JP2012184892A - Outdoor unit of heat pump type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that since a blower fan and a water heat exchanger are arranged in a diameter direction of the blower fan in a conventional heat pump water heater, the height of the apparatus depends on the diameter of the blower fan and on the height of the water heat exchanger, and therefore, the height of the apparatus increases under the condition of storing a blower fan and a water heat exchanger having prescribed required dimensions.SOLUTION: An outdoor unit of a heat pump water heater is provided, which includes: a housing 1; a partition plate 10 that partitions the interior of the housing 1 into a machine chamber (A) provided with a compressor 12 and an air passage chamber (B) provided with a blower fan 15 that supplies air to an air heat exchanger 14; a first heat exchanger 16 disposed below the compressor 12 in the machine chamber (A); and a second heat exchanger 21 disposed below the blower fan 15 in the air passage chamber (B), the second heat exchanger 21 separated from the first heat exchanger 16 by the partition plate 10.

Description

  The present invention relates to the structure of an outdoor unit of a heat pump water heater.

In recent years, downsizing of an outdoor unit of a heat pump water heater has been demanded in order to improve the degree of freedom of installation location. The outdoor unit of the heat pump water heater is an air heat exchanger on a base that serves as a base, a blower fan that ventilates the air heat exchanger, and a water heat exchange that exchanges heat between the refrigerant flowing through the refrigeration cycle and the liquid heat medium. And a compressor that compresses the refrigerant circulating in the refrigeration cycle, and the size and arrangement of these devices determine the size of the heat pump water heater.
Therefore, in an outdoor unit of a conventional heat pump water heater, a configuration in which the water heat exchanger is arranged below the blower fan and the upper part of the water heat exchanger is formed in an arc shape along the outer periphery of the blower fan, or There is a configuration in which the exchanger extends from a space in which a blower fan provided with a blower fan is arranged to a space in which a compressor is provided (for example, Patent Document 1).
JP 2007-155276 A (see FIGS. 1 and 4)

  However, in the outdoor unit of the conventional heat pump water heater, there is a wasteful space in the space where the compressor is provided, or the water heat exchanger is in the space where the fan is arranged and the space where the compressor is arranged In the configuration in which the heat pump water heater is extended, the height of the water heat exchanger cannot be adjusted according to the size of the blower fan or the compressor in each space, and the outdoor unit of the heat pump water heater cannot be reduced in size. there were.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to effectively utilize the space of the space where the compressor is arranged and to reduce the size of the outdoor unit of the heat pump water heater.

The outdoor unit of the heat pump water heater according to the present invention includes a housing, a partition that partitions the inside of the housing into a machine room provided with a compressor and an air passage chamber provided with a blower fan that blows air to the air heat exchanger. A plate, a first heat exchanger disposed below the compressor in the machine chamber, the first heat exchanger and the partition plate being provided in the air channel chamber, And a second heat exchanger disposed below.

  The outdoor unit of the hot water supply outdoor unit according to the present invention can be reduced in size by dividing the heat exchanger into the first space and the second space.

It is a disassembled perspective view of the housing | casing 1 of Embodiment 1 of this invention. It is a top view of the outdoor unit 100 of the heat pump water heater of Embodiment 1 of the present invention. It is a front view of the outdoor unit 100 of the heat pump water heater of Embodiment 1 of the present invention. It is a top view of the outdoor unit 200 of the heat pump water heater of Embodiment 2 of the present invention. It is a front view of the outdoor unit 200 of the heat pump water heater of Embodiment 2 of this invention. It is a top view of the outdoor unit 300 of the heat pump water heater of Embodiment 3 of the present invention. It is a front view of the outdoor unit 300 of the heat pump water heater of Embodiment 3 of this invention.

Embodiment 1 FIG.
The structure of the outdoor unit 100 (hereinafter referred to as the outdoor unit 100) of the heat pump water heater according to Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view of a housing 1 that is an outer shell of the outdoor unit 100. FIG. 2 is a top view showing the internal structure of the outdoor unit 100. FIG. 3 is a front view showing the internal structure of the outdoor unit 100.

First, the structure of the housing 1 will be described with reference to FIG. The housing 1 has a substantially rectangular parallelepiped shape including a bottom plate 2, a front plate 3, a side plate 6, a top plate 9, and a partition plate 10. The bottom plate 2 is a base plate of the housing 1 and has a substantially rectangular shape. A plurality of installation legs (not shown) for installation on the installation surface are provided at the lower part of the bottom plate 2 and serve as a foundation for the outdoor unit 100.
The front plate 3 includes a front panel 4 that is a front surface of the housing 1 and a side panel 5 that is bent from an end portion of the front panel 4 to a side surface. The side panel 5 is provided with an opening serving as an outdoor air inlet, and the front panel 4 is provided with a side opening and a circular opening serving as an air outlet through which heat is exchanged through the rear panel 5.
The side plate 6 includes a side panel 7 that forms a side surface that faces the side panel 5 of the housing 1, and a back panel 8 that is bent from the end of the side panel 7 to the back of the housing 1. The back panel 8 forms a part of the back surface of the housing 1, and the remaining back surface serves as an outdoor air inlet. Further, the side panel 7 has an opening for attaching a connection portion with an external power source and a pipe through which water for supplying hot water flows.
The top plate 9 is provided so as to cover the upper opening formed by the front plate 3 and the side plate 6.
The partition plate 10 is a plate fixed to the bottom plate 2 and arranged in a substantially vertical direction. The partition plate 10 partitions the internal space of the housing 1 into two spaces, and the rear opening side end portion of the rear panel 8 from the front panel 4. Is bent toward the end of the back panel 8 in the middle.

  Next, the internal structure of the outdoor unit 100 will be described with reference to FIGS. 2 and 3. FIG. 2 is a top view of the outdoor unit 100 with the top plate 9 removed, and FIG. 3 is a front view of the outdoor unit 100 with the top plate 9 and the front plate 3 removed. 3 is the longitudinal direction of the outdoor unit 100, the vertical direction is the height direction of the outdoor unit 100, and the horizontal direction in FIG. 2 is the depth direction of the outdoor unit 100.

  The interior of the outdoor unit 100 is divided into two spaces by the partition plate 10 as described above. In the first embodiment, in FIGS. 2 and 3, the space on the right side of the partition plate 10 is the machine room A (space A), and the space on the left side is the air passage room B (space B).

The machine room A is a space in which a compressor 12 that compresses and discharges refrigerant and a control board 13 that controls the compressor 12 are provided. The machine room A is surrounded by the front panel 4, the bottom plate 2, the side plate 6, and the top plate 9, and is configured so that dust, moisture, and the like do not enter from the outside as much as possible. The top plate 9 is provided with a cover 11 that covers the opening of the side panel 7. The cover 11 is provided with an opening, through which a plug connected to a power source and a pipe for flowing in and out are inserted.
The air passage chamber B is a space in which an air heat exchanger 14 that exchanges heat between the refrigerant and outdoor air and a blower fan 15 that blows outdoor air to the air heat exchanger 14 are provided. Pass through space.

  The configuration of the machine room A will be described. In the machine room A, a first water heat exchanger case 17 for housing the first water heat exchanger 16 is attached on the bottom plate 2 which is the bottom of the machine room A. In the first water heat exchanger 16, the high-temperature refrigerant compressed by the compressor 12 and the low-temperature water flowing from the outside exchange heat, and this water is heated. The compressor 12 is provided on the first water heat exchanger case 17 and is fixed to the upper surface of the first water heat exchanger case 17. An accumulator 18 is provided in the suction portion for sucking the refrigerant of the compressor 12, and the liquid refrigerant and the gas refrigerant are separated by the accumulator 18, and the compressor 12 sucks the gas refrigerant. A control board 13 is provided in the upper part of the machine room A, and the control board 13 is provided on a board mounting plate 19. The substrate mounting plate 19 is fixed to at least one of the top plate 9, the partition plate 10, and the side plate 6. The partition plate 10 also serves as a sound insulation plate for insulating the noise of the compressor 12.

  The air passage chamber B will be described. In the air passage chamber B, a second water heat exchanger case 22 for housing the second water heat exchanger 21 is attached to the bottom plate 2 which is the bottom of the air passage chamber B. A blower fan support member 20 that supports the blower fan 15 is fixed to the upper surface of the second water heat exchanger case 22. The blower fan support member 20 is provided from the upper surface of the second water heat exchanger case 22 to the top plate 9, the lower end thereof is fixed by the second water heat exchanger case 22, and the upper end thereof is the top plate 9. It is fixed.

  The air heat exchanger 14 is a plate-like body that is formed of heat transfer tubes, fins, and the like through which a refrigerant flows. The air heat exchanger 14 is erected from the side panel 5 side end of the bottom plate 2 to the back side along the periphery. That is, it is erected along the side from the front side to the back side of the one side end on the rectangular bottom plate 2, and then bent substantially 90 degrees and continuously along the rear side on the back side of the rear end. Established. Note that the air heat exchanger 14 is provided at the rear end portion to the vicinity of the rear side end portion of the partition plate 10.

  The control board 13 is provided with a converter that converts an alternating current supplied from the outside into a direct current and an inverter that converts the direct current into an alternating current of an arbitrary frequency. The alternating current converted by the control board 13 is supplied to the motors of the compressor 12 and the blower fan 15.

  The blower fan 15 is a propeller fan in which a plurality of propellers arranged radially about the rotation axis rotate to blow air, and these propellers face the air heat exchanger 14 and the circular opening of the front panel 4. Yes. When the blower fan 15 is driven to rotate, outdoor air is sucked through the air heat exchanger 14 and discharged from the opening of the front panel 4. At that time, the outdoor air exchanges heat with the refrigerant flowing through the air heat exchanger 14.

  In the first embodiment, the height of the outdoor unit 100 is L. Further, the propeller diameter Le of the blower fan 15 is set, and the height of the compressor 12 is set to Lf. The relationship between these heights is Le> Lf. Moreover, the height of the 1st water heat exchanger 16 is set to La, and the height of the 2nd water heat exchanger 21 is set to Lb. Their relationship is La> Lb. Further, the longitudinal width of the first water heat exchanger 16 is Lc, and the longitudinal width of the second water heat exchanger 21 is Ld. The relationship between these widths is Ld> Lc. The height La is substantially equal to the height of the first water heat exchanger case 17 and the height Lb is substantially equal to the height of the second water heat exchanger case 22. Similarly, the width Lc is substantially equal to the width of the first water heat exchanger case 17, and the width Ld is substantially equal to the width of the second water heat exchanger case 22.

  Note that the height Lf of the compressor 12 means that when the discharge pipe connected to the refrigerant discharge port of the compressor 12 is connected to the upper part of the compressor 12 and the discharge pipe is at a position higher than the compressor 12. The height Lf may include the top of the discharge pipe from the bottom surface of the compressor 12.

  As described above, the outdoor unit 100 according to the first embodiment divides the water heat exchanger 23 into the first water heat exchanger 16 and the second water heat exchanger 21 in the machine room A and the air channel room B. Since it is set as the structure to provide, according to the height of the compressor 12 or the ventilation fan 15, and the width | variety of the 1st water heat exchanger 16 and the 2nd water heat exchanger 21, the 1st water heat exchanger 16 and the 2nd The height of the water heat exchanger 21 can be designed, and the outdoor unit 100 can be reduced in size.

  In particular, the height Lf of the compressor 12 is smaller than the diameter Le of the blower fan 15, or the longitudinal width of the first hydrothermal exchanger 16 is smaller than the longitudinal width of the second hydrothermal exchanger 21. In the case, if the height La of the first water heat exchanger 16 is larger than the height Lb of the second water heat exchanger 21, the space of the machine room A can be used more efficiently. The outdoor unit 100 can be reduced in size. Furthermore, by increasing the height La of the first water heat exchanger 16, it is possible to increase the area where the refrigerant and the water can exchange heat, thereby improving the heat exchange efficiency.

Next, the flow of the refrigerant and water will be described.
The water heat exchanger 23 is provided with a pipe through which water flows and a pipe through which refrigerant flows while contacting the outer periphery of the pipe, and the pipe through which the refrigerant flows is spirally wound around the pipe through which water flows. In addition, the flow of the refrigerant is opposite to the flow of water.

  Arrows F1, F2, and F3 shown in FIG. 3 represent the flow of water. In the first embodiment, the water flowing through the water heat exchanger 23 is configured to flow through the second water heat exchanger 21 after flowing through the first water heat exchanger 16 first.

  Further, in general, in a condenser, a high-temperature refrigerant gives thermal energy of low-temperature water, so that the refrigerant changes from a gas to a liquid as it flows through a pipe. Since the liquefied refrigerant tends to flow downward due to gravity, it is desirable that the refrigerant flows from the upper side to the lower side in the condenser. Further, the heat exchange efficiency is improved when the refrigerant flow is a counter flow rather than a parallel flow with respect to the water flow. Therefore, in the condenser, it is desirable that the water flows from the bottom to the top.

  Therefore, in the first embodiment, in the water heat exchanger 23, water flows from the bottom to the top in the first water heat exchanger 16 and the second water heat exchanger 21, and the refrigerant flows from the top to the bottom. The configuration. That is, if it demonstrates based on the flow of water, water will first flow in from the inflow port provided in the lower part of the 1st water heat exchanger 16 (arrow F1). The water flowing into the first water heat exchanger 16 flows from the bottom to the top in the first water heat exchanger 16. And it flows from the outflow port provided in the upper part of the 1st water heat exchanger 16 to the inflow port provided in the lower part of the 2nd water heat exchanger 21 (arrow F2). The water that has flowed into the second water heat exchanger 21 flows in the second water heat exchanger 21 from the bottom to the top. And it flows out from the outflow port provided in the upper part of the 2nd water heat exchanger 21 (arrow F3), and is supplied to the load side for users, such as a hot water storage tank and a bath.

Thus, by flowing water from the upper part of the first water heat exchanger 16 to the lower part of the second water heat exchanger 16, the potential energy of the water in the upper part of the first water heat exchanger 16 is changed to the first. It can utilize for the kinetic energy of the water which flows from the water heat exchanger 16 to the 2nd water heat exchanger 21, and can flow water efficiently. In particular, when the first water heat exchanger 16 having a height higher than that of the second water heat exchanger 21 is used to flow water first, then the second water heat exchanger 21 is configured to cause water to flow. .
On the contrary, when water flows from the second water heat exchanger 21 to the first water heat exchanger 16, the water pressure is reduced at the outlet of the second water heat exchanger 21, and the first water heat exchanger 16 In order to allow water to flow to the top, the water pressure of the water flowing into the second water heat exchanger 21 must be increased, and the pressure loss of the water flowing inside the second water heat exchanger 21 becomes large and the efficiency becomes poor. There is.

  Next, the flow of the refrigerant will be described. Since the flow of the refrigerant is opposite to that of water, it is basically the reverse of the flow of water. First, the refrigerant discharged from the compressor 12 flows into the second water heat exchanger 21 from the upper part of the second water heat exchanger 21 and flows from the top to the bottom in the second water heat exchanger 21. And it flows from the lower part of the second water heat exchanger 21 to the upper part of the first water heat exchanger 16. The refrigerant that has flowed into the first water heat exchanger 16 flows in the first water heat exchanger 16 from top to bottom. And it flows out from the lower part of the 1st water heat exchanger 16, flows into the decompression mechanism (not shown) which decompresses a refrigerant | coolant, the air heat exchanger 14, etc., and circulates a refrigerating cycle.

  In summary, the water is (lower part of the first water heat exchanger 16) → (upper part of the first water heat exchanger 16) → (lower part of the second water heat exchanger 21) → (second water heat exchanger 21). The upper part of the refrigerant flows in the order (the upper part of the second water heat exchanger 21) → (the lower part of the second water heat exchanger 21) → (the upper part of the first water heat exchanger 16) → ( It flows in the order of the first water heat exchanger 16 lower part).

  Thus, water flows from the first water heat exchanger 16 to the second water heat exchanger 21, and the refrigerant flows from the second water heat exchanger 21 to the first water heat exchanger 16. The temperature of water rises from the lower part of the first water heat exchanger 16 to the upper part of the second water heat exchanger 21, and conversely, the refrigerant moves from the upper part of the second water heat exchanger 21 to the lower part of the first water heat exchanger 16. The temperature decreases over time. The ratio of the refrigerant that is liquefied in the first water heat exchanger 16 is higher than that in the second water heat exchanger 21, and almost all the refrigerant is liquefied in the lower part of the first water heat exchanger 16. ing. That is, at the refrigerant outlet of the second water heat exchanger 21 and the refrigerant outlet of the first water heat exchanger 16, the refrigerant outlet of the second water heat exchanger 21 has less liquid refrigerant and the gaseous refrigerant still remains. ing.

  As described above, in the outdoor unit 100 of the first embodiment, the refrigerant flowing out from the lower part of the second hydrothermal exchanger 21 is caused to flow to the upper part of the first hydrothermal exchanger 16, thereby increasing the buoyancy of the gaseous refrigerant. The refrigerant is raised from the lower portion of the second water heat exchanger 21 to the upper portion of the first water heat exchanger 16, and the refrigerant liquefied by the first water heat exchanger 16 is the first water using gravity. Since it flows to the heat exchanger 16 lower part, a refrigerant | coolant can be efficiently flowed and the load concerning the compressor 12 can be reduced.

  If the water is (second water heat exchanger 21 lower) → (second water heat exchanger 21 upper) → (first water heat exchanger 16 lower) → (first water heat exchanger 16) (Upper part of the first water heat exchanger 16) → (lower part of the first water heat exchanger 16) → (upper part of the second water heat exchanger 21) → (second water heat) When flowing in the order of the lower part of the exchanger 21), the refrigerant flowing in the first hydrothermal exchanger 16 has a high gas ratio, and an upward force is exerted on the gaseous refrigerant by buoyancy. Pressure loss that occurs during the flow from the upper part of the first water heat exchanger 16 to the lower part of the first water heat exchanger 16 and the pressure loss that occurs while the second water heat exchanger 21 flows to the lower part of the second water heat exchanger 21 It will be bigger than that.

  In addition, it is good also as a structure which isolate | separates the refrigerant | coolant which flows out from the lower part of the 2nd water heat exchanger 21 into a liquid refrigerant and a gaseous refrigerant, and flows only a gaseous refrigerant to the 1st hydraulic heat exchanger 16 upper part. In this case, a bypass pipe through which the liquid refrigerant flows from the lower part of the second water heat exchanger 21 to the lower part of the first water heat exchanger 16 is provided. By adopting such a configuration, it is possible to eliminate the energy loss by raising the liquid refrigerant to the upper part of the first water heat exchanger 16, and the load on the compressor 12 can be further reduced.

Embodiment 2. FIG.
In the first embodiment, the configuration of the outdoor unit 100 of the heat pump water heater when the first water heat exchanger 16 is higher than the second water heat exchanger 21 has been described. Then, the outdoor unit 200 (hereinafter referred to as the outdoor unit 200) of the heat pump water heater in which the second water heat exchanger 27 is larger than the first water heat exchanger 25 will be described. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The internal structure of the outdoor unit 200 will be described with reference to FIGS. 4 and 5. 4 is a top view of the outdoor unit 200 with the top plate 9 removed, and FIG. 5 is a front view of the outdoor unit 200 with the top plate 9 and the front plate 3 removed. 5 is the longitudinal direction of the outdoor unit 200, the vertical direction is the height direction of the outdoor unit 200, and the vertical direction in FIG. 4 is the depth direction of the outdoor unit 200.

  In the outdoor unit 200 according to the second embodiment, the first water heat exchanger 25 is provided in the machine room A and the second water heat exchanger 27 is provided in the air passage chamber B in the same manner as the outdoor unit 100 in the first embodiment. Although each has a configuration, the height Lg of the first water heat exchanger 25 is smaller than the height Lh of the second water heat exchanger 27.

  The first water heat exchanger 25 is housed in a first water heat exchanger case 26, and the second water heat exchanger 27 is housed in a second water heat exchanger case 28. The bottom portions of the first water heat exchanger case 26 and the second water heat exchanger case 28 are fixed to the bottom plate 2. The compressor 24 is provided on the first water heat exchanger case 26, and is fixed to the upper surface of the first water heat exchanger case 26.

  In the second embodiment, a water heat exchanger 29 is composed of the first water heat exchanger 25 and the second water heat exchanger 27. Further, the height Li of the compressor 24 is larger than the diameter Le of the blower fan 15.

  In the second embodiment, when the height Li of the compressor 24 is larger than the diameter Le of the blower fan 15, the height Lg of the first water heat exchanger 25 is the height of the second water heat exchanger 27. The outdoor unit 200 configured to be smaller than the length Lh has been described. However, the reason why Lg is smaller than Lh is not limited to the configuration in which Li is larger than Le. Even when the height of the compressor 24 is smaller than the diameter of the blower fan 15, for example, the machine room A When the control board 13 attached to the upper part of the machine is enlarged, or when the compressor 24 must be arranged within a predetermined height of the machine room A due to the arrangement of the refrigerant, the first water heat exchange is performed. The height Lg of the vessel 25 must be reduced. In such a case, the heat exchange performance of the water heat exchanger 29 is maintained by increasing the height Lh of the second water heat exchanger 27 as much as the first water heat exchanger 25 is downsized. be able to.

The flow of water and refrigerant in the water heat exchanger 29 of the outdoor unit 200 will be described. As in the first embodiment, in the first water heat exchanger 25 and the second water heat exchanger 27, it is desirable that water flows from below to above and that the refrigerant flows from above to below.
Therefore, in the outdoor unit 200, water first flows in from the inlet provided in the lower part of the second hydrothermal exchanger 27 (arrow F4). The water that has flowed into the second water heat exchanger 27 flows in the second water heat exchanger 27 from the bottom to the top. And it flows from the outflow port provided in the upper part of the 2nd water heat exchanger 27 to the inflow port provided in the lower part of the 1st water heat exchanger 25 (arrow F5). The water that has flowed into the first water heat exchanger 25 flows from the bottom to the top in the first water heat exchanger 25. And it flows out from the outflow port provided in the upper part of the 2nd water heat exchanger 21 (arrow F6), and is supplied to load sides, such as a hot water storage tank and a bath.

  In summary, the water is (lower part of second water heat exchanger 27) → (upper part of second water heat exchanger 27) → (lower part of first water heat exchanger 25) → (first water heat exchanger 25). The refrigerant that flows in the order of (upper part) is (the upper part of the first water heat exchanger 25) → (lower part of the first water heat exchanger 25) → (upper part of the second water heat exchanger 27) → ( It is set as the structure which flows in order of the 2nd water heat exchanger 27 lower part.

  In particular, the ratio of the refrigerant liquefied in the second water heat exchanger 27 is higher than that in the first water heat exchanger 25, and almost all the refrigerant is liquefied in the lower part of the second water heat exchanger 27. is doing. At the refrigerant outlet of the first water heat exchanger 25 and the refrigerant outlet of the second water heat exchanger 27, the refrigerant outlet of the first water heat exchanger 25 has less liquid refrigerant and gas refrigerant still remains. .

  Therefore, in the outdoor unit 200, the first water heat exchanger that uses the buoyancy of the gaseous refrigerant by flowing the refrigerant flowing out from the lower part of the first water heat exchanger 25 to the upper part of the second water heat exchanger 27. 25, the refrigerant rises from the lower part to the upper part of the second water heat exchanger 27, and the refrigerant liquefied by the second water heat exchanger 27 flows to the lower part of the second water heat exchanger 27 by using gravity. The refrigerant can be flowed well, and the load on the compressor 24 can be reduced.

  In addition, it is good also as a structure which isolate | separates the refrigerant | coolant which flows out from the lower part of the 1st water heat exchanger 25 into a liquid refrigerant and a gaseous refrigerant, and flows only a gaseous refrigerant to the 2nd hydraulic heat exchanger 27 upper part. In this case, a bypass pipe is provided through which the liquid refrigerant flows from the lower portion of the first water heat exchanger 25 to the lower portion of the second water heat exchanger 27. By adopting such a configuration, it is possible to eliminate the energy loss by raising the liquid refrigerant to the upper part of the second water heat exchanger 27, and it is possible to further reduce the load applied to the compressor 24.

As described above, the outdoor unit 200 is configured so that the water heat exchanger 29 is divided into the first water heat exchanger 25 and the second water heat exchanger 27 in the machine room A and the air passage room B. Design the height of the first water heat exchanger 25 and the second water heat exchanger 27 according to the size of the compressor 24 and the blower fan 15 or the space between the machine room A and the air passage room B. The outdoor unit 200 can be downsized. In particular, when the height Li of the compressor 24 is larger than the diameter Le of the blower fan 15, the height Lg of the first water heat exchanger 25 is smaller than the height Lh of the second water heat exchanger 21. Then, the space of the machine room A can be used more efficiently, and the outdoor unit 200 can be downsized.
Further, when water is first flowed from the second water heat exchanger 27 having a height higher than that of the first water heat exchanger 25, water is allowed to flow to the first water heat exchanger 25. The potential energy of the water at the upper part of the water heat exchanger 27 can be used as the kinetic energy of the water flowing from the second water heat exchanger 27 to the first water heat exchanger 25, allowing water to flow efficiently. be able to.

Embodiment 3 FIG.
In the third embodiment, an outdoor unit 300 (hereinafter referred to as an outdoor unit 300) of a heat pump water heater in which the water heat exchanger provided in the air channel chamber B in the first and second embodiments is further divided into two heat exchangers. ). In the third embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

  The internal structure of the outdoor unit 300 will be described with reference to FIGS. 6 and 7. 6 is a top view of the outdoor unit 300 with the top plate 9 removed, and FIG. 7 is a front view of the outdoor unit 300 with the top plate 9 and the front plate 3 removed. 6 and 7 is the longitudinal direction of the outdoor unit 300, the vertical direction is the height direction of the outdoor unit 300, and the vertical direction in FIG. 6 is the depth direction of the outdoor unit 300.

  The outdoor unit 300 includes two heat exchangers, a second water heat exchanger 32 and a third water heat exchanger 34 in the air passage chamber B. The second water heat exchanger 32 is housed in a second water heat exchanger case 33, and the third water heat exchanger 34 is housed in a third water heat exchanger case 35. Further, the first water heat exchanger 30 provided in the machine room A is accommodated in a first water heat exchanger case 31. The bottom portions of the second water heat exchanger case 33, the third water heat exchanger case 35, and the first water heat exchanger case 31 are fixed to the bottom plate 2.

  The blower fan support member 36 that supports the blower fan 15 is fixed to the bottom plate 2 and the top plate 9. The second water heat exchanger 32 and the third water heat exchanger 34 are fixed on the bottom plate 2 at the bottom of the air passage chamber B, and the second water heat exchanger 32 is separated from the blower fan support member 36. Between the plates 10, the third water heat exchanger 34 is disposed between the blower fan support member 36 and the side panel 5. That is, the blower fan support member 36 is fixed to the bottom plate 2 at a position sandwiched between the second water heat exchanger case 33 and the third water heat exchanger case 35 on both the left and right sides in the longitudinal direction.

  The shape of the second water heat exchanger case 33 will be described. In the longitudinal direction of the outdoor unit 300, the width of the upper surface of the second water heat exchanger case 33 is smaller than the bottom surface. The side surface of the second water heat exchanger case 33 on the side of the partition plate 10 is arranged vertically from the end side of the upper end surface on the partition plate 10 side to the lower end surface. Further, the side surface of the second water heat exchanger case 33 on the side of the blower fan support member 36 is arranged so as to be along the outer periphery of the propeller that rotates the blower fan 15 from the end of the upper end surface on the side of the blower fan support member 36. And an inclined surface and a surface formed vertically from the lower end of the inclined surface to the bottom surface.

  The third water heat exchanger case 35 has the same shape as the second water heat exchanger 32, and the third water heat exchanger 34 has an orthogonal line drawn from the rotating shaft of the blower fan 15 to the bottom plate 2. It is arranged in line symmetry with the second water heat exchanger 32 as the center.

  The height from the bottom surface to the top surface of the second water heat exchanger case 33 is Lj, and the length from the bottom surface of the second water heat exchanger case 33 to the lower end of the inclined surface is Lk. In the third embodiment, the height of the second water heat exchanger 32 may be Lj, Lk, or may be a value obtained by dividing the volume of the second water heat exchanger 32 by the area of the bottom surface.

The flow of water and refrigerant in the outdoor unit 300 will be described. FIG. 3 illustrates a case where the heights of the second water heat exchanger 32 and the third water heat exchanger 34 are larger than the height of the first water heat exchanger 30.
In this case, water flows into the water heat exchanger from the lower part of the second water heat exchanger 32 or the third water heat exchanger 34, and the flow is as follows.
(Lower part of second water heat exchanger 32) → (upper part of second water heat exchanger 32) → (lower part of third water heat exchanger 34) → (upper part of third water heat exchanger 34) → (first 1 water heat exchanger 30 lower part) → (first water heat exchanger 30 upper part)
Or
(Lower part of second water heat exchanger 32) → (upper part of second water heat exchanger 32) → (upper part of third water heat exchanger 34) → (lower part of third water heat exchanger 34) → (first 1 water heat exchanger 30 lower part) → (first water heat exchanger 30 upper part)
That is, water flows in from the lower part of the second water heat exchanger 32 and finally flows out from the upper part of the first water heat exchanger 30. The same applies even if the order of the second water heat exchanger 32 and the third water heat exchanger 34 is changed.
Or
(Lower part of second water heat exchanger 32) → (upper part of second water heat exchanger 32) → (lower part of first water heat exchanger 30) → (upper part of first water heat exchanger 30)
(Lower part of third water heat exchanger 34) → (upper part of third water heat exchanger 34) → (lower part of first water heat exchanger 30) → (upper part of first water heat exchanger 30)
Thus, it is good also as a structure which water flows through the 2nd water heat exchanger 32 and the 3rd water heat exchanger 34 in parallel, and merges in the 1st water heat exchanger 30 lower part.

Further, the flow of water when the height of the first water heat exchanger 30 is larger than the height of the second water heat exchanger 32 and the third water heat exchanger 34 will be described.
In this case, water flows into the water heat exchanger from the lower part of the first water heat exchanger 30 and the flow is as follows.
(Lower part of first water heat exchanger 30) → (upper part of first water heat exchanger 30) → (lower part of second water heat exchanger 32) → (upper part of second water heat exchanger 32) → (first 3 lower part of the water heat exchanger 34) → (upper part of the third water heat exchanger 34).
Alternatively, the water divided as described below may flow through the second water heat exchanger 32 and the third water heat exchanger 34 in parallel.
(Lower part of first water heat exchanger 30) → (upper part of first water heat exchanger 30) → (lower part of second water heat exchanger 32) → (upper part of second water heat exchanger 32)
(1st water heat exchanger 30 lower part)-> (1st water heat exchanger 30 upper part)-> (3rd water heat exchanger 34 lower part)-> (3rd water heat exchanger 34 upper part).

In addition, the flow of the refrigerant is opposite to water as in the first and second embodiments. For example, water is (lower part of the second water heat exchanger 32) → (upper part of the second water heat exchanger 32) → (lower part of the third water heat exchanger 34) → (upper part of the third water heat exchanger 34). ) → (lower part of the first water heat exchanger 30) → (upper part of the first water heat exchanger 30)
The flow of refrigerant is the opposite,
(Upper part of first water heat exchanger 30) → (lower part of first water heat exchanger 30) → (upper part of third water heat exchanger 34) → (lower part of third water heat exchanger 34) → (first 2 upper part of water heat exchanger 32) → (lower part of second water heat exchanger 32)
It flows in the order.

  As described above, the outdoor unit 300 according to the third embodiment divides and arranges the water heat exchanger of the air passage chamber B into the second water heat exchanger 32 and the third water heat exchanger 34, Further, since the side surfaces of these heat exchangers are formed along the outer periphery of the propeller rotating the blower fan 15, the space between the propeller of the blower fan 15 and the bottom plate 2 in the air passage chamber B is effectively utilized, and the outdoor unit 300 can be reduced in size.

  Further, water flows from the lower part to the upper part of the heat exchanger having the higher height in the second water heat exchanger 32, the third water heat exchanger 34, or the first water heat exchanger 30. With the configuration, water can be flowed by effectively using the potential energy of water in the upper part. Furthermore, since the refrigerant flows from the upper part to the lower part of the heat exchanger having a higher height and flows out from the lower part of the heat exchanger, the refrigerant liquefied inside the heat exchanger easily flows downward to the compressor. The applied load can be reduced.

  INDUSTRIAL APPLICABILITY The present invention can be used for a heat pump water heater that boils hot water with a compressed high-temperature refrigerant.

DESCRIPTION OF SYMBOLS 1 Case, 2 Bottom plate, 3 Front plate, 4 Front panel, 5 Side panel, 6 Side plate, 7 Side panel, 8 Back panel, 9 Top plate, 10 Partition plate, 11 Cover, 12 Compressor, 13 Control board, DESCRIPTION OF SYMBOLS 14 Air heat exchanger, 15 Blower fan, 16 1st water heat exchanger, 17 Case for 1st water heat exchangers, 18 Accumulator, 19 Board mounting plate, 20 Blower fan support member, 21 2nd water heat exchange , 22 second water heat exchanger case, 23 water heat exchanger, 24 compressor, 25 first water heat exchanger, 26 first water heat exchanger case, 27 second water heat exchanger, 28 2nd water heat exchanger case, 29 Water heat exchanger, 30 1st water heat exchanger, 31 1st water heat exchanger case, 32 2nd water heat exchanger, 33 2nd Case for water heat exchanger, 34 Third water heat exchanger, 35 Case for third water heat exchanger, 36 Blower fan support member, 100 Outdoor unit for heat pump water heater, 200 Outdoor unit for heat pump water heater, 300 Heat pump hot water supply The outdoor unit of the machine.

Claims (7)

A housing,
A partition plate that partitions the inside of the housing into a machine room provided with a compressor and an air passage room provided with a blower fan that blows air to the air heat exchanger;
A first heat exchanger disposed below the compressor in the machine room;
A second heat exchanger provided in the air passage chamber across the first heat exchanger and the partition plate and disposed below the blower fan;
Heat pump water heater outdoor unit equipped with. In the first heat exchanger and the second heat exchanger, the refrigerant compressed by the compressor and water flowing from the outside exchange heat,
An outlet from which the water flows out is provided at the upper part of the first heat exchanger, and the water that has flowed out from the outlet flows from the inlet provided at the lower part of the second heat exchanger to the second heat. The outdoor unit of the heat pump water heater according to claim 1, wherein the outdoor unit flows into the exchanger. In the first heat exchanger and the second heat exchanger, the refrigerant compressed by the compressor and water flowing from the outside exchange heat,
An outlet from which the water flows out is provided at the upper part of the second heat exchanger, and the water that has flowed out from the outlet flows from the inlet provided at the lower part of the first heat exchanger to the first heat. The outdoor unit of the heat pump water heater according to claim 1, wherein the outdoor unit flows into the exchanger. The height of the first heat exchanger is greater than the height of the second heat exchanger;
The outdoor unit of the heat pump water heater according to claim 2, wherein the water flows into the first heat exchanger from an inlet provided at a lower portion of the first heat exchanger. The height of the second heat exchanger is greater than the height of the first heat exchanger;
The outdoor unit of the heat pump water heater according to claim 3, wherein the water flows into the second heat exchanger from an inlet provided at a lower portion of the second heat exchanger. The heat pump hot water supply according to any one of claims 2 to 5, wherein the refrigerant flows through the first heat exchanger and the second heat exchanger in a counterflow with respect to the water flow. The outdoor unit of the machine. A support body supported by the blower fan is fixed to the bottom plate,
7. The second heat exchanger according to claim 1, wherein an upper portion of the second heat exchanger has an arc shape so as to follow an outer periphery of the blower fan, and is divided and arranged on both sides of the support body. The outdoor unit of the heat pump water heater in any one.

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