KR101496208B1 - Unified Freezing and Refrigerating System with Ventilating Structure - Google Patents

Abstract

The present invention relates to an integrated cooling system having a ventilating structure to improve the efficiency of a condenser by cooling the condenser using waste heat wasted when the inside of a storage is ventilated by a ventilating part. The integrated cooling system comprises: an inner housing (10) installed to be adjacent to a wall inside a storage (1); an outer housing (20) installed to be in contact with the outside of the wall of the storage (1) to face the inner housing (10); a connecting part (15) penetrated into the wall of the storage (1) to connect the inner housing (10) and the outer housing (20); an evaporator (30) installed inside the inner housing (10); a compressor (40) installed in the lower part inside the outer housing (20); a condenser (50) installed in the upper part of the outer housing (20); an expansion valve (60) installed inside the inner housing (10); and a circulating unit (70) installed in the wall of the storage (1), installed to be connected with the inside of the outer housing (20) to cool the inside of the outer housing (20) using waste heat of air inside the storage (1) circulated by circulating cool air inside the storage (1).

Description

[0001] The present invention relates to an integrated cooling system having a ventilation structure,

The present invention relates to an integrated cooling system having a ventilation structure, and more particularly, to an integrated cooling system having a ventilation structure that improves the efficiency of a condenser by cooling a condenser using waste heat that is wasted when ventilating the interior of the storage by a ventilation part.

Generally, a refrigerator and a refrigerator cooling system are provided with a compressor and a condenser at the bottom of a storage compartment, and the refrigerant liquefied in the condenser is supplied to an evaporator provided inside the storage compartment so that the refrigerant in the evaporator is converted into a gas, So as to cool the inside of the reservoir.

In such a conventional refrigerator and refrigerator cooling system, drain water is generated by the temperature difference when heat is absorbed by the evaporator in the reservoir. This drain water is drained to the outside of the reservoir through the drain pipe.

Also, if the temperature inside the storage tank is low, part of the drain water will freeze and froze outside the evaporator and the refrigerant pipe. In order to improve the efficiency of the evaporator, defrosting to remove such condensation should be performed. At this time, the distilled water generated during the defrosting is discharged to the outside of the storage through the drain pipe.

In this way, a drain pipe for discharging the generated drain water and defrost water to the outside of the storage is required, and the drain water and the defrost water are discarded to the outside as they are in a cooled state, resulting in energy loss.

Meanwhile, since the conventional refrigerator and refrigerator are connected to each other by the refrigerant line piped along the main body of the compressor, the condenser, and the evaporator, when the components of the compressor, the condenser and the evaporator are repaired, There is an inconvenience that the refrigerant must be filled in the piping line after repairing the broken parts after repairing the refrigerant by a separate refrigerant recovery cylinder and the piping in which the refrigerant circulates is exposed to the outside, have.

Korean Patent No. 10-1402413 (entitled " Integrated Cooling Device ") and Korean Patent No. 10-1419660 (entitled " Inventive Storage Device Including Integrated Cooling Device ") have been disclosed in order to solve such problems .

The above-mentioned patents can prevent the deterioration of the stored products by performing the work quickly and easily when installed or separated in the refrigeration and freezing facilities, and prevent the piping from circulating the refrigerant from being exposed to the outside, To prevent leakage.

Despite these advantages, there is no means for processing the generated drain water and defrost water, and there is no mention of the ventilation structure.

Therefore, it is urgent to prepare measures for treating the drain water and the defrost water and measures against the ventilation structure.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an integrated cooling system having a ventilation structure that improves the efficiency of the overall system by using waste heat discharged during ventilation of a storage room to improve the efficiency of the condenser.

Another object of the present invention is to provide an integrated cooling system provided with a ventilation structure that is disposed at an optimum inclination angle when the condenser is disposed in order to improve the cooling efficiency and the refrigerant storage capacity of the receiver and the condenser.

Another object of the present invention is to provide an integrated cooling system having a ventilation structure for evaporating the drain water generated by the temperature difference in the evaporator and drained to the outside and the defrosted water generated from the condensation during the defrosting using the waste heat .

An integrated cooling system provided with a ventilation structure according to the present invention includes an inner housing 10 installed close to an inner side wall 1a of a storage 1; An outer housing 20 installed to be in contact with the outside of one side wall of the storage bin 1 so as to face the inner housing 10; A connecting portion 15 which penetrates one side wall of the storage bin 1 and connects the inner housing 10 and the outer housing 20 to each other; An evaporator (30) installed in the inner housing (10) for absorbing heat inside the storage tank (1) by evaporation of refrigerant; A compressor 40 installed in a lower portion of the outer housing 20 for compressing the refrigerant evaporated in the evaporator 30 to provide a high temperature and high pressure state; A condenser (50) installed at the upper part of the outer housing (20) for condensing and liquefying the refrigerant in the high temperature and high pressure state compressed by the compressor (40) and converting the refrigerant into a low temperature and low pressure state; An expansion valve (60) installed in the inner housing (10) for reducing the pressure of the refrigerant in the low temperature and pressure state converted by the condenser (50) by the throttling action and sending it to the evaporator (30); And one side wall of the storage room 1 to cool the inside of the outside housing 20 by using the waste heat of the air inside the storage room 1 to be ventilated and to cool the inside of the storage room 1, A ventilation part 70 installed to communicate with the inside of the outer housing 20; And a control unit.

The ventilating unit 70 is installed on the other side wall facing the one side wall of the storage room 1 in which the ventilating unit 70 is installed and when the ventilating unit 70 ventilates air inside the storage room 1, So that the air in the reservoir 1 is discharged from the reservoir 1 to the outside of the reservoir 1. The air in the reservoir 1 is discharged from the reservoir 1, And an air inflow damper (2) for preventing backflow to the outside of the air conditioner (1).

The ventilating part 70 includes a ventilating fan 71 located inside one side wall of the storage room 1 and discharging the air inside the storage room 1 to the outside of the storage room 1, 1) is installed outside the one side wall and is connected to the outer housing 20 and is opened when the ventilation fan 71 is operated and closed by its own weight when the ventilation fan 71 stops, And an air discharge damper (72) for preventing air in the storage tank (1) from flowing back into the storage tank (1).

A first collecting part 100 installed at a lower part of the evaporator 30 and collecting drain water generated by a temperature difference between the inside and the outside of the evaporator 30; A drain pipe 110 having one end connected to the first collecting unit 100 to drain the drain water collected by the first collecting unit 100; The compressor 40 is installed at a lower portion of the compressor 40 and accommodates a part of the first refrigerant pipe 130 connecting the compressor 40 and the condenser 50 and is connected to the other end of the drain pipe 110 A second collecting part 120 collecting the drain water drained by the drain pipe 110 and causing the collected drain water to be heat-exchanged with the accommodated first refrigerant pipe 130 to evaporate; And further comprising:

The compressor further comprises a separate receiver (190) for storing low-temperature low-pressure refrigerant condensed and condensed by the condenser (50) and moving the stored refrigerant to the expansion valve (60).

A third collecting part 160 provided below the second collecting part 120 and collecting the remaining drain water evaporated in the second collecting part 120; A spray pump 170 connected to the third collecting unit 160 to pump the collected drain water; An injection nozzle 180 for injecting the drain water pumped by the injection pump 170 into the condenser 50; Is further provided.

The evaporator 30 is installed on a first branch pipe 145 branched on a second refrigerant pipe 140 connecting the condenser 50 and the expansion valve 60 and connecting the evaporator 30, A solenoid valve (not shown) for causing a part of the refrigerant condensed and liquefied in the condenser 50 to flow through the refrigerant pipe accommodated in the condenser 50 and the condenser 50 to remove condensation caused by freezing of water generated by temperature difference in the evaporator 200); A part of the third branch pipe 145 connecting the evaporator 30 and the compressor 40 is accommodated in the rear of the solenoid valve 200, A heat exchanger 210 for exchanging heat between the refrigerant flowing in the one-minute pipe 145 and the refrigerant flowing in the third refrigerant pipe 150; Is further provided.

At this time, the refrigerant is installed on the first branch pipe 145 located at the rear end of the heat exchanger 210 and is located at a lower portion of the evaporator 30, and the refrigerant heat-exchanged by the heat exchanger 210 flows And a coil-shaped coil pipe (220) for heating the evaporator (30).

The second refrigerant pipe 130 is connected to the compressor 40 and the condenser 50 and is connected to the second refrigerant pipe 130 located at the rear end of the second condenser 120, And is opened on the branch pipe (135) to remove condensation caused by freezing of water generated due to temperature difference in the refrigerant pipe and the evaporator housed in the inner housing (10) A solenoid valve 200 for allowing a part of refrigerant heat-exchanged in the heat exchanger 120 to flow; A part of the second branch pipe 135 and a part of the third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40 are accommodated in the rear of the second solenoid valve 200, A heat exchanger (210) for exchanging heat between the refrigerant flowing in the second branch pipe (135) and the refrigerant flowing in the third refrigerant pipe (150); May be further included.

At this time, the refrigerant is installed on the second branch pipe 135 located at the rear end of the heat exchanger 210 and is located at a lower portion of the evaporator 30, and the refrigerant heat-exchanged by the heat exchanger 210 flows And a coil-shaped coil tube 220 for heating the evaporator 30.

In addition, the present invention is provided on a first branch pipe 145 branched on a second refrigerant pipe 140 connecting the condenser 50 and the expansion valve 60 to connect the evaporator 30, A part of the refrigerant condensed and liquefied in the condenser 50 is caused to flow through the refrigerant pipe accommodated in the inner housing 10 and the condenser 50 to be opened at regular intervals to remove condensation caused by freezing of water generated by temperature difference in the evaporator A solenoid valve 200; A suction pressure regulating valve 230 installed on a third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40 and reducing the pressure of the refrigerant evaporated by the evaporator 30 to a pressure within a predetermined range; ); May be further included.

At this time, the refrigerant heat exchanged by the heat exchanger 210 is installed on the first branch pipe 145 located at the rear end of the solenoid valve 200, and is located below the evaporator 30, And a coil-shaped coil tube 220 for heating the evaporator 30.

The second refrigerant pipe 130 is connected to the compressor 40 and the condenser 50 and is connected to the second refrigerant pipe 130 located at the rear end of the second condenser 120, And is opened on the branch pipe (135) to remove condensation caused by freezing of water generated due to temperature difference in the refrigerant pipe and the evaporator housed in the inner housing (10) A solenoid valve 200 for allowing a part of refrigerant heat-exchanged in the heat exchanger 120 to flow; A suction pressure regulating valve 230 installed on a third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40 and reducing the pressure of the refrigerant evaporated by the evaporator 30 to a pressure within a predetermined range; ); May be further included.

At this time, the refrigerant heat exchanged by the heat exchanger 210 is installed on the second branch pipe 135 located at the rear end of the solenoid valve 200 and is located below the evaporator 30, And a coil-shaped coil tube 220 for heating the evaporator 30.

The present invention can improve the efficiency of the entire system by improving the efficiency of the condenser by cooling the condenser by using waste heat that is discarded during ventilation of the storage tank. In addition, the drain water generated by the temperature difference in the evaporator and drained to the outside and the defrost water generated from the condensation at the time of defrosting are evaporated by using the waste heat, so that the space can be utilized. It is possible to reduce the energy loss by defrosting the refrigerant by heating the refrigerant without using any separate heating element at the time of defrosting.

FIG. 1 is a schematic view of an integrated cooling system having a ventilation structure according to the present invention.
FIG. 2 is a view showing an operation of the integral cooling system provided with a ventilation structure according to the present invention during ventilation.
3 is a side view of an integral cooling system with a ventilation structure according to the present invention.
4 is a view illustrating the internal structure of the outer housing of the integral cooling system having the ventilation structure according to the present invention.
5 to 8 are views showing the operation of the integrated cooling system provided with the ventilation structure according to the present invention.
9 is a schematic view of an integrated cooling system having another type of ventilation structure according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an integrated cooling system having a ventilation structure according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a view showing a schematic structure of an integrated cooling system provided with a ventilation structure according to the present invention, FIG. 2 is a view showing an operation during ventilation of an integrated cooling system provided with a ventilation structure according to the present invention, 3 is a side view showing an integral cooling system having a ventilation structure according to the present invention, FIG. 4 is a view showing an inner structure of an outer housing of an integrated cooling system having a ventilation structure according to the present invention, and FIGS. 5 to 8 FIG. 9 is a view illustrating a schematic structure of an integrated cooling system provided with another type of ventilation structure according to the present invention. FIG. 9 is a schematic view illustrating an operation of the integrated cooling system having the ventilation structure according to the present invention.

The integrated cooling system having the ventilation structure according to the present invention is installed inside and outside the storage room 1 for refrigeration and freezing to cool the inside of the storage room 1. [

1, 2 and 5 to 9, the integrated cooling system provided with the ventilation structure according to the present invention includes an evaporator 30, a compressor 40, a condenser 50 , And an expansion valve (60).

An evaporator 30 and an expansion valve 60 are installed inside the storage tank 1 and a compressor 40 and a condenser 50 are installed outside the storage tank 1.

1 and 2, an evaporator 30 installed inside the storage tank 1 and an inner housing 10 accommodating an expansion valve 60 are provided, and a compressor (not shown) installed outside the storage tank 1 40 and an outer housing 20 for accommodating the condenser 50 are provided.

As shown in FIG. 3, the inner housing 10 is installed close to the inner side wall 1a of the storage room 1, and is spaced apart from the one side wall of the storage room 1 by a predetermined distance. The outer housing 20 is installed so as to be in contact with the outside of one side wall of the storage bin 1 so as to face the inner housing 10.

The present invention is characterized in that the evaporator 30, the compressor 40, the condenser 50, the expansion valve 60 and the refrigerant pipes are accommodated in the inner housing 10 and the outer housing 20, So that it is possible to prevent the parts of the connecting parts from being damaged.

3, upper parts of the inner housing 10 and the outer housing 20 are connected to each other by a connection part 15, and the connection part 15 is connected to one side wall of the storage room 1 .

1 to 3, a ventilation part 70 for ventilating the inside of the storage room 1 is provided on one side wall of the storage room 1 where the inner housing 10 is installed. As shown in FIG. 3, the ventilation part 70 is installed so as to be in close proximity to the inner housing 10 and communicate with the inside of the outer housing 20.

The ventilating unit 70 is installed on one side wall of the storage room 1 and is installed to communicate with the inside of the outer housing 20 and is connected to the ventilating room 1 by ventilating the cold air inside the storage room 1 And serves to cool the inside of the outer housing 20 by using waste heat of the inside air.

1 and 2, the ventilating unit 70 includes a ventilating fan 71 inside the storage room 1 and an air venting damper 72 outside the storage room 1. The ventilation fan 71 is installed to be close to the inner housing 10 and the air discharge damper 72 is installed to communicate with the outer housing 20.

The ventilation part 70 is installed by perforating one side wall of the storage room 1 and the outer housing 20 communicates with the ventilation part 70 and the ventilation part 70 communicates with the ventilation part 70, A damper 72 is provided.

The ventilation fan 71 is positioned inside one side wall of the storage tank 1 and discharges the air inside the storage tank 1 to the outside of the one side wall of the storage tank 1.

The air discharge damper 72 is located outside the one side wall of the storage room 1 and is installed to communicate with the outer housing 20 and is opened when the ventilation fan 71 is operated. So that air in the inside of the outer housing 20 is prevented from flowing back into the reservoir 1.

It is preferable that the ventilation fan 71 is operated and controlled by the control unit 80 so as to be operated when the temperature inside the storage tank 1 is too low or the air inside the storage tank 1 is turbid.

The control unit 80 controls the operation of the evaporator 30, the compressor 40, the condenser 50 and the expansion valve 60. When the temperature inside the storage tank 1 is lower than the set temperature, ). Preferably, the controller 80 is installed on the outer wall of the storage room 1.

When storage of vegetables, such as in the reservoir (1), it is the carbon dioxide occurs takhage the air inside the reservoir (1) and that includes a CO ₂ sensor (90) within the reservoir (1), the CO ₂ And the ventilation fan 71 is operated by the control unit 80 when it is sensed by the sensing sensor 90.

In addition, the control unit 80 can control the operation time and the number of times of the ventilation fan 71 by a timer.

The ventilation fan 71 is operated by a control signal of the control unit 80 and discharges the cold air inside the storage 1. [ Cool air flows by the operation of the ventilation fan 71, and the air that is flowing through the ventilation fan 71 is discharged into the outer housing 20 by rotating the air discharge damper 72 hinged to the upper part. When the operation of the ventilation fan 71 is stopped, the air discharge damper 72 is rotated to its original position by its own weight to prevent air from flowing backward from the outer housing 20 to the storage room 1, The refrigerator 1 can keep the refrigerator or the refrigerator inside.

At this time, the discharged cold air cools the condenser 50 accommodated in the outer housing 20. As described above, the efficiency of the cooling system according to the present invention can be improved by improving the efficiency of the condenser 50 by using the waste heat discharged by the ventilation unit 70.

When the ventilation fan 71 is operated to ventilate and the air discharge damper 72 is opened, a negative pressure is applied to the inside of the storage room 1 and the air outside the storage room 1 is introduced into the storage room 1 do.

The ventilating unit 70 is installed in the other wall facing the side wall on which the ventilating unit 70 is installed and when the ventilating unit 70 ventilates air inside the ventilating unit 1, 1 is opened by a negative pressure applied to the inside of the storage room 1 to allow outside air to flow into the storage room 1 and is closed by self weight during the disappearance of the negative pressure inside the storage room 1, And an air inflow damper (2) for preventing backflow to the outside of the storage tank (1).

When the ventilation fan 71 is operated and the air discharge damper 72 is opened in the ventilation mode, a negative pressure is applied to the inside of the storage room 1, and the ventilation fan 70 is installed on the other side wall of the storage room 1 The air inflow damper 2 is opened as shown in Fig. 2, so that air flows from the outside of the storage room 1 and the inside of the storage room 1 is ventilated. At this time, if air flows from the outside of the storage tank 1, the temperature inside the storage tank 1 becomes higher than the set value. To prevent this, the condenser 50, the expansion valve 60 and the evaporator 30 are operated, 1) The internal temperature is kept within the set range. Like the air discharge damper 72, the air inflow damper 2 has a backflow prevention function. The air inflow damper 2 is rotated by its own weight when the pressure in the reservoir 1 is stabilized by the inflow of air from outside the reservoir 1 and the air in the reservoir 1 is discharged to the outside of the reservoir 1 Thereby preventing backflow.

The ventilating portion 70 is provided to be close to the condenser 50 so as to cool the condenser 50 and is installed at one side wall of the reservoir 1 close to the condenser 50, And is installed on one side wall of the reservoir 1 located at a lower portion of the reservoir 1.

A cooling fan 51 is provided at an upper portion of the outer housing 20 to cool the condenser 50 by discharging the air inside the outer housing 20 as described later. The cool air ventilated by the ventilating part 70 is brought into contact with the condenser 50 by the discharging operation of the cooling fan 51 when the condenser 50 is installed on one wall of the storage room 1 close to the condenser 50 The ventilation part 70 may be installed on one side wall of the reservoir 1 located below the condenser 50 as shown in FIG.

The evaporator 30, the compressor 40, the condenser 50, and the expansion valve 60 are well known and their operation will be briefly described below.

The evaporator (30) is installed in the inner housing (10) and serves to absorb heat inside the storage container (1) by evaporation of the refrigerant.

And a flow fan 31 is provided at one side of the evaporator 30 to flow the cold air generated by the evaporator 30 to the inside of the storage 1. An opening (not shown) is provided on the side surface of the inner housing 10 so that the cold air flowing by the flow fan 31 can be moved to the inside of the storage tank 1.

The compressor (40) is installed in the lower part of the outer housing (20) and compresses the refrigerant evaporated in the evaporator (30) to make the high temperature and high pressure state.

The condenser 50 is disposed in the upper portion of the outer housing 20 and serves to condense and liquefy the refrigerant in the high-temperature and high-pressure state compressed by the compressor 40 to a low-temperature and low-pressure state. A cooling fan 51 for cooling the condenser 50 is installed in the upper portion of the outer housing 20 to improve the efficiency of the condenser 50 and the air discharged by the cooling fan 51 is introduced into the air To be released.

The expansion valve 60 is installed in the inner housing 10 and serves to reduce the refrigerant in the low-temperature and low-pressure state converted by the condenser 50 to the evaporator 30 by reducing the throttle action.

The refrigerant flowing in the evaporator 30 is evaporated to allow the refrigerant to absorb the heat inside the storage tank 1. [ The refrigerant absorbing heat from the evaporator 30 is moved to the compressor 40 through the third refrigerant pipe 150 connecting between the evaporator 30 and the compressor 40. The compressor 40 compresses the evaporated refrigerant to a high temperature and high pressure state and is moved to the condenser 50 through the first refrigerant pipe 130 connecting the compressor 40 and the condenser 50. In the condenser 50, the refrigerant in a high-temperature and high-pressure state is converted into a low-temperature and low-pressure state. The low-temperature and low-pressure refrigerant is transferred to the expansion valve (60) through the second refrigerant pipe (140) connecting the condenser (50) and the expansion valve (60). The expansion valve 60 reduces the pressure of the high-temperature and high-pressure liquid refrigerant condensed and liquefied in the condenser 50 to a pressure capable of causing evaporation by the throttling action.

The refrigerant flowing in the evaporator 30 evaporates and the refrigerant absorbs the heat inside the evaporator 30. At this time, due to the temperature difference between the inside and the outside of the evaporator 30, It will flow down. 1 and 2, the first collector 100, the drain tube 110, and the second collector 120 may be provided to treat the moisture.

The first collecting part 100 is installed at a lower part of the evaporator 30 and collects water droplets generated by the temperature difference between the inside and the outside of the evaporator 30.

One end of the drain pipe 110 is connected to the first collecting unit 100 and drains the water collected by the first collecting unit 100.

The second collecting part 120 is installed below the compressor 40 and accommodates a part of the first refrigerant pipe 130 connecting the compressor 40 and the condenser 50, And drains the drain water drained by the drain pipe 110 to heat the collected drain water to be exchanged with the received first refrigerant pipe 130 to evaporate the drained water. The second collecting part 120 is disposed at a lower position than the first collecting part 100 and the second collecting part 120 is provided in a plate shape having a predetermined height.

Water drops formed at the outside of the evaporator 30 due to a temperature difference between the inside and the outside of the evaporator 30 are collected in the first collecting part 100 and drained to the outside of the storage 1 through the drain pipe 110 ). The low-temperature drain water drained by the drain pipe 110 is collected by the second collecting unit 120.

A portion of the first refrigerant pipe 130 connecting the compressor 40 and the condenser 50 is disposed in the second accumulator 120. The first refrigerant pipe 130 is connected to the compressor The refrigerant compressed by the first refrigerant pipe 40 and then brought into a high temperature and high pressure state is sent to the blowing unit 50. When a part of the first refrigerant pipe 130 is disposed inside the second stacking unit 120 The low-temperature drain water collected by the second collecting unit 120 is heat-exchanged with the first refrigerant pipe 130 through which the high-temperature and high-pressure refrigerant flows, and the heat is exchanged through the second collecting unit 120 And the drainage water collected at the low temperature is evaporated.

As described above, the cooling system according to the present invention differs from the conventional cooling system in that the drain water is evaporated in the outer housing 20, so that a separate drain water and a collection water tank for collecting the defrost water are not needed, (120) is disposed inside the outer housing (20), it is not necessary to provide a separate space occupied by the collection container.

In order to increase the efficiency of the condenser, the present invention cools the condenser by using the drain water and the defrost water that are not evaporated in the second water collecting part (120).

9, a third collecting unit 160 is disposed below the second collecting unit 120 and collects the remaining drain water evaporated in the second collecting unit 120, An injection pump 170 connected to the third collecting unit 160 to pump the collected drain water and an injection nozzle 180 for injecting the drain water pumped by the injection pump 170 into the condenser 50 .

The third collecting unit 160 collects the drain water and the defrost water remaining in the second collecting unit 120 without being evaporated in the lower part of the second collecting unit 120. The third collecting unit 160 Is pumped by the injection pump 170 so that the low temperature water is injected into the injection nozzle 180 provided in the upper part of the condenser 50.

By cooling the condenser 50 by spraying the low-temperature water in this way, the efficiency of the condenser 50 can be improved to improve the efficiency of the cooling system according to the present invention.

At this time, it is preferable that the injection pump 170 is intermittently operated by the control unit 80 so as to be sprayed by the injection nozzle 180.

A cooling fan 51 for cooling the condenser 50 by discharging the air inside the outer housing 20 as shown in FIG. 3 is provided on the upper portion of the outer housing 20 at the upper portion of the condenser 50, The air discharged by the cooling fan (51) is discharged into the atmosphere. 1 and 2, the cooling fan 51 is shown on the upper part of the condenser 50 to facilitate understanding. However, the installation of the cooling fan 51 is installed on the upper part of the outer housing 20 as shown in FIG.

On the other hand, in the refrigerant pipe and the evaporator accommodated in the inner housing 10, a condensation phenomenon occurs due to freezing of water caused by temperature difference, and it is necessary to remove the condensation to improve the cooling efficiency of the evaporator. Removing this condensation is called defrosting.

There are various methods for defrosting of the present invention.

The first method is a method using the solenoid valve 200 and the heat exchanger 210 as shown in FIG.

For this purpose, the first branch pipe 145, the solenoid valve 200 and the heat exchanger 210 are provided.

The solenoid valve 200 is installed on a first branch pipe 145 branched on a second refrigerant pipe 140 connecting the condenser 50 and the expansion valve 60 and connecting the evaporator 30 , A portion of the low-temperature refrigerant condensed and liquefied in the condenser (50) is discharged through the refrigerant pipe accommodated in the inner housing (10) and the defrosting device to remove condensation caused by freezing of water generated by temperature difference Flow.

The heat exchanger 210 is installed at a rear end of the solenoid valve 200 and connects a part of the first branch pipe 145 and the evaporator 30 and the compressor 40 to the third A part of the refrigerant pipe 150 is accommodated and a part of the refrigerant flowing in the first branch pipe 145 due to the opening of the solenoid valve 200 and the refrigerant flowing in the third refrigerant pipe 150 Exchanges heat so as to convert a portion of the refrigerant flowing in the first branch pipe 145 into a high-temperature refrigerant.

In addition, the present invention is characterized in that it is disposed on the first branch pipe 145 located at the rear end of the heat exchanger 210 and is located at a lower portion of the evaporator 30, And a coil-shaped coil pipe 220 for heating the lower portion of the evaporator 30 by flowing the refrigerant of the evaporator 30. Although the coil pipe 220 is not shown in the figure as a coil, it is in the form of a coil which is generally used to increase the heating efficiency of the lower portion of the evaporator 30. [

The configuration and defrosting method of the apparatus for the first defrosting of the present invention are as follows.

The solid line arrows shown in the figure represent the flow of refrigerant for cooling and the dashed arrows represent flow for defrosting some refrigerant.

A first branch pipe 145 branched on a second refrigerant pipe 140 connecting the condenser 50 and the expansion valve 60 and connected to an evaporator heating coil pipe 220 installed on the lower portion of the evaporator 30, The solenoid valve 200 and the heat exchanger 210 are installed in order.

The solenoid valve 200 is opened by a control signal of the control unit 80 when the solenoid valve 200 is in the off state, and a part of the liquefied refrigerant in the condenser 50 is moved. Some of the refrigerant is heat-exchanged through the heat exchanger 210, heated, and moved into the evaporator 30. The first refrigerant pipe 130 that is moved from the evaporator 30 to the compressor 40 is passed through the heat exchanger 210 so that the high temperature refrigerant transferred from the evaporator 30 and the refrigerant discharged from the condenser 50, A part of the refrigerant which is liquefied and liquefied in the heat exchanger 210 is heat-exchanged with each other to be converted into a high-temperature refrigerant, and is supplied to the inside of the evaporator 30 so as to cover the outside of the evaporator 30.

At this time, the refrigerant is installed on the first branch pipe 145 located at the rear end of the heat exchanger 210 and is located at a lower portion of the evaporator 30, and the refrigerant heat-exchanged by the heat exchanger 210 flows And a coil-shaped coil tube 220 for heating the evaporator 30 is further provided.

The refrigerant on the first branch pipe 145, which is heat-exchanged with each other in the heat exchanger 210 and is converted into a high-temperature refrigerant, passes through the evaporator heating coil pipe 220 arranged in a zigzag form under the evaporator 30 The entire lower portion of the evaporator 30 is heated and supplied to the inside of the evaporator 30 so as to cover the outside of the evaporator 30.

The second method is a method using the solenoid valve 200 and the heat exchanger 210 as in the first method.

In the second method, unlike the first method, the solenoid valve 200 is provided on the second branch pipe 135 as shown in FIG.

The solenoid valve 200 connects the compressor 40 and the condenser 50 and is connected to the evaporator 30 by branching on the first refrigerant pipe 130 positioned at the rear end of the second collecting part 120 And the second branch pipe (135) is installed on the inner housing (10), and the refrigerant pipe accommodated in the inner housing (10) and the evaporator So that a part of the refrigerant heat-exchanged in the collecting part 120 flows.

The heat exchanger 210 is installed at a rear end of the second solenoid valve 200 and is connected to a portion of the second branch pipe 135 and a third refrigerant pipe 150 And a refrigerant flowing in the second branch pipe 135 and a refrigerant flowing in the third refrigerant pipe 150 exchange heat with each other.

The configuration of the apparatus for defrosting and the defrosting method of the present invention are as follows.

An evaporator heating coil pipe 220 connected to the compressor 40 and the condenser 50 and branched on a first refrigerant pipe 130 located at the rear end of the second stacker 120 and installed below the evaporator 30, The solenoid valve 200 and the heat exchanger 210 are sequentially installed in the second branch pipe 135 connected to the second branch pipe 135.

The solenoid valve 200 is opened by a control signal of the control unit 80 when the solenoid valve 200 is in operation and a part of the refrigerant heat-exchanged in the second collecting unit 120 is moved. Some of the refrigerant is heat-exchanged through the heat exchanger 210 and is heated and moved to the evaporator heating coil pipe 220 to heat the evaporator 30 and move to the inside of the evaporator 30. At this time, the first refrigerant pipe 130, which is moved from the evaporator 30 to the compressor 40, is passed through the heat exchanger 210, and the high-temperature refrigerant transferred from the evaporator 30, A part of the refrigerant heat-exchanged in the heat exchanger 120 is exchanged with each other in the heat exchanger 210 to be converted into a high-temperature refrigerant. The refrigerant converted into a high temperature passes through the evaporator heating coil pipe 220 disposed in a zigzag form at the lower portion of the evaporator 30 to heat the lower portion of the evaporator 30 as a whole, So that the evaporator 30 is prevented from being damaged.

At this time, the refrigerant is installed on the second branch pipe 135 located at the rear end of the heat exchanger 210 and is located at a lower portion of the evaporator 30, and the refrigerant heat-exchanged by the heat exchanger 210 flows And a coil-shaped coil tube 220 for heating the evaporator 30 is further provided.

The refrigerant on the second branch pipe 135, which is heat-exchanged with each other in the heat exchanger 210 and is converted into a high-temperature refrigerant, passes through the evaporator heating coil pipe 220 arranged in a zigzag shape below the evaporator 30 The entire lower portion of the evaporator 30 is heated and supplied to the inside of the evaporator 30 so as to cover the outside of the evaporator 30.

The third method is a method using the solenoid valve 200 and the suction pressure control valve 230 as shown in FIG.

To this end, the first branch pipe 145, the solenoid valve 200 and the suction pressure control valve 230 are provided.

The solenoid valve 200 is installed on a first branch pipe 145 branched on a second refrigerant pipe 140 connecting the condenser 50 and the expansion valve 60 and connecting the evaporator 30 , A part of the refrigerant condensed and liquefied in the condenser (50) flows through the refrigerant pipe (50) in the refrigerant pipe accommodated in the inner housing (10) and in the condenser (50) by removing the condensation caused by freezing of water generated by temperature difference in the evaporator .

The suction pressure control valve 230 is installed on a third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40. The refrigerant evaporated by the evaporator 30 is discharged to a pressure within a certain range . The suction pressure control valve 230 serves to protect the compressor 40 by reducing the pressure of the refrigerant evaporated by the evaporator 30 to a pressure within a predetermined range.

The configuration and defrosting method for the third defrosting of the present invention are as follows.

A first branch pipe 145 branched on a second refrigerant pipe 140 connecting the condenser 50 and the expansion valve 60 and connected to an evaporator heating coil pipe 220 installed on the lower portion of the evaporator 30, And a suction pressure control valve 230 is installed on the third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40. The solenoid valve 200 is installed in the second refrigerant pipe 150,

The solenoid valve 200 is opened by a control signal of the control unit 80 when the solenoid valve 200 is in the off state, and a part of the liquefied refrigerant in the condenser 50 is moved. A part of the refrigerant is moved to the inside of the evaporator 30 and the outside of the evaporator 30 is shaken.

The present invention is also characterized in that it is provided on the second branch pipe 135 located at the rear end of the solenoid valve 200 and is located at a lower portion of the evaporator 30 and includes a refrigerant heat exchanged by the heat exchanger 210 And a coil-shaped coil pipe 220 for heating the evaporator 30. The coiler pipe 220 may be a coil-shaped coil pipe.

Some of the refrigerant on the second branch pipe 135 condensed and liquefied in the condenser 50 due to the opening of the solenoid valve 200 flows into the evaporator heating coil pipe 220 arranged in a zigzag form on the lower portion of the evaporator 30 The evaporator 30 is entirely heated and supplied to the inside of the evaporator 30 so that the evaporator 30 is heated.

The refrigerant passing through the evaporator 30 is decompressed through the suction pressure control valve 230 provided on the third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40 and is moved to the compressor 40 do.

The fourth method is a method using the solenoid valve 200 and the suction pressure control valve 230 as in the third method.

The fourth method is different from the third method in that the solenoid valve 200 is provided on the second branch pipe 135 as shown in FIG.

A second branch pipe 135 connected to the compressor 40 and the condenser 50 and branched on the first refrigerant pipe 130 located at the rear end of the second collecting unit 120 and connecting the evaporator 30, And a suction pressure control valve 230 is installed on the third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40. The solenoid valve 200 is installed on the third refrigerant pipe 150,

The solenoid valve 200 connects the compressor 40 and the condenser 50 and is connected to the evaporator 30 by branching on the first refrigerant pipe 130 positioned at the rear end of the second collecting part 120 And the second branch pipe (135) is installed on the inner housing (10), and the refrigerant pipe accommodated in the inner housing (10) and the evaporator So that a part of the refrigerant heat-exchanged in the collecting part 120 flows.

The suction pressure control valve 230 is installed on a third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40. The refrigerant evaporated by the evaporator 30 is discharged to a pressure within a certain range .

The configuration and defrosting method of the fourth defrosting apparatus of the present invention are as follows.

A second branch pipe 135 connected to the compressor 40 and the condenser 50 and branched on the first refrigerant pipe 130 located at the rear end of the second collecting unit 120 and connecting the evaporator 30, And a suction pressure control valve 230 is installed on the third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40. The solenoid valve 200 is installed on the third refrigerant pipe 150,

The solenoid valve 200 is opened by a control signal of the control unit 80 when the solenoid valve 200 is in operation and a part of the refrigerant heat-exchanged in the second collecting unit 120 is moved. A part of the refrigerant is moved to the inside of the evaporator 30 and the outside of the evaporator 30 is shaken.

The second solenoid valve 200 is disposed on the second branch pipe 135 located at the rear end of the solenoid valve 200 and is located at a lower portion of the evaporator 30. When the solenoid valve 200 is opened, And a coil-shaped coil pipe 220 for partially heating the evaporator 30 by flowing a part of the refrigerant heat-exchanged in the receiver 120 is further provided.

A part of the refrigerant on the second branch pipe 135 which is heat-exchanged in the second collecting part 120 by the opening of the solenoid valve 200 flows into the evaporator heating coil pipe The refrigerant passes through the evaporator 220 and heats the lower portion of the evaporator 30 as a whole and is supplied into the evaporator 30 so that the evaporator 30 is heated.

The refrigerant passing through the evaporator 30 is decompressed through the suction pressure control valve 230 provided on the third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40 and is moved to the compressor 40 do.

As described above, the cooling system of the present invention is advantageous in that it does not require a heater coil that is operated by a separate electric power because it is heated using a high-temperature refrigerant, that is, hot gas.

The defrost control method of the cooling system according to the present invention simultaneously applies the defrost control method by time and the defrost control method by temperature setting.

The defrosting control by the time is set four to six times a day, and the defrosting operation time is from 20 minutes to 30 minutes.

Defrost control by temperature setting sets the temperature for defrosting, and defrosting operation is performed when it is lower than the set temperature range. At this time, the defrosting operation time is set according to the temperature condition.

As described above, the present invention can simultaneously improve evaporator cooling efficiency by simultaneously applying defrost control by time and defrost control by temperature.

The operation control of each configuration by the control unit for controlling the cooling system of the present invention is as shown in [Table 1].

[Table 1] Operation control by the control unit of the cooling system of the present invention

The evaporator 30, the compressor 40, the condenser 50 and the expansion valve 60 are operated and the basic refrigeration or freezing operation is performed when the temperature inside the storage tank 1 becomes equal to or higher than the set value, Function.

The operation of the evaporator 30 and the expansion valve 60 is stopped and the internal temperature of the storage tank 1 is lowered to the set value . At this time, the operation of the ventilation fan 71 is stopped. However, since the internal temperature of the storage tank 1 is raised by the operation stop of the evaporator 30 and the expansion valve 60 so that the internal temperature of the storage tank 1 becomes a set value, It is possible to reduce the time required for the internal temperature of the storage tank 1 to become a set value.

When the temperature inside the storage tank 1 is too low to be below the defrost temperature set value, dew condensation is generated in the evaporator 30 and the refrigerant pipe provided inside the storage tank 1. In order to remove the condensation, the solenoid valve 200, The low temperature refrigerant from the condenser 50 is converted into high temperature refrigerant through the heat exchanger 210 and is sent to the evaporator 30 to melt the condensation generated in the evaporator 30 and the refrigerant pipe.

When the carbon dioxide is detected to be higher than the set value in the storage tank 1, the ventilation fan 71 is operated to vent air in the storage tank. The condenser 50, the expansion valve 60 and the evaporator 30 are operated to maintain the temperature of the interior of the storage tank 1 at the set value in order to prevent the temperature of the interior of the storage tank 1 from being higher than the set value. .

Reference numeral 240 is a known filter dryer. A liquid level meter may be installed between the rear end of the filter dryer 240 and the expansion valve 60.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1: Storage tank 2: Air inflow damper
10: inner housing 15:
20: outer housing 30: evaporator
31: Flow fan 40: Compressor
50: condenser 51: cooling fan
60: expansion valve 70: ventilation part
71: ventilation fan 72: air discharge damper
80: control unit 90: CO ₂ detection sensor
100: first collecting part 110: drain pipe
120: second collecting part 130: first refrigerant pipe
140: second refrigerant piping 145: branch pipe
150: third refrigerant pipe 160: third collecting part
170: injection pump 180: injection nozzle
190: Receiver 200: Solenoid valve
210: Heat exchanger 220: Coil tube
230: Suction pressure regulating valve 240: Filter dryer

Claims (14)

An inner housing 10 installed close to the inner side wall 1a of the storage bin 1;
An outer housing 20 installed to be in contact with the outside of one side wall of the storage bin 1 so as to face the inner housing 10;
A connecting portion 15 which penetrates one side wall of the storage bin 1 and connects the inner housing 10 and the outer housing 20 to each other;
An evaporator (30) installed in the inner housing (10) for absorbing heat inside the storage tank (1) by evaporation of refrigerant;
A compressor 40 installed in a lower portion of the outer housing 20 for compressing the refrigerant evaporated in the evaporator 30 to provide a high temperature and high pressure state;
A condenser (50) installed at the upper part of the outer housing (20) for condensing and liquefying the refrigerant in the high temperature and high pressure state compressed by the compressor (40) and converting the refrigerant into a low temperature and low pressure state;
An expansion valve (60) installed in the inner housing (10) for reducing the pressure of the refrigerant in the low temperature and pressure state converted by the condenser (50) by the throttling action and sending it to the evaporator (30);
And is installed on one side wall of the storage room 1 to cool the inside of the outer housing 20 by using the waste heat of the air inside the storage room 1 to be ventilated, A ventilation part 70 installed to communicate with the inside of the outer housing 20;
Wherein the cooling system includes a ventilation structure.
The method according to claim 1,
The ventilating unit 70 is installed in the other wall facing one side wall of the storage room 1 where the ventilating unit 70 is installed, So that the air in the storage space (1) flows into the storage room (1), and the air in the storage room (1) is closed by the self weight during the disappearance of the negative pressure applied to the inside of the storage room And an air inlet damper (2) for preventing the air from flowing back to the outside.
The ventilator according to claim 2,
A ventilation fan 71 located inside one side wall of the storage room 1 and discharging the air inside the storage room 1 to the outside of the storage room 1;
The ventilation fan 71 is disposed outside the one side wall of the storage room 1 and communicates with the outer housing 20. The ventilation fan 71 is opened when the ventilation fan 71 is in operation, 20. The integrated cooling system as claimed in claim 1, wherein the ventilation structure comprises a ventilation structure.
The method of claim 3,
A first collecting part 100 installed at a lower part of the evaporator 30 and collecting drain water generated by a temperature difference between the inside and the outside of the evaporator 30;
A drain pipe 110 having one end connected to the first collecting unit 100 to drain the drain water collected by the first collecting unit 100;
The compressor 40 is installed at a lower portion of the compressor 40 and accommodates a part of the first refrigerant pipe 130 connecting the compressor 40 and the condenser 50 and is connected to the other end of the drain pipe 110 A second collecting part 120 collecting the drain water drained by the drain pipe 110 and causing the collected drain water to be heat-exchanged with the accommodated first refrigerant pipe 130 to evaporate;
Further comprising a ventilating structure for cooling the ventilating structure.
5. The method of claim 4,
And a separate receiver (190) for storing the low-temperature low-pressure refrigerant condensed and condensed by the condenser (50) and moving the stored refrigerant to the expansion valve (60) Integrated cooling system.
6. The method of claim 5,
A third collecting unit 160 provided at a lower portion of the second collecting unit 120 and collecting the remaining drain water evaporated in the second collecting unit 120;
A spray pump 170 connected to the third collecting unit 160 to pump the collected drain water;
An injection nozzle 180 for injecting the drain water pumped by the injection pump 170 into the condenser 50;
Wherein the ventilation structure is further provided with a ventilation structure.
7. The compound according to any one of claims 4 to 6,
A first branch pipe 145 branched on a second refrigerant pipe 140 connecting the condenser 50 and the expansion valve 60 and connected to the evaporator 30, A solenoid valve 200 for allowing some of the refrigerant condensed and liquefied in the condenser 50 to flow through the condenser 50 by opening the condenser 50 in order to remove condensation caused by freezing of water generated by temperature difference in the refrigerant pipe and the evaporator accommodated in the condenser 50, ;
A part of the third branch pipe 145 connecting the evaporator 30 and the compressor 40 is accommodated in the rear of the solenoid valve 200, A heat exchanger 210 for exchanging heat between the refrigerant flowing in the one-minute pipe 145 and the refrigerant flowing in the third refrigerant pipe 150;
Wherein the cooling system further comprises a ventilation structure.
8. The method of claim 7,
The refrigerant heat exchanger 210 is disposed on the first branch pipe 145 located at the downstream end of the heat exchanger 210 and is located below the evaporator 30. The refrigerant heat- And a coil-shaped coil pipe (220) for heating the cooling coil (30).
7. The compound according to any one of claims 4 to 6,
A second branch pipe 135 connected to the compressor 40 and the condenser 50 and branched on the first refrigerant pipe 130 located at the rear end of the second collecting unit 120 and connecting the evaporator 30, And the refrigerant pipe and the evaporator housed in the inner housing 10 are heat exchanged in the second collecting part 120 by opening the condenser to remove condensation caused by freezing of water generated due to temperature difference in the refrigerant pipe and the evaporator, A solenoid valve (200) for allowing a part of the refrigerant to flow;
A part of the second branch pipe 135 and a part of the third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40 are accommodated in the rear of the second solenoid valve 200, A heat exchanger (210) for exchanging heat between the refrigerant flowing in the second branch pipe (135) and the refrigerant flowing in the third refrigerant pipe (150);
Wherein the cooling system further comprises a ventilation structure.
10. The method of claim 9,
The refrigerant heat exchanger 210 is disposed on the second branch pipe 135 located at the rear end of the heat exchanger 210 and is located below the evaporator 30. The refrigerant heat exchanged by the heat exchanger 210 flows, And a coil-shaped coil pipe (220) for heating the cooling coil (30).
7. The compound according to any one of claims 4 to 6,
A first branch pipe 145 branched on a second refrigerant pipe 140 connecting the condenser 50 and the expansion valve 60 and connected to the evaporator 30, A solenoid valve 200 for allowing a part of the refrigerant condensed and liquefied in the condenser 50 to flow by opening the condenser 50 in order to remove condensation caused by freezing of water generated in a temperature difference in the refrigerant pipe and the evaporator accommodated in the condenser 50, ;
A suction pressure regulating valve 230 installed on a third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40 and reducing the pressure of the refrigerant evaporated by the evaporator 30 to a pressure within a predetermined range; );
Wherein the cooling system further comprises a ventilation structure.
12. The method of claim 11,
The first solenoid valve 200 is installed on the first branch pipe 145 located at the rear end of the solenoid valve 200 and is located below the evaporator 30. The solenoid valve 200 is opened by the condenser 50 And a coil-shaped coin tube (220) for partially condensing and liquefying the refrigerant to heat the evaporator (30).
7. The compound according to any one of claims 4 to 6,
A second branch pipe 135 connected to the compressor 40 and the condenser 50 and branched on the first refrigerant pipe 130 located at the rear end of the second collecting unit 120 and connecting the evaporator 30, And the refrigerant pipe and the evaporator housed in the inner housing 10 are heat exchanged in the second collecting part 120 by opening the condenser to remove condensation caused by freezing of water generated due to temperature difference in the refrigerant pipe and the evaporator, A solenoid valve (200) for allowing a part of the refrigerant to flow;
A suction pressure regulating valve 230 installed on a third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40 and reducing the pressure of the refrigerant evaporated by the evaporator 30 to a pressure within a predetermined range; );
Wherein the cooling system further comprises a ventilation structure.
14. The method of claim 13,
The second solenoid valve 200 is installed on the second branch pipe 135 located at the rear end of the solenoid valve 200 and is located below the evaporator 30. The second solenoid valve 200 is opened by opening the solenoid valve 200, And a coil-shaped coil pipe (220) for partially heating the evaporator (30) by flowing a part of the refrigerant heat-exchanged in the evaporator (120).

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