CN214746561U - Heat pump cold and hot water unit - Google Patents

Abstract

The utility model discloses a heat pump hot and cold water unit, including heat pump system and water tank, heat pump system includes compressor and cross valve, be connected with first heat transfer part between E interface and the C interface of cross valve, first check valve, the reservoir, the expansion valve, the second check valve, second heat transfer part, be equipped with first intercommunication point between first check valve and the first heat transfer part, be equipped with the second intercommunication point between first check valve and the reservoir, be equipped with the third intercommunication point between second check valve and the second heat transfer part, be equipped with the fourth intercommunication point between second check valve and the expansion valve, be equipped with first bypass between first intercommunication point and the fourth intercommunication point, first bypass is equipped with the third check valve, be equipped with the second bypass between second intercommunication point and the third intercommunication point, the second bypass is equipped with the fourth check valve; the second heat exchange component is arranged in the water tank. In the cold water mode or the hot water mode, the refrigerant flows through the expansion valve from the same direction, only one expansion valve is needed to be arranged, and the failure rate is reduced.

Description

Heat pump cold and hot water unit

Technical Field

The utility model relates to a heat pump device technical field, in particular to heat pump hot and cold water unit.

Background

The heat pump unit has the advantages of safety, energy conservation, environmental protection and no pollution, and is widely used for industrially preparing cold water and hot water. A heat pump system of the heat pump unit generally comprises a compressor, a first heat exchanger, a throttling device and a second heat exchanger, when the exhaust gas of the compressor sequentially flows through the first heat exchanger, the throttling device and the second heat exchanger, the first heat exchanger heats and the second heat exchanger cools, and when the exhaust gas of the compressor sequentially flows through the second heat exchanger, the throttling device and the first heat exchanger, the first heat exchanger cools and the second heat exchanger heats; according to the principle, the same heat pump system can be used for refrigerating and can also be switched into heating; however, since the throttling device usually employs an expansion valve, which is not capable of reversely flowing, the conventional heat pump chiller-heater unit needs to have two expansion valves to implement cooling and heating, such as the recyclable heat pump unit disclosed in patent CN202350387U, which results in a complex structure of the heat pump system and an increased failure rate.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a heat pump hot and cold water unit.

The heat pump cold and hot water unit comprises a heat pump system and a water tank, wherein the heat pump system comprises a compressor and a four-way valve, the compressor is provided with an air inlet interface and an air outlet interface, the air outlet interface is connected with a D interface of the four-way valve, the air inlet interface is connected with an S interface of the four-way valve, a first heat exchange component, a first one-way valve, a liquid storage device, a drying filter, an expansion valve, a second one-way valve and a second heat exchange component are sequentially connected between the E interface and the C interface of the four-way valve, a first communication point is arranged between the first one-way valve and the first heat exchange component, a second communication point is arranged between the first one-way valve and the liquid storage device, a third communication point is arranged between the second one-way valve and the second heat exchange component, a fourth communication point is arranged between the second one-way valve and the expansion valve, and a first bypass is arranged between the first communication point and the fourth communication point, the first bypass is provided with a third one-way valve, a second bypass is arranged between the second communication point and the third communication point, the second bypass is provided with a fourth one-way valve, the first one-way valve and the fourth one-way valve are both communicated towards the direction of the second communication point, and the second one-way valve and the third one-way valve are both communicated towards the direction opposite to the fourth communication point; the second heat exchange component is arranged in the water tank.

According to the utility model discloses heat pump hot and cold water unit has following technological effect at least: when a D interface of the four-way valve is communicated with an E interface, the heat pump cold and hot water unit is in a cold water mode, the exhaust of the compressor sequentially passes through the first heat exchange component, the liquid storage device, the drying filter, the expansion valve and the second heat exchange component, at the moment, the second heat exchange component can cool water in the water tank, when the D interface of the four-way valve is communicated with the C interface, the heat pump cold and hot water unit is in a hot water mode, the exhaust of the compressor sequentially passes through the second heat exchange component, the second bypass, the liquid storage device, the drying filter, the expansion valve, the first bypass and the first heat exchange component, and at the moment, the second heat exchange component can heat the water in the water tank; in the cold water mode or the hot water mode, the refrigerant flows through the expansion valve from the same direction, only one expansion valve is needed to be arranged, and the failure rate is reduced.

According to some embodiments of the utility model, heat pump hot and cold water unit still includes the bed frame, the bed frame is equipped with a plurality ofly heat pump system, all heat pump system's second heat transfer part all locates in the water tank. The multiple heat pump systems are arranged, so that the efficiency of preparing cold water or hot water can be improved, meanwhile, the multiple heat pump systems are mutually independent, and the operation of other heat pump systems cannot be influenced even if some heat pump systems break down.

According to some embodiments of the present invention, the base frame comprises a plurality of unit frames, all the unit frames are sequentially arranged from left to right, all the unit frames correspond to all the heat pump systems one by one, a compressor, a four-way valve, a first heat exchange component, a liquid reservoir, a drying filter and an expansion valve of the heat pump system are collectively called as first components, and all the first components are respectively arranged on the corresponding unit frames; the water tank is the column of horizontal setting, the water tank extends to the unit frame that is located the right-hand member from the unit frame that is located the left end. All first components can be arranged in order and placed, and troubleshooting and maintenance are facilitated.

According to some embodiments of the present invention, the base frame has an upper space and a lower space, all of the first heat exchange components are fin heat exchangers, and all of the first heat exchange components are disposed in the upper space; all the compressors, all the four-way valves, all the liquid reservoirs, all the drying filters, all the expansion valves and the water tank are arranged in the lower layer space. The downside of bed frame is located to the great, great part of vibrations of quality, rational in infrastructure, and heat pump hot and cold water unit is difficult for empting, and the upside of bed frame is located to first heat transfer part moreover, is favorable to carrying out the forced air cooling.

According to the utility model discloses a some embodiments, lower floor's space has first region, second area and third area, first region the second area with the third area sets up in order along the fore-and-aft direction, all the compressor all locates in the first area, the water tank is located in the third area, the bottom in second area is equipped with the bottom plate, all the cross valve, all the reservoir, all drying filter all locates in the second area. Comparatively little, scattered part are placed to the regional department of second, set up the bottom plate and can place these parts better, and the compressor need not to set up the bottom plate and also can place steadily on the bed frame, but also is favorable to the heat dissipation of compressor, and the water tank can directly be placed on the bed frame, and simple structure reduces the use of material.

According to some embodiments of the present invention, the heat pump system further comprises a liquid indication mirror, the liquid indication mirror is connected to the drying filter and between the expansion valves. By arranging the liquid indicating mirror between the drying filter and the expansion valve, maintenance personnel can observe the state of the refrigerant entering the expansion valve, and further judge the running condition of the heat pump system.

According to some embodiments of the utility model, the heat pump system still includes vapour and liquid separator, vapour and liquid separator connect in the S interface of cross valve with between the interface admits air, vapour and liquid separator locates in the second region. The gas-liquid separator can prevent the compressor from being damaged by liquid impact caused by the liquid refrigerant sucked into the air inlet interface of the compressor, and is arranged in the second area with the bottom plate, so that the gas-liquid separator is convenient to install.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a front view of a heat pump water chiller-heater unit according to an embodiment of the present invention;

fig. 2 is a schematic top cross-sectional view of a heat pump chiller/heater unit according to an embodiment of the present invention;

fig. 3 is a left side view of the structure of the heat pump water chiller-heater unit according to the embodiment of the present invention;

fig. 4 is a schematic diagram of a heat pump system of a heat pump chiller-heater unit according to an embodiment of the present invention;

in the drawings:

100-a base frame; 110-a water tank; 120-a backplane; 210-a compressor; 220-four-way valve; 230-a first heat exchange member; 241-first connection point; 242-a second connectivity point; 243-third connectivity point; 244-fourth communication point; 251-a first one-way valve; 252-a second one-way valve; 253-a third one-way valve; 254-a fourth one-way valve; 260-a reservoir; 270-drying the filter; 280-liquid display mirror; 290-an expansion valve; 291-second heat exchange means; 292-gas-liquid separator.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "a" or "an" mean one or more, the terms "a" or "an" mean two or more, the terms larger than, smaller than, exceeding, and the like are understood to include the number, and the terms "larger than, smaller than, within, and the like are understood to include the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

A heat pump chiller/heater unit according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

The heat pump cold and hot water unit according to the embodiment of the present invention comprises a heat pump system and a water tank 110, the heat pump system comprises a compressor 210 and a four-way valve 220, the compressor 210 has an air inlet interface and an air outlet interface, the air outlet interface is connected with a D interface of the four-way valve 220, the air inlet interface is connected with an S interface of the four-way valve 220, a first heat exchange component 230, a first check valve 251, a reservoir 260, a drying filter 270, an expansion valve 290, a second check valve 252, and a second heat exchange component 291 are sequentially connected between the E interface and the C interface of the four-way valve 220, a first connection point 241 is arranged between the first check valve 251 and the reservoir 260, a second connection point 242 is arranged between the second check valve 252 and the second heat exchange component 291, a fourth connection point 244 is arranged between the second check valve 252 and the expansion valve 290, a first bypass is arranged between the first connection point 241 and the fourth connection point 244, the first bypass is provided with a third check valve 253, a second bypass is arranged between the second communication point 242 and the third communication point 243, the second bypass is provided with a fourth check valve 254, the first check valve 251 and the fourth check valve 254 are both communicated towards the direction of the second communication point 242, and the second check valve 252 and the third check valve 253 are both communicated away from the direction of the fourth communication point 244; the second heat exchange member 291 is provided in the water tank 110.

For example, as shown in fig. 4, three pipelines are communicated at a first communication point 241, a second communication point 242, a third communication point 243 and a fourth communication point 244, and three-way joints may be arranged at the four communication points when the pipelines of the heat pump system are connected; the bulb of the expansion valve 290 may be disposed at a side of a pipe between the S port and the intake port of the four-way valve 220; the first heat exchanging part 230 may be a finned heat exchanger, and the second heat exchanging part 291 may be a heat exchanging coil; the water tank 110 may be provided with a water inlet and a water outlet.

When a D interface of the four-way valve 220 is communicated with an E interface, the heat pump cold and hot water unit is in a cold water mode, the exhaust gas of the compressor 210 sequentially passes through the first heat exchange component 230, the reservoir 260, the drying filter 270, the expansion valve 290 and the second heat exchange component 291, at this time, the second heat exchange component 291 can cool the water in the water tank 110, when the D interface of the four-way valve 220 is communicated with the C interface, the heat pump cold and hot water unit is in a hot water mode, the exhaust gas of the compressor 210 sequentially passes through the second heat exchange component 291, the second bypass, the reservoir 260, the drying filter 270, the expansion valve 290, the first bypass and the first heat exchange component 230, at this time, the second heat exchange component 291 can heat the water in the water tank 110; in the cold water mode or the hot water mode, the refrigerants sequentially flow through the liquid reservoir 260, the dry filter 270 and the expansion valve 290, the refrigerants flow through the expansion valve 290 from the same direction, only one expansion valve 290 is needed to be arranged, and the failure rate is reduced; the one-way valve is a component with a simpler structure and is not easy to break down; the dry filter 270 is disposed in front of the expansion valve 290, and can filter impurities in the refrigerant, so that the refrigerant entering the expansion valve 290 is relatively clean, and the expansion valve 290 is prevented from being blocked; the accumulator 260 can cool the refrigerant which is not completely cooled again to completely reach a liquid state, and then the refrigerant enters the expansion valve 290; reservoir 260 and dry filter 270 all set up between second intercommunication point 242 and fourth intercommunication 244, and reservoir 260 and dry filter 270 all only need set up one, and simple structure reduces the fault rate.

In some embodiments of the present invention, the heat pump chiller-heater unit further includes a base frame 100, the base frame 100 is provided with a plurality of heat pump systems, and the second heat exchange components 291 of all the heat pump systems are all disposed in the water tank 110. The multiple heat pump systems are arranged, so that the efficiency of preparing cold water or hot water can be improved, meanwhile, the multiple heat pump systems are mutually independent, the operation of other heat pump systems cannot be influenced even if some heat pump systems break down, and other heat pump systems which normally operate can still perform the refrigeration or heating function on the water in the water tank 110.

In some embodiments of the present invention, the base frame 100 includes a plurality of unit frames, all the unit frames are sequentially arranged from left to right, all the unit frames correspond to all the heat pump systems one by one, the compressor 210, the four-way valve 220, the first heat exchanging component 230, the liquid reservoir 260, the drying filter 270, and the expansion valve 290 of the heat pump system are collectively referred to as first components, and all the first components are respectively disposed on the corresponding unit frames; the water tank 110 is in a horizontally arranged column shape, and the water tank 110 extends from a unit shelf at the left end to a unit shelf at the right end. Referring to fig. 2, the number of the unit racks and the number of the heat pump systems may be four, the four second heat exchange components 291 and the water tank 110 may be combined into a shell-and-tube heat exchanger, the shell-and-tube heat exchanger has a water inlet, a water outlet, four working medium inlets and four working medium outlets, and the four working medium inlets are respectively connected to the corresponding working medium outlets through four heat exchange coil pipes; all the first components are respectively arranged on the corresponding unit frames, so that all the first components can be sequentially arranged and placed, and troubleshooting and maintenance are facilitated; the water tank 110 extends from the unit shelf located at the left end to the unit shelf located at the right end, and the water tank 110 has a large length and a large volume, thereby making full use of the space in the base frame 100.

In some embodiments of the present invention, the base frame 100 has an upper space and a lower space, all the first heat exchanging parts 230 are fin heat exchangers, and all the first heat exchanging parts 230 are disposed in the upper space; all of the compressors 210, all of the four-way valves 220, all of the accumulators 260, all of the dry filters 270, all of the expansion valves 290, and the water tank 110 are disposed in the lower space. Referring to fig. 1, the first heat exchanging part 230 may be two fin heat exchangers connected in series or in parallel, and the two fin heat exchangers are disposed in a V shape, so that space can be fully utilized and a better heat exchanging effect can be achieved; after the water tank 110 is filled with water, the mass is large, the vibration of the compressor 210 is large, the parts with large mass and large vibration are arranged on the lower side of the base frame 100, the structure is reasonable, the heat pump cold and hot water unit is not prone to toppling, and the first heat exchange part 230 is arranged on the upper side of the base frame 100 and is beneficial to air cooling.

The utility model discloses an in some embodiments, lower floor's space has first region, second area and third area, and first region, second area and third area set up along the fore-and-aft direction in order, and all compressors 210 all locate in the first region, and in the third region was located to water tank 110, the bottom of second region was equipped with bottom plate 120, and all cross valves 220, all reservoirs 260, all dry filter 270 all located in the second region. Referring to fig. 2 and 3, the bottom of the base frame 100 is provided with a plurality of beams for carrying components in the lower-layer space, the first region, the second region and the third region of the lower-layer space are sequentially arranged from back to front, smaller and scattered components are arranged at the second region, the bottom plate 120 is arranged to better place the components, the four-way valve 220 can be fixed on the bottom plate 120 through a support, the compressor 210 is only arranged in the first region, the compressor 210 is larger, the bottom plate 120 is not required to be arranged and can be stably arranged on the base frame 100, the heat dissipation of the compressor 210 is facilitated, the bottom plate 120 is not required to be arranged at the bottom of the third region, the water tank 110 can be directly arranged on the base frame 100, the structure is simple, and the use of materials is reduced.

In some embodiments of the present invention, the heat pump system further comprises a liquid indicator 280, and the liquid indicator 280 is connected between the dry filter 270 and the expansion valve 290. By arranging the liquid indicating mirror 280 between the dry filter 270 and the expansion valve 290, maintenance personnel can observe the state of the refrigerant entering the expansion valve 290, and further judge the operation condition of the heat pump system; the liquid indicator 280 may be disposed on the bottom plate 120 for easy observation, and the liquid indicator 280 may be connected in series to a pipeline between the dry filter 270 and the expansion valve 290 or connected in parallel to a pipeline between the dry filter 270 and the expansion valve 290.

In some embodiments of the present invention, the heat pump system further includes a gas-liquid separator 292, the gas-liquid separator 292 is connected between the S interface of the four-way valve 220 and the air inlet interface, and the gas-liquid separator 292 is disposed in the second region. The gas-liquid separator 292 can prevent the compressor 210 from being damaged by liquid impact generated when the liquid refrigerant is sucked into the air inlet interface of the compressor 210, and the gas-liquid separator 292 is arranged in the second area with the bottom plate 120, so that the installation of the gas-liquid separator 292 is facilitated.

The above description is for the purpose of illustrating the preferred embodiments of the present invention, but the present invention is not limited to the illustrated embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the appended claims.

Claims (7)

1. A heat pump water chiller-heater unit is characterized in that: the heat pump system comprises a heat pump system and a water tank, wherein the heat pump system comprises a compressor and a four-way valve, the compressor is provided with an air inlet interface and an exhaust interface, the exhaust interface is connected with a D interface of the four-way valve, the air inlet interface is connected with an S interface of the four-way valve, a first heat exchange component, a first one-way valve, a liquid storage device, a drying filter, an expansion valve, a second one-way valve and a second heat exchange component are sequentially connected between an E interface and a C interface of the four-way valve, a first communication point is arranged between the first one-way valve and the first heat exchange component, a second communication point is arranged between the first one-way valve and the liquid storage device, a third communication point is arranged between the second one-way valve and the second heat exchange component, a fourth communication point is arranged between the second one-way valve and the expansion valve, and a first bypass is arranged between the first communication point and the fourth communication point, the first bypass is provided with a third one-way valve, a second bypass is arranged between the second communication point and the third communication point, the second bypass is provided with a fourth one-way valve, the first one-way valve and the fourth one-way valve are both communicated towards the direction of the second communication point, and the second one-way valve and the third one-way valve are both communicated towards the direction opposite to the fourth communication point; the second heat exchange component is arranged in the water tank.

2. The heat pump chiller/heater unit of claim 1, wherein: the heat pump water chiller-heater unit further comprises a base frame, wherein the base frame is provided with a plurality of heat pump systems, and all the second heat exchange components of the heat pump systems are arranged in the water tank.

3. The heat pump chiller/heater unit of claim 2, wherein: the base frame comprises a plurality of unit frames, all the unit frames are sequentially arranged from left to right, all the unit frames correspond to all the heat pump systems one by one, a compressor, a four-way valve, a first heat exchange component, a liquid storage device, a drying filter and an expansion valve of each heat pump system are called as first components, and all the first components are respectively arranged on the corresponding unit frames; the water tank is the column of horizontal setting, the water tank extends to the unit frame that is located the right-hand member from the unit frame that is located the left end.

4. The heat pump chiller according to claim 3 wherein: the base frame is provided with an upper layer space and a lower layer space, all the first heat exchange parts are fin type heat exchangers, and all the first heat exchange parts are arranged in the upper layer space; all the compressors, all the four-way valves, all the liquid reservoirs, all the drying filters, all the expansion valves and the water tank are arranged in the lower layer space.

5. The heat pump chiller/heater unit of claim 4, wherein: the lower-layer space is provided with a first area, a second area and a third area, the first area, the second area and the third area are sequentially arranged along the front-back direction, all the compressors are arranged in the first area, the water tank is arranged in the third area, the bottom of the second area is provided with a bottom plate, and all the four-way valves, all the liquid accumulators and all the drying filters are arranged in the second area.

6. The heat pump chiller according to claim 5 wherein: the heat pump system further comprises a liquid display mirror, and the liquid display mirror is connected between the drying filter and the expansion valve.

7. The heat pump chiller according to claim 5 wherein: the heat pump system further comprises a gas-liquid separator, the gas-liquid separator is connected between an S interface of the four-way valve and the air inlet interface, and the gas-liquid separator is arranged in the second area.

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