JP2000046454A - Mechanism for preventing leakage of hot air during defrosting operation of cooler for refrigerated warehouse, freezing warehouse and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent hot air within a cooler from being leaked into a warehouse by a method wherein an operation of a cooler fan during defrosting operation is stopped and a wind pressure-operated type check damper is closed. SOLUTION: This hot air leakage preventing mechanism is constructed such that air pressure operating type check dampers 6, 7 are arranged at a blowing- out port 4 and a suction port 5 of a cooler 1 so as to prevent leakage of hot air. In this case, the suction port side is provided with a hood 8, thereby even if a partial hot air flowed from the wind pressure operating type check damper is leaked, it is possible to accumulate a partial hot air and to prevent it from being dispersed into a warehouse.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for preventing hot air from leaking at the time of defrosting of a cooler for a refrigerated warehouse, a frozen warehouse or the like.

[0002]

2. Description of the Related Art Conventionally, in a refrigerated warehouse or a frozen warehouse,
It is cooled by a cooler installed in the warehouse,
Since frost gradually adheres to the surface of the air cooling coil of the cooler and the cooling efficiency is reduced, it is necessary to perform a defrost operation as needed to defrost and remove the frost.

As a method for removing adhering frost, an electric heating method in which a cooler is stopped and an electric heater attached to an air cooling coil is operated, or a cooling coil in which a fan is stopped and a refrigerant circuit of the cooler is operated in reverse. There is a compressor hot gas heating method or the like in which is used as a heating side. However, whichever method is applied, the heat supplied to defrost the frost gradually accumulates in the cooler.

[0004]

Since a part of the hot air accumulated in the cooler leaks into the warehouse in this way, the quality of the stored goods in the warehouse often deteriorates. I was Therefore, the present invention has a simple configuration,
It is an object to solve such a problem.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention proposes to install a wind pressure operated check damper on the outlet side and the inlet side of the cooler.

The present invention further proposes providing a hood on the suction port side.

According to the present invention, when the operation of the fan of the cooler is stopped at the time of defrosting, the wind pressure is not applied, and the wind pressure operated check damper is closed, so that the hot air in the cooler leaks into the warehouse. Can be prevented. Since the air pressure operated check damper cannot be completely closed, hot air may leak from the upper part at the suction port side, but this can be retained in the hood.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are explanatory views showing an embodiment of a cooler to which the hot air leakage prevention mechanism of the present invention is applied. Reference numeral 1 denotes a cooler in which an air cooling coil 2 and a fan 3 are installed. Reference numeral 4 denotes an air outlet, and 5 denotes an inlet, which are provided with wind-pressure operated check dampers 6 and 7, respectively. The wind pressure operated check dampers 6 and 7 are configured to be opened when the fan 3 operates and closed when the fan 3 stops. A hood 8 is provided above the suction port 5.
Is installed.

In the above configuration, during normal operation of the cooler 1, the wind pressure operated check dampers 6, 7 are opened by the wind pressure of the fan 3, as shown in FIG. The air in the warehouse flowing into the cooler 1 through the damper 7 is cooled by the air cooling coil 2,
The air is blown into the warehouse from the air outlet 4 via the air pressure operation type check damper 6.

If frost adheres to the air cooling coil 2 by such an operation, the defrost operation of the cooler 1 is performed. As the method of the defrost operation, an appropriate method as described above can be applied. At this time, the operation of the fan 3 is stopped.

Then, since the wind pressure is not applied to the wind pressure operation type non-return dampers 6 and 7, they are closed respectively.
It is possible to prevent the hot air in the cooler from leaking into the warehouse. In addition, since the hot air does not leak from the cooler 1 and accumulates therein, the efficiency of defrost is increased and the required time is shortened.

Since the wind-operated check damper cannot completely shut off the flow of air, some of the hot air may leak from the upper part of the suction port 5 having a large opening area. However, the leaked hot air can be kept in the hood 8 and can be prevented from diffusing into the warehouse. Then, when returning to the normal operation, the hot air remaining in the hood 8 can flow into the cooler 1 from the suction port 5 through the air pressure operation type check damper 7.

[0013]

As described above, the present invention has the following effects. a. When the cooler is defrosted, hot air for defrost is not leaked into the warehouse. b. Therefore, it is possible to prevent a decrease in the quality of the stock in the refrigerator. c. The time required for the defrost operation can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a configuration of a cooler to which the present invention is applied in a state of a normal operation.

FIG. 2 is an explanatory diagram showing an embodiment of a cooler configuration to which the present invention is applied in a state during a defrost operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooler 2 Air cooling coil 3 Fan 4 Blow-out port 5 Suction port 6, 7 Wind pressure operation type check damper 8 Hood

Claims (2)

[Claims] 1. A mechanism for preventing hot air leakage at the time of defrosting of a cooler for a refrigerated warehouse or a refrigerated warehouse, wherein a wind pressure operated check damper is installed on an outlet side and an inlet side of the cooler. 2. A mechanism for preventing hot air from leaking at the time of defrosting of a cooler for a refrigerated warehouse or a freezing warehouse according to claim 1, wherein a hood is provided on the suction port side.