JP2000213776A - Air conditioning equipment based on heat accumulation through building body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize a body of a building as heat accumulation medium. SOLUTION: In a normal air conditioning operation, a pit 1 formed on a foundation part of a building is utilized as chamber for the intake of outside air, and the outside air taken in through the pit 1 is treated by an air conditioning device 8 to be supplied to a room to be air conditioned, while a heat accumulation operation is accomplished for a foundation beam 2 and a foundation bottom plate 3 as body components composing the pit 1 by circulating air in the pit 1 being treated by the air conditioning device. An outside air heat accumulation operation is performed for accumulation of heat by cooling the body using the outside air under a natural ventilation or forced ventilation within the pit 1. The inside of the pit 1 is sectioned by a number of section walls while an opening part 5 is provided on each of the section walls to arrange an outside air passage in a serpentine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system for performing air conditioning (air conditioning) on a living space of a building, and more particularly to a building thermal storage type air conditioning system using a building framework as a heat storage medium.

[0002]

2. Description of the Related Art As is well known, a heat storage system in an air conditioner performs a heat storage operation on a heat storage medium at night or at a low load, and uses the retained heat at a peak load to perform a peak cut of a load. As a result, the capacity of the heat source unit and the running cost can be reduced, which is also effective from the viewpoint of energy saving.

The most common type of heat storage system uses water stored in a heat storage tank as a heat storage medium. In recent years, use of another heat storage medium has been studied. Above all, it is considered that the skeleton of a reinforced concrete building can be expected to secure a considerable amount of heat storage, so that it is effective as a heat storage medium.

[0004]

As described above, when the skeleton of a building is to be used as a heat storage medium, the target skeleton is mainly an outer wall or a slab. It is necessary to provide sufficient heat insulation to the outer wall, and it is indispensable to provide external heat insulation particularly to the outer wall. Therefore, not only is the cost inevitably high, but also the construction must be complicated and troublesome, which is one of the factors that hinder the spread of heat storage in the building.

[0005] In view of the above circumstances, an object of the present invention is to provide an air conditioner capable of effectively using a building frame as a heat storage medium.

[0006]

According to the present invention, there is provided a building thermal storage type air conditioner utilizing a building frame as a heat storage medium, wherein a pit formed in a base portion of the building is provided for taking in outside air. It is used as a chamber, performs normal air-conditioning operation in which outside air taken in through the pits is processed by an air conditioner and supplied to a room to be air-conditioned, and the air in the pits is processed and circulated by the air conditioner to process the air. The heat storage operation is performed for the skeleton constituting the pit.

According to a second aspect of the present invention, an outside air heat storage operation is performed in which the pit is cooled by external air to store heat by natural or forced ventilation in the pit.

According to a third aspect of the present invention, the inside of the pit is divided by a large number of partition walls, and openings are provided in each of the partition walls for external air circulation. A flow passage is formed, and the position of the opening is set so that the outside air flow passage meanders.

[0009]

1 to 3 show an embodiment of an air conditioner according to the present invention. The air conditioner of the present embodiment uses a pit 1 formed in a foundation of a building as a chamber for taking in outside air, and uses a frame constituting the pit 1 as a heat storage medium.

The pit 1 is a space naturally formed for providing a foundation beam 2 and a foundation bottom slab 3 as a reinforced concrete foundation frame, and has a height corresponding to the beam structure of the foundation beam 2. The periphery is in contact with the ground via the foundation beam 2 or the underground outer wall at the outer peripheral portion, the bottom is in contact with the ground via the foundation bottom slab 3, and the slab 4 serving as the floor of the lowest floor is provided at the upper part, and is substantially provided. It is a closed space, and the inside is partitioned by many foundation beams 2.

The above-mentioned pit 1 is a dead space which is at most only useful as a spring treatment pit or a heat storage tank in an ordinary building. In this embodiment, the pit 1 is used as a chamber for taking in outside air. In order to use, an opening 5 is formed in the foundation beam 2 that partitions the inside of the pit 1.
Is provided to secure a series of outside air flow passages. The positions of the openings 5 provided in the respective foundation beams 2 are alternately arranged in the vertical and horizontal directions so that the external air flow passage is in a meandering state.

An outside air intake duct 6 is connected to the pit 1 at an upstream portion of the outside air flow passage, and an air conditioner 8 is connected to a downstream portion of the pit 1 via an intake duct 7. Air conditioner 8
Is an outside air conditioner (air conditioner for treating outside air) installed in the machine room on the lowest floor, which processes outside air taken in through the pit 1 as described later, and air conditioners (AHU: In addition to the normal operation of supplying air to the air handling unit, the outside air processed to perform the heat storage operation for the pit 1 is returned to the return air duct 10.
Through which the pit 1 can be returned to the upstream side.

Further, for the pit 1, the duct 11 connecting the base of the main duct 9 and the pit 1 and the top of the main duct 9 are opened to the outside in order to perform the outdoor air heat storage operation by natural ventilation. A discharge duct 12 is provided.

An operation mode of the air conditioner having the above configuration will be described. Reference numeral 13 in the figure denotes dampers attached to key points of each duct.
Is shown only when used in the closed state, and is not shown in the open state.

FIG. 1 shows a normal operation mode for normal cooling operation and heating operation. In this case, by operating the air conditioner 8, outside air is taken in from the intake duct 6 through the pit 1, treated with outside air, and supplied to the air conditioners on each floor through the main duct 9. At this time, heat is already stored in the frame (ie, the foundation beam 2, the foundation bottom slab 3, and the slab 4) constituting the pit 1 in the heat storage operation mode or the outside air heat storage operation mode described below, and the stored heat is stored in the outside air. The heat is dissipated and used. That is, during cooling, pit 1
Is cooled to a predetermined heat storage temperature (for example, about 15 to 20 ° C.).
The high-temperature outside air taken in is cooled by flowing through the outside-air flow passage while being in contact with such a low-temperature frame, and then taken into the air conditioner 8. During heating, the body is heated to a predetermined heat storage temperature (for example, about 30 ° C.), and low-temperature outside air is heated and then taken into the air conditioner 8. Therefore, the outside air load processing amount of the air conditioner 8 is reduced both in summer and winter.

FIG. 2 shows a heat storage operation mode in which heat is stored in the pit 1 by the air conditioner 8 during a non-air-conditioning time period such as at night. In this case, the air conditioner 8 processes the air in the pit 1 and circulates it through the return air duct 10 so as to return to the pit 1 so that the frame has a predetermined heat storage temperature. That is, in the summer, the blowing temperature is about 15 to 20 ° C., and in the winter, the blowing temperature is about 30 ° C., and such cold air or hot air is supplied to the pit 1 and circulated through the outside air passage. The body of the pit 1 is cooled or heated to the heat storage temperature as described above.

FIG. 3 shows an outside air heat storage operation mode in which heat is stored in the body of the pit 1 by natural ventilation by the outside air when the outside air temperature condition such as an intermediate period is satisfied. That is,
When the outside air temperature is lower than the indoor set temperature during the night of the cooling season or the like, if the outside air is passed through the pit 1 as it is, the frame can be cooled to the outside air temperature and stored. Therefore, if the base of the main duct 9 is connected to the pit 1 by the duct 11 and the top of the main duct 9 is opened to the outside through the discharge duct 12, the relatively high temperature air in the pit 1 causes the chimney effect of the main duct 9. And naturally ventilates such that relatively low-temperature outside air flows into the pit 1 through the intake duct 6, thereby cooling the pit 1 frame to the outside air temperature and reducing the temperature to that temperature. Heat is stored.

According to the air-conditioning system described above, the frame of the pit 1 can be effectively used as a heat storage medium in each of the above operation modes. In particular, the foundation beam 2 and the foundation slab 3 which are the skeletons constituting the pit 1 are structurally robust and have a large cross section as the foundation of the building, and therefore have a large heat capacity by themselves, and the slab 4 on the upper surface. Because it is in contact with the ground except for, it is naturally excellent in heat insulation performance, and there is no need to perform any special heat insulation work. Moreover, the temperature of the ground is stable throughout the year and is about 15 ° C, which is almost the same as the heat storage temperature in summer. From the above, the skeleton of the pit 1 is most suitable as a heat storage medium, and a remarkably excellent heat storage effect can be obtained as compared with a conventional case where a general outer wall or slab is used as a heat storage medium. Further, since the pit 1 which is a dead space is effectively used, no special installation space is required, which is reasonable.

In addition, the above-mentioned air conditioning equipment performs heat storage by natural ventilation in the outside air heat storage operation mode shown in FIG. 3 depending on the outside air condition. The required running cost can be reduced.

Furthermore, since the opening 5 is provided in the foundation beam 2 which partitions the inside of the pit 1 to secure the meandering external air flow path, the external air flow path can be long and the short circuit can be prevented. As a result, the heat storage efficiency can be improved. In the above-described embodiment, the meandering external air flow path is formed by using the foundation beam 2 naturally provided in the pit 1 as a partition wall and providing the opening 5 therein. Of course, if necessary for securing the space, a partition wall for that purpose may be provided at a key point.

Although the air conditioner 8 in the above embodiment is an external air conditioner dedicated to outside air processing, it may be an ordinary air conditioner that also processes indoor load. In the above embodiment, the outside air heat storage operation mode is based on natural ventilation using the chimney effect of the main duct 9, but is not limited thereto, and mechanical ventilation of the pit 1 is performed by the air conditioner 8 or a separately provided ventilation fan. Thus, heat storage by outside air may be performed. Of course, the use and scale of the building are not limited at all, and the air conditioning system of the whole building is optional as long as the pit 1 is used as a chamber for taking in outside air and its frame is used as a heat storage medium.

[0022]

According to the first aspect of the present invention, a pit formed in a foundation of a building is used as a chamber for taking in outside air, and a concrete frame such as a foundation beam or a foundation bottom slab constituting the pit is used. Since the heat storage medium is used as a heat storage medium, a body with a large heat capacity and excellent heat insulation performance can be used effectively as a heat storage medium, and it is much better than the conventional case where a general outer wall or slab is used as a heat storage medium. The heat storage effect can be obtained. In addition, since the pit, which is a dead space, is effectively used, no special space is required, which is reasonable.

According to the second aspect of the present invention, the running cost required for the heat storage operation is reduced because the outside air heat storage operation is performed in which the pit frame is cooled by the outside air to store heat by natural or forced ventilation in the pit. can do.

According to the third aspect of the present invention, since the outside air flow passage in the pit is meandered, the outside air flow passage can be secured long, and short circuit can be prevented to improve heat storage efficiency.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a normal operation mode of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a system diagram showing a heat storage operation mode.

FIG. 3 is a system diagram showing an outside air heat storage operation mode using natural ventilation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pit 2 Foundation beam (compartment wall) 3 Foundation bottom slab 4 Slab 5 Opening 6 Outside air intake duct 8 Air conditioner 9 Main duct 10 Return air duct

Claims (3)

[Claims] 1. A building thermal storage type air conditioner using a building body as a heat storage medium, wherein a pit formed in a foundation of the building is used as a chamber for taking in outside air, and the outside air taken in through the pit is provided. Is processed by the air conditioner and supplied to the room to be air-conditioned, and the air in the pit is processed and circulated by the air conditioner to perform the heat storage operation on the frame constituting the pit. A heat storage air-conditioning system with a skeleton. 2. An external air heat storage operation in which said pit is cooled by external air to store heat by natural ventilation or forced ventilation in said pit.
The air-conditioning equipment of the above-mentioned skeleton. 3. The interior of the pit is partitioned by a number of partition walls, and each partition wall is provided with an opening for outside air circulation,
A series of external air flow passages are formed in the pit by the partition walls and the openings, and the positions of the openings are set so that the external air flow passages meander. The air-conditioning equipment of the above-mentioned skeleton.