KR200375294Y1 - Refrigerator using existing air conditioner - Google Patents

Abstract

The conventional refrigeration apparatus using an air conditioner according to the present invention, a compressor for converting the refrigerant into a gas state of high temperature, high pressure, a condenser for cooling and liquefying the refrigerant discharged from the compressor, and the refrigerant discharged from the condenser An expansion valve for converting a low temperature and low pressure gas state, an evaporator for exchanging refrigerant discharged from the expansion valve with indoor air, and an accumulator for accumulating and storing a low temperature low pressure gas refrigerant passing through the evaporator to a compressor; In the refrigeration cycle system, between the refrigerant inlet side of the accumulator and the refrigerant outlet side of the filter drier between the condenser and the expansion valve to form a high pressure from the compressor and through the condenser through the refrigerant outlet side of the filter drier It expands and sprays the high pressure refrigerant discharged through the pipeline to the low pressure side. Written is provided the injection tube to prevent overheating of the compressor, between the evaporator and the accumulator is provided with a one-way check valve for preventing the high-pressure refrigerant of the injection start-up the compressor side from flowing back toward the evaporator.

According to the present invention as described above, by connecting a capillary tube between the high pressure side and the low pressure side to form a single injection line it is possible to prevent the operation of the compressor due to the high heat of the compressor.

Description

Refrigerator using existing air conditioner {Refrigerator using existing air conditioner}

The present invention relates to a refrigerating device, and more specifically, to solve the phenomenon in which the compressor stops due to the high temperature of the air conditioner compressor, which has been pointed out as a technical problem in applying the existing air conditioner to the refrigerator, the compressor is continuously started. The present invention relates to a conventional refrigeration apparatus using an existing air conditioner, which can prevent a backflow of a refrigerant during start-up and stoppage due to reaching a constant temperature in the refrigeration apparatus.

In general, an air conditioner such as an air conditioner or a refrigerator used in a home is operated in accordance with a refrigeration cycle that is a closed circuit. As shown in FIG. 1, the refrigeration cycle includes a compressor 110 for converting a refrigerant into a gaseous state of high temperature and high pressure, and a condenser 120 for cooling and liquefying the refrigerant discharged from the compressor 110. And an expansion valve 130 such as a capillary tube for converting the refrigerant discharged from the condenser 120 into a low-temperature, low-pressure gas state, and an evaporator 140 for heat-exchanging the refrigerant discharged from the expansion valve 130 with indoor air. ) And an accumulator 160 that accumulates and stores the gaseous refrigerant having a low temperature and low pressure through the evaporator 140 and then transfers the refrigerant to the compressor 110. Here, in the case of the separate type air conditioner developed for reducing the indoor occupancy area and noise, the indoor unit 101 including the evaporator 140 which is an indoor heat exchanger and the outdoor unit 102 including the condenser 120 which is an outdoor heat exchanger are included. The indoor unit 101 and the outdoor unit 102 are connected by the connecting pipe 150.

The conventional air conditioner having the configuration as described above undergoes a heat exchange operation while passing through a series of refrigeration cycles such as compression, condensation, expansion, and evaporation while the refrigerant moves between the indoor unit 101 and the outdoor unit 102 through the connection pipe 150. Will be

However, since the conventional air conditioners are usually used at room temperature, the starting load of the compressor is relatively small. However, when the air conditioner system is applied to a refrigerator, it is necessary to maintain the high temperature in the range of -10 ° C to -20 ° C Due to the large starting load is a problem that must be stopped for a long time due to excessive operation or operation of the heat sensor of the compressor itself. In addition, when the compressor starts up, the high temperature of the compressor itself causes the cooling oil inside the compressor to escape to the high pressure side, thereby shortening the life of the compressor and causing failure.

The present invention was created in view of the above matters, and in applying the existing air conditioner to the refrigerator, the compressor can be continuously started by solving the phenomenon in which the operation of the compressor is stopped due to the high temperature of the air conditioner compressor. It is an object of the present invention to provide a refrigerating device using an existing air conditioner that can prevent the backflow of the refrigerant at the start and stop due to the reaching of a constant temperature inside.

1 is a view schematically showing a refrigeration cycle system of a conventional air conditioner.

2 is a view schematically showing a system configuration of a refrigeration apparatus using a conventional air conditioner according to the present invention.

<Explanation of symbols for the main parts of the drawings>

110,210 ... compressor 120,220 ... condenser

130,230 ... Expansion valve 140,240 ... Evaporator

160,250 ... Accumulator 222 ... Receiver Tank

224 Filter drier 226,265 Solenoid valve

245 ... check valve 260 ... injection tube

270 high / low pressure gauge

Refrigeration apparatus using an existing air conditioner according to the present invention to achieve the above object,

A compressor for converting the refrigerant into a gaseous state of high temperature and high pressure, a condenser for cooling and liquefying the refrigerant discharged from the compressor, an expansion valve for converting the refrigerant discharged from the condenser into a gaseous state of low temperature and low pressure; A refrigeration cycle system comprising an evaporator for exchanging a refrigerant discharged from the expansion valve with indoor air, and an accumulator for accumulating and transferring a gaseous refrigerant having a low temperature and low pressure passing through the evaporator to a compressor.

The high pressure refrigerant is discharged through the refrigerant outlet side of the filter dryer after forming a high pressure from the compressor between the refrigerant inlet side of the accumulator and the refrigerant outlet side of the filter dryer between the condenser and the expansion valve. Injection pipe is installed to prevent overheating of the compressor by expanding and spraying to the low pressure side, and a one-way check valve is installed between the evaporator and the accumulator to prevent the high pressure refrigerant of the compressor from flowing back to the evaporator side when the injection is started. It is characterized by the point.

Here, preferably, a valve for preventing a natural convection of the refrigerant on the high pressure side through the injection line to the low pressure side is further installed on the pipeline connecting the injection pipe and the outlet side pipe of the filter drier. do.

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

2 is a view schematically showing a system configuration of a refrigeration apparatus using a conventional air conditioner according to the present invention.

2, the conventional refrigeration apparatus using an air conditioner according to the present invention, is basically provided with a refrigeration cycle system of a conventional air conditioner. That is, the compressor 210 converts the refrigerant into a high-temperature, high-pressure gas state, the condenser 220 for cooling and liquefying the refrigerant discharged from the compressor 210, and the refrigerant discharged from the condenser 220. Expansion valve 230 for converting the gas into a low-temperature, low-pressure gas state, an evaporator 240 for exchanging the refrigerant discharged from the expansion valve 230 with indoor air, and a low-temperature low-pressure gas state through the evaporator 240 Accumulator 250 is basically provided to accumulate refrigerant and transfer it to the compressor 210.

However, the refrigerating device of the present invention, along with such a basic configuration, the refrigerant inlet side conduit of the accumulator 250 and the refrigerant outlet side conduit of the filter drier 224 between the condenser 220 and the expansion valve 230. After the high pressure is formed from the compressor 210, the high pressure refrigerant discharged through the refrigerant outlet pipe of the filter drier 224 through the condenser 220 is expanded and sprayed on the low pressure side, thereby overheating the compressor 210. An injection pipe 260 is installed to prevent the pressure, and a unidirectional direction is provided between the evaporator 240 and the accumulator 250 to prevent the high pressure refrigerant of the compressor 210 from flowing back to the evaporator 240 when the injection is started. This is characterized in that the check valve 245 is provided. Here, the injection pipe 210 is preferably composed of a capillary tube for the configuration of the injection line to enable the expansion injection of the refrigerant as it is, it is configured in the form of a winding bundle wound multiple times in a circle.

In addition, preferably, on the conduit connecting the inlet pipe of the injection pipe 260 and the filter drier 224, the refrigerant on the high pressure side may naturally flow to the low pressure side through the injection line when the compressor 210 is stopped for a long time. A solenoid valve 265 is further installed to prevent convection. Here, a solenoid valve may be used as the solenoid valve 265.

In Figure 2, reference numeral 222 is a receiver tank (receiver tank) for storing the liquid refrigerant through the condenser, 224 is a filter for filtration and water removal of the liquid refrigerant flowing out of the receiver tank 222 flows into the expansion valve 230 Dryer (filter drier), 226 is a solenoid valve (solenoid valve) for controlling the start and stop of the compressor 210 when reaching the appropriate temperature of the internal temperature, 270 measures the pressure of the refrigerant discharged from the compressor 210 High pressure / low pressure gauges are shown, respectively.

Then, a brief description will be made of the operation of the refrigeration apparatus using the existing air conditioner according to the present invention having the configuration as described above.

First, when power is supplied to the system and the compressor 210 operates, the refrigerant is changed into a gas state of high temperature and high pressure by the action of the compressor 210. Then, when the high-temperature, high-pressure gaseous refrigerant flows into the condenser 220 from the compressor 210, the condenser 220 cools the liquid by heat exchange with outdoor air and liquefies it. The liquid refrigerant flowing out of the condenser 220 is once stored in the receiver tank 222 and then flows into the expansion valve 230 through filtration and water removal by the filter drier 224. The expansion valve 230 converts the introduced liquid refrigerant into a low-temperature, low-pressure gas state, and the evaporator 240 exchanges the low-temperature, low-pressure gaseous refrigerant through the expansion valve 230 with indoor air. Accordingly, cool air is discharged from the air conditioner installed in the room. The low-temperature, low-pressure gaseous refrigerant passing through the evaporator 240 is accumulated in the accumulator 250 and then transferred to the compressor 210. After that, a series of refrigeration cycles such as compression, condensation, expansion, and evaporation are performed. Will repeat.

In the series of processes as described above, the temperature of the compressor 210 is increased by the continuous operation of the compressor 210, and this is detected by a sensor (not shown), and the signal is a main control part (not shown). Is sent). The main control unit compares the input signal from the sensor with the set reference value and issues an injection start command if the reference value is higher than the reference value. Then, a portion of the high pressure refrigerant discharged through the refrigerant outlet side conduit of the filter drier 224 via the condenser 220 is expanded and sprayed to the low pressure side through the injection line (injection tube 260), thereby cooling the compressor. Overheating of the compressor 210 is prevented. At this time, as the high pressure side refrigerant is expanded and injected into the low pressure side, the high pressure refrigerant may be flowed back to the evaporator 240, and such a back flow is prevented by the check valve 245.

On the other hand, when the required proper internal temperature is reached, the solenoid valve 226 on the inlet side conduit of the expansion valve 230 is shut off, and thus the starting of the compressor 210 is stopped. At this time, when the compressor 210 is stopped for a long time, a phenomenon in which the refrigerant on the high pressure side naturally convections to the low pressure side through the injection line may occur, by blocking the solenoid valve 265 installed on the injection line. Natural convection phenomena such as

As described above, the conventional refrigeration apparatus using the air conditioner according to the present invention by connecting a capillary tube between the high pressure side and the low pressure side by forming a single injection line of the high temperature in advance by the compressor due to the high temperature of the air conditioner compressor The operation of the compressor can be continuously started by preventing the operation of the compressor from being stopped, and thus the same effect as when using the compressor can be obtained without using a separate injection compressor.

In addition, by installing a check valve between the evaporator and the accumulator, it is possible to prevent the backflow of the refrigerant due to the stop of the cycle when the injection temperature is reached as well as when the required temperature is reached.

In addition, by utilizing a condenser under a mass production system, the unit price is lower than that of a small-volume condenser, and thus an economic effect can be obtained.

In addition, considering that the installation place of the refrigerator unit is a majority dense residential complex, it is possible to use a refrigerator that generates the same starting noise as a home air conditioner, thereby significantly reducing noise pollution.

In addition, it is possible to line the refrigerator unit assembly can improve the productivity per unit time according to the skill of the operator.

In addition, the compact and light weight of the unit enables the installation of a hanger on the outer wall of the building, compared to the existing large-weight unit, it can be free from the heat that caused damage to pedestrians.

Claims (3)

A compressor for converting the refrigerant into a gaseous state of high temperature and high pressure, a condenser for cooling and liquefying the refrigerant discharged from the compressor, an expansion valve for converting the refrigerant discharged from the condenser into a gaseous state of low temperature and low pressure; A refrigeration cycle system comprising an evaporator for exchanging a refrigerant discharged from the expansion valve with indoor air, and an accumulator for accumulating and transferring a gaseous refrigerant having a low temperature and low pressure passing through the evaporator to a compressor. The high pressure refrigerant is discharged through the refrigerant outlet side of the filter dryer after forming a high pressure from the compressor between the refrigerant inlet side of the accumulator and the refrigerant outlet side of the filter dryer between the condenser and the expansion valve. Injection pipe is installed to prevent overheating of the compressor by expanding and spraying to the low pressure side, and a one-way check valve is installed between the evaporator and the accumulator to prevent the high pressure refrigerant of the compressor from flowing back to the evaporator side when the injection is started. Refrigeration apparatus using an existing air conditioner characterized in that it is. The method of claim 1, The injection tube is a refrigeration apparatus using an existing air conditioner, characterized in that the capillary for the configuration of the injection line to enable the expansion injection of the refrigerant as it is, in the form of a winding bundle wound in a plurality of circles. The method of claim 1, On the conduit connecting the injection pipe and the outflow pipe of the filter drier, a solenoid valve is further installed to prevent the refrigerant on the high pressure side from convection naturally to the low pressure side through the injection line when the compressor is stopped for a long time. Refrigeration apparatus using conventional air conditioning.