A heat pump system for hot and cold water supply

Abstract

The present invention discloses a heat pump system for hot and cold water supply, comprising a heat transfer system and an environmental heat exchange system; the heat transfer system comprises a hot water tank, a cold water tank and a heat pump pipeline; the heat pump pipeline comprises a heat absorption pipeline, a compressor, a heat release pipeline and an expansion valve, and the heat absorption pipeline, the compressor, the heat release pipeline and the expansion valve are connected end to end in sequence to form a heat exchange loop; the heat absorption pipeline is connected to the cold water tank for heat absorption; the heat release pipeline is connected to the hot water tank for heat release; the environmental heat exchange system comprises an environmental heat exchanger and an environmental heat exchange pipeline, and the environmental heat exchanger is connected to the heat transfer system through the environmental heat exchange pipeline, and is used to exchange heat between the heat transfer system and the environment where the environmental heat exchanger is located. The present invention provides a heat pump system for hot and cold water supply, which can continuously produce hot water and ice water and is less affected by the environment.

Description

Technical Field

[0001] The invention belongs to the technical field of heat pumps, and in particular relates to a heat pump system for supplying cold and hot water. Background Art

[0002] In the catering industry, hot water and ice water are often needed. Usually, hot water is prepared by a water heater, while ice water is prepared by a refrigerator. Both methods consume a lot of energy and are costly.

[0003] A heat pump is a device that can transfer heat between two objects. It can transfer heat from room temperature water to produce low-temperature water and warm water at the same time, and continue to transfer heat from low-temperature water and warm water to eventually produce the required ice water and hot water. The energy it consumes is lower than that of water heaters and refrigerators.

[0004] However, in actual use, the use of ice water and hot water is not completely synchronized. There may be a situation where the demand for ice water is large and the demand for hot water is small. In this case, the hot water temperature will be too high, causing the entire system to be unable to continue to absorb heat and produce ice water for use. Similarly, in winter, when the ambient temperature is low, ice water is prone to solidification and blockage, causing the entire system to paralyze. Summary of the invention

[0005] In order to solve the above problems in the prior art, the present invention provides a heat pump system for hot and cold water supply, which can continuously produce hot water and ice water and reduce the impact of the environment.

[0006] The present invention adopts the following technical solutions:

[0007] A heat pump system for hot and cold water supply, comprising a heat transfer system and an environmental heat exchange system;

[0008] The heat transfer system includes a hot water tank, a cold water tank and a heat pump pipeline; the heat pump pipeline includes a heat absorption pipeline, a compressor, a heat release pipeline and an expansion valve, and the heat absorption pipeline, the compressor, the heat release pipeline and the expansion valve are connected end to end in sequence to form a heat exchange loop; the heat absorption pipeline is connected to the cold water tank to absorb heat; the heat release pipeline is connected to the hot water tank to release heat;

[0009] The environmental heat exchange system includes an environmental heat exchanger and an environmental heat exchange pipeline. The environmental heat exchanger is connected to the heat transfer system through the environmental heat exchange pipeline, and is used to exchange heat between the heat transfer system and the environment where the environmental heat exchanger is located.

[0010] As a further improvement of the technical solution of the present invention, the heat absorption pipeline is a first coil heat exchanger, the first coil heat exchanger is arranged in the cold water tank, and the two ends of the first coil heat exchanger are respectively connected to the expansion valve and the compressor;

[0011] The heat release pipeline is a second coil heat exchanger, which is arranged in the hot water tank, and the two ends of the second coil heat exchanger are respectively connected to the expansion valve and the compressor.

[0012] As a further improvement of the technical solution of the present invention, the environmental heat exchange pipeline includes a first subcooling and heating branch with a switchable connection state and a first superheating and heat dissipation branch with a switchable connection state, and the first subcooling and heating branch and the first superheating and heat dissipation branch are not connected at the same time;

[0013] The first supercooling and heating branch includes a cold water inlet pipe and a heating drain pipe, the cold water inlet pipe is connected to the heating drain pipe through the environmental heat exchanger, and the water inlet of the cold water inlet pipe and the water outlet of the heating drain pipe are both connected to the cold water tank;

[0014] The first overheating heat dissipation branch includes a hot water inlet pipe and a cooling drain pipe. The hot water inlet pipe is connected to the cooling drain pipe through the environmental heat exchanger. The water inlet of the hot water inlet pipe and the water outlet of the cooling drain pipe are both connected to the hot water tank.

[0015] As a further improvement of the technical solution of the present invention, the environmental heat exchanger is provided with a liquid inlet and a liquid outlet;

[0016] It also includes a double four-way valve; the double four-way valve includes a valve body and a valve core provided with a valve cavity, the valve body is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface and a sixth interface; the valve core is arranged in the valve cavity and can be switched between a first position and a second position; the valve core is provided with a first channel, a second channel and a third channel;

[0017] When the valve core is in the first position, the first channel connects the first interface with the third interface, and the second channel connects the second interface with the fourth interface;

[0018] When the valve core is in the second position, the third channel connects the first interface with the fifth interface, and the fourth channel formed between the end of the valve core and the inner wall of the valve cavity connects the second interface with the sixth interface;

[0019] The liquid inlet of the environmental heat exchanger is connected to the first interface, and the liquid outlet is connected to the second interface;

[0020] The third interface is connected to the cold water inlet pipe, and the fourth interface is connected to the heating drain pipe;

[0021] The fifth interface is connected to the hot water inlet pipe, and the sixth interface is connected to the cooling drain pipe.

[0022] As a further improvement of the technical solution of the present invention, the environmental heat exchange pipeline includes a second subcooling and heating branch with a switchable connection state and a second superheating and heat dissipation branch with a switchable connection state, and the second subcooling and heating branch and the second superheating and heat dissipation branch are not connected at the same time;

[0023] The second subcooling and heating branch includes a first refrigerant pipe and a second refrigerant pipe, the first refrigerant pipe is connected to the second refrigerant pipe through the environmental heat exchanger, the inlet of the first refrigerant pipe is connected to the outlet of the expansion valve, and the outlet of the second refrigerant pipe is connected to the inlet of the compressor;

[0024] The second overheat dissipation branch includes a third refrigerant pipe and a fourth refrigerant pipe. The third refrigerant pipe is connected to the fourth refrigerant pipe through the environmental heat exchanger. The inlet of the third refrigerant pipe is connected to the outlet of the compressor, and the outlet of the fourth refrigerant pipe is connected to the inlet of the expansion valve.

[0025] As a further improvement of the technical solution of the present invention, the environmental heat exchanger is provided with a liquid inlet and a liquid outlet;

[0026] It also includes a double four-way valve; the double four-way valve includes a valve body and a valve core provided with a valve cavity, the valve body is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface and a sixth interface; the valve core is arranged in the valve cavity and can be switched between a first position and a second position; the valve core is provided with a first channel, a second channel and a third channel;

[0027] When the valve core is in the first position, the first channel connects the first interface with the third interface, and the second channel connects the second interface with the fourth interface;

[0028] When the valve core is in the second position, the third channel connects the first interface with the fifth interface, and the fourth channel formed between the end of the valve core and the inner wall of the valve cavity connects the second interface with the sixth interface;

[0029] The liquid inlet of the environmental heat exchanger is connected to the first interface, and the liquid outlet is connected to the second interface;

[0030] The third interface is connected to the first refrigerant pipe, and the fourth interface is connected to the second refrigerant pipe;

[0031] The fifth interface is connected to the third refrigerant pipe, and the sixth interface is connected to the fourth refrigerant pipe.

[0032] As a further improvement of the technical solution of the present invention, the double four-way valve also includes an electromagnetic component for adsorbing and controlling the valve core to switch positions.

[0033] As a further improvement of the technical solution of the present invention, the environmental heat exchanger is a condenser arranged outdoors or a third coil heat exchanger arranged in an external water body.

[0034] As a further improvement of the technical solution of the present invention, the heat absorption pipeline is provided with a first check valve at both ends of the cold water tank; the heat release pipeline is provided with a second check valve at both ends of the hot water tank.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. In the heat pump system for hot and cold water supply of the present invention, the heat of the water in the cold water tank can be transferred to the hot water tank through the heat pump pipeline, so that the water temperature in the hot water tank is increased, thereby generating hot water and cold water at the same time;

[0037] 2. When the cold water tank is overcooled or the hot water tank is overheated and the heat pump pipeline cannot continue to transfer heat, there must be a temperature difference between the ambient temperature and the overcooled pipeline or the overheated pipeline. The environmental heat exchange system can be used to transfer the heat in the environment to the overcooled pipeline or the heat in the overheated pipeline to the environment, so that the overcooled pipeline is heated up or the overheated pipeline is cooled down, thereby ensuring the continued operation of the heat pump pipeline and the continuous generation and supply of cold and hot water. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The technology of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0039] Figure 1 is an overall schematic diagram of Example 1;

[0040] Figure 2 is a cross-sectional view of the valve core in the first position;

[0041] Figure 3 is a cross-sectional view of the valve core in the second position;

[0042] Figure 4 is an overall schematic diagram of Example 2;

[0043] Figure 5 is an overall schematic diagram of Example 3;

[0044] Figure 6 is an overall schematic diagram of Example 4;

[0045] Figure 7 It is a cross-sectional view of the two-way valve core in the closed position;

[0046] Figure 8 It is a cross-sectional view of the two-way valve core in the open position;

[0047] Fig. 9 It is an overall schematic diagram of Example 5.

[0048] Reference numerals:

[0049] 1-hot water tank; 2-cold water tank; 3-heat absorption pipeline; 31-first check valve; 4-compressor; 5-heat release pipeline; 51-second check valve; 6-expansion valve;

[0050] 7-environmental heat exchanger; 71-liquid inlet; 72-liquid outlet;

[0051] 8-environmental heat exchange pipeline; 81-first subcooling and heating branch; 811-cold water inlet pipe; 812-heating drain pipe;

[0052] 82-first overheating heat dissipation branch; 821-hot water inlet pipe; 822-cooling drainage pipe;

[0053] 83-second subcooling and heating branch; 831-first refrigerant pipe; 832-second refrigerant pipe;

[0054] 84-second overheating heat dissipation branch; 841-third refrigerant pipe; 842-fourth refrigerant pipe;

[0055] 9- double four-way valve; 91- valve body; 911- first interface; 912- second interface; 913- third interface; 914- fourth interface; 915- fifth interface; 916- sixth interface; 92- valve core; 921- first channel; 922- second channel; 923- third channel; 924- fourth channel; 93- electromagnetic assembly;

[0056] 100-connecting valve; 101-circulating water pump; 102-solenoid valve;

[0057] 103 - first linkage two-way valve; 1031 - housing; 1032 - two-way valve core; 1033 - seventh interface; 1034 - eighth interface; 1035 - ninth interface; 1036 - tenth interface; 1037 - fifth channel; 1038 - sixth channel; 104 - second linkage two-way valve. DETAILED DESCRIPTION

[0058] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0059] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0060] Embodiment 1:

[0061] Reference Figures 1 to 3 , a heat pump system for hot and cold water supply, including a heat transfer system and an environmental heat exchange system.

[0062] Wherein, the heat transfer system includes a hot water tank 1, a cold water tank 2 and a heat pump pipeline.

[0063] The hot water tank 1 and the cold water tank 2 both have an insulated outer shell and are connected to a water pipe, which injects normal temperature tap water into the two tanks. The hot water tank 1 is provided with a hot water supply pipe for providing hot water to the user. The cold water tank 2 is provided with a cold water supply pipe for providing cold water to the user.

[0064] The heat pump pipeline includes a heat absorption pipeline 3, a compressor 4, a heat release pipeline 5 and an expansion valve 6, and the heat absorption pipeline 3, the compressor 4, the heat release pipeline 5 and the expansion valve 6 are connected end to end in sequence to form a heat exchange loop; the heat absorption pipeline 3 is connected to the cold water tank 2 for heat absorption; the heat release pipeline 5 is connected to the hot water tank 1 for heat release. The cold water tank 2 and the hot water tank 1 are respectively connected to the tap water pipe, and the tap water pipe supplies normal temperature water. After starting the heat pump pipeline, the heat of the water in the cold water tank 2 can be transferred to the water in the hot water tank 1 through the heat pump pipeline, and then the water temperature in the cold water tank 2 is reduced, while the water temperature in the hot water tank 1 is increased, and the heat pump pipeline is continuously circulated, and finally the required cold water and hot water can be obtained.

[0065] The working principle of the heat pump pipeline belongs to conventional technology and will not be described in detail here.

[0066] Among them, the heat absorption pipeline 3 is the first coil heat exchanger, which is arranged in the cold water tank 2. The two ends of the first coil heat exchanger are respectively connected to the expansion valve 6 and the compressor 4. The refrigerant in the heat pump pipeline passes through the expansion valve 6 and the first coil heat exchanger to absorb the heat in the cold water tank 2 to cool the cold water tank 2.

[0067] Similarly, the heat release pipeline 5 is a second coil heat exchanger, which is arranged in the hot water tank 1. The two ends of the second coil heat exchanger are respectively connected to the expansion valve 6 and the compressor 4. The refrigerant in the heat pump pipeline can release heat in the second coil heat exchanger after passing through the compressor 4, so that the water in the hot water tank 1 is heated up to produce hot water.

[0068] In order to prevent the ambient temperature from affecting the normal operation of the heat pump pipeline, for example, the weather is too cold and the water in the cold water tank 2 is too cold, the heat pump pipeline is difficult to transfer heat and cannot produce hot water. The environmental heat exchange system includes an environmental heat exchanger 7 and an environmental heat exchange pipeline 8. The environmental heat exchanger 7 is connected to the heat transfer system through the environmental heat exchange pipeline 8, and is used to exchange heat between the heat transfer system and the environment where the environmental heat exchanger 7 is located. The environmental heat exchanger 7 is connected to the above-mentioned heat pump pipeline through the environmental heat exchange pipeline 8. When the cold water tank 2 is overcooled or the hot water tank 1 is overheated, the environmental heat exchange system transfers the heat in the environment to the overcooled pipeline or transfers the heat of the overheated pipeline to the environment, so that the overcooled pipeline is heated up or the overheated pipeline is cooled down, thereby ensuring the continued operation of the heat pump pipeline and ensuring the continuous generation and supply of cold water and hot water.

[0069] Specifically, the environmental heat exchange pipeline 8 includes a first subcooling and heating branch 81 with a switchable connection state and a first superheating and heat dissipation branch 82 with a switchable connection state, and the first subcooling and heating branch 81 and the first superheating and heat dissipation branch 82 are not connected at the same time.

[0070] The first supercooling and heating branch 81 includes a cold water inlet pipe 811 and a heating drain pipe 812, wherein the cold water inlet pipe 811 is connected to the heating drain pipe 812 through the environmental heat exchanger 7, and the water inlet of the cold water inlet pipe 811 and the water outlet of the heating drain pipe 812 are both connected to the cold water tank 2;

[0071] The first overheating heat dissipation branch 82 includes a hot water inlet pipe 821 and a cooling drain pipe 822. The hot water inlet pipe 821 is connected to the cooling drain pipe 822 through the environmental heat exchanger 7. The water inlet of the hot water inlet pipe 821 and the water outlet of the cooling drain pipe 822 are both connected to the hot water tank 1.

[0072] Based on the above structure, when the ambient temperature is low, the water in the cold water tank 2 is too cold, and the heat pump pipeline is difficult to absorb heat to produce hot water, the first supercooling and heating branch 81 is opened, and the first superheating and heat dissipation branch 82 is closed. At this time, the supercooled water enters the environmental heat exchanger 7 from the cold water inlet pipe 811. Since the temperature of the supercooled water is lower than the ambient temperature, the supercooled water absorbs heat from the environment through the environmental heat exchanger 7, the water temperature rises, and then returns to the cold water tank 2 from the heating drain pipe 812. This continuous cycle makes the temperature in the cold water tank 2 return to the normal cold water temperature, and the heat pump pipeline can continue to absorb heat to produce hot water.

[0073] Conversely, the water temperature in the hot water tank 1 is too high, and the heat pump can no longer transfer heat and produce cold water. The first superheated heat dissipation branch 82 is opened, and the first supercooling heating branch 81 is closed. At this time, the superheated water enters the environmental heat exchanger 7 through the hot water inlet pipe 821. Since the temperature of the superheated water is higher than the ambient temperature, the superheated water releases heat to the environment through the environmental heat exchanger 7, the water temperature decreases, and then returns to the hot water tank 1 through the cooling drain pipe 822. This cycle continues, so that the temperature in the hot water tank 1 returns to the normal hot water temperature, and the heat pump pipeline can continue to absorb heat to produce cold water.

[0074] The first subcooling and heating branch 81 and the first superheating and cooling branch 82 are switchable in connection state, that is, the first subcooling and heating branch 81 and the first superheating and cooling branch 82 are provided with valves for controlling the connection. Specifically, the first subcooling and heating branch 81 and the first superheating and cooling branch 82 are provided with connecting valves 100 at both ends connected to the ambient heat exchanger, and the connection between the first subcooling and heating branch 81 and the first superheating and cooling branch 82 is controlled by each connecting valve 100.

[0075] Preferably, in order to facilitate the control of the environmental heat exchanger 7, the heat pump system further includes a double four-way valve 9. The double four-way valve referred to herein is a valve that connects two pipelines and has four channels inside. The double four-way valve 9 includes a valve body 91 and a valve core 92 provided with a valve cavity. The valve body 91 is provided with a first interface 911, a second interface 912, a third interface 913, a fourth interface 914, a fifth interface 915 and a sixth interface 916; the valve core 92 is arranged in the valve cavity and can be switched between a first position and a second position; the valve core 92 is provided with a first channel 921, a second channel 922 and a third channel 923.

[0076] When the valve core 92 is in the first position, the first channel 921 connects the first port 911 with the third port 913 , and the second channel 922 connects the second port 912 with the fourth port 914 .

[0077] When the valve core 92 is in the second position, the third channel 923 connects the first interface 911 with the fifth interface 915 , and the fourth channel 924 formed between the end of the valve core 92 and the inner wall of the valve cavity connects the second interface 912 with the sixth interface 916 .

[0078] The environmental heat exchanger 7 is provided with a liquid inlet 71 and a liquid outlet 72; the liquid inlet 71 of the environmental heat exchanger 7 is connected to the first interface 911, and the liquid outlet 72 is connected to the second interface 912. In actual use, a circulating water pump 101 is provided between the liquid inlet 71 and the first interface 911 to drive the flow of the first subcooling and heating branch 81 or the first superheating and heat dissipation branch 82. When the circulating water pump 101 stops working, the first subcooling and heating branch 81 and the first superheating and heat dissipation branch 82 both stop flowing, and no supercooling heat absorption or superheating heat dissipation is performed.

[0079] The third interface 913 is connected to the cold water inlet pipe 811 , and the fourth interface 914 is connected to the heating drain pipe 812 ; the fifth interface 915 is connected to the hot water inlet pipe 821 , and the sixth interface 916 is connected to the cooling drain pipe 822 .

[0080] In the above structure, the environment heat exchanger 7 is connected to the first subcooling and heating branch 81 and the first superheating heat dissipation branch 82 through the double four-way valve 9. When the valve core 92 of the double four-way valve 9 is in the first position, the first subcooling and heating branch 81 is opened, and the first superheating heat dissipation branch 82 is closed, and the supercooled water can be heated at this time. When the valve core 92 of the double four-way valve 9 is in the second position, the first superheating heat dissipation branch 82 is opened, and the first subcooling and heating branch 81 is closed, and the superheated water can be cooled at this time.

[0081] Preferably, the double four-way valve 9 also includes an electromagnetic component 93 for adsorbing and controlling the valve core 92 to switch the position. The electromagnetic component 93 includes an electromagnetic coil and an elastic reset member. When the electromagnetic component 93 is powered off, the elastic reset member pushes the valve core 92 outward, and the valve core 92 is in the first position; when the electromagnetic component 93 is powered on, the electromagnetic limit adsorbs the valve core 92 to the second position, and the elastic reset member is compressed.

[0082] Specifically, the environmental heat exchanger includes a condenser arranged outdoors, through which heat can be exchanged with outdoor air. In addition, a fan can be arranged to blow air to the condenser.

[0083] Alternatively, the environmental heat exchanger is a third coil heat exchanger disposed in an external water body, and the external water body may be river water or well water, and heat is exchanged with the river water or well water through the third coil heat exchanger.

[0084] Embodiment 2:

[0085] Reference Figures 2 to 4This embodiment discloses a heat pump system for hot and cold water supply, which is basically the same as the heat pump system of embodiment 1, except that the environment heat exchange pipeline 8 is set differently. The environment heat exchange pipeline 8 of embodiment 1 exchanges heat between the environment and the water in the two water tanks, while this embodiment exchanges heat between the environment and the refrigerant.

[0086] The environmental heat exchange pipeline 8 includes a second subcooling and heating branch 83 with switchable connection state and a second superheating and cooling branch 84 with switchable connection state, and the second subcooling and heating branch 83 and the second superheating and cooling branch 84 are not connected at the same time.

[0087] The second subcooling and heating branch 83 includes a first refrigerant pipe 831 and a second refrigerant pipe 832. The first refrigerant pipe 831 is connected to the second refrigerant pipe 832 through the environmental heat exchanger 7. The inlet of the first refrigerant pipe 831 is connected to the outlet of the expansion valve 6, and the outlet of the second refrigerant pipe 832 is connected to the inlet of the compressor 4.

[0088] The second overheat dissipation branch 84 includes a third refrigerant pipe 841 and a fourth refrigerant pipe 842. The third refrigerant pipe 841 is connected to the fourth refrigerant pipe 842 through the environmental heat exchanger 7. The inlet of the third refrigerant pipe 841 is connected to the outlet of the compressor 4, and the outlet of the fourth refrigerant pipe 842 is connected to the inlet of the expansion valve 6.

[0089] Based on the above structure, when the ambient temperature is low, the water in the cold water tank 2 is too cold, and the heat pump pipeline is difficult to absorb heat to produce hot water, the second supercooling and heating branch 83 is opened, and the second superheating and heat dissipation branch 84 is closed. At this time, the refrigerant enters the first refrigerant pipe 831 after coming out of the expansion valve 6, and then enters the environmental heat exchanger 7. The refrigerant skips the water in the cold water tank 2 and directly absorbs heat from the environment, then enters the second refrigerant pipe 832, and enters the heat release pipeline 5 after being pressurized by the compressor 4, and heats the water in the hot water tank 1 to produce hot water.

[0090] Conversely, the water temperature in the hot water tank 1 is too high, and the heat pump can no longer transfer heat and produce cold water. The second superheat heat dissipation branch 84 is opened, and the second supercooling heating branch 83 is closed. At this time, the refrigerant comes out of the compressor 4, enters the environmental heat exchanger 7 through the third refrigerant pipe 841, dissipates heat to the surrounding environment, and then enters the heat absorption pipeline 3 through the fourth refrigerant pipe 842 through the expansion valve 6, absorbs the heat in the cold water tank 2, and thus produces cold water.

[0091] The second subcooling temperature rising branch 83 and the second superheating heat dissipation branch 84 are switchable in connection state, that is, the second subcooling temperature rising branch 83 and the second superheating heat dissipation branch 84 are provided with valves for controlling the connection. Specifically, the second subcooling temperature rising branch 83 and the second superheating heat dissipation branch 84 are provided with connecting valves 100 at both ends connected to the ambient heat exchanger, and the connection between the second subcooling temperature rising branch 83 and the second superheating heat dissipation branch 84 is controlled by each connecting valve 100.

[0092] Preferably, as in Embodiment 1, a double four-way valve 9 is also provided in this embodiment.

[0093] The double four-way valve 9 includes a valve body 91 provided with a valve cavity and a valve core 92, wherein the valve body 91 is provided with a first interface 911, a second interface 912, a third interface 913, a fourth interface 914, a fifth interface 915 and a sixth interface 916; the valve core 92 is arranged in the valve cavity and can be switched between a first position and a second position; the valve core 92 is provided with a first channel 921, a second channel 922 and a third channel 923;

[0094] When the valve core 92 is in the first position, the first channel 921 connects the first interface 911 with the third interface 913, and the second channel 922 connects the second interface 912 with the fourth interface 914;

[0095] When the valve core 92 is in the second position, the third channel 923 connects the first interface 911 with the fifth interface 915, and the fourth channel 924 formed between the end of the valve core 92 and the inner wall of the valve cavity connects the second interface 912 with the sixth interface 916;

[0096] The environmental heat exchanger 7 is provided with a liquid inlet 71 and a liquid outlet 72; the liquid inlet 71 of the environmental heat exchanger 7 is connected to the first interface 911, and the liquid outlet 72 is connected to the second interface 912;

[0097] The third interface 913 is connected to the first refrigerant pipe 831, and the fourth interface 914 is connected to the second refrigerant pipe 832;

[0098] The fifth interface 915 is connected to the third refrigerant pipe 841 , and the sixth interface 916 is connected to the fourth refrigerant pipe 842 .

[0099] Preferably, a solenoid valve 102 is further provided between the liquid inlet 71 and the first interface 911 of the environmental heat exchanger 7, which is used to control the cutting off of the connection between the liquid inlet 71 and the first interface 911; similarly, another solenoid valve 102 is further provided between the liquid outlet 72 and the second interface 912 of the environmental heat exchanger. When there is no need for supercooling heat absorption or superheating heat dissipation, the connection can be switched through the solenoid valve to stop the operation of the second supercooling heating branch 83 and the second superheating heat dissipation branch 84.

[0100] In the above structure, the environment heat exchanger 7 is connected to the second subcooling and heating branch 83 and the second superheating heat dissipation branch 84 through the double four-way valve 9. When the valve core 92 of the double four-way valve 9 is in the first position, the second subcooling and heating branch 83 is opened, and the second superheating heat dissipation branch 84 is closed, and heat can be absorbed from the environment to produce hot water. When the valve core 92 of the double four-way valve 9 is in the second position, the second superheating heat dissipation branch 84 is opened, and the second subcooling and heating branch 83 is closed, and heat can be dissipated to the surrounding environment to produce cold water.

[0101] Similarly, the double four-way valve 9 also includes an electromagnetic component 93 for adsorbing and controlling the valve core 92 to switch the position. The electromagnetic component 93 includes an electromagnetic coil and an elastic reset member. When the electromagnetic component 93 is powered off, the elastic reset member pushes the valve core 92 outward, and the valve core 92 is in the first position; when the electromagnetic component 93 is powered on, the electromagnetic limit adsorbs the valve core 92 to the second position, and the elastic reset member is compressed.

[0102] In addition, the heat absorption pipeline 3 is provided with a first check valve 31 at both ends of the cold water tank 2; the heat release pipeline 5 is provided with a second check valve 51 at both ends of the hot water tank 1, so that when the second supercooling and heating branch 83 or the second superheating heat dissipation branch 84 is started, the refrigerant discharged from the second supercooling and heating branch 83 or the second superheating heat dissipation branch 84 will not flow back and mix into the cold water tank or the hot water tank, affecting the normal heat absorption and heat release work.

[0103] Specifically, the environmental heat exchanger includes a condenser arranged outdoors, through which heat can be exchanged with outdoor air. In addition, a fan can be arranged to blow air to the condenser.

[0104] Alternatively, the environmental heat exchanger is a third coil heat exchanger disposed in an external water body, and the external water body may be river water or well water, and heat is exchanged with the river water or well water through the third coil heat exchanger.

[0105] Embodiment 3:

[0106] Reference Figure 5This embodiment discloses a heat pump system for hot and cold water supply, which is basically the same as the heat pump system of embodiment 1, except that in this embodiment, a double four-way valve is not used, but a connecting valve 100 is provided at both ends of the first subcooling and heating branch 81 and the first superheating and heat dissipation branch 82 connected to the environmental heat exchanger 7, and the connection between the first subcooling and heating branch 81 and the first superheating and heat dissipation branch 82 is controlled by each connecting valve 100. A circulating water pump is also provided at the water inlet 71 of the environmental heat exchanger 7.

[0107] Each time it is used, the two connecting valves 100 on the first supercooling and heating branch 81 are in the same state, and the two connecting valves 100 on the first heat dissipation branch 82 are in the same state and opposite to the connecting state on the first supercooling and heating branch 81. For example, when the first supercooling and heating branch 81 absorbs heat, the two connecting valves 100 on the first supercooling and heating branch 81 are both opened, while the two connecting valves 100 on the first heat dissipation branch 82 are closed at the same time.

[0108] Conversely, when the two connecting valves 100 on the first heat dissipation branch 82 are opened, the two connecting valves 100 on the first supercooling and heating branch 81 are closed at the same time.

[0109] Embodiment 4:

[0110] Reference Figure 6 , Figure 7 and Figure 8 This embodiment discloses a heat pump system for hot and cold water supply, which is basically the same as the heat pump system of embodiment 3, except that in this embodiment, a double four-way valve is not used, but a first linkage two-way valve 103 is provided on the first supercooling and heating branch 81, and a second linkage two-way valve 104 is provided on the first superheating and heat dissipation branch 82. The linkage two-way valve referred to herein means that two channels are provided inside the valve, and the two channels are linked and can switch states together.

[0111] The first linkage two-way valve 103 and the second linkage two-way valve 104 have the same structure, and the structure of the first linkage two-way valve 103 is explained below.

[0112] The first linkage two-way valve 103 comprises a housing 1031 and a two-way valve core 1032. The housing 1031 is provided with a seventh interface 1033, an eighth interface 1034, a ninth interface 1035 and a tenth interface 1036. The two-way valve core 1032 is provided with a fifth channel 1037 and a sixth channel 1038.

[0113] The two-way valve core 1032 has an open position and a closed position. When the two-way valve core 1032 is in the open position, the fifth channel 1037 connects the seventh interface 1033 and the ninth interface 1035, and the sixth channel 1038 connects the eighth interface 1034 and the tenth interface 1036. When the two-way valve core 1032 is in the closed position, the two ends of the fifth channel 1037 are staggered with the seventh interface 1033 and the ninth interface 1035, and the two ends of the sixth channel 1038 are staggered with the eighth interface 1034 and the tenth interface 1036, and the valve is closed.

[0114] It is also provided with an electromagnetic component and an elastic part, and similar to a double four-way valve, the switching between the open position and the closed position can be controlled by the electromagnetic component.

[0115] In the first supercooling and heating branch 81, the cold water inlet pipe 811 is connected to the ninth interface 1035 of the first linkage two-way valve 103, and the heating drain pipe 812 is connected to the tenth interface 1036 of the first linkage two-way valve 103. The liquid inlet 71 of the environmental heat exchanger 7 is connected to the seventh interface 1033 of the first linkage two-way valve 103, and the liquid outlet 72 is connected to the eighth interface 1034 of the first linkage two-way valve 103.

[0116] Similarly, in the first overheating heat dissipation branch 82, the hot water inlet pipe 821 is connected to the ninth interface 1035 of the second linkage two-way valve 104, and the cooling water discharge pipe 822 is connected to the tenth interface 1036 of the second linkage two-way valve 104. The liquid inlet 71 of the environmental heat exchanger 7 is connected to the seventh interface 1033 of the second linkage two-way valve 104, and the liquid outlet 72 is connected to the eighth interface 1034 of the second linkage two-way valve 104.

[0117] It should be noted that a circulating water pump 101 is provided at the liquid inlet 71 of the environmental heat exchanger 7 .

[0118] Each time it is used, the states of the first double two-way valve 103 and the second double two-way valve 104 are opposite, that is, when the first double two-way valve 103 is in the open position, the second double two-way valve 104 is in the closed position, at which time the first subcooling and heating branch 81 is connected to the ambient heat exchanger to absorb heat by subcooling. Conversely, when the first double two-way valve 103 is in the closed position, the second double two-way valve 104 is in the open position, at which time the first heat dissipation branch 82 is connected to the ambient heat exchanger to release heat by superheating.

[0119] Embodiment 5:

[0120] Reference Figure 7 , Figure 8 and Fig. 9This embodiment discloses a heat pump system for hot and cold water supply, which is basically the same as the heat pump system of embodiment 2, except that in this embodiment, a double four-way valve is not used, but a first linkage two-way valve 103 is provided on the second supercooling and heating branch 83, and a second linkage two-way valve 104 is provided on the second superheating and heat dissipation branch 84. The linkage two-way valve referred to herein means that two channels are provided inside the valve, and the two channels are linked and can switch states together.

[0121] The first linkage two-way valve 103 and the second linkage two-way valve 104 have the same structure, and the structure of the first linkage two-way valve 103 is explained below.

[0122] The first linkage two-way valve 103 comprises a housing 1031 and a two-way valve core 1032. The housing 1031 is provided with a seventh interface 1033, an eighth interface 1034, a ninth interface 1035 and a tenth interface 1036. The two-way valve core 1032 is provided with a fifth channel 1037 and a sixth channel 1038.

[0123] The two-way valve core 1032 has an open position and a closed position. When the two-way valve core 1032 is in the open position, the fifth channel 1037 connects the seventh interface 1033 and the ninth interface 1035, and the sixth channel 1038 connects the eighth interface 1034 and the tenth interface 1036. When the two-way valve core 1032 is in the closed position, the two ends of the fifth channel 1037 are staggered with the seventh interface 1033 and the ninth interface 1035, and the two ends of the sixth channel 1038 are staggered with the eighth interface 1034 and the tenth interface 1036, and the valve is closed.

[0124] It is also provided with an electromagnetic component and an elastic part, and similar to a double four-way valve, the switching between the open position and the closed position can be controlled by the electromagnetic component.

[0125] In the second supercooling and heating branch 83, the first refrigerant pipe 831 is connected to the ninth interface 1035 of the first linkage two-way valve 103, and the second refrigerant pipe 832 is connected to the tenth interface 1036 of the first linkage two-way valve 103. The liquid inlet 71 of the environmental heat exchanger 7 is connected to the seventh interface 1033 of the first linkage two-way valve 103, and the liquid outlet 72 is connected to the eighth interface 1034 of the first linkage two-way valve 103.

[0126] Similarly, in the second superheat heat dissipation branch 84, the third refrigerant pipe 841 is connected to the ninth interface 1035 of the second linkage two-way valve 104, and the fourth refrigerant pipe 842 is connected to the tenth interface 1036 of the second linkage two-way valve 104. The liquid inlet 71 of the environmental heat exchanger 7 is connected to the seventh interface 1033 of the second linkage two-way valve 104, and the liquid outlet 72 is connected to the eighth interface 1034 of the second linkage two-way valve 104.

[0127] Each time it is used, the states of the first double two-way valve 103 and the second double two-way valve 104 are opposite, that is, when the first double two-way valve 103 is in the open position, the second double two-way valve 104 is in the closed position, at which time the second subcooling and heating branch 83 is connected to the ambient heat exchanger to absorb heat by subcooling. Conversely, when the first double two-way valve 103 is in the closed position, the second double two-way valve 104 is in the open position, at which time the second heat dissipation branch 84 is connected to the ambient heat exchanger to release heat by superheating.

[0128] When it is not necessary to start the heat absorption and heat dissipation balance, the first double two-way valve 103 and the second double two-way valve 104 can be closed at the same time.

[0129] For other contents of the heat pump system for hot and cold water supply described in the present invention, please refer to the prior art and will not be described in detail here.

[0130] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A heat pump system for hot and cold water supply, characterized in that: Including heat transfer system and environmental heat exchange system; The heat transfer system includes a hot water tank, a cold water tank and a heat pump pipeline; the heat pump pipeline includes a heat absorption pipeline, a compressor, a heat release pipeline and an expansion valve, and the heat absorption pipeline, the compressor, the heat release pipeline and the expansion valve are connected end to end in sequence to form a heat exchange loop; the heat absorption pipeline is connected to the cold water tank to absorb heat; the heat release pipeline is connected to the hot water tank to release heat; The environmental heat exchange system comprises an environmental heat exchanger and an environmental heat exchange pipeline, wherein the environmental heat exchanger is connected to the heat transfer system through the environmental heat exchange pipeline, and is used to exchange heat between the heat transfer system and the environment where the environmental heat exchanger is located; The heat absorption pipeline is a first coil heat exchanger, which is arranged in the cold water tank, and the two ends of the first coil heat exchanger are respectively connected to the expansion valve and the compressor; The heat release pipeline is a second coil heat exchanger, which is arranged in the hot water tank, and the two ends of the second coil heat exchanger are respectively connected to the expansion valve and the compressor; The environmental heat exchange pipeline comprises a first supercooling and heating branch with switchable connection state and a first superheating and heat dissipation branch with switchable connection state, wherein the first supercooling and heating branch and the first superheating and heat dissipation branch are not connected at the same time; The first supercooling and heating branch includes a cold water inlet pipe and a heating drain pipe, the cold water inlet pipe is connected to the heating drain pipe through the environmental heat exchanger, and the water inlet of the cold water inlet pipe and the water outlet of the heating drain pipe are both connected to the cold water tank; The first overheating heat dissipation branch includes a hot water inlet pipe and a cooling drain pipe, the hot water inlet pipe is connected to the cooling drain pipe through the environmental heat exchanger, and the water inlet of the hot water inlet pipe and the water outlet of the cooling drain pipe are both connected to the hot water tank; The environmental heat exchanger is provided with a liquid inlet and a liquid outlet; It also includes a double four-way valve; the double four-way valve includes a valve body and a valve core provided with a valve cavity, the valve body is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface and a sixth interface; the valve core is arranged in the valve cavity and can be switched between a first position and a second position; the valve core is provided with a first channel, a second channel and a third channel; When the valve core is in the first position, the first channel connects the first interface with the third interface, and the second channel connects the second interface with the fourth interface; When the valve core is in the second position, the third channel connects the first interface with the fifth interface, and the fourth channel formed between the end of the valve core and the inner wall of the valve cavity connects the second interface with the sixth interface; The liquid inlet of the environmental heat exchanger is connected to the first interface, and the liquid outlet is connected to the second interface; The third interface is connected to the cold water inlet pipe, and the fourth interface is connected to the heating drain pipe; The fifth interface is connected to the hot water inlet pipe, and the sixth interface is connected to the cooling drain pipe.

2. The heat pump system for hot and cold water supply according to claim 1, characterized in that: The double four-way valve also includes an electromagnetic component for adsorbing and controlling the valve core to switch positions.

3. The heat pump system for hot and cold water supply according to claim 1, characterized in that: The environmental heat exchanger is a condenser arranged outdoors or a third coil heat exchanger arranged in an external water body.

4. The heat pump system for hot and cold water supply according to claim 1, characterized in that: The cold water tank and / or the hot water tank has a heat-insulating outer shell.

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