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 dirt removing device is connected to the water circulation loop and comprises a dirt removing shell connected to the water circulation loop, and the dirt removing shell is provided with an inlet part, an outlet part and a dirt discharging part; a pollution discharge flow channel is formed between the inlet part and the pollution discharge part, and the pollution discharge component is arranged in the pollution discharge shell and on the pollution discharge flow channel; the dirt discharging part is formed on the dirt removing shell and is used for discharging impurities at the dirt removing part; and the dirt removing opening and closing piece is assembled in the dirt removing shell and used for opening or closing the dirt removing part. The heat pump unit provided by the utility model can be automatically started to discharge impurities and pollution.

Description

TECHNICAL FIELD

[0001] The utility model relates to an improvement of heat pump unit structure. 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] When the water in the water circulation circuit flows, it flows through each indoor terminal, and the water flow in the water circulation circuit may contain some impurities due to regional water quality difference or rusting of some terminals after long-term use, which may cause the pump to jam, the plate heat exchanger to be blocked, and the heat exchange efficiency to be reduced due to the blockage of the plate heat exchanger, resulting in poor system stability.

[0005] To solve the above problems, the existing operation mainly sets a conventional water filter screen on the water circulation circuit to adsorb and filter impurities. However, the filter screen needs to be manually disassembled to remove the internal filter screen and then pour out the impurities after a period of filtration, so as to process the long-term accumulated impurities. When the water quality in the water circulation circuit is poor, the filter screen needs to be frequently disassembled for impurity cleaning, which greatly increases the maintenance cost. INVENTION CONTENTS

[0006] In view of the above technical problems in the background art, a heat pump unit is provided, which can automatically open the impurity discharge and avoid the above problems.

[0007] In some embodiments of the present application, an air source 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 flows through the 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 decontamination shell has:

[0011] An inlet portion for introducing the water flow of the water circulation circuit into the decontamination shell;

[0012] An outlet part is formed on the purifying shell and used to guide the water flow of the water circulation loop out of the purifying shell.

[0013] A blowdown part is formed on the purifying shell and used to blow down the impurities at the purifying part, and a blowdown flow channel is formed between the inlet part and the blowdown part.

[0014] A purifying part is arranged on the blowdown flow channel and used to remove the impurities flowing into the purifying shell.

[0015] A purifying on-off part is arranged in the purifying shell and used to open or close the purifying part.

[0016] The above technical solution has the following advantages and effects:

[0017] The heat pump unit is provided with the purifying device connected to the water circulation loop, so that the water flow can automatically adsorb and remove the impurities when flowing through the purifying part in the purifying shell.

[0018] Meanwhile, the purifying shell is provided with the blowdown part and the purifying on-off part, and the blowdown flow channel is formed between the blowdown part and the inlet part. When the impurities are accumulated on the purifying part, the purifying on-off part can be opened to open the blowdown part, the water flow enters the blowdown flow channel from the inlet part, and the impurities on the purifying part are impacted to be automatically blown out of the blowdown part, without manual disassembly and cleaning of the purifying device, thereby reducing the manual maintenance cost and avoiding the problem of difficult operation due to the limited space.

[0019] In some embodiments of the present application, the purifying device comprises:

[0020] An internal flow channel is formed between the outlet part, the inlet part and the purifying shell, and the purifying part is arranged on the internal flow channel.

[0021] The above technical solution has the following advantages and effects:

[0022] The internal flow channel formed by the outlet part, the inlet part and the purifying shell is a water flow channel inside the purifying device, and the purifying part arranged on the internal flow channel can ensure that the water flow flowing into the purifying shell can pass through the purifying part for purification.

[0023] In some embodiments of the present application, an accommodation space is formed in the purifying part, an impurity blowdown part in communication with the accommodation space is formed at the end of the purifying part, the impurity blowdown part corresponds to the position of the blowdown part, and the purifying part is provided with:

[0024] A filter inlet part is arranged in abutment with the inlet part.

[0025] The filter passage is arranged in plurality, each of which penetrates the purifying component to the containing space.

[0026] The above technical solution has the following advantages and effects:

[0027] By the interface of the filter inlet on the purifying component and the inlet, the water flow in the water system circulation loop can be introduced into the purifying component, and then filtered through the plurality of filter passages, so that the water flows out of the filter passage, and the impurities are accumulated on the inner wall of the purifying component in the containing space. When the drain is opened, the water flow can drive the impurities to be discharged outward from the impurity discharge part. The cooperation of the filter inlet, the filter passage and the impurity discharge part on the purifying component realizes the functions of water flow introduction, filtration and impurity discharge.

[0028] In some embodiments of the present application, the purifying component is vertically arranged in the purifying shell or is arranged at an angle relative to the vertical direction, and the drain is arranged below the purifying component.

[0029] The above technical solution has the following advantages and effects:

[0030] The vertical or inclined purifying component can make the impurities accumulated on the inner wall of the purifying component be discharged to the drain under the joint action of gravity and water flow when the drain is opened, so that the impurities can be discharged more quickly, improving the discharge efficiency of the impurities.

[0031] In some embodiments of the present application, the purifying component is magnetized when powered, and has a first state and a second state.

[0032] When the purifying component is in the first state, it adsorbs the impurities flowing therethrough.

[0033] When the purifying component is in the second state, it is separated from the impurities adsorbed thereon.

[0034] The above technical solution has the following advantages and effects:

[0035] The purifying component with magnetism can generate a magnetic field when in the first state, and the generated magnetic field can be used to adsorb and remove the metal impurities in the water flow, realizing automatic adsorption and removal of the impurities in the water flow.

[0036] The second state corresponds to the power-off state of the purifying component, and the magnetic property disappears when powered off, realizing the automatic separation effect of the metal impurities adsorbed above and the purifying component.

[0037] By setting the purifying component as an electromagnetic purifying component, the automatic adsorption and automatic separation of the impurities are realized.

[0038] In some embodiments of the present application, the dirt removal shell is provided with an opening part;

[0039] A cover body is assembled on the shell and blocks the opening part;

[0040] The dirt removal component is assembled on the cover body and extends downward from the cover body to a position close to the dirt discharge part in the shell.

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

[0042] By assembling the dirt removal component on the cover body and detachably connecting the cover body to the opening part, the dirt removal component can be disassembled and assembled by detaching and assembling the cover body relative to the dirt removal shell, which facilitates the disassembly and assembly of the dirt removal component.

[0043] Meanwhile, the cover body assembled at the opening part of the dirt removal shell also supports the dirt removal component, so that the dirt removal component can be stably positioned in the dirt removal shell for impurity removal and adsorption.

[0044] In some embodiments of the present application, the water circulation circuit comprises:

[0045] The first control valve is arranged on the water supply pipeline of the indoor terminal and is used to connect or disconnect the water supply pipeline of the indoor terminal;

[0046] The second control valve is arranged on the water return pipeline of the indoor terminal and is used to connect or disconnect the water return pipeline of the indoor terminal.

[0047] The above technical solution has the following advantages and effects:

[0048] The first control valve arranged on the water supply pipeline can control the water supply pipeline of the indoor terminal, and the second control valve arranged on the water return pipeline can control the water return pipeline of the indoor terminal. When the pressure of the water outlet side of the plate heat exchanger is too large and the refrigerant leaks, the first control valve and the second control valve can be closed to effectively avoid the water flow in the water supply pipeline or the water return pipeline and the flow in the indoor terminal, thereby avoiding the refrigerant from entering the indoor terminal with the water flow.

[0049] In some embodiments of the present application, the water circulation circuit comprises:

[0050] The backflushing pipeline is connected in parallel with the dirt removal device and the second control valve, and a backflushing control valve is arranged on the backflushing pipeline.

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

[0052] 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.

[0053] At this time, the water flow from the indoor terminal return water end does not flow into the dirt removal device through the second control valve, but flows into the dirt removal device from the outlet through the backwashing control valve after flowing through the backwashing pipeline, thereby backwashing the dirt removal device. Part of the water flow from the indoor terminal return water end flows out to the dirt removal device for backwashing, and part continues to flow into the plate heat exchanger for heat exchange. This method can ensure the normal operation of the water system of the entire heat pump unit, and can realize backwashing of the impurities in the dirt removal device and efficient removal of the impurities intercepted on the dirt removal component.

[0054] In some embodiments of the present application, the water circulation loop includes a water supplement pipeline connected to the return water pipeline of the indoor terminal. A water supplement control unit is arranged on the water supplement pipeline.

[0055] The above technical solution has the following advantages and effects:

[0056] After the drain opening of the dirt removal 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. 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.

[0057] In some embodiments of the present application, the following are included:

[0058] The integrated safety device is connected to the water circulation loop and arranged on the water outlet side of the plate heat exchanger, and includes:

[0059] The housing is connected to the water circulation loop;

[0060] The gas separation and exhaust unit is assembled on the housing and is used for separating water from gas entering the housing and exhausting the gas;

[0061] The pressure relief unit is assembled on the housing and is used for relieving the pressure of the water circulation loop.

[0062] The above technical solution has the following advantages and effects:

[0063] The integrated safety device is connected to the water circuit between the water supply end of the indoor terminal and the plate heat exchanger, and automatically discharges gas and / or releases pressure when the gas pressure of the water system reaches the set gas pressure and / or the water pressure reaches the set water pressure; 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, and the integrated 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 integrated safety device before entering the indoor terminal, so as to avoid the leaked refrigerant entering the indoor terminal as much as possible.

[0064] In addition, the gas separation and discharge unit is mainly used for separating water from gas entering the shell and discharging the gas. The water and gas are separated first, and then the gas is discharged. Through water-gas separation, the gas in the water flow can be efficiently separated, and the effect of efficient gas discharge is realized.

[0065] Other features and advantages of the present application will become more apparent after reading the detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and other accompanying drawings can also be obtained by those skilled in the art without creative labor.

[0067] Figure 1 is a circulation principle diagram of the heat pump unit according to the embodiment;

[0068] Figure 2 is a circulation structure diagram of the water circulation loop of the heat pump unit according to the embodiment;

[0069] Figure 3 is a structure schematic diagram of the decontamination device of the heat pump unit according to the embodiment;

[0070] Figure 4 is a structure schematic diagram of the decontamination shell of the decontamination device of the heat pump unit according to the embodiment;

[0071] Figure 5 is a structure schematic diagram of the decontamination component of the heat pump unit according to the embodiment;

[0072] Figure 6 is a structure schematic diagram of the safety device of the heat pump unit according to the embodiment;

[0073] Figure 7 is an exploded view of the safety device of the heat pump unit according to the embodiment;

[0074] Figure 8 Perspective view of a bubble separation piece for a heat pump unit according to an embodiment Figure 1 ;

[0075] Figure 9 Perspective view of a bubble separation piece for a heat pump unit according to an embodiment Figure 2 ;

[0076] Figure 10 Top view of a bubble separation piece for a heat pump unit according to an embodiment.

[0077] Reference signs:

[0078] 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, water return 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 channel; 530, dirt removal opening and closing piece; 540, valve cover; 610, backflushing pipeline; 611, backflushing control valve; 700, water replenishment pipeline; 710, water replenishment control unit; 720, water flow detection sensor. DETAILED DESCRIPTION

[0079] 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 skilled in the art without creative work fall within the scope of protection of the present application.

[0080] In some embodiments of the present application, referring to Figures 1-2 It is shown that a heat pump unit is proposed, which is composed of a refrigerant circuit 100 and a water circulation circuit 200.

[0081] The refrigerant in the refrigerant circuit 100 circulates along each component in the refrigerant circuit 100 to perform refrigeration or heating.

[0082] Each component on the water circulation circuit 200 flows along the water circulation circuit 200.

[0083] 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.

[0084] The refrigerant cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat the indoor space.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] The outdoor unit of the air conditioner includes the compressor 110 and the portion 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.

[0089] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0090] The plate heat exchanger 140 in the present embodiment is a plate heat exchanger 140 structure for connecting the refrigerant circuit 100 and the water circulation circuit 200, and has refrigerant heat exchange pipes connected to the refrigerant circuit 100 and water flow heat exchange pipes connected to the water circulation circuit 200 inside the plate heat exchanger 140.

[0091] The refrigerant flowing into the refrigerant heat exchange pipe from the refrigerant circuit 100 can exchange heat with the water flowing into the water heat exchange pipe from the water circulation circuit 200 inside the plate heat exchanger 140, thereby changing the temperature of the water flowing in the water circulation circuit 200.

[0092] In some embodiments of the present application, the water circulation loop 200 is formed by connecting a 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.

[0093] The indoor terminal 220 is arranged indoors, and one or more indoor terminals may be provided to provide users with corresponding indoor heating or water supply services.

[0094] The water supply end of the indoor terminal 220 is used to introduce the water in the water circulation loop 200 that has exchanged heat with the refrigerant circuit 100 into the indoor terminal 220, and the return water end is used to lead the water after heat exchange in the indoor terminal 220 out to the water circulation loop 200.

[0095] In some embodiments of the present application, the pumping device 210 is a water pump, which is connected to the water circulation loop 200 to drive the flow of water so that the water can circulate between the plate heat exchanger 140 and each indoor terminal 220, ensuring that the water can flow through the plate heat exchanger 140 for heat exchange, and ensuring that the water can be pumped to the position of each indoor terminal 220 for normal operation.

[0096] When the entire heat pump unit is running, the compressor 110 runs, and the refrigerant discharged from the compressor 110 flows into the outdoor plate heat exchanger 140. At the same time, the water in the water system also flows into the plate heat exchanger 140 under the drive of the pumping device 210, and flows into the water in the plate heat exchanger 140 to exchange heat with the refrigerant in the plate heat exchanger 140. The refrigerant releases heat and the water absorbs heat. After the water in the water system is heated, it continues to flow to the indoor terminal 220, enters the indoor terminal 220 from the water supply end of the indoor terminal 220 for heat exchange, and flows out from the return water end of the indoor terminal 220 after heat exchange in the indoor terminal 220, and finally enters from the water supply side of the outdoor plate heat exchanger 140, enters the plate heat exchanger 140 for heat exchange, flows out from the return water side of the plate heat exchanger 140, and enters the indoor terminal 220, and circulates continuously in sequence. By utilizing the heat of the refrigerant circuit 100, it is continuously transported to the indoor terminal 220 for use.

[0097] In some embodiments of the present application, reference is made to Figures 1-2 As shown, the water circulation loop 200 is connected to an expansion water tank, which is connected to the water circulation loop 200 through a branch pipe. An expansion water tank pressure regulating valve is provided at the bottom of the expansion water tank to control and regulate its pressure, and is used to regulate the internal pressure of the expansion water tank.

[0098] Water in the water system will expand and contract with temperature changes, and the function of the expansion tank is to store the excess water produced by thermal expansion, to ensure the stable operation of the water system.

[0099] In some embodiments of the present application, an electric heating device is connected to the water circulation loop 200 and arranged on the water pipe between the outlet side of the plate heat exchanger 140 and the water supply end of the indoor terminal 220, for auxiliary heating of the water flow in the water system.

[0100] When the water flow temperature in the water system does not meet the water temperature requirement of the indoor terminal 220, the electric heating device can be turned on to assist in heating the water flow to meet the temperature requirement.

[0101] The flowing medium in the water circulation loop 200 is water flow, and the refrigerant flowing in the refrigerant circulation loop 200 is R290 refrigerant.

[0102] The water in the water circulation loop 200 flows through each indoor terminal 220, and the water flow in the water circulation loop 200 may contain impurities due to regional water quality differences or rusting of some terminals after long-term use. The presence of a large amount of impurities in the water circulation loop 200 can cause the pump 210 to jam, the plate heat exchanger 140 to be blocked, and the heat exchange efficiency to be reduced due to the blockage of the plate heat exchanger 140, resulting in poor system stability.

[0103] To solve the above problems, the existing operation mainly uses a conventional water filter screen to adsorb and filter impurities. However, the filter screen needs to be manually disassembled to remove the internal filter screen and then pour out the impurities after a period of filtration, to treat the long-term accumulated impurities. When the water quality in the water circulation loop 200 is poor, the filter screen needs to be frequently disassembled and cleaned by hand, which significantly increases the maintenance cost.

[0104] In addition, with the consideration of product performance, reliability, and aesthetics of heat pump water system equipment, the filter screen is mostly assembled inside the heat pump unit, and the space structure is limited, making manual operation difficult and increasing the difficulty of operation.

[0105] In some embodiments of the present application, a pollution removal device 500 is arranged on the water circulation loop 200, which can automatically discharge the accumulated impurities inside without manual disassembly and cleaning, avoiding the problems of high maintenance cost and difficult operation caused by frequent manual disassembly and assembly.

[0106] In some embodiments of the present application, with reference to Figures 1-2As shown, the dirt removal device 500 is connected to the water circulation loop 200, arranged between the water return end of the indoor terminal 220 and the pumping device 210, for removing impurities from the water flow before the water flow enters the pumping device 210 and the plate heat exchanger 140.

[0107] When the heat pump unit is running, the water flow in the water circulation loop 200 enters the indoor terminal 220 from the water supply end of the indoor terminal 220, flows out of the indoor terminal 220 after heat exchange in the indoor terminal 220, and then enters the pumping device 210 arranged near the plate heat exchanger 140. If there are impurities in the water flow, the pumping device 210 and the plate heat exchanger 140 behind it will be blocked when the water flow enters the pumping device 210 from the indoor terminal 220.

[0108] Arranging the dirt removal device 500 between the pumping device 210 and the water return end of the indoor terminal 220 can ensure that the water flow is removed by the dirt removal device 500 before flowing out of the indoor terminal 220 and entering the pumping device 210, avoiding impurities entering the pumping device 210 and the plate heat exchanger 140.

[0109] In an embodiment of the present application, referring to Figures 3-5 As shown, the dirt removal device 500 includes a dirt removal shell 510 connected to the water circulation loop 200, for realizing the communication and docking between the dirt removal device 500 and the water circulation loop 200, to ensure that the water flow in the water circulation loop 200 can flow through the inside of the dirt removal shell 510.

[0110] In some embodiments of the present application, referring to Figures 3-5 As shown, the dirt removal device 500 of the heat pump unit includes an inlet portion 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.

[0111] The inlet portion 512 is a water inlet formed on the dirt removal shell 510 or a water inlet interface installed on the dirt removal shell 510, which is connected to the water circulation loop 200 for water inlet.

[0112] In some embodiments of the present application, referring to Figures 3-5 As shown, the dirt removal device 500 includes an outlet portion 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. An internal flow channel is formed between the outlet portion 513, the inlet portion 512 and the dirt removal shell 510, and the dirt removal component 520 is arranged on the internal flow channel.

[0113] The outlet portion 513 is a water outlet or a water outlet interface installed on the dirt removal shell 510.

[0114] When the water inlet and the water outlet are molded, they can be molded at one time through a water inlet and outlet interface, and installed on the dirt removal shell 510 to form the inlet part 512 and the outlet part 513.

[0115] In some embodiments of the present application, referring to Figures 3-5 As shown in the figure, the dirt removal device 500 includes a dirt removal part 520 arranged in the dirt removal shell 510, which is used for removing impurities flowing into the dirt removal shell 510. The dirt removal part 520 built in the dirt removal shell 510 plays a major role in adsorbing and removing impurities.

[0116] In some embodiments of the present application, referring to Figures 3-5 As shown in the figure, the dirt removal device 500 includes a dirt removal part 520 arranged in the dirt removal shell 510, which is used for removing impurities flowing into the dirt removal shell 510. The dirt removal part 520 built in the dirt removal shell 510 plays a major role in adsorbing and removing impurities.

[0117] A dirt discharge flow channel is formed between the dirt discharge part 511 and the inlet part 512, and the dirt removal part 520 is on the dirt discharge flow channel.

[0118] When the dirt discharge part is opened, the water flow entering from the inlet part 512 will be filtered by the dirt removal part 500, part of which will be discharged from the outlet part 513, and part of which will flow along the dirt discharge flow channel. When the water flow channel flows through the dirt removal part 520 on the dirt discharge flow channel, it will drive the impurities accumulated in the dirt removal part 520, thereby achieving the effect of automatic flushing and discharging impurities.

[0119] In some embodiments of the present application, the dirt discharge part 511 is a dirt discharge port formed on the dirt removal shell 510, which constitutes an impurity discharge port. Through the dirt discharge port, the impurities adsorbed by the dirt removal part 520 can be discharged from the dirt discharge shell.

[0120] In some embodiments of the present application, the dirt removal device 500 includes a dirt removal opening and closing part 530, which is assembled into the dirt removal shell 510 to open or close the dirt removal part.

[0121] When the dirt removal opening and closing part 530 is in the closed state, the water flow enters the dirt removal shell 510 from the inlet part, then flows through the dirt removal part 520, and is adsorbed and removed by the dirt removal part 520. After that, the water flow is discharged from the outlet part. At this time, the water flow in the water circulation loop 200 continues to run stably, and the entire heat pump unit maintains a stable running state.

[0122] When the dirt removal opening and closing member 530 is in the open state, the dirt removal part is opened correspondingly, at this time, the water flow entering into the dirt removal shell 510 will flow through the dirt removal component 520, and part of the water flow will flow through the dirt removal component 520 and then flow to the dirt removal part, part of which will flow to the outlet part 513, and the part flowing to the dirt removal part can take away the impurities accumulated or adsorbed on the dirt removal component 520, and then discharge the impurities out of the dirt removal shell 510, thereby realizing the automatic discharge function of the impurities.

[0123] By opening the dirt removal opening and closing member 530 corresponding to the plugging of the dirt removal part 511, the automatic discharge of the impurities accumulated in the dirt removal component 520 can be realized.

[0124] In the above-mentioned embodiments of the present application, the heat pump unit is provided with the 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 component 520 in the dirt removal shell 510.

[0125] At the same time, the dirt removal shell 510 is provided with the dirt removal part 511 and the dirt removal opening and closing member 530, when the impurities are accumulated on the dirt removal component 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 component 520 can be automatically discharged from the dirt removal part 511, and the removal of the impurities does not need manual disassembly and cleaning of the dirt removal device 500, which reduces the artificial maintenance cost, and also avoids the problem that manual disassembly is limited by the space and has a large operation difficulty.

[0126] In some embodiments of the present application, the internal flow channel formed by the outlet part 513, the inlet part 512 and the dirt removal shell 510 is the water flow channel inside the dirt removal device 500, and the dirt removal component 520 is arranged on the internal flow channel, which can ensure that the water flow flowing into the dirt removal shell 510 can pass through the dirt removal component 520 for dirt removal.

[0127] In some embodiments of the present application, as shown in Figures 3-5 The dirt removal component 520 is formed with an accommodation space inside, and the end part is formed with an impurity discharge part 521 communicating with the accommodation space, and the impurity discharge part 521 corresponds to the position of the dirt removal part 511.

[0128] The impurities adsorbed by the dirt removal component 520 will accumulate in the accommodation space inside the inner wall of the dirt removal component, and the impurity discharge part 521 at the end part is the impurity discharge port, which communicates with the internal accommodation space, and is used to ensure that the impurities adsorbed and accumulated on the dirt removal component can be discharged from the dirt removal component.

[0129] The impurity discharge part 521 of the dirt removal component 520 is arranged to correspond to the position of the dirt removal part 511, so that the impurities discharged from the impurity discharge part 521 can be discharged out of the dirt removal shell 510 along the dirt removal part 511.

[0130] In some embodiments of the present application, referring to Figures 3-5 As shown in the drawings, a filter inlet portion 522 is formed on the decontamination component, which is in abutment with the inlet portion 512.

[0131] The filter inlet portion 522 is used to guide the water flow into the containing space, and the abutment with the inlet portion 512 can ensure that all the water flow flowing out of the inlet portion 512 passes through the filter inlet portion 522 and enters the containing space.

[0132] In some embodiments of the present application, referring to Figures 3-5 As shown in the drawings, a plurality of filter channels 523 are formed on the decontamination component, which are used to guide the water flow entering the containing space from the filter inlet portion 522 to flow out of the containing space, and each filter channel 523 penetrates the decontamination component to the containing space inside the decontamination component.

[0133] The filter channel 523 penetrates the containing space, which is mainly used for filtering the water flow entering the containing space. The impurities in the water flow can be accumulated on the inner wall of the decontamination component and cannot be discharged, and finally continuously accumulate in the containing space.

[0134] In some embodiments of the present application, the filter channel 523 is a filter mesh hole formed on the decontamination component, and a plurality of filter mesh holes are uniformly distributed on the outer wall of the decontamination component.

[0135] The water flow enters the containing space through the filter inlet portion 522, and then flows outwards to the space between the decontamination shell 510 and the decontamination component through the plurality of filter mesh holes arranged around the decontamination component. The impurities in the water flow are accumulated in the decontamination component, and the water flow between the decontamination component and the decontamination shell 510 is discharged outward through the outlet portion 513 of the entire decontamination shell 510.

[0136] If the decontamination device 500 needs to discharge impurities at this time, the filtered water flow entering the space between the decontamination component and the decontamination shell 510 will flow downwards along the inner wall of the decontamination component through the impurity discharge portion 521 to the discharge portion 511, thereby driving the impurities to be discharged.

[0137] In some embodiments of the present application, referring to Figures 3-5 As shown in the drawings, the decontamination component is vertically arranged in the decontamination shell 510 or is arranged at an angle relative to the vertical direction, and the discharge portion 511 is arranged below the decontamination component.

[0138] The dirt removal component is vertically or obliquely arranged at a certain angle relative to the vertical direction, so that the impurities accumulated on the inner wall of the dirt removal component can be discharged to the drain 511 under the joint action of gravity and water flow when the drain 511 is opened, and the impurities can be discharged more quickly, thereby improving the discharge efficiency of the impurities.

[0139] In some embodiments of the present application, the dirt removal component is obliquely arranged at an angle of 5-10 degrees relative to the vertical direction, and a smaller oblique angle can also ensure that the impurities can fall by gravity.

[0140] In some embodiments of the present application, the dirt removal component is obliquely arranged at an angle of 5-10 degrees relative to the vertical direction, and a smaller oblique angle can also ensure that the impurities can fall by gravity.

[0141] In some embodiments of the present application, as shown in Figures 1-2 The dirt removal shell 510 includes a dirt removal main section 514, and the dirt removal main section 514 is provided with a support and fixing portion 515 for supporting and fixing the dirt removal component 520.

[0142] The support and fixing portion 515 is a support and fixing groove formed on the dirt removal main section 514, which is annular, and the end of the dirt removal component 520 is provided with a plug-in table matched with the support and fixing groove, so that the dirt removal component 520 can be plugged into the support and fixing groove through the plug-in table.

[0143] In some embodiments of the present application, the dirt removal shell 510 includes a drain section, which includes a guide section 516 connected to the drain main section and an assembly section 517 connected to the guide section 516, and the drain section 511 is formed at the assembly section 517.

[0144] The above-mentioned embodiments have the following advantages and effects: the dirt removal main section 514 can be used to mainly accommodate the dirt removal component 520, and the support and fixing portion 515 above the dirt removal main section 514 can support and fix the dirt removal component 520;

[0145] The drain section is mainly used for discharging impurities, and the dirt removal component 520 can be guided to the drain section 511 on the assembly section 517 through the guide section 516 connected to the drain main section, so that the impurities can be smoothly and quickly discharged from the drain shell.

[0146] In some embodiments of the present application, as shown in Figures 1-2 A water flow detection sensor 720 is arranged on the water circulation loop 200, which is arranged between the indoor terminal 220 backwater end and the plate heat exchanger 140, and is used for detecting water flow pressure.

[0147] In some embodiments of the present application, the heat pump unit has a control unit in communication with the water flow detection sensor 720, which can obtain the water flow value of the water flow detection sensor 720.

[0148] When in use, the control unit can also obtain the water flow value of the water flow sensor to determine the degree of impurity accumulation.

[0149] When the amount of impurity accumulation is large, the water flow is blocked, and the water flow on the water circulation loop 200 must be reduced. Therefore, when the heat pump unit is running, the value of the water flow detection sensor 720 can be detected to control the opening or closing of the dirt removal opening and closing member 530 accordingly.

[0150] When the dirt removal opening and closing member 530 is opened, the opening time of the dirt removal opening and closing member 530 can also be set according to the size of the water flow value of the water flow detection sensor 720. For example, when the water flow value is small, it means that the impurity accumulation is large, and the dirt removal opening and closing member 530 can be opened for a longer time to ensure that the impurities are completely removed.

[0151] When the water flow value is large, it means that the impurity accumulation is small, and the dirt removal opening and closing member 530 can be opened for a shorter time to ensure the stable operation of the entire heat pump unit.

[0152] In some embodiments of the present application, the dirt removal opening and closing member 530 is a dirt removal electric valve, which can realize automatic opening and closing. In use, the control unit can be set to automatically open after a predetermined time to achieve the effect of automatic periodic impurity removal.

[0153] In some embodiments of the present application, the dirt removal component 520 has magnetism when powered, i.e., the dirt removal component 520 is an electromagnetic dirt removal member, which is mainly used for adsorbing and removing metal impurities in the water system.

[0154] The dirt removal component 520 has a first state and a second state. When in the first state, it adsorbs impurities flowing through it; when in the second state, it is separated from the impurities adsorbed by it.

[0155] The first state corresponds to the power-on state of the dirt removal component 520. The electromagnetic dirt removal member has magnetism when powered on and can generate a magnetic field. The generated magnetic field can be used to adsorb and remove metal impurities in the water flow, realizing automatic adsorption and removal of impurities in the water flow.

[0156] The second state corresponds to the power-off state of the dirt removal component 520. The electromagnetic dirt removal member loses its magnetism when powered off, so the metal impurities adsorbed on it will automatically separate from it, realizing the automatic separation effect of metal impurities and the dirt removal component 520.

[0157] The separated metal impurities can be automatically discharged outward through the dirt discharge portion 511.

[0158] In some embodiments of the present application, the decontamination shell 510 is formed with an opening portion;

[0159] A cover is assembled on the shell 310 and blocks the opening portion.

[0160] The decontamination component 520 is assembled on the cover and extends downward from the cover to a position close to the decontamination portion 511 in the shell 310.

[0161] The above embodiments have the following advantages and effects:

[0162] By assembling the decontamination component 520 on the cover and detachably connecting the cover to the opening portion, the decontamination component 520 can be disassembled and assembled by detaching and assembling the cover relative to the decontamination shell 510, which facilitates the disassembly and assembly of the decontamination component 520.

[0163] At the same time, assembling the cover at the opening portion of the decontamination shell 510 also supports the decontamination component 520, so that the decontamination component 520 can stably be in the decontamination shell 510 for impurity removal and adsorption.

[0164] In some embodiments of the present application, referring to Figures 1-2 As shown in the figure, a control valve group is arranged on the water system circulation loop for controlling the on-off of the water return pipeline 222 and the water supply pipeline 221 of the indoor terminal 220.

[0165] The control valve group includes:

[0166] A first control valve 420 is arranged on the water supply pipeline 221 of the indoor terminal 220, specifically arranged on the pipeline between the integrated 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, and the first control valve 420 is a first electromagnetic valve.

[0167] A 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, and the second control valve 430 is a second electromagnetic valve.

[0168] The first control valve 420 and the second control valve 430 can be used to control the on-off of the water supply pipeline 221 and the water return pipeline 222 of the indoor terminal 220.

[0169] In some embodiments of the present application, referring to Figure 2 As shown in the figure, the water circulation loop 200 includes a backwashing pipeline 610 connected in parallel with the decontamination device 500 and the second control valve 430, and a backwashing control valve 611 is arranged on the backwashing pipeline.

[0170] 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.

[0171] 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. During backwashing, the second control valve 430 is closed, and the backwashing control valve 611 is opened.

[0172] At this time, the water flow from the water return end of the indoor terminal 220 does not flow into the dirt removal device 500 through the second control valve 430, but flows into the dirt removal device 500 from the outlet through the backwashing pipeline and the backwashing control valve 611, thereby backwashing the dirt removal device 500. Part of the water flow from the water return end of the indoor terminal 220 flows out to the dirt removal device 500 for backwashing, and part continues to flow into the plate heat exchanger 140 for heat exchange. This method can ensure the normal operation of the water system of the entire heat pump unit, and can also realize backwashing of the impurities in the dirt removal device 500 and efficient removal of the impurities intercepted on the dirt removal component 520.

[0173] In some embodiments of the present application, the water circulation loop 200 includes a water supplement pipeline 700 connected to the water return pipeline 222 of the indoor terminal 220. The water supplement pipeline 700 is mainly used for water supplement.

[0174] After the drain opening 511 of the dirt removal component 520 is opened, the water flow in the water circulation loop 200 is reduced, and the water pressure is lowered. At this time, water supplement needs to be performed through the water supplement pipeline 700.

[0175] In some embodiments of the present application, the water supplement pipeline 700 is provided with a water supplement control unit 710. The water supplement control unit 710 includes a water supplement flow detection element and a water supplement on-off valve.

[0176] The water supplement on-off valve can control the opening and closing of the water supplement pipeline 700 to determine whether to open the water supplement function.

[0177] The water supplement flow detection element can control and detect the water supplement flow of the water supplement pipeline 700.

[0178] The refrigerant circulating in the refrigerant circulation loop is R290 refrigerant, which 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 140 may leak into the water circulation loop 200, which may cause safety problems when the water circulation loop 200 enters the indoor terminal 220.

[0179] 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 loop 200 of the heat pump unit, which is used to discharge the gas in the water circulation loop 200 and also can discharge the pressure of the water circulation loop 200, so as to avoid the leaked refrigerant entering the indoor terminal 220 as far as possible.

[0180] In some embodiments of the present application, referring to Figures 6-8 , the safety integrated device 300 is connected to the water circuit between the water supply end of the indoor terminal 220 and the plate heat exchanger 140, and can automatically discharge the gas or discharge the pressure when the gas pressure of the water system reaches the set gas pressure or / and the water pressure reaches the set water pressure.

[0181] When the water pressure in the water circulation loop 200 reaches the set water pressure, it can automatically open to discharge the pressure, so that the water pressure in the water circulation loop 200 is at the set water pressure, ensuring the stable operation of the unit.

[0182] When the gas pressure in the water circulation loop 200 reaches the set gas pressure, it can automatically open to discharge 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.

[0183] 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, and the safety integrated device 300 is arranged between the plate heat exchanger 140 side and the water supply end of the indoor terminal 220, which can ensure that the refrigerant is discharged through the safety integrated device 300 before it enters the indoor terminal 220, so as to avoid the leaked refrigerant entering the indoor terminal 220 as far as possible.

[0184] In some embodiments of the present application, referring to Figures 6-7 , the safety integrated device 300 includes a shell 310, a gas separation and discharge unit 320 assembled on the shell 310, and a pressure relief unit 330 assembled on the shell 310.

[0185] The shell 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 in the shell 310 are the same as those of the water circulation loop 200. The gas and pressure can be discharged through the pressure relief unit 330 and the gas separation and discharge unit 320 to discharge the gas and pressure of the water circulation loop 200.

[0186] The gas separation and discharge unit 320 is mainly used for separating the water and gas entering the shell 310 and discharging the gas. The water and gas are first separated, and then the gas is discharged. Through water and gas separation, the gas in the water flow can be efficiently separated, and the effect of efficient gas discharge is achieved.

[0187] The pressure relief unit 330 is mainly used for relieving the water circulation loop 200 to realize the pressure relief function of the integrated safety device 300.

[0188] The pressure relief unit 330 is an automatic pressure relief valve with a set water pressure value, which will automatically open to relieve pressure when the water pressure reaches the set water pressure value.

[0189] The gas separation and exhaust unit 320 and the pressure relief unit 330 are both assembled to the shell 310 connected to the water circulation loop 200, realizing 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 integrated safety device 300. The integrated setting mode only needs to install the integrated safety device 300 at one position of the water circulation loop 200 during assembly, without the need for installation at multiple positions, making the installation and assembly more convenient.

[0190] In some embodiments of the present application, referring to Figures 6-7 The integrated safety device 300 includes a water inlet portion 311 formed on the shell 310 for guiding the water flow in the water circulation loop 200 into the interior of the shell 310.

[0191] The water inlet portion 311 is a water inlet opening on the shell 310 or a water inlet interface member assembled to the shell 310, which communicates with the interior space of the shell 310 for allowing the water flow to enter the interior of the shell 310.

[0192] In some embodiments of the present application, the integrated safety device 300 includes a water outlet portion 312 formed on the shell 310 for guiding the water flow in the interior of the shell 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.

[0193] The water outlet portion 312 is a water outlet opening on the shell 310 or a water outlet interface member assembled to the shell 310 for discharging the water flow in the shell 310.

[0194] In some embodiments of the present application, referring to Figures 6-7 The integrated safety device 300 includes a first mounting portion 313 formed on the shell 310.

[0195] The first mounting portion 313 is a first mounting opening or a first mounting member for mounting the gas separation and exhaust unit 320.

[0196] In some embodiments of the present application, the integrated safety device 300 includes a second mounting portion 314 formed on the shell 310 for assembling the pressure relief unit 330.

[0197] The second mounting portion 314 is a second mounting hole or a second mounting member provided on the housing 310, and is used to connect and fix the pressure relief unit 330 and the housing 310 together.

[0198] The first mounting portion 313 and the second mounting portion 314 provided on the housing 310 can be used to mount the gas separation and exhaust unit 320 and the pressure relief unit 330, and to realize integrated assembly of the pressure relief and exhaust components.

[0199] In some embodiments of the present application, the gas separation and exhaust unit 320 comprises a bubble separation device, which is assembled inside the housing 310 and located on the water flow channel.

[0200] The bubble separation device is arranged on the water flow channel between the water inlet portion 311 and the water outlet portion 312, so as to ensure that the water flow entering the housing 310 can flow through the bubble separation device and be separated from gas by the bubble separation device.

[0201] The bubble separation device can be directly assembled into the internal space of the housing 310, as long as its position in the housing 310 is between the water inlet portion 311 and the water outlet portion 312, so as to ensure its gas separation function.

[0202] In some embodiments of the present application, the bubble separation device can be fixed to the internal space of the housing 310 by a buckle or a fixing bracket, so as to avoid shaking of the bubble separation device during use.

[0203] In some embodiments of the present application, the gas separation and exhaust unit 320 comprises an exhaust device 322, which is assembled on the first mounting portion 313, communicates with the internal space of the housing 310, and corresponds to the position of the bubble separation device, and is used to exhaust the gas separated by the bubble separation device.

[0204] The exhaust device 322 is assembled on the first mounting portion 313 to realize connection with the housing 310, realizes integrated arrangement, communicates with the internal space of the housing 310, and can ensure that it can exhaust the water circulation loop 200 connected with the housing 310 when it operates. The position is arranged to correspond to the bubble separation device, so that the gas separated by the bubble separation device can be directly exhausted by the exhaust device 322. Through cooperation with the bubble separation device, not only the gas in the water circulation loop 200 is efficiently separated, but also as much gas as possible in the water circulation loop 200 is exhausted, and the effect of efficient exhaust is realized.

[0205] In some embodiments of the present application, the exhaust device 322 is an 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 part 3221 and a drain port. The exhaust valve interface part 3221 is used to connect with the first mounting part 313, and the drain port is used to drain water and release pressure outwardly.

[0206] In some embodiments of the present application, the exhaust valve interface part 3221 is threadedly connected with the first mounting part 313. Through the threaded connection and 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. In the use process, there will be no water leakage, which will affect the water flow pressure in the entire water circulation loop 200.

[0207] In some embodiments of the present application, referring to FIG. 1, Figures 8-10 The shell 310 includes a side wall part 315, a top wall part 316, and a bottom wall part.

[0208] The side wall part 315 constitutes the outer surface of the shell 310. The side wall part 315 is a cylindrical surface and is arranged along the circumference of the shell 310.

[0209] The top wall part 316 is connected with the side wall part 315 and is used to constitute the top surface of the shell 310. The top wall part 316 is a circular surface and is profile-fitted with the cylindrical surface.

[0210] The water inlet part 311 and the water outlet part 312 are formed on the side wall part 315, and the water inlet part 311 and the water outlet part 312 are oppositely arranged.

[0211] The second mounting part 314 is formed on the side wall part 315 and is farther away from the top wall part 316 than the water inlet part 311, that is, the position of the second mounting part 314 is farther away from the top wall part 316 than the position of the water inlet part 311. The second mounting part 314 is arranged more downwardly, and the position of the pressure relief component assembled above the second mounting part 314 is also more downwardly. When the pressure is relieved, the water flow flows downwardly under the action of gravity and can quickly flow out along the pressure relief component for pressure relief.

[0212] The pressure relief unit 330 is obliquely connected to the shell 310. The pressure relief unit 330 is provided with a pressure relief interface part 331, which is connected to the second mounting part 314 through the pressure relief interface part 331.

[0213] The pressure relief interface part 331 is threadedly connected with the second mounting part 314. Through the threaded connection and cooperation, not only the connection between the pressure relief unit 330 and the shell 310 is realized, but also the sealing between the pressure relief unit 330 and the shell 310 is ensured. In the use process, there will be no water leakage, which will affect the water flow pressure in the entire water circulation loop 200.

[0214] The gas has small density and is separated by the bubble separation device inside the shell 310 and rises to the top area of the shell 310, and the water flow is at the bottom area. The first mounting portion 313 is formed at the position of the top wall portion 316, so that the automatic exhaust device assembled thereon is located at the top position of the shell 310, the gas concentrated at the top position can be quickly exhausted from the exhaust device 322, and the effect of rapid exhaust is achieved.

[0215] In some embodiments of the present application, the water circulation loop 200 is provided with a water pressure detection component 410.

[0216] The water pressure detection component 410 is a water pressure sensor arranged on the water outlet side of the plate heat exchanger 140, specifically between the integrated 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.

[0217] The water pressure detection component 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 timely feedback after refrigerant leakage.

[0218] In some embodiments of the present application, the heat pump unit further comprises a control portion for obtaining the water pressure value of the water pressure detection component 410 and controlling the control valve group to act according to the detected value of the water pressure detection component 410.

[0219] When the refrigerant leaks, 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 leaked refrigerant from entering the indoor.

[0220] 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 integrated safety device 300 will automatically open to exhaust and relieve pressure.

[0221] At the same time, if the refrigerant leakage causes the pressure to be too high, the control portion can also detect that the pressure value of the pressure detection component is too large, and it can control the control valve group to close the corresponding water inlet pipeline and water return pipeline 222 of the indoor terminal 220 to avoid the refrigerant from entering, and simultaneously close the pumping device 210 to avoid it from continuing to drive the water flow to flow. The cooperation of the water pressure detection component 410, the control valve group and the integrated safety device 300 can more effectively prevent the refrigerant of the plate heat exchanger 140 from leaking to the indoor side.

[0222] The above embodiments have the following advantages and effects:

[0223] 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 prevent the water flow in the water supply pipeline 221 or the return pipeline 222 from flowing into the indoor terminal 220, thereby avoiding the problem that the refrigerant enters the indoor terminal along with the water flow.

[0224] In some embodiments of the present application, referring to ​ The bubble separation device includes a bubble separation piece 321, which includes:

[0225] A plurality of annular separation strips are arranged in sequence along the height direction of the bubble separation device, and a gas discharge space 3214 is formed inside the plurality of annular separation strips.

[0226] A plurality of connecting separation strips 3212 are arranged in sequence along the circumference of the annular separation strip 3211. Each connecting separation strip 3212 connects a plurality of annular separation strips 3211 arranged 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.

[0227] In some embodiments of the present application, a plurality of protrusions 3215 are formed on each connecting separation strip 3212, and the plurality of protrusions 3215 are arranged in sequence along the height direction of the connecting separation strip 3212.

[0228] When the water flow enters, it first flows to the plurality of protrusions 3215 outside the gas discharge space 3214. When the water flow flows through the protrusions 3215, it is in contact with the protrusions 3215 and is slowed down by the resistance provided by the protrusions 3215. After flowing through the protrusions 3215, the water flow flows into the plurality of water flow channels 3213. The water flow channels 3213 are relatively narrow and also have a blocking effect on the water flow. The cooperation of the protrusions 3215 and the water flow channels 3213 slows down the water flow speed and prolongs the time of the water flow in the bubble separation device, thereby allowing the gas in the water flow to be more fully separated.

[0229] The separated gas in the water flow can be discharged outward along the gas discharge space 3214 at the middle position of the bubble separation device.

[0230] 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.

[0231] During assembly, the groups of bubble separation pieces 321 are arranged in a multilayer structure, with the groups of bubble separation pieces 321 nested with each other, and the groups of bubble separation pieces 321 arranged with the smaller outer diameters inside and the larger outer diameters outside.

[0232] 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.

[0233] The staggered arrangement ensures that the water flow contacts the groups of protrusions 3215 and the water flow channels 3213 as much as possible, thereby prolonging the time that the water flow stays in the bubble separation device as much as possible, and ensuring the bubble separation effect.

[0234] The above is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and 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 by 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 Comprise: A refrigerant circuit, which makes refrigerant circulate 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 the refrigerant in the plate heat exchanger, and is formed by at least a pumping device and at least one indoor terminal; A dirt removal device connected to the water circulation circuit, for removing impurities from the water flow before it flows into the pumping device and the plate heat exchanger, which comprises: A dirt removal shell, comprising: An inlet portion for introducing the water circulation circuit water flow into the dirt removal shell; An outlet portion for discharging the water circulation circuit water flow from the dirt removal shell; A dirt discharge portion formed on the dirt removal shell, which forms a dirt discharge flow channel with the inlet portion; A dirt removal component assembled in the dirt removal shell for removing impurities flowing into the dirt removal shell, located on the dirt discharge flow channel; A dirt removal opening and closing element assembled in the dirt removal shell for opening or closing the dirt discharge portion.

2. The heat pump unit of claim 1, wherein, An internal flow channel is formed between the outlet portion, the inlet portion and the dirt removal shell, and the dirt removal component is located in the internal flow channel.

3. The heat pump unit according to claim 1, wherein An accommodation space is formed inside the dirt removal component, and an impurity discharge portion in communication with the accommodation space is formed at the end of the accommodation space, the impurity discharge portion corresponds to the position of the dirt discharge portion, and a filter inlet portion is formed on the dirt removal component, which is in butt joint with the inlet portion; a plurality of filter channels are provided for guiding the water flow from the filter inlet portion into the accommodation space from the accommodation space, each filter channel penetrates the dirt removal component to the accommodation space. The dirt removal component is vertically arranged in the dirt removal shell or is inclined at a certain angle relative to the vertical direction, and the dirt discharge portion is arranged below the dirt removal component.

5. The heat pump unit according to claim 1, wherein 4. The heat pump unit of claim 3, wherein, The dirt removal component is magnetized and has a first state and a second state; When the dirt removal component is in the first state, it adsorbs the impurities flowing through it; When the dirt removal component is in the second state, it is separated from the adsorbed impurities.

6. The heat pump unit according to claim 5, wherein An opening portion is formed on the dirt removal shell; A cover body is assembled on the shell and seals the opening portion; The dirt removal component is assembled on the cover body and extends downward from the cover body to a position close to the dirt discharge portion in the shell. A control valve group is provided on the water circulation circuit for connecting or disconnecting the indoor terminal and the water circulation circuit, and the control valve group comprises: A first control valve provided on the water supply pipeline of the indoor terminal for connecting or disconnecting the water supply pipeline of the indoor terminal; 7. The heat pump unit of claim 2, wherein, A second control valve provided on the water return pipeline of the indoor terminal for connecting or disconnecting the water return pipeline of the indoor terminal. The water circulation circuit comprises: A backwashing pipeline connected in parallel with the dirt removal device and the second control valve, and a backwashing control valve is provided on the backwashing pipeline.

8. The heat pump unit of claim 6, wherein, The water circulation circuit comprises a water supplement pipeline connected to the water return pipeline of the indoor terminal, and a water supplement control unit is provided on the water supplement pipeline. Comprise:

9. The heat pump unit of claim 6, wherein, An integrated safety device connected to the water circulation circuit and arranged on the water outlet side of the plate heat exchanger, comprising:

10. The heat pump unit of claim 6, wherein, A shell connected to the water circulation circuit; ​ ​ An air separation and discharge unit is assembled on the shell for separating water from air entering the shell and discharging the air; A pressure relief unit is assembled on the shell for relieving pressure of the water circulation loop.

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