JP2011220569A - Heat pump water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump water heater capable of ensuring a sufficient hot water supply capacity, saving a space of an installation place, improved in connection workability of hot water/water piping for connecting a heat pump unit and a hot water storage tank unit, connecting the hot water/water piping while keeping the same inside of a housing, and having good appearance without causing a feeling of strangeness on its appearance.SOLUTION: Housings of the heat pump unit 1 and the hot water storage tank unit 2 are vertically stacked and detachably joined to be integrated with each other. Further, an air suction hole 14 is formed on a semicylindrical face section of a housing side face to improve air suction performance.

Description

  The present invention relates to a heat pump water heater.

  Conventional heat pump water heaters generate hot water with a heat pump unit equipped with a refrigeration cycle circuit, store the generated hot water in a hot water storage tank of the hot water storage tank unit, and supply hot water to users from this hot water storage tank as necessary. The

  When the refrigeration cycle circuit and the hot water storage tank are housed in separate housings and installed separately, problems such as troublesome connection of the water piping circuit and an increase in the installation area occur. In addition, a larger space is required to eliminate the accumulation of heat exchange air discharged by the blower of the heat pump unit.

  On the other hand, the one which made the housing of the heat pump unit and the hot water storage tank unit into one and made compact was known. For example, in a heat pump water heater disclosed in Patent Document 1, a refrigeration cycle circuit and a hot water storage tank are stored side by side in a housing.

JP 2006-118766 A

However, in the above-described heat pump water heater disclosed in Patent Document 1, since the refrigeration cycle circuit and the hot water storage tank are housed side by side in the housing, the installation area required for installation is the refrigeration cycle circuit. It is not much different from the case where both the hot water storage tank and the hot water tank are housed in separate cases. In addition, the capacity of the hot water storage tank is limited in order to store the two in one housing, and the amount of hot water that can be used is smaller than that of a separate type hot water supply apparatus in which the heat pump water heater and the hot water storage tank unit are provided separately.
In addition, when a high-pressure refrigerant such as CO2 or a flammable refrigerant is used as the working refrigerant of the refrigeration cycle circuit, there is a danger of workers when repairing the failure of the refrigeration cycle circuit, and repairs are performed on site. Is difficult. Therefore, when the refrigeration cycle circuit breaks down, it is necessary to replace the entire heat pump water heater, resulting in a high repair cost.

This indication is made in order to solve the above-mentioned subject, and the object of this indication is to provide the heat pump water heater which can secure sufficient hot-water supply capacity, and can attain space saving of an installation place. .
In addition, the hot water pipe connecting the heat pump unit and the hot water storage tank unit is easy to connect and can be connected while the hot water pipe is housed inside the housing. I will provide a.

  As a means for solving the problems described above, the present disclosure includes a compressor, a condenser, an expansion valve, an evaporator, a heat pump unit that houses a refrigeration cycle circuit having a water piping circuit that exchanges heat with the refrigerant of the condenser, In a heat pump water heater comprising a hot water storage tank and a water piping circuit connected to the water piping circuit of the heat pump unit and a hot water storage tank unit that houses the water pump, the housing of the heat pump unit and the housing of the hot water storage tank unit are: It is set as the structure which has a junction part for mutually integrating.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in space efficiency and can provide the heat pump water heater which can attain space saving of an installation place.

1 is a perspective view of a heat pump water heater according to a first embodiment of the present invention. The perspective view which notches and shows a part of heat pump water heater which concerns on the 1st Embodiment of this invention. The horizontal sectional view of the heat pump unit concerning a 1st embodiment of the present invention. Schematic of the refrigeration cycle circuit and hot water piping circuit of the heat pump water heater according to the present invention. The perspective view of the heat pump water heater which concerns on the 2nd Embodiment of this invention. The horizontal sectional view of the heat pump unit which concerns on the 2nd Embodiment of this invention. The horizontal sectional view of the heat pump unit concerning a 3rd embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 (A) shows an exploded perspective view of the heat pump water heater 100 according to the first embodiment of the present invention, and FIG. 1 (B) joins the heat pump unit 1 and the hot water storage tank unit 2 together. The perspective view of a state is shown. FIG. 2 is a perspective view in which a part of the heat pump water heater 100 in an integrated state of the present invention is cut out.

As shown in FIG. 1 (A), the heat pump water heater 100 of the present invention is composed of a heat pump unit 1 and a hot water storage tank unit 2, and the heat pump unit 1 is placed on and fixed to the upper part of the hot water storage tank unit 2. Become.
Here, the horizontal cross-sectional shape of the heat pump water heater 100 is formed in a D-shape in which the front is an arc portion and the rear is a flat portion.

The heat pump unit 1 has a housing composed of a heat pump unit side plate 3 that covers the side surface, a top plate 4 that closes its upper surface and has a bell mouth 4a, and a lower lid portion 5 that closes its lower surface.
The heat pump unit side plate 3 includes a front semi-cylindrical surface portion 3a, a right-side right plane portion 3b, a left-side left plane portion 3c, and a rear-side rear plane portion 3d.

  The hot water storage tank unit 2 has a housing made of a hot water storage tank unit side plate 6 that covers the side surface, an upper lid portion 7 that closes the upper surface, and a bottom plate 8 that closes the lower surface. Here, the hot water storage tank unit side plate 6 includes a front semi-cylindrical surface portion 6a, a right-side right plane portion 6b, a left-side left plane portion 6c, and a rear-side rear plane portion 6d.

  The lower lid portion 5 of the heat pump unit 1 and the upper lid portion 7 of the hot water storage tank unit 2 are opposed surfaces when the casings are integrated.

The lower portion of the heat pump unit side plate 3 has an enlarged diameter portion 11 that is enlarged to overlap the edge portion 12 of the upper portion of the hot water tank unit side plate 6, and the heat pump unit 1 is fixed to the hot water storage tank unit 2 in the enlarged diameter portion 11. A plurality of small holes 11 a through which the bolts 13 pass are provided below the lower lid portion 5.
The semicircular cylindrical surface portion 3a and the left flat surface portion 3c of the heat pump unit side plate 3 are provided with air holes 14 for taking in outside air.

  A lower lid portion through-hole 9a is provided in the vicinity of the right flat surface portion 3b of the lower lid portion 5, and is arranged so that a hot water pipe 32a and a water pipe 33a extending from the water heat exchanger 20 penetrate as shown in FIG. Has been. A connection port body 26a is provided at the end of the hot water pipe 32a, and a connection port body 27a is provided at the end of the water pipe 33a.

  The upper lid portion 7 of the hot water storage tank unit 2 is provided with a hot water pipe 32a extending from the heat pump unit 1 and an upper lid through hole 9b for guiding the water pipe 33a into the hot water storage tank unit 2. Immediately below the upper lid through hole 9b, connecting port bodies 26b, 27b on the hot water storage tank unit side described later are provided so as to be connectable to the connecting port bodies 26a, 27a.

  Further, when the heat pump unit 1 is placed on the hot water storage tank unit 2, the edge 12 at the upper part of the hot water storage tank unit side plate 6 covers the enlarged diameter portion 11 of the heat pump unit 1. Further, a bolt hole 12 a for fastening the bolt 13 is provided in the edge portion 12 so as to overlap the small hole 11 a provided in the enlarged diameter portion 11.

  A work window 10 for connecting the connection port bodies 26a, 27a and the connection port bodies 26b, 27b is provided on the right flat surface 6b of the hot water tank unit side plate 6 so as to be freely opened and closed.

  When joining the heat pump unit 1 and the hot water storage tank unit 2, the enlarged diameter portion 11 and the edge portion 12 function as a joined portion. Specifically, the heat pump unit 1 is installed at the upper part of the hot water storage tank unit 2 so that the enlarged diameter portion 11 overlaps the edge portion 12, and the bolt 13 passes through the small hole 11a and is fastened to the bolt hole 12a. Thereby, the heat pump unit 1 and the hot water storage tank unit 2 are joined.

  Further, the work window 10 is opened, the connection ports 26a and 26b are connected in the hot water storage tank unit 2, and the connection ports 27a and 27b are connected. Thereby, the hot water pipes 32a and 32b and the water pipes 33a and 33b communicate with each other.

  Next, the internal structure of the hot water storage tank unit 2 and the heat pump unit 1 will be described with reference to FIGS.

  The lower hot water storage tank unit 2 has a cylindrical hot water storage tank 15 arranged vertically on the upper surface of the bottom plate 8.

  A water supply pipe 30 for supplying water taken from the outside of the water heater is connected to the lower portion of the hot water storage tank 15, and a hot water discharge pipe 31 for supplying hot water stored in each use place (not shown) to the upper portion. Is connected.

  Further, the other end of the hot water pipe 32b having a connection port body 26b at one end is connected to the upper part of the hot water storage tank 15, and the other end of the water pipe 33b having a connection port body 27b to one end is connected to the lower part of the hot water storage tank 15. It is connected. The connection ports 26b and 27b are disposed directly below the upper lid portion through-hole 9b of the upper lid portion 7. A circulation pump 23 is attached to the water pipe 33 b in the hot water storage tank unit 2.

  On the other hand, the upper heat pump unit 1 includes a compressor 18, a four-way valve 19, a water heat exchanger 20 that is a condenser, an expansion valve 21 that is a pressure reducing device, and an air heat exchanger 22 that is an evaporator. Contained.

FIG. 3 shows a horizontal sectional view of the heat pump unit 1.
The water heat exchanger 20 is a plate fin tube type heat exchanger formed in a flat plate shape, and the primary side heat medium (R410A, refrigerant such as CO2) and the secondary side heat medium (water, hot water) have different diameters. It passes through the tube and conducts heat with plate fins.
By using the plate fin tube type heat exchanger formed in this flat plate shape, the water heat exchanger 20 can be arranged along the inner surface of the rear plane part 3d which is a plane part of the D-shaped casing.

  The air heat exchanger 22 is arranged in a substantially J shape when viewed from the upper side of the heat pump water heater (blower 25 side). Specifically, the air heat exchanger 22 is formed along the inner surface of the semi-cylindrical surface portion 3a and the inner surface of the left flat surface portion 3c. Yes.

By arranging the air heat exchanger 22 in this way, the size of the air heat exchanger 22 can be ensured and the required capacity can be ensured.
Further, a compressor 18, an expansion valve 21, and a four-way valve 19 are disposed in the vicinity of the right side surface 3b.

  The heat pump unit 1 is lighter than the hot water storage tank unit 2, and the heat pump water heater 100 is improved in stability by disposing the heat pump unit 1 above the hot water storage tank unit 2. Moreover, it becomes possible to arrange | position the air blower 25 which sends an air to the air heat exchanger 22 in the uppermost part of the heat pump water heater 100, as shown in FIG.

  One end of the hot water pipe 32a and the water pipe 33a is connected to the water heat exchanger 20, and the connection ports 26a and 27a are provided at the other end as described above. The hot water piping 32b connected to the hot water storage tank 15 and the connection ports 26b, 27b provided at one end of the water piping 33b are connected to constitute a hot water piping circuit 38.

  The compressor 18, the four-way valve 19, the water heat exchanger 20, the expansion valve 21, and the air heat exchanger 22 are sequentially communicated via the refrigerant pipe 24 to constitute a refrigeration cycle circuit 37.

A process in which the refrigeration cycle circuit 37 and the hot water piping circuit 38 operate to perform a hot water storage operation will be described with reference to FIG.
When the compressor 18 is driven to compress and discharge the refrigerant to a high temperature and high pressure, the refrigerant is led from the four-way valve 19 to the hydrothermal exchanger 20 as indicated by solid arrows in the figure, and is condensed to release the condensation heat.

  The refrigerant expands under reduced pressure at the expansion valve 21 and evaporates in the air heat exchanger 22. At this time, the outside air sucked from the air holes 14 by driving the blower 25 is cooled by the refrigerant evaporated in the air heat exchanger 22 and discharged from the upper bell mouth 4a.

  The refrigerant is sucked into the compressor 18 from the air heat exchanger 22 through the four-way valve 19, is compressed, and circulates again in the above-described path.

  On the other hand, hot water (or water) having a reduced temperature is stored in the hot water storage tank 15 in a full state. The circulation pump 23 is driven, and the low temperature hot water in the hot water storage tank 15 circulates through the hot water piping circuit 38 as shown by a one-dot chain line arrow in the figure.

  That is, low temperature hot water is led out from the bottom of the hot water storage tank 15 through the water pipe 33 b and sucked into the circulation pump 23. The circulation pump 23 is sent to the water heat exchanger 20 through the water pipes 33a and 33b, and the heat of condensation of the refrigerant flowing through the refrigerant pipe 24 in the water heat exchanger 20 is absorbed to change to hot hot water. Hot hot water is led from the water heat exchanger 20 into the hot water storage tank 15 through the hot water pipes 32a and 32b.

The hot water storage tank 15 is provided with a temperature sensor and a control device (not shown), and a signal detected by the temperature sensor is sent to the control device. Accordingly, when all of the hot water in the hot water storage tank 15 reaches a predetermined temperature or more, the control device stops the operation of the compressor 18 and the circulation pump 23 and ends the hot water storage operation.
This hot water storage operation is performed using, for example, an inexpensive late-night electricity charge time zone.

  In the present invention, the hot water piping circuit 38 of the heat pump unit 1 and the hot water storage tank unit 2 is connected in the hot water storage tank unit 2, but may be configured in the heat pump unit 1. In this case, the work window 10 Alternatively, the heat pump unit 1 may be configured to be provided. In addition, the joining method may be other joining methods that are easy to separate and integrate rather than fastening with bolts. Moreover, the enlarged diameter part 11 which is a junction part may be provided in the upper part of the hot water tank unit side plate 6, and the edge part 12 may be provided in the lower part of the heat pump unit side plate 3.

  Further, in the present embodiment, a plate fin tube type heat exchanger is used as the water heat exchanger 20, but the primary side heat medium and the secondary side heat medium pass through a coaxial pipe having different diameters. Various water heat exchangers may be used such as a pipe structure or a pipe structure in which a primary heat medium pipe is wound around a secondary heat medium pipe.

  By using the work window 10 as in the present invention and connecting the hot water piping circuit inside the housing, the work can be easily performed, and there is no sense of incongruity in appearance, and installation with a beautiful appearance is possible.

  In addition, by providing a semi-cylindrical surface on the side surface of the housing of the heat pump water heater, it is possible to provide a heat pump water heater that is superior in space efficiency as compared to a rectangular tubular housing.

  At the time of installation, the heat pump water heater of the present embodiment is preferably installed with the flat portion at the rear of the housing attached to the wall surface of the house, but the heat pump water heater 100 of the present invention has the front surface facing the wall surface of the house. Even if it is installed without a gap, since the air holes 14 are provided in the semi-cylindrical surface portion 3a of the semi-cylinder, it is possible to secure a space for taking in outside air, and to suppress a decrease in heat exchange efficiency of the air heat exchanger 22. Can do.

  Furthermore, by adopting a configuration in which the heat pump unit 1 and the hot water storage tank unit 2 are divided and stacked to form a housing of one heat pump water heater 100, for example, even if repair is necessary, replacement for each unit is possible. Therefore, the stop time of the heat pump water heater due to the repair can be shortened and repaired at a lower cost. Further, depending on the type of the primary side heat medium circulating in the refrigeration cycle circuit 37 of the heat pump unit 1 (for example, CO 2), it may be difficult to repair at the installation site, so the heat pump unit 1 and the hot water storage tank unit 2 It becomes possible to repair by dividing and replacing the heat pump unit 1.

  Moreover, since it is unitized for every role of the heat pump water heater, it becomes possible to freely combine necessary units. For example, a plurality of types of hot water storage units 15 can be prepared in accordance with the capacity of the hot water storage tank 15 in the hot water storage tank unit 2. In this case, the vertical heights of the hot water storage tank 15 and the hot water storage tank unit 2 are changed according to the capacity of the hot water storage tank 15. Therefore, it is possible to provide a heat pump water heater that can increase the variations of the hot water storage tank unit 2 and respond finely to the request for the hot water storage amount.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. Note that the description of the same configuration as that of the first embodiment described above is omitted.
As a difference from the first embodiment, the horizontal cross section of the housing of the heat pump unit 1 and the hot water storage tank unit 2 of the present embodiment is formed in a substantially fan shape with the arc portion 41 at the front and the right angle portion 42 at the rear. ing.
Accordingly, the shape and arrangement of each device housed in the heat pump unit 1 also change. For example, the air heat exchanger 22 has a C shape along the arc portion 41, and the blower 25 is provided so as to be positioned at the center of the arc portion 41. The compressor 18, the four-way valve 19, and the expansion valve 21 are disposed on the left side of the right-angle portion 42, and the water heat exchanger 20 is disposed along a plane on the right side of the right-angle portion 42.

A hot water pipe 32a and a water pipe 33a are connected to the end face of the water heat exchanger 20 on the air heat exchanger 22 side, and a lower lid part through hole 9a is provided directly below the hot water pipe 32a.
An air hole 14 is provided in the arc portion 41 in front of the heat pump unit side plate 3.

  Furthermore, the heat pump water heater 100 according to the present embodiment has the work structure 10 for performing the connection work with the refrigeration cycle circuit 37 and the hot water piping circuit 38 similar to the first embodiment in the above-described configuration. And function in the same manner as in the first embodiment.

  The heat pump water heater 100 according to the present embodiment is preferably installed by attaching at least one of the right and left planes of the right angle portion 42 to the wall surface of the house, and in particular, the right angle portion 42 is provided on the corner wall surface in the site of the house. It is preferable to install and install. By installing in this way, more stable installation than in the first embodiment is possible.

(Third embodiment)
Next, a third embodiment will be described. Note that the description of the same configuration as that of the first embodiment described above is omitted.
As a difference between the present embodiment and the first and second embodiments, the housing side surface of the heat pump water heater 100 of the present embodiment is formed in a cylindrical shape.
Accordingly, the arrangement of each device housed in the heat pump unit 1 also changes.

  FIG. 7 shows a horizontal sectional view of the heat pump unit 1. The air heat exchanger 22 is arranged in a substantially C shape along the inner surface of the heat pump unit side plate 3, and the compressor 18, the water heat exchanger 20 and the expansion valve 21 are arranged between both ends of the air heat exchanger 22. .

  An air hole 14 is provided in the heat pump unit side plate 3 so as to cover the C-shaped air heat exchanger 22.

  The heat pump water heater 100 in the present embodiment has the same structure as in the first embodiment, the working window 10 for connecting the refrigeration cycle circuit 37 and the hot water piping circuit 38 in the above-described configuration. This functions similarly to the first embodiment.

  By adopting the above-described form, the heat pump water heater 100 according to the present embodiment is provided with the air holes 14 in the cylindrical surface portion even when the front, rear, left and right are surrounded by the wall surface of the house and obstacles. A space for entering can be secured, and a decrease in heat exchange efficiency of the air heat exchanger 22 can be suppressed.

  In addition to the first to third embodiments described above, the horizontal sections of the housings of the heat pump unit 1 and the hot water storage tank unit 2 may be formed in a polygonal shape, and the housings may be joined together.

  Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

  1 ... Heat pump unit, 2 ... Hot water storage tank unit, 3 ... Heat pump unit side plate, 3a ... Semi-cylindrical surface part, 3b ... Right plane part, 3c ... Left plane part, 3d ... Rear plane part, 4 ... Top plate, 4a ... Bellmouth 5 ... Lower lid part, 6 ... Hot water storage tank unit side plate, 6a ... Semi-cylindrical surface part, 6b ... Right plane part, 6c ... Left plane part, 6d ... Rear plane part, 7 ... Upper lid part, 8 ... Bottom plate, 9a ... Bottom Cover part through hole, 9b ... Upper cover part through hole, 10 ... Work window, 11 ... Expanded part, 11a ... Small hole, 12 ... Edge part, 12a ... Bolt hole, 13 ... Bolt, 14 ... Air hole, 15 ... Hot water storage tank, 18 ... compressor, 19 ... four-way valve, 20 ... water heat exchanger, 21 ... expansion valve, 22 ... air heat exchanger, 23 ... circulation pump, 24 ... refrigerant piping, 25 ... blower, 26a ... connection port Body, 26b ... Connection port body, 27a ... Connection port body, 27b ... Connection port body, 30 ... Water supply pipe, 31 ... Hot water pipe, 32 ... Hot water pipe, 33 ... Water pipe, 37 ... Refrigeration cycle circuit, 38 ... Hot water pipe Circuit, 41 ... arc part 42 ... right-angled portions, 100 ... heat pump water heater

Claims (7)

In the housing, a compressor, a condenser, an expansion valve, a refrigeration cycle circuit having an evaporator, a heat pump unit that houses a water piping circuit that exchanges heat with the refrigerant of the condenser, a hot water storage tank, and the heat pump unit In a heat pump water heater comprising a water storage tank unit that houses a water piping circuit connected to the water piping circuit and a water pump,
The housing of the heat pump unit and the housing of the hot water storage tank unit have a joint portion that is joined to each other.   The opposed surfaces of the housing of the heat pump unit and the housing of the hot water tank unit are opposed to a water piping circuit housed in the housing of the hot water tank unit, and a water piping circuit housed in the housing of the heat pump unit. The heat pump water heater according to claim 1, further comprising a through-hole for connecting the two.   3. The heat pump hot water supply according to claim 1, wherein a window for connecting the water piping circuit is provided in at least one of the casing of the hot water storage tank unit and the casing of the heat pump unit. Machine.   The heat pump water heater according to any one of claims 1 to 3, wherein the heat pump unit is disposed at an upper portion and the hot water storage tank unit is disposed at a lower portion.   The heat pump water heater according to claim 4, wherein side surfaces of the housing of the heat pump unit and the housing of the hot water storage tank unit have semicylindrical side surfaces.   The heat pump water heater according to claim 5, wherein a horizontal cross section of the housing of the heat pump unit and the housing of the hot water storage tank unit is formed in a D shape.   The heat pump water heater according to claim 5, wherein a horizontal cross section of the housing of the heat pump unit and the housing of the hot water storage tank unit is formed in a fan shape.

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