Heat pump system

Abstract

The invention discloses a heat pump system, which relates to the technical field of heat pumps and comprises a compressor, a water-fluorine heat exchanger and an outdoor heat exchanger, the water-fluorine heat exchanger comprises a waterway pipe and a fluorine heat exchange pipe, the waterway pipe is used for allowing water to flow, and a loop for allowing a refrigerant to flow is formed among the compressor, the fluorine heat exchange pipe and the outdoor heat exchanger, so that the refrigerant in the fluorine heat exchange pipe can exchange heat with water in the waterway pipe; the first four-way valve is used for changing the flowing direction of a refrigerant, so that the refrigerant flowing out of the exhaust end of the compressor can flow through the fluorine heat exchange pipe firstly and then flow through the outdoor heat exchanger, or the refrigerant flowing out of the exhaust end of the compressor can flow through the outdoor heat exchanger firstly and then flow through the fluorine heat exchange pipe; and the flow direction control piece is used for enabling the flowing direction of a refrigerant in the fluorine heat exchange pipe to be kept opposite to the flowing direction of water in the waterway pipe. No matter the heat pump system is in a heating mode or a refrigerating mode, countercurrent flow heat exchange can be kept all the time, and the heat exchange effect of the heat pump system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pumps, and in particular to a heat pump system. Background Art

[0002] A heat pump system is a device that can use the heat energy in natural air for heating or cooling. A water-fluorine heat exchanger is a device that uses refrigerant and water for heat exchange. Its working principle is based on the principle of heat conduction. When water flows through the heat exchanger, it exchanges heat with the refrigerant, thereby achieving the purpose of cooling or heating the water. In the prior art, when the heat pump system is in heating mode, the refrigerant and water in the water-fluorine heat exchanger are countercurrent heat exchangers. Because the flow direction of the water in the user's home is constant, when the heat pump system is in cooling mode, the flow direction of the refrigerant in the water-fluorine heat exchanger will inevitably change, so that the refrigerant and water must be in downstream heat exchange, that is, the heat pump system cannot achieve countercurrent heat exchange for heating and cooling, which reduces the heat exchange effect of the heat pump system. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a heat pump system, which can improve the heat exchange effect of the heat pump system.

[0004] According to an embodiment of the present invention, the heat pump system includes a compressor, a water-fluorine heat exchanger and an outdoor heat exchanger; the water-fluorine heat exchanger includes a water pipe and a fluorine heat exchange pipe, the water pipe is used for water flow, and a loop for refrigerant flow is formed between the compressor, the fluorine heat exchange pipe and the outdoor heat exchanger, so that the refrigerant in the fluorine heat exchange pipe can exchange heat with the water in the water pipe; a first four-way valve, the first four-way valve is used to change the flow direction of the refrigerant, so that the refrigerant flowing out of the exhaust end of the compressor can first flow through the fluorine heat exchange pipe and then flow through the outdoor heat exchanger, or the refrigerant flowing out of the exhaust end of the compressor can first flow through the outdoor heat exchanger and then flow through the fluorine heat exchange pipe; a flow direction control component, the flow direction control component is used to keep the flow direction of the refrigerant in the fluorine heat exchange pipe opposite to the flow direction of water in the water pipe.

[0005] At least the following beneficial effects:

[0006] The water pipes in the water-fluorine heat exchanger are connected to the water system installed in the user's home, so the flow direction of the water in the water pipes is constant. The flow control component can control the flow direction of the refrigerant in the fluorine heat exchange tubes, so that no matter whether the heat pump system is in heating mode or cooling mode, the flow direction of the refrigerant in the fluorine heat exchange tubes can be kept opposite to the flow direction of the water in the water pipes, that is, the refrigerant in the fluorine heat exchange tubes and the water in the water pipes can always maintain countercurrent heat exchange, so that the heat pump system can achieve countercurrent heat exchange for both heating and cooling, which improves the heat exchange effect of the water-fluorine heat exchanger, and thus improves the heat exchange effect of the heat pump system.

[0007] According to the heat pump system of an embodiment of the present invention, the first four-way valve has a C1 interface, an S1 interface, an E1 interface and a D1 interface, the exhaust end of the compressor is connected to the D1 interface, the suction pipe of the compressor is connected to the S1 interface, the E1 interface is connected to the fluorine heat exchange tube, the C1 interface is connected to the outdoor heat exchanger, the outdoor heat exchanger is connected to the fluorine heat exchange tube, the D1 interface can be connected to the E1 interface, and the C1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor first flows through the fluorine heat exchange tube and then flows through the outdoor heat exchanger, the D1 interface can be connected to the C1 interface, and the E1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor first flows through the outdoor heat exchanger and then flows through the fluorine heat exchange tube.

[0008] According to the heat pump system of an embodiment of the present invention, the flow direction control component is a second four-way valve, the C1 interface is connected to the two ends of the outdoor heat exchanger, the second four-way valve has a C2 interface, an S2 interface, an E2 interface and a D2 interface, the D2 interface is connected to the E1 interface, the S2 interface is connected to the first end of the outdoor heat exchanger, the E2 interface is connected to the second end of the fluorine heat exchange tube, the C2 interface is connected to the first end of the fluorine heat exchange tube, the D2 interface can be connected to the E2 interface, the C2 interface can be connected to the S2 interface, so that the refrigerant flows from the second end of the fluorine heat exchange tube to the first end of the fluorine heat exchange tube, the D2 interface can be connected to the C2 interface, and the E2 interface can be connected to the S2 interface, so that the refrigerant flows from the second end of the fluorine heat exchange tube to the first end of the fluorine heat exchange tube.

[0009] The heat pump system according to the embodiment of the present invention further includes a throttling element, and the S2 interface is connected to the first end of the outdoor heat exchanger through the throttling element.

[0010] According to the heat pump system of an embodiment of the present invention, the first four-way valve includes a first main valve, the first main valve has a C1 interface, an S1 interface, an E1 interface and a D1 interface, the exhaust end of the compressor is connected to the D1 interface, the suction pipe of the compressor is connected to the S1 interface, the E1 interface is connected to the fluorine heat exchange tube, the C1 interface is connected to the outdoor heat exchanger, the outdoor heat exchanger is connected to the fluorine heat exchange tube, the D1 interface can be connected to the E1 interface, the C1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor first flows through the fluorine heat exchange tube and then flows through the outdoor heat exchanger, the D1 interface can be connected to the C1 interface, and the E1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor first flows through the outdoor heat exchanger and then flows through the fluorine heat exchange tube.

[0011] According to the heat pump system of an embodiment of the present invention, the first four-way valve also includes a pilot valve, an electromagnetic coil and a first main valve, the electromagnetic coil is arranged on the pilot valve, and the first port and the second port are respectively arranged at both ends of the first main valve, the pilot valve has a C3 interface, an S3 interface, an E3 interface and a D3 interface, the D3 interface is communicated with the exhaust end of the compressor, the S3 interface is communicated with the suction end of the compressor, the E3 interface is communicated with the first port, and the C3 interface is communicated with the second port, the electromagnetic coil can be in a power-off state so that the D3 interface is communicated with the E3 interface, the S3 interface is communicated with the C3 interface, and the D1 interface is communicated with the E1 interface, and the C1 interface is communicated with the S1 interface, the electromagnetic coil can be in a power-on state so that the D3 interface is communicated with the C3 interface, the E3 interface is communicated with the S3 interface, and the D1 interface is communicated with the C1 interface, and the E1 interface is communicated with the S1 interface.

[0012] According to the heat pump system of the embodiment of the present invention, the flow direction control component is a second main valve, the C1 interface is connected to the second end of the outdoor heat exchanger, the second main valve has a C2 interface, an S2 interface, an E2 interface and a D2 interface, and the second main valve is provided with a third port and a fourth port at both ends, respectively, the D2 interface is connected to the E1 interface, the S2 interface is connected to the first end of the outdoor heat exchanger, the E2 interface is connected to the second end of the fluorine heat exchange tube, the C2 interface is connected to the first end of the fluorine heat exchange tube, the third port is connected to the E3 interface, and the fourth port is connected to the C3 interface. The electromagnetic coil can be in a power-off state so that the D2 interface is connected to the E2 interface, the S2 interface is connected to the C2 interface, and the refrigerant flows from the second end of the fluorine heat exchange tube to the first end of the fluorine heat exchange tube, and the electromagnetic coil can be in a power-on state so that the D2 interface is connected to the C2 interface, the E2 interface is connected to the S2 interface, and the refrigerant flows from the second end of the fluorine heat exchange tube to the first end of the fluorine heat exchange tube.

[0013] The heat pump system according to the embodiment of the present invention further includes a throttling element, and the S2 interface is connected to the first end of the outdoor heat exchanger through the throttling element.

[0014] According to the heat pump system of the embodiment of the present invention, the outdoor heat exchanger is an air-cooled heat exchanger.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 It is a schematic diagram of the refrigerant flow in a traditional heat pump system in heating mode;

[0018] Figure 2 It is a schematic diagram of the refrigerant flow in the traditional heat pump system in cooling mode;

[0019] Figure 3 It is a schematic diagram of the refrigerant flow of the heat pump system in the heating mode according to the first embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the refrigerant flow of the heat pump system in the cooling mode according to the first embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the structure of a first main valve, a second main valve and a pilot valve in a heat pump system according to a second embodiment of the present invention;

[0022] Figure 6 A schematic diagram of refrigerant flow in a heat pump system in a heating mode according to a second embodiment of the present invention;

[0023] Figure 7 A schematic diagram of refrigerant flow in a heat pump system in a cooling mode according to a second embodiment of the present invention;

[0024] Reference numerals:

[0025] A first four-way valve 100; a first main valve 110; a first port 111; a second port 112;

[0026] Second four-way valve 200; second main valve 210; third port 211; fourth port 212;

[0027] Pilot valve 300; electromagnetic coil 310;

[0028] Compressor 400;

[0029] Water-fluorine heat exchanger 500; water pipe 510; water inlet 511; water outlet 512; fluorine heat exchange pipe 520;

[0030] Outdoor heat exchanger 600;

[0031] Throttle element 700 . DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] It should be explained that the reference Figure 1 and Figure 2 The arrow in the figure indicates the flow direction of the refrigerant. The water-fluorine heat exchanger 500 includes a water pipe 510 and a fluorine heat exchange pipe 520. In the embodiment of the present invention, Figure 1 , countercurrent heat exchange means that the flow direction of water in the water pipe 510 is opposite to the flow direction of the refrigerant in the fluorine heat exchange tube 520. Figure 2 , downstream heat exchange means that the flow direction of water in the water pipe 510 is the same as the flow direction of the refrigerant in the fluorine heat exchange tube 520. In the countercurrent heat exchange mode, when the heat of the refrigerant is transferred to the water, their contact surfaces always maintain a large temperature difference, which can improve the heat transfer efficiency, that is, improve the heat exchange effect of the water-fluorine heat exchanger 500 and the heat pump system. In the downstream heat exchange mode, the temperature difference between the refrigerant and the water gradually decreases as the refrigerant and the water flow, resulting in a lower heat exchange efficiency, that is, reducing the heat exchange effect of the water-fluorine heat exchanger 500 and the heat pump system.

[0037] refer to Figure 3 and Figure 4 The heat pump system according to the embodiment of the present invention includes a compressor 400, a water-fluorine heat exchanger 500, an outdoor heat exchanger 600, a first four-way valve 100 and a flow direction control element.

[0038] The water-fluorine heat exchanger 500 includes a water pipe 510 and a fluorine heat exchange pipe 520. The water pipe 510 is used for water flow. A loop for refrigerant flow is formed between the compressor 400, the fluorine heat exchange pipe 520 and the outdoor heat exchanger 600, so that the refrigerant in the fluorine heat exchange pipe 520 can exchange heat with the water in the water pipe 510.

[0039] A first four-way valve 100, which is used to change the flow direction of the refrigerant so that the refrigerant flowing out of the exhaust end of the compressor 400 can first flow through the fluorine heat exchange tube 520 and then flow through the outdoor heat exchanger 600, or the refrigerant flowing out of the exhaust end of the compressor 400 can first flow through the outdoor heat exchanger 600 and then flow through the fluorine heat exchange tube 520;

[0040] The flow direction control component is used to keep the flow direction of the refrigerant in the fluorine heat exchange tube 520 opposite to the flow direction of the water in the water pipe 510.

[0041] refer to Figure 3When the heat pump system is in the heating mode, the first four-way valve 100 can be switched to the first state, so that the refrigerant flowing out from the exhaust end of the compressor 400 first flows through the fluorine heat exchange tube 520 in the water-fluorine heat exchanger 500, then flows through the outdoor heat exchanger 600, and finally flows into the air inlet end of the compressor 400. This cycle allows the refrigerant in the fluorine heat exchange tube 520 to transfer heat to the water in the water pipe 510 to complete the heating of the water in the water pipe 510.

[0042] refer to Figure 4 When the heat pump system is in cooling mode, the first four-way valve 100 can be switched to the second state, so that the refrigerant flowing out from the exhaust end of the compressor 400 first flows through the outdoor heat exchanger 600, then flows through the fluorine heat exchange tube 520 in the water-fluorine heat exchanger 500, and finally flows into the air inlet end of the compressor 400. This cycle allows the refrigerant in the fluorine heat exchange tube 520 to absorb the heat of the water in the water pipe 510 to complete the cooling of the water in the water pipe 510.

[0043] It is understandable that the water pipe 510 in the water-fluorine heat exchanger 500 is connected to the water system installed in the user's home, so the flow direction of the water in the water pipe 510 is constant. The flow control component can control the flow direction of the refrigerant in the fluorine heat exchange tube 520, so that whether the heat pump system is in heating mode or cooling mode, the flow direction of the refrigerant in the fluorine heat exchange tube 520 can be kept opposite to the flow direction of the water in the water pipe 510, that is, the refrigerant in the fluorine heat exchange tube 520 and the water in the water pipe 510 can always maintain countercurrent heat exchange, so that the heat pump system can achieve countercurrent heat exchange for heating and cooling, thereby improving the heat exchange effect of the water-fluorine heat exchanger 500, and further improving the heat exchange effect of the heat pump system.

[0044] In the embodiment of the present invention, reference Figure 3 The water pipe 510 has a water inlet 511 and a water outlet 512. The flow direction of water in the water pipe 510 is from the water inlet 511 to the water outlet 512, and the flow direction of water in the water pipe 510 is always constant. The fluorine heat exchange tube 520 has a first end and a second end. The water inlet 511 of the water pipe 510 corresponds to the first end of the fluorine heat exchange tube 520, and the water outlet 512 of the water pipe 510 corresponds to the second end of the fluorine heat exchange tube 520. Countercurrent heat exchange means that the flow direction of the refrigerant in the fluorine heat exchange tube 520 is from the second end of the fluorine heat exchange tube 520 to the first end of the fluorine heat exchange tube 520. In other words, the flow control component can make the flow direction of the refrigerant in the fluorine heat exchange tube 520 always flow from the second end of the fluorine heat exchange tube 520 to the first end of the fluorine heat exchange tube 520.

[0045] refer to Figure 3 and Figure 4The first four-way valve 100 has a C1 interface, an S1 interface, an E1 interface and a D1 interface. The exhaust end of the compressor 400 is connected to the D1 interface, the suction pipe of the compressor 400 is connected to the S1 interface, the E1 interface is connected to the fluorine heat exchange pipe 520, the C1 interface is connected to the outdoor heat exchanger 600, and the outdoor heat exchanger 600 is connected to the fluorine heat exchange pipe 520. The D1 interface can be connected to the E1 interface, and the C1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor 400 can first flow through the fluorine heat exchange pipe 520 and then flow through the outdoor heat exchanger 600. The D1 interface can be connected to the C1 interface, and the E1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor 400 can first flow through the outdoor heat exchanger 600 and then flow through the fluorine heat exchange pipe 520.

[0046] It can be understood that when the first four-way valve 100 is switched to the first state, the D1 interface is connected to the E1 interface, and the C1 interface is connected to the S1 interface, so that the refrigerant flowing out from the exhaust end of the compressor 400 can first flow into the fluorine heat exchange tube 520 and then flow into the outdoor heat exchanger 600, so that the refrigerant releases heat in the fluorine heat exchange tube 520 and absorbs heat in the outdoor heat exchanger 600, thereby allowing the heat of the refrigerant in the fluorine heat exchange tube 520 to be transferred to the water in the water pipe 510 to complete the heating of the water, that is, the heat pump system is in heating mode at this time.

[0047] When the first four-way valve 100 is switched to the second state, the D1 interface is connected to the C1 interface, and the E1 interface is connected to the S1 interface. The refrigerant flowing out from the exhaust end of the compressor 400 can first flow into the outdoor heat exchanger 600 and then flow into the fluorine heat exchange tube 520, so that the refrigerant absorbs heat in the fluorine heat exchange tube 520 and releases heat in the outdoor heat exchanger 600, thereby allowing the refrigerant in the fluorine heat exchange tube 520 to absorb the heat of the water in the water pipe 510 to complete the cooling of the water. That is, the heat pump system is in cooling mode at this time.

[0048] As a first embodiment of the present invention, refer to Figure 3 and Figure 4 The flow direction control component is a second four-way valve 200, the C1 interface is connected to the second end of the outdoor heat exchanger 600, the second four-way valve 200 has a C2 interface, an S2 interface, an E2 interface and a D2 interface, the D2 interface is connected to the E1 interface, the S2 interface is connected to the first end of the outdoor heat exchanger 600, the E2 interface is connected to the second end of the fluorine heat exchange tube 520, the C2 interface is connected to the first end of the fluorine heat exchange tube 520, the D2 interface can be connected to the E2 interface, the C2 interface can be connected to the S2 interface, so that the refrigerant flows from the second end of the fluorine heat exchange tube 520 to the first end of the fluorine heat exchange tube 520, the D2 interface can be connected to the C2 interface, and the E2 interface can be connected to the S2 interface, so that the refrigerant flows from the second end of the fluorine heat exchange tube 520 to the first end of the fluorine heat exchange tube 520.

[0049] It can be understood that when the first four-way valve 100 is switched to the first state and the heat pump system is in the heating state, the D1 interface is connected to the E1 interface, and the C1 interface is connected to the S1 interface. At this time, the second four-way valve 200 is synchronously switched to the first state, so that the D2 interface is connected to the E2 interface, and the C2 interface is connected to the S2 interface. Figure 3 When the first four-way valve and the second four-way valve 200 are synchronously in the first state, the refrigerant flowing out of the exhaust end of the compressor 400 first flows into the second end of the fluorine heat exchange tube 520 through the D1 interface, the E1 interface, the D2 interface and the E2 interface, and then flows out from the first end of the fluorine heat exchange tube 520 and flows into the first end of the outdoor heat exchanger 600. At this time, the flow direction of the refrigerant in the fluorine heat exchange tube 520 is from the second end of the fluorine heat exchange tube 520 to the first end of the fluorine heat exchange tube 520, and the flow direction of the water in the water pipe 510 is from the water inlet 511 to the water outlet 512, so that the flow direction of the refrigerant in the fluorine heat exchange tube 520 is opposite to the flow direction of the water in the water pipe 510, so that the heat pump system can achieve countercurrent heat exchange in the heat exchange mode. The refrigerant in the outdoor heat exchanger 600 flows into the suction end of the compressor 400 through the second end of the outdoor heat exchanger 600, the C1 interface and the S2 interface.

[0050] When the first four-way valve 100 is switched to the second state and the heat pump system is in the cooling state, the D1 interface is connected to the C1 interface, and the E1 interface is connected to the S1 interface. At this time, the second four-way valve 200 is synchronously switched to the second state, so that the D2 interface is connected to the C2 interface, and the E2 interface is connected to the S2 interface. Figure 4 When the first four-way valve and the second four-way valve 200 are synchronously in the second state, the refrigerant flowing out from the exhaust end of the compressor 400 will first flow into the second end of the outdoor fluorine heat exchange pipe 520 through the D1 interface and the C1 interface, and then flow out from the first end of the outdoor fluorine heat exchange pipe 520 and flow into the second end of the fluorine heat exchange pipe 520 through the S2 interface and the E2 interface. Then the refrigerant in the fluorine heat exchange pipe 520 will flow out from the first end of the fluorine heat exchange pipe 520 and flow into the suction end of the compressor 400 through the C2 interface, the D2 interface, the E1 interface and the S1 interface. At this time, the flow direction of the refrigerant in the fluorine heat exchange pipe 520 is from the second end of the fluorine heat exchange pipe 520 to the first end of the fluorine heat exchange pipe 520, and the flow direction of the water in the water pipe 510 is from the water inlet 511 to the water outlet 512, so that the flow direction of the refrigerant in the fluorine heat exchange pipe 520 is opposite to the flow direction of the water in the water pipe 510, so that the heat pump system can achieve countercurrent heat exchange in the cooling mode.

[0051] It is not difficult to see that in the first embodiment of the present invention, the second four-way valve 200 can keep the refrigerant in the fluorine heat exchange tube 520 unchanged in both cooling mode and heating mode, even if the flow direction of the refrigerant in the fluorine heat exchange tube 520 is always opposite to the flow direction of the water in the water pipe 510, ensuring that the heat pump system can perform countercurrent heat exchange in both heating and cooling modes, which is beneficial to improving the heat exchange effect of the heat pump system.

[0052] In the first embodiment of the present invention, the heat pump system further includes a throttling element 700, and the S2 interface is connected to the first end of the outdoor heat exchanger 600 through the throttling element 700. The throttling element 700 can be a thermal expansion valve, an electronic expansion valve or a capillary tube. The throttling element 700 is a common element in the heat pump system and will not be further described here.

[0053] In the first embodiment of the present invention, the first four-way valve 100 and the second four-way valve 200 are both common valve components used to change the flow direction of the refrigerant in the heat exchange system. The first four-way valve 100 is used to switch the heat pump system back and forth between the heating mode and the cooling mode, and the second four-way valve 200 is used to enable the heat pump system to always perform countercurrent heat exchange.

[0054] As a second embodiment of the present invention, refer to Figures 5 to 7 The first four-way valve 100 includes a pilot valve 300, an electromagnetic coil 310 and a first main valve 110. The electromagnetic coil 310 is arranged on the pilot valve 300. The first main valve 110 has a C1 interface, an S1 interface, an E1 interface and a D1 interface. The first main valve 110 has a first port 111 and a second port 112 at both ends. The pilot valve 300 has a C3 interface, an S3 interface, an E3 interface and a D3 interface. The exhaust end of the compressor 400 is connected to the D1 interface, the suction pipe of the compressor 400 is connected to the S1 interface, the E1 interface is connected to the fluorine heat exchange pipe 520, the C1 interface is connected to the outdoor heat exchanger 600, and the outdoor heat exchanger 600 It is connected to the fluorine heat exchange tube 520, the D3 interface is connected to the exhaust end of the compressor 400, the S3 interface is connected to the intake end of the compressor 400, the E3 interface is connected to the first port 111, and the C3 interface is connected to the second port 112. The electromagnetic coil 310 can be in a power-off state to make the D3 interface connected to the E3 interface, the S3 interface connected to the C3 interface, and the D1 interface connected to the E1 interface, and the C1 interface connected to the S1 interface. The electromagnetic coil 310 can be in a power-on state to make the D3 interface connected to the C3 interface, the E3 interface connected to the S3 interface, and the D1 interface connected to the C1 interface, and the E1 interface connected to the S1 interface.

[0055] In a second embodiment of the present invention, reference Figure 5, a sliding cavity is provided in the pilot valve 300, a slider and a spring are provided in the sliding cavity, one end of the spring is connected to one end of the inner wall of the sliding cavity, and the other end of the spring is connected to the slider. The electromagnetic coil 310 is provided on one end of the pilot valve 300 close to the E3 interface, and the electromagnetic coil 310 is electromagnetically connected to the slider. When the electromagnetic coil 310 is in a power-off state, the spring is in an extended state, and the slider moves away from the electromagnetic coil 310 under the push of the spring. At this time, the D3 interface is connected to the E3 interface, and the S3 interface is connected to the C3 interface. When the electromagnetic coil 310 is in a power-on state, the electromagnetic coil 310 magnetically attracts the slider, causing the slider to slide in the direction close to the electromagnetic coil 310, and compresses the spring. At this time, the D3 interface is connected to the C3 interface, and the E3 interface is connected to the S3 interface. The pilot valve 300 is a common auxiliary valve, which will not be further described here.

[0056] refer to Figure 5 A first piston chamber is formed on the first main valve 110, in which a first piston is arranged, and two ends of the first piston chamber are respectively connected with a first port 111 and a second port 112, the first port 111 is connected with an E3 interface of the pilot valve 300, the second port 112 is connected with a C3 interface of the pilot valve 300, the D3 interface of the pilot valve 300 is connected with an exhaust end of the compressor 400, and the S3 of the pilot valve 300 is connected with an intake end of the compressor 400.

[0057] refer to Figure 6 When the heat pump system is switched to the heating mode, the electromagnetic coil 310 is in the power-off state, the D3 interface is connected to the E3 interface, and the S3 interface is connected to the C3 interface. Since the D3 interface of the pilot valve 300 is connected to the exhaust end of the compressor 400, and the E3 interface of the pilot valve 300 is connected to the first port 111 on the first main valve 110, part of the high-pressure refrigerant flowing out of the exhaust end of the compressor 400 can flow into the first piston cavity through the D3 interface and the E3 interface of the pilot valve 300, so that the first piston cavity between the first piston and the first port 111 forms a high-pressure area. And because the suction end of the compressor 400 is connected to the second port 112 on the first main valve 110 through the C3 interface and the S3 interface of the pilot valve 300, the first piston cavity between the first piston and the second port 112 forms a low-pressure area. Since the two sides of the first piston are high-pressure areas and low-pressure areas respectively, the first piston moves toward the second port 112 at this time, so that the D1 interface on the first main valve 110 is connected with the E1 interface, and the C1 interface is connected with the S1 interface, so that the first main valve 110 is in the first state.

[0058] After the first main valve 110 is in the first state, the refrigerant flowing out of the exhaust end of the compressor 400 flows into the fluorine heat exchange pipe 520 through the D1 interface and the E1 interface. Then, the refrigerant flowing out of the fluorine heat exchange pipe 520 flows into the outdoor heat exchanger 600. Finally, the refrigerant flowing out of the outdoor heat exchanger 600 flows back into the suction end of the compressor 400 through the C1 interface and the S1 interface, and the cycle is repeated to complete the heating of the water in the water pipe 510.

[0059] refer to Figure 7 When the heat pump system is switched to the cooling mode, the electromagnetic coil 310 is in the energized state, the D3 interface is connected to the C3 interface, and the E3 interface is connected to the S3 interface. Since the D3 interface of the pilot valve 300 is connected to the exhaust end of the compressor 400, and the C3 interface of the pilot valve 300 is connected to the second port 112 on the first main valve 110, part of the high-pressure refrigerant flowing out of the exhaust end of the compressor 400 can flow into the first piston cavity through the D3 interface and the C3 interface of the pilot valve 300, so that the first piston cavity between the first piston and the second port 112 forms a high-pressure area. And because the suction end of the compressor 400 is connected to the first port 111 on the first main valve 110 through the S3 interface and the E3 interface of the pilot valve 300, the first piston cavity between the first piston and the first port 111 forms a low-pressure area. Since the two sides of the second piston are low-pressure and high-pressure areas respectively, the first piston moves toward the first port 111 at this time, so that the D1 interface on the first main valve 110 is connected with the C1 interface, and the E1 interface is connected with the S1 interface, so that the first main valve 110 is in the second state.

[0060] After the first main valve 110 is in the second state, the refrigerant flowing out of the exhaust end of the compressor 400 flows into the outdoor heat exchanger 600 through the D1 interface and the C1 interface. Then, the refrigerant flowing out of the outdoor heat exchanger 600 flows into the fluorine heat exchange tube 520. Finally, the refrigerant flowing out of the fluorine heat exchange tube 520 flows back into the suction end of the compressor 400 through the E1 interface and the S1 interface, and the cycle is repeated to complete the refrigeration of the water in the water pipe 510.

[0061] In order to enable the heat pump system to switch back and forth between the cooling mode and the heating mode, and also to enable the heat pump system to always maintain countercurrent heat exchange, the heat pump system needs to be equipped with two four-way valves. Because a four-way valve includes a pilot valve 300 and a main valve, the heat pump system needs to be equipped with at least four valves to achieve countercurrent heat exchange and mode switching of the heat pump system. The more valves there are, the greater the manufacturing cost of the heat pump system, so the manufacturing cost of the heat pump system that can achieve countercurrent heat exchange and mode switching is higher.

[0062] In the second embodiment of the present invention, reference 5 to Figure 7The flow control element is the second main valve 210, the C1 interface is connected to the second end of the outdoor heat exchanger 600, the second main valve 210 has a C2 interface, an S2 interface, an E2 interface and a D2 interface, and the two ends of the second main valve 210 are respectively provided with a third port 211 and a fourth port 212, the D2 interface is connected to the E1 interface, the S2 interface is connected to the first end of the outdoor heat exchanger 600, the E2 interface is connected to the second end of the fluorine heat exchange tube 520, the C2 interface is connected to the first end of the fluorine heat exchange tube 520, and the third port 2 11 is connected with the E3 interface, the fourth port 212 is connected with the C3 interface, the electromagnetic coil 310 can be in a power-off state, so that the D2 interface is connected with the E2 interface, the S2 interface is connected with the C2 interface, and the refrigerant flows from the second end of the fluorine heat exchange tube 520 to the first end of the fluorine heat exchange tube 520, the electromagnetic coil 310 can be in a power-on state, so that the D2 interface is connected with the C2 interface, the E2 interface is connected with the S2 interface, and the refrigerant flows from the second end of the fluorine heat exchange tube 520 to the first end of the fluorine heat exchange tube 520.

[0063] In a second embodiment of the present invention, reference Figure 6 A second piston chamber is formed on the second main valve 210, and a second piston is arranged in the second piston chamber. The two ends of the second piston chamber are respectively connected with the third port 211 and the fourth port 212, the third port 211 is connected with the E3 interface of the pilot valve 300, the fourth port 212 is connected with the C3 interface of the pilot valve 300, the D3 interface of the pilot valve 300 is connected with the exhaust end of the compressor 400, and the S3 of the pilot valve 300 is connected with the suction end of the compressor 400.

[0064] refer to Figure 6 When the heat pump system is switched to the heating mode, the electromagnetic coil 310 is in the power-off state, at which time the D3 interface is connected to the E3 interface, and the S3 interface is connected to the C3 interface. Since the D3 interface of the pilot valve 300 is connected to the exhaust end of the compressor 400, and the E3 interface of the pilot valve 300 is simultaneously connected to the first port 111 on the first main valve 110 and the third port 211 on the second main valve 210, part of the high-pressure refrigerant flowing out of the exhaust end of the compressor 400 can be diverted to the first port 111 on the first main valve 110 and the third port 211 on the second main valve 210 through the D3 interface and the E3 interface of the pilot valve 300, so that the first piston cavity between the first piston and the first port 111 forms a high-pressure area, and the second piston cavity between the second piston and the third port 211 forms a high-pressure area.

[0065] Because the suction end of the compressor 400 is simultaneously connected to the second port 112 on the first main valve 110 and the fourth port 212 on the second main valve 210 through the C3 interface and the S3 interface of the pilot valve 300, a low-pressure zone is formed in the first piston cavity between the first piston and the second port 112, and a low-pressure zone is formed in the second piston cavity between the second piston and the fourth port 212. At this time, the first piston moves toward the direction close to the second port 112, and the second piston moves toward the direction close to the fourth port 212, so that the D1 interface on the first main valve 110 is connected to the E1 interface, and the C1 interface is connected to the S1 interface, so that the first main valve 110 is in the first state. At the same time, the D2 interface on the first main valve 110 is connected to the E2 interface, and the C2 interface is connected to the S2 interface, so that the second main valve 210 is in the first state.

[0066] After the first main valve 110 is in the first state and the second main valve 210 is in the first state, the refrigerant flowing out from the exhaust end of the compressor 400 flows into the second end of the fluorine heat exchange tube 520 through the D1 interface, the E1 interface, the D2 interface and the E2 interface. Then the refrigerant flow in the fluorine heat exchange tube 520 flows out from the first end of the fluorine heat exchange tube 520 and flows into the first end of the outdoor heat exchanger 600 through the C2 interface and the S2 interface, so that the flow direction of the refrigerant in the fluorine heat exchange tube 520 is opposite to the flow direction of the water in the water pipe 510. Finally, the refrigerant in the outdoor heat exchanger 600 flows out from the second end of the outdoor heat exchanger 600 and flows into the suction end of the compressor 400 through the C1 interface and the S1 interface, and the cycle is repeated, so that the heat pump system can be switched to the heating mode while ensuring that the heat pump system is in countercurrent heat exchange.

[0067] refer to Figure 7 When the heat pump system is switched to the cooling mode, the electromagnetic coil 310 is in the energized state, at which time the D3 interface is connected to the C3 interface, and the E3 interface is connected to the S3 interface. Since the D3 interface of the pilot valve 300 is connected to the exhaust end of the compressor 400, and the C3 interface of the pilot valve 300 is simultaneously connected to the second port 112 on the first main valve 110 and the fourth port 212 on the second main valve 210, part of the high-pressure refrigerant flowing out of the exhaust end of the compressor 400 can be diverted to the second port 112 on the first main valve 110 and the fourth port 212 on the second main valve 210 through the D3 interface and the C3 interface of the pilot valve 300, so that the first piston cavity between the first piston and the second port 112 forms a high-pressure area, and the second piston cavity between the second piston and the fourth port 212 forms a high-pressure area.

[0068] Because the suction end of the compressor 400 is simultaneously connected to the first port 111 on the first main valve 110 and the third port 211 on the second main valve 210 through the S3 interface and the E3 interface of the pilot valve 300, a low-pressure zone is formed in the first piston cavity between the first piston and the first port 111, and a low-pressure zone is formed in the second piston cavity between the second piston and the third port 211. At this time, the first piston moves toward the direction close to the first port 111, and the second piston moves toward the direction close to the third port 211, so that the D1 interface on the first main valve 110 is connected to the C1 interface, and the E1 interface is connected to the S1 interface, so that the first main valve 110 is in the second state. At the same time, the D2 interface on the second main valve 210 is connected to the C2 interface, and the E2 interface is connected to the S2 interface, so that the second main valve 210 is in the second state.

[0069] After the first main valve 110 is in the second state and the second main valve 210 is in the second state, the refrigerant flowing out from the exhaust end of the compressor 400 flows into the second end of the outdoor heat exchanger 600 through the D1 interface and the C1 interface. Then the refrigerant flow in the outdoor heat exchanger 600 flows out from the first end of the outdoor heat exchanger 600 and flows into the second end of the fluorine heat exchange tube 520 through the S2 interface and the E2 interface. The refrigerant in the fluorine heat exchange tube 520 flows out from the first end of the fluorine heat exchange tube 520, so that the flow direction of the refrigerant in the fluorine heat exchange tube 520 is opposite to the flow direction of the water in the water pipe 510. Finally, the refrigerant flowing out from the first end of the fluorine heat exchange tube 520 flows into the suction end of the compressor 400 through the C2 interface, the D2 interface, the E1 interface and the S1 interface. This cycle is repeated, so that the heat pump system can switch to the cooling mode while ensuring that the heat pump system is in countercurrent heat exchange.

[0070] It is not difficult to see that in the second embodiment of the present invention, by providing three valves, namely the first main valve 110, the second main valve 210 and the pilot valve 300, the heat pump system can be ensured to be in countercurrent heat exchange while realizing heating and cooling mode switching. The heat pump system can realize countercurrent heat exchange and mode switching of the heat pump system while reducing the number of valves, thereby helping to reduce the manufacturing cost of the heat pump system.

[0071] In the second embodiment of the present invention, the heat pump system further includes a throttling element 700, and the S2 interface is connected to the first end of the outdoor heat exchanger 600 through the throttling element 700. The throttling element 700 can be a thermal expansion valve, an electronic expansion valve or a capillary tube. The throttling element 700 is a common element in the heat pump system and will not be further described here.

[0072] As an embodiment of the present invention, the outdoor heat exchanger 600 is an air-cooled heat exchanger. The outdoor heat exchanger 600 can also be a shell-and-tube heat exchanger, a fin heat exchanger, a plate heat exchanger, etc., which will not be further described here.

[0073] In an embodiment of the present invention, the heat pump system is applied to a central floor heating and air conditioning system. The central floor heating and air conditioning system is a system integrating refrigeration, heating and domestic hot water supply, which will not be further described here.

[0074] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A heat pump system, characterized in that: include: A compressor (400), a water-fluorine heat exchanger (500) and an outdoor heat exchanger (600); The water-fluorine heat exchanger (500) comprises a water pipe (510) and a fluorine heat exchange pipe (520); the water pipe (510) is used for water flow; a loop for refrigerant flow is formed between the compressor (400), the fluorine heat exchange pipe (520) and the outdoor heat exchanger (600), so that the refrigerant in the fluorine heat exchange pipe (520) can exchange heat with the water in the water pipe (510); a first four-way valve (100), the first four-way valve (100) being arranged on the circuit, and the first four-way valve (100) being used to change the flow direction of the refrigerant so that the refrigerant flowing out of the exhaust end of the compressor (400) can flow through the fluorine heat exchange tube (520) and the outdoor heat exchanger (600) in sequence, or the refrigerant flowing out of the exhaust end of the compressor (400) can flow through the outdoor heat exchanger (600) and the fluorine heat exchange tube (520) in sequence; A flow control component is provided on the loop, and is used to keep the flow direction of the refrigerant in the fluorine heat exchange tube (520) opposite to the flow direction of the water in the water pipe (510).

2. The heat pump system according to claim 1, characterized in that: The first four-way valve (100) has a C1 interface, an S1 interface, an E1 interface and a D1 interface. The exhaust end of the compressor (400) is in communication with the D1 interface. The intake pipe of the compressor (400) is in communication with the S1 interface. The E1 interface is in communication with the fluorine heat exchange pipe (520). The C1 interface is in communication with the outdoor heat exchanger (600). The outdoor heat exchanger (600) is in communication with the fluorine heat exchange pipe (520). The D1 interface can be connected to the E1 interface. The interfaces are connected, the C1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor (400) first flows through the fluorine heat exchange tube (520) and then flows through the outdoor heat exchanger (600), the D1 interface can be connected to the C1 interface, and the E1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor (400) first flows through the outdoor heat exchanger (600) and then flows through the fluorine heat exchange tube (520).

3. The heat pump system according to claim 2, characterized in that: The flow direction control component is a second four-way valve (200), the C1 interface is connected to the two ends of the outdoor heat exchanger (600), and the second four-way valve (200) has a C2 interface, an S2 interface, an E2 interface and a D2 interface, the D2 interface is connected to the E1 interface, the S2 interface is connected to the first end of the outdoor heat exchanger (600), the E2 interface is connected to the second end of the fluorine heat exchange tube (520), the C2 interface is connected to the first end of the fluorine heat exchange tube (520), the D2 interface can be connected to the E2 interface, and the C2 interface can be connected to the S2 interface so that the refrigerant flows from the second end of the fluorine heat exchange tube (520) to the first end of the fluorine heat exchange tube (520), the D2 interface can be connected to the C2 interface, and the E2 interface can be connected to the S2 interface so that the refrigerant flows from the second end of the fluorine heat exchange tube (520) to the first end of the fluorine heat exchange tube (520).

4. The heat pump system according to claim 3, characterized in that: It also includes a throttling element (700), and the S2 interface is connected to the first end of the outdoor heat exchanger (600) through the throttling element (700).

5. The heat pump system according to claim 1, characterized in that: The first four-way valve (100) comprises a first main valve (110), the first main valve (110) having a C1 interface, an S1 interface, an E1 interface and a D1 interface, the exhaust end of the compressor (400) is in communication with the D1 interface, the intake pipe of the compressor (400) is in communication with the S1 interface, the E1 interface is in communication with the fluorine heat exchange pipe (520), the C1 interface is in communication with the outdoor heat exchanger (600), the outdoor heat exchanger (600) is in communication with the fluorine heat exchange pipe (520), and the The D1 interface can be connected to the E1 interface, and the C1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor (400) first flows through the fluorine heat exchange tube (520) and then flows through the outdoor heat exchanger (600). The D1 interface can be connected to the C1 interface, and the E1 interface can be connected to the S1 interface, so that the refrigerant flowing out of the exhaust end of the compressor (400) first flows through the outdoor heat exchanger (600) and then flows through the fluorine heat exchange tube (520).

6. The heat pump system according to claim 5, characterized in that: The first four-way valve (100) further comprises a pilot valve (300), an electromagnetic coil (310) and a first main valve (110); the electromagnetic coil (310) is arranged on the pilot valve (300); two ends of the first main valve (110) are respectively provided with a first port (111) and a second port (112); the pilot valve (300) has a C3 interface, an S3 interface, an E3 interface and a D3 interface; the D3 interface is communicated with the exhaust end of the compressor (400); the S3 interface is communicated with the intake end of the compressor (400); the E3 interface is communicated with the first port (111); and the second port (112) is communicated with the intake end of the compressor (400). 11), the C3 interface is connected to the second port (112), the electromagnetic coil (310) can be in a power-off state so that the D3 interface is connected to the E3 interface, the S3 interface is connected to the C3 interface, and the D1 interface is connected to the E1 interface, and the C1 interface is connected to the S1 interface, the electromagnetic coil (310) can be in a power-on state so that the D3 interface is connected to the C3 interface, the E3 interface is connected to the S3 interface, and the D1 interface is connected to the C1 interface, and the E1 interface is connected to the S1 interface.

7. The heat pump system according to claim 6, characterized in that: The flow direction control component is a second main valve (210), the C1 interface is in communication with the second end of the outdoor heat exchanger (600), the second main valve (210) has a C2 interface, an S2 interface, an E2 interface and a D2 interface, and two ends of the second main valve (210) are respectively provided with a third port (211) and a fourth port (212), the D2 interface is in communication with the E1 interface, the S2 interface is in communication with the first end of the outdoor heat exchanger (600), the E2 interface is in communication with the second end of the fluorine heat exchange tube (520), the C2 interface is in communication with the first end of the fluorine heat exchange tube (520), and the third port (211) is in communication with the first end of the fluorine heat exchange tube (520). The electromagnetic coil (310) is connected to the E3 interface, the fourth port (212) is connected to the C3 interface, the electromagnetic coil (310) can be in a power-off state, so that the D2 interface is connected to the E2 interface, the S2 interface is connected to the C2 interface, and the refrigerant flows from the second end of the fluorine heat exchange tube (520) to the first end of the fluorine heat exchange tube (520), and the electromagnetic coil (310) can be in a power-on state, so that the D2 interface is connected to the C2 interface, the E2 interface is connected to the S2 interface, and the refrigerant flows from the second end of the fluorine heat exchange tube (520) to the first end of the fluorine heat exchange tube (520).

8. The heat pump system according to claim 7, characterized in that: It also includes a throttling element (700), and the S2 interface is connected to the first end of the outdoor heat exchanger (600) through the throttling element (700).

9. The heat pump system according to claim 1, characterized in that: The outdoor heat exchanger (600) is an air-cooled heat exchanger.

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