Multi-split heat recovery multi-split air conditioning system

Abstract

The invention relates to the technical field of household appliances, in particular to a multi-split heat recovery multi-split air conditioning system which comprises an air conditioning system, a hot water system, an adjusting unit and a controller, the air conditioning system, the hot water system and the adjusting unit are connected with one another, and the controller responds to a control instruction and controls the multi-split heat recovery multi-split air conditioning system to operate in different working modes. The working modes of the multi-split heat recovery multi-split air conditioning system can be enriched, and the intelligence is improved; meanwhile, the controller controls the state of each component in the adjusting unit in different working modes, so that the on-off state between the refrigerant circulation loop and the water tank branch and the on-off state between the outdoor heat exchanger and the indoor heat exchanger group in the refrigerant circulation loop are adjusted; therefore, the refrigerant which does not participate in heat exchange in the refrigerant circulation loop and / or the water tank branch flows back to the compressor based on the pressure difference between the flow path where the refrigerant is located and the inlet of the compressor, refrigerant retention can be avoided, the refrigerant amount during operation of the air conditioning system is ensured, and the refrigerating efficiency of the air conditioning system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a one-to-many heat recovery multi-split air-conditioning system. Background Art

[0002] Multi-split central air conditioning is a type of user central air conditioning, commonly known as "one to many", which refers to a primary refrigerant air conditioning system in which one outdoor unit is connected to two or more indoor units through piping, with air-cooled heat exchange on the outdoor side and direct evaporation heat exchange on the indoor side.

[0003] An existing multi-split system operates in water heater heating mode, combining the compressor's exhaust temperature to control the on / off of the electric heating element, and utilizing the excess waste heat of the air conditioning system to heat the water heater, which can save energy and improve energy efficiency. However, when the system only has air conditioning demand but no hot water demand, a portion of the refrigerant will be retained in the water heater heat exchanger branch, which may result in an insufficient amount of refrigerant in the actual operating system, resulting in performance failing to meet the design performance. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, the purpose of the present invention is to propose a one-to-many heat recovery multi-split air-conditioning system, which can operate in different working modes; at the same time, the refrigerant that does not participate in heat exchange in the refrigerant circulation loop and / or the water tank branch can flow back to the compressor based on the pressure difference between the flow path and the inlet of the compressor, thereby avoiding refrigerant retention and ensuring the refrigerant quantity during the operation of the air-conditioning system, thereby helping to improve the cooling efficiency of the air-conditioning system.

[0006] The embodiment of the present invention proposes a one-to-many heat recovery multi-split air-conditioning system, which includes: an air-conditioning system, the air-conditioning system includes: a refrigerant circulation loop, so that the refrigerant performs a refrigeration cycle in a loop composed of a compressor, an outdoor heat exchanger, an outdoor expansion valve, an expansion valve group, an indoor heat exchanger group, a stop valve group, and a four-way valve, wherein the indoor heat exchanger group includes a plurality of indoor heat exchangers connected in parallel; a hot water system connected to the air-conditioning system, the hot water system includes: a water tank; a water tank heat exchanger, which is arranged in the water tank; a water The water tank branch, the water tank heat exchanger is connected to the refrigerant circulation loop through the water tank branch, and the water tank branch includes: a first water tank branch and a second water tank branch; wherein, one end of the first water tank branch is connected to the outlet of the compressor, the other end of the first water tank branch is connected to one end of the water tank heat exchanger, one end of the second water tank branch is connected to the other end of the water tank heat exchanger, and the other end of the second water tank branch is connected to one end of the expansion valve group and one end of the outdoor expansion valve; when the water tank heat exchanger is used as a condenser, the refrigerant The refrigerant in the circulation loop can flow through the water tank heat exchanger through the water tank branch to perform heat exchange, so that the water tank heat exchanger heats the water in the water tank; a regulating unit is connected to the refrigerant circulation loop and the water tank branch, respectively, and is used to regulate the on-off state between the refrigerant circulation loop and the water tank branch, and regulate the on-off state between the outdoor heat exchanger and the indoor heat exchanger group in the refrigerant circulation loop; a controller is connected to the air-conditioning system and the regulating unit, respectively, and is configured to: in response to a control instruction, control the one-to-many heat recovery multi-split air-conditioning system to operate in different working modes, and control the states of each component in the regulating unit in different working modes, thereby regulating the on-off state between the refrigerant circulation loop and the water tank branch, and regulating the on-off state between the outdoor heat exchanger and the indoor heat exchanger group in the refrigerant circulation loop, so that the refrigerant in the refrigerant circulation loop and / or the water tank branch that does not participate in heat exchange flows back to the compressor based on the pressure difference between the flow path and the inlet of the compressor.

[0007] The above technical solution has the following advantages or beneficial effects: the one-to-many heat recovery multi-split air-conditioning system provided according to an embodiment of the present invention includes an interconnected air-conditioning system, a hot water system and a regulating unit, and a controller. The hot water system can be used as a condenser. The controller responds to control instructions to control the one-to-many heat recovery multi-split air-conditioning system to operate in different working modes, thereby enriching the working modes of the one-to-many heat recovery multi-split air-conditioning system and improving intelligence; at the same time, the controller controls the status of each component in the regulating unit under different working modes, and then adjusts the on-off state between the refrigerant circulation loop and the water tank branch, as well as the on-off state between the outdoor heat exchanger and the indoor heat exchanger group in the refrigerant circulation loop, so that the refrigerant that does not participate in heat exchange in the refrigerant circulation loop and / or the water tank branch flows back to the compressor based on the pressure difference between the flow path and the inlet of the compressor, thereby avoiding refrigerant retention and ensuring the refrigerant quantity when the air-conditioning system is in operation, thereby helping to improve the cooling efficiency of the air-conditioning system.

[0008] In addition, the one-to-many heat recovery multi-split air conditioning system according to the embodiment of the present invention may also have the following additional technical features:

[0009] Furthermore, the first interface of the four-way valve is connected to the outlet of the compressor, the second interface of the four-way valve is connected to the outdoor heat exchanger, the third interface of the four-way valve is connected to the indoor heat exchanger group, and the fourth interface of the four-way valve is connected to the inlet of the compressor; the expansion valve group includes: a plurality of first expansion valves connected in parallel, one end of each of the first expansion valves is connected to one end of the outdoor expansion valve, and the other end of each of the first expansion valves is connected to one end of the corresponding indoor heat exchanger; the stop valve group includes: a plurality of first stop valves connected in parallel, one end of each of the first stop valves is connected to the third interface, and the other end of each of the first stop valves is connected to the other end of the corresponding indoor heat exchanger; a plurality of second stop valves connected in parallel, one end of each of the second stop valves is connected to one end of the corresponding indoor heat exchanger, and the other end of each of the second stop valves is connected to the other end of the corresponding first expansion valve.

[0010] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided in an embodiment of the present invention, the refrigerant flow rate flowing into or out of the indoor heat exchanger group can be adjusted through the expansion valve group, and the inflow on-off state and outflow on-off state of the indoor heat exchanger group can be controlled through the shut-off valve group, thereby facilitating the control of the one-to-many heat recovery multi-split air-conditioning system.

[0011] Furthermore, the regulating unit includes: a first switch component, one end of the first switch component is connected to the outlet of the compressor, the other end of the first switch component is connected to the first interface, and the first switch component is used to control the on-off state between the outlet of the compressor and the refrigerant circulation loop; a second switch component is arranged on the first water tank branch, one end of the second switch component is connected to the outlet of the compressor, the other end of the second switch component is connected to one end of the water tank heat exchanger, and the second switch component is used to control the on-off state between the first water tank branch and the refrigerant circulation loop; a first throttling control component, one end of the first throttling control component is connected to the first water tank branch, the other end of the first throttling control component is connected to the inlet of the compressor and the fourth interface, the first throttling control component is used to make the refrigerant in the water tank branch flow back or not flow back to the compressor through its own on-off state; a second throttling control component, one end of the second throttling control component is connected to the inlet of the compressor and the fourth interface The first end is connected to the refrigerant circulation loop, the other end of the second throttling control component is connected to the inlet of the compressor and the fourth interface, and the second throttling control component is used to make the refrigerant in the outdoor heat exchanger and / or the indoor heat exchanger group return or not return to the compressor through its own on-off state; a quantity regulating component is arranged on the second water tank path, one end of the flow regulating component is connected to the other end of the water tank heat exchanger, and the other end of the flow regulating component is connected to one end of the expansion valve group and one end of the outdoor expansion valve, and the flow regulating component is used to regulate the refrigerant flow out of the water tank heat exchanger; a third switch component, one end of the third switch component is connected to one end of the outdoor expansion valve, and the other end of the third switch component is connected to one end of the expansion valve group and one end of the flow regulating component, and the third switch component is used to control the on-off state between the indoor heat exchanger group and the outdoor heat exchanger, as well as to control the on-off state between the second water tank branch and the outdoor heat exchanger.

[0012] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by the embodiment of the present invention, through the cooperation of the first switch component, the second switch component, the first throttling control component, the second throttling control component, the flow regulating component and the third switch component, the regulating unit can adjust the on-off state between the refrigerant circulation loop and the water tank branch, and adjust the on-off state between the outdoor heat exchanger and the indoor heat exchanger group in the refrigerant circulation loop, thereby facilitating the control of the one-to-many heat recovery multi-split air-conditioning system.

[0013] Furthermore, the first switch assembly includes: a gas stop valve, one end of the gas stop valve is connected to the outlet of the compressor, and the other end of the gas stop valve is connected to the first interface.

[0014] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by an embodiment of the present invention, the first switch component includes a gas shut-off valve, which can control the on-off state between the compressor outlet and the refrigerant circulation loop.

[0015] Furthermore, the second switch assembly includes: a first solenoid valve and a third stop valve connected in series on the first water tank branch, wherein one end of the first solenoid valve is connected to the outlet of the compressor, the other end of the first solenoid valve is connected to one end of the third stop valve, and the other end of the third stop valve is connected to one end of the water tank heat exchanger.

[0016] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by an embodiment of the present invention, the second switch assembly includes a first solenoid valve and a third stop valve, and the first solenoid valve and the third stop valve can control the on-off state between the first water tank branch and the refrigerant circulation circuit.

[0017] Furthermore, the first throttling control component includes: a first capillary tube and a second solenoid valve connected in series, wherein one end of the first capillary tube is connected to the first water tank branch, the other end of the first capillary tube is connected to one end of the second solenoid valve, and the other end of the second solenoid valve is connected to the inlet of the compressor and the fourth interface.

[0018] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by an embodiment of the present invention, the first throttling control component includes a first capillary tube and a second solenoid valve, through which the refrigerant in the water tank branch can be refluxed or not refluxed to the compressor.

[0019] Furthermore, the second throttling control component includes: a second capillary and a third solenoid valve connected in series, wherein one end of the second capillary is connected to the other end of the gas shut-off valve and the first interface, the other end of the second capillary is connected to one end of the third solenoid valve, and the other end of the third solenoid valve is connected to the inlet of the compressor and the fourth interface.

[0020] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided in an embodiment of the present invention, the second throttling control component includes a second capillary tube and a third solenoid valve, through which the refrigerant in the outdoor heat exchanger and / or the indoor heat exchanger group can be refluxed or not refluxed to the compressor.

[0021] Furthermore, the flow regulating component includes: a second expansion valve and a fourth stop valve connected in series on the second water tank branch, wherein one end of the fourth stop valve is connected to the other end of the water tank heat exchanger, the other end of the fourth stop valve is connected to one end of the second expansion valve, and the other end of the second expansion valve is connected to one end of the expansion valve group and one end of the outdoor expansion valve.

[0022] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by an embodiment of the present invention, the flow regulating component includes a second expansion valve and a fourth stop valve, and the refrigerant flow out of the water tank heat exchanger can be adjusted through the second expansion valve and the fourth stop valve.

[0023] Furthermore, the third switch assembly includes: a liquid stop valve, one end of the liquid stop valve is connected to one end of the outdoor expansion valve, and the other end of the liquid stop valve is connected to one end of the expansion valve group and one end of the flow regulating assembly.

[0024] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by an embodiment of the present invention, the third switch assembly includes a liquid stop valve, which can control the open-end state between the second water tank branch and the outdoor heat exchanger.

[0025] Furthermore, the working mode includes a cooling mode; when responding to a control instruction, the controller controls the one-to-many heat recovery multi-split air-conditioning system to operate in the cooling mode, and is configured to: control the first interface and the second interface of the four-way valve to be connected, and control the third interface and the fourth interface of the four-way valve to be connected; control the outdoor expansion valve to be fully opened; control multiple first expansion valves to be opened; control the gas stop valve to be fully opened; control the first solenoid valve to be closed; control the liquid stop valve to be fully opened; control the second expansion valve to be closed; control the second solenoid valve to be opened; and control the third solenoid valve to be closed.

[0026] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by an embodiment of the present invention, when responding to a control instruction and controlling the one-to-many heat recovery multi-split air-conditioning system to operate in a cooling mode, the controller controls the corresponding valve to open so that the refrigerant flows through the outdoor heat exchanger and multiple indoor heat exchangers in sequence, and the refrigerant in the water tank branch that does not participate in heat exchange is returned to the compressor based on the pressure difference between the flow path and the inlet of the compressor, thereby avoiding refrigerant retention and ensuring the refrigerant quantity during the operation of the air-conditioning system, thereby helping to improve the cooling efficiency of the air-conditioning system.

[0027] Furthermore, the working mode includes a heating mode; when responding to a control instruction, the controller controls the one-to-many heat recovery multi-split air-conditioning system to operate in a heating mode, and is configured to: control the first interface and the third interface of the four-way valve to be connected, and control the second interface and the fourth interface of the four-way valve to be connected; control the outdoor expansion valve to open; control multiple first expansion valves to open; control the gas stop valve to be fully opened; control the first solenoid valve to be closed; control the liquid stop valve to be fully opened; control the second expansion valve to be closed; control the second solenoid valve to be open; and control the third solenoid valve to be closed.

[0028] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by an embodiment of the present invention, when responding to a control instruction and controlling the one-to-many heat recovery multi-split air-conditioning system to operate in a heating mode, the controller controls the corresponding valve to open so that the refrigerant flows through multiple indoor heat exchangers and outdoor heat exchangers in sequence, and the refrigerant in the water tank branch that does not participate in heat exchange is returned to the compressor based on the pressure difference between the flow path and the inlet of the compressor, thereby avoiding refrigerant retention and ensuring the refrigerant quantity during the operation of the air-conditioning system, thereby helping to improve the cooling efficiency of the air-conditioning system.

[0029] Furthermore, the working mode includes a water tank separate heating mode; when responding to a control instruction, the controller controls the one-to-many heat recovery multi-split air-conditioning system to operate in a water tank separate heating mode, and is configured to: control the first interface and the third interface of the four-way valve to be connected, and control the second interface and the fourth interface of the four-way valve to be connected; control the outdoor expansion valve to open; control multiple first expansion valves to close; control the gas stop valve to close; control the first solenoid valve to be fully open; control the liquid stop valve to be fully open; control the second expansion valve to be fully open; control the second solenoid valve to be closed; and control the third solenoid valve to open.

[0030] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by an embodiment of the present invention, when responding to a control instruction and controlling the one-to-many heat recovery multi-split air-conditioning system to operate in a water tank separate heating mode, the controller controls the corresponding valve to open so that the refrigerant flows through the water tank heat exchanger and the outdoor heat exchanger in sequence, and the refrigerant that does not participate in the heat exchange in the refrigerant circulation loop is returned to the compressor based on the pressure difference between the flow path and the inlet of the compressor, thereby avoiding refrigerant retention and ensuring the refrigerant quantity during the operation of the air-conditioning system, thereby helping to improve the cooling efficiency of the air-conditioning system.

[0031] Furthermore, the working mode includes a first cooling and water tank heating mode; when responding to a control instruction, the controller controls the one-to-many heat recovery multi-split air-conditioning system to operate in the first cooling and water tank heating mode, and is configured to: control the first interface and the second interface of the four-way valve to be connected, and control the third interface and the fourth interface of the four-way valve to be connected; control the outdoor expansion valve to be fully open; control multiple first expansion valves to be open; control the gas stop valve to be fully open; control the first solenoid valve to be fully open; control the liquid stop valve to be fully open; control the second expansion valve to be fully open; control the second solenoid valve to be closed; and control the third solenoid valve to be closed.

[0032] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by the embodiment of the present invention, when responding to the control instruction, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate the first cooling and water tank heating mode, the controller controls the corresponding valves to open so that the refrigerant flows through the outdoor heat exchanger, the water tank heat exchanger and multiple indoor heat exchangers in sequence, and uses the heat generated during the operation of the air conditioner to heat the water, organically combining the cooling and hot water functions, which helps to improve energy utilization efficiency.

[0033] Furthermore, the working mode includes a second cooling and water tank heating mode; when responding to a control instruction, the controller controls the one-to-many heat recovery multi-split air-conditioning system to operate in the second cooling and water tank heating mode, and is configured to: control the first interface and the second interface of the four-way valve to be connected, and control the third interface and the fourth interface of the four-way valve to be connected; control the outdoor expansion valve to be closed; control multiple first expansion valves to be opened; control the gas stop valve to be closed; control the first solenoid valve to be fully opened; control the liquid stop valve to be closed; control the second expansion valve to be fully opened; control the second solenoid valve to be closed; and control the third solenoid valve to be open.

[0034] The above technical solution has the following advantages or beneficial effects: according to the one-to-many heat recovery multi-split air-conditioning system provided by the embodiment of the present invention, when responding to the control instruction, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate the second cooling and water tank heating mode, the controller controls the corresponding valve to open, so that the refrigerant flows through the water tank heat exchanger and multiple indoor heat exchangers in sequence, and uses the heat generated during the operation of the air conditioner to heat the water, organically combining the cooling and hot water functions, which helps to improve energy utilization efficiency, and the refrigerant that does not participate in heat exchange in the refrigerant circulation loop is returned to the compressor based on the pressure difference between the flow path and the inlet of the compressor, so as to avoid refrigerant retention and ensure the refrigerant quantity when the air-conditioning system is in operation, thereby helping to improve the cooling efficiency of the air-conditioning system.

[0035] Furthermore, the working mode includes heating and water tank heating modes; when responding to a control instruction, the controller controls the one-to-many heat recovery multi-split air-conditioning system to operate in heating and water tank heating modes, and controls the second interface and the fourth interface of the four-way valve to be connected; controls the outdoor expansion valve to open; controls multiple first expansion valves to open; controls the gas stop valve to be fully opened; controls the first solenoid valve to be fully opened; controls the liquid stop valve to be fully opened; controls the second expansion valve to be opened; controls the second solenoid valve to be closed; controls the third solenoid valve to be closed.

[0036] The above technical solution has the following advantages or beneficial effects: According to the one-to-many heat recovery multi-split air-conditioning system provided by the embodiment of the present invention, when responding to the control instruction, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate in heating and water tank heating modes. The controller controls the corresponding valves to open so that the refrigerant flows through multiple indoor heat exchangers, water tank heat exchangers and outdoor heat exchangers in sequence, and uses the heat generated during the operation of the air conditioner to heat the water, organically combining the heating and hot water functions, which helps to improve energy utilization efficiency.

[0037] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0039] Figure 1 2. It is a structural diagram of a one-to-many heat recovery multi-split air conditioning system according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the specific structure of a one-to-many heat recovery multi-split air conditioning system according to an embodiment of the present invention;

[0041] Figure 3 is a schematic structural diagram of a hot water system according to an embodiment of the present invention;

[0042] Figure 4 is a schematic diagram of the hardware structure of a controller according to a specific embodiment of the present invention;

[0043] Figure 5 is a structural diagram of an air conditioning system according to a specific embodiment of the present invention;

[0044] Figure 6 is a structural diagram of a refrigeration system of an air-conditioning system according to a specific embodiment of the present invention;

[0045] Figure 7 is a schematic structural diagram of an adjustment unit according to an embodiment of the present invention;

[0046] Figure 8 is a schematic diagram of refrigerant flow in a cooling mode according to an embodiment of the present invention;

[0047] Figure 9 is a schematic diagram of refrigerant flow in a heating mode according to an embodiment of the present invention;

[0048] Figure 10 is a schematic diagram of refrigerant flow in a water tank heating mode according to an embodiment of the present invention;

[0049] Figure 11 is a schematic diagram of refrigerant flow in a first cooling and water tank heating mode according to an embodiment of the present invention;

[0050] Figure 12 is a schematic diagram of refrigerant flow in a second cooling and water tank heating mode according to an embodiment of the present invention;

[0051] Figure 13 is a schematic diagram of refrigerant flow in heating and water tank heating modes according to one embodiment of the present invention;

[0052] Figure 14 1 is a schematic structural diagram of a hot water system according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0055] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0056] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0057] Reference below Figures 1-14 A one-to-many heat recovery multi-split air conditioning system according to an embodiment of the present invention is described.

[0058] Figure 1 Schematic diagram of a one-to-many heat recovery multi-split air conditioning system according to an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a one-to-many heat recovery multi-split air conditioning system 100, including: an air conditioning system 110, a hot water system 120, a regulating unit 130 and a controller 71.

[0059] Figure 2 1 is a schematic diagram of the specific structure of a one-to-many heat recovery multi-split air conditioning system according to an embodiment of the present invention. Figure 2 As shown, in one embodiment of the present invention, the air-conditioning system 110 includes: a refrigerant circulation loop, so that the refrigerant performs a refrigeration cycle in a loop composed of a compressor 1, an outdoor heat exchanger 2, an outdoor expansion valve 3, an expansion valve group, an indoor heat exchanger group, a stop valve group, and a four-way valve 4, wherein the indoor heat exchanger group includes a plurality of indoor heat exchangers 5 connected in parallel.

[0060] In a specific embodiment, the air conditioning system 110 is a one-to-many air conditioning system. The air conditioning system 110 includes a refrigerant circulation circuit. The refrigerant circulation circuit allows the refrigerant to refrigerate in a circuit consisting of a compressor 1, an outdoor heat exchanger 2, an outdoor expansion valve 3, an expansion valve group, an indoor heat exchanger group, a stop valve group, and a four-way valve 4. The indoor heat exchanger group includes a plurality of indoor heat exchangers 5 connected in parallel. The number of indoor heat exchanger groups corresponds to the number of expansion valve groups, indoor heat exchanger groups, and stop valve groups. For example, Figure 2 The middle indoor heat exchanger group includes three indoor heat exchangers connected in parallel.

[0061] Figure 3FIG. 1 is a schematic diagram of a hot water system according to an embodiment of the present invention. Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the hot water system 120 is connected to the air-conditioning system 110, and the hot water system 120 includes: a water tank 20; a water tank heat exchanger 21, which is arranged in the water tank 20; a water tank branch, the water tank heat exchanger 21 is connected to the refrigerant circulation loop through the water tank branch, and the water tank branch includes: a first water tank branch and a second water tank branch; wherein, one end of the first water tank branch is connected to the outlet of the compressor 1, the other end of the first water tank branch is connected to one end of the water tank heat exchanger 21, one end of the second water tank branch is connected to the other end of the water tank heat exchanger 21, and the other end of the second water tank branch is connected to one end of the expansion valve group and one end of the outdoor expansion valve 3; when the water tank heat exchanger 21 is used as a condenser, the refrigerant in the refrigerant circulation loop can flow through the water tank heat exchanger 21 through the water tank branch for heat exchange, so that the water tank heat exchanger 21 heats the water in the water tank 20.

[0062] In a specific embodiment, the hot water system 120 includes a water tank 20 and a water tank heat exchanger 21 arranged on the water tank 20. The water tank heat exchanger 21 is, for example, wrapped around the water tank 20. The water tank heat exchanger 21 is connected to the refrigerant circulation loop through a water tank branch. The water tank branch includes a first water tank branch and a second water tank branch. The two ends of the first water tank branch are respectively connected to the outlet of the compressor 1 and the inlet of the water tank heat exchanger 21. The two ends of the second water tank branch are respectively connected to the outlet of the water tank heat exchanger 21 and the expansion valve group and the outdoor expansion valve 3.

[0063] In a specific embodiment, the water tank heat exchanger 21 can be used as a condenser, and the refrigerant in the refrigerant circulation loop flows through the water tank heat exchanger 21 through the water tank branch for heat exchange, so that the water tank heat exchanger 21 heats the water in the water tank 20.

[0064] In one embodiment of the present invention, the regulating unit 130 is connected to the refrigerant circulation loop and the water tank branch, respectively. The regulating unit 130 is used to adjust the on-off state between the refrigerant circulation loop and the water tank branch, and to adjust the on-off state between the outdoor heat exchanger 2 and the indoor heat exchanger group in the refrigerant circulation loop.

[0065] In a specific embodiment, the regulating unit 130 includes, for example, multiple solenoid valves, and the regulating unit 130 can adjust the on-off state between the refrigerant circulation loop and the water tank branch, as well as adjust the on-off state between the outdoor heat exchanger 2 and the indoor heat exchanger group in the refrigerant circulation loop.

[0066] In one embodiment of the present invention, the controller 71 is connected to the air-conditioning system 110 and the regulating unit 130, respectively. The controller 71 is configured to: respond to control instructions, control the one-to-many heat recovery multi-split air-conditioning system 100 to operate in different working modes, and in different working modes, control the status of each component in the regulating unit 130, thereby adjusting the on-off state between the refrigerant circulation loop and the water tank branch, and adjusting the on-off state between the outdoor heat exchanger 2 and the indoor heat exchanger group in the refrigerant circulation loop, so that the refrigerant that does not participate in heat exchange in the refrigerant circulation loop and / or the water tank branch flows back to the compressor 1 based on the pressure difference between the flow path and the inlet of the compressor 1.

[0067] In a specific embodiment, the operator can send control instructions through the terminal to enable the controller 71 to control the one-to-many heat recovery multi-split air-conditioning system 100 to operate in different working modes, wherein the working modes include, for example: cooling mode, heating mode, water tank separate heating mode, first cooling and water tank heating mode, second cooling and water tank heating mode, heating and water tank heating mode, and one of the modes, and the heat recovery amount in the first cooling and water tank heating mode is lower than the heat recovery amount in the second cooling and water tank heating mode, that is, the first cooling and water tank heating mode is an incomplete heat recovery mode, with lower thermal efficiency but more energy-saving, and the second cooling and water tank heating mode is a complete heat recovery mode, with higher thermal efficiency but no energy-saving.

[0068] In a specific embodiment, the controller 71 controls the status of each component in the regulating unit 130 in different working modes, thereby adjusting the on-off status between the refrigerant circulation loop and the water tank branch, and adjusting the on-off status between the outdoor heat exchanger 2 and the indoor heat exchanger group in the refrigerant circulation loop, so that the refrigerant that does not participate in heat exchange in the refrigerant circulation loop and / or the water tank branch flows back to the compressor 1 based on the pressure difference between the flow path and the inlet of the compressor 1, thereby avoiding refrigerant retention and ensuring the refrigerant quantity during the operation of the air-conditioning system 110, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0069] Specifically, a one-to-many heat recovery multi-split air-conditioning system 100 provided according to an embodiment of the present invention includes an interconnected air-conditioning system 110, a hot water system 120, a regulating unit 130, and a controller 71. The hot water system 120 can be used as a condenser. The controller 71 controls the one-to-many heat recovery multi-split air-conditioning system 100 to operate in different operating modes in response to control instructions, thereby enriching the operating modes of the one-to-many heat recovery multi-split air-conditioning system 100 and improving intelligence. At the same time, the controller 71 controls the status of each component in the regulating unit 130 in different operating modes, thereby adjusting the on-off state between the refrigerant circulation loop and the water tank branch, and adjusting the on-off state between the outdoor heat exchanger 2 and the indoor heat exchanger group in the refrigerant circulation loop, so that the refrigerant that does not participate in heat exchange in the refrigerant circulation loop and / or the water tank branch flows back to the compressor 1 based on the pressure difference between the flow path and the inlet of the compressor 1. This can avoid refrigerant retention, ensure the refrigerant amount during operation of the air-conditioning system 110, and thus help improve the cooling efficiency of the air-conditioning system 110.

[0070] In a specific embodiment, the controller 71 is a device that can generate an operation control signal based on an instruction opcode and a timing signal, thereby instructing the electrical device 10 to execute the control instruction. For example, in response to a power-on or power-off instruction received from a user, the controller 71 can execute an operation related to the object selected by the power-on or power-off instruction.

[0071] Figure 4 FIG. 1 is a schematic diagram of the hardware structure of a controller according to a specific embodiment of the present invention. Figure 4 As shown, in a specific embodiment of the present invention, the controller 71 includes a processor 83, and optionally, a memory 82 and a communication interface 84 connected to the processor 83. The processor 83, the memory 82 and the communication interface 84 are connected via a bus 81.

[0072] The processor 83 may be a central processing unit (CPU), a general-purpose processor (GP), a network processor (NP), a digital signal processor (DSP), a microprocessor (MCU), a microcontroller (MCU), a programmable logic device (PLD), or any combination thereof. The processor 83 may also be any other device having processing functionality, such as a circuit, a device, or a software module. The processor 83 may also include multiple CPUs, and the processor 83 may be a single-core (singleCPU) processor 83 or a multi-core (multiCPU) processor 83. The processor 83 herein may refer to one or more devices, circuits, or processing cores for processing data (e.g., computer program instructions).

[0073] The memory 82 can be a read-only memory 82 (ROM) or other types of static storage devices that can store static information and instructions, a random access memory 82 (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory 82 (EEPROM), a compact disc read-only memory (CDROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer. The embodiment of the present invention does not impose any restrictions on this. The memory 82 can exist independently or be integrated with the processor 83. Among them, the memory 82 can contain computer program code. The processor 83 is used to execute the computer program code stored in the memory 82, thereby realizing the control method of the electrical device provided in the embodiment of the present invention.

[0074] The communication interface 84 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.). The communication interface 84 can be a module, a circuit, a transceiver or any device that can achieve communication.

[0075] The bus 81 may be a peripheral component interconnect (PCI) bus 81 or an extended industry standard architecture (EISA) bus 81. The bus 81 may be divided into an address bus 81, a data bus 81, a control bus 81, etc. For ease of representation, Figure 4 Only one thick line is used in the figure, but it does not mean that there is only one bus 81 or one type of bus 81.

[0076] Figure 5 FIG. 1 is a schematic diagram of the structure of an air conditioning system according to a specific embodiment of the present invention. Figure 5 As shown, in a specific embodiment of the present invention, the air-conditioning system includes a refrigeration system for exchanging heat with indoor air to meet cooling or heating needs.

[0077] Figure 6 FIG. 1 is a schematic diagram of the structure of the refrigeration system of the air-conditioning system according to a specific embodiment of the present invention. Figure 6 As shown, in a specific embodiment of the present invention, the refrigeration system includes a compressor, a condenser, an electronic expansion valve, and an evaporator. The air conditioning system in this specific embodiment of the present invention utilizes the compressor, condenser, electronic expansion valve, and evaporator to perform a refrigeration cycle of the air conditioning system. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0078] The compressor compresses high-temperature, high-pressure refrigerant gas and discharges the compressed gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0079] The electronic expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant expanded in the electronic expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor.

[0080] The evaporator can achieve a cooling effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. Throughout the entire cycle, the air conditioning system can adjust the temperature of the indoor space.

[0081] The outdoor unit 2 of the air conditioning system refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit 1 of the air conditioning system includes an indoor heat exchanger, and an electronic expansion valve may be provided in the indoor unit 1 or the outdoor unit 2 .

[0082] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioning system functions as a heater in heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioning system functions as a cooler in cooling mode.

[0083] The air conditioning system in the specific embodiment of the present invention includes multiple indoor units 1 and an outdoor unit 2. The indoor units 1 and outdoor units 2 can be configured as an integrated unit or a split unit. The indoor unit 1 can be configured as a wall-mounted unit, a ceiling unit, a duct unit, etc., and the indoor unit 1 is installed at the top or ceiling of the indoor room.

[0084] Reference Figure 6 Taking an indoor hanging machine as an example, an indoor hanging machine is usually installed at a location such as an indoor wall. For another example, an indoor cabinet machine (not shown in the figure) is also a form of the indoor machine 1 .

[0085] Taking a split unit as an example, the air conditioning system includes multiple indoor units 1 and one outdoor unit 2, wherein the outdoor unit 2 is usually set outdoors for heat exchange with the indoor environment.

[0086] In addition, if Figure 6 As shown in the figure, the air conditioning system includes a controller to control the operation of various components within the air conditioning system, thereby enabling the various components to operate and achieve the system's predetermined functions. The air conditioning system also includes a control device 200. For example, the control device 200 is specifically configured as a remote control that communicates with the controller using, for example, infrared or other communication methods. The remote control allows the user to control various aspects of the air conditioning system, enabling interaction between the user and the system.

[0087] The indoor unit 1 of the air-conditioning system in the specific embodiment of the present invention is arranged at the top or upper part of the room. Generally speaking, the installation height of the indoor unit 1 is higher than the user activity area. The indoor unit 1 includes a return air inlet and an air outlet connected to the room. The indoor air passes through the indoor unit 1 in the return air inlet and flows back to the room through the air outlet.

[0088] The refrigerant circulation circuit in this embodiment of the present invention circulates refrigerant through a loop consisting of a compressor, condenser, electronic expansion valve, and evaporator. One of the condenser and evaporator functions as an outdoor heat exchanger, while the other functions as an indoor heat exchanger. The indoor heat exchanger exchanges heat with the air in indoor unit 1, while the outdoor unit 2 heat exchanger exchanges heat with the air in outdoor unit 2, thereby achieving the cooling or heating requirements of the air conditioning system.

[0089] The indoor unit 1 also includes an indoor fan, which is arranged near the return air port or the air outlet of the indoor heat exchanger and is used to deliver the heat-exchanged air into the room. The indoor fan includes multiple gears for changing the outlet air flow speed of the outlet.

[0090] An air guide plate is provided at the position of the air outlet. The air guide plate adjusts the outflow direction of the air flowing through the air outlet by changing the relative rotation angle between the air guide plate and the air outlet, thereby affecting the indoor air temperature stratification.

[0091] In the specific embodiment shown in the present invention, the air conditioning system further includes a controller, which is configured as the controller 71 described in any one of the above embodiments, for example.

[0092] like Figure 2 As shown, in one embodiment of the present invention, the first interface of the four-way valve 4 is connected to the outlet of the compressor 1, the second interface of the four-way valve 4 is connected to the outdoor heat exchanger 2, the third interface of the four-way valve 4 is connected to the indoor heat exchanger group, and the fourth interface of the four-way valve 4 is connected to the inlet of the compressor 1; the expansion valve group includes: a plurality of first expansion valves 6 connected in parallel, one end of each first expansion valve 6 is connected to one end of the outdoor expansion valve 3, and the other end of each first expansion valve 6 is connected to one end of the corresponding indoor heat exchanger 5; the stop valve group includes: a plurality of first stop valves 7 connected in parallel, one end of each first stop valve 7 is connected to the third interface, and the other end of each first stop valve 7 is connected to the other end of the corresponding indoor heat exchanger 5; a plurality of second stop valves 8 connected in parallel, one end of each second stop valve 8 is connected to one end of the corresponding indoor heat exchanger 5, and the other end of each second stop valve 8 is connected to the other end of the corresponding first expansion valve 6.

[0093] In a specific embodiment, the first interface of the four-way valve 4 (ie Figure 2 The upper interface of the four-way valve 4 is connected to the outlet of the compressor 1, and the second interface of the four-way valve 4 (i.e. Figure 2 The right side interface of the four-way valve 4) is connected to the outdoor heat exchanger 2, and the third interface of the four-way valve 4 (i.e. Figure 2 The left side interface of the four-way valve 4) is connected to the indoor heat exchanger group, and the fourth interface of the four-way valve 4 (i.e. Figure 2 The lower interface of the middle four-way valve 4 is connected to the inlet of the compressor 1.

[0094] In a specific embodiment, the expansion valve group includes: a plurality of first expansion valves 6 connected in parallel, and both ends of each first expansion valve 6 are connected to the outdoor expansion valve 3 and the corresponding indoor heat exchanger 5 respectively.

[0095] In a specific embodiment, the stop valve group includes: a plurality of first stop valves 7 connected in parallel with each other and a plurality of second stop valves 8 connected in parallel with each other, the two ends of each first stop valve 7 are respectively connected to the third interface and the corresponding indoor heat exchanger 5, and the two ends of each second stop valve 8 are respectively connected to the corresponding indoor heat exchanger 5 and the corresponding first expansion valve 6.

[0096] Specifically, the one-to-many heat recovery multi-split air-conditioning system 100 provided according to an embodiment of the present invention can adjust the refrigerant flow into or out of the indoor heat exchanger group through the expansion valve group, and control the inflow on-off state and outflow on-off state of the indoor heat exchanger group through the shut-off valve group, thereby facilitating the control of the one-to-many heat recovery multi-split air-conditioning system 100.

[0097] Figure 7 FIG. 1 is a schematic diagram of the structure of an adjustment unit according to an embodiment of the present invention. Figure 7 As shown, in one embodiment of the present invention, the regulating unit 130 includes: a first switch component 131, one end of the first switch component 131 is connected to the outlet of the compressor 1, and the other end of the first switch component 131 is connected to the first interface, and the first switch component 131 is used to control the on-off state between the outlet of the compressor 1 and the refrigerant circulation loop; a second switch component 132, which is arranged on the first water tank branch, one end of the second switch component 132 is connected to the outlet of the compressor 1, and the other end of the second switch component 132 is connected to one end of the water tank heat exchanger 21, and the second switch component 132 is used to control the on-off state between the first water tank branch and the refrigerant circulation loop; a first throttling control component 133, one end of the first throttling control component 133 is connected to the first water tank branch, and the other end of the first throttling control component 133 is connected to the inlet of the compressor 1 and the fourth interface, and the first throttling control component 133 is used to make the refrigerant in the water tank branch flow back or not flow back to the compressor 1 through its own on-off state; a second throttling control component 134, the second throttling control One end of the component 134 is connected to the refrigerant circulation loop, and the other end of the second throttling control component 134 is connected to the inlet of the compressor 1 and the fourth interface. The second throttling control component 134 is used to make the refrigerant in the outdoor heat exchanger 2 and / or the indoor heat exchanger group reflux or not reflux to the compressor 1 through its own on-off state; the flow regulating component 135 is arranged on the road of the second water tank 20, one end of the flow regulating component 135 is connected to the other end of the water tank heat exchanger 21, and the other end of the flow regulating component 135 is connected to the expansion valve One end of the group and one end of the outdoor expansion valve 3, the flow regulating component 135 is used to regulate the refrigerant flow out of the water tank heat exchanger 21; the third switch component 136, one end of the third switch component 136 is connected to one end of the outdoor expansion valve 3, and the other end of the third switch component 136 is connected to one end of the expansion valve group and one end of the flow regulating component 135. The third switch component 136 is used to control the on-off state between the indoor heat exchanger group and the outdoor heat exchanger 2, as well as the on-end state between the second water tank branch and the outdoor heat exchanger 2.

[0098] In a specific embodiment, the first switch component 131 is, for example, Figure 2The gas shut-off valve 9 in the first switch assembly 131 has two ends connected to the outlet of the compressor 1 and the first interface respectively. The first switch assembly 131 is used to control the on-off state between the outlet of the compressor 1 and the refrigerant circulation circuit.

[0099] In a specific embodiment, the second switch component 132 is, for example, Figure 2 The first solenoid valve 10 and the third stop valve 11, the two ends of the second switch component 132 are respectively connected to the outlet of the compressor 1 and the water tank heat exchanger 21, and the second switch component 132 is used to control the on-off state between the first water tank branch and the refrigerant circulation loop.

[0100] In a specific embodiment, the first throttle control component 133 is, for example, Figure 2 The first capillary tube 12 and the second solenoid valve 13, the two ends of the first throttling control component 133 are respectively connected to the first water tank branch and the inlet and the fourth interface of the compressor 1. The first throttling control component 133 is used to make the refrigerant in the water tank branch flow back or not flow back to the compressor 1 through its own on-off state.

[0101] In a specific embodiment, the second throttle control component 134 is, for example, Figure 2 The second capillary tube 14 and the third solenoid valve 15 in the device, the two ends of the second throttling control component 134 are respectively connected to the refrigerant circulation loop and the inlet and the fourth interface of the compressor 1. The second throttling control component 134 is used to make the refrigerant in the outdoor heat exchanger 2 and / or the indoor heat exchanger group return or not return to the compressor 1 through its own on-off state.

[0102] In a specific embodiment, the flow regulating component 135 is, for example, Figure 2 The second expansion valve 16 and the fourth stop valve 17, the two ends of the flow regulating component 135 are respectively connected to the water tank heat exchanger 21 and the expansion valve group and the outdoor expansion valve 3, and the flow regulating component 135 is used to regulate the refrigerant flow out of the water tank heat exchanger 21.

[0103] In a specific embodiment, the third switch component 136 is, for example, Figure 2 The liquid stop valve 18 in the third switch assembly 136 has its two ends respectively connected to the outdoor expansion valve 3 and the expansion valve group and the flow regulating assembly 135. The third switch assembly 136 is used to control the on-off state between the indoor heat exchanger group and the outdoor heat exchanger 2, as well as to control the on-end state between the second water tank branch and the outdoor heat exchanger 2.

[0104] Specifically, the one-to-many heat recovery multi-split air-conditioning system 100 provided according to an embodiment of the present invention, through the cooperation of the first switch component 131, the second switch component 132, the first throttling control component 133, the second throttling control component 134, the flow regulating component 135 and the third switch component 136, enables the regulating unit 130 to adjust the on-off state between the refrigerant circulation loop and the water tank branch, and adjust the on-off state between the outdoor heat exchanger 2 and the indoor heat exchanger group in the refrigerant circulation loop, thereby facilitating the control of the one-to-many heat recovery multi-split air-conditioning system 100.

[0105] like Figure 2 As shown, in one embodiment of the present invention, the first switch assembly 131 includes: a gas stop valve 9, one end of the gas stop valve 9 is connected to the outlet of the compressor 1, and the other end of the gas stop valve 9 is connected to the first interface.

[0106] In a specific embodiment, the first switch assembly 131 includes Figure 2 The gas stop valve 9 has one end connected to the outlet of the compressor 1 and the other end connected to the first interface.

[0107] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, the first switch component 131 includes a gas shut-off valve 9, which can control the on-off state between the outlet of the compressor 1 and the refrigerant circulation circuit.

[0108] like Figure 2 As shown, in one embodiment of the present invention, the second switch assembly 132 includes: a first solenoid valve 10 and a third stop valve 11 connected in series on the first water tank branch, wherein one end of the first solenoid valve 10 is connected to the outlet of the compressor 1, the other end of the first solenoid valve 10 is connected to one end of the third stop valve 11, and the other end of the third stop valve 11 is connected to one end of the water tank heat exchanger 21.

[0109] In a specific embodiment, the second switch assembly 132 includes Figure 2 The first solenoid valve 10 and the third stop valve 11 are connected in series on the first water tank branch, one end of the first solenoid valve 10 is connected to the outlet of the compressor 1, the other end of the first solenoid valve 10 is connected to one end of the third stop valve 11, and the other end of the third stop valve 11 is connected to one end of the water tank heat exchanger 21.

[0110] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, the second switch component 132 includes a first solenoid valve 10 and a third stop valve 11, and the first solenoid valve 10 and the third stop valve 11 can control the on-off state between the first water tank branch and the refrigerant circulation loop.

[0111] like Figure 2 As shown, in one embodiment of the present invention, the first throttling control component 133 includes: a first capillary tube 12 and a second solenoid valve 13 connected in series, wherein one end of the first capillary tube 12 is connected to the first water tank branch, the other end of the first capillary tube 12 is connected to one end of the second solenoid valve 13, and the other end of the second solenoid valve 13 is connected to the inlet of the compressor 1 and the fourth interface.

[0112] In a specific embodiment, the first throttle control assembly 133 includes Figure 2 The first capillary tube 12 and the second solenoid valve 13 are connected in series, one end of the first capillary tube 12 is connected to the first water tank branch, the other end of the first capillary tube 12 is connected to one end of the second solenoid valve 13, and the other end of the second solenoid valve 13 is connected to the inlet of the compressor 1 and the fourth interface.

[0113] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, the first throttling control component 133 includes a first capillary tube 12 and a second solenoid valve 13, through which the refrigerant in the water tank branch can be refluxed or not refluxed to the compressor 1.

[0114] like Figure 2 As shown, in one embodiment of the present invention, the second throttling control component 134 includes: a second capillary 14 and a third solenoid valve 15 connected in series, wherein one end of the second capillary 14 is connected to the other end of the gas shut-off valve 9 and the first interface, the other end of the second capillary 14 is connected to one end of the third solenoid valve 15, and the other end of the third solenoid valve 15 is connected to the inlet of the compressor 1 and the fourth interface.

[0115] In a specific embodiment, the second throttle control assembly 134 includes Figure 2 The second capillary 14 and the third solenoid valve 15 are connected in series, one end of the second capillary 14 is connected to the other end of the gas shut-off valve 9 and the first interface, the other end of the second capillary 14 is connected to one end of the third solenoid valve 15, and the other end of the third solenoid valve 15 is connected to the inlet of the compressor 1 and the fourth interface.

[0116] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, the second throttling control component 134 includes a second capillary tube 14 and a third solenoid valve 15. The second capillary tube 14 and the third solenoid valve 15 can enable the refrigerant in the outdoor heat exchanger 2 and / or the indoor heat exchanger group to flow back or not flow back to the compressor 1.

[0117] like Figure 2As shown, in one embodiment of the present invention, the flow regulating component 135 includes: a second expansion valve 16 and a fourth stop valve 17 connected in series on the second water tank branch, wherein one end of the fourth stop valve 17 is connected to the other end of the water tank heat exchanger 21, the other end of the fourth stop valve 17 is connected to one end of the second expansion valve 16, and the other end of the second expansion valve 16 is connected to one end of the expansion valve group and one end of the outdoor expansion valve 3.

[0118] In a specific embodiment, the flow regulating assembly 135 includes Figure 2 The second expansion valve 16 and the fourth stop valve 17 are connected in series on the second water tank branch, one end of the fourth stop valve 17 is connected to the other end of the water tank heat exchanger 21, the other end of the fourth stop valve 17 is connected to one end of the second expansion valve 16, and the other end of the second expansion valve 16 is connected to one end of the expansion valve group and one end of the outdoor expansion valve 3.

[0119] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, the flow regulating component 135 includes a second expansion valve 16 and a fourth stop valve 17, and the second expansion valve 16 and the fourth stop valve 17 can adjust the refrigerant flow out of the water tank heat exchanger 21.

[0120] like Figure 2 As shown, in one embodiment of the present invention, the third switch assembly 136 includes: a liquid stop valve 18, one end of the liquid stop valve 18 is connected to one end of the outdoor expansion valve 3, and the other end of the liquid stop valve 18 is connected to one end of the expansion valve group and one end of the flow regulating assembly 135.

[0121] In a specific embodiment, the third switch assembly 136 includes Figure 2 The liquid stop valve 18 in the liquid stop valve 18 has its two ends connected to the outdoor expansion valve 3 and the expansion valve group and the flow regulating component 135 respectively.

[0122] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, the third switch component 136 includes a liquid stop valve 18, through which the liquid stop valve 18 can control the open-end state between the second water tank branch and the outdoor heat exchanger 2.

[0123] From the above, we can see that Figure 2 As shown, in the one-to-many heat recovery multi-split air-conditioning system 100 provided according to an embodiment of the present invention, all valve components are centrally configured in the outdoor unit module of the air-conditioning system 110, while the indoor unit module of the air-conditioning system 110 only includes an indoor heat exchanger. The indoor unit can significantly reduce mechanical noise and operating vibration, thereby effectively reducing the indoor noise level.

[0124] Figure 8FIG. 1 is a schematic diagram of the refrigerant flow direction in the cooling mode according to an embodiment of the present invention. Figure 8 As shown, in one embodiment of the present invention, the working mode includes a cooling mode; when responding to a control instruction, the controller 71 is configured to control the one-to-many heat recovery multi-split air-conditioning system 100 to operate in the cooling mode, and the controller 71 is configured to: control the first interface and the second interface of the four-way valve 4 to be connected, and control the third interface and the fourth interface of the four-way valve 4 to be connected; control the outdoor expansion valve 3 to be fully open; control the multiple first expansion valves 6 to be open; control the gas stop valve 9 to be fully open; control the first solenoid valve 10 to be closed; control the liquid stop valve 18 to be fully open; control the second expansion valve 16 to be closed; control the second solenoid valve 13 to be open; and control the third solenoid valve 15 to be closed.

[0125] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in cooling mode, the controller 71 controls the first and second interfaces of the four-way valve 4 to be connected, and controls the third and fourth interfaces of the four-way valve 4 to be connected; controls the outdoor expansion valve 3 to be fully opened; controls multiple first expansion valves 6 to be opened; controls the gas stop valve 9 to be fully opened; controls the first solenoid valve 10 to be closed; controls the liquid stop valve 18 to be fully opened; controls the second expansion valve 16 to be closed; controls the second solenoid valve 13 to be opened; and controls the third solenoid valve 15 to be closed.

[0126] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in cooling mode, after the refrigerant flows out of the compressor 1, it flows through the gas stop valve 9, the four-way valve 4, the outdoor heat exchanger 2, the outdoor expansion valve 3, the liquid stop valve 18, multiple first expansion valves 6, multiple second stop valves 8, multiple indoor heat exchangers 5, multiple first stop valves 7 and the four-way valve 4 in sequence, and then flows into the compressor 1 again, completing the refrigerant cycle.

[0127] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in cooling mode, since the hot water system 120 is not involved, refrigerant is retained in the water tank branch. The refrigerant retained in the water tank branch flows back to the compressor 1 through the first capillary 12 and the second solenoid valve 13 based on the pressure difference between the flow path where it is located and the inlet of the compressor 1. This can avoid refrigerant retention and ensure the refrigerant amount when the air-conditioning system 110 is in operation, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0128] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, when responding to a control instruction and controlling the one-to-many heat recovery multi-split air-conditioning system 100 to operate in a cooling mode, the controller 71 controls the corresponding valves to open so that the refrigerant flows through the outdoor heat exchanger 2 and multiple indoor heat exchangers 5 in sequence, and the refrigerant in the water tank branch that does not participate in heat exchange is returned to the compressor 1 based on the pressure difference between the flow path and the inlet of the compressor 1, thereby avoiding refrigerant retention and ensuring the refrigerant quantity during the operation of the air-conditioning system 110, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0129] Figure 9 FIG. 1 is a schematic diagram of the refrigerant flow in the heating mode according to an embodiment of the present invention. Figure 9 As shown, in one embodiment of the present invention, the working mode includes a heating mode; when responding to a control instruction, the controller 71 is configured to control the one-to-many heat recovery multi-split air-conditioning system 100 to operate in the heating mode, and the controller 71 is configured to: control the first interface and the third interface of the four-way valve 4 to be connected, and control the second interface and the fourth interface of the four-way valve 4 to be connected; control the outdoor expansion valve 3 to be opened; control the multiple first expansion valves 6 to be opened; control the gas stop valve 9 to be fully opened; control the first solenoid valve 10 to be closed; control the liquid stop valve 18 to be fully opened; control the second expansion valve 16 to be closed; control the second solenoid valve 13 to be opened; and control the third solenoid valve 15 to be closed.

[0130] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in heating mode, the controller 71 controls the first and third interfaces of the four-way valve 4 to be connected, and controls the second and fourth interfaces of the four-way valve 4 to be connected; controls the outdoor expansion valve 3 to be opened; controls multiple first expansion valves 6 to be opened; controls the gas stop valve 9 to be fully opened; controls the first solenoid valve 10 to be closed; controls the liquid stop valve 18 to be fully opened; controls the second expansion valve 16 to be closed; controls the second solenoid valve 13 to be opened; and controls the third solenoid valve 15 to be closed.

[0131] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in heating mode, after the refrigerant flows out of the compressor 1, it flows through the gas stop valve 9, the four-way valve 4, multiple first stop valves 7, multiple indoor heat exchangers 5, multiple second stop valves 8, multiple first expansion valves 6, the liquid stop valve 18, the outdoor expansion valve 3, the outdoor heat exchanger 2 and the four-way valve 4 in sequence, and then flows into the compressor 1 again, completing the refrigerant cycle.

[0132] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in heating mode, since the hot water system 120 is not involved, refrigerant is retained in the water tank branch. The refrigerant retained in the water tank branch flows back to the compressor 1 through the first capillary 12 and the second solenoid valve 13 based on the pressure difference between the flow path where it is located and the inlet of the compressor 1. This can avoid refrigerant retention and ensure the refrigerant amount when the air-conditioning system 110 is in operation, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0133] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, when responding to a control instruction and controlling the one-to-many heat recovery multi-split air-conditioning system 100 to operate in a heating mode, the controller 71 controls the corresponding valve to open so that the refrigerant flows through multiple indoor heat exchangers 5 and outdoor heat exchangers 2 in sequence, and the refrigerant in the water tank branch that does not participate in heat exchange is returned to the compressor 1 based on the pressure difference between the flow path and the inlet of the compressor 1, thereby avoiding refrigerant retention and ensuring the refrigerant quantity when the air-conditioning system 110 is in operation, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0134] Figure 10 FIG. 1 is a schematic diagram of the refrigerant flow direction in the water tank heating mode according to an embodiment of the present invention. Figure 10 As shown, in one embodiment of the present invention, the working mode includes a water tank separate heating mode; when responding to a control instruction, the one-to-many heat recovery multi-split air-conditioning system 100 is controlled to operate in a water tank separate heating mode, the controller 71 is configured to: control the first interface and the third interface of the four-way valve 4 to be connected, and control the second interface and the fourth interface of the four-way valve 4 to be connected; control the outdoor expansion valve 3 to be opened; control the multiple first expansion valves 6 to be closed; control the gas stop valve 9 to be closed; control the first solenoid valve 10 to be fully opened; control the liquid stop valve 18 to be fully opened; control the second expansion valve 16 to be fully opened; control the second solenoid valve 13 to be closed; and control the third solenoid valve 15 to be opened.

[0135] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in a water tank separate heating mode, the controller 71 controls the first and third interfaces of the four-way valve 4 to be connected, and controls the second and fourth interfaces of the four-way valve 4 to be connected; controls the outdoor expansion valve 3 to be opened; controls multiple first expansion valves 6 to be closed; controls the gas stop valve 9 to be closed; controls the first solenoid valve 10 to be fully opened; controls the liquid stop valve 18 to be fully opened; controls the second expansion valve 16 to be fully opened; controls the second solenoid valve 13 to be closed; and controls the third solenoid valve 15 to be opened.

[0136] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in a water tank separate heating mode, after the refrigerant flows out of the compressor 1, it flows through the first solenoid valve 10, the third stop valve 11, the water tank heat exchanger 21, the fourth stop valve 17, the second expansion valve 16, the liquid stop valve 18, the outdoor expansion valve 3, the outdoor heat exchanger 2 and the four-way valve 4 in sequence, and then flows into the compressor 1 again, completing the refrigerant cycle.

[0137] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in a water tank separate heating mode, since the multiple indoor heat exchangers 5 are not involved, refrigerant is retained in the refrigerant circulation loop. The refrigerant retained in the refrigerant circulation loop flows back to the compressor 1 through the second capillary 14 and the third solenoid valve 15 based on the pressure difference between the flow path and the inlet of the compressor 1. This can avoid refrigerant retention and ensure the refrigerant quantity when the air-conditioning system 110 is in operation, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0138] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, when responding to a control instruction and controlling the one-to-many heat recovery multi-split air-conditioning system 100 to operate in a water tank separate heating mode, the controller 71 controls the corresponding valve to open so that the refrigerant flows through the water tank heat exchanger 21 and the outdoor heat exchanger 2 in sequence, and the refrigerant that does not participate in the heat exchange in the refrigerant circulation loop is returned to the compressor 1 based on the pressure difference between the flow path and the inlet of the compressor 1, thereby avoiding refrigerant retention and ensuring the refrigerant quantity during the operation of the air-conditioning system 110, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0139] Figure 11 FIG. 1 is a schematic diagram of the refrigerant flow direction in the first cooling and water tank heating mode according to an embodiment of the present invention. Figure 11 As shown, in one embodiment of the present invention, the working mode includes a first cooling and water tank heating mode; when responding to a control instruction, the one-to-many heat recovery multi-split air-conditioning system 100 is controlled to operate in the first cooling and water tank heating mode, the controller 71 is configured to: control the first interface and the second interface of the four-way valve 4 to be connected, and control the third interface and the fourth interface of the four-way valve 4 to be connected; control the outdoor expansion valve 3 to be fully open; control multiple first expansion valves 6 to be open; control the gas stop valve 9 to be fully open; control the first solenoid valve 10 to be fully open; control the liquid stop valve 18 to be fully open; control the second expansion valve 16 to be fully open; control the second solenoid valve 13 to be closed; control the third solenoid valve 15 to be closed.

[0140] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in the first cooling and water tank heating mode, the controller 71 controls the first interface and the second interface of the four-way valve 4 to be connected, and controls the third interface and the fourth interface of the four-way valve 4 to be connected; controls the outdoor expansion valve 3 to be fully opened; controls multiple first expansion valves 6 to be opened; controls the gas stop valve 9 to be fully opened; controls the first solenoid valve 10 to be fully opened; controls the liquid stop valve 18 to be fully opened; controls the second expansion valve 16 to be fully opened; controls the second solenoid valve 13 to be closed; and controls the third solenoid valve 15 to be closed.

[0141] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in the first cooling and water tank heating mode, after the refrigerant flows out of the compressor 1, one path flows through the gas stop valve 9, the four-way valve 4, the outdoor heat exchanger 2, the outdoor expansion valve 3, the liquid stop valve 18, multiple first expansion valves 6, multiple second stop valves 8, multiple indoor heat exchangers 5, multiple first stop valves 7 and the four-way valve 4 in sequence before flowing into the compressor 1 again, and the other path flows through the first solenoid valve 10, the third stop valve 11, the water tank heat exchanger 21, the fourth stop valve 17, the second expansion valve 16, multiple first expansion valves 6, multiple second stop valves 8, multiple indoor heat exchangers 5, multiple first stop valves 7 and the four-way valve 4 in sequence before flowing into the compressor 1 again, completing the refrigerant cycle.

[0142] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, when responding to a control instruction and controlling the one-to-many heat recovery multi-split air-conditioning system 100 to operate in the first cooling and water tank heating mode, the controller 71 controls the corresponding valves to open so that the refrigerant flows through the outdoor heat exchanger 2, the water tank heat exchanger 21 and multiple indoor heat exchangers 5 in sequence, and uses the heat generated during the operation of the air conditioner to heat the water, organically combining the cooling and hot water functions, which helps to improve energy utilization efficiency.

[0143] Figure 12 FIG. 1 is a schematic diagram of the refrigerant flow direction in the second cooling and water tank heating mode according to an embodiment of the present invention. Figure 12 As shown, the working mode includes a second cooling and water tank heating mode; when responding to a control instruction, the one-to-many heat recovery multi-split air-conditioning system 100 is controlled to operate in the second cooling and water tank heating mode, the controller 71 is configured to: control the first interface and the second interface of the four-way valve 4 to be connected, and control the third interface and the fourth interface of the four-way valve 4 to be connected; control the outdoor expansion valve 3 to be closed; control multiple first expansion valves 6 to be opened; control the gas stop valve 9 to be closed; control the first solenoid valve 10 to be fully opened; control the liquid stop valve 18 to be closed; control the second expansion valve 16 to be fully opened; control the second solenoid valve 13 to be closed; and control the third solenoid valve 15 to be open.

[0144] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in the second cooling and water tank heating mode, the controller 71 controls the first and second interfaces of the four-way valve 4 to be connected, and controls the third and fourth interfaces of the four-way valve 4 to be connected; controls the outdoor expansion valve 3 to be closed; controls multiple first expansion valves 6 to be opened; controls the gas stop valve 9 to be closed; controls the first solenoid valve 10 to be fully opened; controls the liquid stop valve 18 to be closed; controls the second expansion valve 16 to be fully opened; controls the second solenoid valve 13 to be closed; and controls the third solenoid valve 15 to be opened.

[0145] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in the second cooling and water tank heating mode, after the refrigerant flows out of the compressor 1, it flows through the first solenoid valve 10, the third stop valve 11, the water tank heat exchanger 21, the fourth stop valve 17, the second expansion valve 16, multiple first expansion valves 6, multiple second stop valves 8, multiple indoor heat exchangers 5, multiple first stop valves 7 and the four-way valve 4 in sequence before flowing into the compressor 1 again to complete the refrigerant cycle; it can be seen that in the second cooling and water tank heating mode, the refrigerant flows through the water tank heat exchanger 21 and multiple indoor heat exchangers 5 in sequence. Compared with the first cooling and water tank heating mode in which the refrigerant flows through the outdoor heat exchanger 2, the water tank heat exchanger 21 and multiple indoor heat exchangers 5 in sequence, the refrigerant in the second cooling and water tank heating mode does not need to flow through the outdoor heat exchanger 2, thereby reducing heat loss. Therefore, the heat recovery amount in the second cooling and water tank heating mode is higher than the heat recovery amount in the first cooling and water tank heating mode.

[0146] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in the second cooling and water tank heating mode, since the outdoor heat exchanger 2 is not involved, refrigerant is retained in the refrigerant circulation loop. The refrigerant retained in the refrigerant circulation loop flows back to the compressor 1 through the second capillary 14 and the third solenoid valve 15 based on the pressure difference between the flow path and the inlet of the compressor 1. This can avoid refrigerant retention and ensure the refrigerant quantity when the air-conditioning system 110 is in operation, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0147] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, when responding to a control instruction and controlling the one-to-many heat recovery multi-split air-conditioning system 100 to operate in the second cooling and water tank heating mode, the controller 71 controls the corresponding valve to open so that the refrigerant flows through the water tank heat exchanger 21 and multiple indoor heat exchangers 5 in sequence, and uses the heat generated during the operation of the air conditioner to heat the water, organically combining the cooling and hot water functions, which helps to improve energy utilization efficiency, and returns the refrigerant that does not participate in heat exchange in the refrigerant circulation loop to the compressor 1 based on the pressure difference between the flow path and the inlet of the compressor 1, thereby avoiding refrigerant retention and ensuring the refrigerant quantity when the air-conditioning system 110 is in operation, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0148] Figure 13 FIG. 1 is a schematic diagram of the refrigerant flow direction in the heating and water tank heating modes according to an embodiment of the present invention. Figure 13 As shown, in one embodiment of the present invention, the working modes include heating and water tank heating modes; when responding to the control instruction, the one-to-many heat recovery multi-split air-conditioning system 100 is controlled to operate in heating and water tank heating modes, the controller 71 is configured to: control the first interface and the third interface of the four-way valve 4 to be connected, and control the second interface and the fourth interface of the four-way valve 4 to be connected; control the outdoor expansion valve 3 to be opened; control the multiple first expansion valves 6 to be opened; control the gas stop valve 9 to be fully opened; control the first solenoid valve 10 to be fully opened; control the liquid stop valve 18 to be fully opened; control the second expansion valve 16 to be opened; control the second solenoid valve 13 to be closed; control the third solenoid valve 15 to be closed.

[0149] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in heating and water tank heating modes, the controller 71 controls the first and third interfaces of the four-way valve 4 to be connected, and controls the second and fourth interfaces of the four-way valve 4 to be connected; controls the outdoor expansion valve 3 to be opened; controls multiple first expansion valves 6 to be opened; controls the gas stop valve 9 to be fully opened; controls the first solenoid valve 10 to be fully opened; controls the liquid stop valve 18 to be fully opened; controls the second expansion valve 16 to be opened; controls the second solenoid valve 13 to be closed; and controls the third solenoid valve 15 to be closed.

[0150] In a specific embodiment, when the one-to-many heat recovery multi-split air-conditioning system 100 operates in heating and water tank heating modes, after the refrigerant flows out of the compressor 1, one path flows through the gas stop valve 9, the four-way valve 4, multiple first stop valves 7, multiple indoor heat exchangers 5, multiple second stop valves 8, multiple first expansion valves 6, the liquid stop valve 18, the outdoor expansion valve 3, the outdoor heat exchanger 2 and the four-way valve 4 in sequence before flowing into the compressor 1 again, and the other path flows through the first solenoid valve 10, the third stop valve 11, the water tank heat exchanger 21, the fourth stop valve 17, the second expansion valve 16, the liquid stop valve 18, the outdoor expansion valve 3, the outdoor heat exchanger 2 and the four-way valve 4 in sequence before flowing into the compressor 1 again, completing the refrigerant cycle.

[0151] Specifically, according to the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention, when responding to a control instruction and controlling the one-to-many heat recovery multi-split air-conditioning system 100 to operate in heating and water tank heating modes, the controller 71 controls the corresponding valves to open so that the refrigerant flows through multiple indoor heat exchangers 5, water tank heat exchangers 21 and outdoor heat exchangers 2 in sequence, and uses the heat generated during the operation of the air conditioner to heat the water, organically combining the heating and hot water functions, which helps to improve energy utilization efficiency.

[0152] Figure 14FIG. 1 is a schematic diagram of a hot water system according to a specific embodiment of the present invention. Figure 14 As shown, in a specific embodiment of the present invention, the hot water system 120 includes a water inlet, a water outlet and an exhaust valve, and a water inlet valve is provided on the water inlet; the hot water system 120 also includes a high-pressure sensor and a water level sensor, the high-pressure sensor is used to detect the pressure in the water tank 20, and the water level sensor is used to detect the water level in the water tank 20; the hot water system 120 also includes an electric heating device, which is used to use electrical energy to heat the water in the water tank 20.

[0153] In view of the above, the one-to-many heat recovery multi-split air conditioning system 100 provided according to the embodiment of the present invention has the following beneficial effects:

[0154] First, the one-to-many heat recovery multi-split air-conditioning system 100 provided according to an embodiment of the present invention is different from conventional heat pump products in that a branch leading to the water tank is added in the pipeline from the compressor outlet to the four-way valve. This water tank branch is used as part of the condenser to heat the water in the water tank, so it can meet the needs of air conditioning and hot water systems at the same time, and organically combine the cooling, heating and domestic hot water functions; in actual application, users no longer need to configure a separate gas water heater or electric water heater, thereby saving equipment investment and occupied space.

[0155] Secondly, the one-to-many heat recovery multi-split air-conditioning system 100 provided in an embodiment of the present invention can effectively use the heat released indoors in cooling mode to heat the water in the water tank, thereby realizing simultaneous air-conditioning cooling and hot water preparation without the need for additional electric heating, thereby improving energy utilization efficiency and reducing energy consumption, helping users reduce operating costs.

[0156] Finally, the one-to-many heat recovery multi-split air-conditioning system 100 provided according to an embodiment of the present invention utilizes a capillary tube as a throttling device to efficiently recover the refrigerant retained in the branch that is not put into operation, thereby ensuring the full recycling of the refrigerant, thereby improving the system efficiency and preventing efficiency degradation or abnormal operation due to refrigerant retention.

[0157] In summary, the one-to-many heat recovery multi-split air-conditioning system 100 provided according to an embodiment of the present invention includes an interconnected air-conditioning system 110, a hot water system 120, a regulating unit 130, and a controller 71. The hot water system 120 can be used as a condenser. The controller 71 responds to control instructions to control the one-to-many heat recovery multi-split air-conditioning system 100 to operate in different working modes, thereby enriching the working modes of the one-to-many heat recovery multi-split air-conditioning system 100 and improving intelligence. At the same time, the controller 71 controls the status of each component in the regulating unit 130 in different working modes, thereby adjusting the on-off state between the refrigerant circulation loop and the water tank branch, and adjusting the on-off state between the outdoor heat exchanger 2 and the indoor heat exchanger group in the refrigerant circulation loop, so that the refrigerant that does not participate in heat exchange in the refrigerant circulation loop and / or the water tank branch flows back to the compressor 1 based on the pressure difference between the flow path and the inlet of the compressor 1. This can avoid refrigerant retention and ensure the refrigerant amount when the air-conditioning system 110 is in operation, thereby helping to improve the cooling efficiency of the air-conditioning system 110.

[0158] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0159] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A one-to-many heat recovery multi-split air conditioning system, characterized in that: include: An air conditioning system, comprising: A refrigerant circulation loop, wherein the refrigerant circulates in a loop consisting of a compressor, an outdoor heat exchanger, an outdoor expansion valve, an expansion valve group, an indoor heat exchanger group, a stop valve group, and a four-way valve, wherein the indoor heat exchanger group includes a plurality of indoor heat exchangers connected in parallel; A hot water system connected to the air conditioning system, the hot water system comprising: water tank; a water tank heat exchanger, arranged in the water tank; The water tank branch, the water tank heat exchanger is connected to the refrigerant circulation loop through the water tank branch, the water tank branch includes: a first water tank branch and a second water tank branch; wherein, One end of the first water tank branch is connected to the outlet of the compressor, the other end of the first water tank branch is connected to one end of the water tank heat exchanger, one end of the second water tank branch is connected to the other end of the water tank heat exchanger, and the other end of the second water tank branch is connected to one end of the expansion valve group and one end of the outdoor expansion valve; When the water tank heat exchanger is used as a condenser, the refrigerant in the refrigerant circulation loop can flow through the water tank heat exchanger through the water tank branch to perform heat exchange, so that the water tank heat exchanger heats the water in the water tank; a regulating unit, connected to the refrigerant circulation loop and the water tank branch, respectively, and used to regulate the on-off state between the refrigerant circulation loop and the water tank branch, and to regulate the on-off state between the outdoor heat exchanger and the indoor heat exchanger group in the refrigerant circulation loop; A controller is connected to the air conditioning system and the regulating unit respectively, and the controller is configured to: In response to control instructions, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate in different working modes, and in different working modes, the status of each component in the regulating unit is controlled, thereby adjusting the on-off status between the refrigerant circulation loop and the water tank branch, and adjusting the on-off status between the outdoor heat exchanger and the indoor heat exchanger group in the refrigerant circulation loop, so that the refrigerant that does not participate in heat exchange in the refrigerant circulation loop and / or the water tank branch flows back to the compressor based on the pressure difference between the flow path and the inlet of the compressor.

2. The one-to-many heat recovery multi-split air conditioning system according to claim 1 is characterized in that: The first interface of the four-way valve is connected to the outlet of the compressor, the second interface of the four-way valve is connected to the outdoor heat exchanger, the third interface of the four-way valve is connected to the indoor heat exchanger group, and the fourth interface of the four-way valve is connected to the inlet of the compressor; The expansion valve group includes: a plurality of first expansion valves connected in parallel, one end of each first expansion valve being connected to one end of the outdoor expansion valve, and the other end of each first expansion valve being connected to one end of the corresponding indoor heat exchanger; The stop valve assembly comprises: a plurality of first stop valves connected in parallel, one end of each first stop valve being connected to the third interface, and the other end of each first stop valve being connected to the other end of the corresponding indoor heat exchanger; A plurality of second stop valves are connected in parallel, one end of each second stop valve is connected to one end of the corresponding indoor heat exchanger, and the other end of each second stop valve is connected to the other end of the corresponding first expansion valve.

3. The one-to-many heat recovery multi-split air conditioning system according to claim 2 is characterized in that: The adjustment unit includes: a first switch assembly, one end of which is connected to the outlet of the compressor, and the other end of which is connected to the first interface, and the first switch assembly is used to control the on / off state between the outlet of the compressor and the refrigerant circulation circuit; a second switch assembly, disposed on the first water tank branch, one end of the second switch assembly being connected to the outlet of the compressor, and the other end of the second switch assembly being connected to one end of the water tank heat exchanger, the second switch assembly being used to control the on / off state between the first water tank branch and the refrigerant circulation loop; a first throttling control assembly, one end of the first throttling control assembly being connected to the first water tank branch, the other end of the first throttling control assembly being connected to the inlet of the compressor and the fourth interface, the first throttling control assembly being configured to reflux or prevent refrigerant in the water tank branch from refluxing to the compressor by means of its own on / off state; a second throttling control component, one end of the second throttling control component being connected to the refrigerant circulation circuit, the other end of the second throttling control component being connected to the inlet of the compressor and the fourth interface, the second throttling control component being used to reflux or prevent the refrigerant in the outdoor heat exchanger and / or the indoor heat exchanger group from refluxing to the compressor by its own on / off state; a flow regulating assembly disposed on the second water tank path, one end of the flow regulating assembly being connected to the other end of the water tank heat exchanger, and the other end of the flow regulating assembly being connected to one end of the expansion valve group and one end of the outdoor expansion valve, the flow regulating assembly being used to regulate the flow of refrigerant flowing out of the water tank heat exchanger; A third switch assembly, one end of the third switch assembly is connected to one end of the outdoor expansion valve, and the other end of the third switch assembly is connected to one end of the expansion valve group and one end of the flow regulating assembly. The third switch assembly is used to control the on-off state between the indoor heat exchanger group and the outdoor heat exchanger, and to control the on-end state between the second water tank branch and the outdoor heat exchanger.

4. The one-to-many heat recovery multi-split air conditioning system according to claim 3 is characterized in that: The first switch assembly includes a gas stop valve, one end of which is connected to the outlet of the compressor, and the other end of which is connected to the first interface.

5. The one-to-many heat recovery multi-split air conditioning system according to claim 4 is characterized in that: The second switch assembly includes: a first solenoid valve and a third stop valve connected in series on the first water tank branch, wherein one end of the first solenoid valve is connected to the outlet of the compressor, the other end of the first solenoid valve is connected to one end of the third stop valve, and the other end of the third stop valve is connected to one end of the water tank heat exchanger.

6. The one-to-many heat recovery multi-split air conditioning system according to claim 5, characterized in that: The first throttling control component includes: a first capillary tube and a second solenoid valve connected in series, wherein one end of the first capillary tube is connected to the first water tank branch, the other end of the first capillary tube is connected to one end of the second solenoid valve, and the other end of the second solenoid valve is connected to the inlet of the compressor and the fourth interface.

7. The one-to-many heat recovery multi-split air conditioning system according to claim 6, characterized in that: The second throttling control component includes: a second capillary and a third solenoid valve connected in series, wherein one end of the second capillary is connected to the other end of the gas shut-off valve and the first interface, the other end of the second capillary is connected to one end of the third solenoid valve, and the other end of the third solenoid valve is connected to the inlet of the compressor and the fourth interface.

8. The one-to-many heat recovery multi-split air conditioning system according to claim 7, characterized in that: The flow regulating component includes: a second expansion valve and a fourth stop valve connected in series on the second water tank branch, wherein one end of the fourth stop valve is connected to the other end of the water tank heat exchanger, the other end of the fourth stop valve is connected to one end of the second expansion valve, and the other end of the second expansion valve is connected to one end of the expansion valve group and one end of the outdoor expansion valve.

9. The one-to-many heat recovery multi-split air conditioning system according to claim 8, characterized in that: The third switch assembly includes a liquid stop valve, one end of which is connected to one end of the outdoor expansion valve, and the other end of which is connected to one end of the expansion valve group and one end of the flow regulating assembly.

10. The one-to-many heat recovery multi-split air conditioning system according to claim 9, characterized in that: The working mode includes a cooling mode; When, in response to a control instruction, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate in a cooling mode, the controller is configured to: Controlling the first interface and the second interface of the four-way valve to be connected, and controlling the third interface and the fourth interface of the four-way valve to be connected; Controlling the outdoor expansion valve to fully open; controlling the plurality of first expansion valves to open; Controlling the gas stop valve to fully open; controlling the first solenoid valve to close; Controlling the liquid stop valve to fully open; controlling the second expansion valve to close; controlling the second solenoid valve to open; The third solenoid valve is controlled to be closed.

11. The one-to-many heat recovery multi-split air conditioning system according to claim 9, characterized in that: The working modes include: heating mode; When, in response to a control instruction, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate in a heating mode, the controller is configured to: Controlling the first interface and the third interface of the four-way valve to be connected, and controlling the second interface and the fourth interface of the four-way valve to be connected; controlling the outdoor expansion valve to open; controlling the plurality of first expansion valves to open; Controlling the gas stop valve to fully open; controlling the first solenoid valve to close; Controlling the liquid stop valve to fully open; controlling the second expansion valve to close; controlling the second solenoid valve to open; The third solenoid valve is controlled to be closed.

12. The one-to-many heat recovery multi-split air conditioning system according to claim 9, characterized in that: The working modes include: water tank separate heating mode; When, in response to a control instruction, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate in a water tank independent heating mode, the controller is configured to: Controlling the first interface and the third interface of the four-way valve to be connected, and controlling the second interface and the fourth interface of the four-way valve to be connected; controlling the outdoor expansion valve to open; controlling the plurality of first expansion valves to close; Controlling the gas shut-off valve to close; Controlling the first solenoid valve to fully open; Controlling the liquid stop valve to fully open; controlling the second expansion valve to fully open; controlling the second solenoid valve to close; The third solenoid valve is controlled to open.

13. The one-to-many heat recovery multi-split air conditioning system according to claim 9, characterized in that: The working modes include: first cooling and water tank heating mode; When, in response to a control instruction, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate in a first cooling and water tank heating mode, the controller is configured to: Controlling the first interface and the second interface of the four-way valve to be connected, and controlling the third interface and the fourth interface of the four-way valve to be connected; Controlling the outdoor expansion valve to fully open; controlling the plurality of first expansion valves to open; Controlling the gas stop valve to fully open; Controlling the first solenoid valve to fully open; Controlling the liquid stop valve to fully open; controlling the second expansion valve to fully open; controlling the second solenoid valve to close; The third solenoid valve is controlled to be closed.

14. The one-to-many heat recovery multi-split air conditioning system according to claim 9, characterized in that: The working modes include: a second cooling and water tank heating mode; When, in response to a control instruction, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate in a second cooling and water tank heating mode, the controller is configured to: Controlling the first interface and the second interface of the four-way valve to be connected, and controlling the third interface and the fourth interface of the four-way valve to be connected; Controlling the outdoor expansion valve to close; controlling the plurality of first expansion valves to open; Controlling the gas shut-off valve to close; Controlling the first solenoid valve to fully open; Controlling the liquid stop valve to close; controlling the second expansion valve to fully open; controlling the second solenoid valve to close; The third solenoid valve is controlled to open.

15. The one-to-many heat recovery multi-split air conditioning system according to claim 9, characterized in that: The working modes include: heating and water tank heating mode; When, in response to a control instruction, the one-to-many heat recovery multi-split air-conditioning system is controlled to operate in heating and water tank heating modes, the controller is configured to: Controlling the first interface and the third interface of the four-way valve to be connected, and controlling the second interface and the fourth interface of the four-way valve to be connected; controlling the outdoor expansion valve to open; controlling the plurality of first expansion valves to open; Controlling the gas stop valve to fully open; Controlling the first solenoid valve to fully open; Controlling the liquid stop valve to fully open; controlling the second expansion valve to open; controlling the second solenoid valve to close; The third solenoid valve is controlled to be closed.

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