unit, the outdoor unit comprising: compressor; Four-way reversing valve; A first heat exchanger assembly, used for exchanging heat with the indoor unit; a second heat exchanger assembly; and an anti-frost pipeline, the anti-frost pipeline being arranged at the bottom of the second heat exchanger assembly; Wherein, the first end of the compressor, the first end of the first heat exchanger assembly, the second end of the first heat exchanger assembly, the second end of the second heat exchanger assembly, the first end of the second heat exchanger assembly, the four-way reversing valve and the second end of the compressor are sequentially connected to form a closed flow path; A valve assembly, wherein the valve assembly is connected to the second end of the first heat exchanger assembly, the anti-frost pipeline and the second end of the second heat exchanger assembly; wherein, In the first working condition, the valve assembly is used to allow the first refrigerant to pass through the second end of the first heat exchanger assembly, enter the anti-frost pipeline, and then pass through the second end of the second heat exchanger assembly and the first end of the second heat exchanger assembly; In the second working condition, the valve assembly is used to allow the first refrigerant to flow directly to the second end of the first heat exchanger assembly after passing through the first end of the second heat exchanger assembly and the second end of the second heat exchanger assembly.

2. The integrated heat pump air conditioning system according to claim 1, characterized in that: The valve assembly includes a first one-way valve and a second one-way valve; wherein, The first one-way valve is disposed between the second end of the first heat exchanger assembly and the anti-frost pipeline; The second one-way valve is disposed between the second end of the first heat exchanger assembly and the first end of the second heat exchanger assembly, and the second one-way valve and the first one-way valve are disposed in parallel.

3. The integrated heat pump air conditioning system according to claim 1, characterized in that: The valve assembly is a three-way valve.

4. The integrated heat pump air conditioning system according to claim 2, characterized in that: The outdoor unit comprises a first refrigerant circulation pipeline, wherein the first refrigerant circulation pipeline is used to exchange heat between the first refrigerant and air; When the integrated heat pump air-conditioning system is in the first operating condition, the first flow direction of the first refrigerant in the first refrigerant circulation pipeline after heat exchange in the first heat exchanger assembly is: passing through the second end of the first heat exchanger assembly, the first one-way valve, the anti-frost pipeline at the bottom of the second heat exchanger assembly, the second end of the second heat exchanger assembly, the first end of the second heat exchanger assembly, through the reversing of the four-way reversing valve, through the first end of the compressor and the second end of the compressor, through the reversing of the four-way reversing valve, and flows from the first end of the first heat exchanger assembly into the first heat exchanger assembly.

5. The integrated heat pump air conditioning system according to claim 4, characterized in that: When the integrated heat pump air-conditioning system is in the second operating condition, the second flow direction of the first refrigerant in the first refrigerant circulation pipeline after heat exchange in the first heat exchanger assembly is: passing through the first end of the first heat exchanger assembly, passing through the first end of the compressor and the second end of the compressor after reversing through the four-way reversing valve, passing through the first end of the second heat exchanger assembly and the second end of the second heat exchanger assembly after reversing through the four-way reversing valve, and the second one-way valve, and flowing into the first heat exchanger assembly from the second end of the first heat exchanger assembly.

6. The integrated heat pump air conditioning system according to any one of claims 1 to 5, characterized in that: The outdoor unit also includes a first throttle and a third heat exchanger assembly; The first throttling element is connected to the second end of the second heat exchanger assembly and is used to control the flow rate of the refrigerant passing through the second heat exchanger assembly; The third heat exchanger assembly is in communication with the compressor, and the third heat exchanger assembly is in communication with the first heat exchanger assembly and the second heat exchanger assembly.

7. The integrated heat pump air conditioning system according to claim 6, characterized in that: The outdoor unit also includes a second throttling member; The second throttling element is communicated with the third heat exchanger assembly and is used to control the flow rate of the refrigerant passing through the third heat exchanger assembly.

8. The integrated heat pump air conditioning system according to claim 3 or 4, characterized in that: The indoor unit includes a second refrigerant circulation pipeline, and the second refrigerant circulation pipeline passes through the interior of the first heat exchanger assembly so that the second refrigerant in the second refrigerant circulation pipeline exchanges heat with the first refrigerant in the first refrigerant circulation pipeline.

9. The integrated heat pump air conditioning system according to claim 1, characterized in that: Also includes: a high-pressure liquid storage tank, disposed between the first heat exchanger assembly and the second heat exchanger assembly, and used for storing the first refrigerant; The stop valve is arranged between the high-pressure liquid storage tank and the second heat exchanger assembly, and is used to control the flow or closing of the closed flow path.

10. The integrated heat pump air conditioning system according to claim 8, characterized in that: Also includes: a high-pressure switch, disposed on a pipeline connected to the second port of the compressor, for disconnecting the power supply of the integrated heat pump air-conditioning system when the pressure of the first refrigerant is above a first preset safety threshold; a low-pressure switch, disposed on a pipeline connected to the first port of the compressor, for disconnecting the power supply of the integrated heat pump air-conditioning system when the pressure of the first refrigerant is below a second preset safety threshold; a high-pressure pressure sensor, disposed on a pipeline connected to the second port of the compressor, for monitoring the high-pressure pressure of the first refrigerant; The water flow switch is arranged on the second refrigerant circulation pipeline and is used to control the flow or closing of the second refrigerant circulation pipeline.

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