JPH0224072Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an improvement of a defrosting device in a refrigeration system, such as a freezer/refrigeration unit cooler.

Frost forms on the surface of the cooler in the unit cooler, and as this thickens, the cooling efficiency decreases, so an electric heater is attached to the cooler as a defrosting device. However, conventional devices do not take any measures to prevent natural convection of heat from the electric heater toward the freezer during defrosting. Therefore, the heat of the electric heater is
In addition to its defrosting effect, it also has the disadvantage of raising the temperature of the entire chamber. Furthermore, at the end of the defrosting action, the temperature inside the refrigerator must be lowered to the level before defrosting, which also results in wasted electricity.

The purpose of this invention is to eliminate the above-mentioned drawbacks.The idea is to form an insulating airflow around the cooler of the unit cooler only during defrosting, and this airflow allows the electric heater to be removed during defrosting. The heat generated is
This is intended to prevent waste of electricity by blocking the flow into the refrigerator.

Examples of this invention will be described below based on the drawings. A unit cooler 2 is provided on one side of the upper part of a freezer 1, and an air blowout window 4 is opened in the upper front of the main body 3, and an intake window 5 is opened in the lower part. A cooler 7 with an electric heater 6 for defrosting is attached to the center of the main body 3, and a cooling fan 8 is provided above the cooler 7. The fan 8 sucks the air in the refrigerator through the suction window 5, exchanges heat with the cooler 7 to cool it, and then
Air is forcibly blown out from the blow-off window 4 toward the inside of the refrigerator. 9 is a motor that drives the fan 8. An air duct 10 is installed along the inner wall of the main body 3, and a blower 11 is disposed within the air duct 10 to form an air flow 12 around the cooler 7. The blower 11 is set to be driven simultaneously when the electric heater 6 is energized, and to stop when the energization is cut off.
Portions corresponding to the blow-off window 4 and the suction window 5 are made into openings 13 and 14, and an air curtain 17 with one end of the air duct 10 serving as an air blow-out port 15 and the other end serving as an air suction port 16 is stretched. 18 is a drain connection port.

Next, the operation of this device will be explained. First, cooler 7
When frost forms on the surface and thickens, defrosting begins. To defrost, the compressor (not shown) and the cooling fan 8 are stopped, and then the electric heater 6 is energized to heat it. This operation is performed using a timer (not shown).
Automatically by. The blower 11 is driven at the same time as the electricity is turned on. When the blower 11 is driven, an air flow 12 in the direction of the arrow is formed within the air duct 10, and at the same time, an air curtain 17 is stretched over the openings 13 and 14 corresponding to the blowout window 4 and the suction window 5.
The air curtain 17 blows out from the air outlet 15,
It is formed by air flowing into the air suction port 16. Since the air flow 12 including the air curtain 17 has a heat insulating effect, this generation causes the electric heater 6 to
The heat is prevented from flowing into the refrigerator, and the heat remains within the main body 3. Therefore, the heat from the electric heater 6 effectively defrosts the cooler 7 and does not raise the temperature inside the refrigerator unlike the conventional device. The melted frost is discharged from the main body 3 through the drain connection port 18. As defrosting progresses and the temperature of the cooler 7 rises, a thermostat (not shown) for terminating defrosting is activated.
Turn off the power to the electric heater 6. When the power is cut off,
The compressor and cooler 7 begin to operate. Then, the blower 11 stops operating, the air flow 12 and the air curtain 17 disappear, and the cold air flows into the warehouse again to start the cooling action.

As explained above, this idea creates an airflow around the cooler of the unit cooler that is generated only during defrosting, and this airflow allows the heat generated from the electric heater for defrosting to flow into the refrigerator. This was done to prevent the influx. As a result, defrosting is performed efficiently, and at the same time, it eliminates the waste of raising the temperature inside the refrigerator during freezing, which is the case with conventional devices, resulting in a significant energy-saving effect in terms of energy savings. .

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a unit cooler of this invention. 1... Freezer, 2... Unit cooler, 3...
Main body, 6... Electric heater, 7... Cooler, 10...
...Air duct, 11...Blower, 12...Air flow, 17...Air curtain.

Claims (1)

[Scope of utility model registration request] Main body 3 of unit cooler 2 installed in freezer 1
An air duct 10 is installed along the inner wall of the main body 3, and a blower 11 is placed inside the air duct 10 to form an air flow 12 that flows only during defrosting. Air outlet window 4,
In addition to providing an intake window 5 at the lower front, both windows 4 and 5
A defrosting device for a unit cooler is provided with an air curtain 17 having one end of an air duct 10 serving as an air outlet 15 and the other end serving as an air suction port 16 over openings 13 and 14 corresponding to the respective openings 13 and 14.