Four-pipe control system and air conditioner

Abstract

The utility model belongs to the technical field of air conditioners, and particularly relates to a four-pipe system and an air conditioner. The four-pipe system comprises a refrigerant circulating pipeline and a refrigerant adjusting pipeline, the refrigerant adjusting pipeline communicates with the refrigerant circulating pipeline in a parallel connection mode, a liquid storage assembly is arranged on the refrigerant adjusting pipeline, and the liquid storage assembly can selectively communicate with the refrigerant circulating pipeline so as to adjust the refrigerant amount in the refrigerant circulating pipeline. According to the four-pipe system, the refrigerant adjusting pipeline connected with the refrigerant circulating pipeline in parallel is arranged, the liquid storage assembly is arranged on the refrigerant adjusting pipeline, and the liquid storage assembly can be selectively communicated with the refrigerant circulating pipeline so as to adjust the refrigerant amount in the refrigerant circulating pipeline; therefore, the refrigerant in the refrigerant circulation pipeline can be absorbed through the liquid storage assembly or the refrigerant stored in the liquid storage assembly is released into the refrigerant circulation pipeline, and fine adjustment of the amount of the refrigerant in the refrigerant circulation pipeline is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a four-pipe system and an air conditioner. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] The four-pipe system is an air conditioning host system that can realize independent cooling water, independent hot water production, and simultaneous heating and cooling functions.

[0004] The four-pipe system includes a compressor, a four-way valve, a hot water heat exchanger, an air-cooled heat exchanger, an electronic expansion valve, a liquid storage component and a cold water heat exchanger. When the four-pipe system is in different working modes, the demand for the amount of refrigerant is inconsistent. The liquid storage component is usually set on the high-pressure side of the electronic expansion valve, and the amount of refrigerant on the low-pressure side is controlled by adjusting the opening of the electronic expansion valve. It is impossible to finely adjust the amount of circulating refrigerant according to the working mode of the four-pipe system. Utility Model Content

[0005] The purpose of the utility model is to at least solve the problem that the four-pipe system in the prior art cannot finely adjust the amount of circulating refrigerant according to the working mode. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the utility model provides a four-control system, the four-control system comprising:

[0007] Refrigerant circulation piping; and

[0008] A refrigerant regulating pipeline is connected in parallel with the refrigerant circulation pipeline, and a liquid storage component is provided on the refrigerant regulating pipeline. The liquid storage component can be selectively connected with the refrigerant circulation pipeline to regulate the amount of refrigerant in the refrigerant circulation pipeline.

[0009] According to the four-pipe system of the utility model, a refrigerant regulating pipeline is arranged in parallel with the refrigerant circulation pipeline, wherein a liquid storage component is arranged on the refrigerant regulating pipeline, and the liquid storage component can be selectively connected with the refrigerant circulation pipeline to adjust the amount of refrigerant in the refrigerant circulation pipeline. The refrigerant in the refrigerant circulation pipeline can be absorbed by the liquid storage component or the refrigerant stored in the liquid storage component can be released into the refrigerant circulation pipeline, thereby realizing fine adjustment of the refrigerant amount in the refrigerant circulation pipeline.

[0010] In addition, the four-pipe system of the utility model may also have the following additional technical features:

[0011] In some embodiments of the present invention, the refrigerant regulating pipeline includes a first pipeline, both ends of which are respectively connected to the refrigerant circulation pipeline and one end of the liquid storage assembly, wherein a first valve is provided on the first pipeline.

[0012] In some embodiments of the utility model, the refrigerant circulation pipeline includes a compressor, a four-way valve and a heat exchange component connected in sequence through a pipeline;

[0013] The first pipeline is connected to the heat exchange component.

[0014] In some embodiments of the utility model, the refrigerant circulation pipeline further includes a first electronic expansion valve, the heat exchange assembly includes an air-cooled heat exchanger and a cold water heat exchanger, the four-way valve, the air-cooled heat exchanger, the first electronic expansion valve and the cold water heat exchanger are sequentially connected along the exhaust direction of the compressor, and the compressor, the four-way valve, the air-cooled heat exchanger, the first electronic expansion valve and the cold water heat exchanger form a refrigeration circulation path;

[0015] The first pipeline is in communication with a suction side of the compressor.

[0016] In some embodiments of the present invention, a first control valve is provided on the refrigeration flow path, and two ends of the first control valve are respectively connected to the air-cooled heat exchanger and the first electronic expansion valve.

[0017] In some embodiments of the utility model, the refrigerant circulation pipeline further includes a second electronic expansion valve, the heat exchange assembly includes an air-cooled heat exchanger and a hot water heat exchanger, the four-way valve, the hot water heat exchanger, the second electronic expansion valve and the air-cooled heat exchanger are sequentially connected along the exhaust direction of the compressor, and the compressor, the four-way valve, the hot water heat exchanger, the second electronic expansion valve and the air-cooled heat exchanger form a heating flow path;

[0018] The first pipeline is connected to the inlet end of the second electronic expansion valve, and a first valve is provided on the first pipeline. The first pipeline is selectively connected to adjust the amount of refrigerant in the refrigerant circulation pipeline.

[0019] In some embodiments of the utility model, the refrigerant circulation pipeline further includes a first electronic expansion valve, the heat exchange assembly includes an air-cooled heat exchanger, a hot water heat exchanger and a cold water heat exchanger, the four-way valve, the hot water heat exchanger, the first electronic expansion valve and the cold water heat exchanger are sequentially connected along the exhaust direction of the compressor, and the compressor, the four-way valve, the hot water heat exchanger, the first electronic expansion valve and the cold water heat exchanger form a simultaneous cooling and heating flow path;

[0020] The first pipeline is in communication with an outlet end of the cold water heat exchanger.

[0021] In some embodiments of the present invention, a second control valve is provided on the simultaneous cooling and heating flow path, and two ends of the second control valve are respectively connected to the first electronic expansion valve and the hot water heat exchanger.

[0022] In some embodiments of the present invention, the refrigerant regulating pipeline also includes a second pipeline, both ends of which are respectively connected to the other end of the liquid storage assembly and the refrigerant circulation pipeline, and a second valve is provided on the second pipeline.

[0023] In some embodiments of the present invention, at least one of the first valve and the second valve is a solenoid valve.

[0024] A second aspect of the utility model provides an air conditioner, which includes the four-pipe system as described in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0026] Figure 1 The schematic diagram shows the structure of the four-pipe system in the single cooling water mode;

[0027] Figure 2 The schematic diagram shows the structure of the four-pipe system in the single hot water production mode;

[0028] Figure 3 The schematic diagram shows the structure of a four-pipe system in simultaneous cooling and heating mode.

[0029] The reference numerals are as follows:

[0030] 100. Four control systems;

[0031] 10. Refrigerant circulation pipeline; 11. Compressor; 12. Four-way valve; 121. First port; 122. Second port; 123. Third port; 124. Fourth port; 13. Air-cooled heat exchanger; 14. First electronic expansion valve; 15. Cold water heat exchanger; 151. First inlet; 152. First outlet; 16. First control valve; 17. Second electronic expansion valve; 18. Second control valve; 19. Hot water heat exchanger; 191. Second inlet; 192. Second outlet;

[0032] 101, first refrigerant pipe; 102, second refrigerant pipe; 103, third refrigerant pipe; 1031, first sub-pipe; 1032, second sub-pipe; 104, fourth refrigerant pipe; 105, fifth refrigerant pipe; 1051, third sub-pipe; 1052, fourth sub-pipe; 106, sixth refrigerant pipe;

[0033] 20. Refrigerant regulating pipeline; 21. Liquid storage component; 22. First pipeline; 23. Second pipeline; 24. First valve; 25. Second valve. DETAILED DESCRIPTION

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0036] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0037] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0038] like Figures 1 to 3 As shown, according to the first aspect of the implementation of the utility model, a four-pipe system 100 is proposed. Figure 1 The schematic diagram shows the structure of the four-pipe system 100 in the single cooling mode. Figure 2 The schematic diagram shows the structure of the four-pipe system 100 in the single heating mode. Figure 3 The schematic diagram of the structure of the four-pipe system 100 in the simultaneous cooling and heating mode is schematically shown. The four-pipe system 100 includes a refrigerant circulation pipeline 10, and the four-pipe system 100 also includes a refrigerant regulating pipeline 20. The refrigerant circulation pipeline 10 and the refrigerant regulating pipeline 20 are connected in parallel, and a liquid storage component 21 is provided on the refrigerant regulating pipeline 20. The liquid storage component 21 can be selectively connected to the refrigerant circulation pipeline 10 to adjust the amount of refrigerant in the refrigerant circulation pipeline 10.

[0039] It should be noted that the four-pipe system 100 is an air conditioning host system capable of realizing the functions of independent cooling water, independent hot water production, and simultaneous heating and cooling, and has three working modes, namely, independent hot water production mode, independent cooling water mode, and simultaneous heating and cooling mode. Among them, when the four-pipe system 100 is in different working modes, the demand for the amount of refrigerant is inconsistent. Specifically, when the four-pipe system 100 is in the independent cooling water mode, the four-pipe system 100 requires the largest amount of refrigerant, and all refrigerants need to be involved in the circulation of the refrigerant circulation pipeline 10. When the four-pipe system 100 is in the independent hot water production mode, the amount of refrigerant required by the refrigerant circulation pipeline 10 is in the middle, and the amount of refrigerant in the refrigerant circulation pipeline 10 needs to be dynamically adjusted; when the four-pipe system 100 is in the simultaneous cooling and heating mode, the amount of refrigerant required by the four-pipe system 100 is the least. At this time, the amount of refrigerant in the refrigerant circulation pipeline 10 needs to be reduced, so as to achieve fine adjustment of the amount of refrigerant.

[0040] According to the four-pipe system 100 of the utility model, a refrigerant regulating pipeline 20 is provided in parallel with the refrigerant circulation pipeline 10, wherein a liquid storage component 21 is provided on the refrigerant regulating pipeline 20, and the liquid storage component 21 is selectively connected to the refrigerant circulation pipeline 10 to regulate the amount of refrigerant in the refrigerant circulation pipeline 10. The refrigerant in the refrigerant circulation pipeline 10 can be absorbed by the liquid storage component 21 or the refrigerant stored in the liquid storage component 21 can be released into the refrigerant circulation pipeline 10, thereby realizing fine regulation of the refrigerant amount in the refrigerant circulation pipeline 10.

[0041] It should be emphasized that the liquid storage component 21 mentioned here can be a liquid storage tank or other container for storing refrigerant, which can realize the storage of refrigerant. In addition, the liquid storage component 21 is selectively connected with the refrigerant circulation pipeline 10 to adjust the amount of refrigerant in the refrigerant circulation pipeline 10, which means that the liquid storage component 21 and the refrigerant circulation pipeline 10 can be disconnected or connected, and can be selected according to the working mode of the four-pipe system 100 to adjust the amount of refrigerant in the refrigerant circulation pipeline 10.

[0042] Alternatively, if Figure 1 As shown, the refrigerant regulating pipeline 20 includes a first pipeline 22, which can be a circular tube or a rectangular tube, and has two ends, which are respectively connected to the refrigerant circulation pipeline 10 and one end of the liquid storage component 21, wherein a first valve 24 is provided on the first pipeline 22.

[0043] The first valve 24 here is used to control the connection or disconnection of the first pipeline 22, wherein, when the first valve 24 is in an open state, the first pipeline 22 is in a connected state, and one end of the liquid storage component 21 can be connected with the refrigerant circulation pipeline 10.

[0044] The first valve 24 here may be a solenoid valve or other valve capable of realizing automatic control.

[0045] Optionally, a compressor 11, a four-way valve 12 and a heat exchange component that are interconnected are provided on the refrigerant circulation pipeline 10 of the four-pipe system 100. These components can be connected in sequence through pipelines, wherein the first pipeline 22 is connected to the heat exchange component.

[0046] The number of heat exchange components here can be one, two or more, and the corresponding heat exchange components can be selected to work according to needs.

[0047] Specifically, the heat exchange component includes an air-cooled heat exchanger 13, a cold water heat exchanger 15 and a hot water heat exchanger 19, wherein the first pipeline 22 is connected to the cold water heat exchanger 15, and the four-pipe system 100 selects different heat exchange components to enter the circulation process according to different working modes.

[0048] Continue to refer to Figure 1 As shown, the four-pipe system 100 includes a plurality of pipelines, wherein the compressor 11 and the four-way valve 12 are connected through the first refrigerant pipe 101, the four-way valve 12 is connected to the air-cooled heat exchanger 13 through the second refrigerant pipe 102, the air-cooled heat exchanger 13 is connected to the cold water heat exchanger 15 through the first sub-pipe 1031 of the third refrigerant pipe 103, and the air-cooled heat exchanger 13 is connected to the hot water heat exchanger 19 through the second sub-pipe 1032 of the third refrigerant pipe 103, wherein the first sub-pipe 1031 is provided with a first control valve 16 and a first electronic expansion valve 14, and the second sub-pipe 1032 is provided with a second electronic expansion valve 17. The first sub-pipe 1031 and the second sub-pipe 1032 are connected through the fourth refrigerant pipe 104, and the fourth refrigerant pipe 104 is provided with a second control valve 18.

[0049] Optionally, the hot water heat exchanger 19 is connected to the four-way valve 12 via the sixth refrigerant pipe 106, the cold water heat exchanger 15 is connected to the compressor 11 via the fourth sub-pipe 1052 of the fifth refrigerant pipe 105, and the cold water heat exchanger 15 is connected to the four-way valve 12 via the third sub-pipe 1051 of the fifth refrigerant pipe 105. The four-pipe system 100 is controlled by opening and closing different pipelines, thereby realizing different operating modes of the four-pipe system 100.

[0050] The following will introduce the four-pipe system 100 in different working modes.

[0051] Alternatively, if Figure 1 As shown, when the refrigerant circulation pipeline 10 is in the single cooling water mode, the four-way valve 12, the air-cooled heat exchanger 13, the first electronic expansion valve 14 and the cold water heat exchanger 15 are arranged in sequence along the exhaust direction of the compressor 11, and a refrigeration flow path can be formed between these components; the first pipeline 22 can be connected to the suction side of the compressor 11, wherein the first valve 24 is in an open state.

[0052] It should be noted that the air-cooled heat exchanger 13 here can be a finned heat exchanger with a good heat exchange effect. The four-way valve 12 here has four interfaces, namely a first port 121, a second port 122, a third port 123 and a fourth port 124. The air outlet of the compressor 11 is connected to the first port 121 of the four-way valve 12, the second port 122 of the four-way valve 12 is connected to the inlet of the cold water heat exchanger 15, the outlet of the cold water heat exchanger 15 is connected to the inlet of the first electronic expansion valve 14, the outlet of the first electronic expansion valve 14 is connected to the inlet of the cold water heat exchanger 15, and the outlet of the cold water heat exchanger 15 is connected to the air inlet of the compressor 11, so that the circulation of the refrigerant can be realized.

[0053] Specifically, the air outlet of the compressor 11 is connected to the first port 121 of the four-way valve 12 through the first refrigerant pipe 101, the second port 122 of the four-way valve 12 is connected to the inlet of the cold water heat exchanger 15 through the second refrigerant pipe 102, the outlet of the cold water heat exchanger 15 is connected to the inlet of the first electronic expansion valve 14 through the third refrigerant pipe 103 and the first sub-pipe 1031, the outlet of the first electronic expansion valve 14 is connected to the inlet of the cold water heat exchanger 15 through the first sub-pipe 1031, and the outlet of the cold water heat exchanger 15 is connected to the air inlet of the compressor 11 through the fifth refrigerant pipe 105 and the fourth sub-pipe 1052.

[0054] Among them, Figure 1 In the diagram, the refrigerant flows in the direction indicated by the arrow.

[0055] Optionally, the cold water heat exchanger 15 is provided with a first inlet 151 and a first outlet 152 , wherein the first inlet 151 is connected to a water source, and the first outlet 152 is connected to an output end of a user, so as to provide cold water to the user.

[0056] In some embodiments of the utility model, a first control valve 16 is provided on the refrigeration flow path, wherein the two ends of the first control valve 16 are respectively connected to the air-cooled heat exchanger 13 and the first electronic expansion valve 14, that is, when the refrigerant circulates, after flowing out of the air-cooled heat exchanger 13, it passes through the first control valve 16 and the first electronic expansion valve 14 in sequence, wherein the first control valve 16 can adopt a one-way valve structure to realize the one-way flow of the refrigerant.

[0057] from Figure 1 The structure shown in the figure can be determined that when the refrigerant circulation pipeline 10 is in the single cooling water mode, the air outlet of the compressor 11 is connected to the first port 121 of the four-way valve 12, the second port 122 of the four-way valve 12 is connected to the inlet of the air-cooled heat exchanger 13, the outlet of the air-cooled heat exchanger 13 is connected to the inlet of the first control valve 16, the outlet of the first control valve 16 is connected to the inlet of the first electronic expansion valve 14, the outlet of the first electronic expansion valve 14 is connected to the inlet of the cold water heat exchanger 15, and the outlet of the cold water heat exchanger 15 is connected to the air inlet of the compressor 11, so that the circulation of the refrigerant can be realized. In this mode, after the refrigerant flows out of the compressor 11, it passes through the four-way valve 12, the air-cooled heat exchanger 13, the first control valve 16, the first electronic expansion valve 14 and the cold water heat exchanger 15 in sequence and then returns to the compressor 11, realizing the circulation of the refrigerant. The flow path is represented by a dotted line.

[0058] When the refrigerant circulation pipeline 10 is in the single cooling water mode, the first valve 24 of the refrigerant regulating pipeline 20 is in an open state, and the first pipeline 22 is in a connected state, so that one end of the liquid storage component 21 can be connected with the refrigerant circulation pipeline 10. All refrigerants of the liquid storage component 21 can pass through the first pipeline 22, the hot water heat exchanger 19, the fourth port 124 of the four-way valve 12, and the third port 123 of the four-way valve 12 in sequence and then be transported to the compressor 11, so that all the refrigerants are involved in the circulation process of the refrigerant circulation pipeline 10. In the single cooling water mode, there is no refrigerant inside the liquid storage component 21, and all the refrigerants are involved in the refrigerant circulation pipeline 10.

[0059] In some embodiments of the utility model, the refrigerant regulating pipeline 20 also includes a second pipeline 23, the two ends of the second pipeline 23 are respectively connected to the other end of the liquid storage component 21 and the refrigerant circulation pipeline 10, and a second valve 25 is provided on the second pipeline 23. At this time, the second valve 25 is in a closed state and can disconnect the second pipeline 23.

[0060] In some embodiments of the present invention, Figure 2 As shown, when the refrigerant circulation pipeline 10 is in the single hot water production mode, the refrigerant circulation pipeline 10 includes a compressor 11, and a four-way valve 12, a hot water heat exchanger 19, a second electronic expansion valve 17 and an air-cooled heat exchanger 13 are arranged in sequence along the exhaust direction of the compressor 11. The compressor 11, the four-way valve 12, the hot water heat exchanger 19, the second electronic expansion valve 17 and the air-cooled heat exchanger 13 form a heating flow path; the first pipeline 22 is connected to the inlet end of the second electronic expansion valve 17, and a first valve 24 is arranged on the first pipeline 22. The first pipeline 22 is selectively connected to adjust the amount of refrigerant in the refrigerant circulation pipeline 10.

[0061] Optionally, the hot water heat exchanger 19 is provided with a second inlet 191 and a second outlet 192, wherein the second inlet 191 is connected to a water source, and the second outlet 192 is connected to an output end of a user, so as to provide hot water for the user.

[0062] It should be noted that the first pipeline 22 is selectively connected to adjust the amount of refrigerant in the refrigerant circulation pipeline 10. Specifically, the first valve 24 can determine whether to open instantaneously according to the high pressure condition of the four-pipe system 100, and dynamically adjust the amount of refrigerant required by the refrigerant circulation pipe. For example, for R410a refrigerant, when the high pressure in the four-pipe system 100 is greater than the first preset value, the first valve 24 is opened for a certain period of time and then closed.

[0063] Specifically, when the high pressure in the four-pipe system 100 is greater than 39 MPa, the first valve 24 is opened for 3 or 5 seconds, thereby adjusting the amount of refrigerant circulating in the four-pipe system 100 and reducing the high pressure in the four-pipe system 100, thereby improving the unit energy efficiency of the four-pipe system 100.

[0064] Of course, for different types of refrigerants, the first preset value and the opening time of the first valve 24 are different and can be adjusted appropriately as needed, which will not be elaborated here.

[0065] from Figure 2 It can be determined from the structure shown that when the refrigerant circulation pipeline 10 is in the single hot water making mode, the air outlet of the compressor 11 is connected to the first port 121 of the four-way valve 12, the fourth port 124 of the four-way valve 12 is connected to the inlet of the hot water heat exchanger 19, the outlet of the hot water heat exchanger 19 is connected to the inlet of the second electronic expansion valve 17, the outlet of the second electronic expansion valve 17 is connected to the inlet of the air-cooled heat exchanger 13, the outlet of the air-cooled heat exchanger 13 is connected to the second port 122 of the four-way valve 12, and the third port 123 of the four-way valve 12 is connected to the air inlet of the compressor 11, so that the circulation flow of the refrigerant can be realized.

[0066] In the single hot water production mode, after the refrigerant flows out from the compressor 11, it passes through the first refrigerant pipe 101, the four-way valve 12, the sixth refrigerant pipe 106, the hot water heat exchanger 19, the second electronic expansion valve 17, the air-cooled heat exchanger 13 and the four-way valve 12 and then returns to the compressor 11, realizing the circulation flow of the refrigerant.

[0067] When the refrigerant circulation pipeline 10 is in the separate hot water making mode, the first valve 24 of the refrigerant regulating pipeline 20 is in a selectively connected state. When the first pipeline 22 is in a connected state, one end of the liquid storage component 21 can be connected with the refrigerant circulation pipeline 10, and the excess refrigerant can be transported to the liquid storage component 21. The amount of refrigerant in the refrigerant circulation pipeline 10 can be dynamically adjusted to realize the storage of excess refrigerant.

[0068] In some embodiments of the present invention, Figure 3 As shown, when the refrigerant circulation pipeline 10 is in the simultaneous cooling and heating water mode, the refrigerant circulation pipeline 10 includes a compressor 11, and a four-way valve 12, a hot water heat exchanger 19, a first electronic expansion valve 14 and a cold water heat exchanger 15 are connected in sequence along the exhaust direction of the compressor 11, and the compressor 11, the four-way valve 12, the hot water heat exchanger 19, the first electronic expansion valve 14 and the cold water heat exchanger 15 form a simultaneous cooling and heating flow path; the first pipeline 22 is connected to the outlet end of the cold water heat exchanger 15, and the first valve 24 is in an open state.

[0069] Optionally, a second control valve 18 is provided on the cooling and heating flow path, and two ends of the second control valve 18 are respectively connected to the first electronic expansion valve 14 and the hot water heat exchanger 19. The second control valve 18 can adopt a one-way valve structure to achieve one-way flow of the refrigerant.

[0070] from Figure 3 It can be determined from the structure shown that when the refrigerant circulation pipeline 10 is in the simultaneous cooling and heating mode, the air outlet of the compressor 11 is connected to the first port 121 of the four-way valve 12, the fourth port 124 of the four-way valve 12 is connected to the inlet of the hot water heat exchanger 19, the outlet of the hot water heat exchanger 19 is connected to the inlet of the second control valve 18, the outlet of the second control valve 18 is connected to the inlet of the first electronic expansion valve 14, the outlet of the first electronic expansion valve 14 is connected to the inlet of the cold water heat exchanger 15, and the outlet of the cold water heat exchanger 15 is connected to the air inlet of the compressor 11, thereby realizing the circulation of the refrigerant.

[0071] In the simultaneous cooling and heating mode, after the refrigerant flows out of the compressor 11, it passes through the four-way valve 12, the hot water heat exchanger 19, the second control valve 18, the first electronic expansion valve 14, and the cold water heat exchanger 15 in sequence and then returns to the compressor 11 to realize the circulation flow of the refrigerant.

[0072] It should be noted that in the simultaneous cooling and heating mode, the first pipeline 22 is connected to the outlet end of the cold water heat exchanger 15, and the first valve 24 is in an open state, so that excess refrigerant can be stored inside the liquid storage component 21 until the liquid storage component 21 is completely filled.

[0073] In some embodiments of the utility model, the refrigerant regulating pipeline 20 also includes a second pipeline 23, one end of the second pipeline 23 is connected to the other end of the liquid storage component 21, and the other end of the second pipeline 23 is connected to the refrigerant circulation pipeline 10, and a second valve 25 is provided on the second pipeline 23, wherein the second valve 25 is in a closed state to disconnect the second pipeline 23.

[0074] In some embodiments of the utility model, either the first valve 24 or the second valve 25 is a solenoid valve, or both the first valve 24 and the second valve 25 are solenoid valves, which can realize automatic control of the pipeline. In addition to using solenoid valves, the first valve 24 and the second valve 25 can also use manual control valves and other structures.

[0075] It should be emphasized that Figures 1 to 3 The arrow in the figure indicates the flow direction of the refrigerant. Figures 1 to 3 The parts connected by the dotted lines in the figure represent components that are not involved in the refrigerant circulation path.

[0076] A second aspect of the present invention provides an air conditioner, which includes the four-pipe system 100 as in the above embodiment.

[0077] The air conditioner here can be a heat pump air conditioner or other types of air conditioning systems.

[0078] For the structures of other parts of the utility model, please refer to the prior art, and this application will not elaborate on them here.

[0079] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A four-pipe system, characterized in that: The four-control system includes: Refrigerant circulation piping; and A refrigerant regulating pipeline is connected in parallel with the refrigerant circulation pipeline, and a liquid storage component is provided on the refrigerant regulating pipeline. The liquid storage component can be selectively connected with the refrigerant circulation pipeline and regulate the amount of refrigerant in the refrigerant circulation pipeline.

2. The four-pipe system according to claim 1, characterized in that: The refrigerant regulating pipeline includes a first pipeline, two ends of which are respectively connected to the refrigerant circulation pipeline and one end of the liquid storage component, wherein a first valve is arranged on the first pipeline.

3. The four-pipe system according to claim 2, characterized in that: The refrigerant circulation pipeline includes a compressor, a four-way valve and a heat exchange component connected in sequence through the pipeline. The first pipeline is connected to the heat exchange component.

4. The four-pipe system according to claim 3, characterized in that: The refrigerant circulation pipeline also includes a first electronic expansion valve; The heat exchange assembly includes an air-cooled heat exchanger and a cold water heat exchanger, and the four-way valve, the air-cooled heat exchanger, the first electronic expansion valve and the cold water heat exchanger are sequentially connected along the exhaust direction of the compressor, and the compressor, the four-way valve, the air-cooled heat exchanger, the first electronic expansion valve and the cold water heat exchanger form a refrigeration circulation path; The first pipeline is in communication with a suction side of the compressor.

5. The four-pipe system according to claim 4, characterized in that: A first control valve is provided on the refrigeration flow path, and two ends of the first control valve are respectively connected to the air-cooled heat exchanger and the first electronic expansion valve.

6. The four-pipe system according to claim 3, characterized in that: The refrigerant circulation pipeline also includes a second electronic expansion valve; The heat exchange assembly includes an air-cooled heat exchanger and a hot water heat exchanger, and the four-way valve, the hot water heat exchanger, the second electronic expansion valve and the air-cooled heat exchanger are sequentially connected along the exhaust direction of the compressor, and the compressor, the four-way valve, the hot water heat exchanger, the second electronic expansion valve and the air-cooled heat exchanger form a heating flow path; The first pipeline is connected to the inlet end of the second electronic expansion valve, and a first valve is provided on the first pipeline. The first pipeline is selectively connected to adjust the amount of refrigerant in the refrigerant circulation pipeline.

7. The four-pipe system according to claim 3, characterized in that: The refrigerant circulation pipeline also includes a first electronic expansion valve; The heat exchange assembly includes an air-cooled heat exchanger, a hot water heat exchanger and a cold water heat exchanger, and the four-way valve, the hot water heat exchanger, the first electronic expansion valve and the cold water heat exchanger are sequentially connected along the exhaust direction of the compressor, and the compressor, the four-way valve, the hot water heat exchanger, the first electronic expansion valve and the cold water heat exchanger form a simultaneous cooling and heating flow path; The first pipeline is in communication with an outlet end of the cold water heat exchanger.

8. The four-pipe system according to claim 7, characterized in that: A second control valve is provided on the simultaneous cooling and heating flow path, and two ends of the second control valve are respectively connected to the first electronic expansion valve and the hot water heat exchanger.

9. The four-pipe system according to claim 2, characterized in that: The refrigerant regulating pipeline also includes a second pipeline, the two ends of which are respectively connected to the other end of the liquid storage component and the refrigerant circulation pipeline, and a second valve is arranged on the second pipeline.

10. The four-pipe system according to claim 9, characterized in that: At least one of the first valve and the second valve is a solenoid valve.

11. An air conditioner, characterized in that: The air conditioner comprises a four-pipe system according to any one of claims 1 to 10.

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