JPS61140764A - Freezing device for heat exchange - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology belongs to the technical field of heat exchange devices used for cooling cold water in air conditioners.

Accordingly, the invention of this application is such that piping for a freezing refrigerant such as an ethylene glycol solution is provided in a heat exchange tank, and each pair of the refrigerant piping is integrated at a longitudinal side surface to form a unit. The invention relates to a heat exchange freezing device in which the heat exchange tank is connected to an air conditioner through a cold water circulation circuit, and in particular, each pair of refrigerant pipes meander in a plane within the heat exchange tank. or arranged in a coiled manner,
and the upstream side of the first refrigerant pipe of the pair of refrigerant pipes is the second refrigerant pipe.
The invention relates to a heat exchange ice freezing device that is disposed on the downstream side of a refrigerant pipe, and the downstream side of the first refrigerant pipe is disposed on the upstream side of a second refrigerant pipe.

<Prior Art> As is well known, in recent years, residential houses, etc. are often equipped with various environmental devices to improve the living environment, and one of these environmental devices is an air conditioner for cooling. The demand is so great that it is even installed in private residences.It is a chilled water circulation type cooling air conditioner that has a large capacity, good heat exchange efficiency, and is easy to automatically control to effectively use electric energy day and night. equipment has been adopted.

The chilled water of the chilled water circulation type air conditioner is sent to the air conditioner from the heat exchange tank of the ice freezing device for heat exchange,
Heat exchange is performed with the air in the air conditioner, and the heated cold water is returned to the heat exchange tank.

The heat exchange tank is provided with piping through which a refrigerant such as ethylene glycol solution flows, and the heated cold water is cooled to the set temperature while being flush with the conventional heat exchanger. In the exchange freezing device, since the refrigerant pipes arranged in the heat exchange tank are arranged in the same flow direction of the refrigerant, the downstream side of the refrigerant pipes is The disadvantage is that the temperature is higher than that on the upstream side, creating a temperature gradient, which reduces the cooling efficiency of the heat exchange tank as a whole.Therefore, in order to lower the chilled water to the set temperature, the refrigerant must be rapidly circulated. This also had the disadvantage of being extremely uneconomical.

In addition, when the cold water around the refrigerant pipes in the heat exchange tank is frozen during low-load periods such as at night in preparation for high-load operation of the air conditioner, the freezing condition becomes uneven, causing problems during high-load operation of the air conditioner. Another drawback was that the cooling of cold water in the system was inefficient.

The purpose of the invention of this application is to solve the problems of the heat exchange freezing device based on the above-mentioned prior art, to efficiently exchange heat between cold water and refrigerant of an air conditioner, and to It is an object of the present invention to provide an excellent ice-freezing device for heat exchange, which uniformizes the freezing of cold water in the air, thereby benefiting the field of air conditioning technology application in the environmental equipment industry.

<Means/effects for solving the problem> In order to solve the above-mentioned problem, the structure of the invention of this application, which is based on the above-mentioned claims, is to solve the above-mentioned problem. Every two refrigerant pipes for cooling the cold water retained in the tank are made into a pair, and the longitudinal side surfaces of the refrigerant pipes are integrated into a single unit. The refrigerant pipes are arranged in a meandering manner, or arranged in a coiled manner, and further arranged so that the upstream side of the first refrigerant pipe of the pair of refrigerant pipes is the downstream side of the second refrigerant pipe. When the refrigerant flows through the refrigerant pipes, each refrigerant pipe has a uniform temperature distribution along its length, improving the cooling efficiency of the chilled water in the heat exchange tank, and also improving the cooling efficiency around each refrigerant pipe. Even when cold water is frozen, technical measures are taken to ensure that the frozen state is uniform, and as a result, heat exchange between the cold water and the air conditioner is performed efficiently.

<Embodiment - Configuration] Next, one embodiment of the invention of this application will be described as follows based on the drawings from FIG. 1 onwards.

In the flowchart shown in FIG. 1, 1 is a heat exchange freezing device, and a circulation circuit 5 for cold water 4 is formed between the heat exchange tank 2 of the heat exchange freezing device 1 and an air conditioner 3. In order to cool the cold water 4, a piping module 6.6 through which an ethylene glycol solution as a refrigerant flows is installed inside the heat exchange tank 2.

Furthermore, each piping module 6 for the refrigerant has a refrigerant cooler 7.
A circulation circuit is formed between the ethylene glycol solution and the refrigerant cooler 7, and the ethylene glycol solution is passed through the refrigerant circuit formed by the refrigerator 8, the evaporative condenser 9, and the refrigerant cooler 7.
Heat is exchanged and cooled.

Note that 10 is an aerator, which aerates the cold water 4 through piping installed in the heat exchange tank 2, and 11 is an expansion tank.

As shown in FIG. 2, each piping module 6 for the refrigerant has a supply header 13 and a return header 14 arranged as a pair at the upper left and lower right of the frame 12 in the figure, respectively. The supply header 13 and the return header 14 are located on the upstream and downstream sides of the refrigerant circulation circuit, respectively, and are connected to the refrigerant cooler 7.

Furthermore, the pair of refrigerant pipes 15 and 15' are brought into contact with their longitudinal sides to form a single unit, as shown in FIG.
The first refrigerant pipe 15 of the pair of refrigerant pipes is connected to the long ply header 13 at the lower right side of the figure, and is arranged to meander laterally on the vertical plane of the frame 12. The second refrigerant pipe 15' is connected to the return header 14 at the upper left in the figure, and the second refrigerant pipe 15' is connected to the return header 14 at the lower right in the figure, and is connected to the supply header 13 at the upper left in the figure. It is connected.

As shown in FIG. 3.4, a predetermined number of sets of refrigerant pipes 15, 15', which are integrated as described above, are arranged in parallel to each other at predetermined intervals on the frame 12.

<Embodiment - Effect> In the above configuration, the ethylene glycol solution as a refrigerant is cooled to a predetermined temperature in the refrigerant cooler 7, and is supplied to each supply of each piping module 6 of the ice freezing device 1 for heat exchange via piping. The ethylene glycol solution that is supplied to the header 13 and further flows into the supply header 13 on the lower right side of the figure in FIG. 2 flows through each first refrigerant pipe 15 and is sent to the return header 14 on the upper left side of the figure. The ethylene glycol solution is supplied and recycled to the refrigerant cooler 7 via the piping, and on the other hand, the ethylene glycol solution that has flowed into the supply header 13 at the upper left in the figure flows through each second refrigerant piping 15'. It is fed to the return header 14 at the lower right in the figure, and recycled to the refrigerant cooler 7 in the same manner as described above.

Therefore, the flow direction of the ethylene glycol solution is reversed between the first refrigerant pipe 15 and the second refrigerant pipe 15' which are integrated into one unit, and there is a gap between the ethylene glycol solution and the cold water 4 in the heat exchange tank 2. Even when heat is exchanged between the refrigerant pipes 15 and 15' and a temperature gradient occurs along the length of each refrigerant pipe 15 and 15', the refrigerant pipes 15 and 15' that are unitized and in contact with each other exchange heat with each other. The refrigerant pipes 15, 15' have a uniform temperature distribution in the longitudinal direction, and no temperature gradient as described above occurs.

Furthermore, since the first refrigerant piping 15 and the second refrigerant piping 15' are regularly and densely arranged in each piping module 6, the refrigerant is not distributed in each part of the heat exchange tank 2. The temperature distribution around the piping is made uniform, and as a result, the heat exchange tank 2
The cold water 4 is cooled very efficiently inside.

Also, when freezing the cold water 4 in the heat exchange tank 2 to store cold heat when the consumption of the cold water 4 decreases at night, etc., the temperature distribution in the heat exchange tank 2 is changed as described above. As the amount of water is equalized, freezing occurs uniformly around each refrigerant pipe 15, 15', and therefore, the freezing state in the heat exchange tank 2 becomes uniform, and even if the consumption of chilled water 4 increases, cold water 4
is cooled extremely efficiently using the melting heat of the ice in the heat exchange tank 2.

The cold water 4 cooled as described above is sent from the heat exchange tank 2 to the air conditioner 3 via the circulation circuit 5, and is subjected to heat exchange with the air in a predetermined manner. 2 will be recycled.

<Other Examples> Note that the embodiments of the invention of this application are of course not limited to the above-mentioned embodiments.
A pair of refrigerant pipes consisting of refrigerant pipes are not on a vertical plane,
It may be arranged in a meandering manner on a horizontal plane, or
Various embodiments can be adopted, such as the pair of refrigerant pipes may be arranged in a coil shape within the heat exchange tank.

Furthermore, it goes without saying that the refrigerant is not limited to ethylene glycol solution.

Furthermore, it is also possible as an application example of the present invention to make one refrigerant pipe meander or the like within one plane and arrange the folded refrigerant pipes close to each other in the heat exchange premises.

<Effects of the Invention> As described above, according to the invention of this application, each pair of refrigerant pipes disposed in the heat exchange tank of the ice freezing device for heat exchange is integrated into one unit on the longitudinal side surface, and By disposing the upstream side of the first refrigerant pipe of the refrigerant pipe on the downstream side of the second refrigerant pipe and reversing the flow direction of the refrigerant flowing through the first refrigerant pipe and the second refrigerant pipe, each The temperature distribution in the longitudinal direction of the unitized refrigerant piping is made uniform, and as a result, the temperature distribution in the heat exchange tank is made uniform, which greatly improves the cooling efficiency of the chilled water of the heat exchange freezing device. This is an excellent effect.

In addition, as mentioned above, by making the temperature distribution in the heat exchange tank uniform, even when freezing the cold water around the refrigerant pipes, the frozen state in the heat exchange tank is made uniform, and as a result, the heat Even when chilled water is cooled using the melting heat of ice in the exchange tank, an excellent effect is achieved in that extremely efficient heat exchange can be performed.

Furthermore, by arranging each pair of refrigerant pipes in the heat exchange tank in a planar meandering manner or in a coiled manner, the refrigerant pipes are arranged in a heat exchange tank. It is possible to provide an ice-freezing device for heat exchange which can be arranged extremely densely in a small installation space and has a large heat exchange capacity in spite of a small installation space.

Furthermore, as described above, since the heat exchange between the chilled water and the refrigerant is performed efficiently, the air in the air conditioner is effectively cooled by the chilled water, which is therefore economical. This excellent effect is also produced.

[Brief explanation of drawings]

The drawings show one embodiment of the invention of this application, and FIG. 1 is a schematic flowchart of the usage of the ice freezing device for heat exchange, FIG. 2 is a front view of the main parts of the freezing device for heat exchange, and FIG. Figure 2■-
■A view taken from the arrow, and FIG. 4 is a view taken from the ■-■ arrow of FIG. 3...Air conditioner, 5...Cold water circulation circuit, 2
...Heat exchange tank, 15.15'...Refrigerant piping, 1.
...Icing device for heat exchange, 15...First refrigerant pipe, 1
5'...Second refrigerant pipe

Claims (3)

[Claims] (1) Refrigerant pipes for freezing are arranged in a heat exchange tank in which a cold water circulation circuit is formed between the air conditioner and each pair of the refrigerant pipes is integrated into a unit on the longitudinal side. A replacement ice freezing device, wherein the upstream side of the first refrigerant pipe of each pair of refrigerant pipes is disposed downstream of the second refrigerant pipe. (2) Refrigerant pipes for freezing are arranged in a heat exchange tank in which a cold water circulation circuit is formed between the air conditioner and each pair of the refrigerant pipes is integrated into a unit on the longitudinal side. In the replacement ice-freezing device, each of the pair of refrigerant pipes is arranged in a planar meandering manner within the heat exchange tank, and the upstream side of the first refrigerant pipe of the pair of refrigerant pipes is a second refrigerant pipe. An ice freezing device for heat exchange, characterized in that it is disposed on the downstream side of. (3) Refrigerant pipes for freezing are arranged in a heat exchange tank in which a cold water circulation circuit is formed between the air conditioner and each pair of the refrigerant pipes is integrated into a unit on the longitudinal side. In the replacement ice-freezing device, each pair of refrigerant pipes is arranged in a coil shape inside the heat exchange tank, and the upstream side of the first refrigerant pipe of the pair of refrigerant pipes is the downstream side of the second refrigerant pipe. An ice freezing device for heat exchange, characterized in that it is disposed in.