JP2007100988A - Deicing device for refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deicing device for a refrigerator capable of removing ice in a short time by ejecting heated deicing water to an evaporator and melting ice attached to a surface of the evaporator by heat and removing the ice by the dynamic pressure of the injected deicing water even when thickness of ice attached to the evaporator is increased, and capable of removing the ice in a part separated from the evaporator by ejecting the deicing water. <P>SOLUTION: This deicing device for the refrigerator is integrally provided with a first water pipe 5 for supplying the deicing water from the outside, a heat exchange coil 3 heated while deicing water passes through it, a gas burner 4 for heating the heat exchange coil 3, a compressed gas cylinder 7 as fuel of the gas burner 4, a jet nozzle 8 for ejecting the heated deicing water, and a case for storing the heat exchange coil 3, the gas burner 4 and the compressed gas cylinder 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a deicing device for a refrigerator that removes ice adhering to an evaporator of the refrigerator using deicing water.

  As a conventional refrigerator, FIG. 2 of Patent Document 1 shows a structure in which high-temperature and high-pressure refrigerant is fed into an evaporator and ice attached to the surface of the evaporator is removed. The pipe branches into two from the outlet of the compressor 1 that compresses the refrigerant to high temperature and high pressure, and one of the pipes is connected to the condenser 3 via the first on-off valve 2. The outlet of the condenser 3 is connected to the evaporator 6 via the expansion valve 5. The other of the pipes branched at the outlet of the compressor 1 is connected to the evaporator 6 via the second on-off valve 13. The outlet of the evaporator is again connected to the compressor. A control unit 20 is provided that performs control to open the first on-off valve and close the second on-off valve during freezing, and to close the first on-off valve and open the second on-off valve during deicing. A condenser fan 9 is provided in the vicinity of the condenser 3 and blows air toward the condenser 3. Further, an evaporator fan 10 is provided in the vicinity of the evaporator 6 and blows air toward the evaporator 6.

In this case, in the refrigeration cycle of the refrigerator, the first opening / closing valve 2 is opened by the control unit 20 and the second opening / closing valve 13 is closed. 3 is sent. The refrigerant is cooled and liquefied by the condenser fan 9 and adiabatically expands in the evaporator 6 through the expansion valve 5 and the refrigerant is vaporized. Wind is sent by an evaporator fan 11 provided in the vicinity of the evaporator 6, and this wind is cooled by the heat of vaporization of the refrigerant. At this time, moisture contained in the air is cooled, and the surface of the evaporator 6 is gradually iced. The refrigerant expanded in the evaporator 6 returns to the compressor 1 and is compressed again.
On the other hand, in the deicing cycle, the first on-off valve 2 is closed by the control unit 20 and the second on-off valve 13 is opened. 6 is sent. The evaporator 6 is heated by the high-temperature and high-pressure refrigerant, and the ice that has formed on the surface of the evaporator 6 melts. The refrigerant cooled by the heat exchange in the evaporator 6 returns to the compressor 1 again.

Japanese Patent Laid-Open No. 10-220932 (FIG. 2)

  However, in the refrigerator configured as described above, deicing is performed only by heat conduction from the evaporator heated by the high-temperature and high-pressure refrigerant, so when the thickness of the ice attached to the evaporator increases, the thick part of the ice becomes There was a problem that it was difficult to melt and the deicing time was long. Furthermore, when icing away from the evaporator, there is a problem that it is difficult to remove ice only by heat conduction from the evaporator.

  An object of the present invention is to solve the above-described problems, and the purpose of the present invention is to direct heated deicing water to the evaporator even when the thickness of ice attached to the evaporator increases. The sprayed ice melts on the surface of the evaporator with heat and is removed by the dynamic pressure of the sprayed deicing water, allowing the ice to be removed in a short time, and further away from the evaporator. It is an object of the present invention to provide a deicing device for a refrigerator capable of removing ice by spraying deicing water toward the ice even when it is icing.

The deicing device for a refrigerator according to the present invention is a deicing device for a refrigerator that uses deicing water to remove ice adhering to an evaporator of the freezing machine, wherein the deicing water is supplied from the outside. A water pipe, a heated part connected to one end of the first water pipe and heated by the deicing water supplied from the first water pipe, provided near the heated part, and the heated part A heating section for heating
An energy storage unit for storing energy supplied to the heating unit, a first hose having one end connected to the heated unit and supplied with the deicing water heated by the heated unit, An ejection nozzle that is connected to the other end of one hose and injects the deicing water supplied from the first hose, and the heating part, the heated part, and the energy storage part are in the same case It is built-in.

  According to the deicing device for a refrigerator according to the present invention, even when the thickness of ice adhering to the evaporator increases, the deicing water that is heated is sprayed toward the evaporator, and the ice adhering to the surface of the evaporator The ice can be removed by the dynamic pressure of the sprayed deicing water and the ice can be removed in a short period of time, and even if the ice is icing away from the evaporator, There is an effect that the ice can be removed by spraying toward the ice.

Embodiment 1 FIG.
Hereinafter, a deicing device for a refrigerator according to Embodiment 1 of the present invention will be described with reference to the drawings.
FIG. 1 is an overall configuration diagram of a refrigerator deicing device according to Embodiment 1 of the present invention.

  This deicing device for a refrigerator includes a hot water production unit 1 that heats deicing water, a hot water jet unit 2 that jets the heated deicing water toward an evaporator, and a hot water production unit 1 and a hot water jet unit 2. A first hose 13 provided between the hot water production unit 1 and the deicing water from the hot water production unit 1 to the hot water ejection unit 2 and a second hose from which the deicing water is fed from the hot water ejection unit 2 to the hot water production unit 1 15.

The hot water production unit 1 includes a heat exchange coil 3 that is a heated portion to which deicing water is supplied and heated, and a gas burner 4 that is a heating unit that generates heat to heat the deicing water. The gas burner 4 is arranged in the vicinity of the heat exchange coil 3.
The heat exchange coil 3 is connected to one end of a first water pipe 5 that supplies water from the outside. A first valve 6 that adjusts the amount of water from the outside is provided in the middle of the first water pipe 5.
Furthermore, the hot water production unit 1 is provided with a gas cylinder 7 which is an energy storage unit for the gas burner 4 to burn. The heat exchange coil 3, the gas burner 4, and the gas cylinder 7 are built in the same case 19.

  The hot water jetting unit 2 includes a jet nozzle 8 that jets deicing water. The ejection nozzle 8 is a flexible copper pipe and can be deformed in accordance with the shape of the evaporator to be deiced. A plurality of ejection holes 9 for ejecting deicing water are formed on the surface of the ejection nozzle 8.

A heat insulating sheet 10 is suspended from the ejection nozzle 8. Thereby, scattering of the injected deicing water can be prevented.
On the upper surface of the ejection nozzle 8, a hook 11 for mounting the ejection nozzle 8 to the refrigerator is provided.
Below the heat insulating sheet 10, there is provided a dewatering receptacle 12 for storing deicing water used for deicing and water in which ice is melted by the deicing water.

One end of the first hose 13 is connected to the heat exchange coil 3, and deicing water heated by the heat exchange coil 3 is supplied. A jet nozzle 8 is connected to the other end of the first hose 13 to supply deicing water to the jet nozzle 8 of the hot water jet part 2.
One end of the second hose 15 is connected to the drain receiver 12 and the deicing water stored in the drain receiver 12 is supplied. A suction pump 14 is connected to the other end of the second hose 15 to supply deicing water to the suction pump 14 of the hot water production unit 1.

  The hot water production unit 1 includes a second water pipe 16 that is connected at one end to the suction pump 14 and supplies deiced water pumped up by the suction pump 14. Further, the first water pipe 5 is connected to the other end of the second water pipe 16, and the deicing water once used is supplied again to the first water pipe 5. A second valve 17 for adjusting the stored deicing water is provided in the middle of the second water pipe 16, and the first valve 6 is used in combination with water from the outside, or Adjust whether to reuse deiced water.

Moreover, the hot water production part 1 has a protection device 18 that prevents the abnormal operation of the deicer for a refrigerator.
The protection device 18 detects the presence or absence of deicing water in the heat exchange coil 3, and when the water level sensor determines that there is no deicing water in the heat exchange coil 3, A control device (not shown) for preventing the gas burner 4 from burning is provided. As a result, even if the gas burner 4 is ignited in the state where there is no deicing water in the heat exchange coil 3, it is not ignited. Moreover, when the deicing water in the heat exchange coil 3 is lost during the combustion of the gas burner 4, the gas burner 4 is instantly digested.

  The protection device 18 detects a temperature sensor (not shown) that detects that the temperature of the deicing water in the heat exchange coil 3 is equal to or higher than a predetermined value, and this temperature sensor is the deicing water in the heat exchange coil 3. When it is determined that the temperature exceeds the predetermined temperature, a control device (not shown) is provided to prevent overheating of the deicing water by the gas burner 4 based on a signal from the temperature sensor. Thereby, when deicing water is not sprayed from the ejection nozzle 8, combustion of the gas burner 4 stops automatically. When deicing water starts to be sprayed from the ejection nozzle 8, the gas burner 4 automatically burns.

  Further, the protection device 18 detects the abnormality of the suction pump 14, and when the pump sensor determines that the suction pump 14 is in an abnormal state, the protection device 18 operates the suction pump 14 according to the signal of the pump sensor. Control device to stop.

Hereinafter, the operation of the deicing device for a refrigerator having the above configuration will be described.
First, the ejection nozzle 8 is locked to the evaporator adjacent to the freezer to be deiced using the hook 11 at the upper part of the ejection nozzle 8.
Next, after the first valve 6 is fully opened and the second valve 17 is fully closed, the gas burner 4 is ignited. The deicing water supplied from the first water pipe 5 passes through the heated heat exchange coil 3 and is instantaneously heated.
The deicing water heated by the heat exchange coil 3 passes through the first hose 13 and is supplied to the ejection nozzle 8. The deicing water is sprayed from the ejection hole 9 of the ejection nozzle 8 toward the evaporator, and the ice that has landed on the evaporator surface is melted.

  The deicing water mixed with the water in which the ice is melted flows down to the lower side of the evaporator and is stored in the drain receiver 12.

  When the first valve 6 is fully closed and the second valve 17 is fully opened and the suction pump is operated, the deicing water stored in the drain receiver 12 is sucked by the suction pump 14, It passes through the water pipe 5 and is supplied to the heat exchange coil 3 again. The deicing water is heated again by the heat exchange coil 3. Thereafter, the deicing water passes through the first hose 13 and is jetted by the jet nozzle 8.

  As described above, according to this deicing device for a refrigerator, even when the thickness of ice adhering to the evaporator increases, the deicing water that is heated is sprayed toward the evaporator, and the surface of the evaporator In addition to melting the ice adhering to the heat, it can be removed by the dynamic pressure of the injected deicing water, removing the ice in a short time, and even if it is icing away from the evaporator The ice can be removed by spraying deiced water toward the ice.

Further, the used deicing water is stored in the drain receiver 12, and the deicing water is pumped up by the suction pump 14, supplied again to the heat exchange coil 3, heated, and sprayed from the ejection nozzle 8. Can be reused.
Furthermore, since the amount of deicing water flowing to the ejection nozzle 8 can be adjusted by the size of the opening / closing opening of the first valve 6 and the second valve 17, it is possible to adjust the amount of ice icing on the refrigerator. Thus, the amount of deicing water ejected from the ejection nozzle 8 can be adjusted.

  Moreover, since the heat insulation sheet 10 is attached to the ejection nozzle 8, it can prevent that deicing water scatters. Furthermore, the evaporator bathed with deicing water is less susceptible to the cold air in the freezer due to the heat insulating effect of the heat insulating sheet. That is, since the heat of the deicing water is not easily taken away by the cold air, the ice attached to the evaporator is efficiently removed.

  Moreover, since the ejection nozzle 8 is made of flexible copper piping, it can be easily deformed and can be adapted to various refrigerator shapes.

  Further, a hook is attached to the upper part of the ejection nozzle 8, so that the ejection nozzle 8 can be easily locked to the evaporator and does not need to be supported by human hands. Furthermore, since the ejection nozzle 8 can be attached to and detached from the evaporator, it can be attached to the evaporator only when deicing, and can be removed during freezing. As a result, a plurality of evaporators can be deiced with this single deicing device.

  Moreover, since the gas burner 4 is used for the heating part which generates heat, the heat exchange coil 3 is instantaneously heated, and the deicing water is instantaneously heated. Thereby, the work time concerning deicing can be shortened.

  In the first embodiment, the heat exchange coil 3 is described as an example of the heated portion. However, the heat exchange coil 3 is of course not limited to this, and may be a heat exchange fin structure, for example.

  In the first embodiment, the gas burner has been described as an example of the heating unit. However, the present invention is not limited to this, and may be an electric heater, for example.

  In the first embodiment, the gas cylinder is described as an example of the energy storage unit. However, the present invention is of course not limited to this, and may be a battery supplied to an electric heater, for example.

It is a whole block diagram of the deicing apparatus for refrigerators which concerns on Embodiment 1 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Hot water production part, 2 Hot water ejection part, 3 Heat exchange coil, 4 Gas burner, 5 1st water pipe, 6 1st valve, 7 Gas cylinder, 8 Injection nozzle, 9 Injection hole, 10 Thermal insulation sheet, 11 Hook, 12 Drain receptacle, 13 first hose, 14 suction pump, 15 second hose, 16 second water pipe, 17 second valve, 18 protection device, 19 case.

Claims (6)

In a deicing device for a refrigerator that removes ice adhering to the evaporator of the refrigerator using deiced water,
A first water pipe to which the deicing water is supplied from the outside;
A heated portion connected to one end of the first water pipe and heated by the deicing water supplied from the first water pipe;
A heating unit that is provided in the vicinity of the heated part and heats the heated part;
An energy storage unit for storing energy supplied to the heating unit;
A first hose having one end connected to the heated portion and supplied with the deicing water heated in the heated portion;
An ejection nozzle that is connected to the other end of the first hose and injects the deicing water supplied from the first hose;
The deicing device for a refrigerator, wherein the heating unit, the heated unit, and the energy storage unit are built in the same case. Furthermore, a drain receiver for storing the deicing water ejected from the ejection nozzle,
A second hose having one end connected to the drain receiver;
A pump connected to the other end of the second hose and pumping up the deicing water of a drain receiver;
A second water pipe connected between the pump and the first water pipe and supplying the deicing water pumped up by the pump to the first water pipe;
A first valve provided in the first water pipe for adjusting the deicing water supplied from the outside;
A second valve provided in the second water pipe for adjusting the deiced water pumped up;
The deicing device for a refrigerator according to claim 1, further comprising:   The deicing device for a refrigerator according to claim 1 or 2, wherein the ejection nozzle is provided with a heat insulating sheet that prevents the deicing water from scattering.   The deicing device for a refrigerator according to any one of claims 1 to 3, wherein the ejection nozzle has flexibility.   The deicing device for a refrigerator according to any one of claims 1 to 4, wherein a hook that is locked to the evaporator is provided on an upper portion of the ejection nozzle.   The deicing device for a refrigerator according to any one of claims 1 to 5, wherein the heating unit is a gas burner, and the energy storage unit is a gas cylinder.

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