JP6155465B2 - Heat pump equipment - Google Patents

Description

  The present invention relates to a heat pump device for heating and cooling a heat medium such as water or antifreeze.

  Conventionally, this type of heat pump device includes a refrigerant circuit in which a compressor, a water refrigerant heat exchanger, a decompressor, and an air refrigerant heat exchanger, which is an evaporator, are connected in an annular shape. There is a heat pump hot water heater that heats a heat medium by exchanging heat between the refrigerant supplied from the refrigerant circuit and a heat medium such as water or antifreeze (for example, see Patent Document 1).

  FIG. 7 shows a top perspective view of the heat pump hot water heater described in Patent Document 1. As shown in FIG.

  The heat pump hot water heating apparatus 110 shown in FIG. 7 employs a plate type water refrigerant heat exchanger 111 as a water refrigerant heat exchanger. In addition, the interior of the heat pump hot water heater 110 is divided into a machine room and a fan room by a partition plate (separator) 112, and a part of a refrigerant circuit such as a compressor 113, an expansion valve 114, and an accumulator 115 is included in the machine room. And the plate type water refrigerant heat exchanger 111 is arranged. The heat pump hot water heater 110 shown in FIG. 7 does not include a circulation pump that circulates the heat medium, and is provided separately.

  A cistern tank serving as a circulation pump and a heat medium replenishment and an expanded heat medium buffer is provided outside the heat pump hot water heating apparatus 110 and is provided toward the back of the plate-type water refrigerant heat exchanger 111. The hot water return port 111a and the hot water return port 111b are connected via a pipe to form a heat medium circuit in which the heat medium circulates.

  Accordingly, it is intended to reduce the cost by sharing parts with the separate air conditioner, and to provide an exterior body for hot water heating that is inexpensive and excellent in energy saving.

JP 2008-196777 A

  However, in the conventional configuration, since it is necessary to provide the circulation pump separately, there is a problem that the construction cost for providing the circulation pump as a separate body is increased, thereby increasing the cost.

  The present invention solves the above-mentioned conventional problems, and provides a heat pump device that is excellent in workability and maintainability while accommodating a circulation pump and a water-refrigerant heat exchanger in an integrated exterior body and reducing the size. For the purpose.

In order to solve the above-described conventional problems, a heat pump device according to the present invention includes a refrigerant circuit in which a compressor, a water refrigerant heat exchanger, a decompressor, and an evaporator are annularly connected by refrigerant piping, and the refrigerant circulates. A blower fan that blows air to the evaporator, a circulation pump that pumps a heat medium to the water refrigerant heat exchanger, a blower circuit chamber in which the blower fan is disposed, at least the compressor, and the water refrigerant heat exchanger A mechanical chamber in which the circulation pump is disposed; and an exterior body that covers the blower circuit chamber and the mechanical chamber, wherein the compressor is disposed on one end side of the mechanical chamber, and the water refrigerant The heat exchanger and the circulation pump are disposed on the other end side of the machine room, and the circulation pump exchanges the water refrigerant heat.
A heat medium inlet to the water-refrigerant heat exchanger opens toward the inside of the exterior body, and the circulation pump and the heat medium inlet are formed by a heat medium pipe. Connected to the circulation pump via a heat medium pipe, connected to a heat medium circuit outside the exterior body, and connected to the water refrigerant heat exchanger via a heat medium pipe, a heating medium outward port connected to the heating medium circuit, is characterized in that disposed on the outside of the outer body.

  As a result, a water refrigerant heat exchanger and a circulation pump are arranged in the machine room, and the heat medium flow path and the return port are arranged outside the exterior body while the heat medium flow path is configured in a space-saving manner. By installing and facilitating attachment / detachment with the heat medium circuit configured outside the heat pump device, workability and maintainability can be improved.

  According to the present invention, it is possible to provide a heat pump apparatus that is small in size and excellent in workability and maintainability.

Interior view of heat pump device according to Embodiment 1 of the present invention (A) Inside view of the heat pump device (b) Inside view of the heat pump device (c) Inside view of the heat pump device Inside view / outside perspective view showing the shape of the exterior body of the heat pump device Refrigerant circuit and heat medium circuit diagram when generating hot water in the heat pump device Refrigerant circuit and heat medium circuit diagram when generating cold water in the heat pump device Front view when the power connection part of the heat pump device is arranged on the side of the compressor Internal perspective view of a conventional heat pump device

According to a first aspect of the present invention, there is provided a refrigerant circuit in which a compressor, a water-refrigerant heat exchanger, a decompressor, and an evaporator are annularly connected by a refrigerant pipe, the refrigerant circulates, a blower fan that blows air to the evaporator, and the water A circulation pump that pumps a heat medium to the refrigerant heat exchanger, a blower circuit chamber in which the blower fan is disposed, and a machine chamber in which at least the compressor, the water refrigerant heat exchanger, and the circulation pump are disposed. And an exterior body that covers the blower circuit chamber and the machine room, the compressor is disposed on one end side of the machine room, and the water refrigerant heat exchanger and the circulation pump include the It is disposed on the other end side of the machine room, the circulation pump is disposed immediately below the water refrigerant heat exchanger, and a heat medium inlet to the water refrigerant heat exchanger is located inside the exterior body. The circulation pump and the heat medium inlet are connected by a heat medium pipe, and the circulation Amplifier is connected by heat medium pipe to the heat medium return port connected to an external heat transfer medium circuit of the exterior body, it is connected by heat medium pipe to the water refrigerant heat exchanger, connected to the heating medium circuit The heat pump device is characterized in that a heat medium going-out port is disposed outside the exterior body.

Accordingly, the water refrigerant heat exchanger and the circulation pump are arranged in the machine room, and the water refrigerant heat exchanger and the circulation pump are accommodated in an integral exterior body to achieve downsizing of the apparatus. Since the heat medium return port and the heat medium return port are provided outside, it is easy to remove the heat pump device and the heat medium circuit configured outside the heat pump device, and the workability and maintainability of the heat pump device are improved . .

In general, many of the components arranged inside the machine room are fixed to the bottom of the machine room, so that an excess space is formed above these components.

Therefore, with this configuration, the excess space inside the machine room is effectively used, and the water-refrigerant heat exchanger and the circulation pump are arranged vertically (up and down), so that the heat pump device can be further downsized. For this reason, it is possible to shorten the construction time during installation and to reduce the area required for installation outside the room (installing the outside is the main body area of the exterior body).

  Moreover, since the circulation pump and the water-refrigerant heat exchanger are disposed close to each other in the vertical direction, the heat medium pipe that connects the two is shortened, and the pressure loss of the heat medium can be reduced.

  Therefore, the power of the circulation pump can be reduced. As a result, the efficiency can be improved by reducing the power consumption, improving the efficiency, and reducing the heat dissipation loss from the piping, and the energy saving performance is excellent. It can be set as a heat pump apparatus.

  Furthermore, by reducing the pressure loss of the heat medium in the heat pump device, the applicability to an external radiator connected to the heat pump device is expanded, and the versatility of installation is increased.

Thereby, especially when the compressor is DC-driven and the circulation pump is also DC-driven, there is a possibility that resonance of cogging noise occurs and cogging noise increases. By installing them through a certain distance between the two, it is possible to provide a heat pump device in which resonance hardly occurs and the generation of abnormal noise is reduced.

In addition, since the compressor drive unit incorporating the magnet motor and the heat medium circuit are installed separately, the flow switch that detects the flow rate of the heat medium flowing in the heat medium circuit is affected by the magnetism, It is possible to prevent a malfunction and to obtain a heat pump device with stable quality.

The second invention is characterized in that, in particular, in the first invention, the circulation pump is placed on a bottom plate constituting the exterior body.

  Thereby, the circulation pump is stably fixed.

  Further, by arranging the pump on the bottom plate at the lowermost position, the vibration of the pump can be reduced, the propagation of the vibration can be prevented, and the noise can be reduced.

  In addition, the compressor operates by placing a circulation pump, which is also a heavy object, on the bottom plate on which the compressor that is the excitation source is placed by compressing and circulating the refrigerant while being a heavy object. It is possible to reduce the vibration during the operation.

Furthermore, draining of the circulation pump can be easily performed from below, and when draining, the circulation pump is at the lowest position, so that water is applied to other components during draining work. Can be prevented and maintainability can be improved .

The third invention is particularly characterized in that, in the first or second invention, the water refrigerant heat exchanger is a plate type water refrigerant heat exchanger.

  Thereby, by increasing the number of stacked plate-type water-refrigerant heat exchangers, an increase in the flow rate per channel formed between the stacked plates is suppressed, and an increase in the pressure loss of the heat medium is suppressed. The heat exchange performance can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that this implementation is not limited.

(Embodiment 1)
The heat pump apparatus in the 1st Embodiment of this invention is demonstrated below based on FIGS.

  First, the refrigeration cycle and water circuit diagram of the heat pump apparatus of FIG. 4 will be described.

  The arrows shown in FIG. 4 indicate the flow of a heat medium such as refrigerant or water or antifreeze when hot water is generated.

  Reference numeral 1 denotes an exterior body of a heat pump device for heating a circulating heat medium such as water or antifreeze, and 2 denotes an external radiator connected to the heat pump device via a heat medium pipe 3. In the circuit diagram shown in FIG. 1, a panel-like external radiator such as radiation heating and cooling is used, but a panel heater, a fan convector equipped with a blower fan, or the like may be used.

  The heat medium heated or cooled by the heat pump device to become hot water or cold water passes through the heat medium pipe 3 and is sent to the external radiator 2 to heat or cool the room where the external radiator 2 is installed. . The exterior body 1 of the heat pump device is the heat source.

  The components disposed in the exterior body 1 of the heat pump device will be described below with reference to FIGS. 1 and 4.

  Inside the exterior body 1 of the heat pump device, a compressor 4 that compresses and circulates refrigerant, a water refrigerant heat exchanger that performs heat exchange between the refrigerant and a heat medium such as water or antifreeze, and serves as a condenser when hot water is generated. 5. An expansion valve 6 serving as a decompressor and an air refrigerant heat exchanger 7 serving as an evaporator when hot water is generated are disposed.

  The compressor 4, the water refrigerant heat exchanger 5, the decompressor 6, and the air refrigerant heat exchanger 7, which is an evaporator, are sequentially connected in a ring form by a refrigerant pipe to form a closed circuit, and a refrigerant circuit 8 in which the refrigerant circulates. It is composed. The compressor 4 includes a compressor driving unit 4a in which a motor is incorporated and an accumulator 4b that stores refrigerant flowing in the refrigerant circuit 8. The refrigerant used in the refrigerant circuit 8 is, as shown in FIG. From 4b, it is sent to the compressor drive unit 4a and discharged from the compressor drive unit 4a. A four-way valve 9 is connected to the refrigerant pipe on the outlet side of the compressor 4 and the refrigerant pipe on the outlet side of the air refrigerant heat exchanger 7, and the water refrigerant heat exchanger 5 and the air refrigerant heat are connected by the four-way valve 9. The flow of the refrigerant is switched to the exchanger 7.

  Moreover, the water refrigerant heat exchanger 5 uses a plate type water refrigerant heat exchanger in which a plurality of stainless steel plates provided with irregularities are laminated and integrated by brazing. The water-refrigerant heat exchanger 5 includes a refrigerant inlet part 5a through which refrigerant enters and exits, a refrigerant outlet part 5b, a heat medium inlet part 5c through which a heat medium enters and exits, and a heat medium outlet part 5d, and a heat medium such as water or antifreeze liquid. And heat exchange between the refrigerant circulating in the refrigerant circuit 8 and heating or cooling the heat medium. The configuration of the plate type water refrigerant heat exchanger will be described in detail later.

  Reference numeral 10 denotes a blower fan that conveys air to the air refrigerant heat exchanger 7 that is an evaporator, and promotes the heat exchange capability of the air refrigerant heat exchanger 7.

  11 is a pressure sensor disposed upstream of the refrigerant inlet portion 5a of the refrigerant circuit 8 and provided for detecting the refrigerant pressure, and 12 is a compressor 4 downstream of the compressor drive unit 4a of the compressor 4. Reference numeral 14 denotes a compressor outlet temperature sensor provided in the discharge pipe 13 provided above the air heat exchanger outlet temperature sensor 14 provided in the air heat exchanger outlet pipe 15 of the air refrigerant heat exchanger 7.

On the other hand, the heat medium circuit 16 heats or cools the heat medium by circulating the heat medium and exchanging heat with the refrigerant flowing through the refrigerant circuit 8 in the water refrigerant heat exchanger 5. A circulation pump 17 forcibly circulates the heat medium flowing through the heat medium circuit 16, and is disposed on the upstream side of the water refrigerant heat exchanger 5.

  18 is a flow switch provided on the downstream side of the circulation pump 17 and on the upstream side of the heat medium inlet portion 5c of the water-refrigerant heat exchanger 5, and detects the flow rate of the heat medium. There are various configurations of the flow switch 18, but it is assumed that the flow switch 18 is stable in quality, and the proximity of the paddle 18a with a permanent magnet is detected by a proximity switch to detect the flow rate of the heat medium. The flow switch is used.

  In addition, the arrow shown in FIG. 4 has shown the flow of the refrigerant | coolant and heat medium at the time of producing | generating hot water in the water refrigerant | coolant heat exchanger 5, and when producing | generating cold water, as shown in FIG. Is switched, the refrigerant flow in the refrigerant circuit 8 is reversed. The flow of the heat medium circuit 16 is the same.

  Moreover, although the arrow shown in FIG. 4 describes that the refrigerant flows from below to above and the heat medium flows from above to below, in actuality, as shown in FIG. The refrigerant flows from the upper side to the lower side of the water refrigerant heat exchanger 5, and the heat medium flows from the lower side to the upper side of the water refrigerant heat exchanger 5.

  Reference numeral 19 denotes a heat medium forward port, which is connected to the heat medium outlet 5d of the water refrigerant heat exchanger 5 by the heat medium pipe 3, and the heat medium heated or cooled by the water refrigerant heat exchanger 5 is It becomes a passing point when led to the external radiator 2 through the heat medium pipe 3. Reference numeral 20 denotes a heat medium return port, which is connected to the circulation pump 17 by a pump outlet pipe 31, and the water refrigerant heat exchanger disposed in the exterior body 1 is connected to the heat pump flowing out from the external radiator 2. It becomes a passing point when flowing into 5.

  21 is a water refrigerant heat exchanger inlet temperature sensor for measuring the temperature of hot and cold water entering the water refrigerant heat exchanger 5, and 22 is a temperature of a heat medium such as water or antifreeze liquid on the outlet side of the water refrigerant heat exchanger 5. It is a water refrigerant heat exchanger outlet temperature sensor for measuring.

  Reference numeral 23 denotes an expansion tank provided in the heat medium circuit 16 outside the exterior body 1. When the temperature of the heat medium flowing through the heat medium circuit 16 rises and expands in volume, the expansion part absorbs the heat. This prevents abnormal pressure from being applied to the components of the medium circuit 16.

  In this way, the water refrigerant heat exchanger 5, the heat medium forward port 19, the external radiator 2, the expansion tank 23, the heat medium return port 20, and the circulation pump 17 are connected in a ring shape by the heat medium pipe 3, and the heat medium circuit. 16 is formed. In the heat medium circuit 16, the heat medium return port 20, the circulation pump 17, the water / refrigerant heat exchanger 5, and the heat medium outlet port 19 are disposed inside the exterior body 1 of the heat pump device.

  Reference numeral 24 denotes a control device that controls various actuators and sensors of the heat pump device, and reference numeral 25 denotes a remote controller that allows the user to operate the heat pump device and make various settings.

  A heat pump device in which the components of the refrigerant circuit 8 and the heat medium circuit 16 shown in FIG. 4 are laid out is shown in FIGS. 1 to 3, FIG. 1 is an interior perspective view, and FIG. 2 is an interior plan view. A front view and a three-side view of a side view, FIG. In addition, the interior view of FIG. 2 has shown the part described with the cross section AA of a front view.

  As shown in FIGS. 1 and 2, a bottom plate 26 is disposed at the lowermost portion of the exterior body 1 of the heat pump device, and a partition plate 27 for partitioning the inside of the heat pump device is provided on the bottom plate 26. The heat pump device is divided by a partition plate 27 into a blower circuit chamber 28 having a blower fan 10 and a machine chamber 29 having a refrigerant circuit 8 such as the compressor 4 and the expansion valve 6.

  The compressor 4 is mounted and fixed on the bottom plate 26 on the machine chamber 29 side, and the compressor driving unit 4 a is disposed on the partition plate 27 side, and the accumulator 4 b is disposed on the opposite side of the partition plate 27. In addition, a power supply connection portion 4 c for distributing electricity for driving the compressor 4 is provided at the top of the compressor 4. In the case of performing inverter control, the power supply connecting portion 4c has three terminals to which three phases of U, V, and W are connected.

  The water-refrigerant heat exchanger 5 is arranged inside the machine room 29 on the back side of the heat pump device and on the side opposite to the partition plate 27, that is, on the back side and side of the exterior body 1 relative to the compressor 4. Yes. Here, the water-refrigerant heat exchanger 5 includes a refrigerant inlet portion 5a, a refrigerant outlet portion 5b, a heat medium inlet portion 5c, and a heat medium outlet portion 5d, but the refrigerant inlet portion 5a, the refrigerant outlet portion 5b, and the heat medium inlet. The part 5c is disposed on the inner side of the exterior body 1 and is formed toward the inner side of the machine room 29. The heat medium outlet part 5d is located on the outer side of the machine room 29 (on the back side of the heat pump device). It is provided toward. That is, the heat medium inlet portion 5c is an inward connection port, and the heat medium outlet portion 5d is an outward connection port.

  A circulation pump 17 is disposed below the water refrigerant heat exchanger 5, and the circulation pump 17 is fixed to the bottom plate 26. The heat medium flows into the circulation pump 17 through the heat medium return port 20 and the pump inlet pipe 30 disposed on the back side of the exterior body 1 of the heat pump device.

  Further, as shown in FIGS. 1 and 2, the downstream side of the circulation pump 17 with respect to the flow direction of the heat medium and the heat medium inlet portion 5 c are connected by a pump outlet pipe 31. A flow switch 18 is disposed in the pump outlet pipe 31. From the positional relationship between the compressor 4 and the accumulator 4b, the circulation pump 17 and the water / refrigerant heat exchanger 5, the accumulator 4b and the pump outlet pipe 31 are arranged close to each other. It is provided at a position facing the accumulator 4b.

  As described above, the water refrigerant heat exchanger 5 and the circulation pump 17 are disposed inside the machine chamber 29, so that the water refrigerant heat exchanger 5 and the circulation pump 17 are accommodated inside the integrated exterior body 1. However, the heat pump device can be downsized.

  Further, since both the water-refrigerant heat exchanger 5 and the circulation pump 17 forming the heat medium circuit 16 are disposed inside the machine chamber 29, it is only necessary to remove the side plate 34 constituting the exterior body 1. The water refrigerant heat exchanger 5 and the circulation pump 17 can be caught within the field of view, and the maintainability as a heat pump device is improved.

  Further, when the circulation pump 17 is disposed below the water refrigerant heat exchanger 5 and the circulation pump 17 and the heat medium inlet portion 5c of the water refrigerant heat exchanger 5 are connected by a heat medium pipe, The exchanger 5 and the circulation pump 17 are arranged close to each other in the vertical direction (vertical direction).

  In general, many of the components arranged inside the machine room are fixed to the bottom of the machine room, so that an excess space is formed above these components. Therefore, if the water-refrigerant heat exchanger 5 and the circulation pump 17 are arranged in the vertical direction inside the machine chamber 29, the surplus space can be effectively utilized, so that the heat pump device can be further downsized, Since the piping connecting the circulation pump 17 and the water-refrigerant heat exchanger 5 can be shortened and the pressure loss and heat dissipation loss of the heat medium can be reduced, the heat exchange efficiency of the heat pump device can be improved.

When hot water is generated, the efficiency increases if it is circulated using the buoyancy of the heat medium. Therefore, in the present embodiment, in the plate-type water refrigerant heat exchanger, the heat medium inlet portion 5c
Is disposed downward and the heat medium outlet 5d is disposed upward. Furthermore, the heat medium inlet portion 5c is disposed at a position vertically below the power supply connection portion 4c of the compressor 4 with respect to the height direction (vertical direction).

  Next, with reference to FIGS. 1, 3, and 4, the layout of various components will be described in accordance with the operation for generating hot water.

  In the refrigerant circuit 8, as shown in FIG. 1, a discharge pipe 13 is disposed at the top of the compressor 4, and a four-way valve 9 is disposed above the discharge pipe. At the time of generating hot water, the four-way valve 9 and the refrigerant inlet portion 5a of the water refrigerant heat exchanger 5 are connected, and the refrigerant flows.

  Reference numeral 7 denotes an air refrigerant heat exchanger as an evaporator, which is bent in an L shape and is placed on the bottom plate 26.

  Reference numeral 10 denotes a blower fan disposed inward of the air refrigerant heat exchanger 7 and forcibly passes air through the air refrigerant heat exchanger 7 to promote heat exchange between the air and the refrigerant.

  32 is a blower motor that drives the blower fan 10, 33 is a motor support that supports the blower motor 32, and the motor support 33 is fixed to the bottom plate 26.

  Of the blower fan 10, the blower motor 32, the motor support base 33, and the air refrigerant heat exchanger 7, portions other than the refrigerant pipe connected to the expansion valve 6 and the four-way valve 9 are provided in the blower circuit chamber 28. The machine room divided by the partition plate 27 is provided with a compressor 4, a four-way valve 9, a water / refrigerant heat exchanger 5, an expansion valve 6, and a circulation pump 17.

  At the time of generating hot water, the high-temperature and high-pressure refrigerant discharged from the compressor 4 flows through the four-way valve 9 via the discharge pipe 13 and flows into the refrigerant inlet 5 a of the water-refrigerant heat exchanger 5. The refrigerant that has exchanged heat with the heat medium in the water-refrigerant heat exchanger 5 flows out from the refrigerant outlet portion 5b, is decompressed by the expansion valve 6, and then flows into the air-refrigerant heat exchanger 7, A part of the refrigerant evaporates by exchanging heat between the two. Further, the refrigerant flowing out of the air refrigerant heat exchanger 7 flows into the accumulator 4b through the four-way valve 9, and the gas-phase refrigerant flows into the compressor driving unit 4a and is compressed. Thus, the refrigerant circuit 8 in which the refrigerant circulates is configured.

  Of this refrigerant circuit 8, the refrigerant piping constituting the refrigerant circuit 8 of the portion excluding the air refrigerant heat exchanger 7 is provided above and to the side of the compressor 4 inside the machine chamber 29.

  The control device 24 is disposed above the exterior body 1 and above the circulation pump 17 and the water / refrigerant heat exchanger 5. The control device 24 is connected to a power supply line that is a high voltage portion.

  Various components and actuators as described above are accommodated in the exterior body 1 of the heat pump apparatus.

  In FIG. 3, an external / internal perspective view is shown, and what is indicated by a bold line is the exterior body 1.

  The exterior body 1 is configured by combining a front plate 34, a side plate 35, a top plate 36, and a bottom plate 26. Since the heat medium return port 19 and the heat medium return port 20 protrude from the exterior body 1 outside the exterior body 1, when the heat pump device is installed and installed, the heat medium travel port 19 and the heat medium return port 20 are respectively connected to the heat medium pipe 3 of the heat medium circuit 16 disposed outside the exterior body 1.

As described above, since the heat medium forward port 19 and the heat medium return port 20 connected to the heat medium pipe 3 of the heat medium circuit 16 formed outside the exterior body 1 are provided outside the exterior body, the exterior body 1 can be easily detached from the external heat medium circuit 16, and the workability and maintainability of the heat pump device are improved.

  Hereinafter, based on FIG. 4 and FIG. 5, operation | movement of a heat pump apparatus is demonstrated.

  First, based on FIG. 4, the operation | movement at the time of producing | generating warm water is demonstrated.

  When the user gives an operation instruction with the remote controller 25, a signal is sent from the control device, and the heat pump device starts operation. When the compressor 4 starts operating, the refrigerant compressed and discharged to a high pressure passes through the discharge pipe 13 and is sent to the four-way valve 9.

  During operation for generating hot water, the four-way valve 9 is switched so as to form a flow path through which the refrigerant flows in the direction indicated by the solid line in FIG. Therefore, the refrigerant compressed and discharged from the compressor 4 to the high pressure passes through the four-way valve 9 and is sent to the water refrigerant heat exchanger 5.

  The water / refrigerant heat exchanger 5 radiates heat by exchanging heat with a heat medium such as water or antifreeze sent from the circulation pump 17. Thereby, the heat medium such as water or antifreeze liquid changes from a low-temperature heat medium to a high-temperature heat medium.

  In the water-refrigerant heat exchanger 5, the high-temperature refrigerant flows from the upper refrigerant inlet portion 5a. Here, the refrigerant flowing in from the refrigerant inlet portion 5a is a gas-phase refrigerant. The gas-phase refrigerant is radiated to the heat medium in the water-refrigerant heat exchanger 5 and partially condensed to become a two-phase refrigerant in the gas phase and the liquid phase, and further into a liquid phase when all of the refrigerant is condensed. The refrigerant flows out from the refrigerant outlet portion 5b disposed below the water refrigerant heat exchanger 5.

  The refrigerant that has flowed out of the water refrigerant heat exchanger 5 is decompressed and expanded by the expansion valve 6 that is a decompressor, sent to the air refrigerant heat exchanger 7, and exchanges heat with the air sent by the blower fan 10, While passing through the air refrigerant heat exchanger 7, it evaporates and gasifies.

  The gasified refrigerant passes through the four-way valve 9, passes through the accumulator 4 b of the compressor 4 again, is sucked into the compressor driving unit 4 a, and is repeatedly compressed, and passes through the water refrigerant heat exchanger 5. The heat medium such as water or antifreeze is gradually heated to become a high-temperature heat medium.

  The heat medium flowing through the heat medium circuit 16 and flowing out of the water-refrigerant heat exchanger 5 is forcibly pumped to the heat medium forward port 19 by operating the circulation pump 17, and the heat medium connected to the heat medium forward port 19. It passes through the pipe 3 and is led to the external radiator 2. In the external radiator 2, heat is radiated from the heat medium, and the room where the external radiator 2 is installed is heated.

  The heat medium radiated by the external radiator 2 and having a low temperature flows through the heat medium pipe 3 to the heat medium return port 20 via the expansion tank 23. Further, the heat medium passes through the heat medium return port 20 and is again forcibly sucked into the circulation pump 17 and is forcibly sent to the water refrigerant heat exchanger 5 by the circulation pump 17. The operation of being heated by the refrigerant in the water-refrigerant heat exchanger 5 and led to the external radiator 2 is repeated. As described above, the heat medium circulates through the heat medium circuit 16, so that the heated heat medium radiates heat in the external radiator 2 and the room is heated.

  In the operation of generating hot water, the refrigerant and the heat medium flow in an opposite flow in the water / refrigerant heat exchanger 5.

The flow switch 18 disposed on the heat medium circuit 16 detects whether the heat medium is circulating in the heat medium circuit 16, and sends an abnormal signal to the control device 24 when the heat medium is not circulating. Can be stopped.

  Here, since a heat medium such as conductive water or antifreeze liquid circulates in the heat medium circuit 16, it is necessary to prevent the heat medium from touching the high voltage portion. In addition, there exist the power supply connection part 4c arrange | positioned in the compressor drive part 4a, and the control apparatus 24 as a location where a high voltage is applied.

  In particular, when performing maintenance on the clogging of the circulation pump 17 serving as power for circulating the heat medium or the malfunction of the water-refrigerant heat exchanger 5, it is necessary to remove the heat medium staying inside, It is necessary to perform maintenance while paying attention not to drop the heat medium at a location where a high voltage is applied during operation of the heat pump apparatus.

  The power supply connection portion 4c to which a high voltage is applied during operation is disposed in the compressor drive portion 4a. However, the heat medium inlet portion 5c and the circulation pump 17 are connected to the vertical direction by the power supply connection portion 4c. Is also arranged to be on the lower side.

  Accordingly, when maintenance is performed, the heat medium remaining in the water / refrigerant heat exchanger 5 and the circulation pump 17 can be removed vertically below the power supply connection portion 4c. It is possible to prevent dripping of the heat medium and improve the maintainability.

  Here, since the heat medium forward port 19 and the heat medium return port 20 are arranged so as to protrude outward of the exterior body 1, it is considered that the heat medium enters the inside of the machine chamber 29. Needless to say, maintenance is possible without any problems.

  In addition, as shown in FIG. 5, cold water can be produced | generated using the heat pump apparatus of this Embodiment. In the operation of generating cold water, the refrigerant flow is switched by the four-way valve 9 from when hot water is generated.

  At the time of generating cold water, the refrigerant that is a high-temperature and high-pressure gas phase region flowing from the compressor 4 through the four-way valve 9 is sent to the air-refrigerant heat exchanger 7 for heat exchange with air to condense, and further the expansion valve After being expanded under reduced pressure at 6, the refrigerant flows into the water-refrigerant heat exchanger 5, absorbs heat from the heat medium to cool the heat medium, and the refrigerant evaporates and gasifies. After the cooled heat medium flows out of the water-refrigerant heat exchanger 5, it flows through the heat medium circuit 16 and flows into the external radiator 2 to be cooled.

  Also in this case, since the heat medium inlet portion 5c is arranged vertically below the power supply connection portion 4c, the heat medium can be discharged smoothly during maintenance, so that maintainability can be improved. it can.

  Even when the power supply connecting portion 4c is on the side surface of the compressor driving portion 4a, if the heat medium inlet portion 5c is disposed vertically below the power supply connecting portion 4c as shown in FIG. 6, the maintainability is improved. be able to. In the heat pump device shown in FIG. 6, the compressor is arranged so that the power supply connecting portion 4 c is located on the front side of the exterior body 1, but the power supply connecting portion 4 c is connected to the side surface of the compressor driving portion 4 a. If it is disposed opposite to the side where the water-refrigerant heat exchanger 5 is disposed, the possibility that the heat medium touches the power supply connection portion 4c during maintenance can be further reduced.

  As described above, the water-refrigerant heat exchanger 5 and the circulation pump 17 are disposed inside the machine chamber 29, so that the water-refrigerant heat exchanger 5 and the circulation pump 17 are placed inside the integral exterior body 1. While accommodating, the heat pump device can be downsized.

  Further, since the heat medium return port 19 and the heat medium return port 20 connected to the heat medium pipe 3 of the heat medium circuit 16 formed outside the exterior body 1 are provided outside the exterior body, Removal from the external heat medium circuit 16 is facilitated, and workability and maintainability of the heat pump device are improved.

  Furthermore, since both the water / refrigerant heat exchanger 5 and the circulation pump 17 forming the heat medium circuit 16 are disposed inside the machine chamber 29, only the side plate 34 constituting the exterior body 1 is removed, Since the water-refrigerant heat exchanger 5 and the circulation pump 17 can be caught within the field of view, the maintainability as a heat pump device can be improved.

  At this time, when the circulation pump 17 is disposed below the water refrigerant heat exchanger 5 and the circulation pump 17 and the heat medium inlet portion 5c of the water refrigerant heat exchanger 5 are connected by a heat medium pipe, the water refrigerant Since the heat exchanger 5 and the circulation pump 17 are arranged close to each other in the vertical direction (up and down direction), and the surplus space inside the machine room 29 can be effectively used, the heat pump device can be further downsized. In addition, the piping connecting the circulation pump 17 and the water / refrigerant heat exchanger 5 can be shortened to reduce pressure loss and heat dissipation loss of the heat medium, thereby improving the heat exchange efficiency of the heat pump device. it can.

  Further, if the pressure loss of the heat medium circuit 16 is reduced, the external radiator 2 having a large pressure loss can be used without increasing the capacity of the circulation pump 17, so that the range of use as a heat pump device can be increased. It becomes possible.

  The circulation pump 17 that vibrates during operation is fixed to the bottom plate 26. In general, the compressor 4 that vibrates during operation is also fixed to the bottom plate 26. The frequency of the vibration generated by the operation of the compressor 4 is different from the frequency generated by the vibration of the circulation pump 17, and furthermore, the compressor 4 and the circulation pump 17 are heavy objects having a certain mass. By disposing the base plate 26 at a certain distance, propagation of vibration can be suppressed and low noise can be achieved.

  Further, when the compressor 4 and the circulation pump 17 are arranged at a certain distance, the flow switch 18 provided in the pump outlet pipe 31 is affected by the magnet incorporated in the motor of the compressor driving unit 4a. It can be prevented from receiving.

  Moreover, since the plate-type heat exchanger is used as the water-refrigerant heat exchanger 5, the heat exchange performance can be improved. That is, the water-refrigerant heat exchanger 5 can improve the heat exchange performance while reducing the pressure loss of the heat medium by increasing the number of stacked plates.

  As described above, the heat pump device according to the present invention is small in size, excellent in workability and maintainability, and can supply cold / hot water, so that it can be applied as an air conditioner or a hot water supply device.

DESCRIPTION OF SYMBOLS 1 Exterior body 2 External radiator 3 Heat medium piping 4 Compressor 4a Compressor drive part 4b Accumulator 4c Power supply connection part 5 Water refrigerant heat exchanger 5a Refrigerant inlet part 5b Refrigerant outlet part 5c Heat medium inlet part 5d Heat medium outlet part 6 Expansion valve (pressure reducer)
7 Air refrigerant heat exchanger 8 Refrigerant circuit 10 Blower fan 16 Heat medium circuit 17 Circulating pump 18 Flow switch 19 Heat medium forward port 20 Heat medium return port 26 Bottom plate 27 Partition plate 28 Blower circuit room 29 Machine room

Claims (3)

A refrigerant circuit in which a compressor, a water refrigerant heat exchanger, a decompressor, and an evaporator are connected in an annular shape with a refrigerant pipe and the refrigerant circulates;
A blower fan for blowing air to the evaporator;
A circulation pump for pumping a heat medium to the water refrigerant heat exchanger;
A blower circuit chamber in which the blower fan is disposed;
At least the compressor, the water refrigerant heat exchanger, a machine room in which the circulation pump is disposed, and an exterior body covering the blower circuit room and the machine room,
The compressor is disposed on one end side of the machine room,
The water refrigerant heat exchanger and the circulation pump are disposed on the other end side of the machine room,
The circulation pump is disposed directly below the water refrigerant heat exchanger,
The heat medium inlet to the water-refrigerant heat exchanger opens toward the inside of the exterior body,
The circulation pump and the heat medium inlet are connected by a heat medium pipe,
A heat medium return port connected to the circulation pump via a heat medium pipe and connected to a heat medium circuit outside the exterior body, and a heat medium pipe connected to the water refrigerant heat exchanger, the heat medium circuit A heat pump device, characterized in that a heat medium forward port connected to the outside is disposed outside the exterior body. The heat pump device according to claim 1, wherein the circulation pump is placed on a bottom plate constituting the exterior body. The heat pump apparatus according to claim 1 or 2, wherein the water refrigerant heat exchanger is a plate type water refrigerant heat exchanger.