KR101060475B1 - Cooling and heating system for agricultural and aquatic products using the natural defrost - Google Patents

Abstract

PURPOSE: A cooling and heating system for produce using natural defrosting is provided to prevent temperature difference from occurring in a storeroom since defrosting is done in the space of a storing chamber and a first installation space. CONSTITUTION: A cooling and heating system for produce using natural defrosting comprises a compressor(10), a condenser(20), an expansion valve(30), an evaporator(40) and a thermo bank(50). The compressor compresses low-temperature/low-pressure gas refrigerant to high-temperature/high-pressure gas refrigerant. The condenser radiates heat from the refrigerant supplied from the compressor and condenses it to liquid refrigerant. The expansion valve adiabatic-expands the refrigerant from the condenser to low temperature and low pressure. The evaporator heat-exchanges the refrigerant supplied from the expansion valve with ambient air.

Description

Cooling and heating system for agricultural and aquatic products using the natural defrost}

The present invention relates to a cooling and heating system that can be installed at a farming and fishing area to simultaneously perform cooling of a cold storage and heating of a house for storing harvested agricultural and marine products at low temperature.

According to the 2006 state of agricultural product distribution facilities operated by the Agricultural Products Distribution Corporation, there are more than 9,000 cold storage areas for the storage and distribution of agricultural products throughout the country. Most of these cold storage rooms are housed in individual farms, and are operated separately from the heating system installed in the farm.

However, in individual farms, although the cold storage and the housing are connected, the operation of the cold storage uses electric energy and the heating of the house uses an oil boiler, so each energy is consumed separately. As a result, the increase in the installation site, the increase in the national oil energy import cost due to the use of expensive oil, the energy loss due to the low efficiency system is very large.

In addition, the refrigeration system of the current cold storage is exceeding the number of years of life, it is required to develop and disseminate the energy-saving system to replace it in accordance with the building's life.

Therefore, the present invention is to solve the above problems, the present invention by using a refrigeration cycle of the cold storage used to store the agricultural and marine products in a low temperature state of the natural defrost that can perform the use of hot water in the house and heating the room The purpose is to provide a cooling and heating system for agricultural and marine products.

Heating and cooling system for agricultural and marine products using natural defrosting of the present invention for achieving the above object,

A compressor for compressing a low temperature low pressure gas phase refrigerant into a high temperature high pressure gas phase refrigerant;

A condenser for releasing heat of the refrigerant supplied from the compressor to condense it into a liquid refrigerant;

An expansion valve for adiabatic expansion of the refrigerant from the condenser at low temperature and low pressure;

An evaporator configured to heat exchange the refrigerant supplied from the expansion valve with ambient air;

The heat storage medium, which is disposed between the compressor and the condenser and is discharged from the compressor by using a high temperature and high pressure refrigerant discharged from the compressor, is heated, and a heating pipe installed for use of hot water in a house and heating in the room is passed through and heated. A thermobank in which a heating medium moved along the heating pipe by a heat storage medium is heated;

The evaporator is disposed in the first installation space is installed on one side of the storage compartment of the cold storage for storing agricultural and marine products,

In the first installation space, the cold air heat-exchanged with the refrigerant flowing into the first installation space or into the first installation space and passing through the evaporator so that the agricultural and marine products of the storage compartment can be stored at a low temperature. First and second cooling dampers are installed to open and close again to flow out into the storage compartment,

The first installation space is introduced into the first installation space by passing the outside air through the evaporator to defrost when the frost on the evaporator in the process of storing the agricultural and aquatic products of the storage room at a low temperature, the first installation It is characterized in that the first and second air dampers that are opened and closed to flow out the heat exchanged air to the outside of the space.

The air conditioning system,

During the winter, the first and second air dampers are opened and the first and second cooling dampers are closed when heating the house.

The air-conditioning system further includes a defrost pipe connecting the rear end of the compressor and the front end of the evaporator,

The air-conditioning system is characterized in that when the frost accumulated in the evaporator in the process of heating the house during the winter season when defrosting operation is required, the high-temperature, high-pressure gaseous refrigerant passing through the compressor to the evaporator is sent to the evaporator. .

The air conditioning system,

It characterized in that it further comprises a bypass pipe provided for discharging the refrigerant performing the defrost of the evaporator from the evaporator and then moved to the compressor via the thermobank.

As described above, the air-conditioning and heating system for agricultural and marine products using the natural defrost of the present invention, as the heat storage medium is stored in the thermobank rather than using a heating device using a separate energy source in the process of cooling the cold storage. The heating can be done at the same time, but the cost is reduced.

In addition, the air-conditioning and heating system for agricultural and marine products using the natural defrosting of the present invention, the cost is reduced by using the natural defrost without the use of a separate defrost heat source in the evaporator frost in the process of cooling the low-temperature storage, the internal space of the storage room Defrost is made in the first installation space partitioned with the high temperature difference does not occur.

In addition, the air-conditioning and heating system for agricultural and marine products using the natural defrost of the present invention can be easily defrosted because the high-temperature, high-pressure gaseous refrigerant discharged from the compressor is sent to the evaporator when heating the house during the winter season.

In addition, the air-conditioning and heating system for agricultural and marine products using natural defrosting of the present invention is that the liquid refrigerant is supplied back to the compressor when the defrosting during the heating of the house during winter, the compressor is damaged to the compressor is damaged. It can prevent.

1 is a view showing a heating and cooling system for agricultural and marine products using the natural defrost of the present invention.
Figure 2 is a view showing the flow of air during cooling of the cold storage in the cooling and heating system for agricultural and marine products using the natural defrost of the present invention.
3 is a view showing the flow of air during natural defrosting and heating of the house during the cooling of the cold storage in the cooling and heating system for agricultural and marine products using the natural defrost of the present invention.

Hereinafter, with reference to the drawings will be described in detail for the heating and cooling system for agricultural and marine products using the natural defrost of the present invention.

As shown in Figure 1, the cooling and heating system for agricultural and aquatic products (hereinafter referred to as "cooling and heating system") using the natural defrosting of the present invention is the cooling and cold water storage of the cold storage 100 to store the harvested or harvested agricultural products at low temperature, hot water Applicable to the use and heating of houses heating indoors.

The cooling and heating system includes a compressor (10) for compressing a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant in order to store agricultural products of the cold storage (100) at low temperature, and the heat of the refrigerant supplied from the compressor (10). A condenser 20 for releasing and condensing into a liquid refrigerant, an expansion valve 30 for thermally expanding the refrigerant from the condenser 20 at low temperature and low pressure, and a refrigerant supplied from the expansion valve 30 to exchange heat with ambient air. It includes a conventional refrigeration cycle comprising an evaporator (40).

At this time, between the condenser 20 and the expansion valve 30, the receiver 61, which serves as a storage container for the liquid refrigerant, the dry filter 63, which serves to remove moisture and foreign matter, and the refrigerant flow. Sight glass (65) for viewing is further provided.

And reference numeral 1 is a pipe connecting between the compressor 10 and the condenser 20, reference numeral 2 is a pipe connecting between the condenser 20 and the expansion valve 30, and reference numeral 3 is expanded A pipe connecting the valve 30 and the evaporator 40, and reference numeral 4 is a pipe connecting the evaporator 40 and the compressor 10.

In the cooling and heating system, the evaporator 40 exchanges heat with ambient air, that is, air in the storage compartment 110 of the cold storage compartment 100, in the process of cooling the cold storage compartment 100 as described above. It plays a role.

To this end, as illustrated in FIGS. 1 and 2, the internal air in the vicinity of the evaporator 40 is forcedly circulated so that the internal air of the storage compartment 110 of the low temperature reservoir 100 exchanges with the refrigerant passing through the evaporator 40. Blowing fan is provided. The evaporator 40 and the blower fan are installed in the first installation space 120 that is installed at one side of the storage compartment 110.

In other words, in the present invention, one side of the storage compartment 110 is provided with a first installation space 120 in which the evaporator 40 and the blowing fan are installed to maintain the inside of the storage compartment 110 at a low temperature.

The internal air of the storage compartment 110 flows into the first installation space 120 or enters the first installation space 120 on the wall partitioning the first installation space 120 and the storage compartment 110. First and second cooling dampers 111 and 113 are installed to open and close so that the cool air heat-exchanged with the refrigerant passing through the outlet flows back into the storage compartment 110.

Meanwhile, in the present invention, the internal air of the storage compartment 110 is cooled on the surface of the evaporator 40 while passing through the evaporator 40 installed in the first installation space 120 when the low temperature reservoir 100 is cooled. Can interfere.

This is because the internal air introduced from the storage compartment 110 through the first cooling damper 111 has a temperature relatively higher than the surface temperature of the evaporator 40, condensed water is implanted, and the frost caused by the above conception causes the internal air flow to flow. Because it interferes.

In order to prevent the case as described above, in the present invention, the outside air flows into the first installation space 120 in which the evaporator 40 is installed at one side of the storage compartment 110, and then passes through the evaporator 40. First and second air dampers 121 and 123 are installed to open and close to flow out of the 120.

The first outdoor air damper 121 has a second installation space 130 in which the compressor 10, the condenser 20, and the thermobank 50 to be described later are installed, and the first installation space 120 in which the evaporator 40 is installed. It is installed on the wall partitioning the door. Here, the second installation space 130 corresponds to the machine room of the apparatus using a normal refrigeration cycle, and the machine room at this time is in a state of communicating with the outside.

The second outdoor air damper 123 is installed on the wall partitioning the external space of the cold storage 100 and the first installation space 120.

That is, in order to defrost frost formed on the evaporator 40 in the process of cooling the cold storage 100, the first and second cooling dampers 111 and 113 are closed and the first and second air dampers 121 and 123 are opened to warm the outside air. It is made by introducing into the first installation space (120).

Accordingly, in the present invention, the cost is reduced by using a natural defrost without the use of a separate defrost heat source in the frost formed on the evaporator 40 in the process of cooling the cold storage 100, the internal space of the storage compartment 110 Defrost is made in the first installation space 120 partitioned with the high temperature difference does not occur.

In addition, the first and second air dampers 121 and 123 are opened when the home heating is performed for the use of hot water and heating the room during the winter season as shown in FIG. 3, and the first and second cooling dampers ( 111 and 113 are closed.

On the other hand, the cooling and heating system of the present invention further includes a thermobank (Thermobank, 50) disposed between the compressor 10 and the condenser 20 as shown in FIG. In other words, the high temperature and high pressure refrigerant discharged from the compressor 10 is passed through the thermobank 50 in the process of being moved to the condenser 20.

In the thermobank 50, a heat storage medium, for example, water is stored, and the water is heated in the process of moving the high temperature and high pressure refrigerant passing through the compressor 10 to the condenser 20 as described above.

And the inside of the thermobank 50 is passed through the heating pipe 210 is installed for the use of hot water in the house and the heating of the room, that is, the house as shown. On the heating pipe 210, a heating medium moved through the heating pipe 210, for example, a circulation pump 220 for circulating water is installed, and the heating pipe 210 by such a circulation pump 220. Heating medium moving on the) is heated when passing through the thermobank 50 may use hot water or to heat the room.

Accordingly, in the cooling and heating system of the present invention, the thermo-bank 50 of the refrigeration cycle used to cool the low-temperature store 100, rather than using a heating device using a separate energy source in the process of cooling the low-temperature store 100. By using the heat storage medium that is stored in the hot water use and heating the room can be reduced costs.

In addition, the cooling and heating system of the present invention, when performing the heating of the house during the winter season, as shown in Figure 1 and 3, the high-temperature high-pressure refrigerant discharged from the compressor 10 is condensed by heat exchange in the thermobank (50) The refrigerant condensed in this manner bypasses the condenser 20 and enters the receiver 61. And the refrigerant entering the receiver 61 is moved to the expansion valve (30).

In the above process, the first and second air dampers 121 and 123 are opened and the first and second cooling dampers 111 and 113 are closed to discharge the air cooled in the evaporator 40 to the outside. That is, the evaporator 40 serves as an outdoor unit when heating the house.

To this end, a pipe between the thermobank 50 and the condenser 20 and a pipe between the condenser 20 and the receiver 61 to bypass the condenser 20 on the pipe connecting the compressor 10 and the condenser 20. It includes a bypass pipe (5) for connecting.

In addition, the cooling and heating system of the present invention sends a high-temperature, high-pressure gaseous phase refrigerant passing through the compressor 10 to the evaporator 40 when defrosting is accumulated in the evaporator 40 during the heating of the house during the winter season. Remove frost The refrigerant converted into the liquid state by performing the defrost of the evaporator 40 is discharged again from the evaporator 40 and then passed through the thermo-bank 50 so that the refrigerant is phase-changed back to the gas state and then moved to the compressor 10.

To this end, a defrost pipe 7 is connected between the rear end of the compressor 10 and the front end of the evaporator 40. On the defrost pipe (7), a three-way valve (68) for selectively opening and closing the defrost pipe (7) is provided. On the pipe 4 connecting the evaporator 40 and the compressor 10, two points on the pipe 4 are connected and bypassed, but another bypass pipe 6 through the thermobank 50 is connected. do. At the rear end of the bypass pipe 6, a three-way valve 69 for selectively opening the pipe 4 and the bypass pipe 6 between the evaporator 40 and the compressor 10 is provided.

Accordingly, the cooling and heating system of the present invention converts the liquid refrigerant which has been defrosted when performing heating of the house during the winter season to the air refrigerant, so that the liquid refrigerant is supplied back to the compressor 10 and the compressor 10 is damaged. You can prevent it.

Hereinafter, with reference to the drawings will be described in detail the operation of the air conditioning system of the present invention.

First, the process of cooling the cold storage 100 is as follows.

The refrigerant having a low temperature and low pressure while passing through the expansion valve 30 is converted into steam by heat exchange in the evaporator 40, and the refrigerant converted into steam is sucked into the compressor 10 and compressed at high temperature and high pressure. The compressed refrigerant is introduced into the condenser 20 after heating the heat storage medium inside the thermobank 50 while passing through the thermobank 50, and the refrigerant that is heat-exchanged with the ambient air in the condenser 20 changes phase into a liquid phase. And enters the receiver 61. The refrigerant of the receiver 61 is filtered by the dry filter 63 and enters the expansion valve 30 to circulate the above process.

In the circulation process, the refrigerant passing through the evaporator 40 is heat-exchanged with the internal air of the storage compartment 110 introduced through the opening of the first cooling damper 111, and thus the cold heat exchanged through the evaporator 40 is The second cooling damper 113 flows back into the storage compartment 110 again. At this time, the first and second air dampers 121 and 123 are in a closed state.

In addition, while the internal air of the storage compartment 110 passes through the evaporator 40 in the circulation process, it may be implanted on the surface of the evaporator 40. In this case, the first and second cooling dampers 111 and 113 are closed and the first air is closed. The frost formed on the evaporator 40 can be easily removed by using the outside air moved through the first and second outside air dampers 121 and 123 by opening the second outside air dampers 121 and 123.

That is, in the present invention, the cost is reduced by using the natural defrost instead of using a separate defrost heat source in the frost formed on the evaporator 40 in the process of cooling the cold storage.

In addition, the refrigerant passing through the compressor 10 passes through the thermobank 50 in the circulation process, and the refrigerant passing through the thermobank 50 thus heats the heat storage medium in the thermobank 50. The heated heat storage medium heats the heating medium on the heating pipe 210 passing through the thermobank 50, and the heated heating medium is used for hot water and heating of the house.

That is, in the present invention, in the process of cooling the cold storage 100, the temperature of the storage article of the cold storage is determined by using the heat storage medium that is stored in the thermobank 50, rather than using a heating device using a separate energy source. In addition to maintaining a constant, it has the effect of reducing the cost of energy saving.

On the other hand, the process of heating a house that performs the use of hot water and indoor heating is as follows.

The refrigerant compressed at high temperature and high pressure while passing through the compressor 10 is condensed while passing through the thermobank 50, and the condensed refrigerant bypasses the condenser 20 and enters the receiver 61. The refrigerant entering the receiver 61 is filtered by the dry filter 63 and then enters the expansion valve 30. The refrigerant, which has been low temperature and low pressure while passing through the expansion valve 30, is heat-exchanged in the evaporator 40 to be converted into steam. do. And the refrigerant heat exchanged in the evaporator 40 is moved to the compressor 10 again to circulate the above process.

 In the circulation process, since the first and second air dampers 121 and 123 are opened and the first and second cooling dampers 111 and 113 are in a closed state, the air cooled in the evaporator 40 is discharged to the outside. That is, the evaporator 40 serves as an outdoor unit.

In addition, in the circulation process, outside air may pass on the surface of the evaporator 40 while passing through the evaporator 40. In this case, the high-temperature, high-pressure gas phase refrigerant passing through the compressor 10 may be defrosted. It is sent to the evaporator 40 again to remove the frost formed on the surface of the evaporator 40. The refrigerant converted into the liquid state by performing the defrost of the evaporator 40 is discharged again from the evaporator and then passed through the thermo-bank 50 using the bypass pipe 6 to change the phase back to the gas state and then to the compressor. Is moved.

That is, in the present invention, the liquid refrigerant, which has been defrosted in the evaporator 40 during the heating of the house, is converted into an air coolant and then moved to the compressor 10, so that the liquid refrigerant is supplied to the compressor again and the compressor 10 is damaged. It can be prevented, the temperature rise in the storage compartment 110 due to defrosting and the operating time of the compressor 10 is shortened to reduce the cost.

In addition, if the internal temperature of the storage compartment 110 is increased in the circulation process and cooling is required, the first and second air dampers 121 and 123 are closed and the first and second cooling dampers 111 and 113 are opened. At the same time by operating the circulation pump 220 on the heating pipe 210 to heat the heating medium on the heating pipe 210 in the thermobank (50).

1,2,3,4: Piping of refrigeration cycle 5,6: Bypass piping of refrigeration cycle
7: defrost pipe 10: compressor
20 condenser 30 expansion valve
40: evaporator 50: thermobank
61: receiver 63: dry filter
67,68,69: three-way valve 100: low temperature storage
110: storage compartment 111,113: 1st, 2nd cooling damper
120: first installation space 121,123: first and second air dampers
130: second installation space 210: heating piping
220: circulation pump

Claims (4)

A compressor (10) for compressing the low-temperature low-pressure gas phase refrigerant into a high-temperature high-pressure gas phase refrigerant,
A condenser 20 for releasing heat of the refrigerant supplied from the compressor 10 and condensing it with liquid refrigerant;
An expansion valve (30) for adiabatic expansion and expansion of the refrigerant from the condenser (20) at low temperature and low pressure;
An evaporator 40 for exchanging heat from the refrigerant supplied from the expansion valve 30 with the surrounding air;
The heat storage medium is disposed between the compressor 10 and the condenser 20 to be delivered therein by using a high temperature and high pressure refrigerant discharged from the compressor 10, and is used for using hot water in a house and heating the room. It includes a thermobank (50) is heated heating medium which is moved along the heating pipe 210 by the heat storage medium is passed through the heating pipe 210 to be installed,
The evaporator 40 is disposed in the first installation space 120 is installed on one side of the storage compartment 110 of the cold storage 100 for storing agricultural and marine products,
In the first installation space 120, the internal air of the storage compartment 110 is introduced into the first installation space 120 or the first installation space 120 to store the agricultural and marine products of the storage compartment 110 at a low temperature. 1 and 2 cooling dampers 111 and 113 are installed to open and close to cool the heat exchanged with the refrigerant flowing into the evaporator 40 to flow back to the storage compartment 110.
In the first installation space 120, the outside air to the first installation space 120 to be defrosted when frost on the evaporator 40 in the process of storing the agricultural and aquatic products of the storage compartment 110 at a low temperature After passing through the evaporator 40, the first and second air dampers 121 and 123 are opened and closed to discharge the heat exchanged heat to the outside of the first installation space 120. Heating and cooling system for agricultural and marine products. The method of claim 1,
The air conditioning system,
Heating and cooling system for agricultural and marine products using natural defrosting characterized in that the first and second air dampers (121,123) and the first and second cooling dampers (111,113) are closed when heating the house during the winter season. The method according to claim 1 or 2,
The cooling and heating system further includes a defrost pipe (7) connecting the rear end of the compressor 10 and the front end of the evaporator 40,
The cooling and heating system is a high-temperature, high-pressure gas phase refrigerant passing through the compressor (10) by using the defrost pipe (7) when defrosting is required due to frost accumulated in the evaporator (40) during the heating of the house during the winter season. Heating and cooling system for agricultural and marine products using natural defrosting, characterized in that to send to the evaporator (40). The method of claim 3,
The air conditioning system,
It further comprises a bypass pipe (6) provided for discharging the refrigerant performing the defrost of the evaporator 40 from the evaporator 40 and then moved to the compressor 10 via the thermobank (50). Heating and cooling system for agricultural and marine products using natural defrosting.

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