JP4997782B2 - Heat pump heat storage device - Google Patents

Description

  The present invention relates to a heat pump heat storage device used for hot water supply and heating.

  Conventionally, this type of heat pump heat storage device houses a heat pump circuit and a round heat storage tank connected to a radiator of the heat pump circuit in one housing. At this time, by omitting the connection piping work between the heat pump circuit and the heat storage tank at the construction site, an integrated heat pump water heater with excellent workability was configured for the device that separated the heat pump circuit and the heat storage tank. (For example, refer nonpatent literature 1).

  FIG. 10 shows a conventional heat pump heat storage device described in Non-Patent Document 1.

As shown in FIG. 10, the compressor 1, the radiator 2, the throttling means 3, and the evaporator 4 are connected in order, and the heat pump circuit 5, the round heat storage tank 6, and the housing 7 are configured. ing.
"Proceedings of the 2005 Annual Conference of the Japan Society of Refrigerating and Air Conditioning Engineers" October 23, 2005 C204-1-4

  However, in the conventional configuration, the depth dimension of the apparatus cannot be made smaller than the diameter of the round heat storage tank, so that the depth dimension of the apparatus is increased and the round heat storage tank is accommodated in the housing. However, a wasteful space is generated in the corner portion of the device, the size of the entire device is increased, and it is difficult to install in a housing location condition such as a narrow land, and the installation property is poor.

  The present invention solves the above-described conventional problems. In a configuration in which a heat pump circuit and a heat storage tank are housed in a single casing, the depth dimension of the device is reduced, wasteful space is reduced, and the device is small and thin. The purpose is to provide.

In order to solve the conventional problems, a heat pump heat storage device of the present invention includes a heat pump circuit having a compressor, a radiator, a throttle means, and an evaporator, and a heat storage unit connected to the radiator and having at least approximately a corner portion. And a housing having a substantially corner portion that is substantially similar to the corner portion of the heat storage portion, and the heat pump circuit and the heat storage portion are connected to the corner portion of the heat storage portion and the corner portion of the housing. The heat storage part is a reinforcing plate obtained by bonding and laminating corrugated plates and flat plates, and is formed by the corrugated plates and the flat plates of the reinforcing plate. A latent heat storage agent is provided in the space, and warm water is allowed to flow through a gap between the corrugated plate, the flat plate, and the latent heat storage agent. An approximate corner of the heat storage and an approximate corner of the housing By facing each other, compared to the diameter of a round heat storage tank of the same internal volume, Would reduce the wasted space that occurs such as greatly reduced corner portions themselves, it can be further downsized device with improved heat storage capability.

  The heat pump heat storage device of the present invention realizes a small and thin device with excellent workability and installability that can be installed in residential location conditions such as narrow land by housing the heat pump circuit and the heat storage part in one housing. can do.

A first invention includes a heat pump circuit having a compressor, a radiator, a throttle means, and an evaporator, a heat storage unit connected to the radiator and having at least a substantially corner portion, and substantially similar to a substantially corner portion of the heat storage portion. A housing having a substantially corner portion of the shape, and the heat pump circuit and the heat storage portion are disposed in the housing such that the corner portion of the heat storage portion and the corner portion of the housing face each other. The heat storage part is a reinforcing plate obtained by bonding and laminating corrugated plates and flat plates, and a latent heat storage agent is provided in all the spaces formed by the corrugated plates and the flat plates of the reinforcing plates, and the corrugated plates And the flat plate and the latent heat storage agent are configured to allow warm water to flow, and a substantially corner portion of the heat storage portion and a substantially corner portion of the housing are opposed to each other, so that a useless space inside the apparatus is saved. It will be reduced to reduce the thickness of the heat storage unit, further accumulation of heat compared to square the apparatus for heat storage water It can be miniaturized greatly entire device and.

The second invention is provided with a heat insulator that insulates the heat storage unit and the heat radiator of the first invention in an integrated manner, and reduces the amount of heat dissipated from the heat storage unit and the heat radiator. Less efficient heat storage operation can be performed.

The third invention is provided with an internal heat exchanger for exchanging heat between the high-pressure side and the low-pressure side of the heat pump circuit of the first invention, and is provided with a heat insulator that integrally insulates the heat storage section and the internal heat exchanger. Therefore, the amount of heat radiated from the heat storage unit and the internal heat exchanger is reduced, and a highly efficient heat storage operation with less heat loss can be performed.

The fourth invention is provided with a vacuum heat insulating material that covers the periphery of the heat storage unit of the first invention in particular, and the amount of heat radiated from the heat storage unit with a thin high-performance heat insulating material without bending the heat insulating agent. Therefore, the apparatus can be reduced in size without degrading the performance of the vacuum heat insulating material.

In the fifth aspect of the invention, in particular, the heat storage part is disposed at the bottom of the casing of any one of the first to fourth aspects of the invention. The center of gravity of the apparatus is set at a low position, and the depth dimension is small and thin. Even in the shape of the device, it is possible to prevent the overturn and to install stably.

The sixth aspect of the invention is a configuration in which the evaporator flow passage of the evaporator is formed by the evaporator and the heat storage part of the first to fifth aspects of the invention, and the occupied space of the evaporator and the wind circuit is reduced. Thus, the device can be miniaturized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a configuration diagram of a heat pump heat storage device according to the first embodiment of the present invention.

In FIG. 1, a compressor 1, a radiator 2, a throttle means 3, and an evaporator 4 provided with a blower fan 8 are connected in order and connected to the radiator 2 through a circulation pump 9. The substantially square heat storage unit 6 is configured to be housed in a single rectangular housing 7 so that the substantially corner portion of the heat storage unit 6 and the substantially corner portion of the housing 7 face each other. In addition, the substantially corner | angular part of the thermal storage part 6 and the substantially corner | angular part of the housing | casing 7 have a substantially similar shape.

  About the heat pump thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, in the heat storage operation, the compressor 1 of the heat pump circuit 5 is operated to circulate the refrigerant, and the refrigerant that has been reduced to low pressure and low temperature by the throttle means 3 is flowed to the evaporator 4, so that the air sent from the blower fan 8 is used. Absorbs heat. In the radiator 2, the heat obtained by the evaporator 4 is transmitted to the stored water in the heat storage unit 6 circulated by the circulation pump 9 and stored in the heat storage unit 6. On the other hand, in heat radiation operation such as hot water supply, hot water is supplied from the upper outlet by supplying tap water to the lower inlet of the heat storage unit 6.

  At this time, the heat pump circuit 5 and the heat storage section 6 are housed in a single housing 7 to minimize the useless space generated at the corners of the apparatus and the like compared to the diameter of the round heat storage tank. The depth of the apparatus can be reduced by reducing the thickness of the heat storage unit 6.

  As described above, in the present embodiment, the thickness of the heat storage unit 6 is reduced, and the useless space in the housing 7 is reduced. An excellent small and thin integrated heat pump heat storage device can be realized.

(Embodiment 2)
FIG. 2 shows a configuration diagram of the heat pump heat storage device according to the second embodiment of the present invention.

  In FIG. 2, the heat storage unit 6 includes a plurality of reinforcing plates 12 in which corrugated plates 10 and flat plates 11 are bonded and laminated.

  About the heat pump thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the heat storage unit 6 is provided with a plurality of reinforcing plates 12 in which copper or stainless steel corrugated plates 10 and flat plates 11 are joined by a process such as brazing at the contact surface, and are provided inside, and further, individual reinforcements are provided. By joining the contact portion between the plate 12 and the inner wall of the heat storage portion 6 by a process such as brazing, even when the pressure in the tank rises, deformation can be reduced and damage can be prevented.

  As described above, in the present embodiment, by joining a plurality of reinforcing plates 12 inside the heat storage unit 6 and stacking a plurality of sheets, the pressure resistance is improved, and the miniaturized structure that can reduce the size of the device. Can also be used by directly connecting water supply with high water supply pressure.

(Embodiment 3)
FIG. 3 is a block diagram of a heat pump heat storage device according to the third embodiment of the present invention.

  In FIG. 3, the heat storage unit 6 is configured by providing a heat storage body 14 having a latent heat storage agent in a space 13 of a reinforcing plate 12 formed by bonding and laminating a corrugated plate 10 and a flat plate 11 therein.

  About the heat pump thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, in the heat storage operation, hot water is poured so that hot water is poured from the upper part of the heat storage unit 6 to flow through the inside and radiate heat to the heat storage body 14, and then the low temperature water is discharged from the lower part and returned to a heat source such as a heat pump circuit. In the heat radiation operation, water is supplied to the lower part of the heat storage unit 6 and flows through the inside to take out the heat from the heat storage body 14 and take out hot water from the upper part for use in hot water supply or the like. It will be. At this time, by using a latent heat storage agent or the like having a larger specific heat than water as the heat storage body 14, the heat storage capacity can be improved and the apparatus can be downsized.

  As mentioned above, in this Embodiment, by setting it as the structure which has the thermal storage body 14 in the space part 13 of the reinforcement board 12 comprised by joining and laminating | stacking the corrugated sheet 10 and the flat plate 11 inside the thermal storage part 6, A small device having a large heat storage capacity and excellent pressure resistance can be realized.

(Embodiment 4)
FIG. 4 shows a configuration diagram of a heat pump heat storage device according to the fourth embodiment of the present invention.

  In FIG. 4, the heat storage unit 6 is a heat storage unit in which a plurality of metal plate-like multi-hole pipes 16 such as copper or aluminum having a plurality of holes 15 in the length direction are stacked and a latent heat storage agent is provided in one part of the holes. The body 14 is embedded.

  About the heat pump thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, at the time of heat storage operation, hot water is supplied to the upper part of the heat storage unit 6 and flows into the hole 15 of the plate-like multi-hole pipe 16 to dissipate heat to the heat storage body 14 embedded in one part of the hole 15 and lower the temperature of the lower part of the water. In the heat radiation operation, water is supplied to the lower part of the heat storage section 6 and flows into the hole 15 of the plate-like multi-hole pipe 16 to extract heat from the heat storage body 14 embedded in a part of the hole 15 to increase the temperature. The hot water is taken out from the upper part and used for hot water supply. At this time, by using a latent heat storage agent having a specific heat larger than that of water as the heat storage body 14, the heat storage capacity can be improved and the apparatus can be downsized.

  As described above, in the present embodiment, the pressure resistance and the heat storage capacity are improved by laminating a plurality of plate-like multi-hole tubes 16 and embedding the heat storage body 14 having a latent heat storage agent in one part of the hole. Can be miniaturized.

(Embodiment 5)
FIG. 5 shows a configuration diagram of a heat pump heat storage device according to the fifth embodiment of the present invention.

  In FIG. 5, the heat storage part 6, and the heat insulator 17 which thermally insulates the flat heat radiator 2 which has the water flow path 17 formed by providing the hole in the flat plate and the high temperature refrigerant flow path 18a are provided. .

  About the heat pump thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the flat radiator 2 having the water flow path 17 that circulates the water in the heat storage section 6 and the high-temperature refrigerant flow path 18a that circulates the refrigerant of the heat pump circuit is brought into contact with the heat storage section 6 on the high-temperature refrigerant flow path 18a side. For heat dissipation from the radiator 2 to the outside by preventing the heat dissipation from the high-temperature refrigerant flow path 18a, which is particularly high, by covering the outer periphery with a heat insulator 17 made of glass wool or resin molding. Can do.

  As described above, in the present embodiment, by providing the heat insulator 17 that integrally insulates the heat storage section 6 and the flat radiator 2, heat radiation to the outside is reduced, and piping space and the like are reduced. Therefore, the heat storage performance can be improved and the apparatus can be downsized.

(Embodiment 6)
FIG. 6 shows a configuration diagram of a heat pump heat storage device according to the sixth embodiment of the present invention.

  In FIG. 6, a heat insulator 17 is provided to integrally insulate the heat storage section 6 and the flat plate-like internal heat exchanger 20 having a high-temperature refrigerant flow path 18a and a low-temperature refrigerant flow path 18b formed by providing holes in the flat plate. Is configured.

  About the heat pump thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, a flat plate-shaped internal heat exchanger 20 having a high-temperature refrigerant flow path 18a and a low-temperature refrigerant flow path 18b for circulating the refrigerant of the heat pump circuit is provided so that the high-temperature refrigerant flow path 18a is in contact with the heat storage unit 6, and the outer periphery is provided. The amount of heat radiated from the internal heat exchanger 20 to the outside can be reduced by covering with a heat insulator 17 formed of glass wool or a resin molded product.

  As described above, in the present embodiment, by providing the heat insulator 17 that integrally insulates the heat storage section 6 and the plate-like internal heat exchanger 20, heat radiation to the outside is reduced, and piping space and the like are reduced. Since it can reduce, heat storage performance can be improved and an apparatus can be reduced in size.

(Embodiment 7)
FIG. 7 shows a configuration diagram of a heat pump heat storage device according to the seventh embodiment of the present invention.

  In FIG. 7, heat pump circuit components such as the compressor 1 and the evaporator 4 are arranged at the top, and the heat storage unit 6 is arranged at the bottom inside the housing 7.

  About the heat pump thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

First, by placing the heaviest heat storage unit 6 in the lower part of the casing 7, the center of gravity of the apparatus is set to a low position, and the apparatus can be stably installed while preventing overturning.
At this time, the ineffective space generated in the corner portion of the housing 7 can be greatly reduced by designing the heat storage unit 6 to have a size close to the bottom surface size of the housing 7.

  As described above, in the present embodiment, by providing the heat storage unit 6 in the lower part of the housing 7, the device can be prevented from falling in an earthquake or the like, and the device can be downsized.

(Embodiment 8)
FIG. 8 shows a block diagram of a heat pump heat storage device according to the eighth embodiment of the present invention.

  In FIG. 8, the flat vacuum heat insulating material 21 which covers the circumference | surroundings of the thermal storage part 6 is provided and comprised.

  About the heat pump thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, by covering the planar peripheral surface of the heat storage unit 6 with the flat vacuum heat insulating material 21 while maintaining the flat plate shape, it is not necessary to perform bending or the like, and the sealing degree of the vacuum heat insulating agent can be reduced. Since there is no, heat insulation construction will be performed while maintaining high heat insulation performance. At this time, the thickness of the heat insulator can be reduced by using a vacuum heat insulator as the heat insulator.

  As described above, in the present embodiment, by covering the heat storage part 6 having a planar shape with the flat vacuum heat insulating material 21, the heat storage part 6 is insulated without impairing the high heat insulating performance of the vacuum heat insulating material. Therefore, heat radiation is reduced, and the heat storage performance can be improved and the apparatus can be downsized.

(Embodiment 9)
FIG. 9 shows a configuration diagram of a heat pump heat storage device according to the ninth embodiment of the present invention.

  In FIG. 9, the opening portion of the U-shaped evaporator 22 is closed with one surface of the heat storage unit 6 to form a wind circuit, and the blower fan 8 is provided on the top of the housing 7.

  About the heat pump thermal storage apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, by operating the blower fan 8, air is sucked in from the periphery of the U-shaped evaporator 4 and discharged from the upper part of the housing 7. At this time, the bottom surface of the housing 7 and one surface of the heat storage unit 6 constitute the wall surface of the wind circuit, so that a stable air flow can be formed with a simple configuration without adding special wind circuit components. it can.

  As described above, in the present embodiment, the evaporator is processed into a U shape, and the wind circuit space and the U shape are formed by configuring the wind circuit with the bottom portion of the casing 7 and the heat storage portion 6. The volume occupied by the evaporator 22 is reduced, and the apparatus can be miniaturized.

  As described above, since the heat pump heat storage device according to the present invention enables high-efficiency heat storage operation, it is also applicable to applications such as residential heating, bathroom heating drying, clothes dryers, and industrial waste heat recovery devices. it can.

(A) Circuit diagram of heat pump heat storage device in Embodiment 1 of the present invention (b) Perspective view of the heat pump heat storage device (A) Cross-sectional view of the heat storage device according to Embodiment 2 of the present invention (A-A cross-sectional view of FIG. 2 (b)) (b) Front view of the heat storage device (A) Cross-sectional view of the heat storage device according to Embodiment 3 of the present invention (A-A cross-sectional view of FIG. 3 (b)) (b) Front view of the heat storage device (A) Cross-sectional view of the heat storage device according to Embodiment 4 of the present invention (A-A cross-sectional view of FIG. 4 (b)) (b) Front view of the heat storage device (A) Cross-sectional view of the heat storage device according to Embodiment 5 of the present invention (A-A cross-sectional view of FIG. 5 (b)) (b) Front view of the heat storage device (A) Cross-sectional view of the heat storage device in Embodiment 6 of the present invention (A-A cross-sectional view of FIG. 6 (b)) (b) Front view of the heat storage device The perspective view of the heat pump thermal storage apparatus in Embodiment 7 of this invention (A) Cross-sectional view of the heat storage device according to Embodiment 8 of the present invention (cross-sectional view taken along the line AA in FIG. 8B) (b) Front view of the heat storage device The perspective view of the heat pump thermal storage apparatus in Embodiment 8 of this invention (A) Circuit diagram of a conventional heat pump heat storage device (A-A cross-sectional view of FIG. 10B) (b) Perspective view of the heat pump heat storage device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Radiator 3 Throttling means 4 Evaporator 5 Heat pump circuit 6 Heat storage part 7 Housing | casing 8 Fan 9 Circulation pump 10 Corrugated plate 11 Flat plate 12 Reinforcement plate 13 Space part 14 Heat storage body 15 Hole 16 Flat plate multi-hole pipe 17 Water flow path 18a High-temperature refrigerant flow path 18b Low-temperature refrigerant flow path 19 Heat insulator 20 Internal heat exchanger 21 Flat vacuum heat insulating material 22 U-shaped evaporator

Claims (6)

A heat pump circuit having a compressor, a radiator, a throttle means, an evaporator, a heat storage unit connected to the radiator and having at least a substantially corner part, and a substantially corner part having a shape substantially similar to the substantially corner part of the heat storage part. The heat pump circuit and the heat storage unit are arranged in the housing such that the substantially corners of the heat storage unit and the corners of the housing face each other , A reinforcing plate obtained by bonding and laminating a corrugated plate and a flat plate, wherein a latent heat storage agent is provided in all spaces formed by the corrugated plate and the flat plate of the reinforcing plate, and the corrugated plate, the flat plate, and the latent heat are provided. A heat pump heat storage device configured to flow hot water through a gap with the heat storage agent . The heat pump heat storage device according to claim 1, further comprising a heat insulator that integrally insulates the heat storage unit and the radiator . The heat pump heat storage device according to claim 1, further comprising an internal heat exchanger for exchanging heat between the high pressure side and the low pressure side of the heat pump circuit, and provided with a heat insulator that integrally insulates the heat storage unit and the internal heat exchanger . The heat pump heat storage device according to claim 1, wherein the heat storage unit is configured to cover the periphery of the heat storage unit with a vacuum heat insulating material . The heat pump heat storage device according to any one of claims 1 to 4 , wherein the heat storage unit is arranged at the bottom of the housing . The heat pump heat storage device according to any one of claims 1 to 5 , wherein the evaporator and the heat storage unit form a ventilation passage of the evaporator .

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