JPS62141438A - Air conditioner - Google Patents

Abstract

PURPOSE:To improve the heat exchange efficiency at an air conditioner by a structure wherein the title unit consists of a take-out passage to take ice slurry out of a heat accumulator and a heat exchanger, at which the taken-out ice slurry and fed brine are indirectly heat-exchanged with each other. CONSTITUTION:A cooling means 6 or a means to cool brine fed to an air conditioner 3 by stored cold heat consists of a take-out passage 16 equipped with a pump 16a, which takes ice slurry out of a heat accumulator 5, a heat exchanger, at which the taken-out ice slurry and the fed brine are indirectly heat-exchanged with each other, and a return passage, through which the heat- exchanged ice slurry is sent back to the heat accumulator 5. When cooling is unnecessary or during the night and the like, a cold heat generator 1 is put into operation so as to manufacture the ice slurry at an ice plant 4. The manufactured ice slurry is conserved in the heat accumulator 5 so as to store cold heat. When cooling is required, the brine is cooled at a cooling device 2 by operating the cold heat generator 1 and the same time by the stored cold heat. Because some part of cooling is supplemented by the stored cold heat, the load on the cold heat generator 1 is reduced and consequently the miniaturization of the cold heat generator 1 is contrived.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an air conditioner used for cooling buildings such as hospitals, hotels, department stores, companies, offices, stores, etc. in whole or locally. The apparatus includes, in detail, a cold heat generating device, a cooling device that cools brine with the cold heat generated by the cold heat generating device, an air conditioner, and a brine supply path that supplies brine cooled by the cooling device to the air conditioner. , an ice making device that produces ice using the cold heat generated by the cold heat generating device; a heat storage tank that stores the ice produced by the ice making device and stores cold heat; and supplying the cold heat stored in the heat storage tank to the air conditioner. The present invention relates to an air conditioner provided with a cooling means for cooling brine.

[Conventional technology]

In this type of air conditioner, cold heat is stored in the heat storage tank by water storage, so the amount of heat stored per unit volume in the heat storage tank is large compared to the case where cold heat is stored by cold water storage, and the heat storage tank is large. If the heat storage capacity is the same, the amount of heat storage can be increased, and if the amount of heat storage is the same, the heat storage tank can be made smaller. In the conventional air conditioner of this kind, as shown in FIG. 2, the ice making device (4) has the cooling coil (1a) of the cold heat generating device inserted into the heat storage tank (5). Then, the brine (water) in the heat storage tank (5) is transferred to the cooling coil (1a).
Ice was made by freezing around the ice.

[Problem that the invention seeks to solve]

However, when using the conventional air conditioner, when the brine supplied to the air conditioner is cooled by the stored cold heat in the heat storage tank, the stored cold heat is extracted from the heat storage tank as cold water, and the supplied cold water is cooled by the extracted cold water. Become. In other words, the cooling means that cools the supply brine using stored heat and cold heat is
Cold water provides a means of cooling the feed brine.

In the heat storage tank, the cold water becomes zero due to the latent heat of the ice.
Although it is kept at a low temperature near ℃, when it is taken out from the heat storage tank to cool the supply brine, the temperature continues to rise due to the inevitable heat loss in the extraction path, and also in the supply brine, The temperature continues to rise due to unavoidable heat loss in the brine supply path from the cold water cooling section to the air conditioner.

Therefore, when using a conventional air conditioner, if the outlet path is shortened to suppress the rise in temperature of the cold water, the supply brine can be cooled to a low temperature with cold water in the cooling section, but the air conditioning As the brine supply path leading to the air conditioner becomes longer, the temperature rise of the brine increases, and as a result, although the brine is cooled to a low temperature, the temperature of the brine becomes high when it reaches the air conditioner. If the brine supply path from the air conditioner to the air conditioner is shortened to suppress brine temperature rise, the extraction path will naturally become longer and the temperature rise platform for cold water will become larger. Although the temperature rise is suppressed, the temperature of the brine becomes higher when it reaches the air conditioner.In both cases, the temperature difference in the air conditioner cannot be made large, and the heat exchange efficiency in the air conditioner is low. be.

An object of the present invention is to improve heat exchange efficiency in an air conditioner.

[Means for solving problems]

The characteristic configuration of the air conditioner according to the present invention is that the ice making device includes:
an ice slurry supply path for supplying the ice slurry produced by the ice maker to the heat storage tank; and a heat exchanger for indirectly exchanging heat between the removed ice slurry and the supplied brine. The effects and effects thereof are as follows.

[For production]

The ice making equipment produces ice slurry that can be transported through pipes, and this ice slurry is stored in a heat storage tank in slurry form to store cold heat, so the supplied cold heat is used to cool the supplied brine. As the cooling means, it is possible to employ a means of taking out ice slurry from the heat storage tank and cooling the supplied brine with the ice slurry. Therefore, even if the extraction path from the heat storage tank to the cooling section is long, by determining the amount of ice in the ice slurry according to the heat loss in the extraction path, ice can be kept even in the cooling section that cools the supply brine. The latent heat of ice can maintain the temperature of the ice slurry near 0°C. As a result, the brine supply path from the cooling section to the air conditioner can be shortened.
Even in the case where a configuration is adopted in which the temperature rise of the brine is suppressed before reaching the air conditioner after cooling, the brine can be cooled to a low temperature in the cooling section.

Moreover, since the means for cooling the supply brine with ice slurry is a means for indirectly exchanging heat between the ice slurry taken out from the heat storage tank and the supply brine using a heat exchanger, damage and clogging of piping caused by the supply of ice slurry can be avoided. It is possible to avoid damage and clogging of the brine supply path and air conditioner for performing the desired air conditioning caused by ice slurry by limiting it to the take-out path only, thereby reducing maintenance costs for damage and clogging caused by ice slurry. , it can be done advantageously in terms of work.

〔Effect of the invention〕

Therefore, according to the present invention, the brine supplied to the air conditioner is cooled by the cold heat stored in the heat storage tank so that the temperature of the brine in the air conditioner becomes low, and a sufficient temperature difference is ensured.
In addition to being able to perform efficient heat exchange in air conditioners,
It has become possible to perform maintenance advantageously while storing cold heat using ice slurry.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Figure 1, each apartment building is cooled individually,
This is a packaged air conditioner for cooling each floor or room within a building, and it consists of a cold heat generating device (1), a cooling device (2), and an air conditioner (3). , an ice making device (4), a heat storage tank (5), and a cooling means (6)
It is equipped with

The cold heat generating device (1) includes a compressor (7) that compresses refrigerant.
), a condenser (8) for condensing compressed refrigerant, and an expansion valve (9).
) and an evaporator (10) that evaporates the refrigerant at a low pressure. The condenser (8) is configured with a heat exchanger (88) equipped with a cooling fan (8a), and the evaporator (10) has a first heat exchanger (10Δ) and a second heat exchanger (10Δ) connected in parallel. It consists of a heat exchanger (IOB).

The cooling device (2) cools brine (water) with the cold heat generated by the cold heat generating device (1), and specifically, the cooling device (2) cools the brine (water) by using the cold heat generated by the cold heat generating device (1).
A) is configured by allowing indirect heat exchange between the refrigerant and brine.

The air conditioner (3) is connected to a pump (
A heat exchanger (38) that indirectly exchanges heat between the cooling brine supplied via the brine supply device (11) with a
3B). Moreover, the outlet of the heat exchanger (3A) and the brine inlet of the first heat exchanger (IOA) are connected by a brine return path (12). In other words, air is cooled by forced circulation of brine between the cooling device (2) and the air conditioner (3).

The ice making device (4) basically uses the second heat exchanger (IOB) of the cold heat generating device (1) as a cooling source, and generates ice slurry by indirect heat exchange between the refrigerant and ice making water. It consists of an ice maker (13) for producing ice, and an ice slurry supply path (14) equipped with a pump (14a) for supplying the ice slurry produced by the ice maker (13) to the heat storage tank (5). In other words, the heat storage tank (5) is connected to the ice maker W (4).
This system stores cold heat by storing the ice slurry produced in the process. And, the ice making device (4) is an ice making device (
13) and brine in the heat storage tank (5) are sucked up by a pump (15a) and supplied to the ice maker (13).

The cooling means (6) is a means for cooling the brine supplied to the air conditioner (3) with stored cold heat, and specifically,
A pump (16) takes out the ice slurry in the heat storage tank (5).
a); a heat exchanger (17) for indirect heat exchange between the removed ice slurry and the supply brine;
A return path (1) returns the ice slurry after heat exchange to the heat storage tank (5).
8).

(19) is an air exhaust path that discharges a part of the return air from the room to the outside by the action of the fan (8a) of the condenser (8), and (20) is an air intake path that takes in outside air. (21) is a heat exchanger that cools the intake air in the air intake path (20) by exchanging heat with the exhaust air in the air exhaust path (19).

The air conditioner configured as described above operates the cold heat generator (1) to operate the ice making device (
An ice slurry is produced in step 4), the produced ice slurry is stored in a heat storage tank (5) to store cold heat, and when cooling is required, the cold heat generator (1) is activated to fill the cooling bag M ( In step 2), the brine is cooled and the brine is cooled by the stored cold heat for air conditioning, and a part of the cooling during cooling can be supplemented by the stored cold heat, so the load on the cold heat generating device (1) is reduced. Downsizing of the cold heat generating device (1),
This allows for smaller capacity, which means lower costs.

[Brief explanation of drawings]

FIG. 1 is an air conditioning circuit diagram showing an embodiment of an air conditioner according to the present invention, and FIG. 2 is a schematic sectional view of main parts of a conventional example. (1)・・・Cold heat generating device, (2)・・・・・・
Cooling device, (3)...Air conditioner, (11)...
... Brine supply path, (4) ... Ice making device,
(5)... Heat storage tank, (6)... Cooling means, (13)... Ice maker, (14)...
・Ice slurry supply path, (16) ... take-out path, (
17) Heat exchanger.

Claims (1)

[Claims] a cold heat generating device (1); a cooling device (2) that cools brine with the cold heat generated by the cold heat generating device (1);
an air conditioner (3); and a brine supply path (1) that supplies brine cooled by the cooling device (2) to the air conditioner (3).
1), an ice making device (4) that produces ice using the cold heat generated by the cold heat generating device (1), and a heat storage tank (5) that stores the ice produced by the ice making device (4) and stores the cold heat. and a cooling means (6) for cooling the brine supplied to the air conditioner (3) with the stored cold heat of the heat storage tank (5), the ice making device (4) The cooling means ( 6), an air conditioner comprising a take-out passage (16) for taking out the ice slurry from the heat storage tank (5), and a heat exchanger (17) for indirectly exchanging heat between the taken-out ice slurry and the supplied brine.