JPS6217597A - Heat accumulating device - Google Patents

Abstract

PURPOSE:To obtain the optimum heat accumulating performance by reducing the air flow resistance and enhancing the regenerating efficiency of temperature by forming a heat accumulating body by stacking multiple heat accumulating plates with a spacer inbetween, and using the space between heat accumulating plates as air passage to heat exchanging air. CONSTITUTION:The heat accumulating device S has a sealed body 25 made of heat insulating material, either side portion of which is used as a hollow space 26, 26, remaining space being filled with heat accumulating body 27. One of the hollow spaces 26 has an opening to which the main duct 2 is connected, and the other hollow space 26 has an opening to which the auxiliary duct is connected. The heat accumulating body 27 is made up with multiple combined heat accumulating plates 28. Said heat accumulating plates 28 are made by stamping in nearly rectangular plates to enhance the specific heat of the material. By aligning the direction of projections 29, 29 which are spacers integrally formed at both ends on one side, the space is preserved between heat accumulating plates 28. By disposing the heat accumulating body 27 in a manner that the space is directed to the hollow spaces 26, 26, the space acts as the air passage 30.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a heat storage device using a heat pump type air peace machine installed, for example, in a general house.

[Technical background of the invention and its problems]

Conventionally used heat storage devices include, for example, those used as part of large-scale waste heat recovery systems, crushed stone heat storage type used as part of so-called solar houses, and heat storage type combined with crushed stone and water tanks. There are a wide variety of types, including water heat storage type, ice (latent heat storage material) heat storage type, etc.

By the way, it goes without saying that even in ordinary houses that are not solar houses, it would be advantageous in terms of energy savings and running costs if heat could be stored by some means. In this respect, a heat storage device for the above-mentioned large-scale waste heat recovery system is out of the question, but a crushed stone heat storage type or smaller is attracting attention.

Although the crushed rock type heat storage device can be constructed at low cost and has excellent heating performance, it has low temperature regeneration efficiency and high air resistance, and the resistance value cannot be accurately determined at the design stage. Moreover, it has disadvantages such as the large size of the equipment and the need for a large amount of dedicated space. In addition, a heat storage device that uses water requires a fairly large water tank and piping for guiding the heat exchange water, making maintenance and management time-consuming and troublesome for ordinary households. A heat storage device using ice has a more complicated structure and is not common.

By the way, in general houses, there is a tendency for heat pump air conditioners that can be switched between cooling operation and heating operation to be frequently used, and there is a demand for the development of a heat storage device that is optimal for connection to this heat pump type air conditioner. That is, if a heat storage device can be used in combination, the range for adjusting the heat output of the air conditioner will be expanded, and it will be possible to extract a larger heat output than that of the heat pump alone, allowing multi-room cooling/heating operation. In other words, an air conditioner with smaller output can be used. Furthermore, due to the nature of the heat pump type air peace machine, it is possible to use late-night power, which can alleviate peak power consumption especially in the summer, and can quickly respond to rising loads in the morning.

Despite having such various advantages, the reason why it has not become widespread is that a high-performance heat storage device with excellent thermal characteristics while being small and low cost has not been developed.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to provide a heat pump air conditioner with low air flow resistance, high temperature regeneration efficiency, and optimal heat storage performance for heat pump air conditioners. The purpose of this invention is to provide a heat storage device that can be configured as a compact system for air conditioning in general homes and small-scale buildings.

[Summary of the invention]

That is, the present invention provides a heat storage device characterized in that a heat storage body is constructed by stacking a large number of heat storage plates together via spacers, and the gaps between the heat storage plates are air passages through which heat exchange air is conducted. be.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 schematically shows, for example, an air conditioning system in a general house. Reference numeral 1 denotes a heat exchange room, and a heat storage device MS, which will be described later, is provided under this floor. A solar duct 2 using a wall, for example, communicates with one end of the heat storage device S, and an auxiliary duct 3 communicates with the other end. Above solar duct 2
extends to the ceiling of the heat exchange room 1, and a conduction port 5 that is opened and closed by a blower damper 4 is provided in the middle. An air-conditioning fan 6 and a blenheim chamber 7 are provided in the upper part. From the Blenheim room 7 there are multiple ceiling ducts 8.
... are connected to each other and communicate with the air outlet 9 provided in the ceiling of the heat exchanger f11, respectively.

Incidentally, air conditioning dampers 10 are provided in the middle of each of the ceiling ducts 8. On the other hand, a suction duct 12 accommodating a suction fan 11 communicates with the communication port 5, and an indoor heat exchanger 13 of a general heat pump type air conditioner H is disposed at the end thereof. The opening of the auxiliary duct 3 faces this indoor heat exchanger 13 . The heat pump type air conditioner H is installed outside the heat exchange room 1.
An outdoor unit 14 is provided. This outdoor unit 1
4 is a compressor 15, a four-way switching valve 16, an outdoor heat exchanger 1
7, a blower fan 18, and the like are integrated into a unit, and communicated with the indoor heat exchanger 13 via a refrigerant pipe 19. 20 is a solar system, and a solar heat collector 21 is arranged on the roof of the house. The inclined upper part of the solar heat collector 21 and the lower end of the solar duct 2 are communicated by a heat collecting duct 22, and the communicating part with the solar duct 2 can be opened and closed by a solar damper 23. The inclined lower part of the solar heat collector 21 and the heat exchange room 1
It is communicated with the inside by a return duct 24.

Next, the heat storage device IS will be explained. As shown in FIG. 2, reference numeral 25 denotes a sealed device main body made of a heat insulating material, and both sides thereof serve as space chambers 26° 26, and the remaining space is filled with a heat storage body 27. One space chamber 26 is provided with an opening 26a to which the solar duct 2 is connected, and the other space chamber 26 is provided with an opening (not shown) to which the auxiliary duct 3 is connected. The heat storage body 27 is formed by combining a large number of heat storage plates 28 as shown in FIG. The heat storage plate 28 is made of a special cement material that does not contain asbestos, a pressed mortar material, or a special gypsum material. It is pressed into a roughly rectangular plate shape. On its side and along both ends, projections 29, 29, which are spacers, are integrally provided.

As shown in FIG. 3, the heat storage body 27 is constructed by stacking a large number of heat storage plates 28.... However, the projection 29.
Align all the orientations of the heat storage plates 28 in the same direction, and heat storage plates 28...
form a gap between them. As shown again in FIG.
, the gap forms an air passage 30. In this way, the heat storage plate 28 is produced in a factory according to the required performance, so quality and construction management are stable.

Therefore, in order to store heat using late-night electricity, it is necessary to drive the heat pump type air conditioner H and the suction fan 1.
1 to open the blower damper 4. Air (cold air or warm air) that has been heat exchanged through the indoor heat exchanger 13
is guided to the heat storage device S via the sawn duct 2, and exchanges heat with the heat storage body 27 while being conducted through the air passage 30. Therefore, the heat of cold air or warm air is stored in the heat storage body 27.

The air after heat exchange discharged from the heat storage device S via the auxiliary duct 3 is sucked into the indoor heat exchanger 13 again, circulates through the above-mentioned path, and performs a heat storage action.

Furthermore, in order to store heat using the solar system 20, the solar damper 23 may be opened. Solar heat collector 21
The warm air heated by exchanging heat with the heat collecting duct 22 is guided to the heat storage irms and stored therein.

Note that when each heat exchange air such as cold air or warm air conducts through the air passage 30 provided in the heat storage body 28, it comes into contact with the front and back surfaces of each heat storage plate 28, and heat is exchanged over the entire surface. Therefore, it has good heat storage properties. Since the air passages 30 are arranged in an orderly manner along one direction, the common resistance can be small. Further, since the volumes of the heat storage body 27 and the air passages 30 can be set in advance, calculation of the heat storage l and the ventilation resistance value is easy.

To condition the air in the heat exchange room 1 as needed, the blower damper 4 is closed and the air conditioning fan 6 is driven. Then,
The cold air or warm air stored in the heat storage device S rises through the sawn duct 2, is regulated in pressure in the blennium chamber 7, and is sent to the air outlet 9...
It is blown out into the heat exchange chamber 1 from the heat exchange chamber 1. That is, air conditioning is achieved by exchanging heat in the heat exchange room 1. The air returned from the heat exchange chamber 1 after heat exchange is sucked into the auxiliary duct 3, exchanges heat with the heat storage device MS again, and circulates through the above-mentioned path. The heat storage device S is provided with a heat storage sensor (not shown), and when the heat storage body 27 runs out of heat storage and the temperature change becomes large, it sends a signal to the heat pump type air peace machine H to drive it. The air conditioner H directly conditions the air in the heat exchange room 1. At this time, air conditioning is performed in each heat exchange room 1...
- Needless to say, if these are not carried out at the same time and there is excess energy, it is stored in the heat storage device S.

The above heat pump air conditioner! IH must maintain a high coefficient of performance, so even a slight drop in temperature due to the heat exchange action of the heat storage body 27 has a large effect. In other words, the heat storage device S must have high temperature regeneration efficiency. Assuming that the thermal insulation is perfect so that heat does not escape from the heat storage body 27 to the outside, the temperature regeneration efficiency is determined from the following factors. That is, the heat transfer area and heat transfer coefficient between the heat storage body 27 and the fluid per unit volume, the depth of the heat storage device S, and the time for switching heat in and out, etc. The wider the surface area and the longer the depth of the heat storage body 27, the greater the fluid flow resistance. Therefore, with the above configuration, the flow resistance of the fluid air can be small, and the heat transfer area can also be large.

In the above embodiment, protrusions 29 and 29, which are spacers, are provided along both ends of one side of the heat storage plate 28, but the invention is not limited to this. For example, as shown in FIGS. It may be as shown in the figure. That is, the heat storage plate 288 shown in FIG. 5 is provided with protrusions 29a along both ends and approximately at the center. The heat storage plate 28b shown in FIG. 6 is further provided with a large number of protrusions 29b on its negative side. Heat storage plate 28 shown in FIG.
C is provided with a large number of protrusions 29C on both sides thereof. The heat storage plate 28d shown in FIG. 8 is provided with a plurality of circular protrusions 29d on its negative side. The heat storage plate 28e shown in FIG. 9 is bent to have a corrugated cross section, and protrusions 29e are integrally formed on both sides of the heat storage plate 28e. 10th
The heat storage plates 28f shown in the figure are bent into finer wave shapes, and a large number of protrusions 29f are formed on both surfaces. All of the heat storage plates 28a to 28f are made of the same material as in the above embodiment, and a large number of these plates are stacked in the same direction to form a heat storage body. Needless to say, the presence of the projections 29a to 29f ensures an air passage.

In addition, in each of the above embodiments, the spacer was provided integrally with the heat storage plate, but the present invention is not limited to this. A spacer that is completely separate from the heat storage plate is prepared, and this is installed between the heat storage plates. may also be mediated by

It goes without saying that various other modifications can be made without departing from the scope of the invention.

(Effects of the Invention) As explained above, according to the present invention, it is inexpensive, compact, has significant effects in terms of start-up, operation and maintenance, running costs, etc., and can be used in combination with a heat pump type air conditioner. It is possible to provide a heat storage device that can obtain optimal heat storage characteristics.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a schematic diagram of an air conditioning system in a general house, FIG. 2 is a partially cutaway perspective view of a heat storage IUT, and FIG. The fourth factor is a perspective view of a heat storage plate, and FIGS. 5 to 10 are perspective views of heat storage plates of different shapes showing other embodiments of the present invention. 2... Spacer (protrusion), 28... Heat storage plate, 27
...Heat storage body, 3o...Air passage. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 4

Claims (1)

[Claims] A heat storage body consisting of a large number of heat storage plates stacked together via spacers,
A heat storage device comprising: an air passage formed in a gap between the heat storage plates of the heat storage body and through which heat exchange air is conducted.