Heat pump unit

Abstract

The utility model discloses a heat pump unit, which comprises a refrigerant loop, an indoor heat exchanger, an expansion valve and a plate heat exchanger, the water circulation loop flows through the plate heat exchanger to exchange heat with a refrigerant in the plate heat exchanger and is at least formed by connecting a pumping device and at least one indoor tail end; the safety device is arranged on the water outlet side of the plate heat exchanger, is configured to automatically exhaust or / and relieve pressure when the gas pressure in the water circulation loop reaches the set gas pressure or / and the water pressure reaches the set water pressure, and comprises a shell connected to the water circulation loop; the gas separating and exhausting unit is assembled on the shell and is used for separating water and gas entering the shell and exhausting the gas; and the pressure relief unit is assembled on the shell and is used for performing pressure relief on the water circulation loop. According to the heat pump unit, the exhaust and pressure relief functions can be achieved at the same time through the arranged safety device, and integrated arrangement and installation are more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump unit technical field, concretely relates to a heat pump unit structure with safety device. BACKGROUND

[0002] The existing heat pump unit is usually composed of a refrigerant circuit and a water system circuit, and the refrigerant circuit is connected by a compressor, a plate heat exchanger, an indoor heat exchanger, a four-way valve and a throttling device through a refrigerant pipeline to form.

[0003] The water circulation circuit of the water system is connected by a water pump, an expansion tank and indoor terminals through a water pipeline, and the water flow of the water system passes through the plate heat exchanger composed of the plate heat exchanger to exchange heat with the heat pump unit.

[0004] At the same time, in order to ensure the stable operation of the water system, an exhaust valve is arranged on the water circulation circuit to ensure the gas pressure in the system, and a pressure relief valve is arranged to relieve pressure, and the pressure relief and exhaust are realized by separate components. When assembling, the two parts need to be connected and assembled into the water circulation circuit respectively, which is inconvenient to operate, occupies a large space, and the exhaust is not complete and the exhaust effect is poor. UTILITY MODEL CONTENTS

[0005] In view of the above problems of the heat pump unit in the background art, a heat pump unit is provided, which can realize the functions of exhaust and pressure relief at the same time through the safety device, and the internal built-in gas separation exhaust unit can introduce the water flow in the water circulation circuit into the shell, separate the gas in the shell, and then exhaust after the gas is fully separated, thereby realizing efficient exhaust.

[0006] To achieve the above utility model purposes, the utility model adopts the following technical solutions:

[0007] In some embodiments of the present application, a heat pump unit is provided, which comprises:

[0008] A refrigerant circuit circulates refrigerant in a compressor, an indoor heat exchanger, an expansion valve and a plate heat exchanger;

[0009] A water circulation circuit passes through a plate heat exchanger to exchange heat with the refrigerant in the plate heat exchanger, and is formed by at least a pumping device and at least one indoor terminal;

[0010] A safety device is connected to the water circulation circuit and arranged on the water outlet side of the plate heat exchanger, and is configured to automatically exhaust or / and relieve pressure when the gas pressure in the water circulation circuit reaches a set gas pressure or / and the water pressure reaches a set water pressure, and comprises:

[0011] A shell is connected to the water circulation circuit;

[0012] A gas separation and exhaust unit is arranged on the shell for separating water from gas entering the shell and exhausting the gas;

[0013] A pressure relief unit is arranged on the shell for relieving the water circulation loop.

[0014] The above technical solution has the following advantages and effects:

[0015] When the refrigerant leaks, the refrigerant entering the water circulation loop from the plate heat exchanger will flow out from the plate heat exchanger side. The safety device is arranged between the plate heat exchanger side and the water supply end of the indoor terminal, which can ensure that the refrigerant is discharged through the safety device before it enters the indoor terminal, so as to avoid the leaked refrigerant entering the indoor terminal as much as possible.

[0016] The gas separation and exhaust unit and the pressure relief unit are arranged on the shell connected to the water circulation loop, which realizes the integrated arrangement of the exhaust component and the pressure relief component. The water flow can be exhausted and / or relieved as long as it flows through the safety device. The integrated setting method only needs to install the safety device at one position of the water circulation loop, without the need for installation at multiple positions, which is more convenient for installation, and the space occupied by the two components is smaller after integration.

[0017] In some embodiments of the present application, the safety device comprises:

[0018] A water inlet portion is formed on the shell for guiding the water flow in the water circulation loop into the interior of the shell;

[0019] A water outlet portion is formed on the shell for guiding the water flow in the interior of the shell to the water circulation loop, and a water flow channel is formed between the water outlet portion and the water inlet portion;

[0020] A first mounting portion is formed on the shell for mounting the gas separation and exhaust unit;

[0021] A second mounting portion is formed on the shell for mounting the pressure relief unit.

[0022] The above technical solution has the following advantages and effects:

[0023] The water inlet portion and the water outlet portion arranged on the shell can be used to ensure that the water flow in the water circulation loop flows into or out of the shell and communicates with the shell, so that the internal gas separation and exhaust unit and the pressure relief unit can adjust the gas pressure and water pressure in the water circulation loop.

[0024] The first mounting portion and the second mounting portion arranged on the shell can be used to mount the gas separation and exhaust unit and the pressure relief unit, and realize the integrated installation of the pressure relief and exhaust components.

[0025] In some embodiments of the present application, the shell comprises:

[0026] a side wall part constituting an outer surface of the shell;

[0027] a top wall part connected with the side wall part, for constituting a top surface of the shell;

[0028] wherein the water inlet part and the water outlet part are formed on the side wall part, and the water inlet part and the water outlet part are oppositely arranged;

[0029] the second mounting part is formed on the side wall part and is farther away from the top wall part than the water inlet part;

[0030] the first mounting part is formed at the position of the top wall part.

[0031] The above technical solution has the following advantages and effects:

[0032] The gas has small density and is in the upper region of the water pipe of the water circulation loop. The first mounting part for assembling the gas discharge device is arranged at the top wall part, so that the gas can be quickly and efficiently discharged. The second mounting part is arranged at the lower region of the shell, so that the water flow mainly drives the impurities to flow downward and be discharged, and the impurities are discharged more quickly.

[0033] In some embodiments of the present application, the gas separation and discharge unit comprises:

[0034] a bubble separation device assembled inside the shell and located on the water flow passage;

[0035] a gas discharge device assembled on the first mounting part, in communication with the internal space of the shell and corresponding to the position of the bubble separation device, for discharging the gas separated by the bubble separation device.

[0036] The above technical solution has the following advantages and effects:

[0037] The gas discharge device is assembled on the first mounting part to realize the connection with the shell, realizes integrated arrangement, is in communication with the internal space of the shell, can ensure that the water circulation loop in communication with the shell can be discharged when the gas discharge device acts, and is arranged at the position corresponding to the bubble separation device. The gas separated by the bubble separation device can be directly discharged by the gas discharge device. Through cooperation with the bubble separation device, the gas in the water circulation loop is not only efficiently separated, but also as much as possible is discharged, and the effect of efficient gas discharge is realized.

[0038] In some embodiments of the present application, the bubble separation device comprises at least one bubble separation piece, and the bubble separation piece comprises:

[0039] A plurality of annular partition strips are arranged in sequence along the height direction of the bubble separation device, and a discharge space is formed inside the plurality of annular partition strips;

[0040] A plurality of connecting partition strips are arranged in sequence along the circumferential direction of the annular partition strips, each connecting partition strip connects a plurality of annular partition strips along the height direction of the bubble separation device, and a plurality of water flow channels are formed between the plurality of connecting partition strips and the plurality of annular partition strips.

[0041] The above technical solution has the following advantages and effects:

[0042] The plurality of annular partition strips are separated by the connecting partition strips connected to the plurality of annular partition strips to form a plurality of narrow water flow channels, so that the water flow is blocked when flowing to the bubble separation device, the water flow speed is reduced, and the gas in the water flow can be fully separated from the water body.

[0043] In some embodiments of the present application, a plurality of protruding portions are formed on each connecting partition strip, and the plurality of protruding portions are arranged in sequence along the height direction of the connecting partition strip.

[0044] The above technical solution has the following advantages and effects:

[0045] When the water flow flows in, it first flows to the plurality of protruding portions outside the discharge space, the water flow rubs against the protruding portions when flowing through the protruding portions, the protruding portions provide resistance to the water flow and slow it down, and after flowing through the protruding portions, the water flow flows into the plurality of water flow channels, which are relatively narrow and also block the water flow. The cooperation of the protruding portions and the water flow channels slows down the water flow speed accordingly, prolongs the time of the water flow in the bubble separation device, and thus the gas in the water flow can be more fully separated.

[0046] In some embodiments of the present application, the indoor terminal has a water supply pipeline and a water return pipeline;

[0047] A water pressure detection component is arranged on the water outlet side of the plate heat exchanger to detect the water flow pressure on the water outlet side of the plate heat exchanger;

[0048] A control valve group is arranged on the water supply pipeline and the water return pipeline to connect or disconnect the indoor terminal and the water circulation loop, and includes:

[0049] A first control valve is arranged on the water supply pipeline of the indoor terminal to connect or disconnect the water supply pipeline of the indoor terminal;

[0050] A second control valve is arranged on the water return pipeline of the indoor terminal to connect or disconnect the water return pipeline of the indoor terminal.

[0051] The above technical scheme has the following advantages and effects:

[0052] The first control valve arranged on the water supply pipeline can control the on-off of the water supply pipeline of the indoor terminal, and the second control valve arranged on the return water pipeline can control the on-off of the return water pipeline of the indoor terminal. When the water pressure detection component detects that the plate heat exchanger outlet water side pressure is too large and the refrigerant leaks, the first control valve and the second control valve can be closed in cooperation, which can effectively avoid the water flow in the water supply pipeline or the return water pipeline and the indoor terminal, and further avoid the refrigerant from entering the indoor terminal with the water flow.

[0053] In some embodiments of the present application, the water circulation loop comprises:

[0054] The dirt removal device is connected between the pumping device and the return water pipeline of the indoor terminal, and is used for removing impurities in the water flow before entering the pumping device and the plate heat exchanger.

[0055] The dirt removal device comprises a dirt removal shell connected to the water circulation loop.

[0056] The dirt removal device further comprises a dirt removal component arranged in the dirt removal shell and used for removing impurities in the water flow flowing through the dirt removal shell.

[0057] The above technical scheme has the following advantages and effects: The dirt removal shell connected to the water circulation loop can connect the entire dirt removal device to the water circulation loop. When the water flow runs in the water circulation loop, the dirt removal component arranged in the dirt removal shell can remove the impurities in the water flow before entering the pumping device, so as to achieve the effect of removing impurities and avoid the water flow from blocking the pumping device and the plate heat exchanger.

[0058] In some embodiments of the present application, the water circulation loop comprises:

[0059] The backwashing pipeline is connected in parallel with the dirt removal device and the second control valve, and a backwashing control valve is arranged on the backwashing pipeline.

[0060] The above technical scheme has the following advantages and effects:

[0061] When the impurities in the water circulation loop reach a high accumulation degree, the impurities in the dirt removal device can be backwashed through the backwashing pipeline. When backwashing, the second control valve is closed and the backwashing control valve is opened.

[0062] At this time, the water flow from the indoor terminal return water end does not flow into the purifier through the second control valve, but flows into the purifier from the outlet through the backwashing pipeline after the backwashing control valve, thereby backwashing the purifier, and part of the water flow from the indoor terminal return water end flows out to the purifier for backwashing, and part of the water flow continues to flow into the plate heat exchanger for heat exchange. This mode can ensure the normal operation of the water system of the entire heat pump unit, and can realize backwashing of impurities in the purifier and efficient removal of impurities intercepted on the purifying component.

[0063] In some embodiments of the present application, the water circulation loop comprises a water supplement pipeline connected to the return water pipeline of the indoor terminal, and a water supplement control unit is arranged on the water supplement pipeline.

[0064] The above technical solution has the following advantages and effects:

[0065] After the drain of the purifying component is opened, the water flow in the water circulation loop is reduced and the water pressure is lowered. At this time, water supplement is needed through the water supplement pipeline, and the water supplement pipeline connected to the return water pipeline of the indoor terminal can quickly supplement water to the water circulation loop to ensure the normal operation of the water circulation loop.

[0066] Other features and advantages of the present application will become more apparent after reading the detailed implementation of the present application in combination with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0067] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0068] Figure 1 is a circulation schematic diagram of the heat pump unit according to the embodiment;

[0069] Figure 2 is a circulation structure diagram of the water circulation loop of the heat pump unit according to the embodiment;

[0070] Figure 3 is a structure schematic diagram of the safety device of the heat pump unit according to the embodiment;

[0071] Figure 4 is a structure exploded view of the safety device of the heat pump unit according to the embodiment;

[0072] Figure 5 is a three-dimensional structure of the bubble separation member of the heat pump unit according to the embodiment Figure 1 ;

[0073] Figure 6 Perspective view of a bubble separation piece for a heat pump unit according to an embodiment Figure 2 ;

[0074] Figure 7 Top view of a bubble separation piece for a heat pump unit according to an embodiment

[0075] Figure 8 Structural schematic view of a dirt removal device for a heat pump unit according to an embodiment

[0076] Figure 9 Structural schematic view of a dirt removal shell of a dirt removal device for a heat pump unit according to an embodiment

[0077] Figure 10 Structural schematic view of a dirt removal component for a heat pump unit according to an embodiment

[0078] Reference signs:

[0079] 100, refrigerant circuit; 110, compressor; 120, indoor heat exchanger; 140, plate heat exchanger; 200, water circulation circuit; 210, pumping device; 220, indoor terminal; 221, water supply pipeline; 222, return water pipeline; 300, safety device; 310, shell; 311, water inlet portion; 312, water outlet portion; 313, first mounting portion; 314, second mounting portion; 315, side wall portion; 316, top wall portion; 320, gas separation exhaust unit; 321, bubble separation piece; 3211, annular separation strip; 3212, connecting separation strip; 3213, water flow channel; 3214, discharge space; 3215, protruding portion; 322, exhaust device; 3221, exhaust valve interface portion; 330, pressure relief unit; 331, pressure relief interface portion; 410, water pressure detection component; 420, first control valve; 430, second control valve; 500, dirt removal device; 510, dirt removal shell; 511, dirt discharge portion; 512, inlet portion; 513, outlet portion; 514, dirt removal main body section; 515, support fixing portion; 516, guide section; 517, assembly section; 520, dirt removal component; 521, impurity discharge portion; 522, filter inlet portion; 523, filter passage; 530, dirt removal opening and closing piece; 540, valve cover; 610, back flushing pipeline; 611, back flushing control valve; 700, water replenishment pipeline; 710, water replenishment control unit; 720, water flow detection sensor. DETAILED DESCRIPTION

[0080] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0081] In some embodiments of the present application, referring to Figures 1-2 As shown in the figure, a heat pump unit is proposed, which is composed of a refrigerant circuit 100 and a water circulation circuit 200.

[0082] The refrigerant in the refrigerant circuit 100 circulates along each component in the refrigerant circuit 100 to perform refrigeration or heating.

[0083] Each component on the water circulation circuit 200 flows along the water circulation circuit 200.

[0084] In some embodiments of the present application, the refrigerant circuit 100 circulates the refrigerant in the compressor 110, the indoor heat exchanger 120, the expansion valve, and the plate heat exchanger 140.

[0085] Referring to Figure 1 As shown in the figure, the refrigerant cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0086] The low-temperature and low-pressure refrigerant enters the compressor 110, which compresses the refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0087] The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant formed in the condenser into low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 110.

[0088] The evaporator can achieve a refrigeration effect by exchanging heat with the material to be cooled using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of the indoor space.

[0089] The outdoor unit of the air conditioner includes the compressor 110 and the part of the outdoor heat exchanger, the indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0090] The indoor heat exchanger and the outdoor heat exchanger are used as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

[0091] The plate heat exchanger 140 in the embodiment is a plate heat exchanger 140 structure, which is used to connect the refrigerant circuit 100 and the water circulation circuit 200, and has refrigerant heat exchange pipelines and water flow heat exchange pipelines inside. The refrigerant heat exchange pipelines are connected to the refrigerant circuit 100, and the water flow heat exchange pipelines are connected to the water circulation circuit 200.

[0092] The refrigerant flowing into the refrigerant heat exchange pipelines from the refrigerant circuit 100 can exchange heat with the water flowing into the water flow heat exchange pipelines from the water circulation circuit 200 inside the plate heat exchanger 140, so as to change the temperature of the water flow flowing in the water circulation circuit 200.

[0093] In some embodiments of the present application, referring to Figures 1-2 As shown in the figure, the water circulation circuit 200 is formed by the pumping device 210 and at least one indoor terminal 220, wherein the indoor terminal 220 has a water supply end and a water return end.

[0094] The indoor terminal 220 is arranged in the indoor, and one or more indoor terminals 220 can be arranged to provide corresponding indoor heating or water supply services for users.

[0095] The water supply end of the indoor terminal 220 is used to guide the water exchanged with the refrigerant circuit 100 in the water circulation circuit 200 into the indoor terminal 220, and the water return end is used to guide the water exchanged by the indoor terminal 220 into the water circulation circuit 200.

[0096] In some embodiments of the present application, the pumping device 210 is a water pump connected to the water circulation circuit 200, which is used to drive the flow of the water flow, so that the water flow can flow between the plate heat exchanger 140 and each indoor terminal 220, and ensure that the water flow can flow through the plate heat exchanger 140 for heat exchange, and ensure that the water flow can be pumped to each indoor terminal 220 for normal operation.

[0097] When the whole heat pump unit is running, the compressor 110 is running, the refrigerant discharged from the compressor 110 flows into the outdoor plate heat exchanger 140, at the same time, the water flow in the water system also flows to the plate heat exchanger 140 under the driving of the pumping device 210, the water flow in the plate heat exchanger 140 exchanges heat with the refrigerant in the plate heat exchanger 140, the refrigerant releases heat, the water flow absorbs heat, the water flow in the water system is heated and continues to flow to the indoor terminal 220, and enters the indoor terminal 220 from the water supply end of the indoor terminal 220 for heat exchange.

[0098] After heat exchange in the indoor terminal 220, the return water flows out from the return water end of the indoor terminal 220, and finally enters the water supply side of the plate heat exchanger 140 outside, exchanges heat in the plate heat exchanger 140, and flows out from the return water side of the plate heat exchanger 140 and enters the indoor terminal 220, and the cycle is continuously performed, so that the heat of the refrigerant circuit 100 is continuously supplied to the indoor terminal 220.

[0099] In some embodiments of the present application, referring to Figures 1-2 As shown, the water circulation circuit 200 is connected with an expansion tank, which is connected to the water circulation circuit 200 through a branch pipe, and an expansion tank pressure regulating valve is arranged at the bottom of the expansion tank to control and regulate the pressure of the expansion tank, so as to regulate the internal pressure of the expansion tank.

[0100] The water in the water system will expand and contract with the change of temperature, and the expansion tank is used to store the excess water generated by thermal expansion, so as to ensure the stable operation of the water system.

[0101] In some embodiments of the present application, an electric heating device is connected to the water circulation circuit 200 and arranged on the water pipe between the water outlet side of the plate heat exchanger 140 and the water supply end of the indoor terminal 220, so as to assist in heating the water flow in the water system.

[0102] When the temperature of the water flow in the water system cannot meet the water temperature required by the indoor terminal 220, the electric heating device can be turned on to assist in heating the water flow, so as to meet the temperature requirement of the water flow.

[0103] The flowing medium in the water circulation circuit 200 is water flow, and the refrigerant flowing in the refrigerant circuit 100 is R290 refrigerant.

[0104] R290 refrigerant is a flammable and explosive substance. When the plate heat exchanger 140 and other water-fluorine heat exchange components in the heat pump unit are damaged, the R290 refrigerant flowing in the plate heat exchanger may leak into the water circulation circuit 200, and the water circulation circuit 200 enters the indoor terminal 220, which may cause indoor safety problems.

[0105] At the same time, the presence of oxygen in the system also causes problems such as corrosion, gas pocket accumulation in the heat dissipation terminal, and cavitation of the circulating pump.

[0106] To solve the above problems, in some embodiments of the present application, a heat pump unit is provided, and a safety integrated device is arranged on the water circulation circuit 200 of the heat pump unit, which is used to discharge the gas in the water circulation circuit 200 and also can discharge the pressure of the water circulation circuit 200, so as to avoid the leakage of the refrigerant into the indoor terminal 220 as much as possible.

[0107] In some embodiments of the present application, referring to Figures 1-2As shown, the safety device 300 is connected to the water circulation loop 200, arranged between the water supply end of the indoor terminal 220 and the plate heat exchanger 140, configured to automatically vent and / or relieve pressure when the gas pressure of the water system reaches the set gas pressure and / or the water pressure reaches the set water pressure.

[0108] The safety device 300 can be used to automatically vent and relieve pressure of the water circulation loop 200, and the integrated implementation realizes the functions of venting and relieving pressure.

[0109] When the water pressure in the water circulation loop 200 reaches the set water pressure, it can automatically open to relieve pressure, so that the water pressure in the water circulation loop 200 is at the set water pressure, ensuring stable operation of the unit.

[0110] When the gas pressure in the water circulation loop 200 reaches the set gas pressure, it can automatically open to vent the gas in the water circulation loop 200, so that the gas pressure in the entire water circulation loop 200 is kept below the set gas pressure.

[0111] When the refrigerant leaks, the refrigerant entering the water circulation loop 200 from the plate heat exchanger 140 will flow out from the plate heat exchanger 140 side. Arranging the safety device 300 between the plate heat exchanger 140 side and the water supply end of the indoor terminal 220 can ensure that the refrigerant is discharged through the safety device 300 before it enters the indoor terminal 220, so as to avoid the leaked refrigerant entering the indoor terminal 220 as much as possible.

[0112] In some embodiments of the present application, with reference to Figures 3-4 As shown, the safety device 300 includes a housing 310, a gas separation and venting unit 320 assembled on the housing 310, and a pressure relief unit 330 assembled on the housing 310.

[0113] The housing 310 is connected to the water circulation loop 200 and constitutes a part of the water circulation loop 200, and the gas pressure and water pressure inside are the same as those of the water circulation loop 200. The venting and relieving pressure through the pressure relief unit 330 and the gas separation and venting unit 320 can vent and relieve pressure of the water circulation loop 200.

[0114] The gas separation and venting unit 320 is mainly used for separating water and gas entering the housing 310 and discharging the gas. It separates water and gas first, and then discharges the gas. Through water and gas separation, the gas in the water flow can be efficiently separated, achieving the effect of efficient venting.

[0115] The pressure relief unit 330 is mainly used for relieving pressure of the water circulation loop 200 to realize the pressure relief function of the safety device 300.

[0116] The pressure relief unit 330 is an automatic pressure relief valve with a set water pressure value, which automatically opens to release pressure when the water pressure reaches the set water pressure value.

[0117] The air separation exhaust unit 320 and the pressure relief unit 330 are both assembled to the housing 310 connected to the water circulation loop 200, realizing integrated arrangement of the exhaust component and the pressure relief component, and water flow can be exhausted and / or relieved as long as it flows through the safety device 300. The integrated arrangement only needs to be installed at one position of the water circulation loop 200, without the need for installation at multiple positions, which is more convenient to install and occupies less space after integration of the two components.

[0118] In some embodiments of the present application, referring to Figures 3-4 The safety device 300 includes a water inlet portion 311 formed on the housing 310 for guiding water flow in the water circulation loop 200 into the interior of the housing 310.

[0119] The water inlet portion 311 is a water inlet opening on the housing 310 or a water inlet interface member assembled to the housing 310, which is in communication with the interior space of the housing 310 for allowing water flow to enter the interior of the housing 310.

[0120] In some embodiments of the present application, referring to Figures 3-4 The safety device 300 includes a water outlet portion 312 formed on the housing 310 for guiding water flow in the interior of the housing 310 to the water circulation loop 200, and a water flow channel is formed between the water outlet portion 312 and the water inlet portion 311.

[0121] The water outlet portion 312 is a water outlet opening on the housing 310 or a water outlet interface member assembled to the housing 310 for discharging water flow in the housing 310.

[0122] In some embodiments of the present application, referring to Figures 3-4 The safety device 300 includes a first mounting portion 313 formed on the housing 310.

[0123] The first mounting portion 313 is a first mounting opening or a first mounting member for mounting the air separation exhaust unit 320.

[0124] In some embodiments of the present application, the safety device 300 includes a second mounting portion 314 formed on the housing 310 for assembling the pressure relief unit 330.

[0125] The second mounting portion 314 is a second mounting opening on the housing 310 or a second mounting member connected to the housing 310, which is used to connect and fix the pressure relief unit 330 and the housing 310 together.

[0126] The above embodiments have the following advantages and effects:

[0127] The water inlet portion 311 and the water outlet portion 312 arranged on the shell 310 can be used to ensure that the water flow in or out of the shell 310 communicates with the water circulation loop 200, so that the internal gas separation and exhaust unit 320 and the pressure relief unit 330 can adjust the gas pressure and water pressure in the water circulation loop 200.

[0128] The first mounting portion 313 and the second mounting portion 314 arranged on the shell 310 can be used to mount the gas separation and exhaust unit 320 and the pressure relief unit 330, so as to realize integrated assembly of the pressure relief and exhaust components.

[0129] In some embodiments of the present application, referring to Figures 3-4 The gas separation and exhaust unit 320 includes a bubble separation device, which is assembled inside the shell 310 and located on the water flow passage.

[0130] The bubble separation device is arranged on the water flow passage between the water inlet portion 311 and the water outlet portion 312, so as to ensure that the water flow entering the shell 310 can flow through the bubble separation device and be separated by the bubble separation device.

[0131] The bubble separation device can be directly built into the internal space of the shell 310 when assembled, as long as its position in the shell 310 is between the water inlet portion 311 and the water outlet portion 312, so as to ensure its gas separation function.

[0132] In some embodiments of the present application, the bubble separation device can be fixed to the internal space of the shell 310 through buckles or fixing frames, so as to avoid shaking of the bubble separation device during use.

[0133] In some embodiments of the present application, referring to Figures 3-4 The gas separation and exhaust unit 320 includes an exhaust device 322, which is assembled on the first mounting portion 313, communicates with the internal space of the shell 310, and corresponds to the position of the bubble separation device, so as to exhaust the gas separated by the bubble separation device.

[0134] The above embodiments have the following advantages and effects:

[0135] The exhaust device 322 is assembled to the first mounting portion 313 to realize the connection with the shell 310, to realize the integrated arrangement which communicates with the internal space of the shell 310, and to ensure that the exhaust device 322 can realize the exhaust of the water circulation loop 200 when in operation, and the position is arranged to correspond to the bubble separation device, so that the gas separated by the bubble separation device can be directly discharged through the exhaust device 322. Through cooperation with the bubble separation device, not only the efficient separation of the gas in the water circulation loop 200 is realized, but also the gas in the water circulation loop 200 is discharged as much as possible, and the effect of efficient exhaust is realized.

[0136] In some embodiments of the present application, the exhaust device 322 adopts an existing automatic exhaust valve with a set pressure, which can automatically open the exhaust when the pressure reaches. The automatic exhaust valve is provided with an exhaust valve interface portion 3221 and an exhaust port. The exhaust valve interface portion 3221 is used to connect with the first mounting portion 313, and the exhaust port is used to exhaust and discharge pressure to the outside.

[0137] In some embodiments of the present application, the exhaust valve interface portion 3221 is threadedly connected with the first mounting portion 313. Through the threadedly connected cooperation, not only the connection between the exhaust device 322 and the shell 310 is realized, but also the sealing between the exhaust device 322 and the shell 310 is ensured, so that the water leakage does not occur in the use process, and the water flow pressure in the entire water circulation loop 200 is not affected.

[0138] In some embodiments of the present application, referring to FIG. 1, Figures 3-4 As shown in the figure, the shell 310 includes a side wall portion 315, a top wall portion 316, and a bottom wall portion.

[0139] The side wall portion 315 constitutes the outer surface of the shell 310, and is a cylindrical surface arranged along the circumference of the shell 310.

[0140] The top wall portion 316 is connected with the side wall portion 315, and is used to constitute the top surface of the shell 310. The top wall portion 316 is a circular surface which is matched with the cylindrical surface profile.

[0141] The water inlet portion 311 and the water outlet portion 312 are formed on the side wall portion 315, and are oppositely arranged.

[0142] The second mounting portion 314 is formed on the side wall portion 315 and is farther away from the top wall portion 316 than the water inlet portion 311, that is, the position of the second mounting portion 314 is farther away from the top wall portion 316 than the position of the water inlet portion 311, and the position is more downward. The position of the pressure relief component assembled above it is downward, and when the pressure relief, the water flow flows downward under the action of gravity and can quickly flow out along the pressure relief component for pressure relief.

[0143] The pressure relief unit 330 is obliquely connected to the shell 310, and a pressure relief interface part 331 is arranged on the pressure relief unit 330 and connected to the second mounting part 314 through the pressure relief interface part 331.

[0144] The pressure relief interface part 331 is threadedly connected to the second mounting part 314, and the threadedly connected fitting not only realizes the connection of the pressure relief unit 330 and the shell 310, but also guarantees the sealing between the pressure relief unit 330 and the shell 310, so that the water leakage does not occur in the use process and the water flow pressure in the entire water circulation loop 200 is affected.

[0145] The gas has small density, and the gas separated by the bubble separation device in the shell 310 rises and concentrates at the top area of the shell 310, and the water flow is at the bottom area. The first mounting part 313 is formed at the position of the top wall part 316, so that the automatic exhaust device arranged above is arranged at the top position of the shell 310, so that the gas concentrated at the top position is quickly exhausted from the exhaust device 322, and the effect of rapid exhaust is realized.

[0146] In some embodiments of the present application, referring to Figures 1-2 As shown in the figure, the water circulation loop 200 is provided with a water pressure detection part 410 and a control valve group.

[0147] The water pressure detection part 410 is a water pressure sensor arranged on the water outlet side of the plate heat exchanger 140, specifically between the safety device 300 and the water supply end of the indoor terminal 220, for detecting the pressure on the water outlet side of the plate heat exchanger 140.

[0148] The water pressure detection part 410 is arranged on the water outlet side of the plate heat exchanger 140, mainly for ensuring that it can timely detect the water outlet pressure of the plate heat exchanger 140 and ensure that the refrigerant leakage can be timely fed back.

[0149] In addition, the water flow in the water circulation loop 200 will have a higher pressure after heat exchange through the plate heat exchanger 140, and arranging the water pressure detection part 410 on the water outlet side of the plate heat exchanger 140 can ensure that the highest pressure in the water circulation loop 200 can be detected, so that the exhaust or pressure relief can be timely performed.

[0150] In some embodiments of the present application, the heat pump unit further comprises a control part for acquiring the water pressure value of the water pressure detection part 410 and controlling the action of the control valve group according to the detected value of the water pressure detection part 410.

[0151] The control valve group is arranged on the pipeline at the water return end and the water supply end of the indoor terminal 220, for on-off control of the water return end and the water supply end of the indoor terminal 220, so as to connect or disconnect the indoor terminal 220 and the water circulation loop 200.

[0152] The control valve group can be used to cut off or connect the indoor terminal 220 and the water circulation loop 200. When refrigerant leakage occurs, the control valve group can be controlled to be closed to close the water supply end of the indoor terminal 220 and the water return end of the indoor terminal 220, so that the water flow in the water circulation loop 200 does not flow in the indoor terminal 220, thereby avoiding the leakage of refrigerant into the indoor.

[0153] During the operation of the heat pump unit, if refrigerant leakage occurs to cause the system pressure to be too high, i.e., the water pressure and the gas pressure reach the set water pressure and the set gas pressure, the exhaust device 322 and the pressure relief device of the safety device 300 will automatically open to exhaust and relieve pressure.

[0154] At the same time, if refrigerant leakage occurs to cause the pressure to be too high, the control part can also detect that the pressure value of the pressure detection part is too large, which can control the control valve group to act to close the water inlet end and the water return end of the indoor terminal 220 to avoid the refrigerant from entering, and also close the pumping device 210 to avoid it from continuing to drive the water flow, so that the refrigerant leakage of the plate heat exchanger 140 to the indoor side can be more effectively avoided through the cooperation of the water pressure detection part 410, the control valve group and the safety device 300.

[0155] In some embodiments of the present application, the control valve group includes a first control valve 420 arranged on the water supply pipeline 221 of the indoor terminal 220, specifically arranged on the pipeline between the safety device 300 and the water supply end of the indoor terminal 220, for connecting or disconnecting the water supply pipeline 221 of the indoor terminal 220.

[0156] The first control valve 420 is a first electromagnetic valve, which can communicate with the control part and be automatically opened or closed by the controller of the control part.

[0157] The second control valve 430 is arranged on the water return pipeline 222 of the indoor terminal 220, specifically arranged on the pipeline between the water return end of the indoor terminal 220 and the plate heat exchanger 140, for connecting or disconnecting the water return pipeline 222 of the indoor terminal 220.

[0158] The second control valve 430 is a second electromagnetic valve, which can communicate with the control part and be automatically closed or opened by the controller of the control part.

[0159] The above embodiments have the following advantages and effects:

[0160] The first control valve 420 arranged on the water supply pipeline 221 can control the water supply pipeline 221 of the indoor terminal 220, and the second control valve 430 arranged on the return pipeline 222 can control the return pipeline 222 of the indoor terminal 220. When the refrigerant leaks, the first control valve 420 and the second control valve 430 are closed to effectively avoid the water flow in the water supply pipeline 221 or the return pipeline 222 and the indoor terminal 220, thereby avoiding the problem that the refrigerant enters the indoor terminal along with the water flow.

[0161] In some embodiments of the present application, referring to Figures 5-7 The bubble separation device includes a bubble separation piece 321, which includes:

[0162] A plurality of annular separation strips 3211 are arranged in sequence along the height direction of the bubble separation device, and a discharge space 3214 is formed inside the plurality of annular separation strips 3211.

[0163] A plurality of connecting separation strips 3212 are arranged in sequence along the circumferential direction of the annular separation strip 3211, and each connecting separation strip 3212 connects a plurality of annular separation strips 3211 along the height direction of the bubble separation device, and a plurality of water flow channels 3213 are formed between the plurality of connecting separation strips 3212 and the plurality of annular separation strips.

[0164] In some embodiments of the present application, a plurality of protruding portions 3215 are formed on each connecting separation strip 3212, and the plurality of protruding portions 3215 are located outside the discharge space 3214. Each connecting separation strip 3212 includes a plurality of protruding portions 3215, and the plurality of protruding portions 3215 are arranged in sequence along the height direction of the connecting separation strip 3212.

[0165] When the water flow enters, it first flows to the plurality of protruding portions 3215 outside the discharge space 3214. When the water flow flows through the protruding portions 3215, it is in contact with the protruding portions 3215 and is rubbed by the protruding portions 3215. The protruding portions 3215 provide resistance to the water flow and slow it down. After flowing through the protruding portions 3215, the water flow flows into the plurality of water flow channels 3213. The water flow channels 3213 are relatively narrow and also block the water flow. Through the cooperation of the protruding portions 3215 and the water flow channels 3213, the water flow speed is slowed down, the time of the water flow in the bubble separation device is prolonged, and the gas in the water flow can be more fully separated.

[0166] The separated gas in the water flow can be discharged outward along the discharge space 3214 at the middle position of the bubble separation device.

[0167] In some embodiments of the present application, the bubble separation piece 321 is provided in two or more groups, and the outer diameters of the annular partitions of the groups of bubble separation pieces 321 gradually increase.

[0168] During assembly, the groups of bubble separation pieces 321 are arranged in a nested manner according to the different outer diameters, i.e., the bubble separation pieces with smaller outer diameters are arranged inside, and the bubble separation pieces with larger outer diameters are arranged outside, so as to form a bubble separation device with a multi-layer structure.

[0169] The groups of protrusions 3215 on adjacent bubble separation pieces 321 are arranged in a staggered manner, and the groups of protrusions 3215 on any bubble separation piece 321 correspond to the water flow channels 3213 of another bubble separation piece 321.

[0170] The staggered arrangement can ensure that the water flow contacts the groups of protrusions 3215 and the water flow channels 3213 as much as possible, so as to prolong the time of the water flow in the bubble separation device as much as possible, and ensure the bubble separation effect.

[0171] In some embodiments of the present application, referring to FIG. 5, Figures 8-10 The decontamination device 500 includes a decontamination shell 510 connected to the water circulation loop 200, so as to realize the communication and docking between the decontamination device 500 and the water circulation loop 200, and ensure that the water flow in the water circulation loop 200 can flow through the inside of the decontamination shell 510.

[0172] In some embodiments of the present application, the decontamination device 500 includes a decontamination component 520 arranged in the decontamination shell 510, which is used for removing impurities flowing into the decontamination shell 510. The decontamination component 520 arranged in the decontamination shell 510 mainly plays a role of adsorbing and removing impurities.

[0173] In some embodiments of the present application, the decontamination device 500 includes a decontamination part 511 formed on the decontamination shell 510, which is used for discharging impurities at the decontamination component 520.

[0174] The decontamination part 511 is a decontamination port formed on the decontamination shell 510, which constitutes an impurity discharge port. The impurities adsorbed by the decontamination component 520 can be discharged from the decontamination shell through the decontamination port.

[0175] In some embodiments of the present application, the decontamination device 500 includes a decontamination opening and closing piece 530 assembled into the decontamination shell 510, which is used for opening or closing the decontamination part.

[0176] When the decontamination opening and closing piece 530 is in a closed state, the water flow enters the decontamination shell 510 and then flows to the decontamination component 520, so that the decontamination component 520 adsorbs and removes impurities. At this time, the water flow in the water circulation loop 200 continuously and stably operates, and the entire heat pump unit maintains a stable operating state.

[0177] When the dirt removal opening and closing member 530 is in the open state, the dirt removal part is correspondingly opened, at this time, the water flow entering the dirt removal shell 510 will flow through the dirt removal part 520, and at least part of the water flow will also flow through the dirt removal part 520 and then flow to the dirt removal part, thereby carrying away the impurities accumulated or adsorbed on the dirt removal part 520 and driving them to flow out of the dirt removal shell 510, realizing the automatic discharge function of the impurities.

[0178] By correspondingly opening the dirt removal opening and closing operation of the dirt removal part 511, the automatic discharge of the impurities accumulated in the dirt removal part 520 can be realized.

[0179] The heat pump unit in the above embodiments of the present application is provided with a dirt removal device 500 connected to the water circulation loop 200, so that the water flow can realize automatic adsorption and removal of impurities when flowing through the dirt removal part 520 in the dirt removal shell 510.

[0180] At the same time, the dirt removal part 511 and the dirt removal opening and closing member 530 are provided on the dirt removal shell 510, when the impurities accumulate more on the dirt removal part 520, the dirt removal part 511 can be opened by opening the dirt removal opening and closing member 530, so that the impurities adsorbed and accumulated on the dirt removal part 520 are automatically discharged from the dirt removal part 511, and the removal of impurities does not require manual disassembly and cleaning of the dirt removal device 500, which reduces the cost of manual maintenance, and also avoids the problem that manual disassembly is limited by the space and has a large operation difficulty.

[0181] In some embodiments of the present application, referring to Figures 8-10 As shown in the figure, the dirt removal device 500 of the heat pump unit includes an inlet part 512 formed on the dirt removal shell 510, for introducing the water flow of the water circulation loop 200 into the dirt removal shell 510.

[0182] The inlet part 512 is a water inlet formed on the dirt removal shell 510 or a water inlet interface member installed on the dirt removal shell 510, which is connected to the water circulation loop 200 for water inlet.

[0183] In some embodiments of the present application, the dirt removal device 500 includes an outlet part 513 formed on the dirt removal shell 510, for leading the water flow of the water circulation loop 200 out of the dirt removal shell 510, and an internal flow channel is formed between the inlet part 512, the outlet part 513 and the dirt removal shell 510, and the dirt removal part 520 is provided on the internal flow channel.

[0184] The outlet part 513 is a water outlet or a water outlet interface member installed on the dirt removal shell 510.

[0185] When the forming, the water inlet and the water outlet can also be formed by an inlet and outlet water interface once, installed to the decontamination shell 510 to form the water inlet part 311 and the water outlet part 312.

[0186] The inlet part 512, the outlet part 513 and the decontamination shell 510 form the internal flow, which is the water flow channel in the decontamination device 500. The decontamination part 520 is arranged on the internal flow channel, which can ensure that the water flow flowing into the decontamination shell 510 can pass through the decontamination part 520 for decontamination.

[0187] In some embodiments of the present application, referring to Figures 8-10 As shown, the decontamination part 520 is arranged in the decontamination shell 510, and an accommodation space is formed inside, and an impurity discharge part 521 is formed at the end thereof and communicates with the accommodation space, and the impurity discharge part corresponds to the pollution discharge part 511.

[0188] The impurities adsorbed by the decontamination part 520 are accumulated in the accommodation space inside the inner wall of the decontamination part 520, and the impurity discharge part 521 at the end thereof is an impurity discharge port and communicates with the internal accommodation space, which is used to ensure that the accumulated impurities on the decontamination part 520 can be discharged from the decontamination part 520.

[0189] The impurity discharge part 521 of the decontamination part 520 is arranged to correspond to the pollution discharge part 511, so that the impurities discharged from the impurity discharge part 521 can be discharged from the decontamination shell 510 along the pollution discharge part 511.

[0190] In some embodiments of the present application, referring to Figure 10 As shown, a filter inlet part 522 is formed on the decontamination part 520, and the filter inlet part 522 is in butt joint with the water inlet part 311.

[0191] The filter inlet part 522 is used to guide the water flow into the accommodation space, and the butt joint with the water inlet part 311 can ensure that all the water flow flowing out of the water inlet part 311 passes through the filter inlet part 522 and enters the internal accommodation space.

[0192] In some embodiments of the present application, a plurality of filter channels 523 are formed on the decontamination part 520, which are used to guide the water flow in the accommodation space to the outside, and each filter channel 523 penetrates the decontamination part 520 to the internal accommodation space.

[0193] The filter channel 523 penetrates to the accommodation space, which is mainly used for filtering the water flow entering the accommodation space. The impurities in the water flow can be accumulated on the inner wall of the decontamination part 520 and cannot be discharged, and finally continuously accumulated in the internal accommodation space.

[0194] In some embodiments of the present application, the filtering passage 523 is a filtering mesh hole formed on the dirt removal component 520, and the filtering mesh hole is arranged in plurality and uniformly covers the outer wall of the dirt removal component 520.

[0195] The water flow enters the containing space through the filtering inlet 522, and then the plurality of filtering mesh holes arranged around the dirt removal component 520 flow outwards into the space between the dirt removal shell 510 and the dirt removal component 520. The water flow passes through the filtering mesh hole, and the large impurities are accumulated inside the dirt removal component 520. The water flow between the dirt removal component 520 and the dirt removal shell 510 is discharged outwards through the water outlet 312 of the entire dirt removal shell 510.

[0196] If the dirt removal device 500 needs to discharge impurities at this time, the filtered water flow entering the space between the dirt removal component 520 and the dirt removal shell 510 will cause part of the water flow to flow downwards along the inner wall of the dirt removal component 520 through the impurity discharge part 521 to the discharge part 511 to drive the impurities to be discharged.

[0197] In some embodiments of the present application, the dirt removal component 520 is vertically arranged in the dirt removal shell 510 or is arranged at an angle relative to the vertical direction, and the discharge part 511 is arranged below the dirt removal component 520.

[0198] The vertical or inclined arrangement of the dirt removal component 520 relative to the vertical direction can cause the impurities accumulated on the inner wall of the dirt removal component 520 to be discharged to the discharge part 511 under the joint action of gravity and water flow when the discharge part 511 is opened, so that the impurities can be easily and quickly discharged, thereby improving the discharge efficiency of the impurities.

[0199] In some embodiments of the present application, the dirt removal component 520 is inclined at an angle of 5-10 degrees relative to the vertical direction, and a smaller inclination angle can also ensure that the impurities can fall by gravity.

[0200] In some embodiments of the present application, the dirt removal component 520 is formed with a mounting port at one end relative to the impurity discharge part 521, and a valve cover 540 is assembled at the mounting port. The valve cover 540 can be disassembled during use to take out the dirt removal component 520 from the mounting port for replacement or complete cleaning operation.

[0201] In some embodiments of the present application, the dirt removal shell 510 includes a dirt removal main section 514, and the dirt removal main section 514 is formed with a support and fixing part 515 for supporting and fixing the dirt removal component 520.

[0202] The support fixing part 515 is a support fixing groove formed on the main body section 514, which is annular, and the end of the dirt removal part 520 is formed with a plug-in table matched with the support fixing groove, and the dirt removal part 520 can be plugged into the support fixing groove through the plug-in table.

[0203] In some embodiments of the present application, the dirt removal shell 510 includes a dirt discharge section, which includes a guide section 516 connected to the main body section and an assembly section 517 connected to the guide section 516, and the dirt discharge part 511 is formed at the assembly section 517.

[0204] The above-mentioned embodiments have the following advantages and effects: the main body section 514 can be used to mainly contain the dirt removal part 520, and the support fixing part 515 above it can support and fix the dirt removal part 520;

[0205] The dirt discharge section is mainly used for discharging impurities, and the guide section 516 connected to the main body section can guide the impurities at the dirt removal part 520 to the dirt discharge part 511 on the assembly section 517, so that the impurities can be smoothly and quickly discharged from the dirt removal shell.

[0206] In some embodiments of the present application, a water flow detection sensor 720 is arranged on the water circulation loop 200, which is arranged between the indoor end 220 backwater end and the plate heat exchanger 140, and is used to detect the water flow pressure.

[0207] In some embodiments of the present application, the heat pump unit has a control part, which communicates with the water flow detection sensor 720 and can obtain the water flow value of the water flow detection sensor 720.

[0208] When in use, the water flow value of the water flow sensor can also be obtained by the control part to determine the impurity accumulation degree.

[0209] When the impurity accumulation amount is large, the water flow is blocked, and the water flow on the water circulation loop 200 must be reduced, so that when the heat pump unit is running, the value of the water flow detection sensor 720 can also be detected to control the opening or closing of the dirt removal opening and closing part 530.

[0210] When the dirt removal opening and closing part 530 is opened, the opening time of the dirt removal opening and closing part 530 can also be set according to the size of the water flow value of the water flow detection sensor 720, such as when the water flow value is small, which represents that the impurity accumulation is large, the dirt removal opening and closing part 530 can be opened for a long time to ensure that the impurities are completely discharged.

[0211] When the water flow value is large, it represents that the impurity accumulation is small, and the dirt removal opening and closing part 530 can be opened for a short time to ensure the stable operation of the entire heat pump unit.

[0212] In some embodiments of the present application, the dirt removal on-off piece 530 is a dirt removal electric valve, which can realize the function of automatic opening and closing. In use, the automatic opening can be set in the control part after a preset time, so as to achieve the effect of automatic periodic removal of impurities.

[0213] In some embodiments of the present application, the dirt removal component 520 is electrified to have magnetism, i.e., the dirt removal component 520 is an electromagnetic dirt removal piece, which is mainly used for adsorbing and removing metal impurities in the water system.

[0214] The dirt removal component 520 has a first state and a second state. When it is in the first state, it adsorbs impurities flowing therethrough. When it is in the second state, it is separated from the impurities adsorbed thereby.

[0215] The first state corresponds to the electrified state of the dirt removal component 520. The electromagnetic dirt removal piece has magnetism when it is electrified, and can generate a magnetic field. The generated magnetic field can be used for adsorbing and removing metal impurities in the water flow, so as to realize automatic adsorption and removal of impurities in the water flow.

[0216] The second state corresponds to the de-energized state of the dirt removal component 520. The electromagnetic dirt removal piece loses magnetism when it is de-energized. Therefore, the metal impurities adsorbed thereon are automatically separated therefrom, so as to realize the effect of automatic separation of metal impurities and the dirt removal component 520.

[0217] The separated metal impurities can be automatically discharged outward through the dirt discharge part 511.

[0218] In some embodiments of the present application, the water circulation loop 200 comprises a backwashing pipeline 610 connected in parallel with the dirt removal device 500 and the second control valve 430. A backwashing control valve 611 is arranged on the backwashing pipeline.

[0219] Specifically, one end of the backwashing pipeline 610 is connected to the water outlet end of the dirt removal device 500, and the other end is connected to the pipeline between the second control valve 430 and the water return end of the indoor terminal 220.

[0220] When the impurities in the water circulation loop 200 reach a high accumulation degree, the impurities in the dirt removal device 500 can be backwashed through the backwashing pipeline. When backwashing, the second control valve 430 is closed and the backwashing control valve 611 is opened.

[0221] At this time, the water flow from the water return end of the indoor terminal 220 does not flow into the purifier 500 through the second control valve 430, but flows into the purifier 500 from the outlet through the backwashing control valve 611 of the backwashing pipeline, thereby backwashing the purifier 500, and part of the water flow from the water return end of the indoor terminal 220 flows out of the purifier 500 for backwashing, and part of the water flow continues to flow into the plate heat exchanger 140 for heat exchange. In this way, the normal operation of the water system of the entire heat pump unit can be ensured, and the reverse cleaning of impurities in the purifier 500 can be realized, and the effect of efficiently removing impurities intercepted on the purifying component 520 can be realized.

[0222] In some embodiments of the present application, with reference to Figures 1-2 As shown in the figure, the water circulation loop 200 comprises a water supplement pipeline 700 connected to the water return pipeline 222 of the indoor terminal 220, and the water supplement pipeline 700 is mainly used for water supplement.

[0223] After the drain opening 511 of the purifying component 520 is opened, the water flow in the water circulation loop 200 is reduced, and the water pressure is reduced. At this time, water supplement needs to be performed through the water supplement pipeline 700.

[0224] In some embodiments of the present application, the water supplement pipeline 700 is provided with a water supplement control unit 710, and the water supplement control unit 710 comprises a water supplement flow detection element and a water supplement on-off valve.

[0225] The water supplement on-off valve can control the opening and closing of the water supplement pipeline 700, so as to determine whether to open the water supplement function.

[0226] The water supplement flow detection element can control and detect the water supplement flow of the water supplement pipeline 700.

[0227] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0228] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A heat pump unit, characterized by The heat pump unit comprises: a refrigerant circuit, which circulates refrigerant in a compressor, an indoor heat exchanger, an expansion valve, and a plate heat exchanger; a water circulation circuit, which flows through the plate heat exchanger to exchange heat with refrigerant in the plate heat exchanger, and is formed by at least a pumping device and at least one indoor terminal; a safety device, which is arranged on a water outlet side of the plate heat exchanger and is configured to automatically discharge gas and / or release pressure when gas pressure in the water circulation circuit reaches a set gas pressure and / or water pressure reaches a set water pressure, and comprises: a housing, which is connected to the water circulation circuit; a gas separation and discharge unit, which is mounted on the housing and is used to separate gas from water entering the housing and discharge the gas; a pressure release unit, which is mounted on the housing and is used to release pressure of the water circulation circuit.

2. The heat pump unit of claim 1, wherein, The safety device comprises: a water inlet portion, which is formed on the housing and is used to guide water flow in the water circulation circuit into the housing; a water outlet portion, which is formed on the housing and is used to guide water flow in the housing to the water circulation circuit, and a water flow channel is formed between the water outlet portion and the water inlet portion; a first mounting portion, which is formed on the housing and is used to mount the gas separation and discharge unit; a second mounting portion, which is formed on the housing and is used to mount the pressure release unit.

3. The heat pump unit according to claim 2, wherein the housing comprises: a side wall portion, which constitutes an outer surface of the housing; a top wall portion, which is connected to the side wall portion and is used to constitute a top surface of the housing; wherein the water inlet portion and the water outlet portion are formed on the side wall portion and are oppositely arranged; the second mounting portion is formed on the side wall portion and is farther away from the top wall portion than the water inlet portion; the first mounting portion is formed at a position of the top wall portion.

4. The heat pump unit of claim 2, wherein, The gas separation and discharge unit comprises: a bubble separation device, which is mounted in the housing and is located on the water flow channel; a gas discharge device, which is mounted on the first mounting portion, is in communication with a space in the housing, and is located corresponding to the bubble separation device, and is used to discharge gas separated by the bubble separation device.

5. The heat pump unit of claim 4, wherein, The bubble separation device comprises at least one bubble separation piece, and the bubble separation piece comprises: a plurality of annular separation strips, which are arranged along a height direction of the bubble separation device, and a discharge space is formed in the plurality of annular separation strips; a plurality of connecting separation strips, which are arranged along a circumferential direction of the annular separation strips, and each connecting separation strip connects a plurality of annular separation strips along the height direction of the bubble separation device, and a plurality of water flow channels are formed between the plurality of connecting separation strips and the plurality of annular separation strips.

6. The heat pump unit of claim 5, wherein, A group of protrusions is formed on each connecting separation strip, and the group of protrusions is located outside the discharge space, and each group of protrusions on each connecting separation strip comprises a plurality of protrusions, and the plurality of protrusions are arranged along the height direction of the connecting separation strip.

7. The heat pump unit according to claim 1, wherein the indoor terminal has a water supply pipeline and a water return pipeline connected to the water circulation circuit; a water pressure detection component, which is arranged on a water outlet side of the plate heat exchanger and is used to detect water flow pressure on the water outlet side of the plate heat exchanger; a control valve group, which is arranged on the water supply pipeline and the water return pipeline and is used to connect or disconnect the indoor terminal and the water circulation circuit, and comprises: A first control valve is arranged on the water supply line of the indoor terminal for connecting or disconnecting the water supply line of the indoor terminal. A second control valve is arranged on the water return line of the indoor terminal for connecting or disconnecting the water return line of the indoor terminal.

8. The heat pump unit of claim 7, wherein, The water circulation loop comprises: A dirt removal device is connected between the pumping device and the water return line of the indoor terminal for removing impurities from the water flow before the water flow enters the plate heat exchanger. The water circulation loop comprises: The water circulation loop comprises:

9. The heat pump unit of claim 8, wherein, The water circulation loop comprises: The water circulation loop comprises:

10. The heat pump unit of claim 6, wherein, The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises: The water circulation loop comprises:

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