JPS61153365A - Heat exchanger for ice heat accumulation type cold storage - 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 "Field of Industrial Application" The present invention relates to an ice storage type cold needle R storage heat exchanger.

``Conventional technology'' Conventional ice thermal storage type low-temperature storage has an ice-making pit inside the storage, and uses a refrigerator to turn the water in the ice-making bit into ice late at night when electricity is cheap, and uses this cold storage thermal energy to lower the temperature inside the storage. The heat exchanger installed inside the refrigerator is of a type that circulates only cold water.

"Problem to be solved by the invention" In the above case, it is good when there is plenty of cold storage thermal energy in the ice making pit, but it is used up from daytime to late at night, and the cooling effect inside the icebox decreases. There is a problem with doing so.

The present invention provides a heat exchanger that makes it possible to maintain a high internal cooling effect even when the cold storage thermal energy in the ice making bit decreases.

A heat exchanger of the present invention includes a fan that generates a unidirectional air flow from an air intake port to an air outlet, and a fan that generates a unidirectional air flow from an air intake port to an air outlet, and a It has two systems of heat exchange pipes located on the upstream and downstream sides of the air flow in the flow path, and the upstream heat exchange pipe receives cold water from a cold water source, and the downstream pipe receives cold water from a cold water source. The heat exchange pipe is designed to be supplied with prine from the refrigerator.

"Example" An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a heat exchanger according to an embodiment, and numeral 1 in the figures is a casing. Casing l has upper plate 1& and lower plate 1b
are arranged at intervals, and the lower plate 1bK has a plurality of air intake ports 2,
Air outlet ports 3 are provided on both side surfaces between the upper plate l& and the lower plate 1b, and the space between the upper plate l& and the lower plate It) serves as an air flow path. The air intake port 2 is equipped with a fan 5 driven by a motor 4 attached to the upper plate l and the lower surface, and when the fan 5 is driven, the air intake port 2
The air taken in from the outlet flows in one direction as shown by the arrow toward the air outlet 3, and is sent out from the outlet 3 to the outside.

Two systems of heat exchange pipes are arranged in the flow path through which the air flows as follows. That is, the upstream side (air intake port 2 side) K of the air flow is provided with a heat exchange vibro for passing cold water, and the downstream side (air discharge port 3 side) IC is provided with a heat exchange pipe 7 for passing the prine. It is. These heat exchange vibros and 7 heat exchange vibros are arranged on the same cross section of the air flow path, and here, the flowing air and the heat exchange vibros, 7
Heat exchange with the fluid inside is done effectively. Further, each heat exchange vibro, 7, is concentrated in a header for each system, and each system has a 51C connection to the cold water circulation system and the line circulation system VC. Reference numerals 8 to 11 are connection ports for this purpose, 8 is a pline inlet connection port, 9 is a pline outlet connection port, 10 is a cold water inlet connection port, and 11 is a cold water outlet connection port.

Next, an ice thermal storage type in-rock low temperature storage to which this heat exchanger is applied will be explained.

Figure 3 shows the entire four components of the storage, and the reference numeral 12 in the figure shows
is between the inner walls of the bedrock, which is the storage area. This bedrock space 1
An ice making pit) 13 is provided inside the container 2, and a heat exchanger m1s14 of the present invention is provided on the ceiling inside the container. The ice making pit 13 and the heat exchanger 14 are provided with buttons so that prine is supplied from a refrigerator 15 provided outside the rock space 12. 16 is the Prine circulation system, and the route 16 passing through the ice making pit) 13 and the route passing through the heat exchanger 14) 16b are connected in parallel to this circulation system 16 PHC, and the outgoing routes of both routes 16m and 16b are connected in parallel. Valves 17 and 18 are provided for opening and closing. The water in the pit 13 is turned into ice by circulating the prine to the ice making pit 13 by the pump 191C, and the storage a is cooled by circulating the pline to the heat exchanger 14.

Further, a cold water circulation system 20 is provided between the ice making pit 13 and the heat exchanger 14 for supplying the cold water in the water permeable pit 1 to the heat exchanger 14. 21 is a pump in the same system. In addition, the amount of ice in ice making pit) 13 is 10% of the total.
% to 30%, and the remaining cold water is circulated.

This ice thermal storage is operated as follows.

Usually, late at night when electricity is cheap, the refrigerator 15 is operated, valve 17 is opened, and valve 18 is closed to make ice cubes)13! Ice is made until a predetermined amount of ice is reached. Here, if the temperature inside the refrigerator reaches the set temperature (20 to 3 degrees Celsius) or higher, the cold water in the ice making pit 13 may be supplied to the heat exchanger 14 to cool the inside of the refrigerator. 17 is closed, valve 18 is opened to temporarily stop ice making, and the prine is supplied to the heat exchanger 14 to cool the inside of the refrigerator with the prine.

During the day, the cold water stored in the ice making bit 13 as ice is used to supply the cold water in the ice making bit 13 to the heat exchanger 14 to cool the inside of the refrigerator. Therefore, during the daytime when electricity prices are high, the refrigerator
By the way, during the transition from daytime to late night, the cold storage thermal energy in the ice making pipe 13 may be used up. In such a case, even if the cold water in the ice-making bit 13 is circulated through the heat exchanger 14, the inside of the refrigerator cannot be kept at a low temperature because the temperature of the cold water is not low. Therefore, in such a case, or if high-temperature stored items are placed in the refrigerator, the circulation of cold water is stopped, the refrigerator 15 is operated, and the valve 17 is turned on.
is closed, valve 18 is opened to supply pline to heat exchanger 14, and the inside of the refrigerator is directly cooled by pline.

As a result, the inside of the refrigerator is rapidly cooled down to a constant low temperature (
20-3℃)K is maintained.

In the heat exchanger 14, as shown in Figs. 1 and 2, air is taken in from the lower center as shown by the arrow and is discharged from the narrow side as cooling air, so the cold air flows into the refrigerator along the walls. Wander. In addition, when directly cooling the pline by supplying it to the heat exchanger 14, there is a concern that the cold water in the other heat exchange vibro may freeze. There is no risk of this happening because it is placed downstream of the airflow from the cold water heat exchange vibro.

"Effects of the Invention" As explained above, the heat exchanger of the present invention can exhibit a cooling effect even when supplied with either prine or cold water. In the low-temperature storage R, backup operation can be performed by supplying prine even when the temperature of the cold water becomes high and a cooling effect cannot be expected. In addition, when the prine is supplied directly to the heat exchanger, a high cooling effect can be achieved, making it possible to perform emergency cooling when the temperature inside the refrigerator rises, making it possible to maintain the inside of the refrigerator at a constant low temperature. .

In addition, since the heat exchange pipe through which the cooling water flows is arranged on the upstream side of the airflow from the heat exchange pipe for the plines, the cold water does not freeze inside the pipes during the cooling operation using the plines.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a heat exchanger according to an embodiment of the present invention, and FIG.
The figure is a view taken along arrow H-1 in FIG. 1, and FIG. 3 is an overall configuration diagram of an ice heat storage type low-temperature storage rhinoceros in rock using the heat exchanger of the present invention. l...Casing, 2...Air intake, 3...Air outlet, 5...Fan,
6... Heat exchange pipe for cold water, 7... Heat exchange pipe for prine, 14... Heat exchanger of the present invention.

Claims (1)

[Claims] A fan that generates a unidirectional air flow from the air intake to the air outlet, and a fan located in the air flow path between the air intake and the air outlet on the upstream and downstream sides of the air flow, respectively. The ice cream has two systems of heat exchange pipes arranged, and the upstream heat exchange pipe is supplied with cold water from a cold water source, and the downstream heat exchange pipe is supplied with prine from a refrigerator. Heat exchanger for thermal storage type cold storage.