JP2006084090A - Heat pump heat accumulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact heat pump heat accumulator exhibiting enhanced installation efficiency. <P>SOLUTION: This heat pump heat accumulator is provided with a refrigerant circuit for sequentially connecting a compressor 1, a heat radiating part 2, a decompression part 3 and an evaporator 4 so that a refrigerant flows therein, and a fluid passage having a heat receiving part 7 so that a heat receiving fluid flows therein; and the heat radiating part 2 and the heat receiving part 7 form a heat transmission mechanism through a heat storage part 5 having a heat storage agent, and the heat storage agent having large heat storage quantity is arranged on the heat storage part 5, and thereby it is not necessary to store all of the heat in the heat receiving fluid having small heat storage capacity such as water, and therefore, the compact heat pump heat accumulator exhibiting enhanced installation efficiency can be provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat pump heat storage device using heat pump heating means.

  Conventionally, this type of heat pump heat storage device has a large-capacity heat storage tank for storing a heat receiving fluid (for example, see Patent Document 1).

FIG. 9 shows an example of a conventional heat pump heat storage device described in Patent Document 1. As shown in FIG. 9, a heat receiving unit 7 that exchanges heat among the refrigerant circuit having the compressor 1, the heat radiating unit 2, the expansion valve 3, and the evaporator 4, the hot water storage tank 14, the circulation pump 6, and the heat radiating unit 2. And a mixing means 8 and the like.
Japanese Patent Laid-Open No. 1-225838

  However, in the conventional configuration, the heat receiving fluid heated by exchanging heat with the refrigerant heated by the heat pump heating means must be circulated by the circulation pump 6 to store heat in the hot water storage tank 14 in a necessary amount in advance. It was. Therefore, in the heat receiving fluid with a relatively small heat storage amount typified by water, the hot water storage tank 14 which is a large capacity heat storage tank and the circulation pump 6 are required. There was a problem in terms of construction.

  This invention solves the said conventional subject, and it aims at providing a compact heat pump thermal storage apparatus with good installation property.

  In order to solve the above-described conventional problems, a heat pump heat storage device of the present invention includes a refrigerant circuit in which a compressor, a heat radiating unit, a decompression unit, and an evaporator are sequentially connected, a refrigerant flows, and a heat receiving unit, The heat-dissipating part and the heat-receiving part are formed by forming a heat transfer mechanism through a heat storage part provided with a heat storage agent, and a heat storage agent having a large heat storage amount is installed in the heat storage part. By doing so, it is not necessary to store all heat in a heat receiving fluid (for example, water) having a small heat storage capacity, so that the hot water tank can be made compact and the circulation pump can be omitted. For this reason, it is possible to provide a compact heat pump heat storage device that is easy to install.

  According to the present invention, it is possible to provide a heat pump heat storage device that is easy to install and compact.

  A first invention includes a refrigerant circuit in which a compressor, a heat radiating unit, a decompression unit, and an evaporator are sequentially connected, a refrigerant flows, and a fluid circuit that has a heat receiving unit and through which a heat receiving fluid flows. A heat receiving part is formed by forming a heat transfer mechanism through a heat storage part provided with a heat storage agent, and by installing a heat storage agent having a large heat storage amount in the heat storage part, a heat receiving fluid having a small heat storage capacity (for example, Since it is not necessary to store all the heat in the water), the hot water tank can be made compact and the circulation pump can be omitted.

  In the second invention, a plurality of heat storage units are provided, and the heat storage material disposed in the heat storage unit changes from solid to liquid and from liquid to gas when the amount of heat transferred is large, and the heat storage amount is reduced. However, heat can be efficiently stored by storing heat in each of the heat storage units divided into a plurality of parts.

  In the third aspect of the invention, the heat storage section is divided and arranged in the flow direction of the refrigerant in the heat dissipation section, and heat is stored in the heat storage section stacked from the upstream side in the flow direction of the refrigerant circuit, so that the heat is efficiently stored. Can store heat.

  In the fourth aspect of the present invention, a heat insulating part is provided between the heat storage parts arranged in a divided manner, the heat transfer between the adjacent heat storage agents is eliminated, and each heat storage part is efficiently laminated while maintaining the respective temperatures. Heat storage.

  5th invention arrange | positions alternately a heating part and a heat receiving part between heat storage parts, and comprised so that heat might be transmitted sequentially, heat is taken in / out from both sides in heat storage part / heat receiving part. Therefore, heat can be exchanged efficiently.

  According to a sixth aspect of the present invention, there is provided a heat exchanging means for exchanging heat between the refrigerant that has passed through the heat radiating portion and the heat receiving fluid. When the refrigerant is not sufficiently cooled by the heat storage body, Since it can fully cool, the efficiency of a heat pump apparatus can be improved.

  In the seventh invention, the fluid circuit through which the heat receiving fluid flows is composed of a plurality of flow paths that pass through at least a part of the heat receiving portion, and the heated heat receiving fluid is used at a plurality of locations according to the respective purposes. Can be used.

  In the eighth invention, the heat storage agent is composed of a plurality of heat storage agents having different heat storage temperatures, and can extract a plurality of temperatures from the heat storage agent and heat the heat receiving fluid. It can be used efficiently.

  The ninth invention is provided with a heat receiving fluid accumulating portion that has received heat at the heat receiving portion, and since the heat receiving fluid heated in advance is stored in the accumulating portion when the heat receiving fluid is started to be used, It can be taken out at a high temperature from the start, and can be used at a target temperature.

  A tenth aspect of the invention is provided with a bypass circuit of a heat receiving part and a mixing means provided in the bypass circuit, and provided with a case for storing the refrigerant circuit, the heat storage body and the mixing means. In addition, since the outside air and the system can be shut off at the same time as the movement / installability is improved, the system can be stabilized, such as heat pump operation and heat storage / radiation in the heat storage body. Furthermore, since the entire device is downsized, the elements are arranged close to each other, so that the pipe length can be shortened and the efficiency of the system can be improved.

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

(Embodiment 1)
FIG. 1 shows a configuration diagram of a heat pump heat storage device according to Embodiment 1 of the present invention. The heat storage part 5 which arrange | positioned the thermal radiation part 2 of the refrigerant circuit, the thermal storage agent (not shown), and the heat receiving part 7 into which a heat receiving fluid flows is comprised, and the thermal storage body which performs heat transfer is arrange | positioned sequentially.

  The operation and action of the heat pump heat storage device shown in FIG. 1 will be described below. However, detailed description of well-known means (such as a heat pump cycle) that has been widely employed in the past will be omitted.

First, the refrigerant in the refrigerant circuit is heated by the compressor 1. Next, the heated refrigerant heats the heat storage agent disposed in the heat storage unit 5 in the heat radiating unit 2, and the heat is stored in the heat storage agent. And
The heat stored in the heat storage agent is dissipated to the heat receiving fluid by the heat receiving unit 7, and the heat receiving fluid receives the heat, and the mixing unit 8 mixes the low temperature heat receiving fluid to adjust to the required temperature. And used. The refrigerant that has radiated heat in the heat radiating section 2 is sent to the compressor 1 through the expansion valve 3 and the evaporator 4 that are pressure reducers as in the normal heat pump cycle.

  Here, the heat receiving fluid is water, brine for heat transport, or the like, and can be used for hot water supply, heating, drying, or the like when heated. When the heat receiving fluid is water, the pressure is reduced from the direct pressure as usual from the water supply and sent to the system, so that no circulation pump is required.

  As described above, in the present embodiment, the heat of the refrigerant is stored in the heat storage unit 5 provided with the heat storage agent, and the heat is radiated to the heat receiving fluid to be used in advance. Since it is not necessary to store heat in a heat receiving fluid having a small capacity, a conventional large can body is unnecessary.

In this embodiment, an example in which a hot water storage tank for a heat receiving fluid is not used is described. However, a case where a compact hot water storage tank is connected rather than a case where heat is usually stored only by the heat receiving fluid is also included in the spirit of the present invention. Shall. However, in that case, it is necessary to install a circulation pump for sending the heat receiving fluid from the can body to the heat storage body, but a large can body as in the prior art becomes unnecessary. Further, the heat storage agent 5 is not limited in the present invention with respect to its form, such as a large capsule, a microcapsule, or a plate. (The same applies to the following embodiments)
(Embodiment 2)
FIG. 2 is a configuration diagram of the heat pump heat storage device according to the second embodiment of the present invention. The heat storage section 5 is divided into a plurality of parts by the dividing means 9 in the flow direction of the refrigerant circuit. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In the heat storage unit 5 in which the heat storage agent divided and arranged by the dividing unit 9 is disposed, heat exchange between adjacent heat storage units 5 is reduced. As a result, heat is accumulated in the form of being sequentially stacked from the upstream side in the refrigerant flow direction in the refrigerant circuit. Moreover, since the heat exchange between adjacent heat storage agents is further reduced by using a heat insulating material for the dividing means 9, it is possible to efficiently store a necessary amount of heat while stacking.

(Embodiment 3)
FIG. 3 is a configuration diagram of the heat pump heat storage device according to the third embodiment of the present invention. A heat exchanger 10 that directly exchanges heat between the refrigerant and the heat receiving fluid is provided on the downstream side of the heat radiating unit 2 of the refrigerant circuit. The same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The refrigerant that has released heat at the heat radiating unit 2 is further cooled by the heat exchanger 10 and travels toward the expansion valve 3. For example, in a heat pump device using carbon dioxide as a refrigerant, when the temperature of the refrigerant entering the compressor 1 is high, the discharge pressure from the compressor may increase, and the efficiency may deteriorate. 10 can prevent this.

  Further, when the heat radiating unit 2 cannot sufficiently radiate heat, the efficiency of the entire system can be improved by directly exchanging heat with the heat receiving fluid.

(Embodiment 4)
FIG. 4 is a configuration diagram of the heat pump heat storage device according to the fourth embodiment of the present invention. The heat receiving part 7 is provided with a fluid flow path 11 (11a to 11c) through which a plurality of heat receiving fluids flow. The fluid flow paths 11 b and 11 c are formed by branching from the middle of the flow path of the heat receiving unit 7. However, the fluid flow path includes the mixing means 8 for each flow path. (Depending on the intended use of the heat receiving fluid, the mixing means 8 may not be necessary.) The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted.

  For example, the fluid channel 1 (11a) is used for hot water supply, the fluid channel 2 (11b) is used for heating, and the fluid channel 3 (11c) is used for bathroom drying. Can be used against. Also, different heat receiving fluids can be used for each purpose, and the distance and position of the heat receiving section 7 in each fluid flow path are changed, that is, branched from the flow path of the heat receiving fluid in the heat receiving section 7. Moreover, since the heat can be taken out at a temperature suitable for the purpose by making the branch positions different, the heat can be used efficiently.

  Furthermore, as described in the second embodiment, the heat storage unit 5 is divided and disposed, and the heat storage agents having different heat storage temperatures are disposed therein, whereby heat can be extracted more efficiently at the target temperature.

  Here, the number and purpose of use of the fluid flow path, the type and number of the heat receiving fluid corresponding thereto, the position of the inlet and outlet of the heat storage body, and the like are not limited in the present invention.

(Embodiment 5)
FIG. 5 is a configuration diagram of the heat pump heat storage device according to the fifth embodiment of the present invention. It is set as the structure which arrange | positioned alternately the thermal radiation part 2 and the heat receiving part 7 between the thermal storage parts 5 which consist of multiple rows | lines, and formed the thermal storage body. The same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Thereby, heat can be efficiently exchanged by putting heat in and out from both sides of the heat storage unit 5 and the heat receiving unit 7. Moreover, by enclosing heat storage agents having different heat storage temperatures in the heat storage unit 5, the heat extraction temperature can be changed, and heat can be extracted at a temperature suited to the purpose.

  Here, the number of rows of the heat radiating unit 2, the heat storage unit 5, and the heat receiving unit 7, the position of the entrance / exit of the refrigerant / cooling circuit, and the like are not limited in the present invention.

(Embodiment 6)
FIG. 6 is a configuration diagram of the heat pump heat storage device according to the sixth embodiment of the present invention. Between the heat receiving part 7 and the mixing means 8, a liquid reservoir 12 that is a storage part of the heat receiving fluid heated by the heat receiving part 7 is provided. The same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  When the heat receiving fluid is not flowing, the liquid reservoir 12 stores the heat receiving fluid heated by the heat receiving unit 7 during the previous heat pump operation. Therefore, when the heat receiving fluid is started to be used, the heat receiving fluid that has been preheated and stored in the liquid reservoir 12 is used first, so that it can be taken out at a high temperature from the start of use, and the heat receiving fluid can be obtained at the target temperature. Can be used.

  Further, as shown in FIG. 7, the liquid reservoir 12 can be formed integrally with the heat receiving portion 7. Thereby, even when the temperature of the heat receiving fluid stored in the liquid reservoir 12 is lowered, it can be reheated.

(Embodiment 7)
FIG. 8 is a configuration diagram of the heat pump heat storage device according to the seventh embodiment of the present invention. A case 13 for housing the refrigerant circuit, the heat storage body, and the mixing means 8 is provided. The same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As a result, it is possible to stabilize the heat storage system as well as the heat pump system because the system can be shut off from the outside air and the system, such as heat pump operation and heat storage / radiation in the heat storage body, as well as the movement and installation are improved. . Furthermore, since the elements are arranged close to each other by downsizing the entire apparatus, the pipe length and the like can be shortened, and the efficiency of the system can be improved.

  As described above, since the heat pump heat storage device according to the present invention can store the generated heat in a compact state, the heating / drying system using the electric water heater or the electric heat storage, and further the solar heat or kerosene boiler. It can also be applied to the use of a heat storage system using as a heat source.

The block diagram of the heat pump thermal storage apparatus in Embodiment 1 of this invention The block diagram of the heat pump thermal storage apparatus in Embodiment 2 of this invention The block diagram of the heat pump thermal storage apparatus in Embodiment 3 of this invention The block diagram of the heat pump thermal storage apparatus in Embodiment 4 of this invention The block diagram of the heat pump thermal storage apparatus in Embodiment 5 of this invention The block diagram of the heat pump thermal storage apparatus in Embodiment 6 of this invention Configuration diagram of other heat pump heat storage device The block diagram of the heat pump thermal storage apparatus in Embodiment 7 of this invention Configuration diagram of conventional heat pump heat storage device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Heat radiation part 3 Expansion valve (decompressor)
DESCRIPTION OF SYMBOLS 4 Evaporator 5 Heat storage part 7 Heat receiving part 8 Mixing means 9 Dividing means 10 Heat exchanger 11 Fluid flow path 12 Liquid reservoir (accumulation part)
13 cases

Claims (10)

A compressor, a heat radiating unit, a pressure reducing unit, and an evaporator are connected in order, and a refrigerant circuit through which a refrigerant flows and a fluid circuit having a heat receiving unit and through which a heat receiving fluid flows are provided. A heat pump heat storage device in which a heat transfer mechanism is formed through a heat storage section in which an agent is disposed. The heat pump heat storage device according to claim 1, wherein a plurality of heat storage units are provided. The heat pump heat storage device according to claim 2, wherein the heat storage unit is divided and arranged in the flow direction of the refrigerant in the heat radiating unit. The heat pump heat storage device according to claim 3, wherein a heat insulating portion is provided between the heat storage portions divided and arranged. The heat pump heat storage device according to claim 2, wherein heating units and heat receiving units are alternately arranged between the heat storage units, and heat is sequentially transmitted. The heat pump heat storage device according to any one of claims 1 to 5, further comprising heat exchange means for exchanging heat between the refrigerant that has passed through the heat radiating portion and the heat receiving fluid. The heat pump heat storage device according to any one of claims 1 to 6, wherein the fluid circuit through which the heat receiving fluid flows includes a plurality of flow paths that pass through at least a part of the heat receiving unit. The heat storage device according to any one of claims 1 to 7, wherein the heat storage agent comprises a plurality of heat storage agents having different heat storage temperatures. The heat pump heat storage device according to any one of claims 1 to 8, further comprising a heat receiving fluid accumulating unit that receives heat at the heat receiving unit. The heat pump heat storage according to any one of claims 1 to 9, further comprising a bypass circuit of the heat receiving unit and a mixing unit provided in the bypass circuit, and a case for storing the refrigerant circuit, the heat storage body, and the mixing unit. apparatus.

Images