KR101171763B1 - Gas driven heatpump system with the combined heat source - Google Patents

Abstract

PURPOSE: A gas heat pump system with a dual source method is provided to be environmentally operated by cooling and heating using new regeneration energy or natural energy. CONSTITUTION: A gas heat pump system with a dual source method comprises a water-water-refrigerant heat exchanger(11a), a dual source unit(30), a first three way valve(18), a bypass pipe(20), and a fan coil unit. The water-water-refrigerant heat exchanger is installed in a refrigerant circulation line between a four way valve and an air-cooled type heat exchanger. The dual source unit is connected to the water-water-refrigerant heat exchanger through first and second lines(38,39). The first three way valve is installed in the refrigerant circulation line between the water-water-refrigerant heat exchanger and the air-cooled type heat exchanger. The bypass pipe branches from a branch point of the refrigerant circulation line, and is connected to the first three way valve. The fan coil unit is connected to the water-water-refrigerant heat exchanger through third and fourth lines(41,42).

Description

GAS DRIVEN HEATPUMP SYSTEM WITH THE COMBINED HEAT SOURCE}

The present invention relates to a gas type heat pump system of a combined heat source method, and more specifically, to a waste heat, fresh water, geothermal and solar heat as a heat source in a gas type heat pump system in which a heat pump is operated using gases such as LNG and LPG. The present invention relates to a gas heat pump system of a combined heat source method that can increase energy efficiency while reducing gas consumption by enabling heating and cooling operation.

In general, the heat pump is a high-efficiency cooling and heating device that moves the surrounding heat from the low temperature part to the high temperature part by receiving power from the outside, and uses hot water, regeneration heat sources such as air heat, solar heat, geothermal heat, sewage, and waste water at low temperature in the air. It is a way of making heating and cooling heat sources. It is not only environmentally friendly but also energy-saving because it uses natural heat sources without using fossil fuels. Heat pumps are classified into air heat, water heat, geothermal heat, and waste heat heat pumps according to heat sources that take heat. Electric heat pumps can be classified into electric (EHP) and gas (GHP) types.

Conventional gas-type heat pump (GHP) system has the advantage of greatly reducing the dependence of electricity by driving the air conditioner using gas with little use of electricity. However, there is a problem that gas, fuel itself, has a limited amount of energy, and that the energy efficiency (COP) is not very high and is only about 1.2 to 1.4.

1 relates to a conventional gas-type heat pump (GHP). When the compressor 3 is driven by the power of the gas engine 4 using LNG or LPG as a heat source, the compressor compresses the refrigerant by the compressor and the indoor unit 7 ) Is a gas engine driven heat pump used as a cooling device in summer and a heating device in winter by repeating liquefaction and vaporization by flowing through a refrigerant pipe between the outdoor unit and the outdoor unit 1.

In the heating operation, the refrigerant is compressed by a compressor (3, compressor) driven by the gas engine (4), and the refrigerant gas, which has become a high temperature and high pressure according to the compression, is condensed and liquefied in a heat exchanger mounted inside the indoor unit (7). At this time, heating is performed in contact with the indoor air. The liquid refrigerant thus liquefied is depressurized at the expansion valve 2 of the indoor unit, and the liquid refrigerant depressurized to low pressure is absorbed from the outdoor air in the air-cooled heat exchanger 6 on the outdoor unit 1 side and vaporized. The circulation is continued while the evaporated gas refrigerant is sucked back into the compressor 3 to be heated.

During the cooling operation, the refrigerant is compressed by a compressor (3, compressor) driven by the gas engine (4), and the refrigerant gas, which has become a high temperature and high pressure according to the compression, is condensed in the air-cooled heat exchanger (6) on the outdoor unit (1) side to liquefy. do. The liquid refrigerant is depressurized at the expansion side 2 of the indoor unit, and the liquid refrigerant at low pressure is absorbed from the indoor air in the heat exchanger of the indoor unit 7 and is evaporated. The room is cooled by the heat of evaporation. The refrigerant gas enters the compressor (3) and repeats the same action while cooling the room. At this time, the four sides (5) by opening and closing the flow path of the refrigerant pipe suitable for the operation method is a cooling operation in the summer, heating operation is performed in the winter.

Such a gas type heat pump can reduce the electricity consumption, but there is a problem of using a gas having a finite amount of fossil fuel, and also a problem of not having high energy efficiency. Therefore, there is an urgent need for a means to reduce the amount of gas used and to improve efficiency. Therefore, it is possible to effectively use the temperature difference energy using fresh water such as waste water, river water, and lake water, geothermal system using the heat of the earth, or solar heat. This can greatly solve the problems of energy efficiency and gas consumption.

The present invention has been made in accordance with the necessity as described above, an object of the present invention is to use the waste water, fresh water, geothermal and solar heat as a heat source in the gas-type heat pump system can be cooled and operated indoors, while reducing the gas consumption and energy efficiency It is economical because it can reduce the electricity consumption compared to geothermal heat pump or heat source heat pump, and it is a gas heat pump of combined heat source type that realizes eco-friendly system by performing cooling and heating by using renewable energy or natural energy together. It is to provide a system.

Gas heat pump system of the combined heat source method according to the present invention for solving the above problems, the air-cooled heat exchanger 10, compressor 13, four-way valve 12, expansion valve 16 and the indoor unit 15 In the gas-type heat pump system which is connected to each other by the refrigerant circulation line (17) to form a closed circuit, and operated by the gas engine (14) connected to the compressor (13), the four-way valve (12) and air-cooled heat exchanger A water-refrigerant heat exchanger 11 installed in the refrigerant circulation line 17 between the groups 10; A complex heat source unit 30 connected to the water-refrigerant heat exchanger 11 through a first line 38 and a second line 39; A first three-way valve (18) installed in the refrigerant circulation line (17) between the water-cooling heat exchanger (11) and the air-cooled heat exchanger (10); And a bypass pipe 20 branched from the branch point (a) of the refrigerant circulation line and connected to the first three-way valve 18. The complex heat source unit 30 includes a geothermal heat exchanger 31. ), Renewable energy or natural energy, such as the temperature difference energy 32 and the solar storage tank 33 is characterized in that.

Preferably, the refrigerant flowing in the refrigerant circulation line 17 and the water flowing in the first line 38 are heat-exchanged in the water-refrigerant heat exchanger 11, and the water-refrigerant heat exchanger 11 and the first three way. A first temperature sensor T1 is installed between the valves 18, and a second temperature sensor T2 is further installed outdoors, and a refrigerant circulation line between the expansion valve 16 and the air-cooled heat exchanger 10 is provided. 17, a third temperature sensor T3 is installed, and the temperature sensors are connected to an automatic control panel. In addition, second and third three-way valves 36 and 37 or two-way valves are installed at the connection portion of the second line 39 connected to the geothermal heat exchanger, the temperature difference energy and the solar storage tank, and the first three-way valve 18 is In addition, the refrigerant circulation line 17 and the bypass pipe 20 may be replaced by an anisotropic valve 21 respectively installed.

The gas heat pump system of the combined heat source system according to the second embodiment of the present invention includes an air-cooled heat exchanger (10), a compressor (13), a four-way valve (12), an expansion valve (16), and an indoor unit (15). In the gas-type heat pump system which is connected to each other by the refrigerant circulation line 17 and constitutes a closed circuit, and is operated by the gas engine 14 connected to the compressor 13, the four-way valve 12 and the air-cooled heat exchanger ( A water-water-refrigerant heat exchanger (11a) installed in the refrigerant circulation line (17) therebetween; A complex heat source unit 30 connected to the water-water-refrigerant heat exchanger 11a through a first line 38 and a second line 39; A first three-way valve (18) installed in the refrigerant circulation line (17) between the water-water-refrigerant heat exchanger (11a) and the air-cooled heat exchanger (10); And a bypass pipe 20 branched from the branch point (a) of the refrigerant circulation line and connected to the first three-way valve (18), and provided with a water-water-refrigerant heat exchanger (11a). A water heat exchanger such as a fan coil unit and an air conditioner 40 connected to the third line 41 and the fourth line 42 is installed.

Preferably, a storage tank 45 connected to the third line 41 and the fourth line 42 is installed, and a fourth portion is connected to the storage tank 45 and the fourth line 42. A three-way valve 44 is installed, a supply pump 43 is installed on the third line 41 between the storage tank 45 and the water-water-refrigerant heat exchanger 11a, and the refrigerant circulation line 17 is provided. Refrigerant flowing through the water), water flowing through the first line 38 and water flowing through the third line 41 are heat-exchanged in the water-water-refrigerant heat exchanger (11a), the water-water-refrigerant heat exchanger (11a) And a first temperature sensor T1 is installed between the first three-way valve 18, a second temperature sensor T2 is further installed outdoors, and between the expansion valve 16 and the air-cooled heat exchanger 10. A third temperature sensor T3 is installed in the refrigerant circulation line 17, and the temperature sensor is connected to the automatic control panel.

In addition, the gas heat pump system of the combined heat source method according to the third embodiment of the present invention, the air-cooled heat exchanger 10, compressor 13, four-way valve 12, expansion valve 16 and the indoor unit 15 In the gas-type heat pump system which is connected to each other by the refrigerant circulation line (17) to form a closed circuit, and operated by the gas engine (14) connected to the compressor (13), the expansion valve (16) and air-cooled heat exchanger A water-refrigerant heat exchanger 11b installed in the refrigerant circulation line 17 between the groups 10; A complex heat source unit 30 connected to the water-refrigerant heat exchanger 11b through a first line 38 and a second line 39; And a control unit.

Preferably, a third temperature sensor T3 connected to the automatic control panel is installed in the refrigerant circulation line 17 between the expansion valve 16 and the air-cooled heat exchanger 10, and the four-way valve 12 and the air-cooled type are installed. A first temperature sensor T1 is installed between the heat exchangers 10, a second temperature sensor T2 is further installed outdoors, the first and second temperature sensors are connected to an automatic control panel, and a water-refrigerant The heat exchanger 11b is installed outside the outdoor unit side, the automatic control panel is further connected with the fan motor 19, and the water-coolant heat exchanger 11b is installed on the liquid pipe of the refrigerant circulation line 17.

The gas heat pump system of the combined heat source method according to the present invention having the features as described above can achieve the following effects.

First, to increase energy efficiency (COP): can increase energy efficiency (COP) compared to the existing GHP system. In other words, the existing gas-type heat pump depends only on the air-cooled heat exchanger method (in summer, the temperature of the outdoor air can rise up to 35 ° C or more, so the condensation (cooling) of the refrigerant is not performed well, and the outdoor air temperature is minimal in winter). Refrigerant evaporation is not good due to the low ambient temperature because the temperature is lower than 15 ℃) Renewable energy or natural energy (geothermal heat, temperature difference energy, solar heat, etc.) which is low in energy efficiency and is near or above about 15 ℃ all year round. Using them together can revolutionize the system's energy efficiency. However, the automatic control of the air-cooled heat exchanger should be intermittent operation. In other words, when the temperature of the outdoor air is too low or too high in cold or cold weather, it may be necessary to bypass the air-cooled heat exchanger to allow the refrigerant to flow or to turn off the fan motor (according to the automatic control logic).

Second, it is possible to reduce the electricity consumption compared to geothermal heat pump or heat source heat pump. Conventional geothermal heat pumps and heat source heat pumps consume a considerable amount of electricity because they are a type of electric heating and heating system, which can be converted to gas type heat pumps to manage demand (reduced national policy peak power).

Third, it can be used as an eco-friendly system. Cooling and heating by gas is possible without using very little electricity, and eco-friendly cooling and heating system can be realized by using renewable energy or natural energy together.

1 is a configuration diagram of a conventional gas type heat pump system.
2 is a configuration diagram showing a first embodiment of a gas heat pump system of a combined heat source method according to the present invention.
Figure 3 is a block diagram showing a second embodiment of the gas heat pump system of the combined heat source method according to the present invention.
Figure 4 is a block diagram showing a third embodiment of the gas heat pump system of the combined heat source method according to the present invention.

The present invention uses a gas heat pump system that operates a heat pump using gases such as LNG and LPG, and uses a waste heat, fresh water, geothermal heat, and solar heat as heat sources to reduce energy consumption and increase energy efficiency. The heat pump system, Figure 2 is a first embodiment of a gas heat pump system of the combined heat source method according to the present invention, Figure 3 is a second embodiment of the gas heat pump system of the complex heat source method according to the present invention, Figure 4 is a configuration diagram each showing a third embodiment of the gas heat pump system of the combined heat source method according to the present invention.

Referring to Figures 2 to 4 will be described a preferred embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating a specific method of a gas heat pump (GHP) system in which energy efficiency is increased by applying a complex heat source as a first embodiment of the present invention, which uses a conventional gas engine to operate a heat pump. In this method, energy efficiency can be greatly increased by operating a heat pump by mixing geothermal energy, solar heat, and temperature difference energy.

Referring to FIG. 2, the gas heat pump system of the combined heat source method according to the present invention includes an air-cooled heat exchanger 10, a compressor 13, a four-way valve 12, an expansion valve 16, and an indoor unit 15. In the gas-type heat pump system which is connected to each other by the refrigerant circulation line (17) to form a closed circuit, and is operated by the gas engine (14) connected to the compressor (13),

A water-cooling heat exchanger (11) installed in the refrigerant circulation line (17) between the four-way valve (12) and the air-cooled heat exchanger (10); A complex heat source unit 30 connected to the water-refrigerant heat exchanger 11 through a first line 38 and a second line 39; A first three-way valve (18) installed in the refrigerant circulation line (17) between the water-cooling heat exchanger (11) and the air-cooled heat exchanger (10); .

Preferably, a third temperature sensor T3 connected to the automatic control panel is installed in the refrigerant circulation line 17 between the expansion valve 16 and the air-cooled heat exchanger 10, and the third temperature sensor T3 is provided. A bypass pipe 20 branched from the front branch point a and connected to the first three-way valve 18 is installed.

In addition, a first temperature sensor T1 is installed between the water-refrigerant heat exchanger 11 and the first three-way valve 18, and a second temperature sensor T2 is installed outdoors, and the temperature sensors are automatically controlled. Connected with

During cooling, the refrigerant flows through the compressor (13), the water-cooling heat exchanger (11), the air-cooled heat exchanger (10), and the expansion valve (16) to cool the room through the indoor unit (15) (main zone, A-ZONE). In addition, the compressor 13 again undergoes a circulating process, and when heating, the room is heated while undergoing an opposite flow. At this time, the four-way valve 12 changes the refrigerant flow path to provide cooling and heating to the room. . In this way, during the heating and cooling, the refrigerant is compressed by a compressor to circulate the refrigerant circulation line 17, thereby performing an operation of heating and cooling the room.

Meanwhile, the composite heat source unit 30 is composed of a geothermal heat exchanger 31, a solar heat storage tank 33, and a temperature difference energy 32 using river water, a lake, and waste water as renewable energy or natural energy. 30 is connected to the water-refrigerant heat exchanger 11 installed in the refrigerant circulation line 17 through the first line 38 and the second line 39. During the heating and cooling operation, the refrigerant (heat transfer medium) flowing through the refrigerant circulation line 17 and the water flowing through the first line 38 (or a mixture of water and antifreeze) are heat-exchanged in the water-cooling heat exchanger 11 to perform the cooling and heating operation. To do. That is, the water of the complex heat source unit 30 flows through the first line and heat exchanges with the refrigerant flowing through the refrigerant circulation line 17 in the water-refrigerant heat exchanger 11 to release heat to the refrigerant or absorb heat of the refrigerant. Air-conditioning is performed. The solar storage tank 33 of the heat source of the composite heat source unit 30 may be used only for heating operation.

When the gas engine 14 operates during the cooling operation, the high temperature and high pressure refrigerant flows through the compressor 13, the four-way valve 12, the water-refrigerant heat exchanger 11, the air-cooled heat exchanger 10, and the expansion valve 16. The room is cooled by the indoor unit 15, and again flows into the compressor 13 via the four-way valve 12.

The automatic control method described in FIG. 2 describes the automatic control operation conditions of the refrigerant during the cooling and heating operations, and in the A or B direction during the cooling operation and the C or D direction during the heating operation according to the temperature conditions of the refrigerant to be described below. The refrigerant flows through.

In order to control in which direction the refrigerant flows as described above, a temperature sensor for sensing the temperature of the refrigerant is installed. A second temperature sensor T2 and a third temperature sensor T3 are installed in the refrigerant circulation line 17 to sense the temperature of the refrigerant flowing through the refrigerant circulation line 17, and the second temperature sensor T2 outdoors. Is installed to sense the temperature of the outdoor. An automatic control panel for controlling the flow of the refrigerant by comparing the refrigerant temperature sensed by the temperature sensors T1, T2, and T3 and the outdoor temperature is connected to the first to third temperature sensors T1, T2, and T3, respectively. The automatic control panel controls the opening and closing of the first three-way valve 18 according to the temperature condition detected by the temperature sensor.

For example, during the cooling operation, the refrigerant may flow into the refrigerant circulation line 17 through the bypass pipe 20 through the first three-way valve 18 without passing through the air-cooled heat exchanger 10. This is because the heat exchange capacity (energy efficiency) of the composite heat source unit 30 is better than that of the air-cooled heat exchanger 10. Second and third three-way valves 36 and 37 are installed at the connection portion of the second line 39 connected to the geothermal heat exchanger 31, the temperature difference energy 32, and the solar storage tank 33. The second and third three-way valves 36 and 37 installed in the second line 39 may be opened or closed manually or automatically according to whether the unit 30 uses the corresponding heat source (geothermal heat, temperature difference energy, solar heat). Control circulation The second and third three-way valves 36 and 37 may allow the water of the geothermal heat exchanger, the temperature difference energy and the solar storage tank to selectively flow to the refrigerant-water heat exchanger 11.

In addition, during the cooling operation, the refrigerant may flow to the refrigerant circulation line 17 after passing through the air-cooled heat exchanger 10 through the first three-way valve 18.

The automatic control condition of the refrigerant during the cooling operation is T1 ≦ T2 + α (correction constant): the refrigerant flows in the direction A shown in FIG. 2, and the composite heat source unit 30 is passed through the water-coolant heat exchanger 11. The first heat exchanged with the refrigerant flows to the refrigerant circulation line (17) via the bypass pipe (20) through the first three-way valve (18) without passing through the air-cooled heat exchanger (10). That is, when the temperature of the refrigerant sensed by the first temperature sensor T1 is less than or equal to the outdoor temperature detected by the second temperature sensor T2, the refrigerant is not immediately heat-exchanged through the air-cooled heat exchanger 10 again. It flows to the refrigerant circulation line 17 through the bypass pipe 20 and sends it to the indoor unit 15.

T1> T2 + α (correction constant): The coolant flows in the B direction shown in FIG. When the temperature of the refrigerant detected by the first temperature sensor T1 is greater than the outdoor temperature detected by the second temperature sensor T2, water (heat transfer) of the complex heat source unit 30 through the water-coolant heat exchanger 11 is provided. Medium) and the refrigerant heat exchanged firstly through the air-cooled heat exchanger 10, the heat exchanger again to double the heat exchanger to maximize the energy efficiency, it can also increase the cooling efficiency.

In the heating operation, the refrigerant discharged from the compressor 13 passes through the four-way valve 12, the indoor unit 15, the expansion valve 16, the air-cooled heat exchanger 10, the first three-way valve 18, and the water-refrigerant heat exchanger. (11) and the four-way valve 12 goes through a circulation process flowing into the compressor (13). At this time, it is possible to obtain the optimum energy efficiency by determining whether the automatic control condition of the refrigerant described in FIG. 2 is satisfied. That is, the temperature of the refrigerant flowing through the refrigerant circulation line 17 will be sensed by the second temperature sensor T2 and the third temperature sensor T3 to flow the refrigerant in the C or D direction.

The automatic control condition of the refrigerant during the heating operation is T3? T2 +? (Correction constant): The refrigerant flows in the C direction shown in FIG. When the temperature of the refrigerant sensed by the third temperature sensor T3 is greater than or equal to the outdoor temperature sensed by the second temperature sensor T2, the refrigerant passing through the indoor unit 15 and the expansion valve 16 is bypassed. Through the first three-way valve (18) through the water-refrigerant heat exchanger (11) flows into the heat source of the complex heat source unit 30, passes through the compressor (13) and flows into the indoor unit (15).

 T3 <T2 + α (correction constant): When the refrigerant flows in the D direction shown in FIG. 2, the temperature of the refrigerant detected by the third temperature sensor T3 is smaller than the outdoor temperature detected by the second temperature sensor T2. In this case, the refrigerant is first heat exchanged in the air-cooled heat exchanger (10), and then heat exchanges with the heat source of the complex heat source unit (30) in the water-refrigerant heat exchanger (11) via the first three-way valve (18) to thereby double the heat exchange. Energy efficiency can be maximized and heating efficiency can be increased.

As described above, the first three-way valve 18 that changes the flow path of the refrigerant, as shown in FIG. 2, two anisotropic valves 21 installed in the refrigerant circulation line 17 and the bypass pipe 20, respectively. It can be replaced with When the anisotropic valve 21 is installed and used, only the anisotropic valve in the flow path direction in which the refrigerant flows is opened.

3 is a second embodiment according to the present invention, in the gas heat pump system of the combined heat source system by applying a triple (water-water-refrigerant) heat exchanger (11a) in which three lines heat exchange with each other, the heating and cooling And cold water (when heating), hot water (when cooling) is a diagram showing a method that can additionally produce. The gas heat pump system of the combined heat source system according to the second embodiment of the present invention includes an air-cooled heat exchanger (10), a compressor (13), a four-way valve (12), an expansion valve (16), and an indoor unit (15). In the gas-type heat pump system which is connected to each other by the refrigerant circulation line 17 and constitutes a closed circuit, and is operated by the gas engine 14 connected to the compressor 13, the four-way valve 12 and the air-cooled heat exchanger ( A water-water-refrigerant heat exchanger (11a) installed in the refrigerant circulation line (17) therebetween; A complex heat source unit 30 connected to the water-water-refrigerant heat exchanger 11a through a first line 38 and a second line 39; A first three-way valve (18) installed in the refrigerant circulation line (17) between the water-water-refrigerant heat exchanger (11a) and the air-cooled heat exchanger (10); .

Preferably, a third temperature sensor T3 connected to the automatic control panel is installed in the refrigerant circulation line 17 between the expansion valve 16 and the air-cooled heat exchanger 10, and is located in front of the third temperature sensor T3. The bypass pipe 20 branched from the branch point a and connected to the first three-way valve 18 is installed, and the water-water-refrigerant heat exchanger 11a and the third line 41 and the fourth line 42 are provided. Heat exchanger for water, such as a fan coil unit and an air conditioner (40) connected to each other is installed, the water-water-refrigerant heat exchanger (11a) is a triple heat exchanger, the composite heat source unit 30 is a geothermal heat exchanger (31) , The temperature difference energy 32 and the solar storage tank (33).

The refrigerant flows during the heating and cooling operation is the same as the first embodiment. However, in the second embodiment of FIG. 3, instead of the water-refrigerant heat exchanger 11 applied to the first embodiment, a triple (water-water-refrigerant) heat exchanger 11a in which three lines heat exchange with each other is applied. A separate zone (B-ZONE) consisting of a fan coil unit or an air conditioner 40 may be further configured. When cooling indoors (main zone, A-ZONE) in summer, the separate zone (B-ZONE) is heated by the triple heat exchanger (11a). When A-ZONE (indoor) is operated for cooling, B- ZONE is operated by heating.

On the contrary, when heating the indoor room (main zone, A-ZONE), a separate zone (B-ZONE) is cooled by the triple heat exchanger (11a). When A-ZONE (indoor) is operated by heating, Zone is operated by cooling. It is a cooling and heating simultaneous operation system where air conditioning in A-ZONE and B-ZONE is operated simultaneously.

Simultaneous operation of the air-conditioning and heating is performed by the refrigerant flowing through the refrigerant circulation line 17 in which the indoor unit 15 (A-ZONE) is installed, the water flowing through the first line 38, and the water flowing through the third line 41. The water-water-refrigerant heat exchanger 11a exchanges heat, and the indoor unit 15 (A-ZONE) is heat-exchanged in the indoor unit 15 during the cooling operation so that the endothermic refrigerant is the water-water-refrigerant heat exchanger 11a. Dissipates heat at this time, and the water flowing through the first line 38 and the third line 41 is endothermic, and then passes through the water-water-refrigerant heat exchanger 11a to the second line 39 and the fourth line. Since the water flowing into the composite heat source unit 30 and the fan coil or air conditioner 40 through the line 42 is in a high temperature state, the B-ZONE composed of the fan coil or air conditioner 40 is opposite to the A-ZONE. I'm driving.

In addition, a cold / hot water storage tank 45 branched from the third line 41 and the fourth line 42 connecting between the triple heat exchanger 11a and the fan coil or the air conditioner 40 is installed. The pump system may store hot water in the storage tank 45 during the cooling operation and cold water in the storage tank during the heating operation, so that cold and hot water of the storage tank 45 may be used when cold and hot water is required at an industrial site and other places. In addition, a fourth three-way valve 44 is installed at the connection portion between the storage tank 45 and the fourth line 42 so that water flowing through the water-water-refrigerant heat exchanger 11a and passing through the fourth line 42 Change the flow path so that it can flow into the B-ZONE or storage tank (45).

A supply pump 43 is further installed on the third line 41 between the storage tank 45 and the water-water-refrigerant heat exchanger 11a, and the supply pump 43 is connected to the third line 41. The water in the storage tank flows smoothly to the water-water-refrigerant heat exchanger (11a).

In this way, when using the triple heat exchanger (11a) and the line configuration, for example, when you want to cool the place where the heat is high (kitchen, furnace, etc. where a lot of heat is generated) due to the predetermined work while heating the room in winter. It would be very useful to install the system according to the third embodiment of the present invention.

4 is a third embodiment according to the present invention, which includes an air-cooled heat exchanger (10), a compressor (13), a four-way valve (12), an expansion valve (16), and an indoor unit (15). 17) in a gas heat pump system connected to each other by a gas engine 14 connected to the compressor 13 to form a closed circuit, wherein a refrigerant circulation between the expansion valve 16 and the air-cooled heat exchanger 10 is performed. A water-refrigerant heat exchanger 11b installed in the line 17; A complex heat source unit 30 connected to the water-refrigerant heat exchanger 11b through a first line 38 and a second line 39; .

The third temperature sensor T3 connected to the automatic control panel is installed in the refrigerant circulation line 17 between the expansion valve 16 and the air-cooled heat exchanger 10, and the four-way valve 12 and the air-cooled heat exchanger 10 are installed. The first temperature sensor T1 is installed between the first and second temperature sensors T2, and the first and second temperature sensors are connected to the automatic control panel. In addition, in the third embodiment, unlike the first and second embodiments, the water-refrigerant heat exchanger 11b is installed outside the outdoor unit side. The automatic control panel is further connected with the fan motor 19. The automatic control panel controls the on / off operation of the fan motor 19 in accordance with the temperature of the refrigerant and the temperature of the outdoor air detected by the respective temperature sensors (T1, T2, T3).

In the third embodiment as described above, the water-refrigerant heat exchanger is installed outside the outdoor unit side without installing a bypass pipe or a three-way valve on the refrigerant circulation line 17 on the outdoor unit side in the manner applied to the first and second embodiments. 11b) (or triple heat exchanger) by installing the heating and cooling effect as in the first and second embodiments. At this time, the water-refrigerant heat exchanger 11b is installed on the liquid pipe of the refrigerant circulation line 17, and both ends of the liquid pipe are connected between the indoor unit 15 and the outdoor unit by installing a connection valve 22. Installing the water-refrigerant heat exchanger 11b on the liquid pipe can be effective for heat exchange and increase thermal efficiency because the specific heat is large when the refrigerant is in the liquid state.

At this time, it is also possible to connect the both ends of the liquid pipe (section of the refrigerant in the liquid state) by welding instead of the connection valve, it is advantageous to use the connection valve 22 for maintenance of the water-cooling heat exchanger (11b).

Also in the third embodiment, the flow of the refrigerant flowing through the refrigerant circulation line 17 and the basic cooling and heating operation method are the same as those of the first and second embodiments, but the automatic control of the refrigerant flow without the bypass pipe or the three-way valve is installed. The control method is different. That is, during the cooling and heating operation, the refrigerant passes through the air-cooled heat exchanger 10 as well as the water-refrigerant heat exchanger 11b at all times, while the fan motor 19 is turned on / off according to the following automatic control operation conditions. Adjust the heat exchange rate.

The automatic control condition of the refrigerant during the cooling operation is T1 ≦ T2 + α (correction constant): when the refrigerant flows from the compressor 13 to the air-cooled heat exchanger 10, the refrigerant sensed by the first temperature sensor T1. When the temperature is less than or equal to the outdoor temperature detected by the second temperature sensor T2, the automatic control panel causes the fan motor 19 to be turned off. In this case, the refrigerant passes through the air-cooled heat exchanger 10, but the fan motor 19 is turned off, so that the heat exchange amount of the refrigerant in the air-cooled heat exchanger is almost zero.

T1> T2 + α (correction constant): Since the temperature of the refrigerant sensed by the first temperature sensor T1 is greater than the outdoor temperature sensed by the second temperature sensor T2, the automatic control panel turns on the fan motor 19. In this state, heat exchange occurs actively while the refrigerant passes through the air-cooled heat exchanger 10.

The automatic control condition of the refrigerant during the heating operation is T3≥T2 + α (correction constant): The air-cooled heat exchanger after the refrigerant heat-exchanged in the indoor unit is heat-exchanged with the water of the complex heat source unit 30 in the water-coolant heat exchanger 11b. When the temperature of the coolant detected by the third temperature sensor T3 is greater than or equal to the outdoor temperature detected by the second temperature sensor T2 when flowing to the air conditioner 10, the automatic control panel of the fan motor 19 Turn it off. At this time, the refrigerant passes through the air-cooled heat exchanger 10, but the fan motor is turned off so that the heat exchange amount in the air-cooled heat exchanger is almost zero.

T3 <T2 + α (correction constant): When the temperature of the refrigerant detected by the third temperature sensor T3 is less than the outdoor temperature detected by the second temperature sensor T2, the automatic control panel turns on the fan motor 19. In the state, heat exchange occurs while the refrigerant passes through the air-cooled heat exchanger (10).

As described above, by comparing the refrigerant temperature sensed by the refrigerant circulation line 17 and the outdoor temperature sensors T1, T2, and T3 and the outdoor temperature, the on / off of the fan motor while the refrigerant passes through the air-cooled heat exchanger 10. By adjusting the OFF to determine the presence or absence of heat exchange in the air-cooled heat exchanger, it is a system that can implement the cooling and heating more efficiently without unnecessary operation of the air-cooled heat exchanger.

In summary, the temperature sensor for controlling the refrigerant flow applied to the present invention is summarized as a sensor for detecting the refrigerant temperature, each of which comprises one first and third temperature sensors T1 and T3, which are installed in the refrigerant circulation line 17. do. In addition, one second temperature sensor T2 for sensing a temperature of outdoor air is installed outside the outdoor unit. The temperature sensors are connected to the automatic control panel and transmit the detected value (measured value) to the automatic control panel (INPUT), and the automatic control panel compares the values detected by the temperature sensors to output the output signal (OUTPUT) to the first three-way valve. To 18 and fan motor 19. Opening and closing of the three-way valve and on / off of the fan motor are adjusted by the output signal.

Reference numeral 34 denotes a geothermal circulation pump, 35 denotes a circulation pump, respectively, which is installed in the water circulation line of the first line 38 and the solar storage tank, so that the water (heat transfer medium) of the geothermal heat exchanger, the temperature difference energy, and the solar thermal storage tank is desired. It is a device for pumping refrigerant- and water-water-refrigerant heat exchangers (11, 11b, 11a) and solar storage tank (33). In general, the circulation pump is a device installed on a line (pipe) to smoothly pump the heat transfer medium in the heat pump system, and thus the detailed description thereof will be omitted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10.Air-cooled heat exchanger 11,11b water-refrigerant heat exchanger
11a.Water-Water-Refrigerant Heat Exchanger (Triple Heat Exchanger)
12. Four-way valve 13. Compressor
14.Gas engine 15.Indoor
16.Expansion valve 17.Refrigerant circulation line
18.First Three-way Valve 19.Fan Motor
20.Bypass pipe 21.Anisotropic valve
30. Complex heat source unit 31. Geothermal heat exchanger
32.Temperature difference energy such as river water and waste water
33.Solar storage tank 34.Circulation pump
35.Geothermal circulation pump 36.Second three-way valve
37.Third-way valve
38.First Line 39.Second Line
40. Fan coil or air conditioner 41. Third line
42.4th Line 43.Supply Pump
44. Four-way valve 45. Cold and hot water storage tank
T1.1st temperature sensor T2.2nd temperature sensor
T3.3rd Temperature Sensor a. bifurcation

Claims (13)

delete delete delete delete delete In the gas-type heat pump system having an air-cooled heat exchanger, a compressor, a four-way valve, an expansion valve, and an indoor unit, connected to each other by a refrigerant circulation line to form a closed circuit, and operated by a gas engine connected to the compressor,
A water-water-cooled heat exchanger installed in a refrigerant circulation line between the four-way valve and the air-cooled heat exchanger;
A composite heat source unit connected to the water-water-refrigerant heat exchanger through a first line and a second line;
A first three-way valve installed in a refrigerant circulation line between the water-water-refrigerant heat exchanger and the air-cooled heat exchanger;
It is configured to include,
A bypass pipe branched at the branch point (a) of the refrigerant circulation line and connected to the first three-way valve,
A gas heat pump system of a combined heat source method, characterized in that a water heat exchanger such as a fan coil unit and an air conditioner connected to a third line and a fourth line is installed.
The method according to claim 6,
Storage tanks connected to the third line and the fourth line is installed,
A fourth three-way valve is installed at the connection portion between the storage tank and the fourth line.
And a feed pump is installed on the third line between the storage tank and the water-water-refrigerant heat exchanger.
The method according to claim 6,
And a refrigerant flowing through the refrigerant circulation line, water flowing through a first line, and water flowing through a third line are heat-exchanged in a water-water-refrigerant heat exchanger.
The method according to claim 6,
A first temperature sensor T1 is installed between the water-water-refrigerant heat exchanger and the first three-way valve, and a second temperature sensor T2 is further installed outdoors, and the refrigerant circulates between the expansion valve and the air-cooled heat exchanger. The third heat sensor (T3) is installed in the line, the temperature sensor is a gas heat pump system of a combined heat source method, characterized in that connected to the automatic control panel.
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