Air conditioner waste heat recovery device

Abstract

The invention discloses an air conditioner waste heat recovery device, which relates to the air conditioner waste heat recovery technology and comprises a compressor, a first four-way valve, a heat exchange water tank, a first one-way valve, a first tee joint, a second four-way valve, an air conditioner main body, a second tee joint and a third tee joint which are sequentially connected end to end through pipelines to form a refrigeration and heating water circulation. According to the air conditioner waste heat recovery device, when water in the heat exchange water tank is heated through waste heat of an air conditioner, a refrigerant flows through the first four-way valve and the second four-way valve, in the system operation process, the first four-way valve and the second four-way valve do not need to be switched frequently, abrasion can be reduced, the phenomena of untight sealing and even air leakage are avoided as much as possible, and the service life of the air conditioner is prolonged. The situation that the first four-way valve and the second four-way valve are burnt out at high temperature can be avoided, more electromagnetic valves can be prevented from being used in cooperation with the pipeline design of the energy-saving air-conditioning water heater system, work is more reliable, and the whole energy-saving air-conditioning water heater system runs more reliably.

Description

Technical Field

[0001] The invention relates to air conditioner waste heat recovery technology, and in particular to an air conditioner waste heat recovery device. Background Art

[0002] The existing heat pump water heater and air conditioner have separate functions. In addition to installing air conditioners, users generally purchase an additional heat pump water heater, or rely on solar water heaters, gas water heaters, electric water heaters and boilers to heat hot water, which not only increases household expenses, but also takes up more indoor space. In the prior art, there is already technology that combines heat pump water heaters with air conditioners, but in terms of products, due to the high failure and maintenance rate of air conditioner water heaters, they cannot adapt to market use, so there is no mature product.

[0003] For example, the patent with the authorization announcement number CN219037126U and the authorization announcement date May 16, 2023, and the name of the patent for online control system for air conditioner and water heater, includes: air conditioner and water heater, the air conditioner includes a compressor, a four-way valve, an outdoor heat exchanger, a first throttle valve and an indoor heat exchanger, the first valve port of the four-way valve is connected to the exhaust port of the compressor, the second valve port of the four-way valve is connected to the indoor heat exchanger, the third valve port of the four-way valve is connected to the return air port of the compressor, the fourth valve port of the four-way valve is connected to the outdoor heat exchanger, and the first throttle valve is connected between the outdoor heat exchanger and the indoor heat exchanger; the water heater includes a heat exchanger, the first end of the heat exchanger is connected between the outdoor heat exchanger and the first throttle valve, the second end of the heat exchanger is connected to an on-off control valve, and the on-off control valve is respectively connected to the second valve port and the fourth valve port of the four-way valve. This patent can save electricity, reduce electricity costs, and improve user experience by using the air conditioner and the water heater together.

[0004] In the above patent, there are nine operating modes in total. Among these nine operating modes, four modes are that the first valve port and the second valve port are connected, and five modes are that the first valve port and the fourth valve port are connected. There are 20 situations when switching from the connection between the first valve port and the second valve port to the connection between the first valve port and the fourth valve port. There are also 20 situations when switching from the connection between the first valve port and the fourth valve port to the connection between the first valve port and the second valve port. In order to meet different working conditions, a single four-way valve needs to switch the operating mode frequently, which requires the four-way valve to frequently switch to different valve ports. In this process, the main slide valve in the four-way valve structure needs to slide frequently in the valve body. Other connection structures in the prior art are similar, and their operating conditions generally exceed five or more. Frequent sliding of the main slide valve will lead to accelerated wear, and it is also easy to have poor sealing or even air leakage, which shortens the life of the four-way valve and causes malfunctions in the air conditioning water heater system. Summary of the invention

[0005] The object of the present invention is to provide an air conditioner waste heat recovery device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An air conditioner waste heat recovery device includes a compressor, a first four-way valve, a heat exchange water tank, a first non-return valve, a first three-way valve, a second four-way valve, an air conditioner body, a second three-way valve and a third three-way valve, which are connected end to end through pipelines to form a cooling and hot water circulation; it also includes a heat exchanger, a fourth three-way valve, a second non-return valve and a third non-return valve, the first four-way valve is also connected to the heat exchanger, the heat exchanger is connected to the fourth three-way valve, the fourth three-way valve is connected to the first three-way valve through the second non-return valve, and the fourth three-way valve is connected to the second four-way valve through the third non-return valve.

[0008] In the above-mentioned air-conditioning waste heat recovery device, a first throttling device is further connected between the second four-way valve and the air-conditioning body, and the second throttling device is used to reduce the pressure and temperature of the refrigerant.

[0009] In the above-mentioned air-conditioning waste heat recovery device, the first four-way valve and the second four-way valve each include a main inlet, a first outlet, a second outlet and a third outlet; the main inlet of the first four-way valve is connected to the exhaust port of the compressor, the first outlet of the first four-way valve is connected to the heat exchange water tank, and the third outlet of the first four-way valve is connected to the heat exchanger; the first outlet of the second four-way valve is connected to the air-conditioning body.

[0010] In the above-mentioned air-conditioning waste heat recovery device, the first three-way, second three-way, third three-way and fourth three-way all include a main interface, a first branch port and a second branch port; the first branch port of the first three-way is connected to the heat exchange water tank, the second branch port of the first three-way is connected to the first branch port of the fourth three-way, and the main interface of the first three-way is connected to the main inlet of the second four-way valve; the first branch port of the second three-way is connected to the air-conditioning body, the second branch port of the second three-way is connected to the second outlet of the second four-way valve, and the main interface of the second three-way is connected to the first branch port of the third three-way; the second branch port of the third three-way is connected to the second outlet of the first four-way valve, and the main interface of the third three-way is connected to the air inlet of the compressor; the second branch port of the fourth three-way is connected to the third outlet of the second four-way valve, and the main interface of the fourth three-way is connected to the heat exchanger.

[0011] In the above-mentioned air-conditioning waste heat recovery device, when in the cooling and hot water making mode, the refrigerant flows through the compressor, the first four-way valve main inlet, the first four-way valve first outlet, the heat exchange water tank, the first one-way valve, the first three-way first branch port, the first three-way main interface, the second four-way valve main interface, the second four-way valve first outlet, the air-conditioning body, the second three-way first branch port, the second three-way main interface, the third three-way first branch port and the third three-way main interface, and finally returns to the compressor.

[0012] In the above-mentioned air-conditioning waste heat recovery device, when in cooling mode, the refrigerant flows through the compressor, the first four-way valve main inlet, the first four-way valve third outlet, the heat exchanger, the fourth three-way main interface, the fourth three-way first branch port, the first three-way second branch port, the first three-way main interface, the second four-way valve main inlet, the second four-way valve first outlet, the air-conditioning body, the second three-way first branch port, the second three-way main interface, the third three-way first branch port and the third three-way main interface, and finally returns to the compressor.

[0013] In the above-mentioned air-conditioning waste heat recovery device, when in the hot water making mode, the refrigerant flows through the compressor, the first four-way valve main inlet, the first four-way valve first outlet, the heat exchanger tank, the first one-way valve, the first three-way first branch port, the first three-way main interface, the second four-way valve main interface, the second four-way valve third outlet, the second four-way valve main interface, the fourth three-way second branch port, the heat exchanger, the first four-way valve third outlet, the first four-way valve second outlet, the third three-way second branch port and the third three-way main interface, and finally returns to the compressor.

[0014] In the above-mentioned air-conditioning waste heat recovery device, the heat exchange water tank includes a water storage barrel, a heat exchange medium is arranged in the water storage barrel, the first outlet of the first four-way valve is connected to the heat exchange medium, and the water storage barrel is also filled with liquid.

[0015] In the above-mentioned air-conditioning waste heat recovery device, a second throttling device is also connected between the second four-way valve and the second one-way valve, and the second throttling device is used to reduce the pressure and temperature of the refrigerant.

[0016] In the above-mentioned air conditioning waste heat recovery device, in the cooling and hot water making mode, the second outlet of the second four-way valve is partially connected to the second branch outlet of the second three-way valve, and part of the refrigerant flows back to the third three-way valve through the second outlet of the second four-way valve and finally flows back to the compressor.

[0017] In the above technical scheme, the present invention provides an air-conditioning waste heat recovery device, including three modes, a cooling and hot water making mode, a cooling mode and a hot water making mode. No matter which working mode it is in, the refrigerant needs to flow through the first four-way valve and the second four-way valve. However, when these three modes are switched with each other, sometimes only the pipeline in the first four-way valve or the second four-way valve needs to be switched. The two four-way valves reduce the frequent switching of a single four-way valve, and the first four-way valve and the second four-way valve do not need to switch the pipeline frequently at the same time, which can reduce wear and tear, and avoid the phenomenon of poor sealing or even air leakage as much as possible, and avoid the situation where the first four-way valve and the second four-way valve are burned out at high temperature. Combined with the pipeline design of the energy-saving air-conditioning water heater system, it can avoid the use of more solenoid valves and use the first one-way valve, the second one-way valve or the third one-way valve in the system. The first one-way valve, the second one-way valve or the third one-way valve do not need to be energized, are not easy to be damaged, and work more reliably, making the entire energy-saving air-conditioning water heater system more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A structural block diagram of an air-conditioning waste heat recovery device provided in one embodiment of the present invention.

[0020] Figure 2 This is a structural block diagram of an air conditioning waste heat recovery device in cooling and hot water making mode provided by an embodiment of the present invention.

[0021] Figure 3 A structural block diagram of an air-conditioning waste heat recovery device in cooling mode provided by an embodiment of the present invention.

[0022] Figure 4 A structural block diagram of an air conditioning waste heat recovery device in hot water making mode provided by an embodiment of the present invention.

[0023] Figure 5 A cross-sectional view of a second four-way valve provided in accordance with an embodiment of the present invention.

[0024] Figure 6 For the present invention Figure 5 A local enlarged view of point X.

[0025] Figure 7 A cross-sectional view of a second four-way valve provided in accordance with another embodiment of the present invention.

[0026] Figure 8 For the present invention Figure 7A partial enlarged view of point Y.

[0027] Fig. 9 It is a cross-sectional view of the second four-way valve in the third working mode of the present invention.

[0028] Fig.10 A schematic diagram of the operation of an air conditioning waste heat recovery device provided in one embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. Compressor; 2. First four-way valve; 3. Heat exchange water tank; 4. First non-return valve; 5. First three-way valve; 6. Second four-way valve; 61. Valve body; 611. Main valve pipe; 612. First branch pipe; 613. Second branch pipe; 614. Third branch pipe; 615. Slider; 616. Connecting groove; 617. Compression spring; 618. Top support bracket; 619. Active ball; 62. Connecting frame; 621. Through port; 622. L-shaped support plate; 623. Sliding groove; 624. Blocking plate; 625. Limiting spring; 626. Stop block; 627. Stop groove; 628. Sealing block; 7. Air conditioner body; 8. Second three-way valve; 9. Third three-way valve; 10. Heat exchanger; 11. Fourth three-way valve; 12. Second non-return valve; 13. Third non-return valve. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1-10 As shown, an air-conditioning waste heat recovery device provided by an embodiment of the present invention includes a compressor 1, a first four-way valve 2, a water exchange tank 3, a first non-return valve 4, a first three-way valve 5, a second four-way valve 6, an air-conditioning body 7, a second three-way valve 8 and a third three-way valve 9, which are sequentially connected end to end through pipelines to form a cooling and hot water cycle; and also includes a heat exchanger 10, a fourth three-way valve 11, a second non-return valve 12 and a third non-return valve 13, wherein the first four-way valve 2 is also connected to the heat exchanger 10, the heat exchanger 10 is connected to the fourth three-way valve 11, the fourth three-way valve 11 is connected to the first three-way valve 5 through the second non-return valve 12, and the fourth three-way valve 11 is connected to the second four-way valve 6 through the third non-return valve 13.

[0033] Specifically in this embodiment, the compressor 1, the first four-way valve 2, the water exchange tank 3, the first non-return valve 4, the first three-way valve 5, the second four-way valve 6, the air conditioner body 7, the second three-way valve 8, the third three-way valve 9, the heat exchanger 10, the fourth three-way valve 11, the second non-return valve 12 and the third non-return valve 13 can all directly select the corresponding mechanisms in the prior art, so their specific structures and working principles are not described in detail. In the refrigeration and hot water cycle, the compressor 1 is used to inhale the refrigerant and output the high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant enters the first four-way valve 2 into the The heat exchange water tank 3 heats the low-temperature water in the heat exchange water tank 3 to high-temperature water, which is to make hot water. The heat exchange water tank 3 is used to exchange heat with the high-temperature refrigerant. The air conditioner body 7 (i.e., the indoor unit) is used to output gas with a temperature substantially the same as that of the refrigerant after the heat exchange. In the cooling and hot water making mode, the refrigerant flow directions in the first four-way valve 2, the first three-way valve 5, the second four-way valve 6, the second three-way valve 8, and the third three-way valve 9 are all unidirectional, and only the refrigerant flow needs to be satisfied. No further details are given here. The heat exchanger 10 (i.e., the outdoor unit) is placed in the external environment. When the refrigerant does not pass through the water exchange tank 3, it will pass through the heat exchanger 10. Both the heat exchanger 10 and the water exchange tank 3 are used to exchange heat with the refrigerant. The difference is that the heat exchanger 10 will discharge the heat, while the water exchange tank 3 will use the heat to heat the liquid for easy use. When the water in the water exchange tank 3 is heated by the waste heat of the air conditioner (and cooled at the same time), the refrigerant flows through the first four-way valve 2 and the second four-way valve 6. At this time, the first four-way valve 2 and the second four-way valve 6 only need to open one pipeline to complete cooling and hot water production. Moreover, during the operation of the system, the first four-way valve 2 and the second four-way valve 6 only need to open one pipeline to complete cooling and hot water production. The valve 2 and the second four-way valve 6 do not need to be frequently switched, which can reduce wear and tear, avoid poor sealing or even air leakage as much as possible, and avoid high-temperature burning of the first four-way valve 2 and the second four-way valve 6. Combined with the pipeline design of the energy-saving air-conditioning water heater system, it can avoid the use of more solenoid valves and use the first one-way valve 4, the second one-way valve 12 and the third one-way valve 13 in the system. The first one-way valve 4, the second one-way valve 12 and the third one-way valve 13 do not need to be energized, are not easily damaged, and work more reliably, making the entire energy-saving air-conditioning refrigeration and water heating system more reliable.

[0034] The whole air-conditioning waste heat recovery device includes three working modes, namely, cooling and hot water making mode, cooling mode and hot water making mode. In cooling and hot water making mode, the refrigerant flows through the compressor 1, the first four-way valve 2, the heat exchange water tank 3, the first non-return valve 4, the first three-way valve 5, the second four-way valve 6, the first throttling device, the air-conditioning body 7, the second three-way valve 8 and the third three-way valve 9, and finally returns to the compressor 1. In this process, the high-temperature refrigerant output by the compressor 1 flows through the heat exchange water tank 3 to be heat-exchanged, and the liquid in the heat exchange water tank 3 is heated. At this time, The high-temperature refrigerant after cooling output from the first outlet of the second four-way valve 6 is cooled again by the first throttling device and enters the air-conditioning body 7, and the air-conditioning body 7 outputs gas with a temperature substantially the same as that of the refrigerant after heat exchange; in the cooling mode, the refrigerant flows through the compressor 1, the first four-way valve 2, the heat exchanger 10, the fourth three-way 11, the first three-way 5, the second four-way valve 6, the first throttling device, the air-conditioning body 7, the second three-way 8 and the third three-way 9, and finally returns to the compressor 1; at this time, the refrigerant does not pass through the heat exchange water tank 3 and will not The water in the heat exchange water tank 3 is heated, and the refrigerant at this time passes through the heat exchanger 10, and the heat is discharged through the heat exchanger 10. At this time, the high-temperature refrigerant after cooling output from the first outlet of the second four-way valve 6 is cooled again through the first throttling device and enters the air-conditioning body 7. The air-conditioning body 7 outputs gas with a temperature substantially the same as that of the refrigerant after heat exchange; in the hot water making mode, the refrigerant flows through the compressor 1, the first four-way valve 2, the heat exchange water tank 3, the first one-way valve 4, the first three-way valve 5, the second four-way valve 6, the second throttling device, the first The four-way valve 11, the heat exchanger 10, the first four-way valve 2 and the third three-way valve 9 finally return to the compressor 1; at this time, the refrigerant passes through the water exchange tank 3 to heat the liquid in the water exchange tank 3. At the same time, the cooled high-temperature refrigerant output from the third outlet of the second four-way valve 6 is cooled again by the second throttling device and enters the heat exchanger 10. After passing through the heat exchanger 10, it returns to the compressor 1 (the cold air is discharged to the outdoor environment through the heat exchanger 10), but the refrigerant does not pass through the air-conditioning body 7, and the cold air will not be output from the air-conditioning body 7.

[0035] Obviously, in the above three working modes, the first four-way valve 2 and the second four-way valve 6 are used. When the cooling and hot water making mode is switched to the cooling mode, of the two four-way valves, only the first four-way valve 2 needs to be switched so that the main inlet of the first four-way valve 2 is connected to the third outlet of the first four-way valve 2, and the second four-way valve 6 does not need to be switched; when the cooling and hot water making mode is switched to the hot water making mode, of the two four-way valves, only the second four-way valve 6 needs to be switched so that the main inlet of the second four-way valve 6 is connected to the third outlet of the second four-way valve 6; and, obviously, in order to make full use of energy, the cooling and hot water making mode The mode is the most commonly used mode, that is, switching from the cooling and hot water making mode to the hot water making mode or the cooling mode is the most common situation, and switching from the hot water making mode or the cooling mode to the cooling and hot water making mode is also a common working mode. In these four cases, only one of the first four-way valve 2 or the second four-way valve 6 is needed to switch the pipeline, which greatly reduces the number of times a single four-way valve needs to be switched. Without frequent switching, wear can be reduced, and poor sealing or even air leakage can be avoided as much as possible, and high-temperature burning of the first four-way valve 2 and the second four-way valve 6 can be avoided.

[0036] In another embodiment provided by the present invention, it also includes an air-conditioning outdoor unit 14, and the air-conditioning outdoor unit 14 includes a compressor 1 and a heat exchanger 10. The air-conditioning outdoor unit 14 is mainly used to provide a working environment for the compressor 1 and the heat exchanger 10.

[0037] In another embodiment provided by the present invention, a first throttling device is also connected between the second four-way valve 6 and the air-conditioning body 7, and the first throttling device is preferably a capillary tube, which is used to reduce the pressure and temperature of the refrigerant to achieve a cooling effect; a second throttling device is also connected between the second four-way valve 6 and the second one-way valve 12, and the second throttling device is also preferably a capillary tube, which is used to reduce the pressure and temperature of the refrigerant to achieve a cooling effect.

[0038] In another embodiment provided by the present invention, the first four-way valve 2 and the second four-way valve 6 both include a main inlet, a first outlet, a second outlet and a third outlet; the main inlet of the first four-way valve 2 is connected to the exhaust port of the compressor 1, the first outlet of the first four-way valve 2 is connected to the heat exchange water tank 3, and the third outlet of the first four-way valve 2 is connected to the heat exchanger 10; the first outlet of the second four-way valve 6 is connected to the air conditioner main body 7.

[0039] In another embodiment provided by the present invention, the first three-way valve 5, the second three-way valve 8, the third three-way valve 9 and the fourth three-way valve 11 all include a main interface, a first branch port and a second branch port; the first branch port of the first three-way valve 5 is connected to the heat exchange water tank 3, the second branch port of the first three-way valve 5 is connected to the first branch port of the fourth three-way valve 11, and the main interface of the first three-way valve 5 is connected to the main inlet of the second four-way valve 6; the first branch port of the second three-way valve 8 is connected to the air-conditioning body 7, the second branch port of the second three-way valve 8 is connected to the second outlet of the second four-way valve 6, and the main interface of the second three-way valve 8 is connected to the first branch port of the third three-way valve 9; the second branch port of the third three-way valve 9 is connected to the second outlet of the first four-way valve 2, and the main interface of the third three-way valve 9 is connected to the air inlet of the compressor 1; the second branch port of the fourth three-way valve 11 is connected to the third outlet of the second four-way valve 6, and the main interface of the fourth three-way valve 11 is connected to the heat exchanger 10.

[0040] In addition, the first one-way valve 4 is connected between the heat exchange water tank 3 and the first branch port of the first three-way valve 5; the second one-way valve 12 is connected between the second branch port of the first three-way valve 5 and the first branch port of the fourth three-way valve 11, and the third one-way valve 13 is connected between the third outlet of the second four-way valve 6 and the second branch port of the fourth three-way valve 11.

[0041] The following is a detailed description of the three working modes: the entire air-conditioning waste heat recovery device includes three working modes, namely, cooling and hot water making mode, cooling mode and hot water making mode. In the cooling and hot water making mode, the refrigerant flows through the compressor 1, the main inlet of the first four-way valve 2, the first outlet of the first four-way valve 2, the heat exchanger tank 3, the first one-way valve 4, the first branch port of the first three-way 5, the main interface of the first three-way valve 5, the main interface of the second four-way valve 6, the first outlet of the second four-way valve 6, the first throttling device, the air-conditioning body 7, the first branch port of the second three-way 8, the main interface of the second three-way 8, the first branch port of the third three-way 9 and the main interface of the third three-way 9, and finally returns to the compressor 1. In this process, the high-temperature refrigerant output by the compressor 1 flows through the heat exchanger tank 3 to be heat exchanged, and the liquid in the heat exchanger tank 3 is heated. At this time, the cooled high-temperature refrigerant output from the first outlet of the second four-way valve 6 is cooled again by the first throttling device and enters the air-conditioning body 7, and the air-conditioning body 7 outputs a gas with a temperature roughly the same as that of the refrigerant after heat exchange.

[0042] In the cooling mode, the refrigerant flows through the compressor 1, the main inlet of the first four-way valve 2, the third outlet of the first four-way valve 2, the heat exchanger 10, the fourth three-way 11 main interface, the fourth three-way 11 first branch port, the first three-way 5 second branch port, the first three-way 5 main interface, the second four-way valve 6 main inlet, the second four-way valve 6 first outlet, the first throttling device, the air-conditioning body 7, the second three-way 8 first branch port, the second three-way 8 main interface, the third three-way 9 first branch port and the third three-way 9 main interface, and finally returns to the compressor 1; at this time, the refrigerant does not pass through the water exchange tank 3 and will not heat the water in the water exchange tank 3. At this time, the refrigerant passes through the heat exchanger 10 and discharges the heat through the heat exchanger 10. At this time, the high-temperature refrigerant output from the first outlet of the second four-way valve 6 after being cooled again through the first throttling device enters the air-conditioning body 7, and the air-conditioning body 7 outputs a gas with a temperature roughly the same as that of the refrigerant after heat exchange.

[0043] In the hot water making mode, the refrigerant flows through the compressor 1, the main inlet of the first four-way valve 2, the first outlet of the first four-way valve 2, the heat exchanger tank 3, the first one-way valve 4, the first branch port of the first three-way 5, the first three-way 5 main interface, the second four-way valve 6 main interface, the second four-way valve 6 third outlet, the second throttling device, the fourth three-way 11 second branch port, the fourth three-way 11 main interface, the heat exchanger 10, the first four-way valve 2 third outlet, the first four-way valve 2 second outlet, the third three-way 9 second branch port and the third three-way 9 main interface, and finally returns to the compressor 1; at this time, the refrigerant passes through the heat exchanger tank 3 to heat the liquid in the heat exchanger tank 3. At the same time, the cooled high-temperature refrigerant output from the third outlet of the second four-way valve 6 is cooled again by the second throttling device and enters the heat exchanger 10. After passing through the heat exchanger 10, it returns to the compressor 1, but the refrigerant does not pass through the air-conditioning body 7, and thus will not output cold air.

[0044] In another embodiment provided by the present invention, the heat exchange water tank 3 includes a water storage barrel, a coil is arranged in the water storage barrel, the first outlet of the first four-way valve 2 is connected to the coil, the water storage barrel is also filled with a heat exchange medium, the heat exchange medium is preferably an antifreeze, and the water storage barrel is also filled with circulated water (water and the heat exchange medium are separated by an inner tank, and the heat exchange medium is installed in the inner tank). When the refrigerant passes through the coil, the heat is exchanged with the heat exchange medium in the water storage barrel, and then the water is heated by the heat exchange medium.

[0045] In another embodiment provided by the present invention, during the cooling and hot water circulation and refrigeration, the second outlet of the second four-way valve 6 is partially connected with the second branch port of the second three-way valve 8, and part of the refrigerant flows back to the third three-way valve 9 through the second outlet of the second four-way valve 6 and finally flows back to the compressor 1; when making hot water, part of the refrigerant can also flow back to the third three-way valve 9 through the second outlet of the second four-way valve 6 and finally flows back to the compressor 1. In addition, the second outlet of the second four-way valve 6 is also used to reverse the flow direction of the refrigerant.

[0046] In addition, this system can be used as a stand-alone air conditioner or a central air conditioner when used for air conditioning. It can be used in various occasions such as family homes, guesthouses, hotels, barber shops, restaurants, bathing centers and swimming pools, and can provide hot water all year round.

[0047] In summer, hot water and cold air are provided; the refrigerant passes through the compressor 1, the first four-way valve 2 and the second four-way valve 6, etc., and then passes through the coil to exchange heat with the heat exchange medium in the water exchange tank 3, and the heat exchange medium then exchanges heat with the water inside the water exchange tank 3, and the water in the water exchange tank 3 is used for bathing; on the other hand, the cold energy generated by the refrigerant after passing through the capillary tube is used to cool the room through the air-conditioning body 7.

[0048] In winter, hot water is provided; the refrigerant passes through the compressor 1, the first four-way valve 2 and the second four-way valve 6, etc., and then passes through the coil to exchange heat with the heat exchange medium in the water exchange tank 3. The heat exchange medium then exchanges heat with the water inside the water exchange tank 3. The water in the water exchange tank 3 is used for bathing or heating the radiator. On the other hand, the cold energy generated by the refrigerant after passing through the capillary tube is discharged to the outside through the heat exchanger 10.

[0049] In order to ensure the sealing effect of the first four-way valve 2 and the second four-way valve 6, the first four-way valve 2 or the second four-way valve 6 (taking the second four-way valve 6 as an example) can be further improved. The second four-way valve 6 in the prior art includes a valve body 61, in which a working chamber is arranged. One end of the arc-shaped side wall of the valve body 61 is connected with a main valve pipe 611 (the direction in which the main valve pipe 611 is located is defined as upward), and the other end of the arc-shaped side wall of the valve body 61 is connected with a first branch pipe 612, a second branch pipe 613 and a third branch pipe 614 in sequence (the directions in which the first branch pipe 612, the second branch pipe 613 and the third branch pipe 614 are located are defined as downward, In addition, the direction close to the first branch pipe 612 is defined as the left, and the direction close to the third branch pipe 614 is defined as the right, and the three from left to right are respectively the first outlet, the second outlet and the third outlet mentioned above, the first branch pipe 612, the second branch pipe 613 and the third branch pipe 614 have the same diameter, and the ends of the first branch pipe 612, the second branch pipe 613 and the third branch pipe 614 located in the working chamber are all installed on a pad, and the end of the pad facing the main valve pipe 611 is flat, and two piston plates are slidably installed in the working chamber, and the ends of the two piston plates close to each other are fixed with a connecting frame 62, and the two connecting frames 62 are connected A slider 615 is installed between the two ends of the main valve tube 611 and the two ends of the main valve tube 612. The slider 615 is preferably square. The end of the slider 615 close to the main valve tube 611 can be a plane or an arc surface, preferably an arc surface. The slider 615 slides in the working chamber. The end of the slider 615 close to the pad is dynamically sealed and connected to the pad. The main function of the pad is to make the slider 615 slide stably and help maintain a sealed environment. The end of the slider 615 close to the first branch pipe 612 is provided with a connecting groove 616. The connecting groove 616 is preferably arc-shaped. The connecting groove 616 can only cover the two adjacent ones of the first branch pipe 612, the second branch pipe 613 and the third branch pipe 614. pipe openings, so that the connecting groove 616 can only cover the pipe openings of the first branch pipe 612 and the second branch pipe 613 or the second branch pipe 613 and the third branch pipe 614 at most, so as to facilitate the switching of the pipeline for the flow of refrigerant; it also includes a pilot valve (not shown in the figure), which is used to drive the piston plate to move in the working chamber to achieve the switching of the pipeline. The pilot valve is a prior art and will not be elaborated on here. The above-mentioned related technical solutions for the second four-way valve 6 are all prior art. For the convenience of description, the structure of the second four-way valve 6 is basically introduced here. As for the working principle and working process of the second four-way valve 6, no further elaboration is made here.

[0050] Furthermore, a sliding groove is provided on the slider 615, the connecting frame 62 is slidably installed in the sliding groove, and a compression spring 617 is connected between the connecting frame 62 and the sliding groove, and the initial state of the compression spring 617 is compressed. A top support bracket 618 is fixed to the end of the slider 615 close to the main valve tube 611, and an active ball 619 is slidably installed on the end of the top support bracket 618 close to the main valve tube 611, and the active ball 619 abuts against the inner wall of the valve body 61. The function of the active ball 619 is mainly to reduce the sliding wear between the top support bracket 618 and the inner wall of the valve body 61. In this way, when the end of the slider 615 close to the pad slides on the pad and wears, under the elastic action of the compression spring 617, the slider 615 is pushed downward to make it always fit on the pad to minimize refrigerant leakage. However, this solution can only serve as a temporary protection solution for excessive wear of the slider 615. In order to ensure normal operation, the slider 615 still needs to be replaced in time.

[0051] Furthermore, the pilot valve in the prior art drives the slider 615 to move by changing the fluid flow direction and pressure difference. However, during the flow of high-temperature refrigerant, since the slider 615 is not locked, the flow of refrigerant may still drive the slider 615 to slide, thereby causing the refrigerant to leak into other pipelines. For this reason, the present embodiment provides a further solution to the above technical problems. In the present embodiment, both ends of the connecting frame 62 are slidably fitted on the inner wall of the working chamber, and a through opening 621 is provided on the connecting frame 62. That is to say, the high-temperature refrigerant can only enter the first branch pipe 612 or the third branch pipe 614 through the through opening 621. An L-shaped support plate 622 is formed at the lower end of the connecting frame 62. The L-shaped support plate 622 is divided into a first section and a second section. The first section is vertically fixed to the lower end of the connecting frame 62, and the second section is vertically connected to the first section. A sliding groove 623 is provided on the second section of the L-shaped support plate 622, and the through-hole 621 and the sliding groove 623 are correspondingly arranged. The lower end surface of the second section is parallel to the lower end surface of the pad and the pad will not block the sliding of the second section. A blocking plate 624 is slidably installed in the sliding groove 623, and a limiting spring 625 is connected between the blocking plate 624 and the L-shaped support plate 622. A stop block 626 is formed at the lower end of the blocking plate 624, and the stop block 626 is preferably an isosceles trapezoid. In addition, two relatively arranged stop grooves 627 are provided on the pad, and the stop groove 627 is preferably an isosceles trapezoid. The stop block 626 and the adjacent stop groove 627 are correspondingly arranged, and the stop block 626 can be stuck in the stop groove 627. In the initial state, under the elastic action of the limiting spring 625, the stop block 626 extends to the bottom of the sliding groove 623.

[0052] The second four-way valve 6 has two main working modes when it is working. In the first working mode, the main valve pipe 611 is connected to the first branch pipe 612, and the second branch pipe 613 is connected to the third branch pipe 614; in the second working mode, the main valve pipe 611 is connected to the third branch pipe 614, and the first branch pipe 612 is connected to the second branch pipe 613; these two working modes are mainly used for different refrigerant flow directions, but the switching of these two working modes is the same in working principle and working process. The following takes the switching from the first working mode to the second working mode as an example for a specific working description: the piston plate is controlled by the pilot valve to move so that the slider 615 moves from right to left, and the connecting frame 62 also moves synchronously so that the blocking plate 624 and the stop block 626 on the right are close to the pad, and the connecting frame 62 continues to move so that the stop block 626 contacts the pad, and the pad is The stop block 626 is squeezed to move upward and the limit spring 625 is squeezed at the same time. When the stop block 626 moves to the upper end of the pad, it is pressed against the pad under the elastic action of the limit spring 625, and the connecting frame 62 continues to move, thereby driving the stop block 626 to be stuck in the stop groove 627. Moreover, since the through port 621 and the sliding groove 623 are correspondingly arranged, the refrigerant flowing out of the through port 621 will also give a certain pressure to the blocking plate 624, so that the blocking plate 624 and the stop block 626 are pressed more tightly against the pad. In this way, through the elastic action of the limit spring 625 and the refrigerant flowing out of the through port 621, the state of the slider 615 in the first working mode or the second working mode is more stable, avoiding the slider 615 from sliding due to the flow of refrigerant under a stable working state, and thus avoiding refrigerant leakage as much as possible.

[0053] Furthermore, in the above embodiment, different from the prior art, the main function of the second branch pipe 613 is to control the reflux of the refrigerant (the main function of the second branch pipe 613 in the prior art is to be connected with the third branch pipe 614 or the first branch pipe 612 to ensure that the refrigerant can still flow smoothly after switching). In extreme cases (such as the gas temperature output by the compressor 1 does not meet the working conditions or the gas output by the compressor 1 contains more liquid), it is necessary to completely reflux the refrigerant. For this purpose, the present embodiment provides a further solution to achieve full reflux of the refrigerant through the second four-way valve 6. Reflux, the blocking plate 624 is circular, and the diameter of the blocking plate 624 is equal to the inner diameter of the first branch pipe 612 or the third branch pipe 614; in addition, a sealing block 628 is installed at both ends of the bottom of the connecting groove 616, and the length of the sealing block 628 is smaller than the inner diameter of the first branch pipe 612 or the third branch pipe 614, so as to avoid the sealing block 628 from sealing the first branch pipe 612 or the third branch pipe 614. The main function of the sealing block 628 is to seal the gap between the slider 615 and the pad under specific circumstances.

[0054] In normal operation, when the slider 615 is in the first working mode or the second working mode, it will stop sliding axially. However, in this embodiment, it is necessary to further control the slider 615 to slide axially through the pilot valve. Taking the second working mode as an example, the slider 615 continues to slide axially to the right, so that the blocking plate 624 on the left continues to move to the right. When the blocking plate 624 moves to the top of the first branch pipe 612, the slider 615 stops sliding. At this time, the blocking plate 624 cuts off the flow of refrigerant in the first branch pipe 612. At the same time, the sealing block 628 on the right side is sealed with the right side of the upper end of the pad, that is to say, at this time, the flow of refrigerant in the first branch pipe 612 or the third branch pipe 614 is blocked, and the refrigerant can only enter the second branch pipe 613 after flowing out from the opening 621 on the left side, thus realizing the full reflux of the refrigerant from the second branch pipe 613; and, obviously, under the impact of the refrigerant flow, the blocking plate 624 will continue to move downward for a distance until the inside of the first branch pipe 612, so that the blocking plate 624 can also block the axial sliding of the slider 615 at this time; the movement of the blocking plate 624 at this time is defined as the third working mode, when it is necessary to switch to other working modes, the compressor can be stopped, and the blocking plate 624 continues to move after it is reset upward, so that there is no need to add an additional power source, and the blocking plate 624 can be controlled to perform the third working mode through the pilot valve; in this embodiment, the blocking plate 624 has three functions, first, in the first working mode or the second working mode, it squeezes the stop block 626 downward to perform auxiliary compression and limiting; second, in the third working mode, The stop block 626 completely blocks the pipe mouth of the first branch pipe 612 or the third branch pipe 614, and seals the first branch pipe 612 or the third branch pipe 614 to achieve full reflux; thirdly, in the third working mode, the blocking plate 624 is inserted into the pipe mouth of the first branch pipe 612 or the third branch pipe 614, which can stabilize the state of the slider 615 and prevent the slider 615 from meaningless axial sliding. Moreover, obviously, the blocking plate 624 inserted into the pipe mouth of the first branch pipe 612 or the third branch pipe 614 can clean the impurities on the inner wall of the pipe mouth.

[0055] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An air conditioning waste heat recovery device, characterized in that: It includes a compressor, a first four-way valve, a water exchange tank, a first one-way valve, a first three-way valve, a second four-way valve, an air conditioner body, a second three-way valve and a third three-way valve, which are connected end to end through pipelines to form a cooling and hot water circulation; It also includes a heat exchanger, a fourth three-way valve, a second one-way valve and a third one-way valve. The first four-way valve is also connected to the heat exchanger, the heat exchanger is connected to the fourth three-way valve, the fourth three-way valve is connected to the first three-way valve through the second one-way valve, and the fourth three-way valve is connected to the second four-way valve through the third one-way valve.

2. The air conditioning waste heat recovery device according to claim 1, characterized in that: A first throttling device is also connected between the second four-way valve and the air conditioner body, and the first throttling device is used to reduce the pressure and temperature of the refrigerant.

3. The air conditioning waste heat recovery device according to claim 1, characterized in that: The first four-way valve and the second four-way valve each include a main inlet, a first outlet, a second outlet and a third outlet; The main inlet of the first four-way valve is connected to the exhaust port of the compressor, the first outlet of the first four-way valve is connected to the heat exchange water tank, and the third outlet of the first four-way valve is connected to the heat exchanger; The first outlet of the second four-way valve is connected to the air conditioner body.

4. The air conditioning waste heat recovery device according to claim 3, characterized in that: The first three-way, the second three-way, the third three-way and the fourth three-way all include a main interface, a first branch port and a second branch port; The first branch port of the first three-way valve is connected to the heat exchange water tank, the second branch port of the first three-way valve is connected to the first branch port of the fourth three-way valve, and the main port of the first three-way valve is connected to the main inlet of the second four-way valve; The first branch port of the second three-way valve is connected to the air conditioner body, the second branch port of the second three-way valve is connected to the second outlet of the second four-way valve, and the main interface of the second three-way valve is connected to the first branch port of the third three-way valve; The second branch port of the third three-way valve is connected to the second outlet of the first four-way valve, and the main port of the third three-way valve is connected to the air inlet of the compressor; The second branch port of the fourth three-way valve is connected to the third outlet of the second four-way valve, and the main port of the fourth three-way valve is in communication with the heat exchanger.

5. The air conditioning waste heat recovery device according to claim 4, characterized in that: In the cooling and hot water making mode, the refrigerant flows through the compressor, the first four-way valve main inlet, the first four-way valve first outlet, the heat exchange tank, the first one-way valve, the first branch port of the first three-way valve, the first three-way main interface, the second four-way valve main interface, the second four-way valve first outlet, the air conditioner body, the second three-way first branch port, the second three-way main interface, the third three-way first branch port and the third three-way main interface, and finally returns to the compressor.

6. The air conditioning waste heat recovery device according to claim 4, characterized in that: In the cooling mode, the refrigerant flows through the compressor, the first four-way valve main inlet, the first four-way valve third outlet, the heat exchanger, the fourth three-way main interface, the fourth three-way first branch port, the first three-way second branch port, the first three-way main interface, the second four-way valve main inlet, the second four-way valve first outlet, the air conditioner body, the second three-way first branch port, the second three-way main interface, the third three-way first branch port and the third three-way main interface, and finally returns to the compressor.

7. The air conditioning waste heat recovery device according to claim 4, characterized in that: In the hot water making mode, the refrigerant flows through the compressor, the main inlet of the first four-way valve, the first outlet of the first four-way valve, the hot water exchange tank, the first one-way valve, the first branch port of the first three-way valve, the first three-way main interface, the second four-way valve main interface, the third outlet of the second four-way valve, the second branch port of the fourth three-way valve, the fourth three-way main interface, the heat exchanger, the third outlet of the first four-way valve, the second outlet of the first four-way valve, the second branch port of the third three-way valve and the third three-way main interface, and finally returns to the compressor.

8. The air conditioning waste heat recovery device according to claim 3, characterized in that: The heat exchange water tank comprises a water storage barrel, a heat exchange medium is arranged in the water storage barrel, the first outlet of the first four-way valve is connected with the heat exchange medium, and the water storage barrel is also filled with liquid.

9. The air conditioning waste heat recovery device according to claim 1, characterized in that: A second throttling device is also connected between the second four-way valve and the second one-way valve, and the second throttling device is used to reduce the pressure and temperature of the refrigerant.

10. The air conditioning waste heat recovery device according to claim 5, characterized in that: In the cooling and hot water making mode, the second outlet of the second four-way valve is partially connected to the second branch outlet of the second three-way valve, and part of the refrigerant flows back to the third three-way valve through the second outlet of the second four-way valve and finally flows back to the compressor.

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