Air conditioning system

Abstract

The utility model discloses an air conditioning system, which belongs to the technical field of air conditioners and comprises an outdoor heat exchanger, a compressor, a first expansion valve, a four-way valve, a first heat exchanger, a water tank and a second heat exchanger, the outdoor heat exchanger is used for exchanging heat with outdoor air; the compressor is used for driving a refrigerant to flow; the first expansion valve is used for throttling a refrigerant passing through the first expansion valve; the four-way valve is used for switching the flow direction of a refrigerant; the first heat exchanger is used for exchanging heat with indoor air; the first heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a first refrigerant circulation loop through a pipeline; the second heat exchanger is used for exchanging heat with water in the water tank; the second heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a second refrigerant circulation loop through a pipeline; when the first heat exchanger is an evaporator, the compressor drives a part of refrigerant to flow into the first heat exchanger after flowing through the outdoor heat exchanger and the first expansion valve for throttling; the compressor drives the other part of refrigerant to flow into the first heat exchanger after flowing through the second heat exchanger; and the refrigerant flowing into the first heat exchanger flows back to the compressor.

Description

Technical Field

[0001] The present application belongs to the technical field of air conditioning, and in particular, relates to an air conditioning system. Background Art

[0002] Air conditioners and air source heat pump water heaters are household appliances commonly used by people. They all work by using the reverse Carnot cycle. Air source heat pump water heaters mainly use high-temperature and high-pressure refrigerant to exchange heat with water to achieve the purpose of heating water. They are usually operated for heating. The air conditioner achieves hot and cold conversion by switching the four-way valve and uses the indoor unit to achieve cooling and heating. When the air conditioner is used for heating, its working principle is similar to that of the air source heat pump water heater.

[0003] At present, heat pump water heaters and air conditioners are two products belonging to different industries, and they are implemented using different external units, which not only consumes high energy but also occupies more installation space.

[0004] In view of this, this application is filed. Utility Model Content

[0005] In response to the deficiencies in the related art, the present application provides an air-conditioning system, which integrates a heat exchange unit for heat exchange and a hot water unit that can provide hot water into the same air-conditioning system, so that the air-conditioning system can achieve both cooling or heating and hot water supply.

[0006] The present application provides an air conditioning system, comprising:

[0007] An outdoor heat exchanger, used for exchanging heat with outdoor air;

[0008] A compressor is used to drive the flow of refrigerant;

[0009] a first expansion valve, for throttling the refrigerant passing therethrough;

[0010] Four-way valve, used to switch the refrigerant flow direction;

[0011] The first heat exchanger is used to exchange heat with indoor air; the first heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a first refrigerant circulation loop through pipelines;

[0012] Water tank;

[0013] The second heat exchanger is used to exchange heat with the water in the water tank; the second heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a second refrigerant circulation loop through pipelines;

[0014] When the first heat exchanger is an evaporator, the compressor drives a part of the refrigerant to flow through the four-way valve and the outdoor heat exchanger in sequence, and then flows through the first expansion valve for throttling and then flows into the first heat exchanger; the compressor drives another part of the refrigerant to flow through the second heat exchanger and then flow into the first heat exchanger; wherein, the refrigerant flowing into the first heat exchanger flows back to the compressor.

[0015] This technical solution sets a first heat exchanger, and utilizes the refrigerant to flow in a first refrigerant circulation loop formed by the first heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger through pipelines to cool or heat the indoor environment; sets a second heat exchanger and a water tank, and utilizes the refrigerant to flow in a second refrigerant circulation loop formed by the second heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger through pipelines to heat the water in the water tank; the air-conditioning system can achieve both cooling or heating of the indoor environment and hot water supply, and when the air-conditioning system is cooling, the heat can be stored in the water tank through the second heat exchanger to achieve heat recovery and energy reuse.

[0016] In addition, the present application provides an air conditioning system, comprising:

[0017] An outdoor heat exchanger, used for exchanging heat with outdoor air;

[0018] A compressor is used to drive the flow of refrigerant;

[0019] a first expansion valve, for throttling the refrigerant passing therethrough;

[0020] Four-way valve, used to switch the refrigerant flow direction;

[0021] The first heat exchanger is used to exchange heat with indoor air; the first heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a first refrigerant circulation loop through pipelines;

[0022] a second expansion valve disposed in the first refrigerant circulation loop and located between the outdoor heat exchanger and the first heat exchanger;

[0023] Water tank;

[0024] The second heat exchanger is used to exchange heat with the water in the water tank; the second heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a second refrigerant circulation loop through pipelines;

[0025] a third expansion valve, which is disposed in the second refrigerant circulation loop and is located between the outdoor heat exchanger and the second heat exchanger;

[0026] When the first heat exchanger is an evaporator, the compressor drives a part of the refrigerant to flow through the four-way valve, the outdoor heat exchanger, the first expansion valve in sequence, and then to the second expansion valve. The compressor drives another part of the refrigerant to flow through the second heat exchanger, the third expansion valve in sequence, and then to the second expansion valve. The refrigerant flowing to the second expansion valve is throttled twice by the second expansion valve and then flows through the first heat exchanger back to the compressor.

[0027] This technical solution sets a first heat exchanger, and utilizes the refrigerant to flow in a first refrigerant circulation loop formed by the first heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger through pipelines to cool or heat the indoor environment; sets a second heat exchanger and a water tank, and utilizes the refrigerant to flow in a second refrigerant circulation loop formed by the second heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger through pipelines to heat the water in the water tank; the air-conditioning system can achieve both cooling or heating of the indoor environment and hot water supply, and when the air-conditioning system is cooling, the heat can be stored in the water tank through the second heat exchanger to achieve heat recovery and energy reuse.

[0028] In some embodiments, the first heat exchanger is connected to a first pipeline and a second pipeline, the first pipeline is connected to the compressor, and the second pipeline is connected to the first heat exchanger and the second heat exchanger; the first expansion valve is arranged in the second pipeline.

[0029] In some embodiments, the first heat exchanger is connected to a first branch, the second heat exchanger is connected to a second branch, and the first branch and the second branch are connected in parallel to an end of the second pipeline away from the outdoor heat exchanger.

[0030] In some embodiments, the first branch is provided with a second expansion valve, and the second branch is provided with a third expansion valve.

[0031] In some embodiments, the refrigerant outlet of the compressor is connected to a third pipeline, which is respectively connected to the outdoor heat exchanger, the first heat exchanger, and the second heat exchanger; the refrigerant inlet of the compressor is connected to a fourth pipeline, which is respectively connected to the outdoor heat exchanger and the first heat exchanger.

[0032] In some of the embodiments, a four-way valve is further included, which includes a first valve port, a second valve port, a third valve port and a fourth valve port. The first valve port is connected to an end of the fourth pipeline away from the compressor, the second valve port is connected to an end of the first pipeline away from the outdoor heat exchanger, and the third valve port is connected to an end of the third pipeline away from the compressor; the fourth valve port is connected to a fifth pipeline, and the fifth pipeline is connected to the first heat exchanger.

[0033] In some embodiments, the third valve port is connected to the sixth pipeline, the second heat exchanger is connected to the seventh pipeline, the seventh pipeline is arranged in parallel with the sixth pipeline, and the seventh pipeline and the sixth pipeline are connected in parallel to an end of the third pipeline away from the compressor.

[0034] In some embodiments, the seventh pipeline is connected to the eighth pipeline, and one end of the eighth pipeline away from the seventh pipeline is connected to the fourth pipeline.

[0035] In some of the embodiments, a first solenoid valve is provided in the seventh pipeline, and the first solenoid valve is located between the connecting point between the seventh pipeline and the eighth pipeline and the connecting point between the seventh pipeline and the third pipeline.

[0036] In the above embodiment, an air-conditioning system integrates a heat exchange unit for heat exchange and a hot water unit for providing hot water into the same air-conditioning system, so that the air-conditioning system can not only cool or heat the indoor environment, but also supply hot water. When the air-conditioning system is cooling, the heat can be stored in the water tank through the second heat exchanger to achieve heat recovery and energy reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The schematic diagram of a conventional air conditioning system in the prior art is shown;

[0038] Figure 2 The schematic diagram of the air source heat pump water heater in the prior art is shown;

[0039] Figure 3 The schematic diagram of a conventional one-to-many air conditioning system in the prior art is shown;

[0040] Figure 4 shows a schematic diagram of an air conditioning system according to some embodiments;

[0041] Figure 5 The flow path of the refrigerant when the heat exchange unit in the air-conditioning system is heating and the hot water unit is turned on and running according to some embodiments is shown;

[0042] Figure 6 The flow path of the refrigerant in the air-conditioning system when the heat exchange unit is heating and the hot water unit is on standby or shut down according to some embodiments is shown;

[0043] Figure 7 The flow path of the refrigerant when the heat exchange unit in the air-conditioning system is cooling and the hot water unit is turned on and running according to some embodiments is shown;

[0044] Figure 8 The flow path of the refrigerant in the air-conditioning system when the heat exchange unit is cooling and the hot water unit is on standby or shut down according to some embodiments is shown;

[0045] Fig. 9 The flow path of the refrigerant in the air-conditioning system when the hot water unit is running and the heat exchange unit is on standby or shut down according to other embodiments is shown;

[0046] Fig.10A schematic diagram showing an oil separator in an air conditioning system according to some embodiments is shown;

[0047] Fig.11 A schematic diagram of an outdoor unit after an oil separator is provided in an air conditioning system according to some embodiments is shown.

[0048] In the figure,

[0049] 100, outdoor heat exchanger; 200, four-way valve; 300, compressor; 400, first heat exchanger; 500, water module; 600, second heat exchanger; 700, water tank; 800, oil separator; 900, gas-liquid separator;

[0050] 110, first pipeline; 120, second pipeline; 121, first expansion valve;

[0051] 310, third pipeline; 320, fourth pipeline; 330, sixth pipeline;

[0052] 410, fifth pipeline; 420, first branch;

[0053] 411, a first stop valve; 421, a second stop valve; 422, a second expansion valve;

[0054] 610, seventh pipeline; 620, second branch; 630, eighth pipeline;

[0055] 611, third stop valve; 612, first solenoid valve; 621, fourth stop valve; 622, third expansion valve;

[0056] 810, ninth pipeline; 820, tenth pipeline; 811, second solenoid valve. DETAILED DESCRIPTION

[0057] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0058] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0059] The terms "first", "second", "third", etc. in the specification and claims of this application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances.

[0060] The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0061] The air conditioning system provided in the embodiments of the present application may have various implementation forms. For the convenience of description, the air conditioning system performs heating, which means that the heat exchange unit heats the indoor environment, and the heat exchange unit performs cooling, which means that the air conditioning system cools the indoor environment.

[0062] Figure 1 It is a schematic diagram of a common air conditioner in the prior art. The air conditioner includes a compressor 300, an outdoor heat exchanger 100, a first expansion valve 121, a first heat exchanger 400, and a four-way valve 200. The first heat exchanger 400 is used as an evaporator in cooling and as a condenser in heating.

[0063] Figure 2 This is a schematic diagram of an air source heat pump water heater in the prior art. The air source heat pump water heater system includes a compressor 300, an outdoor heat exchanger 100, a first expansion valve 121, a water tank 700, and a four-way valve 200. The water tank 700 contains a second heat exchanger 600. The high-pressure refrigerant flowing through the second heat exchanger 600 exchanges heat with water to increase the water temperature, thereby achieving the purpose of heating the water. It is only used for heating and is converted to cooling through the four-way valve 200 during outdoor defrosting.

[0064] Figure 3 It is a schematic diagram of a one-to-many air conditioning system in the prior art, which includes a compressor 300, an outdoor heat exchanger 100, a plurality of second expansion valves 422, a four-way valve 200, and a plurality of first heat exchangers 400. The second expansion valves 422 are connected in parallel and connected to the plurality of first heat exchangers 400. During cooling operation, the second expansion valves 422 corresponding to the working indoor units are opened for throttling, and the second expansion valves 422 of the non-working indoor units are closed. During heating operation, the second expansion valves 422 corresponding to the working indoor units are opened to maintain the throttling state, and the second expansion valves 422 corresponding to the working indoor units are opened to a relatively small opening to ensure the normal operation of the system.

[0065] Figure 4-Figure 11 This is a specific implementation of the air-conditioning system of the present application. The air-conditioning system includes an outdoor unit and an indoor unit. The outdoor unit is arranged outdoors, and the indoor unit is arranged indoors. The indoor unit and the outdoor unit cooperate with each other so that the indoor unit can cool or heat the indoor environment and provide hot water for users.

[0066] The outdoor unit includes an outdoor heat exchanger 100, which is used to exchange heat with outdoor air; a refrigerant for exchanging heat with air flows inside the outdoor heat exchanger 100; when the air-conditioning system is cooling, the outdoor heat exchanger 100 works as a condenser; when the air-conditioning system is heating, the outdoor heat exchanger 100 works as an evaporator.

[0067] The outdoor heat exchanger 100 includes a first interface. When the outdoor heat exchanger 100 works as a condenser, the refrigerant flows into the outdoor heat exchanger 100 through the first interface; when the outdoor heat exchanger 100 works as an evaporator, the refrigerant flows out of the outdoor heat exchanger 100 through the first interface.

[0068] The outdoor heat exchanger 100 includes a second interface. When the outdoor heat exchanger 100 works as a condenser, the refrigerant flows out of the outdoor heat exchanger 100 through the second interface; when the outdoor heat exchanger 100 works as an evaporator, the refrigerant flows into the outdoor heat exchanger 100 through the second interface.

[0069] The first interface is connected to the first pipeline 110 , the second interface is connected to the second pipeline 120 , and the outdoor heat exchanger 100 is connected to the indoor unit through the second pipeline 120 .

[0070] The outdoor unit includes a compressor 300, which is used to compress the refrigerant gas in a low-temperature and low-pressure state into a refrigerant gas in a high-temperature and high-pressure state. The compressor 300 provides power for the circulation of the refrigerant in the pipeline.

[0071] The compressor 300 includes a refrigerant inlet, and the refrigerant in a low-temperature and low-pressure state enters the compressor 300 through the refrigerant inlet.

[0072] The compressor 300 includes a refrigerant outlet, and the refrigerant in a low-temperature and low-pressure state is compressed into a refrigerant in a high-temperature and high-pressure state and then output from the compressor 300 through the refrigerant outlet.

[0073] The refrigerant outlet is connected to the third pipeline 310 so that the refrigerant in a high-temperature and high-pressure state flows from the third pipeline 310 to the outdoor heat exchanger 100 or the indoor unit.

[0074] The refrigerant inlet is connected to a fourth pipeline 320 , so that the refrigerant in a low-temperature and low-pressure state flows back to the compressor 300 through the fourth pipeline 320 .

[0075] The outdoor unit includes a gas-liquid separator 900 , which is used to separate the refrigerant into gas and liquid; the gas-liquid separator 900 is disposed in the fourth pipeline 320 .

[0076] The gas-liquid separator 900 separates the refrigerant returning from the evaporator to the compressor 300 into gas and liquid, and returns only the gas to the compressor 300, thereby preventing the liquid phase refrigerant from entering the compressor 300 and preventing the compressor 300 from liquid hammer.

[0077] like Fig.10 and Fig.11 As shown, the outdoor unit may include an oil separator 800, and the oil separator 800 is used to separate the lubricating oil in the refrigerant discharged from the compressor 300. The oil separator 800 is disposed in the third pipeline 310.

[0078] The third pipeline 310 is connected to the ninth pipeline 810 . One end of the ninth pipeline 810 away from the third pipeline 310 is in communication with the fourth pipeline 320 . A second solenoid valve 811 is disposed in the ninth pipeline 810 .

[0079] The oil separator 800 is connected to a tenth pipeline 820 , and one end of the tenth pipeline 820 away from the oil separator 800 is connected to the third pipeline 310 . The lubricating oil separated by the oil separator 800 can be guided to the gas-liquid separator 900 through the tenth pipeline 820 and the fourth pipeline 320 .

[0080] Capillaries are respectively provided in the ninth pipeline 810 .

[0081] Capillaries are respectively disposed in the tenth pipeline 820 .

[0082] The air conditioning system includes a first expansion valve 121, and the first expansion valve 121 is used to throttle the refrigerant passing through it. The refrigerant in a high-pressure state is converted into a low-pressure refrigerant after throttling through the first expansion valve 121.

[0083] It should be noted that the first expansion valve 121 may be provided in the indoor unit or in the outdoor unit.

[0084] The indoor unit includes a heat exchange unit, which is used to cool or heat the indoor environment.

[0085] The heat exchange unit includes a first heat exchanger 400, which is used to exchange heat with indoor air. A refrigerant for exchanging heat with air flows inside the first heat exchanger 400; when the air conditioning system is cooling, the first heat exchanger 400 works as an evaporator; when the air conditioning system is heating, the first heat exchanger 400 works as a condenser.

[0086] The compressor 300, the outdoor heat exchanger 100, the first expansion valve 121 and the first heat exchanger 400 form a first refrigerant circulation loop through pipelines. The refrigerant flows in the first refrigerant circulation loop to cool or heat the indoor environment, so that the heat exchange unit works.

[0087] When the heat exchange unit is in heating mode, the refrigerant compressed by the compressor 300 flows into the indoor unit, exchanges heat with the indoor air, flows into the outdoor heat exchanger 100 to exchange heat with the outdoor air, and then flows back to the compressor 300. The refrigerant circulates among the compressor 300, the first heat exchanger 400, the outdoor heat exchanger 100, and the compressor 300.

[0088] When the heat exchange unit is in cooling mode, the refrigerant compressed by the compressor 300 flows into the outdoor heat exchanger 100 to exchange heat with the outdoor air, flows into the indoor unit to exchange heat with the indoor air, and then flows back to the compressor 300. The refrigerant circulates among the compressor 300, the outdoor heat exchanger 100, the first heat exchanger 400, and the compressor 300.

[0089] Since the refrigerant flow paths are different when the air-conditioning system is cooling and heating, in order to ensure the reliability of the refrigerant flow, the outdoor unit includes a four-way valve 200, which is used to switch the refrigerant flow direction.

[0090] Specifically, the four-way valve 200 includes a first valve port s, which is connected to a fourth pipeline 320 , which is connected to the refrigerant outlet of the compressor 300 , so that the refrigerant in a low-temperature and low-pressure state can flow back to the compressor 300 from the fourth pipeline 320 through the first valve port s.

[0091] The four-way valve 200 includes a second valve port c, which is connected to a first pipeline 110. The first pipeline 110 is connected to the outdoor heat exchanger 100 so that the refrigerant flowing out of the compressor 300 flows from the first pipeline 110 to the outdoor heat exchanger 100 through the second valve port c, or flows from the first pipeline 110 to the compressor 300 through the second valve port c.

[0092] The four-way valve 200 includes a third valve port d, which is connected to a sixth pipeline 330 . The sixth pipeline 330 is connected to the refrigerant inlet of the compressor 300 , so that the high-temperature and high-pressure refrigerant flows out of the compressor 300 through the sixth pipeline 330 from the third valve port d.

[0093] The four-way valve 200 includes a fourth valve port e, which is connected to a fifth pipeline 410. The fifth pipeline 410 is connected to the first heat exchanger 400, so that the refrigerant in a high-temperature and high-pressure state flows from the fifth pipeline 410 to the first heat exchanger 400 through the fourth valve port e, or the refrigerant in a low-temperature and low-pressure state flows from the fifth pipeline 410 to the compressor 300 through the fourth valve port e.

[0094] The indoor unit includes a hot water unit, which is used to provide domestic hot water for users.

[0095] The hot water unit includes a water tank 700 , in which domestic water is stored.

[0096] The hot water unit includes a second heat exchanger 600, which is used to exchange heat with water in a water tank 700. A refrigerant for exchanging heat with water flows inside the second heat exchanger 600, and the second heat exchanger 600 usually works as a condenser.

[0097] The hot water unit includes a water use module 500. The user uses the water in the water tank 700 through the water use module 500, and the consumed part of the water in the water tank 700 will be replenished into the water tank 700 in the form of cold water. This is a conventional technical means in the field and will not be repeated here.

[0098] The compressor 300, the outdoor heat exchanger 100, the first expansion valve 121 and the second heat exchanger 600 form a second refrigerant circulation loop through pipelines. The refrigerant flows in the second refrigerant circulation loop to heat cold water into hot water, so that the hot water unit works.

[0099] The first refrigerant circulation loop and the second refrigerant circulation loop share the compressor 300, the outdoor heat exchanger 100 and the first expansion valve 121, so as to simplify the overall structure of the air-conditioning system and facilitate installation and layout.

[0100] The first heat exchanger 400 and the second heat exchanger 600 are arranged in parallel so that the refrigerant can flow in the first refrigerant circulation loop or the second refrigerant circulation loop alone, thereby realizing independent operation of the heat exchange unit and the hot water unit.

[0101] In order to facilitate the outdoor heat exchanger 100 to be connected to the first heat exchanger 400 and the second heat exchanger 600 at the same time, the end of the second pipeline 120 away from the outdoor heat exchanger 100 is connected to the first branch 420 and the second branch 620. The first branch 420 and the second branch 620 are arranged in parallel. The first branch 420 is connected to the first heat exchanger 400, and the second branch 620 is connected to the second heat exchanger 600.

[0102] By configuring the water tank 700 in the indoor unit, the second heat exchanger 600 located inside the water tank 700 is connected to the refrigerant outlet of the compressor 300 through the seventh pipeline 610, so that the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 300 can enter the second heat exchanger 600 through the seventh pipeline 610, and heat the domestic water stored in the water tank 700 through the second heat exchanger 600. The domestic water stored in the water tank 700 is heated by the heat of the refrigerant, the use of the water heater is eliminated, the energy consumption is reduced, and the installation space is saved.

[0103] The first expansion valve 121 is disposed in the second pipeline 120 , so that the first expansion valve 121 can throttle the refrigerant flowing through the first heat exchanger 400 and the second heat exchanger 600 .

[0104] The first heat exchanger 400 includes a third interface, which is connected to the fifth pipeline 410. When the first heat exchanger 400 is an evaporator, the refrigerant flows out of the first heat exchanger 400 through the third interface. When the first heat exchanger 400 is a condenser, the refrigerant flows into the first heat exchanger 400 through the third interface.

[0105] The first heat exchanger 400 includes a fourth interface, which is connected to the first branch 420. When the first heat exchanger 400 is an evaporator, the refrigerant flows into the first heat exchanger 400 through the fourth interface. When the first heat exchanger 400 is a condenser, the refrigerant flows out of the first heat exchanger 400 through the fourth interface.

[0106] The second heat exchanger 600 includes a fifth interface, the fifth interface is connected to a seventh pipeline 610, the seventh pipeline 610 is connected to the refrigerant outlet of the compressor 300, and the refrigerant flows into the second heat exchanger 600 from the fifth interface.

[0107] The second heat exchanger 600 includes a sixth interface, which is connected to the second branch 620 , and the refrigerant flows out of the second heat exchanger 600 through the sixth interface.

[0108] In some embodiments, the fifth pipeline 410 is connected to a first stop valve 411 , and the first stop valve 411 is used to control the on-off of the fifth pipeline 410 .

[0109] In some embodiments, the first branch 420 is connected to a second stop valve 421 , and the second stop valve 421 is used to control the on-off of the first branch 420 .

[0110] In some embodiments, the seventh pipeline 610 is connected to a third stop valve 611 , and the third stop valve 611 is used to control the on-off of the seventh pipeline 610 .

[0111] In some embodiments, the second branch 620 is connected to a fourth stop valve 621 , and the fourth stop valve 621 is used to control the on-off of the second branch 620 .

[0112] In some embodiments, the first branch 420 is connected to a second expansion valve 422 , and the second expansion valve 422 is used to throttle the refrigerant passing therethrough.

[0113] In other embodiments, the second expansion valve 422 is located between the second stop valve 421 and the connection between the first branch 420 and the second pipeline 120 .

[0114] In some embodiments, the second branch 620 is connected to a third expansion valve 622, and the third expansion valve 622 is used to throttle the refrigerant passing through it.

[0115] In other embodiments, the third expansion valve 622 is located between the fourth stop valve 621 and the connection between the second branch 620 and the second pipeline 120 .

[0116] In some embodiments, a plurality of first heat exchangers 400 are provided, and the plurality of first heat exchangers 400 are arranged in parallel to increase the heat exchange effect of the heat exchange unit.

[0117] It should be noted that the multiple first heat exchangers 400 can be set in different rooms or in different locations in the same room.

[0118] Since the high-temperature and high-pressure refrigerant output by the compressor 300 is split into two paths, one path of refrigerant enters the second heat exchanger 600, and the other path of refrigerant enters the first heat exchanger 400 when the heat exchange unit is heating, and enters the outdoor heat exchanger 100 when the heat exchange unit is cooling.

[0119] In order to facilitate the connection between the compressor 300 and the seventh pipeline 610 and the sixth pipeline 330, one end of the third pipeline 310 away from the compressor 300 is connected to the seventh pipeline 610 and the sixth pipeline 330. The seventh pipeline 610 and the sixth pipeline 330 are arranged in parallel.

[0120] The seventh pipeline 610 is connected to the eighth pipeline 630 , and one end of the eighth pipeline 630 away from the seventh pipeline 610 is in communication with the fourth pipeline 320 , so that the refrigerant in the seventh pipeline 610 can flow back to the compressor 300 along the fourth pipeline 320 through the eighth pipeline 630 .

[0121] In some embodiments, the seventh pipeline 610 is connected to a first solenoid valve 612 , and the first solenoid valve 612 is used to control the flow direction of the refrigerant in the seventh pipeline 610 and the opening and closing of the seventh pipeline 610 .

[0122] In other embodiments, the first solenoid valve 612 is located between the third stop valve 611 , the connecting point of the seventh pipeline 610 and the eighth pipeline 630 .

[0123] like Figure 5 As shown, the heat exchange unit and the hot water unit in the above air-conditioning system operate simultaneously, and the working principle of the heat exchange unit for heating is:

[0124] The compressor 300 drives the refrigerant to flow along the third pipeline 310 and divides the refrigerant into two parts, one part enters the hot water unit along the seventh pipeline 610, and the other part enters the heat exchange unit along the fifth pipeline 410.

[0125] The refrigerant entering the hot water unit flows along the seventh pipeline 610 to the second heat exchanger 600 , exchanges heat with the water in the water tank 700 , flows along the second branch 620 , and flows into the second pipeline 120 after being throttled by the third expansion valve 622 .

[0126] The refrigerant entering the heat exchange unit flows along the fifth pipeline 410 to the first heat exchanger 400 , exchanges heat with the indoor air, flows along the first branch 420 , and flows into the second pipeline 120 after being throttled by the second expansion valve 422 .

[0127] The refrigerant flowing into the second pipeline 120 flows into the outdoor heat exchanger 100 after secondary throttling by the first expansion valve 121, flows along the first pipeline 110 to the four-way valve 200, passes through the second valve port c and the first valve port s, and flows back to the compressor 300 along the fourth pipeline 320.

[0128] like Figure 6 As shown, the working principle of the heat exchange unit in the above air-conditioning system when it is running for heating and the hot water unit is shut down or on standby is as follows:

[0129] The compressor 300 drives the refrigerant to flow along the third pipeline 310 and enter the heat exchange unit along the fifth pipeline 410. The refrigerant entering the heat exchange unit flows along the fifth pipeline 410 to the first heat exchanger 400, and flows into the second pipeline 120 along the first branch 420 after heat exchange with the indoor air; the refrigerant flowing into the second pipeline 120 flows into the outdoor heat exchanger 100 after throttling by the first expansion valve 121, and flows along the first pipeline 110 to the four-way valve 200, passes through the second valve port c and the first valve port s, and then flows back to the compressor 300 along the fourth pipeline 320.

[0130] like Figure 7 As shown, the heat exchange unit and the hot water unit in the above air-conditioning system operate simultaneously, and the working principle of the heat exchange unit for cooling is:

[0131] The compressor 300 drives the refrigerant to flow along the third pipeline 310 and divides the refrigerant into two parts, one part enters the hot water unit along the seventh pipeline 610 , and the other part enters the outdoor heat exchanger 100 along the first pipeline 110 .

[0132] The refrigerant entering the hot water unit flows along the seventh pipeline 610 to the second heat exchanger 600 , exchanges heat with the water in the water tank 700 , flows along the second branch 620 , and flows into the second pipeline 120 after being throttled by the third expansion valve 622 .

[0133] The refrigerant entering the outdoor heat exchanger 100 flows along the second pipeline 120 and passes through the first expansion valve 121 for throttling before flowing into the first branch 420 .

[0134] The refrigerant flowing into the second pipeline 120 from the second branch 620 also enters the first branch 420 and flows into the first heat exchanger 400 after being throttled by the second expansion valve 422. After exchanging heat with the indoor air, it flows along the fifth pipeline 410 to the four-way valve 200, passes through the fourth valve port e and the first valve port s of the four-way valve 200, and then flows back to the compressor 300 through the fourth pipeline 320.

[0135] It should be noted that when the refrigerant is split, most of the refrigerant enters the hot water unit along the seventh pipeline 610 , and a small amount of the refrigerant enters the outdoor heat exchanger 100 along the first pipeline 110 .

[0136] The first expansion valve 121 maintains a relatively small opening, and the main flow of the refrigerant is at the third expansion valve 622. Most of the high-pressure liquid refrigerant is throttled and reduced in pressure by the second expansion valve 422 to become a low-pressure liquid refrigerant.

[0137] like Figure 8 As shown, the working principle of the heat exchange unit in the above air-conditioning system when it is running for cooling and the hot water unit is shut down or on standby is as follows:

[0138] The compressor 300 drives the refrigerant to flow along the third pipeline 310 and enter the heat exchange unit along the fifth pipeline 410. The refrigerant entering the heat exchange unit flows along the fifth pipeline 410 to the first heat exchanger 400, and flows into the second pipeline 120 along the first branch 420 after heat exchange with the indoor air; the refrigerant flowing into the second pipeline 120 flows into the outdoor heat exchanger 100 after throttling by the first expansion valve 121, and flows along the first pipeline 110 to the four-way valve 200, passes through the second valve port c and the first valve port s, and then flows back to the compressor 300 along the fourth pipeline 320.

[0139] like Fig. 9 As shown, the working principle of the above air conditioning system hot water unit when it is running and the heat exchange unit is shut down or in standby is as follows:

[0140] The compressor 300 drives the refrigerant to flow along the third pipeline 310 and enter the hot water unit along the seventh pipeline 610, and the other part enters the heat exchange unit along the fifth pipeline 410. The refrigerant entering the hot water unit flows along the seventh pipeline 610 to the second heat exchanger 600, exchanges heat with the water in the water tank 700, and flows along the second branch 620, and flows into the second pipeline 120 after throttling by the third expansion valve 622. The refrigerant flowing into the second pipeline 120 flows into the outdoor heat exchanger 100 after secondary throttling by the first expansion valve 121, and flows along the first pipeline 110 to the four-way valve 200, passes through the second valve port c and the first valve port s, and flows back to the compressor 300 along the fourth pipeline 320.

[0141] When the indoor environment does not require cooling or heating, the heat exchange unit is in a shutdown or standby state. When hot water is not needed, the hot water system is in a shutdown or standby state.

[0142] In some embodiments, when the heat exchange unit is in shutdown or standby mode, the first stop valve 411 in the fifth pipeline 410 and the second stop valve 421 in the first branch 420 are closed to prevent the refrigerant from flowing through the first heat exchanger 400 .

[0143] In other embodiments, when the heat exchange unit is in shutdown or standby mode, the second expansion valve 422 in the first branch 420 is closed.

[0144] In some other embodiments, when the heat exchange unit is in shutdown or standby mode, the second expansion valve 422 in the first branch 420 is opened to a smaller degree to balance the gas pressure in the pipeline connected to the first heat exchanger 400 .

[0145] It should be noted that when some of the first heat exchangers 400 are working and some of the first heat exchangers 400 are in the shutdown or standby state, since the first heat exchangers 400 are arranged in parallel with each other, it is only necessary to close the relevant valves in the pipeline connected to the first heat exchanger 400 in the shutdown or standby state to prevent the refrigerant from flowing through the first heat exchanger 400 in the shutdown or standby state.

[0146] In some embodiments, when the hot water unit is turned off or in standby mode, the first solenoid valve 612 in the seventh pipeline 610 is closed.

[0147] In some embodiments, when the hot water unit is turned off or in standby mode, the third stop valve 611 in the seventh pipeline 610 is closed.

[0148] In some embodiments, when the hot water unit is turned off or in standby mode, the fourth stop valve 621 in the second branch 620 is closed.

[0149] In some embodiments, when the hot water unit is turned off or in standby mode, the third expansion valve 622 in the seventh pipeline 610 is closed.

[0150] It should be noted that when the hot water unit is turned off or on standby, a part of the capillary tube in the eighth pipeline 630 unloads the high-temperature and high-pressure gaseous refrigerant to ensure the normal circulation of the system, realize indoor cooling and heating in the water tank 700, and release the heat absorbed from the indoor room into the water tank 700 to heat the water. The whole system realizes heat recovery operation, which is energy-saving and efficient.

[0151] The above-mentioned air-conditioning system is based on an ordinary one-to-many air-conditioning system. By configuring a water tank 700 and a second heat exchanger 600, the ordinary air-conditioning cooling and heating and the air source water heater hot water heating are integrated into one system, which reduces equipment costs, reduces installation space, and realizes energy reuse through heat recovery, thereby greatly improving economy.

[0152] In the above air-conditioning system, the heat exchange unit can realize cooling and the hot water unit can produce hot water, realizing the heat recovery function; the heat exchange unit can operate cooling or heating alone, or it can be mixed with the hot water unit for operation. The multiple operation modes are convenient and flexible to meet the actual needs of users.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0154] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. An air conditioning system, characterized in that: include: An outdoor heat exchanger, used for exchanging heat with outdoor air; A compressor is used to drive the flow of refrigerant; a first expansion valve, for throttling the refrigerant passing therethrough; Four-way valve, used to switch the refrigerant flow direction; A first heat exchanger is used for exchanging heat with indoor air; the first heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a first refrigerant circulation loop through pipelines; Water tank; A second heat exchanger is used for exchanging heat with the water in the water tank; the second heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a second refrigerant circulation loop through pipelines; When the first heat exchanger is an evaporator, the compressor drives a part of the refrigerant to flow through the four-way valve and the outdoor heat exchanger in sequence, and then flows through the first expansion valve for throttling and then flows into the first heat exchanger; the compressor drives another part of the refrigerant to flow through the second heat exchanger and then flow into the first heat exchanger; wherein the refrigerant flowing into the first heat exchanger flows back to the compressor.

2. An air conditioning system, characterized in that: include: An outdoor heat exchanger, used for exchanging heat with outdoor air; A compressor is used to drive the flow of refrigerant; a first expansion valve, for throttling the refrigerant passing therethrough; Four-way valve, used to switch the refrigerant flow direction; A first heat exchanger is used for exchanging heat with indoor air; the first heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a first refrigerant circulation loop through pipelines; a second expansion valve, which is disposed in the first refrigerant circulation loop and located between the outdoor heat exchanger and the first heat exchanger; Water tank; A second heat exchanger is used for exchanging heat with the water in the water tank; the second heat exchanger, the compressor, the first expansion valve and the outdoor heat exchanger form a second refrigerant circulation loop through pipelines; a third expansion valve, which is disposed in the second refrigerant circulation loop and is located between the outdoor heat exchanger and the second heat exchanger; When the first heat exchanger is an evaporator, the compressor drives a part of the refrigerant to flow through the four-way valve, the outdoor heat exchanger, and the first expansion valve in sequence, and then flows to the second expansion valve. The compressor drives another part of the refrigerant to flow through the second heat exchanger and the third expansion valve in sequence, and then flows to the second expansion valve. The refrigerant flowing to the second expansion valve is throttled twice by the second expansion valve and then flows through the first heat exchanger and returns to the compressor.

3. The air conditioning system according to claim 1 or 2, characterized in that: The first heat exchanger is connected to a first pipeline and a second pipeline. The first pipeline is in communication with the compressor, and the second pipeline is in communication with the first heat exchanger and the second heat exchanger. The first expansion valve is disposed in the second pipeline.

4. The air conditioning system according to claim 3, characterized in that: The first heat exchanger is connected to a first branch, the second heat exchanger is connected to a second branch, and the first branch and the second branch are connected in parallel to an end of the second pipeline away from the outdoor heat exchanger.

5. The air conditioning system according to claim 4, characterized in that: The first branch is provided with a second expansion valve, and the second branch is provided with a third expansion valve.

6. The air conditioning system according to claim 3, characterized in that: The refrigerant outlet of the compressor is connected to a third pipeline, and the third pipeline is respectively connected to the outdoor heat exchanger, the first heat exchanger, and the second heat exchanger; the refrigerant inlet of the compressor is connected to a fourth pipeline, and the fourth pipeline is respectively connected to the outdoor heat exchanger and the first heat exchanger.

7. The air conditioning system according to claim 6, characterized in that: It also includes a four-way valve, which includes a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port is connected to an end of the fourth pipeline away from the compressor, the second valve port is connected to an end of the first pipeline away from the outdoor heat exchanger, and the third valve port is connected to an end of the third pipeline away from the compressor; the fourth valve port is connected to a fifth pipeline, and the fifth pipeline is connected to the first heat exchanger.

8. The air conditioning system according to claim 7, characterized in that: The third valve port is connected to a sixth pipeline, the second heat exchanger is connected to a seventh pipeline, the seventh pipeline is arranged in parallel with the sixth pipeline, and the seventh pipeline and the sixth pipeline are connected in parallel to an end of the third pipeline away from the compressor.

9. The air conditioning system according to claim 8, characterized in that: The seventh pipeline is connected to the eighth pipeline, and one end of the eighth pipeline away from the seventh pipeline is connected to the fourth pipeline.

10. The air conditioning system according to claim 9, characterized in that: A first solenoid valve is provided in the seventh pipeline, and the first solenoid valve is located between the connecting point between the seventh pipeline and the eighth pipeline and the connecting point between the seventh pipeline and the third pipeline.

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