KR19980017688A - Regenerative defroster of refrigerator - Google Patents

Abstract

The present invention relates to a heat storage defrosting apparatus using a heat discharge from a compressor of a refrigerator. Although a cooling fan is installed to dissipate heat of a refrigerant compression compressor, a heat dissipation effect of the compressor is low and a separate heat source is required to remove the cooler defrost. In order to solve the problem of low energy efficiency, the cooling oil of the compressor is circulated to store heat in the heat storage tank and to remove the frost of the cooler as heat stored in the heat storage tank.

Description

Regenerative defroster of refrigerator

[Purpose of invention]

It is an object of the present invention to provide a heat storage defrosting apparatus of a refrigerator in which the heat generated during the operation of the compressor is stored to remove the frost of the cooler as the stored heat, thereby increasing the cooling effect of the compressor and reducing the defrost energy.

[Technical Field to which the Invention belongs and Prior Art in the Field]

The present invention relates to a defrosting device installed to remove the cooler defrost of the refrigerator, and more particularly to a heat storage defrosting device of the refrigerator to store the heat generated during the operation of the compressor in the heat storage tank to use the defrost of the cooler. It is about.

In a refrigerator having a freezer compartment and a refrigerating compartment, the freezer compartment forms a cooler chamber at the rear thereof and installs a cooler therein so that the cold air generated by the cooler is supplied to the freezer compartment and the refrigerating compartment by the upper freezer compartment and the refrigerating compartment fan. One is common.

In such a refrigerator, a compressor, a condenser, a capillary tube, a cooler, and a gas-liquid separator are sequentially connected to each other via a refrigerant pipe, thereby forming a refrigeration cycle of the refrigerator.

Among them, the compressor and the condenser are installed in the machine room of the refrigerator, and one side of the compressor cooling fan is installed separately to operate simultaneously when the compressor is operated to cool the heat of the compressor and the condenser.

The cooler and the gas-liquid diverter are installed in the cooler chamber at the rear of the refrigerating chamber, and a glass tube heater for defrosting the cooler is usually installed below the cooler.

Some of their wired cord heaters can be installed side by side with the coolant tubes or addressed to the back of the cooler to remove the frost from the cooler.

In the conventional refrigerator, the cooling fan is operated to release the heat of the compressor by operating the cooling fan. However, since the cooling is performed together with the condenser, there is a problem that the heat dissipation effect of the compressor is not sufficient. There has been a problem that the power consumption by the defrost heater operation is large when removing.

The present invention is designed to improve the cooling method of the compressor and to improve the cooling effect of the compressor and to reduce the defrost energy by allowing the energy of the defrost heater to use the heat generated during the operation of the refrigerator.

1 is a rear configuration diagram of a refrigerator showing a defrosting device according to an embodiment of the present invention;

Figure 2 is a rear view of the refrigerator showing the defrosting apparatus according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

1 ... Compressor 2 ... Oil Circulation Pump

3 ... 3 way valve 4 ... heat storage tank

5.Oil cooler 6. Defroster

10 ... Cooler

In order to solve this problem, the present invention is a heat storage defrosting device using heat storage of the compressor to accumulate the heat of the compressor, the compressor, condenser, capillary tube, cooler and gas-liquid separator are connected in sequence through the refrigerant pipe to constitute a refrigeration cycle and In the refrigerator, the operation is controlled by the control unit according to the detection signal of the sensor, the refrigerator comprising: an oil circulation pump for circulating the cooling oil of the oil-cooled compressor of the refrigerator, a heat storage tank for storing the heat discharged from the compressor, and a freezer compartment A regenerative defrosting device comprising a defrosting pipe for removing defrost of the cooler and a valve means for selectively sending the oil discharged from the oil circulation pump to only one of the heat storage tank or the defrosting pipe is connected through an oil pipe. It is characterized by.

In addition, the heat storage defroster of the present invention is characterized in that an oil cooler for cooling the oil flowing into the compressor between the heat storage tank and the compressor in addition to the above-described configuration.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention will be described in more detail.

1 is a configuration diagram of a heat storage device and a defrosting device on the back of a refrigerator according to a first embodiment of the present invention.

An oil-cooled compressor 1 is provided in the machine room 20 at the lower side of the figure, and a heat storage tank 4 is provided at one side thereof.

An oil circulation pump 2 and a three-way valve 3 are installed between the compressor 1 and the heat storage tank 4 installed in the mechanical type 20 and connected to the oil pipe 12.

On the rear side of the freezer compartment, a cooler 10 is installed in the cooler chamber, and a cord heater defrosting tube 6 is spread up and down along the back of the cooler 10 at the rear thereof, and oil is filled therein.

One side of the defrost pipe (6) is connected to the oil circulation pump (2) through the three-way valve (3), the other side is connected to the heat storage tank (4) by the oil pipe (12).

And a check valve 13 is provided in the oil pipe 12 between the defrost pipe 6 and the heat storage tank 4 to prevent oil from flowing back to the defrost pipe (6).

Further, a freezer compartment fan 8 for freezing compartment cold air supply and a refrigerating compartment fan 9 for refrigerating compartment cold air supply are provided above the cooler 10 in the chiller chamber.

Such a heat storage defroster of the present invention, when the temperature of the freezer compartment rises above a certain temperature, the refrigeration control unit such as a microcomputer to operate the cooling system to supply cold air to the freezer compartment in response to the signal of the temperature sensor of the refrigerator compartment, the freezer compartment fan ( 8) Compressor cooling fan (not shown) and oil circulating pump (2) operate simultaneously with the operation of the compressor (1), the valve on the heat storage tank (4) side of the three-way valve (3) is opened and the defrost pipe (6) side It is closed.

Therefore, the cooling oil heated by the heat dissipation of the compressor 1 according to the operation of the compressor 1 flows into the heat storage tank 4 through the three-way valve 3 by the pump 2 and is in the heat storage tank 4. The heat exchanged oil in the compressor flows into the compressor (1) side, and the oil forms a cooling cycle of the compressor (1) through the oil pipe (12) in the order of the oil circulation pump (2), the heat storage tank (4), and the compressor (1). It continues to circulate until the temperature falls below a certain temperature to directly cool the compressor (1) and the oil in the heat storage tank (4) is gradually heated.

That is, as the oil in the heat storage tank 4 is heated, the cooling heat of the compressor 1 is accumulated.

Apart from the above, the conventional compressor (1) cooling fan is to cool the condenser and the compressor (1) outside on one side of the compressor (1) and at the same time to prevent overheating of the cooling oil.

During operation of the cooling system, when the temperature of the freezing chamber drops and falls below a certain temperature by supplying cold air into the freezing compartment by the freezing compartment fan 8 on the upper side of the cooler 10, the operation of the cooling system is stopped. This operation is stopped and at the same time the operation of the cooling fan and the oil circulation pump 2 is stopped.

On the other hand, when removing the frost formed on the cooler 10 by the detection signal of the frost sensor installed in the cooler 10, the control unit of the refrigerator operates the oil circulation pump (2) and at the same time the heat storage of the three-way valve (3) The tank 4 side is closed and the valve on the defrost pipe 6 side is opened.

Accordingly, the oil in the heat storage tank (4) heated by the heat generated during operation of the compressor (1) is passed through the compressor (1) by the oil circulation pump (2) and the three-way valve (3) Through the defrosting pipe (6) that is introduced to the rear of the cooler (10) through the heating the cooler (10) and the cooled oil is returned to the heat storage tank (4) oil circulation pump (2), defrost pipe (6), The heat storage tank 4, the compressor (1) in order to form a defrost cycle is to circulate until the defrost of the cooler (10).

After defrosting the cooler 10, the oil is also cooled by heat exchange with the cooler 10 to fall below a predetermined temperature, and then the cooling system is operated to act as the oil for cooling the compressor 1 as described above when the compressor 1 is operated. Done.

As such, the present invention circulates the oil-cooled compressor (1) cooling oil during the operation of the compressor (1), thereby cooling the compressor (1) and the heat dissipation by the conventional inner music fan, and the compressor (1) can increase the heat dissipation effect. In addition, by storing the heat generated by the compressor (1) in the heat storage tank (4) to be utilized in the cooler (1) defrost to reduce the defrosting on the defrost.

Hereinafter, another embodiment of the present invention will be described.

2 is a view showing a second embodiment of the present invention, in which the same parts as in FIG.

In FIG. 2, in order to increase the cooling efficiency of the compressor 1, the oil cooler 5, for example, the oil pipe 12 is closely spaced between the heat storage tank 4 and the compressor 1, and cooled on one side thereof. As the fan is installed, the compressor cooling fan only cools the condenser.

When the inside of the freezer compartment rises above a certain temperature and the cooling system is operated to supply cold air into the freezer compartment, the freezer compartment fan 8 and the compressor 1 operate. At the same time, the oil pump 2 and the oil cooler 5 operate. Only the valve on the heat storage tank 4 side of the three-way valve 3 is opened.

Therefore, the cooling oil heated by the compressor 1 discharged by the operation of the compressor 1 flows into the heat storage tank 4 through the three-way valve 3 by the oil circulation pump 2 and radiates heat as it heats. The oil in the heat storage tank 4 flows into the oil cooler 5 to cool, and then flows into the compressor 1 to cool the compressor 1 itself.

Therefore, the compressor (1) cooling cycle consists of the oil circulation pump (2), the heat storage tank (4), the oil cooler (5), the compressor (1) in order, the oil heated in the compressor (1) heat storage tank (4). After the heat exchange in the heat exchange cycle is cooled again in the oil cooler (5) and heated in the compressor (1) again.

On the other hand, when removing the frost formed on the cooler 10 in accordance with the detection signal of the frost sensor installed in the cooler 10, the oil circulation pump (2) is operated and the heat storage tank (4) of the three-way valve (3) The side is closed and the valve on the defrost pipe 6 side is opened.

At this time, the oil cooler 5 is not operated.

Therefore, the compressor (1) passes through the oil cooler (5) in which the oil in the gaerodine heat storage tank (4) does not operate and the compressor (1) in sequence, and then the speech to the rear of the cooler (10) by the oil circulation pump (2). The defrosting pipe (6) is introduced to remove the frost by heating the cooler (10), and the cooled oil returns to the heat storage tank (4) to form a defrost cycle.

On the other hand, in the drawing shown in the embodiment of the present invention is shown that the defrost pipe 6 is installed on the rear of the cooler, it is easy to install the defrost pipe 6 side by side along the refrigerant pipe 11 of the cooler 10 easily. I can understand.

In addition, the heat storage tank 4 adopted in the present invention is simply configured as an oil tank, but is not limited thereto, and the heat storage tank 4 itself is formed of an appropriate heat storage agent, and the oil pipes are regularly regularly spoken therein to provide the heat storage agent. It will be readily understood that it is possible to regenerate the heat of release of the compressor 1 by allowing the and oil to exchange heat.

As described above, the heat storage defroster of the refrigerator of the present invention connects a valve for circulating cooling oil of a compressor of a machine room of a refrigerator, a heat storage tank for storing heat of the compressor, and a defrost pipe installed at the rear of the cooler with an oil pipe. It is configured to circulate the cooling oil of the compressor to store the heat of the compressor in the heat storage tank and to remove the frost of the cooler as the stored heat, thereby increasing the compressor cooling efficiency as well as the defrost energy savings.

Claims (4)

An oil circulation pump (2) for circulating cooling oil of the oil-cooled compressor (1) of the refrigerator, A heat storage tank 4 for storing heat of oil heated to a high temperature in the compressor 1, Defrost pipe (6) is installed to remove the defrost of the cooler (10) on the back of the freezer compartment, Valve means (3) for selectively sending only the heat storage tank (4) or the defrost pipe (6) to discharge the oil discharged from the oil circulation pump (2) is characterized in that it is configured to be connected through the oil pipe Regenerative defroster of the refrigerator. The method of claim 1, The heat storage defrosting apparatus of the refrigerator, characterized in that an oil cooler (5) is further installed between the heat storage tank (4) and the compressor (1). The method of claim 1, The defrosting pipe (6) is installed in the rear of the freezer rear cooler (10) or the heat storage defrosting apparatus of the refrigerator, characterized in that side by side along the refrigerant pipe of the cooler (10). The method of claim 1, A check valve (3) is installed at the proper position of the oil pipe connecting the defrost pipe (6) and the heat storage tank (4) to prevent the oil of the heat storage tank (4) from flowing back to the defrost pipe (6) side. Regenerative defrosting device for refrigerators.