Heat pump air conditioning system

Abstract

The invention relates to the technical field of air conditioners, in particular to a heat pump air conditioning system which comprises a compressor, a first four-way valve, a three-way valve, a control valve, a first two-way valve, a living water tank, an indoor unit and an outdoor unit, a heat exchange component is arranged in the living water tank, the outdoor unit and the heat exchange component are communicated with the indoor unit in parallel, and the control valve and the first four-way valve are communicated with the compressor in parallel; the heat pump air conditioning system is suitable for being switched among multiple operation modes, the multiple operation modes at least comprise a first mode, and in the first mode, the compressor, the control valve, a first channel of the three-way valve, the heat exchange component, a heat absorption channel of the indoor unit and the first two-way valve are sequentially communicated to form a first circulation loop. The application of indoor refrigeration and water heating in summer can be achieved at the same time, and the problems that refrigeration and water heating in summer cannot be conducted at the same time, the requirement for refrigeration and then water heating needs to be met, or the requirement for water heating and then refrigeration needs to be met, and the refrigeration capacity and energy efficiency of the system are obviously limited under the high-temperature working condition in summer are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump air conditioners, and particularly to a heat pump air conditioner system. Background Art

[0002] At present, the application scenarios of air conditioners in daily use are relatively limited. They are usually used in refrigeration, heating, and dehumidification application scenarios. The application scenarios are single, and they can only be used for refrigeration or heating alone, making it difficult to meet different actual life needs. There is an urgent need to develop different uses of air conditioners to improve the diversity of air conditioner uses. When a domestic hot water system is in daily use, an electric heating system or a gas heating system is generally adopted. However, the electric heating has low energy efficiency and high operating costs, and the gas heating has high safety risks and complex installations. Summary of the Invention

[0003] The present invention provides a heat pump air conditioner system to solve one of the defects in the prior art. The present invention can simultaneously realize the applications of indoor refrigeration and domestic hot water production in summer, solving the problems that refrigeration and domestic hot water production cannot operate simultaneously in summer, and it is necessary to first meet the refrigeration demand and then the domestic hot water production demand, or first meet the domestic hot water production demand and then the refrigeration demand, as well as the obvious limitation of the system refrigeration capacity and energy efficiency under high temperature conditions in summer.

[0004] The present invention provides a heat pump air conditioner system, including: a compressor, a first four-way valve, a three-way valve, a control valve, a first two-way valve, a domestic water tank, an indoor unit, and an outdoor unit. A heat exchange component is provided in the domestic water tank. The outdoor unit and the heat exchange component are connected in parallel and communicated with the indoor unit, and the control valve and the first four-way valve are connected in parallel and communicated with the compressor; The heat pump air conditioner system is adapted to switch between multiple operating modes. Among them, the multiple operating modes at least include a first mode. In the first mode, the compressor, the control valve, the first passage of the three-way valve, the heat exchange component, the heat absorption passage of the indoor unit, and the first two-way valve are sequentially connected to form a first circulation loop.

[0005] According to a heat pump air conditioner system provided by the present invention, the multiple operating modes further include a second mode. In the second mode, the compressor, the fourth passage of the first four-way valve, the heat release passage of the outdoor unit, the heat absorption passage of the indoor unit, and the first two-way valve are sequentially connected to form a second circulation loop.

[0006] According to a heat pump air conditioner system provided by the present invention, the multiple operating modes further include a third mode. In the third mode, the compressor, the control valve, the first passage of the three-way valve, the heat exchange component, the heat absorption passage of the outdoor unit, and the second passage of the first four-way valve are sequentially connected to form a third circulation loop.

[0007] A heat pump air conditioning system provided according to the present invention, the multiple operating modes further include a fourth mode, in the fourth mode, the compressor, the control valve, the second passage of the three-way valve, the heat release passage of the indoor unit, the heat absorption passage of the outdoor unit and the second passage of the first four-way valve are sequentially connected to form a fourth circulation loop.

[0008] A heat pump air conditioning system provided according to the present invention, the heat pump air conditioning system is adapted to switch between a first mode, a second mode, a third mode and a fourth mode, the outlet of the heat exchange component is connected to a first pipeline, the outdoor unit is connected to the first pipeline through a second pipeline, the indoor unit is connected to the first pipeline through a third pipeline, the first pipeline is provided with a first expansion valve, in the first mode and the third mode, the first expansion valve is opened, in the second mode and the fourth mode, the first expansion valve is closed.

[0009] A heat pump air conditioning system provided according to the present invention, the second pipeline is provided with a second expansion valve, in the second mode, the third mode and the fourth mode, the second expansion valve is opened, in the first mode, the second expansion valve is closed.

[0010] A heat pump air conditioning system provided according to the present invention, the third pipeline is provided with a third expansion valve, in the first mode, the second mode and the fourth mode, the third expansion valve is opened, in the third mode, the third expansion valve is closed.

[0011] A heat pump air conditioning system provided according to the present invention, the control valve is a second four-way valve, in the first mode, the third mode and the fourth mode, the first passage of the second four-way valve and the first passage of the first four-way valve are connected in parallel at the outlet of the compressor, the second passage of the second four-way valve and the second passage of the first four-way valve are connected in parallel at the inlet of the compressor, in the second mode, the fourth passage of the second four-way valve and the fourth passage of the first four-way valve are connected in parallel at the outlet of the compressor, the third passage of the second four-way valve and the third passage of the first four-way valve are connected in parallel at the inlet of the compressor.

[0012] A heat pump air conditioning system provided according to the present invention, the control valve is a second two-way valve, in the first mode, the third mode and the fourth mode, the second two-way valve and the first passage of the first four-way valve are connected in parallel at the outlet of the compressor, in the second mode, the second two-way valve and the fourth passage of the first four-way valve are connected in parallel at the outlet of the compressor.

[0013] A heat pump air conditioning system provided according to the present invention further includes a controller, the controller is adapted to control the opening degrees of the first expansion valve, the second expansion valve and the third expansion valve.

[0014] The heat pump air-conditioning system provided by the present invention mainly consists of a compressor, a first four-way valve, a three-way valve, a control valve, a first two-way valve, a domestic water tank, an indoor unit and an outdoor unit. Through the application of the first four-way valve and the control valve being connected in parallel to the compressor, combining the basic air-conditioning system and the domestic water system, a heat pump air-conditioning system that can be used in various living scenarios is formed.

[0015] The heat pump air-conditioning system can switch between multiple operating modes. In different modes, the first four-way valve, the control valve, the first two-way valve and the three-way valve switch to different states, so that the compressor, the domestic water tank, the indoor unit and the outdoor unit form different circulation circuits. The first four-way valve, the control valve, the first two-way valve and the three-way valve all have a first state and a second state. Different inlet and outlet ports of the first four-way valve are connected in different states, forming different paths inside the first four-way valve. The first path and the second path are formed in the first state, and the third path and the fourth path are formed in the second state. The control valve is connected in the first state and disconnected in the second state. The first two-way valve is opened in the first state and closed in the second state. Different inlet and outlet ports of the three-way valve are connected in different states, forming different paths inside the three-way valve. The first path is formed in the first state, and the second path is formed in the second state.

[0016] Domestic water is contained in the domestic water tank, and a heat exchange component is also provided inside. The heat exchange component can be used as a part of the refrigerant circulation in the circulation circuit. When the refrigerant flows through the heat exchange component, it can exchange heat with the domestic water to raise the temperature of the domestic water and achieve the effect of making hot water.

[0017] The first mode among multiple operating modes is the parallel mode of making hot water and refrigeration. When the heat pump air-conditioning system switches to the first mode of operation, the first four-way valve is in the first state, the control valve is in the first state, the three-way valve is in the first state, and the first two-way valve is in the first state. At this time, the outlet of the compressor, the control valve, the first path of the three-way valve, the heat exchange component, the heat absorption path of the indoor unit, the first two-way valve and the inlet of the compressor are connected in sequence to form a first circulation circuit. The refrigerant is discharged from the compressor cavity, passes through the control valve and the first path of the three-way regulating valve in sequence, and then enters the heat exchange component of the domestic water tank to dissipate heat. At this time, the domestic water in the domestic water tank exchanges heat with the heat exchange component, the domestic water absorbs heat and rises in temperature, the refrigerant in the heat exchange component releases heat and drops in temperature, and the refrigerant after cooling enters the heat absorption path of the indoor unit to evaporate and absorb heat to cool the indoor environment. After the refrigerant rises in temperature, it returns to the compressor through the first two-way valve.

[0018] In the refrigeration and hot water heating scenario in the first mode, it is equivalent to the refrigerant absorbing the heat on the indoor side to heat the domestic water tank, enabling the system to recover heat and improve system energy efficiency. Moreover, compared with the prior art method of inputting the high-temperature refrigerant of the compressor into the outdoor unit for cooling and then inputting it into the indoor unit for cooling, the present invention uses the domestic water in the domestic water tank to cool the refrigerant. The domestic water itself has a relatively low temperature and a large specific heat capacity, which can absorb more cold energy to make the refrigerant condense and cool more thoroughly. As a result, the heat exchange on the indoor unit side is more sufficient, improving the indoor cooling effect and being more conducive to application in the high-temperature outdoor environment in summer.

[0019] The present invention can simultaneously achieve the application of indoor cooling and hot water heating in summer, solving the problems that cooling and hot water heating cannot operate simultaneously in summer, the need to first meet the cooling demand and then the hot water heating demand, or vice versa, and the obvious limitation of the system's cooling capacity and energy efficiency under high-temperature operating conditions in summer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of a heat pump air-conditioning system provided by an embodiment of the present invention; Figure 2 It is one of the schematic structural diagrams of the control valve of the heat pump air-conditioning system provided by an embodiment of the present invention being a second four-way valve; Figure 3 It is another schematic structural diagram of the control valve of the heat pump air-conditioning system provided by an embodiment of the present invention being a second four-way valve; Figure 4 It is yet another schematic structural diagram of the control valve of the heat pump air-conditioning system provided by an embodiment of the present invention being a second four-way valve; Figure 5 It is still another schematic structural diagram of the control valve of the heat pump air-conditioning system provided by an embodiment of the present invention being a second four-way valve; Figure 6 It is one of the schematic structural diagrams of the control valve of the heat pump air-conditioning system provided by an embodiment of the present invention being a second two-way valve; Figure 7 It is another schematic structural diagram of the control valve of the heat pump air-conditioning system provided by an embodiment of the present invention being a second two-way valve; Figure 8 It is yet another schematic structural diagram of the control valve of the heat pump air-conditioning system provided by an embodiment of the present invention being a second two-way valve; Figure 9 This is the fourth schematic diagram of the control valve of the heat pump air conditioning system provided by the embodiment of the present invention being a second two-way valve.

[0022] Reference numerals: 100, compressor; 200, first four-way valve; 300, control valve; 310, second four-way valve; 320, second two-way valve; 400, domestic water tank; 410, heat exchange component; 420, first pipeline; 421, first expansion valve; 500, indoor unit; 510, third pipeline; 511, third expansion valve; 600, outdoor unit; 610, second pipeline; 611, second expansion valve; 700, three-way valve; 800, first two-way valve. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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 thus should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0026] In the embodiments of the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0028] As Figure 1 and Figure 2 As shown, a heat pump air conditioning system provided by an embodiment of the present invention includes a compressor 100, a first four-way valve 200, a three-way valve 700, a control valve 300, a first two-way valve 800, a domestic water tank 400, an indoor unit 500, and an outdoor unit 600. A heat exchange component 410 is provided in the domestic water tank 400. The outdoor unit 600 and the heat exchange component 410 are connected in parallel to the indoor unit 500, and the control valve 300 and the first four-way valve 200 are connected in parallel to the compressor 100; the heat pump air conditioning system is adapted to switch between multiple operating modes, wherein the multiple operating modes at least include a first mode. In the first mode, the compressor 100, the control valve 300, the first passage of the three-way valve 700, the heat exchange component 410, the heat absorption passage of the indoor unit 500, and the first two-way valve 800 are sequentially connected to form a first circulation loop.

[0029] The heat pump air conditioning system of the embodiment of the present invention mainly consists of a compressor 100, a first four-way valve 200, a three-way valve 700, a control valve 300, a first two-way valve 800, a domestic water tank 400, an indoor unit 500, and an outdoor unit 600. Through the application of the parallel connection of the first four-way valve 200 and the control valve 300 to the compressor 100, combining the basic air conditioning system and the domestic water system, a heat pump air conditioning system that can be used in multiple living scenarios is formed.

[0030] The heat pump air conditioning system can switch between multiple operating modes. In different modes, the first four-way valve 200, the control valve 300, the first two-way valve 800, and the three-way valve 700 switch to different states, enabling the compressor 100, the domestic water tank 400, the indoor unit 500, and the outdoor unit 600 to form different circulation circuits. The first four-way valve 200, the control valve 300, the first two-way valve 800, and the three-way valve 700 all have a first state and a second state. Different inlet and outlet ports of the first four-way valve 200 are connected in different states, forming different paths inside the first four-way valve 200. A first path and a second path are formed in the first state, and a third path and a fourth path are formed in the second state. The control valve 300 is connected in the first state and disconnected in the second state. The first two-way valve 800 is open in the first state and closed in the second state. Different inlet and outlet ports of the three-way valve 700 are connected in different states, forming different paths inside the three-way valve 700. A first path is formed in the first state, and a second path is formed in the second state.

[0031] The domestic water tank 400 contains domestic water and also has a heat exchange component 410 inside. The heat exchange component 410 can be a part of the refrigerant circulation in the circulation circuit. When the refrigerant flows through the heat exchange component 410, it can exchange heat with the domestic water to raise the temperature of the domestic water and achieve the effect of making hot water.

[0032] The first mode among multiple operating modes is the parallel mode of making hot water and refrigeration. When the heat pump air conditioning system switches to the first mode of operation, the first four-way valve 200 is in the first state, the control valve 300 is in the first state, the three-way valve 700 is in the first state, and the first two-way valve 800 is in the first state. At this time, the outlet of the compressor 100, the control valve 300, the first path of the three-way valve 700, the heat exchange component 410, the heat absorption path of the indoor unit 500, the first two-way valve 800, and the inlet of the compressor 100 are connected in sequence to form a first circulation circuit. The refrigerant is discharged from the cavity of the compressor 100, passes through the control valve 300 and the first path of the three-way regulating valve in sequence, and then enters the heat exchange component 410 of the domestic water tank 400 to dissipate heat. At this time, the domestic water in the domestic water tank 400 exchanges heat with the heat exchange component 410, the domestic water absorbs heat and warms up, the refrigerant in the heat exchange component 410 releases heat and cools down, the cooled refrigerant enters the heat absorption path of the indoor unit 500 to evaporate and absorb heat to cool the indoor environment, and the refrigerant returns to the compressor 100 through the first two-way valve 800 after warming up.

[0033] In the refrigeration and hot water heating scenario in the first mode, it is equivalent to the refrigerant absorbing the heat on the indoor side to heat the domestic water tank 400, enabling the recovery of system heat and improving the system energy efficiency. Moreover, compared with the prior art method of inputting the high-temperature refrigerant of the compressor 100 into the outdoor unit 600 for cooling and then inputting it into the indoor unit 500 for cooling, the present invention uses the domestic water in the domestic water tank 400 to cool the refrigerant. The domestic water itself has a relatively low temperature and a large specific heat capacity, which can absorb more cold energy to make the refrigerant condensation and cooling more thorough. Furthermore, the heat exchange on the indoor unit 500 side is more sufficient, improving the indoor cooling effect and being more conducive to application in the high-temperature outdoor environment in summer.

[0034] The present invention can simultaneously realize the application of indoor cooling and hot water heating in summer, solving the problems that cooling and hot water heating cannot operate simultaneously in summer, that is, it is necessary to first meet the cooling demand and then the hot water heating demand, or first meet the hot water heating demand and then the cooling demand, and the obvious limitation of the system cooling capacity and energy efficiency under high-temperature working conditions in summer.

[0035] As Figure 3 shown, according to an embodiment provided by the present invention, the multiple operating modes further include a second mode. In the second mode, the compressor 100, the fourth passage of the first four-way valve 200, the heat release passage of the outdoor unit 600, the heat release passage of the indoor unit 500, and the first two-way valve 800 are sequentially connected to form a second circulation loop.

[0036] In this embodiment, the second mode among the multiple operating modes is the refrigeration mode. When the heat pump air-conditioning system switches to the second mode of operation, the first four-way valve 200 is in the second state, the control valve 300 is in the second state, the three-way valve 700 is in the second state, and the first two-way valve 800 is in the first state. At this time, the outlet of the compressor 100, the fourth passage of the first four-way valve 200, the heat release passage of the outdoor unit 600, the heat absorption passage of the indoor unit 500, the first two-way valve 800, and the inlet of the compressor 100 are sequentially connected to form a second circulation loop. The refrigerant is discharged from the cavity of the compressor 100, enters the heat release passage of the outdoor unit 600 through the fourth passage of the first four-way valve 200 for heat dissipation and condensation. The cooled refrigerant enters the heat absorption passage of the indoor unit 500 to evaporate and absorb heat to cool the indoor environment. After the refrigerant temperature rises, it returns to the compressor 100 through the first two-way valve 800.

[0037] In the refrigeration scenario in the second mode, through the state and passage conversion of the first four-way valve 200, the control valve 300, the three-way valve 700, and the first two-way valve 800, the refrigerant enters the outdoor unit 600 side for condensation and cooling, and then enters the indoor unit 500 side to evaporate and absorb heat to cool the indoor side, realizing indoor cooling at normal temperatures. The condensation effect of the outdoor unit 600 on the refrigerant is more efficient and significant, thereby meeting the heat pump air-conditioning system to achieve a more energy-saving and efficient effect by operating different modes under different environmental working conditions.

[0038] The present invention solves the problems of limited application scenarios of traditional air conditioners and low energy efficiency of traditional water systems. By using the form of parallel connection of the first four-way valve 200 and the control valve 300, while fully expanding the application scenarios of traditional air conditioners, the energy efficiency of the domestic water system is improved, and the living experience of users in the daily use of the air-conditioning heat pump system can be fully improved and satisfied.

[0039] As Figure 4 shown, according to an embodiment provided by the present invention, the multiple operating modes further include a third mode. In the third mode, the compressor 100, the control valve 300, the first passage of the three-way valve 700, the heat exchange component 410, the heat absorption passage of the outdoor unit 600, and the second passage of the first four-way valve 200 are sequentially connected to form a third circulation loop.

[0040] In this embodiment, the third mode among the multiple operating modes is the hot water heating mode. When the heat pump air-conditioning system switches to the third mode of operation, the first four-way valve 200 is in the first state, the control valve 300 is in the first state, the three-way valve 700 is in the first state, and the first two-way valve 800 is in the second state. At this time, the outlet of the compressor 100, the control valve 300, the first passage of the three-way valve 700, the heat exchange component 410 of the domestic water tank 400, the heat absorption passage of the outdoor unit 600, and the second passage of the first four-way valve 200 are sequentially connected to the inlet of the compressor 100 to form a third circulation loop. The refrigerant is discharged from the cavity of the compressor 100, sequentially enters the heat exchange component 410 through the control valve 300 and the first passage of the three-way valve 700 for heat dissipation. At this time, the domestic water in the domestic water tank 400 exchanges heat with the heat exchange component 410, and the cooled refrigerant enters the heat absorption passage of the outdoor unit 600 to evaporate and absorb heat. After the refrigerant is heated, it returns to the compressor 100 through the second passage of the first four-way valve 200 in sequence.

[0041] In the hot water heating scenario in the third mode, through the state and passage conversion of the first four-way valve 200, the control valve 300, the three-way valve 700, and the first two-way valve 800, the high-temperature refrigerant of the compressor 100 enters the heat exchange component 410 of the domestic water tank 400 to condense and cool down, that is, to heat up the domestic water in the domestic water tank 400, and then directly enters the outdoor unit 600 to evaporate and absorb heat without entering the indoor unit 500. It is equivalent to using the heat of the environment temperature where the outdoor unit 600 is located for heating the domestic water in the domestic water tank 400, so as to meet the requirements of the heat pump air-conditioning system in different environmental conditions, achieve a more energy-saving and efficient effect by operating different modes, improve the system energy efficiency, and do not affect the indoor temperature.

[0042] The present invention solves the problems of limited application scenarios of traditional air conditioners and low energy efficiency of traditional water systems. By using the first four-way valve 200 and the control valve 300 in parallel, it not only fully expands the application scenarios of traditional air conditioners but also improves the energy efficiency of the domestic water system, thus fully enhancing and meeting the living experience of users in the daily use of air-conditioning heat pump systems.

[0043] As Figure 5 shown, according to an embodiment provided by the present invention, the multiple operating modes further include a fourth mode. In the fourth mode, the compressor 100, the control valve 300, the second passage of the three-way valve 700, the heat release passage of the indoor unit 500, the heat absorption passage of the outdoor unit 600, and the second passage of the first four-way valve 200 are sequentially connected to form a fourth circulation loop.

[0044] In this embodiment, the fourth mode among the multiple operating modes is a heating mode. When the heat pump air-conditioning system switches to the fourth mode of operation, the first four-way valve 200 is in the first state, the control valve 300 is in the first state, the three-way valve 700 is in the second state, and the first two-way valve 800 is in the first state. At this time, the outlet of the compressor 100, the control valve 300, the second passage of the three-way valve 700, the heat release passage of the indoor unit 500, the heat absorption passage of the outdoor unit 600, the second passage of the first four-way valve 200, and the inlet of the compressor 100 are sequentially connected to form a fourth circulation loop. The refrigerant is discharged from the cavity of the compressor 100, passes through the control valve 300 and the second passage of the three-way valve 700 in sequence, and then enters the heat release passage of the indoor unit 500 for condensation and heat dissipation. At this time, the indoor environment is heated and the temperature rises. The cooled refrigerant enters the heat absorption passage of the outdoor unit 600 to evaporate and absorb heat. After the refrigerant temperature rises, it returns to the compressor 100 through the second passage of the first four-way valve 200 in sequence.

[0045] In the heating scenario of the fourth mode, through the state and passage conversion of the first four-way valve 200, the control valve 300, the three-way valve 700, and the first two-way valve 800, the high-temperature refrigerant of the compressor 100 enters the indoor unit 500 for condensation and temperature reduction, which is the heating and temperature increase of the indoor environment, and then directly enters the outdoor unit 600 to evaporate and absorb heat without entering the hot water supply. This is equivalent to using the heat of the environment temperature where the outdoor unit 600 is located for indoor heating by the refrigerant. In different environmental conditions, the heat pump air-conditioning system can achieve a more energy-saving and efficient effect by operating different modes, improving the system energy efficiency without affecting the indoor temperature.

[0046] The present invention solves the problems of limited application scenarios of traditional air conditioners and low energy efficiency of traditional water systems. By using the first four-way valve 200 and the control valve 300 in parallel, it not only fully expands the application scenarios of traditional air conditioners but also improves the energy efficiency of the domestic water system, thus fully enhancing and meeting the living experience of users in the daily use of air-conditioning heat pump systems.

[0047] According to an embodiment provided by the present invention, the heat pump air conditioning system is adapted to switch between a first mode, a second mode, a third mode, and a fourth mode. The outlet of the heat exchange component 410 is connected to the first pipeline 420, the outdoor unit 600 is connected to the first pipeline 420 through the second pipeline 610, and the indoor unit 500 is connected to the first pipeline 420 through the third pipeline 510. A first expansion valve 421 is provided on the first pipeline 420. In the first mode and the third mode, the first expansion valve 421 is opened, and in the second mode and the fourth mode, the first expansion valve 421 is closed.

[0048] In this embodiment, the compressor 100, the first four-way valve 200, the control valve 300, the heat exchange component 410 of the domestic water tank 400, the indoor unit 500, and the outdoor unit 600 are all connected through pipelines. Among them, a branch pipeline is formed between the indoor unit 500, the outdoor unit 600, and the heat exchange component 410. The outlet of the heat exchange component 410 is provided with the first pipeline 420, the outdoor unit 600 is provided with the second pipeline 610, and the indoor unit 500 is provided with the third pipeline 510. The second pipeline 610 and the third pipeline 510 are both aggregated to the first pipeline 420 to realize the interconnection of the three.

[0049] A first expansion valve 421 is provided on the first pipeline 420. The opening and closing of the first expansion valve 421 control whether the refrigerant in the circulation loop flows through the heat exchange component 410 of the domestic water tank 400, that is, control whether the domestic water tank 400 participates in the refrigerant heat exchange in the corresponding mode. In the first mode and the third mode, the first expansion valve 421 is opened, and the refrigerant enters the heat exchange component 410 to exchange heat with the domestic water in the domestic water tank 400. In the second mode and the fourth mode, the first expansion valve 421 is closed, and the refrigerant enters the indoor unit 500 from the outdoor unit 600 or enters the outdoor unit 600 from the indoor unit 500 without passing through the heat exchange component 410, and the air conditioning system does not act on the domestic water.

[0050] In this embodiment, the first four-way valve 200 and the control valve 300 are connected in parallel to combine the air conditioning system and the domestic water system. The switching of the first four-way valve 200, the control valve 300, the three-way valve 700, the first two-way valve 800, and the first expansion valve 421 cooperate with each other to realize the application of different living scenarios.

[0051] According to an embodiment provided by the present invention, a second expansion valve 611 is provided on the second pipeline 610. In the second mode, the third mode, and the fourth mode, the second expansion valve 611 is opened, and in the first mode, the second expansion valve 611 is closed.

[0052] In this embodiment, a second expansion valve 611 is provided on the second pipeline 610. The opening and closing of the second expansion valve 611 controls whether the refrigerant in the circulation loop flows through the outdoor unit 600, that is, controls whether the outdoor unit 600 participates in the refrigerant heat exchange in the corresponding mode. Moreover, the second expansion valve 611 also throttles and reduces the pressure of the refrigerant flowing through the second pipeline 610. In the second mode, the third mode, and the fourth mode, the second expansion valve 611 is opened, and the refrigerant enters the outdoor unit 600 for condensation heat exchange or evaporation heat exchange. In the first mode, the second expansion valve 611 is closed, and the refrigerant enters the indoor unit 500 from the heat exchange component 410 of the domestic water tank 400 without passing through the outdoor unit 600, and the air-conditioning system does not utilize the outdoor unit 600 to act on the refrigerant.

[0053] In this embodiment, the first four-way valve 200 is connected in parallel with the control valve 300 to combine the air-conditioning system and the domestic water system. The switching of the first four-way valve 200, the control valve 300, the three-way valve 700, the first two-way valve 800, the first expansion valve 421, and the second expansion valve 611 cooperate with each other to realize the application of different living scenarios.

[0054] According to an embodiment provided by the present invention, a third expansion valve 511 is provided on the third pipeline 510. In the first mode, the second mode, and the fourth mode, the third expansion valve 511 is opened, and in the third mode, the third expansion valve 511 is closed.

[0055] In this embodiment, a third expansion valve 511 is provided on the third pipeline 510. The opening and closing of the third expansion valve 511 controls whether the refrigerant in the circulation loop flows through the indoor unit 500, that is, controls whether the indoor unit 500 participates in the refrigerant heat exchange in the corresponding mode. Moreover, the third expansion valve 511 also throttles and reduces the pressure of the refrigerant flowing through the third pipeline 510. In the first mode, the second mode, and the fourth mode, the third expansion valve 511 is opened, and the refrigerant enters the indoor unit 500 for condensation heat exchange or evaporation heat exchange. In the third mode, the third expansion valve 511 is closed, and the refrigerant enters the outdoor unit 600 from the heat exchange component 410 of the domestic water tank 400 without passing through the indoor unit 500, and the air-conditioning system does not utilize the indoor unit 500 to act on the refrigerant.

[0056] In this embodiment, the first four-way valve 200 is connected in parallel with the control valve 300 to combine the air-conditioning system and the domestic water system. The switching of the first four-way valve 200, the control valve 300, the three-way valve 700, the first two-way valve 800, the first expansion valve 421, the second expansion valve 611, and the third expansion valve 511 cooperate with each other to realize the application of different living scenarios.

[0057] In other embodiments, a three-way valve 700 may also be provided at the connection position of the first pipeline 420, the second pipeline 610 and the third pipeline 510 to ensure that the three pipelines can be connected pairwise, so as to meet the connection of the circulation loop in different modes. At the same time, throttling devices are provided on the second pipeline 610 and the third pipeline 510 to achieve the effect of throttling and pressure reduction.

[0058] According to a heat pump air-conditioning system provided by the present invention, the control valve 300 is a second four-way valve 310. In the first mode, the third mode and the fourth mode, the first passage of the second four-way valve 310 and the first passage of the first four-way valve 200 are connected in parallel at the outlet of the compressor 100, and the second passage of the second four-way valve 310 and the second passage of the first four-way valve 200 are connected in parallel at the inlet of the compressor 100. In the second mode, the fourth passage of the second four-way valve 310 and the fourth passage of the first four-way valve 200 are connected in parallel at the outlet of the compressor 100, and the third passage of the second four-way valve 310 and the third passage of the first four-way valve 200 are connected in parallel at the inlet of the compressor 100.

[0059] In this embodiment, the control valve 300 can be selected as the second four-way valve 310. The control valve 300 has a first state and a second state. Different inlet and outlet ports of the second four-way valve 310 are connected in different states, forming different passages inside the second four-way valve 310. A first passage and a second passage are formed in the first state, and a third passage and a fourth passage are formed in the second state.

[0060] In the first mode, the outlet of the compressor 100, the first passage of the second four-way valve 310, the first passage of the three-way valve 700, the heat exchange component 410, the heat absorption passage of the indoor unit 500, the first two-way valve 800 and the inlet of the compressor 100 are sequentially connected to form a first circulation loop. The outlet of the compressor 100 is connected to the first passage of the first four-way valve 200, but the refrigerant does not flow. The second passage of the second four-way valve 310, the second passage of the first four-way valve 200 and the condenser are sequentially connected, but the refrigerant does not flow.

[0061] In the second mode, the outlet of the compressor 100, the fourth passage of the first four-way valve 200, the heat release passage of the outdoor unit 600, the heat absorption passage of the indoor unit 500, the first two-way valve 800 and the inlet of the compressor 100 are sequentially connected to form a second circulation loop. The fourth passage of the second four-way valve 310 is connected to the outlet of the compressor 100, but the refrigerant does not flow. The third passage of the first four-way valve 200 is connected to the third passage of the second four-way valve 310, but the refrigerant does not flow.

[0062] In the third mode, the outlet of the compressor 100, the first passage of the second four-way valve 310, the first passage of the three-way valve 700, the heat exchange component 410 of the domestic water tank 400, the heat absorption passage of the outdoor unit 600, the second passage of the first four-way valve 200 and the inlet of the compressor 100 are sequentially connected to form a third circulation loop. The first passage of the first four-way valve 200 is connected to the outlet of the compressor 100 but the refrigerant does not flow, and the second passage of the second four-way valve 310 is connected to the second passage of the first four-way valve 200 but the refrigerant does not flow.

[0063] In the fourth mode, the outlet of the compressor 100, the first passage of the second four-way valve 310, the second passage of the three-way valve 700, the heat release passage of the indoor unit 500, the heat absorption passage of the outdoor unit 600, the second passage of the first four-way valve 200 and the inlet of the compressor 100 are sequentially connected to form a fourth circulation loop. The first passage of the first four-way valve 200 is connected to the outlet of the compressor 100 but the refrigerant does not flow, and the second passage of the second four-way valve 310 is connected to the second passage of the first four-way valve 200 but the refrigerant does not flow.

[0064] As Figure 6 、 Figure 7 、 Figure 8 and Figure 9 shown, according to a heat pump air conditioning system provided by the present invention, the control valve 300 is a second two-way valve 320. In the first mode, the third mode and the fourth mode, the second two-way valve 320 and the first passage of the first four-way valve 200 are connected in parallel to the outlet of the compressor 100. In the second mode, the second two-way valve 320 and the fourth passage of the first four-way valve 200 are connected in parallel to the outlet of the compressor 100.

[0065] In this embodiment, the control valve 300 can be selected as the second two-way valve 320. The second two-way valve 320 is open in the first state and closed in the second state.

[0066] The first four-way valve 200 and the second four-way valve 310 can adjust the flow path by power on and off. The three-way valve 700 makes the No. 1 port and the No. 3 port conduct through power control, and the No. 2 port is fully closed to form the first passage, or the No. 1 port and the No. 2 port conduct, and the No. 3 port is fully closed to form the second passage. The first two-way valve 800 and the second two-way valve 320 are opened and closed by power on and off.

[0067] The No. 1 port of the three-way valve 700 is connected to the control valve 300, the No. 2 port is connected to the indoor unit 500, and the No. 3 port is connected to the inlet of the heat exchange component 410 of the domestic water tank 400. One end of the first two-way valve 800 is connected to the inlet of the compressor 100, and the other end is connected to the pipeline where the No. 2 port of the three-way valve 700 is connected to the indoor unit 500.

[0068] According to an embodiment provided by the present invention, there are multiple indoor units 500, and the multiple indoor units 500 are arranged in parallel.

[0069] In this embodiment, there may be multiple indoor units 500 in the heat pump air-conditioning system. The arrangement of the parallel indoor units 500 can meet the cooling and heating requirements of different indoor spaces, and each indoor unit 500 can be independently controlled whether to participate in the working mode of the circulation loop.

[0070] According to an embodiment provided by the present invention, the domestic water tank 400 is a storage water tank or a flowing water tank.

[0071] In this embodiment, the domestic water tank 400 can be a storage water tank or a flowing water tank. Domestic water can be stored in the storage water tank and discharged when needed, or domestic water is connected to the flowing water tank to keep the water flow in the flowing water tank in a state of flowing in and out.

[0072] According to an embodiment provided by the present invention, the heat pump air-conditioning system further includes a controller, and the controller is adapted to control the opening degrees of the first expansion valve 421, the second expansion valve 611, and the third expansion valve 511.

[0073] In this embodiment, the heat pump air-conditioning system mainly consists of a compressor 100, an indoor unit 500, an outdoor unit 600, a domestic water tank 400, a first four-way valve 200, a control valve 300, a first two-way valve 800, a three-way valve 700, and a controller. The controller is electrically connected to the first expansion valve 421, the second expansion valve 611, and the third expansion valve 511, and can control the opening degrees of the first expansion valve 421, the second expansion valve 611, and the third expansion valve 511 according to the selection of different operating modes of the heat pump air-conditioning system.

[0074] When operating in the first mode for parallel indoor cooling and domestic hot water production, the controller controls the first expansion valve 421 to be fully open, the second expansion valve 611 to be fully closed, and the first expansion valve 421 to throttle; when operating in the second mode for indoor cooling, the controller controls the first expansion valve 421 to be fully closed, the second expansion valve 611 to be fully open, and the third expansion valve 511 to throttle; when operating in the third mode for domestic hot water production, the controller controls the first expansion valve 421 to be fully open, the second expansion valve 611 to throttle, and the third expansion valve 511 to be fully closed; when operating in the fourth mode for indoor heating, the controller controls the first expansion valve 421 to be fully closed, the first expansion valve 421 to throttle, and the second expansion valve 611 to be fully open.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat pump air conditioning system, characterized in that, Comprising: A compressor (100), a first four-way valve (200), a three-way valve (700), a control valve (300), a first two-way valve (800), a domestic water tank (400), an indoor unit (500) and an outdoor unit (600). A heat exchange component (410) is provided inside the domestic water tank (400). The outdoor unit (600) and the heat exchange component (410) are connected in parallel and communicated with the indoor unit (500). The control valve (300) and the first four-way valve (200) are connected in parallel and communicated with the compressor (100); The heat pump air-conditioning system is adapted to switch between multiple operating modes. Among them, the multiple operating modes at least include a first mode. In the first mode, the compressor (100), the control valve (300), the first passage of the three-way valve (700), the heat exchange component (410), the heat absorption passage of the indoor unit (500) and the first two-way valve (800) are sequentially connected to form a first circulation loop.

2. The heat pump air-conditioning system according to claim 1, wherein The multiple operating modes further include a second mode. In the second mode, the compressor (100), the fourth passage of the first four-way valve (200), the heat release passage of the outdoor unit (600), the heat absorption passage of the indoor unit (500) and the first two-way valve (800) are sequentially connected to form a second circulation loop.

3. The heat pump air-conditioning system according to claim 1, characterized in that The multiple operating modes further include a third mode. In the third mode, the compressor (100), the control valve (300), the first passage of the three-way valve (700), the heat exchange component (410), the heat absorption passage of the outdoor unit (600) and the second passage of the first four-way valve (200) are sequentially connected to form a third circulation loop.

4. The heat pump air conditioning system according to claim 1, wherein The multiple operating modes further include a fourth mode. In the fourth mode, the compressor (100), the control valve (300), the second passage of the three-way valve (700), the heat release passage of the indoor unit (500), the heat absorption passage of the outdoor unit (600) and the second passage of the first four-way valve (200) are sequentially connected to form a fourth circulation loop.

5. The heat pump air conditioning system according to claims 1 to 4, characterized in that, The heat pump air-conditioning system is adapted to switch between the first mode, the second mode, the third mode and the fourth mode. The outlet of the heat exchange component (410) is connected to a first pipeline (420). The outdoor unit (600) is connected to the first pipeline (420) through a second pipeline (610). The indoor unit (500) is connected to the first pipeline (420) through a third pipeline (510). A first expansion valve (421) is provided on the first pipeline (420). In the first mode and the third mode, the first expansion valve (421) is open. In the second mode and the fourth mode, the first expansion valve (421) is closed.

6. The heat pump air conditioning system according to claim 5, wherein, A second expansion valve (611) is provided on the second pipeline (610). In the second mode, the third mode and the fourth mode, the second expansion valve (611) is open. In the first mode, the second expansion valve (611) is closed.

7. The heat pump air-conditioning system according to claim 6, wherein The third pipeline (510) is provided with a third expansion valve (511). In the first mode, the second mode, and the fourth mode, the third expansion valve (511) is open, and in the third mode, the third expansion valve (511) is closed.

8. The heat pump air conditioning system according to claim 5, characterized in that, The control valve (300) is a second four-way valve (310). In the first mode, the third mode, and the fourth mode, the first passage of the second four-way valve (310) and the first passage of the first four-way valve (200) are in parallel at the outlet of the compressor (100), and the second passage of the second four-way valve (310) and the second passage of the first four-way valve (200) are in parallel at the inlet of the compressor (100). In the second mode, the fourth passage of the second four-way valve (310) and the fourth passage of the first four-way valve (200) are in parallel at the outlet of the compressor (100), and the third passage of the second four-way valve (310) and the third passage of the first four-way valve (200) are in parallel at the inlet of the compressor (100).

9. The heat pump air conditioning system according to claim 5, characterized in that, The control valve (300) is a second two-way valve (320). In the first mode, the third mode, and the fourth mode, the second two-way valve (320) and the first passage of the first four-way valve (200) are in parallel at the outlet of the compressor (100), and in the second mode, the second two-way valve (320) and the fourth passage of the first four-way valve (200) are in parallel at the outlet of the compressor (100).

10. The heat pump air conditioning system according to claim 7, characterized in that, It further includes a controller, and the controller is adapted to control the opening degrees of the first expansion valve (421), the second expansion valve (611), and the third expansion valve (511).

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