KR101013377B1

KR101013377B1 - Complex Heating And Cooling System

Info

Publication number: KR101013377B1
Application number: KR1020030099944A
Authority: KR
Inventors: 김성구
Original assignee: 삼성전자주식회사
Priority date: 2003-12-30
Filing date: 2003-12-30
Publication date: 2011-02-14
Also published as: KR20050068481A; CN1637352A; JP2005195313A; CN100501253C; JP3886977B2

Abstract

A composite air conditioning system is provided that includes a heat pump system and a floor heating system. The heat pump system uses carbon dioxide as a natural refrigerant, and includes a compressor connected to a refrigerant pipe, a four-way valve, an indoor heat exchanger, an expansion device, an outdoor heat exchanger, and a plurality of hot water heat exchangers. The floor heating system includes a heating water supply pipe for circulating the heating water and a heating control valve for regulating the flow of the heating water.

Description

Complex Heating And Cooling System

1 is a view showing the configuration of a complex air-conditioning system according to the present invention.

2 is a view showing an operation of performing indoor air heating, indoor floor heating, and hot water supply using a complex air conditioning system according to the present invention.

3 is a view showing an operation of performing indoor air heating and indoor floor heating using a complex air-conditioning system according to the present invention.

4 is a view illustrating an operation of performing indoor air heating and hot water supply using a complex air conditioning system according to the present invention.

5 is a view showing an operation of performing indoor floor heating and hot water supply using a complex air-conditioning system according to the present invention.

6 and 7 are views illustrating an operation of performing indoor air cooling, indoor floor heating, and hot water supply using a complex air conditioning system according to the present invention.

[Description of the Reference Numerals]

100: heat pump system

200: floor heating system

The present invention relates to a complex air conditioning system having a heat pump system for cooling and heating using a natural refrigerant and a floor heating system for heating an indoor floor using heating water.

The heat pump system is an air conditioner that cools or heats an indoor space by switching the flow of a high temperature and high pressure refrigerant discharged from a compressor.

In such a heat pump system, the indoor heat exchanger acts as an evaporator in the cooling operation, and the indoor heat exchanger acts as a condenser in the heating operation.

In the conventional heat pump system, there is a problem in that the heating capacity is insufficient when the heating operation in the cold weather outdoor temperature is low.

In conventional heat pump systems, Freon refrigerants are used. Freon refrigerants have good efficiency, but when exposed to the atmosphere, they cause environmental problems such as ozone layer destruction and global warming.

An object of the present invention is to provide a complex air-conditioning system for heating the indoor floor using a floor heating system in parallel with the operation of heating the indoor air using a heat pump system for the indoor space.

Another object of the present invention is to provide a complex air-conditioning system that is environmentally friendly without causing ozone layer destruction and global warming by using a natural refrigerant in a heat pump system.

The present invention for achieving the above object is a heat pump system for connecting a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, an expansion device and a hot water exchanger for performing heating and cooling by a refrigerant pipe; A floor heating system having a heating water supply pipe for circulating the heating water for heating the indoor space and a heating control valve for regulating the flow of the heating water, wherein the heating water is heated in the hot water supply heat exchanger. The heating water supply pipe is connected to the hot water supply heat exchanger.

The heat pump system uses a natural refrigerant, which is carbon dioxide.

The hot water heat exchanger includes a first hot water heat exchanger connected between an outlet of the compressor and the four-way valve.

The hot water heat exchanger further includes a second hot water heat exchanger connected between the four-way valve and the expansion device.

The heat pump system further includes a first three-way valve connected between the four-way valve and the second hot water heat exchanger.

The first three-way valve guides the flow of the refrigerant to perform a heating operation in the second hot water heat exchanger.

The heat pump system further includes a second three-way valve connected between the indoor heat exchanger and the expansion device.

The second three-way valve guides the flow of the refrigerant to perform indoor air heating or indoor air cooling in the indoor heat exchanger.

The heat pump system further includes a third three-way valve connected between the outdoor heat exchanger and the expansion device.

The third three-way valve guides the flow of the refrigerant to perform indoor air heating using the air heat exchanged in the indoor heat exchanger and / or to perform indoor floor heating using the heating water.

The third three-way valve guides the refrigerant passing through the expansion device to the indoor heat exchanger when the indoor air cooling is performed by using the heat exchanged air in the indoor heat exchanger.

The heat pump system further includes a first open / close valve installed between the four-way valve and the outdoor heat exchanger.

When performing indoor air cooling and indoor floor heating or hot water supply, the first opening / closing valve directs the refrigerant to the second hot water heat exchanger directly without passing the refrigerant to the outdoor heat exchanger for sufficient hot water supply.

The floor heating system further includes a boiler for reheating the heating water heated in the hot water supply heat exchanger.

The boiler is installed in a bypass pipe branched from the heating water supply pipe.

The floor heating system further includes a heat storage tank and a hot water supply pipe.

The heat storage tank is installed between the hot water supply heat exchanger and the boiler, and the heat storage tank makes hot water by heat exchange with the heating water heated in the hot water supply heat exchanger or the reheated heating water by the boiler, and the hot water supply pipe Supplies hot water.

The floor heating system further includes a pump connected to the outlet of the heat storage tank.

The pump guides the heating water exchanged in the heat storage tank to the inlet of the boiler or the inlet of the indoor space.

And a second opening / closing valve installed at the outlet side heating water supply pipe of the indoor space to control the flow of the heating water returned to the heat storage tank.

The floor heating system further includes a cold water supply pipe for supplying cold water, and connects the cold water supply pipe to the hot water supply heat exchanger to heat the cold water to produce heating water.

It further includes a third opening and closing valve for guiding the heating water produced in the hot water supply heat exchanger to the heating water supply pipe.

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

The present invention includes a heat pump system 100 and a floor heating system 200 as shown in FIG.

The heat pump system 100 uses carbon dioxide (CO ₂ ) as the natural refrigerant.

The heat pump system 100 includes a compressor 1, a four-way valve 2, an indoor heat exchanger 5, an expansion device 6, and an outdoor heat exchanger 7 connected to a refrigerant pipe CL. The compressor adopts an inverter method that can vary the capacity. The accumulator 8 is installed on the suction side of the compressor, and the indoor fan motor 9 and the outdoor fan motor 10 are respectively provided in the indoor heat exchanger and the outdoor heat exchanger to perform a blow operation for heat exchange.

The heat pump system 100 is provided with a plurality of heat exchangers 3 and 4 for hot water supply. The first hot water heat exchanger 3 is connected between the outlet of the compressor and the four-way valve 2, and the second hot water heat exchanger 4 is connected between the four-way valve 2 and the expansion device 6. The second hot water heat exchanger 4 is connected in parallel to the indoor heat exchanger 5.

The heat pump system 100 has valves for guiding the flow of the refrigerant. The first three-way valve 11 is installed at the inlet of the second hot water heat exchanger, and the second three-way valve 12 is installed at the outlet of the indoor heat exchanger 5. A third three-way valve 13 is installed between the expansion device 6 and the outdoor heat exchanger 7. A first opening / closing valve 14 is installed between the second hot water heat exchanger 4 and the outdoor heat exchanger 7.

The floor heating system 200 includes a heating water supply pipe L1 for circulating heating water heating the floor of the indoor space 21, and a heating control valve for controlling the flow of the heating water.

The floor heating system 200 further includes a heat storage tank 22 and a hot water supply pipe L2.

The heat storage tank 22 stores hot water heat exchanged by the heating water heated in the first hot water heat exchanger 3, and supplies hot water when the fifth open / close valve 29 connected to the hot water supply pipe L2 is opened. .

The floor heating system 200 further includes a boiler 24 to compensate for the lack of heating performance. Boiler 24 is connected to the heating supply pipe (L1) is installed in the bypass pipe (L4) for bypassing the heating water.

The floor heating system 200 further includes a pump 23 connected to the outlet of the heat storage tank.

The heating water supply pipe L1 is connected to the first hot water heat exchanger 3 and the second hot water heat exchanger 4, respectively. The heating water supply pipe L1 is provided with a second opening / closing valve 25 for returning the heating water that has undergone the floor heating for the indoor space. The cold water supply pipe (L3) for supplying cold water is connected to the second hot water heat exchanger, and the third open / close valve (26) for controlling the flow of heated cold water is connected to the cold water supply pipe. When the third open / close valve 26 is opened, the cold water heated by the second hot water exchanger flows into the first hot water heat exchanger 3 after the heating water flowing out through the second open / close valve joins.

The heating water supply pipe L1 is provided with a fourth opening / closing valve 27 for guiding the flow of the heating water for heating the floor of the indoor space.

The bypass pipe (L4) is provided with a fourth three-way valve 28 for guiding the flow of the heating water when bypassing the heating water heated in the boiler 24 to the heat storage tank 22 or the indoor space side.

The operation of the complex air-conditioning system according to the present invention having the above configuration will be described.

According to the present invention, the indoor air heating or cooling, floor heating, and hot water supply to an indoor space may be independently applied using the heat pump system 100 and the floor heating system 200, and various combinations of these may be achieved. An operation of performing the operation of the branch will be described with reference to FIGS. 2 to 7.

The refrigerant compressed by the compressor (1) is heated in the first hot water heat exchanger (3) by heat exchange for indoor floor heating and hot water supply. Part of the refrigerant passing through the four-way valve (2) is distributed to the second hot water heat exchanger (4) via the first three-way valve (11), and the rest to the indoor heat exchanger (5). In the second hot water heat exchanger 4, cold water is heated to supply hot water. Indoor air heating is performed by the indoor heat exchanger (5).

The refrigerant passing through the second hot water heat exchanger (4) and the refrigerant passing through the second side three-way valve (12) at the outlet side of the indoor heat exchanger (5) are the expansion device (6), the third three-way valve (13) and the outdoor heat exchanger ( Pass 7) sequentially. The refrigerant passing through the outdoor heat exchanger (7) passes through the four-way valve (2) and the accumulator (8), and then flows into the suction side of the compressor. Thus, the refrigerant circulates.

The operation of the floor heating system 200 for indoor floor heating and hot water supply will be described.

Cold water is heated in the second hot water heat exchanger (4), and the heated cold water joins the heating water flowing out of the second open / close valve (25) and flows into the first hot water heat exchanger (3). The heating water circulates through the first hot water heat exchanger (3), the heat storage tank (22), and the pump (23).

Hot water is supplied through the fifth open / close valve 29.

The boiler 24 is operated when the amount of hot water supply is insufficient or the heating capacity required for indoor floor heating is insufficient, that is, when the heat pump system 100 exceeds the heating capacity that can be supplied. The heating water reheated by the operation of the boiler is sent to the heat storage tank 22 through the fourth three-way valve 28 and part of the heating water is supplied for heating of the indoor floor.

As shown in FIG. 3, the complex cooling and heating system excludes the heating operation in the second hot water heat exchanger as the hot water is not supplied.

The refrigerant compressed by the compressor 1 is heat-exchanged in the first hot water heat exchanger 3 to heat the indoor floor, thereby heating the heating water. The refrigerant passing through the four-way valve (2) is sent to the indoor heat exchanger (5) and controls the first three-way valve (11) so as not to flow to the second hot water heat exchanger (4). In addition, the third open / close valve 26 is closed to block the cold water supply.

Indoor air heating is performed by the indoor heat exchanger (5).

The refrigerant passing through the second three-way valve 12 on the outlet side of the indoor heat exchanger 5 sequentially passes through the expansion device 6, the third three-way valve 13, and the outdoor heat exchanger 7. The refrigerant passing through the outdoor heat exchanger (7) passes through the four-way valve (2) and the accumulator (8), and then flows into the suction side of the compressor. Thus, the refrigerant circulates.

An operation of the floor heating system 200 for indoor floor heating will be described.

The heating water flowing out of the second opening / closing valve 25 flows to the first hot water heat exchanger 3. The heating water circulates through the first hot water heat exchanger (3), the heat storage tank (22), and the pump (23).

The boiler 24 is operated when the heating capacity required for indoor floor heating is insufficient, that is, when the heat pump system 100 exceeds the capacity that can be supplied. The heated water reheated by the operation of the boiler is sent to the fourth three-way valve 28 for the heating supply of the indoor floor.

As shown in FIG. 4, the combined air conditioning system does not perform indoor floor heating, and thus the second open / close valve and the fourth open / close valve are closed.

The refrigerant compressed by the compressor 1 is heat-exchanged to supply hot water in the first hot water heat exchanger 3 to heat the heating water. Part of the refrigerant passing through the four-way valve (2) is distributed to the second hot water heat exchanger (4) via the first three-way valve (11), and the rest to the indoor heat exchanger (5). In the second hot water heat exchanger 4, cold water is heated to supply hot water. Indoor air heating is performed by the indoor heat exchanger (5).

The operation of the floor heating system 200 for hot water supply will be described.

Cold water is heated in the second hot water heat exchanger (4), and the heated cold water flows into the first hot water heat exchanger (3). The heating water passes through the first hot water heat exchanger (3), the heat storage tank (22), and the pump (23), and the heating water pumped by the pump (23) circulates through the bypass pipe (24) to the heat storage tank (22). In this case, the hot water stored in the heat storage tank 22 is supplied through the fifth opening / closing valve 29.

The boiler 24 is operated when the amount of hot water supply is insufficient, that is, when the heat pump system 100 exceeds the capacity that can be supplied. The heated water reheated by the operation of the boiler is sent to the heat storage tank 22 to compensate for the insufficient hot water.

As shown in FIG. 5, the complex air-conditioning system excludes heat exchange in the indoor heat exchanger because the indoor air heating is not performed.

The refrigerant compressed by the compressor (1) is heated in the first hot water heat exchanger (3) by heat exchange for indoor floor heating and hot water supply. The refrigerant passing through the four-way valve 2 flows to the second hot water heat exchanger 4 via the first three-way valve 11.

In the second hot water heat exchanger 4, cold water is heated to supply hot water.

The refrigerant passing through the second hot water heat exchanger (4) passes sequentially through the expansion device (6), the third three-way valve (13) and the outdoor heat exchanger (7). The refrigerant passing through the outdoor heat exchanger (7) passes through the four-way valve (2) and the accumulator (8), and then flows into the suction side of the compressor. Thus, the refrigerant circulates.

Hot water is supplied through the fifth open / close valve 29.

When the amount of hot water supply is insufficient or the heating capacity required for indoor floor heating is insufficient, that is, when the heat pump system 100 exceeds the capacity that can be supplied, the boiler 24 is operated. The heating water reheated by the operation of the boiler is sent to the heat storage tank 22 through the fourth three-way valve 28 and part of the heating water is supplied for heating of the indoor floor.

6 is a view showing an operation of performing indoor air cooling, indoor floor heating, and hot water supply using a complex air conditioning system according to the present invention.

The refrigerant compressed by the compressor (1) is heated in the first hot water heat exchanger (3) by heat exchange for indoor floor heating and hot water supply. The refrigerant passing through the four-way valve 2 is sent to the second hot water heat exchanger 4 via the first opening / closing valve 14 and the first three-way valve 11.

The refrigerant passing through the second hot water heat exchanger 4 passes sequentially through the expansion device 6, the second three-way valve 12, and the indoor heat exchanger 5. At this time, the indoor heat exchanger 5 acts as an evaporator to perform indoor air cooling.

The refrigerant passing through the indoor heat exchanger (5) passes through the four-way valve (2) and the accumulator (8), and then flows into the suction side of the compressor. Thus, the refrigerant circulates.

Hot water is supplied through the fifth open / close valve 29.

7 is a view illustrating an operation of performing indoor air cooling, indoor floor heating, and hot water supply using a complex air conditioning system according to the present invention. In contrast to FIG. 6, a third three-way valve is used instead of the first open / close valve 14. It is a structure which supplies a refrigerant | coolant to the 2nd hot water supply heat exchanger 4 via the (13).

The refrigerant compressed by the compressor (1) is heated in the first hot water heat exchanger (3) by heat exchange for indoor floor heating and hot water supply. The refrigerant passing through the four-way valve (2) is sent to the outdoor heat exchanger (7). The refrigerant passing through the outdoor heat exchanger 7 is sent to the second hot water heat exchanger 4 via the third three-way valve 13 and the first three-way valve 11.

Since the operation of the floor heating system 200 for indoor floor heating and hot water supply is the same as that of FIG. 6, redundant description thereof will be omitted.

As described above, the complex air-conditioning system according to the present invention can perform indoor air cooling and heating, indoor floor heating, and hot water supply as needed, and after storing hot water in a heat storage tank using cheap electricity at night, It can be used to supply hot water, thus saving heating costs.

In the combined cooling and heating system according to the present invention, when the cooling cycle is operated in the heat pump system, the temperature of the high pressure part is reduced by performing heat exchange with cold water having a lower temperature than the outdoor air in the second hot water heat exchanger, thereby improving the efficiency of the cooling cycle.

The complex air-conditioning system according to the present invention is suitable for low-temperature heating because it can compensate for the insufficient capacity by using a boiler when the heating capacity is insufficient in the cold weather when the outdoor temperature is very low.

The complex air-conditioning system according to the present invention can perform indoor floor heating by using a heat exchanger for hot water supply even if the heating to cooling cycle is switched for defrosting the indoor heat exchanger.

The complex air-conditioning system according to the present invention can perform various operations such as indoor air heating and indoor floor heating in winter, simultaneous cooling and heating in spring and autumn, cooling in summer, and supplying hot water for four seasons. Can be.

Claims

A heat pump system for connecting a compressor, a four-way valve, an indoor heat exchanger, an outdoor heat exchanger, an expansion device, and a plurality of hot water supply heat exchangers to perform heating and cooling with a refrigerant pipe; Including a floor heating system having a heating water supply pipe for circulating the heating water for heating the indoor space and a heating control valve for regulating the flow of the heating water,

The heating water supply pipes are respectively connected to the plurality of hot water supply heat exchangers so as to heat the heating water in the hot water supply heat exchanger, and the hot water supply heat exchanger is connected between the outlet of the compressor and the four-way valve. And a hot water heat exchanger and a second hot water heat exchanger connected between the four-way valve and the expansion device.

The system of claim 1, wherein the heat pump system uses a natural refrigerant.

The complex air conditioning system according to claim 2, wherein the natural refrigerant is carbon dioxide.

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The combined air conditioning system according to claim 1, wherein the heat pump system further comprises a first three-way valve connected between the four-way valve and the second hot water heat exchanger.

The system of claim 6, wherein the first three-way valve guides the flow of the refrigerant to perform a heating operation in the second hot water heat exchanger.

The system of claim 6, wherein the heat pump system further comprises a second three-way valve connected between the indoor heat exchanger and the expansion device.

The complex air conditioning system according to claim 8, wherein the second three-way valve guides the flow of the refrigerant to perform indoor air heating or indoor air cooling in the indoor heat exchanger.

The system of claim 6, wherein the heat pump system further comprises a third three-way valve connected between the outdoor heat exchanger and the expansion device.

The refrigerant flow of claim 10, wherein the third three-way valve is configured to perform indoor air heating by using heat exchanged by the indoor heat exchanger, and / or to perform indoor floor heating by using the heating water. The complex heating and heating system, characterized in that to guide.

The complex of claim 10, wherein the third three-way valve guides the refrigerant passing through the expansion device to the indoor heat exchanger when the indoor air cooling is performed by using the heat exchanged air in the indoor heat exchanger. Air conditioning system.

The combined air conditioning system according to claim 6, wherein the heat pump system further comprises a first open / close valve installed between the four-way valve and the outdoor heat exchanger.

The method of claim 13, wherein when performing indoor air cooling and indoor floor heating or hot water supply, the first opening / closing valve is configured such that the refrigerant flows directly to the second hot water heat exchanger without passing the refrigerant to the outdoor heat exchanger for sufficient hot water supply. Combined heating and cooling system, characterized in that guide.

The system of claim 1, wherein the floor heating system further comprises a boiler for reheating the heating water heated in the hot water supply heat exchanger.

The complex air conditioning system according to claim 15, wherein the boiler is installed in a bypass pipe branched from the heating water supply pipe.

The system of claim 15, wherein the floor heating system further comprises a heat storage tank and a hot water supply pipe.

18. The method of claim 17, wherein the heat storage tank is installed between the hot water supply heat exchanger and the boiler, the heat storage tank is heat exchanged with the heating water heated in the hot water supply heat exchanger or the heating water reheated by the boiler. To make, the hot water supply pipe is a complex heating and heating system, characterized in that for supplying hot water.

18. The system of claim 17, wherein the floor heating system further comprises a pump connected to the outlet of the heat storage tank.

20. The system of claim 19, wherein the pump guides the heating water exchanged in the heat storage tank to an inlet of the boiler or an inlet of the indoor space.

The combined air-conditioning and heating system of claim 17, further comprising a second opening / closing valve installed at an outlet side heating water supply pipe of the indoor space to control the flow of the heating water returned to the heat storage tank.

18. The complex system of claim 17, wherein the floor heating system further comprises a cold water supply pipe for supplying cold water, and wherein the cold water supply pipe is connected to the hot water supply heat exchanger to heat the cold water to produce heating water. Air conditioning system.

23. The system of claim 22, further comprising a third opening / closing valve for guiding the heating water produced by the hot water supply heat exchanger to the heating water supply pipe.