KR101670233B1 - Unified Freezing and Refrigerating System for Space Application - Google Patents

Abstract

The integrated cooling system for space utilization of the present invention comprises a storage room (1) in which a through hole (1b) passing through a ceiling (1a) is formed; An outer housing 20 having a cross-sectional area larger than the through-hole 1b of the storage bin 1 and being mounted on the upper portion of the through-hole 1b of the storage bin 1; A sealing part 15 which contacts the lower end of the outer housing 20 and is inserted into the through hole 1b of the storage container 1 to seal the through hole 1b; An inner housing 10 fixed to the lower portion of the sealing portion 15 so as to face the outer housing 20; An evaporator (30) installed in the inner housing (10); A compressor (40) installed in the outer housing (20); A condenser (50) installed in the outer housing (20); An expansion valve (60) installed in the inner housing (10); The ceiling 1a of the storage bin 1 or the hermetically sealed portion 15 is provided to communicate with the inside of the outer housing 20 and is installed in the storage room 1, (1) a ventilation part (70) for cooling the condenser (50) by using waste heat of the internal air; And a control unit.

Description

{Unified Freezing and Refrigerating System for Space Application}

The present invention relates to an integrated cooling system for space utilization, and more particularly, to an integrated cooling system for space utilization that maximizes space utilization by installing a cooling device on a ceiling of a storage space.

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.

In addition, since the above-mentioned patents are installed inside and outside the wall of the storage room, space utilization of the storage room is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an integrated cooling system for space utilization that maximizes space utilization inside and outside of a storage room.

It is another object of the present invention to provide an integrated cooling system for space utilization that improves the efficiency of the overall system by using waste heat that is discarded when ventilating the storage room.

Another object of the present invention is to provide an integrated cooling system for space utilization, which is arranged 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.

It is still another object of the present invention to provide an integrated cooling system for space utilization, in which the drain water generated by the temperature difference in the evaporator and drained to the outside, and the defrost water generated from condensation at the time of defrosting are evaporated using waste heat will be.

The integrated cooling system for space utilization according to the present invention comprises: a storage room (1) in which a through hole (1b) passing through a ceiling (1a) is formed; An outer housing 20 having a cross-sectional area larger than the through-hole 1b of the storage bin 1 and being mounted on the upper portion of the through-hole 1b of the storage bin 1; A sealing part 15 which contacts the lower end of the outer housing 20 and is inserted into the through hole 1b of the storage container 1 to seal the through hole 1b; An inner housing 10 fixed to the lower portion of the sealing portion 15 so as to face the outer housing 20; 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 the outer housing (20) for compressing the refrigerant vaporized in the evaporator (30) to bring the refrigerant into a high temperature and high pressure state; A condenser (50) installed in 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 cooling the condenser 50 provided in the outer housing 20 by using the waste heat of the air inside the storage 1 to be ventilated to cool the condenser 50 A ventilation part 70 installed in the ceiling 1a or the sealing part 15 of the storage room 1 so as to improve the efficiency of the indoor space and to be connected to the inside of the outer housing 20; And a control unit.

The ventilation part 70 is installed in the ceiling 1a of the storage room 1 or the sealing part 15 to discharge the cold air inside the storage room 1 to the outside of the storage room 1 The ventilation fan 71 is installed at an upper portion of the ventilation fan 71 and communicates with the outer housing 20. The ventilation fan 71 is opened when the ventilation fan 71 is in operation, And an air discharge damper (72) for preventing air in the inside of the outer housing (20) from flowing back into the reservoir (1).

The ventilation part 70 may be installed to communicate with the inside of the outer housing 20 adjacent to the condenser 50 so as to cool the condenser 50, And is connected to the inside of the outer housing (20).

The ventilating unit 70 is installed at one side wall of the storage room 1 and is opened by the negative pressure applied to the inside of the storage room 1 when ventilating the inside of the storage room 1 by the ventilating unit 70, An air inflow damper (not shown) for preventing the air inside the storage room 1 from flowing back to the outside of the storage room 1 due to self weight during the disappearance of the negative pressure applied to the inside of the storage room 1, 2) is further provided.

In addition, the condenser 50 stores low-temperature and low-pressure refrigerant condensed and liquefied to the inner lower portion, and simultaneously performs the function of the receiver.

In addition, the condenser 50 is inclined, and the inclination angle of the condenser 50 is 30 to 50 degrees.

A drainage unit 100 installed at a lower portion of the evaporator 30 for draining drain water generated by a temperature difference between the inside and the outside of the evaporator 30; A drain pipe 110 connected to the drainage unit 100 to drain the drain water to the outside of the storage tank 1; A first collecting part 111 installed below the drainage part 100 and collecting drain water drained by the drainage pipe 110; A drain pump 115 for pumping drain water collected in the first collecting part 111; A transfer pipe 113 for transferring drain water pumped by the drain pump 115; An injection nozzle 180 for injecting the drain water transferred by the transfer pipe 113 into the condenser 50 to cool the condensed water; The compressor 40 is installed at a lower portion of the compressor 40 and accommodates a portion of the first refrigerant pipe 130 connecting the compressor 40 and the condenser 50. The refrigerant is injected by the injection nozzle 180, And a second collecting part 120 collecting the drain water that has cooled the first refrigerant pipe 50 and causing the collected drain water to be heat-exchanged with the received first refrigerant pipe 130 to be evaporated.

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 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.

The solenoid valve 200 is disposed on the first branch pipe 145 located at the rear end of the solenoid valve 200 and is disposed in proximity to the evaporator 30. The solenoid valve 200 opens the condenser 50 And a coil-shaped coil pipe 220 for partially condensing and liquefying the refrigerant in the evaporator 30 to heat the evaporator 30.

The second branch pipe (130) is 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 part (120) 135 and the refrigerant pipe accommodated in the inner housing 10 and the second reservoir 120 by the defrosting to remove condensation caused by freezing of water generated by temperature difference in the evaporator, A solenoid valve 200 for allowing a part of refrigerant heat-exchanged in the refrigerant circuit 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.

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 installed in proximity to the evaporator 30. When the solenoid valve 200 is opened, And a coil-shaped coil pipe (220) for heating a part of the refrigerant heat-exchanged in the receiver (120) to heat the evaporator (30).

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; May be further included.

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 installed close to the evaporator 30. The refrigerant heat exchanged by the heat exchanger 210 flows And a coil-shaped coil pipe (220) for heating the evaporator (30).

The second branch pipe (130) is 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 part (120) 135 and the refrigerant pipe accommodated in the inner housing 10 and the second reservoir 120 by the defrosting to remove condensation caused by freezing of water generated by temperature difference in the evaporator, A solenoid valve 200 for allowing a part of refrigerant heat-exchanged in the refrigerant circuit 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 end of the 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 installed close to the evaporator 30. The refrigerant heat-exchanged by the heat exchanger 210 flows And a coil-shaped coil pipe (220) for heating the evaporator (30).

Unlike the conventional cooling system in which the space utilization of the storage space is small due to the housings installed inside and outside the wall of the storage space, since the housings are provided on the inside and outside of the ceiling, the space of the storage space can be utilized positively .

In addition, the present invention can improve the efficiency of the entire system by improving the efficiency of the condenser by cooling the condenser using the waste heat that is discarded during ventilation of the storage compartment. In addition, when the condenser is disposed, it can be disposed at an optimum inclination angle, so that the cooling efficiency of the receiver and the condenser and the refrigerant storage capacity of the condenser can be improved. 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.

1 is a view illustrating an internal structure of an integrated cooling system for space utilization according to the present invention.
FIG. 2 is a view illustrating operation of the integrated cooling system for ventilation according to the present invention.
3 is a front view of an integrated cooling system for space utilization according to the present invention.
4 is a side view of an integrated cooling system for space utilization according to the present invention.
FIG. 5 is a schematic view of an integrated cooling system for space utilization according to the present invention.
6 to 9 are diagrams illustrating the operation of the integrated cooling system for space utilization according to the present invention.

Hereinafter, an integrated cooling system for space utilization of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a view showing the internal structure of an integrated cooling system for space utilization according to the present invention, FIG. 2 is a view showing an operation of ventilation of an integrated cooling system for space utilization according to the present invention, FIG. 4 is a side view of an integrated cooling system for space utilization according to the present invention. FIG. 5 is a schematic view of an integrated cooling system for space utilization according to the present invention. And FIGS. 6 to 9 illustrate operations of the integrated cooling system for space utilization according to the present invention.

The integrated cooling system for space utilization 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.

The integrated cooling system for space utilization according to the present invention includes an evaporator 30, a compressor 40, a condenser 50, and a condenser 50 used in the most basic general refrigeration cycle, as shown in FIGS. 1, 2, , And an expansion valve (60).

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

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

In the storage room 1, a through hole 1b is formed through the ceiling 1a. A through-hole 15 to be described later is inserted into the through-hole 1b to seal the through-hole 1b. The sealing portion 15 is preferably made of a heat insulating material.

The outer housing 20 has a larger cross sectional area than the through hole 1b of the storage bin 1 and is mounted on the upper portion of the through hole 1b of the bin 1 as shown in FIGS. The inner housing 10 is fixed to the lower portion of the sealing portion 15 so as to face the outer housing 20.

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.

In addition, unlike the conventional cooling system in which the space utilization of the storage space is small due to the housings installed inside and outside the wall of the storage room, the housings are installed on the inside and the outside of the ceiling, .

3 and 4, the inner housing 10 and the outer housing 20 are connected to each other by a sealing portion 15, and the sealing portion 15 covers the ceiling 1a of the storage room 1 Is inserted into the through hole (1b) formed so as to pass therethrough.

1 to 2 and FIGS. 6 to 9, a ventilation part 70 for ventilating the inside of the storage room 1 is provided in the ceiling 1a of the storage room 1 in which the inner housing 10 is installed . The ventilation part 70 is installed to communicate with the inside of the outer housing 20.

The ventilation part 70 is installed on the ceiling 1a of the storage room 1 or the sealing part 15 so as to communicate with the inside of the outer housing 20, To cool the inside of the outer housing 20 by using the waste heat of the air inside the storage space 1 that is ventilated by ventilating the condenser 50, thereby improving the efficiency of the condenser 50.

1 and 2, the ventilation unit 70 includes a ventilation fan 71 and an air discharge damper 72. [

The ventilation fan 71 is provided in the ceiling 1a of the storage room 1 or the sealing part 15 and serves to discharge the air inside the storage room 1 to the outside of the storage room 1 during ventilation , And the ceiling (1a) of the storage room (1) or the sealing part (15).

The air discharge damper 72 is disposed above the ventilation fan 71 and communicates with the outer housing 20. The ventilation fan 71 is opened when the ventilation fan 71 is in operation, So that the air inside 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. [ The cooling air is flowed by the operation of the ventilation fan 71, and the air to be flowed is discharged into the outer housing 20 by rotating the air discharge damper 72 hinged to one side. 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.

For this purpose, the storage room 1 is installed on one side wall of the storage room 1 and when the air in the storage room 1 is ventilated by the ventilation part 70, (1) is opened by the negative pressure applied to the inside of 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 1) an air inflow damper 2 for preventing backflow to the outside.

A negative pressure is applied to the inside of the storage tank 1 when the ventilation fan 71 is operated to vent the air and the air discharge damper 72 is opened and the air inflow damper 2 installed in the ceiling 1a of the storage tank 1, As shown in Fig. 2, air is introduced 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 air discharge damper 72 of the ventilation unit 70 is installed to communicate with the inside of the outer housing 20 adjacent to the condenser 50 so as to cool the condenser 50, And the inner housing 20 is disposed to be in communication with the inside of the outer housing 20 located at a lower portion of the outer housing 20.

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. When the cooling fan 51 is installed so as to communicate with the inside of the outer housing 20 adjacent to the condenser 50, the cooling air is cooled by the ventilation part 70 by the discharging operation of the cooling fan 51, It is preferable that the ventilation part 70 is installed so as to communicate with the inside of the outer housing 20 located under the condenser 50 because the time and area of contact with the condenser 50 may be small .

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 or the outer housing 20 and reduces the refrigerant under the low temperature and pressure state converted by the condenser 50 by an alternating action to the evaporator 30 It plays the role of sending.

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. In order to treat this moisture, the present invention comprises, as in Figs. 1 and 2, a drainage section 100; The drain pipe 110, the first collecting unit 111, the drain pump 115, the transfer pipe 113, the spray nozzle 180, and the second collecting unit 120 are provided.

The drainage unit 100 is installed at a lower portion of the evaporator 30 to drain the drain water generated by the temperature difference between the inside and the outside of the evaporator 30.

The drain pipe 110 is connected to the drainage unit 100 to drain the drain water to the outside of the storage tank 1.

The first collecting part 111 is installed outside the storage room 1 and collects drain water drained by the drain pipe 110 installed at a lower level than the drainage part 100.

The drain pump 115 pumps the drain water collected in the first collecting part 111.

The transfer pipe 113 serves to transfer the drain water pumped by the drain pump 115.

The injection nozzle 180 injects the drain water transferred by the transfer tube 113 into the condenser 50 to cool it.

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, The condensed water discharged from the condenser 50 is collected by the condenser 180, and the collected drain water is heat-exchanged with the received first refrigerant pipe 130 to evaporate the condensed water. The second collecting part 120 is provided in a plate shape having a predetermined height.

The drain water flowing down from the evaporator 30 due to the temperature difference between the evaporator 30 and the evaporator 30 is drained by the drainage unit 100 and the drained drainage water is drained by the drainage pipe 110 And is discharged to the first collecting part 111. The drained drain water is pumped by the drain pump 115 and is conveyed to the injection nozzle 180 through the transfer pipe 113 and is injected by the injection nozzle 180 to cool the condenser 50, The drain water that has cooled the condenser 50 is collected by the second collecting part 120.

Since the present invention cools the condenser 50 by the injection nozzle 180, the efficiency of the condenser can be increased. If the efficiency of the condenser 50 is improved by cooling the condenser 50 by spraying the low-temperature water, the efficiency of the cooling system according to the present invention can be improved.

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 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 drain water collected by the second collecting unit 120 through the heat exchange The drain water evaporates.

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.

Reference numeral 112 denotes a drain valve for draining the drain water collected by the first accumulator 111 when it is not necessary to cool the condenser 50 because the surrounding temperature is low as in winter.

A cooling fan 51 for cooling the condenser 50 by discharging the air inside the outer housing 20 is provided at an upper portion of the outer housing 20 at an upper portion of the condenser 50. The cooling fan 51 ) Is discharged into the atmosphere. 1 and 2, the cooling fan 51 is shown at the upper portion of the condenser 50 to facilitate understanding. However, the installation of the cooling fan 51 is installed at the upper portion of the outer housing 20. At this time, since the air inside the outer housing 20 is hot air, it is moved upward. In order to increase the cooling efficiency of the cooling fan 51, the condenser 50 is installed laterally as shown in FIG. 1 and FIG.

The condenser 50 is transformed into a low-temperature and low-pressure state by being liquefied and liquefied, and the converted refrigerant is stored in the lower portion of the inner side of the condenser 50 to perform a role of a receiver.

At this time, in order to increase the refrigerant storage capacity of the condenser, the angle at which the condenser 50 is laid sideways, that is, the inclination angle of the condenser 50 is limited, in consideration of the cooling efficiency of the cooling fan 51.

The inclination angle of the condenser 50 according to the present invention is preferably 30 to 50 degrees.

If the inclination angle of the condenser 50 is less than 30 degrees, the cooling efficiency of the condenser 50 by the cooling fan 51 is good, but the refrigerant storage capacity of the condenser becomes small.

When the inclination angle of the condenser 50 exceeds 50 degrees, a part of the air in contact with the condenser 50 is moved upward without passing through the cooling fan 51, The cooling efficiency of the heat exchanger 50 is lowered.

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

5 shows the inner housing 10 installed on the inner side of the ceiling 1a of the storage bin 1 and the outer housing 20 provided on the outer side of the ceiling la of the storage bin 1, Which is the same as Fig.

The configuration and defrosting method of the apparatus for the first 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.

In addition, the present invention is characterized in that it is installed on the second branch pipe 135 located at the rear end of the solenoid valve 200 and is installed in the vicinity of the evaporator 30, and the 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 second method is a method using the solenoid valve 200 and the suction pressure control valve 230 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.

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

The second refrigerant pipe 130 is connected to the compressor 40 and the condenser 50 and is connected to the evaporator 30 by branching on the first refrigerant pipe 130 located at the rear end of the second condenser 120, A solenoid valve 200 is installed on the branch pipe 135 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 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 installed on the second branch pipe 135 located at the rear end of the solenoid valve 200 and is installed in proximity to 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.

The third 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 installed on the first branch pipe 145 located at the rear end of the heat exchanger 210 and installed close to 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 for the third 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 installed close to the evaporator 30. 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 fourth method is a method using the solenoid valve 200 and the heat exchanger 210 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.

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 solenoid valve 200 and is connected to a portion of the second branch pipe 135 and a third refrigerant pipe 150 connecting the evaporator 30 and the compressor 40 And serves to heat the refrigerant flowing in the second branch pipe 135 and the refrigerant flowing in the third refrigerant pipe 150 from each other.

The configuration and defrosting method of the fourth defrosting apparatus 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 installed close to the evaporator 30. 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.

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: drain part 110: drain pipe
111: first collecting part 112: drain valve
113: Feed pipe 115: Drain pump
120: second collecting part 130: first refrigerant pipe
140: second refrigerant piping 145: branch pipe
150: third refrigerant pipe 180: injection nozzle
200: Solenoid valve 210: Heat exchanger
220: Coil tube 230: Suction pressure regulating valve
240: Filter dryer

Claims (15)

delete delete delete (1) in which a through hole (1b) passing through a ceiling (1a) is formed;
An outer housing 20 having a cross-sectional area larger than the through-hole 1b of the storage bin 1 and being mounted on the upper portion of the through-hole 1b of the storage bin 1;
A sealing part 15 which contacts the lower end of the outer housing 20 and is inserted into the through hole 1b of the storage container 1 to seal the through hole 1b;
An inner housing 10 fixed to the lower portion of the sealing portion 15 so as to face the outer housing 20;
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 the outer housing (20) for compressing the refrigerant vaporized in the evaporator (30) to bring the refrigerant into a high temperature and high pressure state;
A condenser (50) installed in 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
The condenser 50 is cooled by cooling the cold air in the storage 1 and using the waste heat of the air in the storage 1 to be ventilated to cool the condenser 50 provided inside the outer housing 20, And a ventilation part 70 installed in the ceiling 1a of the storage room 1 or in the hermetically sealed part 15 so as to improve the efficiency and in communication with the inside of the outer housing 20, ,
The ventilation part (70)
A ventilation fan 71 installed on the ceiling 1a of the storage room 1 or the enclosure 15 to discharge the cold air inside the storage room 1 to the outside of the storage room 1,
The ventilation fan 71 is installed at the upper portion of the ventilation fan 71 and communicates with the outer housing 20. The ventilation fan 71 is opened when the ventilation fan 71 is in operation, And an air discharge damper (72) for preventing air in the inside of the storage tank (1) from flowing back into the storage tank (1)
The condenser 50 is installed in the outer housing 20 adjacent to the condenser 50 so as to communicate with the inside of the condenser 50 or inside the outer housing 20 located below the condenser 50, And,
And is opened at a side wall of the storage room 1 and is opened by a negative pressure applied to the inside of the storage room 1 when ventilating the inside of the storage room 1 by the ventilation part 70, 1 to prevent the air inside the storage room 1 from flowing back to the outside of the storage room 1 due to self weight during the disappearance of the negative pressure applied to the inside of the storage room 1, And a cooling system for cooling the space.
5. The method of claim 4,
Wherein the condenser (50) stores the low-temperature and low-pressure refrigerant condensed and liquefied to the inner lower portion to simultaneously perform the function of the receiver.
6. The method of claim 5,
Wherein the condenser (50) is inclined and the inclination angle of the condenser (50) is 30 to 50 degrees.
5. The method of claim 4,
A drainage unit 100 installed at a lower portion of the evaporator 30 for draining drain water generated by a temperature difference between the inside and outside of the evaporator 30;
A drain pipe 110 connected to the drainage unit 100 to drain the drain water to the outside of the storage tank 1;
A first collecting part 111 installed below the drainage part 100 and collecting drain water drained by the drainage pipe 110;
A drain pump 115 for pumping drain water collected in the first collecting part 111;
A transfer pipe 113 for transferring drain water pumped by the drain pump 115;
An injection nozzle 180 for injecting the drain water transferred by the transfer pipe 113 into the condenser 50 to cool the condensed water;
The compressor 40 is installed at a lower portion of the compressor 40 and accommodates a portion of the first refrigerant pipe 130 connecting the compressor 40 and the condenser 50. The refrigerant is injected by the injection nozzle 180, And a second collecting part (120) for collecting the drain water that has cooled the second refrigerant pipe (50) and causing the collected drain water to be heat-exchanged with the accommodated first refrigerant pipe (130) to evaporate. Integrated cooling system for use. 8. The compound according to any one of claims 5 to 7,
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; );
And a cooling system for cooling the space.
9. The method of claim 8,
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 disposed in proximity to the evaporator 30. The solenoid valve 200 is opened by the condenser 50 And a coil-shaped coil pipe (220) for partially condensing and liquefying the refrigerant to heat the evaporator (30).
8. The method of claim 7,
A second branch pipe 135 connected to the compressor 40 and the condenser 50 and branching on the first refrigerant pipe 130 located at the rear end of the second collecting unit 120 and connecting the evaporator 30 And is opened at the second collecting part 120 by means of an opening for eliminating condensation caused by freezing of water generated at a temperature difference in the refrigerant pipe and the evaporator housed in the inner housing 10, A solenoid valve (200) for allowing a part of the heat-exchanged 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; );
And a cooling system for cooling the space.
11. The method of claim 10,
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 installed in proximity to 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). 8. The compound according to any one of claims 5 to 7,
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 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;
And a cooling system for cooling the space.
13. The method of claim 12,
The refrigerant heat exchanger 210 is installed on the first branch pipe 145 located at the rear end of the heat exchanger 210 and is installed in the vicinity of the evaporator 30. The refrigerant heat- And a coil-shaped coil pipe (220) for heating the cooling coil (30).
8. The method of claim 7,
A second branch pipe 135 connected to the compressor 40 and the condenser 50 and branching on the first refrigerant pipe 130 located at the rear end of the second collecting unit 120 and connecting the evaporator 30 And is opened at the second collecting part 120 by means of an opening for eliminating condensation caused by freezing of water generated at a temperature difference in the refrigerant pipe and the evaporator housed in the inner housing 10, A solenoid valve (200) for allowing a part of the heat-exchanged 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 end of the 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);
And a cooling system for cooling the space.
15. The method of claim 14,
The evaporator 30 is installed on the second branch pipe 135 located at the rear end of the heat exchanger 210. The refrigerant heat exchanged by the heat exchanger 210 flows in the evaporator 30, And a coil-shaped coil pipe (220) for heating the cooling coil (30).

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