JPS6186525A - Heat accumulating type room cooling and heating system - Google Patents

Abstract

PURPOSE:To reduce peak load by a method whrein heat is accumulated in a heat accumulating section by utilizing midnight electric power to flow cooled warm-air through the heat accumulating section and the heat is given to circulating air, flowing through the heat accumulating section, upon the peak load. CONSTITUTION:The comparatively inexpensive midnight electric power is utilized at night to operate a compressor 10 and a fan 5 and flow cold air, cooled by the heat exchange of a direct expansion coil 7, by switching a damper 22. According to this operation, heat is accumulated in the heat accumulating section 4. During usual operation in a daytime, the recirculating air (R.A) is introduced through an airflow window 6 by opening a return damper 27 and closing the return damper 23 while the recirculating air (R.A.) is introduced through a return gallery 26 by closing the return damper 27 and opening the return damper 23 during peak operation. In this case, the recirculating air (R.A.) is cooled temporarily by heat exchange between a heat accumulating body 12 and whereby heat load may be reduced.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to an air conditioning system that individually cools and heats rooms in an office building, etc., and a heat storage body that stores heat to cope with peak loads during air conditioning. Regarding technology to systemize.

(b) Background of the technology In air-conditioning equipment that individually cools and heats rooms in office buildings, etc., there is a need to equalize the power load and downsize the equipment. A heat storage body that can cut the heat is systemized with air conditioning equipment. Normally, the heat storage body stores heat by using cheap late-night electricity at night, and gives the stored heat to return air when the indoor temperature reaches its peak during heating and cooling.

(c) Prior art and problems However, in the past, as the heat storage body, an open heat storage tank a as shown in FIG. 5 or a closed heat storage tank a' as shown in FIG. Because of this, it had the following drawbacks: In other words, both the open heat storage tank a and the closed heat storage tank a" are intended for use in all rooms. Therefore, they have a large capacity and require dedicated installation space in a specific location of the building. The flow line for energy transport to the room becomes longer, resulting in greater energy loss.

In the case of the open type heat storage tank a, the water content in the IWa is circulated through a circulation circuit e equipped with a pump C and a refrigerator d for cooling, and the cold water is supplied to terminal equipment (fan coil unit, etc.) in each room by a pump f. ) is sent to g. Tank a is constructed using the aesthetics of the building. In addition, a closed heat storage tank a
In the case of ``,'' the water contained in tank a'' is heated by a heater i, and the hot water is sent to a terminal device (fan coil unit, etc.) k in each room by a pump j.

In addition, in recent years, heat storage methods that use crushed stone and ice are being put into practical use, but since these heat storage methods are intended to be used centrally in all rooms, they are similar to the above-mentioned heat storage devices. A problem arises.

Purpose of the Invention Therefore, this invention eliminates the need to provide a dedicated space for installation in a specific location such as a building, and enables heat storage near where the heat is used, reducing energy transport loss and heat storage locations. To provide a heating and cooling system using a heat storage body that can store and utilize energy with high efficiency while minimizing loss due to thermal effects.

K) Structure of the Invention In order to achieve such an object, in the first invention, a heat storage unit comprising a heat storage body made of a gel-like latent heat storage material and a heat storage container for accommodating the heat storage body is mounted on a ceiling. The device is installed in an idle space outside the indoor living space such as a back space, and the cold/hot air from the air conditioner is configured so that it may be introduced into the room by switching the damper or may pass through the heat storage container. In addition, the indoor return air is configured so that it sometimes flows through a return air path that returns directly to the heating and cooling device, and that it flows through a return air path that passes through the heat storage container and returns to the heating and cooling device.

In addition, in the second invention, a heat storage unit including a flat heat storage body made of gel-like Wi thermal heat storage material and a heat storage container in which the heat storage body is placed on a plurality of shelves provided inside is installed in a space under the ceiling. The device is installed in an idle space outside the indoor living space such as a space, and the cold and hot air from the air conditioning device is sometimes introduced into the room by switching dampers, and sometimes passes between the shelves in the heat storage container. In addition, indoor return air is configured so that it sometimes flows through a return air path that returns directly to the heating and cooling device, and that it flows through a return air path that passes between the shelves in the heat storage container and returns to the heating and cooling device.

Furthermore, the third invention provides a heat storage unit including a heat storage body formed by collecting a large number of spherical or polyhedral heat storage units made of a gel-like latent heat storage material, and a heat storage container that accommodates the heat storage body. The device is installed in an idle space outside the indoor living space, such as the attic space, and the cold and hot air from the air conditioning device is sometimes introduced into the room by switching dampers, and sometimes passes between heat storage masses in the heat storage container. The indoor return air may flow through a return air path that returns directly to the heating and cooling equipment, or may flow through a return air path that passes between heat storage masses in the heat storage container and returns to the heating and cooling equipment. There is.

(f) Examples of the invention Hereinafter, this invention will be specifically explained based on FIG. 1.

In the figure, ■ is a living room, 2 is a wall-through air conditioning system installed in the attic space 3 of the living room l, and 4 is an M heating section also installed in the attic space 3.

In the case of the illustrated cooling operation, the heating and cooling apparatus 2 uses return air (R・A) introduced into the apparatus through the air flow window 6 by suction of the air blower tJ31) 5 during normal operation.
is cooled through direct expansion coil 7, and then cooled by blower 5. It is led out into the living room 1 from each blow-off slot 9 via a duct 8 . Note that the direct expansion coil 7 is connected to the condenser 1 through the compressor 10.
) is flowing, and warmed return air (R
When -A) passes through the direct expansion coil 7, its heat is absorbed by the refrigerant, that is, it is cooled by heat exchange.

As shown in FIGS. 2 and 3, the heat storage section 4 is made of a gel-like latent heat storage material (for example, sodium sulfate 1O hydrate (Na
2 S 04 ・10 H20) *Calcium chloride hexahydrate (CaCj!2' 6H20), etc.) is placed on a flat heat storage body 12 and a multi-stage shelf 13 provided with the heat storage body 12 inside. A thin prismatic heat storage container (usually made of iron plate 14).

Then, the heat storage section 4 connects the heat storage container 14 to the upper floor slab 1.
It is installed in the attic space 3 by being suspended from the lower surface of the ceiling 5 by embedded bolts 16 or the like.

The heat storage bodies 12 placed in each column 13 are unitized by a large number of divided bodies 17. In the illustrated case, the divided body 17
are square, and a plurality of them are arranged in three rows.

The heat storage container 14 has a heat storage body storage section 1 that accommodates the heat storage body 12.
8, an introduction part 19 and an extraction part 20 which are bolted together before and after this.

The introduction section 19 and the blower 5 are connected by a duct 21, and when the damper 22 provided near the blower 5 is switched, the cold air from the air-conditioning device 2 flows through the deck 1-2 and the introduction section 19 to the heat storage container. 14. Cold air on each shelf 1
3 and is introduced into the air conditioning system 2 via the damper 23. When the cold air flows between the shelves 13, heat is absorbed by the divided bodies 17 of the heat storage bodies 12 placed in each column 13.

In other words, heat is stored in the M heat section 4. in this case,
The divided body 17 undergoes a phase change from gel-like to solidified.

During heating operation, the phase changes from gel-like to molten. Note that when the damper 22 is switched, the cold air flows into the living room 1 from the blow-off slot 9 via the duct 8. Further, the damper 22 is controlled by a remote controller (not shown).

A return louver 26 connected to the introduction part 19 of the heat storage container 14 through a duct 25 is provided on the ceiling 24 of the living room 1. The return air (R-A
) is duct 25. It flows into the M heat container 14 through the introduction part 19, flows between the shelves 13, and is introduced into the air-conditioning device 2 via the damper 23. When the return air (R-A) flows between each shelf 13, it exchanges heat (cold heat absorption) with the divided body 17 of the heat storage body 12 placed in each column 13, is cooled, and then passes through the direct expansion coil 7. is subjected to secondary cooling. Secondary cooled return air (
R-A) is the blower 5. It is led out into the living room 1 from each blow-off slot 9 via a duct 8 . In this way, return air (R-
When introducing A) into the return gallery 26, the return dampers 27 of the six airflow windows are closed and the dampers 23 are opened. These return dampers 23 and 27 are controlled by a sensor (thermostat) 28 installed in the living room 1, and when the inside of the living room 1 is within a predetermined temperature, the return damper 27 is opened and the return damper 23 is closed, and the predetermined temperature is maintained. If it exceeds the limit, the return damper 27 will be closed and the return damper 23 will be opened.

In such a heating and cooling system, the compressor IO and the blower 5 are operated at night by using cheap late-night electricity, and the direct expansion coil 7 is operated by switching the damper 22 as described above.
The cold air that has been cooled by heat exchange is caused to flow through the duct 21. Thereby, heat is stored in the heat storage section 4.

During normal operation during the day, return air (R-A) is released by opening the return damper 27 and closing the return damper 23.
is introduced from the air flow window 6, and during peak operation, return air (RA) is introduced from the return louver 26 by closing the return damper 27 and opening the return damper 23.

In this case, the return air (R-A) is primarily cooled by heat exchange with the heat storage body 12, and the heat load is reduced.

FIG. 4 shows a modified structure of the heat storage section.

In this heat storage section 4', the heat storage body 12' is constructed by assembling a large number of spherical (or polyhedral) heat storage sections 17. After housing the heat storage body 12' at both ends of the heat storage body storage part 18' of the heat storage container 14'', the horizontal lids 29, 3 are closed.
0 is set. In the case of this heat storage section 4', the duct 21''
and return air from the return louver 26' (
R-A) flows between the heat storage portions 17 and undergoes heat exchange.

In the case of illustration, although the cooling operation was explained, the heating operation is also performed in the same manner. Further, the heat storage section can be installed outside the attic space, in idle spaces such as columns (box columns), floors (void slabs), and between partitions with external walls. Furthermore, the structure of the latent heat storage material, the structure of the heat storage container, etc. may also be changed depending on the installation location, heat storage capacity, etc.

(g) Effects of the invention In short, the heat storage heating and cooling system according to the present invention has the following effects:
A heat storage unit comprising a heat storage body made of a gel-like latent heat storage material and a heat storage container that houses the heat storage body is installed in an idle space outside the indoor living space such as the attic space, and the heat storage unit is installed in an idle space outside the indoor living space such as an attic space. The cold/hot air is configured so that it may be introduced into the room by switching the damper or may pass through the heat storage container, and the indoor return air may flow through the return air path that returns directly to the air conditioning system or may be introduced into the heat storage container. The structure is such that the return air may flow through the return air path and return to the heating and cooling equipment.
■ Heat can be stored in the M heat section by making cold and hot air flow through the heat storage section using cheap late-night electricity at night, and by giving that heat to the return air flowing to the heat storage section during peak hours, peak load Therefore, it is possible to level out the power load and downsize the device. ■The heat storage unit is installed in an idle space outside the indoor living space;
There is no need for a dedicated installation space like in the past. ■Since the heat is stored close to where it is used, the energy transport flow line is short and there is little energy loss. ■The heat storage part is packaged, so , It is difficult to be affected by the heat of idle spaces, so the heat storage efficiency is high.■ The amount of heat storage in the entire building can be increased, which alleviates temperature changes in the outside world and maintains a comfortable indoor temperature environment. It has the advantages mentioned above.

Further, in the case of the present invention, as in the first embodiment, when the M heating body is made into a flat shape and placed on a plurality of shelves formed like a silkworm shelf inside the heat storage container, High rectification of cold and hot air or return air flowing through the interior, low pressure loss of the blower, ■ High stability (shape retention) when the heat storage body changes phase from gel-like (particularly melting); By configuring it with a plurality of divided bodies, (1) productivity and maintenance become easier.

Furthermore, when the heat storage body is constructed by collecting a large number of spherical or polyhedral heat storage parts as in the second embodiment, the cold and hot air or return air flows between the heat storage blocks and exchanges heat. The effective surface area is large, and the heat storage efficiency and peak load reduction rate are high.

Note that this invention is applicable not only to office buildings but also to apartment complexes, passenger ships, etc.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the heat storage section, FIG. 3 is a XX sectional view of the same, and FIG. 4 is a sectional view showing a deformed structure of the heat storage section. , FIG. 5, and FIG. 6 are sectional views showing conventional heat storage bodies, respectively. In the figure, 1 is a living room, 2 is an air conditioning system, 3 is an attic space (idle space), 4 and 4 degrees are heat storage areas, 6 is an air flow window, 8.2, 21", 25 is a duct, and 9 is an air outlet slot. , 12.12' is the M heating element, 13 is the shelf, 14.1
4' is a heat storage container, 17 is a divided body, 17' is a heat storage part,
22, 23, and 27 are dampers, 26, 26' are return louvers, and R and A are return air.

Claims (4)

[Claims] (1) A heat storage unit comprising a heat storage body made of a gel-like latent heat storage material and a heat storage container that houses the heat storage body is installed in an idle space outside the indoor living space such as an attic space, The cold and hot air from the air conditioner is configured to be introduced into the room by switching the damper or to pass through the heat storage container, and the indoor return air may flow through a return air path that returns directly to the air conditioner. A heat storage air conditioning/heating system characterized by being configured such that air may flow through a return path passing through a heat storage container and returning to an air conditioning/heating device. (2) A heat storage unit comprising a flat heat storage body made of gel-like latent heat storage material and a heat storage container that is placed on a multi-tiered shelf with the heat storage body installed inside the room, such as an attic space. The device is installed in an idle space outside the space, and the cold and hot air from the air conditioning device is configured so that it is sometimes introduced into the room by switching dampers and sometimes passes between the shelves in the heat storage container, and
The heat storage device is characterized in that indoor return air is configured so that it sometimes flows through a return air path that returns directly to the air conditioning device, and that it flows through a return air path that passes between each shelf in the heat storage container and returns to the air conditioning device. Heating and cooling system. (3) The heat storage heating and cooling system according to claim 2, wherein the heat storage body placed on each shelf is constituted by a plurality of divided bodies. (4) A heat storage unit comprising a heat storage body consisting of a large number of spherical or polyhedral heat storage units made of a gel-like latent heat storage material and a heat storage container that accommodates the heat storage body is installed in a space such as an attic space. The device is installed in an idle space outside the indoor living space, and the cold and hot air from the air conditioning device is configured so that it is sometimes introduced into the room by switching dampers and sometimes passes between heat storage masses in the heat storage container, In addition, the indoor return air is configured such that sometimes it flows through a return air path that returns directly to the air conditioning device, and sometimes it flows through a return air path that passes between heat storage masses in the heat storage container and returns to the air conditioning device. A thermal storage heating and cooling system.