WO2023176438A1

WO2023176438A1 - Outdoor unit of heat pump cycle device and heat pump cycle device

Info

Publication number: WO2023176438A1
Application number: PCT/JP2023/007427
Authority: WO
Inventors: 翔太佐藤
Original assignee: 株式会社富士通ゼネラル
Priority date: 2022-03-18
Filing date: 2023-02-28
Publication date: 2023-09-21
Also published as: JP2023138153A

Abstract

An outdoor unit (2) of a heat pump cycle device has a housing (30) provided with a machine room (RB) that stores a water-refrigerant heat exchanger (15) for exchanging heat between a refrigerant and water and an electrical unit (25). The water-refrigerant heat exchanger (15) is disposed in a lower portion of the machine room (RB). The housing (30) has a service panel (40) that covers a portion of the machine room (RB) and that is detachable from the housing (30). The service panel (40) is disposed at least in a lower portion of the housing (30) so as to correspond to the region in which the water-refrigerant heat exchanger (15) is stored.

Description

Outdoor unit of heat pump cycle device and heat pump cycle device

TECHNICAL FIELD The present invention relates to an outdoor unit of a heat pump cycle device that includes a machine room in a housing in which a water-refrigerant heat exchanger and an electrical unit are housed, and a heat pump cycle device.

Generally, the outdoor unit of a heat pump cycle device has a housing that is divided into a heat exchange room and a machine room. The compressor, electrical unit, etc. are stored in the In this type of outdoor unit, the casing covers a part of the machine room, and the casing is equipped with a removable service panel, so that the service panel can be removed during construction or maintenance of the outdoor unit. There are known methods that do this (for example, see Patent Document 1).

Special Publication No. 2020/161782

By the way, some outdoor units of this type are equipped with a water-refrigerant heat exchanger in the lower part of the machine room to exchange heat between the refrigerant and water. However, in the conventional outdoor unit described in Patent Document 1, the service panel does not extend to the lower part of the machine room, making it difficult to perform maintenance work on devices disposed at the lower part of the machine room.

The disclosed technology has been made in view of the above, and provides an outdoor unit of a heat pump cycle device and a heat pump cycle device that can improve the workability of a worker when maintaining the device disposed at the lower part of a machine room. The purpose is to provide

The outdoor unit of the heat pump cycle device disclosed in the present application has a casing provided with a machine room in which a water-refrigerant heat exchanger for exchanging heat between a refrigerant and water and an electrical unit are provided, and the water heat exchanger is located in the machine room. The housing has a service panel that covers a part of the machine room and is removable from the housing, and the service panel covers at least a portion of the housing that corresponds to the area where the water-refrigerant heat exchanger is stored. It is located at the bottom of the body.

The heat pump cycle device disclosed in the present application includes an outdoor unit placed outdoors and an indoor unit placed indoors. The water heat exchanger is arranged at the bottom of the machine room, and the case has a service panel that covers a part of the machine room and is removable from the case. The service panel is disposed at least in the lower part of the housing, corresponding to the area where the water-refrigerant heat exchanger is stored.

According to the outdoor unit of the heat pump cycle device and one aspect of the heat pump cycle device disclosed in the present application, it is possible to improve the workability of the operator when maintaining the device disposed in the lower part of the machine room.

FIG. 1 is a circuit configuration diagram showing an example of a refrigerant circuit and a water circuit of a heat pump cycle device according to this embodiment. FIG. 2 is an external perspective view of the outdoor unit seen from the front side. FIG. 3 is an external perspective view of the outdoor unit viewed from the back side. FIG. 4 is a perspective view showing the internal structure of the outdoor unit. FIG. 5 is a partially enlarged perspective view of the electrical unit fixed to the partition plate in the machine room. FIG. 6 is a view of the outdoor unit from the right side with the service panel removed. FIG. 7 is a view of the service panel viewed from the inner side facing the inside of the casing. FIG. 8 is a perspective view of the outdoor unit showing the first operation of attaching the service panel to the housing. FIG. 9 is a schematic cross-sectional view for explaining the operation of attaching the service panel to the housing. FIG. 10 is a schematic cross-sectional view for explaining the operation of attaching the service panel to the housing. FIG. 11 is a schematic cross-sectional view for explaining the operation of attaching the service panel to the housing.

Hereinafter, embodiments of the outdoor unit of the air conditioner disclosed in the present application will be described in detail based on the drawings. Note that the disclosed technology is not limited to this example. Further, the embodiments shown below may be modified as appropriate within a range that does not cause contradiction.

<Configuration of heat pump cycle device>
FIG. 1 is a circuit configuration diagram showing an example of a refrigerant circuit and a water circuit of a heat pump cycle device according to this embodiment. The heat pump cycle device 1 includes an outdoor unit 2 and an indoor unit 3, and the outdoor unit 2 and the indoor unit 3 are connected by water piping to form a water circuit 4. The heat pump cycle device 1 cools or heats a room (space) in which the indoor unit 3 is placed by circulating cold water or hot water through the water circuit 4 of the outdoor unit 2 and the indoor unit 3. In addition, in FIG. 1, the heat pump cycle device 1 is illustrated as having one indoor unit 3, but it may include a plurality of indoor units 3 connected in parallel to the outdoor unit 2.

As shown in FIG. 1, the outdoor unit 2 includes a compressor 11, a four-way valve 12, an outdoor heat exchanger (heat exchanger) 13, an outdoor expansion valve 14, a water/refrigerant heat exchanger 15, and an accumulator 16. and an outdoor fan (fan) 17. These compressor 11, four-way valve 12, outdoor heat exchanger 13, outdoor expansion valve 14, water/refrigerant heat exchanger 15, and accumulator 16 are connected by refrigerant pipes 18, respectively, to form a refrigerant circuit 10. This refrigerant circuit 10 is completed inside the outdoor unit 2 to constitute a refrigeration cycle. Further, a water pipe 19 is connected to the water/refrigerant heat exchanger 15 separately from the refrigerant pipe 18 . This water pipe 19 extends outside the outdoor unit 2 and is connected to an indoor unit 23 (described later) of the indoor unit 3 to form a water circuit 4.

The compressor 11 is, for example, a high-pressure container-type variable capacity compressor whose operating capacity can be changed, and compresses the sucked low-pressure gas refrigerant and discharges the high-pressure gas refrigerant. A four-way valve 12 is connected to the refrigerant discharge side of the compressor 11, and an accumulator 16 is connected to the refrigerant suction side.

The four-way valve 12 is a valve for switching the flow direction of refrigerant in the refrigerant circuit 10, and includes a first port 12A to a fourth port 12D. The first port 12A is connected to the refrigerant discharge side of the compressor 11. The second port 12B is connected to one refrigerant inlet/outlet 13A of the outdoor heat exchanger 13. The third port 12C is connected to the refrigerant inflow side of the accumulator 16. The fourth port 12D is connected to one refrigerant inlet/outlet 15A of the water-refrigerant heat exchanger 15.

For example, a fin tube heat exchanger is used as the outdoor heat exchanger 13. The outdoor heat exchanger 13 exchanges heat between the refrigerant and the outside air taken into the outdoor unit 2 by rotation of the outdoor fan 17 . The other refrigerant inlet/outlet 13B of the outdoor heat exchanger 13 is connected to the other refrigerant inlet/outlet 15B of the water-refrigerant heat exchanger 15 via the outdoor expansion valve 14. The outdoor heat exchanger 13 functions as a condenser when the heat pump cycle device 1 performs cooling operation, and condenses (liquefies) the gas refrigerant. Moreover, the outdoor heat exchanger 13 functions as an evaporator when the heat pump cycle device 1 performs heating operation, and evaporates (vaporizes) the liquid refrigerant.

The outdoor expansion valve 14 is provided between the other refrigerant inlet/outlet 13B of the outdoor heat exchanger 13 and the other refrigerant inlet/outlet 15B of the water/refrigerant heat exchanger 15. The outdoor expansion valve 14 is, for example, an electronic expansion valve, and reduces the pressure (expands) of the liquid refrigerant passing through the outdoor expansion valve 14 by adjusting the valve opening degree.

For example, a plate heat exchanger is used as the water-refrigerant heat exchanger 15. The water/refrigerant heat exchanger 15 exchanges heat between the refrigerant circulating in the refrigerant circuit 10 and the water circulating in the water circuit 4 . The water-refrigerant heat exchanger 15 functions as an evaporator and evaporates (vaporizes) the liquid refrigerant when the heat pump cycle device 1 performs cooling operation or defrosting operation. Moreover, the water-refrigerant heat exchanger 15 functions as a condenser when the heat pump cycle device 1 performs heating operation, and condenses (liquefies) the gas refrigerant. The water refrigerant heat exchanger 15 has a water inlet 15C and a water outlet 15D, and a water pipe 19 is connected to each of the water inlet 15C and the water outlet 15D, forming a part of the water circuit 4. Further, for example, a circulation pump 21 for circulating water in the water circuit 4 is provided on the water inlet 15C side, and an air vent valve 22 for removing air that has entered the water circuit 4 is provided on the water outlet 15D side. It will be done.

The refrigerant inflow side of the accumulator 16 is connected to the third port 12C of the four-way valve 12, and the refrigerant outflow side is connected to the refrigerant inflow side of the compressor 11. The accumulator 16 is formed as a hollow pressure vessel, separates the refrigerant flowing into the accumulator into a gas refrigerant and a liquid refrigerant, and allows only the gas refrigerant to be sucked into the compressor 11.

The outdoor fan 17 is placed near the outdoor heat exchanger 13 and sends air toward the outdoor heat exchanger 13. Specifically, the outdoor fan 17 takes in outside air into the outdoor unit 2 from a suction port 44 and a suction opening 46 (described later) of the outdoor unit 2, and heat exchanges the outside air with a refrigerant in the outdoor heat exchanger 13 (described later). It is discharged from the air outlet 41 to the outside of the outdoor unit 2.

On the other hand, the indoor unit 3 includes an indoor unit 23. For example, a floor heating device or a radiator is used as the indoor unit 23. One refrigerant inlet/outlet 23A of the indoor unit 23 is connected to a water outlet 15D of the water/refrigerant heat exchanger 15. Further, the other refrigerant inlet/outlet 23B of the indoor unit 23 is connected to the water inlet 15C of the water/refrigerant heat exchanger 15 via the circulation pump 21. As a result, the indoor unit 23 is connected to the water refrigerant heat exchanger 15 through the water piping 19 to form a water circuit 4, and the indoor unit 23 radiates or absorbs heat with the water circulating in the water circuit 4. The air-conditioned space in which the indoor unit 3 is installed is heated or cooled.

<Operation during operation>
Next, the flow of refrigerant and the flow of water during operation of the heat pump cycle device 1 will be explained. Note that the broken line arrows in FIG. 1 indicate the flow of refrigerant during heating operation, and the solid line arrows indicate the flow of refrigerant during cooling operation.

When the heat pump cycle device 1 performs heating operation, the four-way valve 12 is switched so that the first port 12A and the fourth port 12D communicate with each other, and the second port 12B and the third port 12C communicate with each other. ing. Thereby, the refrigerant circuit 10 becomes a heating cycle in which the water-refrigerant heat exchanger 15 functions as a condenser and the outdoor heat exchanger 13 functions as an evaporator.

When the compressor 11 is driven with the refrigerant circuit 10 in the above state, the refrigerant discharged from the compressor 11 flows into the four-way valve 12 and from the four-way valve 12 into the water-refrigerant heat exchanger 15. The high-temperature gas refrigerant that has flowed into the water-refrigerant heat exchanger 15 is condensed by exchanging heat with the water circulating through the water circuit 4 of the water-refrigerant heat exchanger 15 through the operation of the circulation pump 21 . On the other hand, water circulating through the water circuit 4 is heated by a refrigerant in a water-refrigerant heat exchanger 15 and becomes hot water. This hot water flows into the indoor unit 23 of the indoor unit 3 through the water pipe 19 of the water circuit 4. Then, the indoor unit 23 radiates heat from the hot water, thereby heating the room in which the indoor unit 3 is installed.

The liquid refrigerant condensed by exchanging heat with water in the water-refrigerant heat exchanger 15 passes through the outdoor expansion valve 14 to be depressurized, and then flows into the outdoor heat exchanger 13. The refrigerant that has flowed into the outdoor heat exchanger 13 exchanges heat with the outside air that has flowed into the outdoor unit 2 by the rotation of the outdoor fan 17, and evaporates. The gas refrigerant evaporated in the outdoor heat exchanger 13 passes through the four-way valve 12 and the accumulator 16 in this order, and is sucked into the compressor 11 and compressed again.

Further, when the heat pump cycle device 1 performs cooling operation or defrosting operation, the four-way valve 12 has the first port 12A and the second port 12B communicating with each other, and the third port 12C and the fourth port 12D communicating with each other. are switched so that they communicate. Thereby, the refrigerant circuit 10 becomes a cooling cycle in which the water-refrigerant heat exchanger 15 functions as an evaporator and the outdoor heat exchanger 13 functions as a condenser.

When the compressor 11 is driven with the refrigerant circuit 10 in the above state, the refrigerant discharged from the compressor 11 flows into the four-way valve 12 and from the four-way valve 12 into the outdoor heat exchanger 13. The high-temperature gas refrigerant that has flowed into the outdoor heat exchanger 13 is condensed by exchanging heat with the outdoor air taken into the outdoor unit 2 by the rotation of the outdoor fan 17. Note that when the defrosting operation is performed, frost generated in the outdoor heat exchanger 13 is melted by the heat of the refrigerant flowing into the outdoor heat exchanger 13.

The liquid refrigerant condensed in the outdoor heat exchanger 13 passes through the outdoor expansion valve 14 and is depressurized, and then flows into the water-refrigerant heat exchanger 15. The liquid refrigerant that has flowed into the water-refrigerant heat exchanger 15 is evaporated by exchanging heat with the water circulating through the water circuit 4 of the water-refrigerant heat exchanger 15 by operating the circulation pump 21 . On the other hand, the water circulating in the water circuit 4 is cooled by a refrigerant in the water-refrigerant heat exchanger 15 and becomes cold water. This cold water flows into the indoor unit 23 of the indoor unit 3 through the water pipe 19 of the water circuit 4. Then, heat is absorbed from the indoor air by the cold water in the indoor unit 23, thereby cooling the room in which the indoor unit 3 is installed. Note that when defrosting operation is being performed, the circulation pump 21 is stopped to stop the circulation of water in the water circuit 4 in order to suppress a drop in indoor temperature.

The gas refrigerant evaporated in the water-refrigerant heat exchanger 15 passes through the four-way valve 12 and the accumulator 16 in this order, and is sucked into the compressor 11 and compressed again.

<Structure of outdoor unit>
Next, the appearance and internal structure of the outdoor unit 2 will be explained. FIG. 2 is an external perspective view of the outdoor unit viewed from the front side, and FIG. 3 is an external perspective view of the outdoor unit viewed from the back side. FIG. 4 is a perspective view showing the internal structure of the outdoor unit. FIG. 5 is a partially enlarged perspective view of the electrical unit fixed to the partition plate in the machine room. Note that the directions such as front and back, up and down, and left and right described below are when the outdoor unit 2 is viewed from the front side, with the outdoor unit 2 installed and the direction in which air is blown out from the air outlet 41 (described later) being the front. It shows the direction.

As shown in FIGS. 2 and 3, the outdoor unit 2 includes a rectangular parallelepiped box-shaped housing 30 in which the dimension in the left-right direction (width direction) is larger than the dimension in the front-rear direction (depth direction). This housing 30 includes a bottom plate (bottom panel) 31 arranged to face the installation surface, a top panel 32 arranged above the bottom plate 31 in the height direction, and the bottom plate 31 and the top panel 32. and a side panel section 33 that connects the casing 30 and partitions the inside and outside of the casing 30.

As shown in FIG. 4, the interior of the housing 30 is divided into a heat exchange room RA and a machine room RB by a partition plate 34 erected on the bottom plate 31. In the heat exchange room RA, an outdoor heat exchanger 13 is housed on the back side of the heat exchange room RA, and an outdoor fan 17 is housed on the front side. The outdoor heat exchanger 13 is bent into an L-shape when viewed from the top (top panel 32 side), and is supported by the bottom plate 31 along the left side from the back side of the heat exchange room RA. ing.

The outdoor fan 17 is attached to a pair of

support members

35 , 35 erected on the bottom plate 31 . The outdoor fan 17 is a so-called axial fan, and a suction port 44 (described later) formed on the outside of the outdoor unit 2, that is, on the back side of the outdoor heat exchanger 13, is driven by a fan motor (not shown) to rotate the outdoor fan 17. ) and a suction opening 46 (described later) formed on the left side surface to suck outside air into the heat exchange chamber RA. Then, the air after heat exchange in the outdoor heat exchanger 13 is blown out forward from an air outlet 41 (described later) formed on the front side of the heat exchange room RA. In this way, the outdoor unit 2 is a front-blowing type outdoor unit that blows out air after heat exchange from the front side.

In the lower space of the machine room RB, circuit components such as a compressor 11, an accumulator 16, a four-way valve 12 (FIG. 1), and an outdoor expansion valve 14 (FIG. 1), which constitute a part of the refrigerant circuit 10, are arranged. Each circuit component is connected by a refrigerant pipe 18. The compressor 11 and the accumulator 16 are fixed to the bottom plate 31. Further, in the lower space of the machine room RB, circuit components such as a water refrigerant heat exchanger 15, an air vent valve 22, and a circulation pump 21, which constitute a part of the water circuit 4, are arranged. It is connected by piping 19. In this embodiment, the water/refrigerant heat exchanger 15 is disposed near the corner between the back side and the right side in the lower space of the machine room RB (casing 30), and a water pipe 19 (described later) is connected to the back side. A connection port 47 is provided. In this embodiment, the water/refrigerant heat exchanger 15 is arranged in the lower half area of the machine room RB (casing 30), so the lower half area of the machine room RB (casing 30) is heated by the water/refrigerant heat exchanger 15. This is the area where the exchanger is stored.

Further, in the upper space of the machine room RB, an electrical unit 25 having electrical components for controlling the operations of the outdoor unit 2 and the indoor unit 3 is arranged. This electrical unit 25 includes a first control board 27, a second control board 28, and a terminal section 26 for connecting wiring (hereinafter also referred to as electric wire) such as a power line and a control line, and includes a partition plate It is fixed at 34. As shown in FIG. 5, in the upper space of the machine room RB, circuit components such as the four-way valve 12, the sensor 20, and the refrigerant pipe 18, which constitute a part of the refrigerant circuit 10, are arranged. , are arranged to avoid these circuit components. Specifically, the electrical unit 25 includes a first support member 61 formed in an L-shape when the machine room RB is viewed from above, and a second support member 62 and a third support member each formed in a linear shape. member 63. The electrical unit 25 also includes a fourth support member 64 formed in a straight line and disposed below the second support member 62, and a fifth support member 64 formed in a straight line and disposed below the third support member 63. A support member 65 is provided. These first to third support members 61 to 63 are connected in a rectangular frame shape and fixed to the partition plate 34 and the first right side portion 37B of the back panel 37. The fourth support member 64 and the fifth support member 65 are connected in an L-shape and are fixed to the partition plate 34 and the first right side portion 37B of the back panel 37. Further, the second support member 62 and the fourth support member 64 support the first control board 27, and the third support member 63 and the fifth support member 65 support the second control board 28 and the terminal section 26. . Thereby, the electrical unit 25 can be placed in the upper space of the machine room RB while avoiding interference with circuit components of the refrigerant circuit 10. In this embodiment, the second control board 28 and the terminal section 26 are arranged near the right side of the upper space of the machine room RB, facing toward the right side.

Next, the side panel portion 33 of the housing 30 will be explained. The side panel portion 33 is formed by combining a plurality of panel members. In this embodiment, as shown in FIGS. 2 and 3, the side panel section 33 includes a front panel 36, a back panel 37, a right side panel 38, a left side panel 39, and a service panel 40. These front panel 36, back panel 37, right side panel 38, and left side panel 39 are connected to two adjacent surfaces of the housing 30 and the corner sandwiched between these two surfaces when the housing 30 is viewed from above. They are each formed in an L-shape including a portion.

Specifically, the front panel 36 integrally includes a first front surface portion 36A that forms part of the front surface of the housing 30, and a first left side surface portion 36B that forms a part of the left side surface of the housing 30. . The back panel 37 integrally includes a first back surface portion 37A that forms a part of the back surface of the housing 30, and a first right side surface portion 37B that forms a part of the right side surface of the housing 30. The right side panel 38 integrally includes a second right side part 38A that forms a part of the right side of the housing 30, and a second front side part 38B that forms a part of the front surface of the housing 30. The left side panel 39 integrally includes a second left side part 39A that forms a part of the left side of the housing 30, and a second back side part 39B that forms a part of the back side of the housing 30.

The first front part 36A of the front panel 36 is arranged on the front side of the heat exchange room RA, and the second front part 38B of the right side panel 38 is arranged on the front side of the machine room RB. The first front surface section 36A and the second front surface section 38B are arranged side by side on the left and right, and form the front surface of the housing 30. A blowout port 41 from which air heat exchanged inside the heat exchange chamber RA blows out is formed in the first front portion 36A. This air outlet 41 has, for example, a circular bell mouth 41A, and a part of the outdoor fan 17 is disposed within this bell mouth 41A. A net-like fan guard 42 that covers the air outlet 41 is provided in front of the front panel 36 . This fan guard 42 is formed in an L-shape when viewed from above, and is arranged along the first left side surface portion 36B from the first front surface portion 36A of the front panel 36. The fan guard 42 is fixed to the front panel 36 with a predetermined distance between the upper end (upper end) 42A of the fan guard 42 and the top panel 32. Further, above the air outlet 41 in the first front section 36A, a water shielding plate 43 extending in the left-right (width) direction is provided.

The first back surface portion 37A of the back panel 37 and the second back surface portion 39B of the left side panel 39 are arranged side by side with an interval between them to form the back surface of the housing 30. The outdoor heat exchanger 13 is arranged to be exposed between the first back surface portion 37A and the second back surface portion 39B, and this exposed area becomes the suction port 44. A net-like fingered 45 is provided behind the suction port 44 . Further, the first back section 37A is arranged on the back side of the machine room RB, and a pair of connection ports 47 for connecting to the water piping 19 of the water circuit 4 is provided at the lower part of the first back section 37A. , 47, and a wiring port 48 for introducing wiring (electric wire) connected to the above-mentioned electrical unit 25 into the housing 30.

The second right side part 38A of the right side panel 38 and the first right side part 37B of the back panel 37 are arranged in front and back with an interval between them. side). The above-described service panel 40 is removably disposed between the second right side portion 38A and the first right side portion 37B. By removing this service panel 40, the interior of the machine room RB can be accessed, and maintenance of the electrical unit 25 and various circuit components can be easily performed.

The second left side part 39A of the left side panel 39 and the first left side part 36B of the front panel 36 are arranged in front and behind to form a left side surface that connects the front and back surfaces of the housing 30. The second left side portion 39A faces a part of the outdoor heat exchanger 13, and a plurality of suction openings 46 are formed in the second left side portion 39A.

Furthermore, since the outdoor unit 2 is heavy, the side panel section 33 of the housing 30 is provided with a plurality of

handles

51, 52, 53 for transporting the outdoor unit 2. These handle portions 51 to 53 are arranged near the corners of the housing 30, respectively. That is, the plurality of handles 51 to 53 are provided on the rear panel 37, the right side panel 38, and the left side panel 39, respectively, avoiding the service panel 40. Furthermore, when working on equipment in the machine room RB with the service panel 40 removed, for example, even if a situation arises in which the wires do not reach the terminal section 26 during wiring, the handle sections 51 to 53 can be removed. The outdoor unit 2 can be easily moved using the

<Service panel>
Next, the service panel 40 will be explained. FIG. 6 is a view of the outdoor unit from the right side with the service panel removed. FIG. 7 is a view of the service panel viewed from the inner side facing the inside of the casing. As described above, the outdoor unit 2 of the heat pump cycle device 1 according to the present embodiment has circuits such as the water-refrigerant heat exchanger 15, the air vent valve 22, and the circulation pump 21 in the machine room RB provided in the housing 30. Equipped with component parts. The water-refrigerant heat exchanger 15 is supported on the bottom plate 31 and is arranged near the corner between the back side and the right side in the lower space of the machine room RB. Further, at the lower part of the first back surface portion 37A of the back panel 37 that forms part of the back surface of the casing 30, there is a connection port 47 for connecting to the water pipe 19, and a connection port 47 for introducing an electric wire into the casing 30. A wiring port 48 is provided. Further, in the upper space of the machine room RB, an electrical unit 25 having a terminal portion 26 to which electric wires introduced into the housing 30 are connected through the wiring port 48 is provided.

Therefore, in order to carry out various operations on the electrical unit 25 and circuit components in the machine room RB during construction and maintenance of the outdoor unit 2, the casing 30 covers a part of the machine room RB and covers the casing. 30 is provided with a detachable service panel 40. In this embodiment, the service panel 40 is provided on the right side of the housing 30 (the side on the machine room RB side). Specifically, as shown in FIG. 6, the right side panel 38 includes a first support portion 38A1 formed integrally with the second right side portion 38A, and the back panel 37 includes a first support portion 38A1 integrally formed with the first right side portion 37B. A second support portion 37B1 is provided. A working opening 55 is formed between the first support portion 38A1 and the second support portion 37B1. The opening 55 is formed to a position where the bottom plate 31 of the machine room RB is exposed. The service panel 40 is supported by the housing 30 (first support section 38A1 and second support section 37B1) so as to cover this opening 55. The first support portion 38A1 and the second support portion 37B1 are portions that function as both side edges of the opening portion 55 covered by the service panel 40, and the first support portion 38A1 and the second support portion 37B1 are provided in the vertical direction. Long slits 60, 60 are formed in. Furthermore, when the service panel 40 is attached to the housing 30, the opening 55 becomes an area covered by the inner surface 40A (described later) of the service panel 40. Furthermore, in this embodiment, since the service panel 40 is arranged on the right side of the housing 30, the dividing line between the service panel 40, the right side panel 38, and the rear panel 37 is not visible from the front side. The design of the outdoor unit 2 is not impaired.

The service panel 40 is arranged at least in the lower part of the housing 30 corresponding to the area where the water-refrigerant heat exchanger 15 is arranged, but as in the present embodiment, it extends from the lower part to the upper part of the housing 30. It may also be located in the same location. Here, the lower part of the casing 30 refers to an area where the water/refrigerant heat exchanger 15 is arranged, for example, an area from the bottom plate 31 of the casing 30 to the upper surface of the water/refrigerant heat exchanger 15. Further, the upper part of the casing 30 refers to the area where the electrical unit 25 is arranged, for example, the area from the top panel 32 of the casing 30 to the lower end of the electrical unit 25. In this embodiment, the service panel 40 is arranged to extend from the bottom plate 31 of the housing 30 to the top panel 32. Therefore, by simply removing one service panel 40, the inside of the machine room RB is exposed from the bottom plate 31 to the top panel 32 of the housing 30.

Specifically, as shown in FIG. 6, the terminal portion 26 of the electrical unit 25 and the second control board 28 are arranged so as to be visible through the opening 55 in the upper part of the machine room RB. This second control board 28 is equipped with, for example, a 7-segment display section (not shown) that displays error information and various settings, as well as dip switches and push switches for setting capacity, etc. . Therefore, by removing the service panel 40, a worker can easily access the second control board 28 of the electrical unit 25, making it easy to set equipment and obtain error information during construction or maintenance. . Further, the second control board 28 is provided with, for example, a connector for the circulation pump 21 of the water circuit 4 and a flow rate sensor/water temperature thermistor (not shown). Therefore, at the time of manufacturing the outdoor unit 2, a part of the water circuit 4 including the water refrigerant heat exchanger 15 and the circulation pump 21 can be easily installed later in a separate process or in a separate factory. Further, the operator introduces the electric wire into the housing 30 through the wiring port 48 while directly facing the opening 55, and visually checks the electric wire when connecting the introduced electric wire to the terminal section 26. Wiring work can be done easily because the work can be done while the machine is in use. In this way, it is not necessary to move between the front side and the back side of the casing 30 many times, and the workability of the operator during construction and maintenance can be improved.

In addition, circuit components such as the water-refrigerant heat exchanger 15, the circulation pump 21, and the air vent valve 22 are arranged in a lower part of the machine room RB so as to be visible through the opening 55. Therefore, by removing the service panel 40, the operator can access, for example, the air vent valve 22, making it easier to bleed out the air that has entered the water/refrigerant heat exchanger 15 and the water circuit 4.

Furthermore, the electrical unit 25 and the air vent valve 22 are arranged side by side in the vertical direction, and the circuit components of the water circuit 4 including the air vent valve 22 are arranged below the electrical unit 25. Therefore, by removing the service panel 40, the operator can access both the terminal section 26 and the air vent valve 22 of the electrical unit 25, and perform wiring and maintenance work on the electrical unit 25, as well as the water-refrigerant heat exchanger 15. and removing air that has entered the water circuit 4. Further, since the circuit components of the water circuit 4 including the air vent valve 22 are arranged below the electrical unit 25, even if water drips from the water pipe 19 etc. in the machine room RB, for example, , water will not splash on the electrical unit 25, and failure of the electrical unit 25 can be prevented.

Furthermore, the outdoor unit 2 includes a guide tube 57 that guides the electric wire connected to the terminal portion 26 of the electrical unit 25 into the inside of the casing 30. One end (not shown) of the guide tube 57 passes through the first back portion 37A located on the machine room RB side and is connected to the wiring port 48. Further, the other end 57A of the guide tube 57 is arranged so as to be visible through the opening 55. Thereby, the operator can easily guide the electric wire from the back side of the housing 30 through the guide tube 57 into the opening 55 (side side of the housing 30) that is visible to the operator. The work of connecting the electric wire to the terminal portion 26 can be easily performed. Furthermore, compared to the case where the service panel is located on the front side of the housing, the guide tube can be made shorter, improving work efficiency and reducing costs.

<Service panel installation structure>
As shown in FIG. 7, the service panel 40 is formed into a rectangular shape that is elongated in the height direction. The lower end 401, the upper end 402, and both side edges 403, 403 of the service panel 40 are each formed by being bent toward the inner surface 40A, thereby increasing the strength of the service panel 40. The service panel 40 also includes claw portions (fixing portions) 404, 404 on both

side edge portions

403, 403. When the service panel 40 is attached to the housing 30, these

claw portions

404, 404 protrude toward the inside of the housing 30. In the housing 30, a slit 60 into which the claw part 404 can be inserted is provided in the first support part 38A1 and the second support part 37B1, which are the edges of the opening 55 covered by the service panel 40. It is inserted into the

slits

60, 60 formed in the first support part 38A1 and the second support part 37B1, respectively. In this embodiment, a support structure for supporting the service panel 40 includes the above-described

claw portions

404, 404 and slits 60, 60. According to this support structure, there is no need to support the service panel 40 below the housing 30, so the opening 55 of the housing 30 can be formed to open to the bottom plate 31 of the machine room RB. Further, according to this support structure, by engaging the claw portion 404 with the housing 30, the service panel 40 can be easily temporarily supported by the housing 30, and the service panel 40 can be easily and easily supported by the housing 30 without having to release the hand from the service panel 40. You can do other work.

The

claw portions

404, 404 are provided at the center of the service panel 40 in the height direction. Specifically, the service panel 40 is formed at the center in the height direction of both side edges 403, 403, and a part of the side edges 403, 403 is formed so as to be substantially parallel to the inner surface 40A of the service panel 40. It has bent

portions

406, 406 formed by bending. The

claw portions

404, 404 are formed integrally with the

bent portions

406, 406, and extend substantially parallel to the

side edge portions

403, 403, respectively. Further, each of the claw portions 404 is formed in an L-shape with a tip thereof protruding upward after protruding in a direction perpendicular to the inner surface 40A of the service panel 40. The claw portion 404 has an upper end portion 404A that protrudes upward and can be engaged with the housing 30 after being inserted into the slit 60, and an upper end portion 404A that does not protrude downward and supports the slit 60 as described below when inserted into the slit 60. The lower end portion 404B is supported by the lower end portion 60A. The claw portion 404 also includes a contact portion 404C that comes into contact with a regulating portion (upper end) 60B of the slit 60, which will be described later, after being inserted into the slit 60.

Further, the claw portions 404 are provided at positions where the distance between the lower end portion 401 of the service panel 40 and the lower end portion 404B of each claw portion 404 is the same dimension H1. With this configuration, the distance between the lower end 401 of the service panel 40 and the lower end 404B of each claw portion 404 is the same dimension H1, making it easier for the operator to attach the service panel 40.

Furthermore, in this embodiment, the service panel 40 is formed with a handle that is inconspicuous and allows the user to safely handle the service panel 40. Specifically, the handle is formed by processing the inner surface 40A of the service panel 40 so that it cannot be visually recognized from the outside. For example, a handle 405 is formed on one (front) side edge 403 of the service panel 40 at a position above the claw portion 404 . The handle 405 is formed so that a part of the side edge 403 is folded back toward the inner surface 40A so that the operator can safely hold it. Further, the lower end portion 401 of the service panel 40 is entirely folded back toward the inner surface 40A so that it can be safely held by an operator. According to this configuration, when attaching or detaching the service panel 40, the operator can, for example, hold the lower end portion 401 with his right hand and hold the handle 405 formed on a part of the side edge portion 403 with his left hand. The service panel 40 can be held safely. In addition, since the handle of the service panel 40 is not visible from the outside, the aesthetic appearance is improved. On the other hand, when the service panel 40 is attached to the casing 30, it becomes difficult to locate the handle, which may make it difficult for an operator to remove the service panel 40. Therefore, as shown in FIG. 3, a mark 407 indicating the position of the handle 405 is provided on the outer surface 40B of the service panel 40.

Next, a procedure for attaching the service panel 40 to the housing 30 will be described.
FIG. 8 is a perspective view of the outdoor unit showing the initial operation of attaching the service panel to the housing, and FIGS. 9 to 11 are schematic cross-sectional views for explaining the operation of attaching the service panel to the housing. The top panel 32 of the housing 30 has an edge 32A that extends downwardly. The operator inserts the upper end 402 of the service panel 40 inside the edge 32A of the top panel 32 while holding the service panel 40, as shown in FIG.

Next, as shown in FIG. 9, the operator moves the service panel 40 so as to approach the first support section 38A1 and the second support section 37B1, with the upper end portion 402 of the service panel 40 as the center of rotation. The height dimension H3 of the claw portion 404 is smaller than the height dimension H2 of the slit 60. Therefore, as shown in FIG. 10, the claw portion 404 is inserted into the slit 60. Here, the slit 60 includes a support portion 60A at the lower end of the slit 60 that abuts the lower end portion 404B of the claw portion 404 and supports the service panel 40. Thereby, the service panel 40 is supported by the support portion (lower end) 60A of the slit 60. Also, at this time, since the upper end 402 of the service panel 40 is maintained inserted inside the edge 32A of the top panel 32, the upper end 402 of the service panel 40 and the edge of the top panel 32 are maintained. The portion 32A overlaps with the portion 32A by a dimension H4 in the height direction. Therefore, the service panel 40 can be prevented from falling off and falling from the housing 30. Furthermore, since the service panel 40 is prevented from tilting toward the operator, the housing 30 can temporarily support the service panel 40, and the operator can take his hand off the service panel 40 to perform other work. I can do it.

Next, as shown in FIG. 11, when the operator lifts the service panel 40 upward relative to the casing 30, the contact portion 404C of the claw portion 404 comes into contact with the restriction portion (upper end) 60B of the slit 60. The service panel 40 is restricted from being lifted any further. At this time, the upper end portion 404A of the claw portion 404 engages with the first support portion 38A1 and the second support portion 37B1, thereby positioning the through hole 408 of the service panel 40 and the screw hole 161 of the housing 30. be able to. Finally, the operator fixes the service panel 40 and the housing 30 with the screws 162 (fixing portions) to complete the installation work. In this case, a sealing material (not shown) is provided between the first support part 38A1 and the second support part 37B1 and the inner surface 40A of the service panel 40. The sealing material is, for example, foamed rubber such as spongy rubber (so-called sponge rubber) made by kneading a foaming agent into raw rubber and vulcanizing the mixture. Such a sealing material has compression recovery properties. Therefore, when the service panel 40 is lifted upward with the sealing material compressed, the first support portion 38A1, the second support portion 37B1, and the service panel 40 are separated from each other by the claw portion 404 due to the recovery property (repulsion force) of the sealant. The contact portion 404C is pressed against the restriction portion 60B of the slit 60. As a result, a frictional force is generated between the claw portion 404 and the regulating portion 60B, and a frictional force of the sealing material itself is also added, so that the service panel 40 is maintained in an upwardly lifted state. In this way, the service panel 40 is temporarily fixed to the housing 30 and will not fall. Therefore, when tightening screws, the operator does not need to hold the service panel 40 with one hand, and can easily perform the work. Note that when removing the service panel 40 from the housing 30, the above-described installation procedure may be performed in reverse.

As described above, the outdoor unit 2 of the heat pump cycle device 1 according to the present embodiment includes the casing 30 in which the machine room RB is provided in which the water-refrigerant heat exchanger 15 for exchanging heat between refrigerant and water and the electrical unit 25 are housed. However, the water-refrigerant heat exchanger 15 is arranged at the lower part of the machine room RB, and the housing 30 has a service panel 40 that covers a part of the machine room RB and is removable from the housing 30. It is arranged at least in the lower part of the housing 30, corresponding to the area where the water-refrigerant heat exchanger 15 is stored. According to this configuration, when the operator removes the service panel 40, the lower part of the machine room RB of the housing 30 is opened, so that the worker can access the water-refrigerant heat exchanger 15 arranged at the lower part of the machine room RB. This makes it possible to improve the workability of the operator when maintaining the water-refrigerant heat exchanger 15.

Further, in the outdoor unit 2 of the heat pump cycle device 1 according to the present embodiment, the electrical unit 25 is arranged above the water-refrigerant heat exchanger 15 in the machine room RB, and the service panel 40 is arranged from the bottom of the housing 30. Extends across the top. According to this configuration, when the operator removes one service panel 40, the inside of the machine room RB is exposed from the bottom to the top of the housing 30. Therefore, it is possible to access not only the water-refrigerant heat exchanger 15 located at the lower part of the machine room RB but also the electrical equipment unit 25 located at the upper part of the machine room RB. The workability of the operator when maintaining the unit 25 can be improved.

Furthermore, in the outdoor unit 2 of the heat pump cycle device 1 according to the present embodiment, the housing 30 includes a bottom plate 31 that supports the water-refrigerant heat exchanger 15 and a top panel 32 that is disposed above the bottom plate 31. However, the service panel 40 extends from the bottom plate 31 to the top panel 32. According to this configuration, when the operator removes one service panel 40, the inside of the machine room RB is exposed from the bottom plate 31 to the top panel 32 of the housing 30. Therefore, it is possible to access not only the water-refrigerant heat exchanger 15 located at the lower part of the machine room RB but also the electrical equipment unit 25 located at the upper part of the machine room RB. The workability of the operator when maintaining the unit 25 can be improved.

Furthermore, in the outdoor unit 2 of the heat pump cycle device 1 according to the present embodiment, the casing 30 is provided with handles 51 to 53 for transporting the casing 30 at a position away from the service panel 40. According to this configuration, when the service panel 40 is removed and the equipment in the machine room RB is being worked on, even if, for example, a situation arises in which the wiring does not reach the terminal section 26 during connection, the handle The outdoor unit 2 can be easily moved using 51 to 53.

In the outdoor unit 2 of the heat pump cycle device 1 according to the present embodiment, the first support portion 38A1 serves as at least the side edge 403 of the service panel 40 and the edge of the opening 55 of the housing 30 covered by the service panel 40. The second support portion 37B1 is provided with a support structure that supports the service panel 40. The edge of the opening 55 provided with this support structure does not include the bottom plate 31 serving as the lower edge. This eliminates the need to support the service panel 40 below the housing 30. Therefore, the opening 55 of the housing 30 can be formed to open up to the bottom plate 31 of the machine room RB. Further, this support structure includes a claw portion 404 and a slit 60. According to this configuration, by engaging the claw portion 404 with the casing 30, the service panel 40 can be easily temporarily supported by the casing 30, and the service panel 40 can be removed and used for other work. can do.

Furthermore, in the outdoor unit 2 of the heat pump cycle device 1 according to this embodiment, the

claws

404, 404 have the same dimension H1 from the lower end 401 of the service panel 40 when the service panel 40 is attached to the housing 30. It is installed at the position of According to this configuration, when the service panel 40 is attached to the casing 30, it is possible to prevent the service panel 40 from being bent with respect to the opening 55 formed in the casing 30. The panel 40 can be attached to the housing 30 in the correct position.

Furthermore, in the outdoor unit 2 of the heat pump cycle device 1 according to the present embodiment, the

claw portions

404, 404 are arranged so that when the service panel 40 is attached to the housing 30, they respectively protrude toward the inside of the housing 30. The housing 30 is provided with a slit 60 into which the claw part 404 can be inserted, in the first support part 38A1 and the second support part 37B1, which are the edges of the opening 55 covered by the service panel. . According to this configuration, the operator inserts the claw part 404 of the service panel 40 into the slit 60 formed in the first support part 38A1 and the second support part 37B1, which are the edges of the casing 30. The claw portion 404 can be engaged with the housing 30, the service panel 40 can be easily temporarily supported by the housing 30, and the user can take his hand off the service panel 40 to perform other work. .

In addition, in the outdoor unit 2 of the heat pump cycle device 1 according to the present embodiment, the lower end of the slit 60 is provided with the support portion 60A that supports the service panel 40 by contacting the lower end portion 404B of the claw portion 404. can be prevented from falling off from the casing 30, the operator can temporarily support the service panel 40, and can take his hand off the service panel 40 to perform other work.

In addition, in the outdoor unit 2 of the heat pump cycle device 1 according to this embodiment, since the height dimension H3 of the claw portion 404 is smaller than the height dimension H2 of the slit 60, the claw portion 404 can be easily inserted into the slit 60. The claw portion 404 can be inserted and the pawl portion 404 can be engaged with the housing 30 . Therefore, the operator can easily temporarily support the service panel 40 on the housing 30, and can take his/her hand off the service panel 40 to perform another task.

Furthermore, in the outdoor unit 2 of the heat pump cycle device 1 according to the present embodiment, the top panel 32 of the housing 30 has an edge 32A that bends and extends downward, and the edge 32A and the upper end of the service panel 40 When the lower end portion 404B of the claw portion 404 inserted into the slit 60 and the support portion 60A of the slit 60 are brought into contact with each other while the upper end portion 402 of the service panel 40 and the top panel 32 are engaged, the upper end portion 402 of the service panel 40 and the top panel 32 The edge portion 32A overlaps. According to this configuration, the service panel 40 is supported by the housing 30 by the claw portion 404 and the upper end portion 402, so that the service panel 40 can be prevented from falling off and falling from the housing 30. Furthermore, since the service panel 40 is prevented from tilting toward the operator, the service panel 40 can be temporarily fixed to the housing 30.

Although one embodiment of the outdoor unit of the heat pump cycle device in the present disclosure has been described above, the present disclosure is not limited thereto. In this embodiment, the service panel 40 has been described as having a rectangular shape, but it may have a pentagonal shape or more, or an elliptical shape, for example. Further, in this embodiment, the service panel 40 is provided on the right side of the machine room RB side of the housing 30, but at least the service panel 40 is provided on the right side of the housing 30 on the machine room RB side. As long as it is placed at the bottom of the body 30, it may be provided on the front side or the back side of the housing 30. Further, in this embodiment, one form of the claw portion 404 is illustrated, but another form may be adopted as long as it engages with the housing 30.

1 Heat pump cycle device 2 Outdoor unit 3 Indoor unit 4 Water circuit 13 Outdoor heat exchanger 15 Water refrigerant heat exchanger 17 Outdoor fan (fan)
21 Circulation pump 22 Air vent valve 25 Electrical unit 26 Terminal part 27 First control board 28 Second control board 30 Housing 31 Bottom plate 32 Top panel 32A Edge 34 Partition plate 37 Back panel 37A First back part 37B First right side part 37B1 Second support part 38 Right side panel 38A Second right side part 38A1 First support part 38B Second front part 40 Service panel

40A Inner surface

40B Outer surface 41 Air outlet 44 Suction port 48 Wiring port 55 Opening 57 Guide tube 57A Other end 60 Slit 60A Support part 401 Lower end part 402 Upper end part 403 Side edge part 404 Claw part (fixed part)
404A Upper end 404B Lower end RA Heat exchange room RB Machine room

Claims

It has a casing in which a machine room is provided that houses a water-refrigerant heat exchanger that exchanges heat between the refrigerant and water and an electrical unit,
the water refrigerant heat exchanger is located at a lower part of the machine room;
The casing includes a service panel that covers a part of the machine room and is removable from the casing,
The outdoor unit of a heat pump cycle apparatus, wherein the service panel is disposed at least at a lower portion of the casing, corresponding to an area where the water-refrigerant heat exchanger is stored.
The electrical unit is located above the water-refrigerant heat exchanger in the machine room,
The outdoor unit of a heat pump cycle apparatus according to claim 1, wherein the service panel extends from the bottom to the top of the housing.
The casing has a bottom panel that supports the water-refrigerant heat exchanger, and a top panel that is disposed above the bottom panel,
The outdoor unit of a heat pump cycle apparatus according to claim 1 or 2, wherein the service panel extends from the bottom panel to the top panel.
The outdoor unit of a heat pump cycle device according to any one of claims 1 to 3, wherein the casing includes a handle for transporting the casing at a position away from the service panel.
The outdoor heat pump cycle apparatus according to any one of claims 1 to 4, wherein the service panel is provided with a fixing part for fixing to the casing at least on a side edge of the service panel. Machine.
The outdoor unit of a heat pump cycle apparatus according to claim 5, wherein the fixing part includes a plurality of claw parts that engage with the casing.
The outdoor unit of the heat pump cycle device according to claim 6, wherein the plurality of claw portions are provided at the same dimensional position from the lower end of the service panel when the service panel is attached to the housing. .
The plurality of claw portions are each formed to protrude toward the inside of the casing when the service panel is attached to the casing,
8. The outdoor heat pump cycle apparatus according to claim 6, wherein the casing is provided with a slit in an edge of an opening covered by the service panel into which the claw part can be inserted. Machine.
The outdoor unit of a heat pump cycle device according to claim 8, further comprising a support portion provided at a lower end of the slit to abut against the lower end of the claw portion to prevent the service panel from falling.
The outdoor unit of a heat pump cycle apparatus according to claim 8 or 9, wherein the claw portion has a dimension in the height direction that is smaller than a dimension in the height direction of the slit.
The top panel of the housing has an edge that bends and extends downward, and the lower end of the claw inserted into the slit is in a state where the edge and the upper end of the service panel are engaged. When the lower end of the slit is brought into contact with the
The outdoor unit of a heat pump cycle apparatus according to claim 8 or 9, wherein the upper end of the service panel and the edge of the top panel overlap.
A heat pump cycle device comprising an outdoor unit placed outdoors and an indoor unit placed indoors,
The outdoor unit has a casing provided with a machine room that houses a water-refrigerant heat exchanger that exchanges heat between the refrigerant and water and an electrical unit;
the water refrigerant heat exchanger is located at a lower part of the machine room;
The casing includes a service panel that covers a part of the machine room and is removable from the casing,
The heat pump cycle device is characterized in that the service panel is disposed at least at a lower portion of the casing, corresponding to an area where the water-refrigerant heat exchanger is stored.