JPH063078A - Heat storage device - Google Patents

Abstract

PURPOSE:To improve heat storage efficiency in an air conditioner, wherein heat is stored utilizing dump power except at a peak load, by repeatedly heating or cooling heat medium which is circulated by a circulation pump through a heat exchanger. CONSTITUTION:In a heat storage device 100, there are disposed in a heat storage tank 1 a plurality of cylindrical heat storage vessels 3 of the water-sealed copper ampule type with part of each of the vessels being in contact with each other. And a cooler (evaporator) 5 and a heater (condenser) 7 are provided respectively adjacent to the top and the bottom of a group of the vessels 3 and a lower pipe 21 having an upward opening at its end is provided at the bottom of the tank 1 and the pipe 21 is connected to an upper pipe 25 having downwardly directed holes 31 through a conduit including therein a circulation pump 23. And during the time of heating (cooling), the heater 7 (cooler 5) is operated at night and the pump 23 is rotated normally (reversely) to heat (cool) the water in the vessels 3 by circulation of oil, thereby effecting heat storage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage device for storing heat using a so-called water-filled copper ampoule type tubular heat storage container.

[0002]

2. Description of the Related Art Generally, in an air conditioner or the like, electric power at the time of non-peak time is used to store heat in a heat storage device at night, and the heat stored in the heat storage device is used to perform daytime air conditioning, etc. Air conditioning systems that perform are known.

As a heat storage device used in a conventional air conditioning system of this type, for example, a heat capsule in which a heat storage material is enclosed is arranged inside a heat storage tank body, and a heat medium is passed through the heat capsule to retain the heat medium. It has been proposed that the stored heat be stored in the heat storage material of the heat capsule (JP-A-53-53).
55547).

[0004]

However, in the conventional structure, since the heat medium only passes through the gap between the heat capsules in one direction, there is a problem that heat cannot be sufficiently stored in the heat storage material in the heat capsules. is there.

Therefore, an object of the present invention is to provide a heat storage device capable of solving the problems of the above-mentioned conventional techniques and sufficiently storing heat.

[0006]

In order to achieve the above object, the present invention provides a plurality of tubular bodies in which a heat storage material is enclosed so that a part of their outer peripheries are in contact with each other inside the heat storage tank body. Heat exchange container to form a group of the heat storage container, and heat exchange for cooling or heating the heat medium on at least one of the inflow side or the outflow side of the heat medium in contact with the heat storage container of the group. And a circulation pump for circulating the cooled or heated heat medium in the lengthwise direction of the group of heat storage containers.

Further, according to the present invention, the outer diameter of some of the plurality of cylindrical heat storage containers is made thin, and a projection is provided on the outer periphery of the heat storage container formed to be thin. ,
It is characterized in that the heat storage container having the protrusion is arranged in a plurality of heat storage containers in a scattered manner.

[0008]

According to the present invention, the heat medium circulated by the circulation pump is repeatedly heated or cooled through the heat exchanger, and warm or cold heat is stored in the heat storage material in the heat storage container each time. Is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the heat storage device according to the present invention will be described below with reference to the accompanying drawings.

First, referring to FIG. 4, the air conditioning system will be described. For example, at night, heat is stored in the heat storage device 100 by using electric power at the time of non-peak hours, and the heat storage device 100 is stored.
In the daytime, the on-off valve 101,
102 is opened, the pump 103 and the fan 105 are driven, and the indoor heat exchanger 104 air-conditions the room to be conditioned.

Referring to FIG. 1, a heat storage device 100 has a heat storage tank main body 1, and inside the heat storage tank main body 1, a plurality of cylindrical heat storage containers 3, 3, ... 3 are provided.

These heat storage containers 3 are of a water-filled copper ampoule type and, as shown in FIG. 2, have a structure in which water 3c is sealed in a copper pressure container 3a while leaving an air layer 3b. As an example of the size of the copper pressure vessel 3a, the outer diameter is 19.05.
mm, inner diameter 17.05 mm, length 760 mm, water filling amount 15
6cc is included.

According to this, when heated, the temperature of the enclosed water exceeds the boiling temperature (100 ° C.) under atmospheric pressure and rises to about 250 ° C. By the way, 250
When the temperature reaches ℃, the heat storage amount reaches about 260 kcal / kg.

As shown in FIG. 3, the group of heat storage containers 3, 3, ... 3 are arranged so that a part of their outer peripheries are in contact with each other, and a gap 8 is provided between each heat storage container 3. A gap 8a provided between the heat storage container 3 and the heat storage tank body 1
Is narrow and the gap 8b between the heat storage containers 3 is twice as wide as the gap 8a, and a heat medium described later circulates between these gaps 8a and 8b.

A cooler (evaporator) 5 and a heater (condenser) 7 are provided on the upper side and the lower side of the group of heat storage vessels 3, 3, ... 3, respectively, and the cooler (evaporator) is provided. 5
4 is connected to a compressor 11, a condenser 12 and an electric expansion valve 13 through a pipe, and a heater (condenser) 7 is connected to a compressor 15, an evaporator 16 and an electric type through a pipe as shown in FIG. It is connected to the expansion valve 17. An electric heater can be used as the heater 7.

Further, referring to FIG. 1, at the bottom of the heat storage tank main body 1, there are installed lower pipes 21 each having an opening 30 at the end thereof, and the lower pipes 21 are connected to a circulation pump 23 through a pipeline. The circulation pump 23 has an upper pipe 25 having a plurality of downward holes 31 through a pipe line.
Connected to.

Thus, the heat storage tank body 1 is filled with oil (or brine) as a heat medium, and this oil is constantly circulated by the circulation pump 23 through the lower pipe 21 and the upper pipe 25. A medium that does not freeze itself is used as the heat medium.

Next, the operation of this embodiment will be described.

For example, the power outside the peak is used to store heat in the heat storage device 100 at night, and the heat stored here is used for air conditioning during the day.

To perform heating operation in this air conditioning system, referring to FIG. 5, first, the cooler 5 is stopped at night, and
By operating the heater 7 and further rotating the circulation pump 23 forward, the oil is circulated as indicated by the arrow. This oil is heated by the heater 7 during circulation and exchanges heat with the water 3c enclosed in the group of heat storage containers 3, 3 ... 3, thereby raising the temperature of the water 3c and storing heat therein. .

In the daytime, after stopping the operation of the circulation pump 23, the on-off valves 101 and 102 are opened, and as shown in FIG. 4, the pump 103 is operated to remove the heat medium heated at night from the indoor heat. It is sent to the exchanger 104 and the fan 105 is rotated to heat the room to be conditioned.

According to this embodiment, however, the heater 7
The oil heated by is immediately stored in a group of heat storage containers 3, 3 ... 3
The heat exchange is very efficient because it contacts the. Further, as described above, the heat storage container 3 is fully packed in the heat storage tank main body 1, and the heat storage amount of each of the heat storage containers 3 is considerably large. Significantly improved compared to the one. An electric heater may be used as the heater 7 used for heating the oil.

For the cooling operation, referring to FIG. 6, first, the heater 7 is stopped at night, the cooler 5 is activated, and the circulation pump 23 is rotated in the reverse direction, as shown by the arrow. Then circulate the oil. This oil is cooled by the cooler 5 during circulation and exchanges heat with the water 3c enclosed in the group of heat storage containers 3, 3 ... 3, to lower the temperature of the water 3c and store it there. .

In the daytime, after stopping the operation of the circulation pump 23, the on-off valves 101 and 102 are opened, and as shown in FIG. 4, the pump 103 is operated to remove the heat medium cooled at night from the indoor heat. It is sent to the exchanger 104 and the fan 105 is rotated to cool the inside of the conditioned room.

Also in this case, the oil cooled in the cooler 5 immediately contacts the group of heat storage containers 3, 3, ... 3 so that extremely efficient heat exchange is carried out, and the effect during heating operation is almost the same. The effect of is obtained. Although the circulation pump 23 is supposed to rotate in the reverse direction during the cooling operation, it does not necessarily have to rotate in the reverse direction, and may rotate in the forward direction as in the heating operation.

7 and 8 show another embodiment.

As shown in FIG. 7, a heat storage container 33 having an outer diameter slightly smaller than the outer diameter of the heat storage container 3 is provided, and the protruding portion 3 protruding in four directions is provided on the outer circumference of the heat storage container 33.
3a is provided, and the narrow heat storage container 33 having the protrusion 33a is, as shown in FIG.
It is arranged in a scattered manner between 3. According to this, as is clear from FIG. 8, the gap 8c between the heat storage container 3 and the heat storage container 33 is considerably wider than the gap 8a between the heat storage tank body 1 and the heat storage container 3, and Since the gap 8a spreads more than twice as much as the gap 8a, the flow rate of the heat medium passing therethrough increases, and the heat exchange efficiency can be improved as compared with the embodiment shown in FIG.

FIG. 9 shows another different embodiment. A ring 45 having a projection 45a protruding in three directions is fitted on the outer circumference of a heat storage container 43 having a slightly smaller outer diameter.
The narrow heat storage container 43 in which 5 is fitted is also arranged between the thick heat storage containers 3, 3. Also by this, the gap 8d can be considerably widened and the heat exchange efficiency can be improved.

[0029]

As is apparent from the above description, according to the present invention, a plurality of cylindrical heat storage containers in which a heat storage material is enclosed are arranged side by side inside the heat storage tank body, and these heat storage containers are arranged. A heat exchanger that forms a group and is provided on the inlet side or the outlet side of the heat medium that contacts the heat storage container of the group, and further that flows through the heat exchanger in the length direction of the heat storage container of the group. Since the circulation pump that circulates is provided, the heat medium cooled or heated by the heat exchanger circulates inside the main body of the heat storage tank, which improves the efficiency of heat exchange and can significantly improve the heat storage efficiency.

In addition, the outer diameter of some of the plurality of cylindrical heat storage containers is made smaller than the outer diameter of the other heat storage containers, and the outer circumference of the heat storage container is made thin. If a protrusion is provided in the heat storage container and the heat storage container having the protrusion is arranged in a plurality of heat storage containers, the gap between the heat storage containers becomes large, and therefore the heat storage efficiency can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a heat storage device according to the present invention.

FIG. 2 is a vertical sectional view of a heat storage container.

FIG. 3 is a sectional view showing an arrangement of a group of heat storage containers.

FIG. 4 is a circuit diagram showing an example of an air conditioning system using a heat storage device.

FIG. 5 is a perspective view showing the flow of oil during heat storage.

FIG. 6 is a perspective view showing the flow of oil during cold storage.

FIG. 7 is a view corresponding to FIG. 2 showing another embodiment.

FIG. 8 is a view corresponding to FIG. 3 showing another embodiment.

FIG. 9 is a view corresponding to FIG. 3 showing still another embodiment.

[Explanation of symbols]

 1 Heat Storage Tank Main Body 3 Heat Storage Container 5 Cooler 7 Heater 8 Gap 23 Circulation Pump 100 Heat Storage Device 104 Indoor Heat Exchanger

Claims (2)

[Claims] 1. A plurality of cylindrical heat storage containers in which a heat storage material is enclosed are arranged in parallel inside the heat storage tank main body with part of their outer peripheries in contact with each other to form a group of these heat storage containers. ,
A heat exchanger for cooling or heating this heat medium is provided on at least one side of the inlet side or the outlet side of the heat medium in contact with each heat storage container of this group, and the cooled or heated heat medium is A heat storage device comprising a circulation pump for circulating the heat storage container in the longitudinal direction. 2. The outer diameter of some of the plurality of cylindrical heat storage containers in which the heat storage material is enclosed is made smaller than the outer diameter of other heat storage containers, and the heat storage material is made thinner. The heat storage device according to claim 1, wherein a protrusion is provided on the outer periphery of the formed heat storage container, and the heat storage container having the protrusion is arranged in a plurality of heat storage containers.