KR20190046080A - Gas heat-pump system - Google Patents

Abstract

According to the present invention, a gas heat pump system can comprise: a supply tube in which cooling water for cooling an engine flows; a cooling water pump disposed in the supply tube; a first branch tube which is branched from the supply tube, and in which cooling water to be supplied to the engine flows; a second branch tube branched from the supply tube, wherein cooling water to be supplied to an intercooler for cooling a mixer in which air and fuel are compressed by being mixed with each other flows; and a flow control valve for controlling flow of cooling water in the first branch tube and the second branch tube.

Description

[0001] Gas heat pump system [0002]

The present invention relates to a gas heat pump system.

The heat pump system is a system equipped with a refrigeration cycle capable of performing cooling or heating operation, and can be interlocked with a hot water supply device or a cooling / heating device. That is, hot water can be produced using a heat source obtained by heat exchange between a refrigerant in a refrigeration cycle and a predetermined heat storage medium, or air conditioning for cooling and heating can be performed.

The refrigeration cycle may include a compressor for compressing the refrigerant, a condenser for condensing the refrigerant compressed in the compressor, an expansion device for decompressing the refrigerant condensed in the condenser, and an evaporator for evaporating the decompressed refrigerant.

The heat pump system may include a gas heat pump system. Large-capacity compressors are required for air conditioning in industrial buildings and large buildings, not for home use. That is, a gas heat pump system can be used as a system using a gas engine instead of an electric motor to drive a compressor for compressing a large amount of refrigerant into a high-temperature and high-pressure gas.

The gas heat pump system may include an engine that generates power using a mixture of fuel and air (hereinafter referred to as a mixer). In one example, the engine may include a cylinder to which the mixer is fed and a piston that is provided movably within the cylinder.

The gas heat pump system may further include an air supply device for supplying a mixer to the engine, and a mixer for mixing the fuel supply device and the air and the fuel.

The air supply device may include an air filter for purifying the air. And, the fuel supply apparatus may include a zero governor for supplying fuel of a constant pressure.

The zero governor can be understood as an apparatus for regulating and supplying the outlet pressure uniformly, without regard to the change in the magnitude of the inlet pressure or the flow rate of the fuel). In one example, the zero governor may include a nozzle unit for reducing the pressure of the fuel, a diaphragm to which the reduced pressure is applied in the nozzle unit, and a valve unit to be opened and closed by the operation of the diaphragm .

The air passing through the air filter and the fuel discharged from the zero governor may be mixed in the mixer (mixer) and supplied to the engine.

When the mixer supplied to the engine is burned, the exhaust gas can be discharged from the engine.

Prior Art Documents: Korean Unexamined Patent Application Publication No. 10-2013-0021377,

Prior art discloses a cooling apparatus for an engine exhaust gas recirculation circuit.

In the case of the prior art, a high temperature loop for cooling the engine and a low temperature loop in which the fluid flows for heat exchange between air passing through the air supply circuit of the engine and the intercooler can be included.

The high temperature loop is configured independently of the low temperature loop, and each of the high temperature loop and the low temperature loop includes a pump.

According to this prior art document, there are disadvantages in that a pump for fluid flow must exist in each flow channel, since two flow paths for flowing the cooling fluid are independently constituted, and fluid flow in each flow path must be respectively controlled There are disadvantages.

In addition, when each flow path is separately formed, there is a separate radiator in each flow path, and there must be a fan for blowing air to each radiator, which is structurally complicated and has a disadvantage that the volume of the cooling device becomes large.

An object of the present invention is to provide a gas heat pump system capable of cooling an intercooler using cooling water for cooling an engine.

Another object of the present invention is to provide a gas heat pump system in which cooling performance of an intercooler is improved.

Another object of the present invention is to provide a gas heat pump system in which the cooling performance of the engine is improved.

In order to solve the above problems, the present invention provides a gas heat pump system comprising: a supply pipe through which cooling water for cooling an engine flows; a cooling water pump provided in the supply pipe; A second branch pipe through which cooling water to be supplied to the intercooler for cooling the mixer, which is branched from the supply pipe and mixed with air and fuel, flows, flows; And a flow regulating valve for regulating the flow of cooling water in the first branch pipe and the second branch pipe. Thus, the cooling water flow path can be simplified, thereby simplifying the structure of the system and reducing the volume.

In addition, the gas heat pump system of the present invention may further include a cooling water heat exchanger for cooling the cooling water by exchanging the cooling water for flowing into the intercooler with the coolant, thereby improving the cooling performance of the intercooler.

Further, in the gas heat pump system of the present invention, the second branch pipe that has passed through the intercooler can be connected to the first branch pipe, so that the cooling water to be supplied to the exhaust gas heat exchanger is combined with the cooling water passing through the intercooler having a relatively low temperature The heat exchange performance of the exhaust gas heat exchanger and the cooling performance of the engine can be improved.

According to the proposed invention, the intercooler can be cooled by using the cooling water for cooling the engine, and there is no need for the cooling water flow path separated from the cooling water flow path for cooling the engine. Therefore, not only the cooling water can be flowed to the intercooler side by using one cooling water pump but also the cooling water can be flowed to the engine side.

In addition, the additional cooling water pump, the radiator, and the fan for heat dissipation are unnecessary, so that the structure of the entire system is simplified and the volume is reduced.

Further, since the cooling water for flowing to the intercooler is heat-exchanged with the low-temperature refrigerant, the cooling performance of the mixer in the intercooler is improved.

In addition, since the cooling water to be supplied to the exhaust gas heat exchanger is supplied to the exhaust gas heat exchanger in a state of being combined with the cooling water passing through the intercooler having a relatively low temperature, the heat exchanging performance of the exhaust gas heat exchanger and the cooling performance of the engine are improved .

1 is a cycle diagram showing a configuration of a gas heat pump system according to an embodiment of the present invention;
2 is a view showing an engine module according to an embodiment of the present invention;
3 is a cycle diagram showing the flow of refrigerant, cooling water, and mixed fuel in a heating operation of a gas heat pump system according to an embodiment of the present invention.
4 is a cycle diagram showing the flow of refrigerant, cooling water, and mixed fuel in a cooling operation of a gas heat pump system according to an embodiment of the present invention.
5 is a view showing cooling water flow in an engine module according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be " connected, " " coupled, " or " connected. &Quot;

FIG. 1 is a cycle diagram showing a configuration of a gas heat pump system according to an embodiment of the present invention, and FIG. 2 is a view showing an engine module according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, a gas heat pump system 10 according to an embodiment of the present invention may include a plurality of components constituting a refrigerant cycle as an air conditioning module.

For example, the air conditioning module includes a compressor 110 for compressing a refrigerant, an oil separator 115 for separating oil from refrigerant compressed in the compressor 110, And may include four sides 117 for switching directions.

The gas heat pump system 10 may further include an outdoor heat exchanger 120 and an indoor heat exchanger 140.

The outdoor heat exchanger 120 may be disposed inside an outdoor unit disposed on the outdoor side, and the indoor heat exchanger 140 may be disposed inside an indoor unit disposed on the indoor side. The refrigerant passing through the four sides 117 can flow to the outdoor heat exchanger 120 or the indoor heat exchanger 140.

The configurations of the system shown in Fig. 1 can be disposed on the outdoor side, i.e., inside the outdoor unit, except for the indoor heat exchanger 140 and the indoor expansion unit 145. [

When the gas heat pump system 10 is operated in the cooling operation mode, the refrigerant passing through the four sides 117 can flow to the indoor heat exchanger 140 side via the outdoor heat exchanger 120. On the other hand, when the gas heat pump system 10 is operated in the heating operation mode, the refrigerant passing through the four sides 117 flows into the outdoor heat exchanger 120 through the indoor heat exchanger 140 .

The gas heat pump system 10 further includes a refrigerant pipe 170 (solid line flow path) for guiding the flow of the refrigerant by connecting the compressor 110, the outdoor heat exchanger 120, the indoor heat exchanger 140, can do.

The configuration of the gas heat pump system 10 will be described with reference to a cooling operation mode.

The refrigerant that has flowed to the outdoor heat exchanger 120 can be condensed by heat exchange with the outside air. An outdoor fan (122) for blowing outdoor air may be disposed at one side of the outdoor heat exchanger (120).

A main expansion device 125 for reducing the pressure of the refrigerant may be provided at the outlet side of the outdoor heat exchanger 120. For example, the main expansion device 125 may include an electronic expansion valve (EEV). During the cooling operation, the main expansion device 125 is fully opened and does not perform the depressurizing action of the refrigerant.

On the outlet side of the main expansion device 125, a supercooling heat exchanger 130 for further cooling the refrigerant may be provided. The supercooling heat exchanger 130 may be connected to the supercooling flow path 132. The supercooling flow path 132 may be branched from the refrigerant pipe 170 and connected to the supercooling heat exchanger 130.

The supercooling flow path 132 may be provided with a supercooling expansion device 135. The refrigerant flowing through the supercooling passage 132 may be decompressed while passing through the supercooling expansion device 135.

In the supercooling heat exchanger 130, heat exchange may be performed between the refrigerant of the refrigerant pipe 170 and the refrigerant of the supercooling flow path 132. In the heat exchange process, the refrigerant in the refrigerant pipe 170 is subcooled, and the refrigerant in the supercooling passage 132 absorbs heat.

The supercooling flow path 132 may be connected to the gas-liquid separator 160. The refrigerant in the supercooling flow path 132, which is heat-exchanged in the supercooling heat exchanger 130, may be introduced into the gas-liquid separator 160.

The refrigerant in the refrigerant pipe 170 that has passed through the supercooling heat exchanger 130 flows to the indoor unit side and is decompressed in the indoor expansion unit 145 and evaporated in the indoor heat exchanger 140. The indoor expansion device 145 may be installed inside the indoor unit and may include an electronic expansion valve (EEV).

The refrigerant vaporized in the indoor heat exchanger (140) can flow to the auxiliary heat exchanger (150) via the four sides (117).

The auxiliary heat exchanger (150) is a heat exchanger capable of performing heat exchange between the evaporated low-pressure refrigerant and the high-temperature cooling water, for example, a plate heat exchanger may be included.

Since the refrigerant evaporated in the indoor heat exchanger (140) can be absorbed while passing through the auxiliary heat exchanger (150), the evaporation efficiency can be improved. The refrigerant passing through the auxiliary heat exchanger (150) may be introduced into the gas-liquid separator (160).

The refrigerant having passed through the auxiliary heat exchanger 150 is separated from the gas-liquid separator 160 by the gas-liquid separator 160, and the separated gaseous refrigerant can be sucked into the compressor 110.

The refrigerant vaporized in the indoor heat exchanger 140 may flow into the gas-liquid separator 160 immediately after passing through the four sides 117. The separated gaseous refrigerant may be sucked into the compressor 110 .

The gas heat pump system 10 may further include a cooling water tank 305 for storing cooling water for cooling the engine 200 and a cooling water pipe 360 for flowing the cooling water .

The cooling water pipe 360 is provided with a cooling water pump 300 for generating the flow of cooling water, a plurality of flow switching parts 310 and 320 for switching the flow direction of the cooling water, and a radiator 330, radiator) may be installed.

The plurality of flow switching units 310 and 320 may include a first flow switching unit 310 and a second flow switching unit 320. For example, the first flow switching unit 310 and the second flow switching unit 320 may include a three-way valve.

The radiator 330 may be located at one side of the outdoor heat exchanger 120. The cooling water of the radiator 330 is heat-exchanged with the outside air by driving the outdoor fan 122, have.

When the cooling water pump 300 is driven, the cooling water stored in the cooling water tank 305 passes through the engine 200 and the exhaust gas heat exchanger 240, which will be described later, The refrigerant can be selectively flowed to the radiator 330 or the auxiliary heat exchanger 150 through the flow switching unit 320.

The gas heat pump system 10 may further include an engine module including an engine 200 that generates power for driving the compressor 110.

The engine module may include various components for supplying mixed fuel to the engine 200 and the engine 200.

The gas heat pump system 10 may further include a mixer 220 disposed at an inlet side of the engine 200 to supply mixed fuel.

The gas heat pump system 10 includes an air filter 210 for supplying purified air to the mixer 220 and a zero governor 230 for supplying fuel below a predetermined pressure ).

The zero governor 230 can be understood as a device for regulating and supplying the outlet pressure uniformly regardless of the change in the magnitude or the flow rate of the inlet pressure of the fuel.

The air passing through the air filter 210 and the fuel discharged from the zero governor 230 are mixed in the mixer 220 to form a mixer. The mixer may be supplied to the engine 200.

The gas heat pump system 10 includes an exhaust gas heat exchanger 240 and an exhaust gas heat exchanger 240, which are provided at an outlet side of the engine 200 and through which exhaust gas generated after the mixture is combusted, And a muffler 250 for reducing the noise of the exhaust gas.

In the exhaust gas heat exchanger 240, heat exchange can be performed between the cooling water and the exhaust gas.

An oil tank 205 for supplying oil to the engine 200 may be provided at one side of the engine 200.

Meanwhile, as described above, the engine 200 applied to the gas heat pump system 10 uses household LNG, LPG, or the like as fuel.

However, there is a problem that the output of the engine 200 is reduced due to the low supply pressure (1 to 2.5 kPa) when supplying the residential LNG or LPG as fuel while supplying air to the engine 200 by the natural intake system .

In summer, the gas heat pump system 10 operates in a cooling mode to lower the temperature of the room. When the outdoor temperature is high, high temperature air is supplied to the engine 200 due to the high temperature.

Accordingly, low-density air is supplied to the engine 200, and the output of the engine 200 is reduced. As a result, the output of the engine 200 can not follow the high cooling load, which may cause a cooling failure.

In order to solve this problem, when the air is supplied by adjusting the amount of fuel according to the amount of air after pressurizing the air with a supercharger as in an automobile engine, the supply pressure (about 2.5 kPa) in the gas fuel pipe is lower than the boost pressure There is a problem that fuel supply becomes difficult.

The gas heat pump system 10 further includes a supercharging means 400 and an adjusting means 600 disposed between the mixer 220 and the engine 200 can do.

After the air and the fuel are mixed in the mixer 220, the supercharger 400 compresses the discharged mixer and discharges it to the engine 200 side. At this time, the supercharger 400 can compress the air and the fuel to atmospheric pressure or higher in the mixer 220.

For example, the supercharging means 400 may be a turbocharger driven by the exhaust gas of the engine 200.

The turbocharger rotates the turbine 411 using the exhaust gas discharged from the engine 200, presses (compresses) the introduced gas by the rotational force, and discharges the gas.

The turbine 411 is connected to the exhaust manifold of the engine 200 through the exhaust pipe 191 of the engine 200 when the supercharging means 400 is provided as a turbocharger, When the mixed gas is introduced into the mixer 220, the mixed gas is pressurized (compressed) and then discharged to the intercooler 500 side.

Also, the rotating shaft of the turbo charger may be supplied with oil from the engine 200 side for the purpose of lubrication or the like.

As another example, the supercharging means 400 may be provided as a supercharger driven by the power of the engine 200 or an electric motor.

The regulating means 600 is disposed between the supercharging means 400 and the engine 200 to regulate the amount of the compressed mixture supplied to the engine 200.

For example, the control means 600 may be a valve using an electronic throttle control (ETC) method.

According to the present invention, fuel and air are mixed in the mixer 220, and can be supplied to the engine 200 after being pressurized by the supercharging means 400 at a high pressure.

Also, the amount of the high-pressure mixer (air + fuel) supplied to the engine 200 through the regulating unit 600 may be precisely controlled.

Therefore, the efficiency of the engine 200 can be improved. In addition, the maximum output of the engine 200 can be increased without increasing the size of the engine 200. That is, the output of a large engine can be realized with a small engine.

On the other hand, when the mixer passes through the supercharger 400 as described above, the pressure and the temperature of the mixer increase. In this case, the density of the mixer sucked into the engine 200 is reduced, and the volume efficiency of the engine is inevitably lowered.

The gas heat pump system 10 may further include an intercooler 500 disposed between the supercharging means 400 and the regulating means 600 to solve the above problem.

The intercooler (500) cools the high-temperature high-pressure mixer discharged from the supercharging means (400), reduces the volume, increases the density, and discharges it.

For example, the intercooler 500 may exchange heat between a mixer to be supplied to the engine 200 and a portion of cooling water to flow to the engine 200.

Therefore, according to the intercooler 500, the temperature of the mixer supplied to the engine 200 can be lowered and the density can be increased, thereby improving the volume efficiency of the engine 200.

If the supercharging unit 400 and the intercooler 500 are provided between the mixer 220 and the engine 200 as described above, the length of the flow path in which the mixer stays is inevitably prolonged. At this time, if there is a large amount of water in the air, the mixer reacts with water to generate formic acid, thereby damaging the piping, thereby causing explosion.

The engine 200 is driven from the closed state of the control means 600 to the stop of the engine 200 to stop the operation of the mixer 600. In this case, It is possible to suppress the formation of formic acid by burning or externally discharging, and it is possible to prevent the danger such as breakage and explosion of piping.

The cooling water pipe 360 may include a supply pipe 361 extending from the cooling water tank 305 toward the engine 200.

The supply pipe 361 may be provided with a cooling water pump 300 for flowing cooling water.

The first branch pipe 371 and the second branch pipe 372 may be branched from the supply pipe 361. [

The cooling water flow in the first branch pipe 371 and the second branch pipe 372 can be adjusted by the flow control valve 322. For example, the flow control valve 322 may be a three way valve.

The flow control valve 322 may be connected to the supply pipe 361 and the first branch pipe 371 and the second branch pipe 372 may be connected to the flow control valve 322 have.

As another example, it is also possible that the flow control valve 332 is installed in each of the first branch pipe 371 and the second branch pipe 372.

The flow rate of the cooling water flowing into the first branch pipe 371 and the second branch pipe 372 by the flow control valve 322 can be adjusted. For example, cooling water may flow into the first branch pipe 371 and the second branch pipe 372, respectively, or may flow into either the first branch pipe 371 or the second branch pipe 372 have.

The first branch pipe 371 may extend to the engine 200 through the exhaust gas heat exchanger 240.

That is, the cooling water flowing through the first branch pipe 371 is heat-exchanged with the exhaust gas discharged from the engine 200 in the exhaust gas heat exchanger 240 and flows into the engine 200 while flowing through the engine 200. [ To recover the waste heat.

The second branch pipe 372 may pass through the intercooler 500. The second branch pipe 372 passing through the intercooler 500 may be connected to the first branch pipe 371, for example.

At this time, the second branch pipe 372 may be connected to the inlet pipe of the exhaust gas heat exchanger 240 in the first branch pipe 372.

Therefore, the cooling water branched from the supply pipe 361 to the second branch pipe 372 flows into the inlet pipe of the exhaust gas heat exchanger 240 after exchanging heat with the mixer while flowing through the intercooler 500 .

At this time, in order to reduce the temperature of the cooling water branched from the supply pipe 361 to the second branch pipe 372, the cooling water flowing through the second branch pipe 372 flows into the second branch pipe 372 through heat exchange with the refrigerant of the refrigerant pipe 170 .

As an example, the gas heat pump system 10 may further include a cooling water heat exchanger 152. The cooling water heat exchanger 152 may be, for example, a plate heat exchanger.

The inlet pipe of the intercooler 500 may pass through the cooling water heat exchanger 152 in the second branch pipe 372.

The cooling water flowing through the cooling water heat exchanger 152 may be heat-exchanged with the refrigerant to be sucked into the compressor 110, for example.

For example, the inlet-side pipe (or the outlet-side pipe 171 of the gas-liquid separator 160) of the compressor 110 may pass through the cooling-water heat exchanger 152.

The refrigerant discharged from the gas-liquid separator 160 may be sucked into the compressor 110 after being exchanged with the cooling water while flowing through the cooling water heat exchanger 152.

On the other hand, the cooling water branched from the supply pipe 361 to the second branch pipe 372 can flow to the intercooler 500 after exchanging heat with the refrigerant while flowing through the cooling water heat exchanger 152.

Since the temperature of the refrigerant discharged from the gas-liquid separator 160 is significantly lower than the temperature of the cooling water flowing into the cooling water heat exchanger 152, the temperature of the cooling medium discharged from the gas- have.

Therefore, according to the present embodiment, the cooling water, which is branched from the supply pipe 361 to the second branch pipe 372, flows to the intercooler 500 while the temperature is lowered while flowing through the cooling water heat exchanger 152 There is an advantage that the cooling performance of the mixer in the intercooler 500 can be shaped.

In addition, since the refrigerant absorbs the refrigerant while passing through the cooling water heat exchanger 152, the temperature supplied to the compressor in the cooling mode is increased, so that the refrigerant system can be stabilized.

The temperature T1 of the cooling water is lower than the temperature T2 of the cooling water of the supply pipe 361 even if the temperature of the cooling water increases while passing through the intercooler 500. [

This is because the temperature of the cooling water supplied to the intercooler 500 is lowered by the cooling water heat exchanger 152 described above.

The cooling water discharged from the intercooler 500 is combined with the cooling water branched to the first branch pipe 371.

Since the temperature T1 of the cooling water discharged from the intercooler 500 is lower than the temperature T2 of the cooling water of the supply pipe 361, the temperature T3 of the cooling water supplied to the exhaust gas heat exchanger 240 The temperature of the cooling water branched from the first branched pipe 371 and the cooling water discharged from the intercooler 500 is lower than the temperature T2 of the cooling water in the supply pipe 361. [

Therefore, according to the present embodiment, since cooling water having a lower temperature passes through the exhaust gas heat exchanger 240 and the engine 200, cooling efficiency of the engine 200 is improved.

The cooling water pipe 360 is connected to the bypass pipe 371 bypassed from the outlet pipe of the exhaust gas heat exchanger 240 in the first branch pipe 371, (373).

The bypass pipe 373 may be supplied to the outlet pipe of the exhaust gas heat exchanger 240 after heat exchange with the supercharging means 400.

That is, one end of the bypass pipe 373 is connected to the outlet pipe of the exhaust gas heat exchanger 240, and the other end is connected to the outlet pipe of the exhaust gas heat exchanger 240 at a position spaced apart from the one end Can be connected.

Therefore, a portion of the cooling water passing through the exhaust gas heat exchanger 240 flows directly to the engine 200, and the other portion of the cooling water flows to the engine 200 after heat exchange with the supercharging means 400.

The cooling water pipe 360 may further include a recovery pipe 362 for guiding cooling water that has passed through the engine 200 to the first flow switching unit 310.

The cooling water pipe 360 may further include a first guide pipe 363 for guiding cooling water from the first flow switching unit 310 to the second flow switching unit 320.

The cooling water pipe 360 may further include a second guide pipe 364 for guiding cooling water from the second flow switching unit 320 to the auxiliary heat exchanger 150.

The cooling water pipe 360 may further include a third guide pipe 365 for guiding cooling water from the second flow switching unit 320 to the radiator 150.

The cooling water pipe 360 may further include a fourth guide pipe 366 for guiding cooling water from the first flow switching unit 310 to the supply pipe 361.

For example, when the temperature of the cooling water passing through the engine 200 is lower than the set temperature, the cooling water flows to the auxiliary heat exchanger 150 or the radiator 330 to reduce the effect of heat exchange, The cooling water flowing into the flow switching unit 310 can be bypassed to the supply pipe 361 through the fourth guide pipe 366. [

The gas heat pump system 10 may further include a cooling water temperature sensor 290 installed at an outlet side of the engine 200 for sensing a temperature of cooling water passing through the engine 200.

Hereinafter, the operation of the refrigerant, the cooling water and the mixed fuel according to the operation mode of the gas heat pump system 10 according to the embodiment of the present invention will be described.

FIG. 3 is a cycle diagram showing the flow of refrigerant, cooling water, and mixed fuel in the heating operation of the gas heat pump system according to the embodiment of the present invention. FIG. 5 is a view showing a flow of cooling water in an engine module according to an embodiment of the present invention. FIG.

3 and 5, when the gas heat pump system 10 performs the heating operation, the refrigerant passes through the compressor 110, the oil separator 115, the four sides 117, the indoor heat exchanger (140) and the supercooling heat exchanger (130). Then, the refrigerant is decompressed in the main expansion device 125, heat-exchanged in the outdoor heat exchanger 120, and then flows into the four sides 117 again. Here, the indoor heat exchanger 140 may function as a " condenser " and the outdoor heat exchanger 120 may function as an " evaporator. &Quot;

The refrigerant that has passed through the four sides 117 flows into the auxiliary heat exchanger 150 and can be heat-exchanged with the cooling water flowing through the second guide pipe 364.

The coolant flowing into the auxiliary heat exchanger 150 forms a low temperature and a low pressure as evaporative coolant and the coolant supplied to the auxiliary heat exchanger 150 forms a high temperature by the heat of the engine 200. Therefore, the refrigerant of the auxiliary heat exchanger (150) absorbs heat from the cooling water, and the evaporation performance can be improved.

The refrigerant heat-exchanged in the auxiliary heat exchanger (150) flows into the gas-liquid separator (160), is phase-separated and then sucked into the compressor (110). The refrigerant can be repeatedly cycled through the above cycle.

When the cooling water pump 300 is driven, the cooling water discharged from the cooling water pump 300 flows along the supply pipe 361 and then flows into the first branch pipe 371 ) And the second branch pipe 372, respectively.

The refrigerant branched to the first branch pipe 371 flows into the exhaust gas heat exchanger 240 and is heat-exchanged with the exhaust gas. The cooling water discharged from the exhaust gas heat exchanger 240 flows into the engine 200 to cool the engine 200 and flows into the first flow switching unit 310 via the return pipe 362 ≪ / RTI >

Under the control of the first flow switching unit 310, the cooling water flowing through the first flow switching unit 310 flows toward the second flow switching unit 320 along the first guide pipe 363 . The cooling water passing through the second flow switching unit 320 flows into the auxiliary heat exchanger 150 via the second guide pipe 364 and can be heat-exchanged with the refrigerant. The cooling water passing through the auxiliary heat exchanger (150) may be introduced into the cooling water pump (300). The cooling water can be circulated by repeating this cycle.

On the other hand, the cooling water branched to the second branch pipe 372 passes through the cooling water heat exchanger 152 and is heat-exchanged with the refrigerant. The cooling water passing through the cooling water heat exchanger 152 passes through the intercooler 500 and is heat-exchanged with the mixer. Finally, the cooling water flows to the first branch pipe 371.

On the other hand, the flow of cooling water to the radiator 330 during heating operation can be restricted. Generally, since the heating operation is performed when the temperature of the outside air is low, there is a high possibility that the cooling water is cooled during the flow of the cooling water pipe 360 even if the cooling water is not cooled by the radiator 330.

Accordingly, the first and second flow switching units 310 and 320 can be controlled so that the cooling water does not pass through the radiator 330 during the heating operation.

When the heat exchange in the auxiliary heat exchanger 150 is not required, the cooling water flows from the second flow switching unit 320 to the radiator 330 via the third guide pipe 365 It is possible.

Next, the driving of the engine 200 will be described.

The air filtered by the air filter 210 and the fuel regulated through the zero governor 230 are mixed in the mixer 220. The mixer mixed in the mixer 220 is pressurized by the supercharger 400 and the pressurized mixer is cooled by the intercooler 500 to improve the density.

The amount of the mixer having passed through the intercooler 500 is adjusted through the adjusting means 600 and supplied to the engine 200 to drive the engine 200. The exhaust gas discharged from the engine 200 flows into the exhaust gas heat exchanger 240, exchanges heat with the cooling water, and is discharged to the outside through the muffler 250.

Referring to FIG. 4, when the gas heat pump system 10 performs the cooling operation, the refrigerant passes through the compressor 110, the oil separator 115, the four sides 117, the outdoor heat exchanger (120) and the supercooling heat exchanger (130).

Then, the refrigerant is decompressed in the indoor expansion device 145, heat-exchanged in the indoor heat exchanger 140, and then introduced into the four sides 117. Here, the outdoor heat exchanger 120 may function as a " condenser " and the indoor heat exchanger 120 may function as an " evaporator. &Quot;

The refrigerant having passed through the four sides 117 flows into the auxiliary heat exchanger 150 and can be heat-exchanged with the cooling water flowing in the cooling water pipe 360. The refrigerant heat-exchanged in the auxiliary heat exchanger (150) flows into the gas-liquid separator (160), is phase-separated and then sucked into the compressor (110). The refrigerant can be repeatedly cycled through the above cycle.

When the cooling water pump 300 is driven, the cooling water discharged from the cooling water pump 300 flows along the supply pipe 361 and then flows into the first branch pipe 371 ) And the second branch pipe 372, respectively.

The refrigerant branched to the first branch pipe 371 flows into the exhaust gas heat exchanger 240 and is heat-exchanged with the exhaust gas. The cooling water discharged from the exhaust gas heat exchanger 240 flows into the engine 200 to cool the engine 200 and flows into the first flow switching unit 310 via the return pipe 362 ≪ / RTI >

The coolant flow until the coolant flows into the first flow switching unit 310 is the same as the coolant flow during the heating operation.

The cooling water that has passed through the first flow switching unit 310 flows into the second flow switching unit 320 and flows to the radiator 330 under the control of the second flow switching unit 320, . The cooling water cooled by the radiator (330) flows into the cooling water pump (300). The cooling water can be circulated by repeating this cycle.

On the other hand, the flow of cooling water to the auxiliary heat exchanger (150) during the cooling operation can be restricted. Generally, since the cooling operation is performed when the temperature of the outside air is high, heat absorption of the evaporation refrigerant for securing the evaporation performance may not be required. Therefore, the first and second flow switching units 310 and 320 can be controlled so that the cooling water does not pass through the auxiliary heat exchanger 150 during the cooling operation.

However, when it is necessary to perform heat exchange in the auxiliary heat exchanger 150, the cooling water may flow into the auxiliary heat exchanger 150 via the second flow switching unit 320.

The operation of the engine 200 is the same as that in the heating operation, and thus a detailed description thereof will be omitted.

According to the proposed embodiment, the intercooler can be cooled by using the cooling water for cooling the engine, and the cooling water flow path for cooling the engine is unnecessary. Therefore, not only the cooling water can be flowed to the intercooler side by using one cooling water pump but also the cooling water can be flowed to the engine side.

Further, since the cooling water for flowing to the intercooler is heat-exchanged with the low-temperature refrigerant, the cooling performance of the mixer in the intercooler is improved.

In addition, since the cooling water to be supplied to the exhaust gas heat exchanger is supplied to the exhaust gas heat exchanger in a state of being combined with the cooling water passing through the intercooler having a relatively low temperature, the heat exchanging performance of the exhaust gas heat exchanger and the cooling performance of the engine are improved .

10: Gas heat pump system 110: Compressor
120: outdoor heat exchanger 140: indoor heat exchanger
150: auxiliary heat exchanger 152: cooling water heat exchanger
200: engine 240: exhaust gas heat exchanger
300: coolant pump 322: flow control valve
361: supply pipe 362: return pipe
371: First branch pipe 372: Second branch pipe
400: supercharging means 500: intercooler
600: adjusting means

Claims (9)

An air conditioning module including a compressor, an outdoor heat exchanger, an expansion device, an indoor heat exchanger, and a refrigerant pipe;
An engine module including an engine that burns a mixture of fuel and air to provide power for operation of the compressor; And
And a cooling module through which cooling water for cooling the engine flows,
The engine module includes:
A mixer for mixing the air and the fuel and discharging the mixture to the engine side;
A supercharger disposed between the mixer and the engine for compressing the mixer discharged from the mixer and discharging the mixed gas to the engine; And
And an intercooler which is disposed between the engine and the supercharging means and cools the mixer compressed by the supercharging means,
The cooling module includes a supply pipe in which a coolant pump is installed,
A first branch pipe branched from the supply pipe and through which the cooling water to be supplied to the engine flows,
A second branch pipe branched from the supply pipe and through which cooling water to be supplied to the intercooler flows; And
And a flow regulating valve for regulating the flow of cooling water in the first branch pipe and the second branch pipe. The method according to claim 1,
Wherein the flow control valve is a three-way valve connected to the supply pipe,
Wherein the first branch pipe and the second branch pipe are connected to the flow control valve. The method according to claim 1,
Wherein the flow regulating valve is provided in each of the first branch pipe and the second branch pipe. The method according to claim 1,
And the second branch pipe is connected to the first branch pipe after passing through the intercooler. 5. The method of claim 4,
And a cooling water heat exchanger for cooling the cooling water flowing through the inlet pipe of the intercooler from the second branch pipe by performing heat exchange with the refrigerant of the refrigerant pipe. 6. The method of claim 5,
Wherein the cooling water heat exchanger heat-exchanges the refrigerant to be supplied to the compressor with the cooling water. 5. The method of claim 4,
Further comprising an exhaust gas heat exchanger into which exhaust gas exhausted from the engine flows,
And the first branch pipe is connected to the engine after passing through the exhaust gas heat exchanger. 8. The method of claim 7,
And the second branch pipe is connected to the inlet pipe of the exhaust gas heat exchanger in the first branch pipe. 8. The method of claim 7,
Further comprising a bypass pipe branched from an outlet pipe of the exhaust gas heat exchanger of the second branch pipe and connected to an outlet pipe of the exhaust gas heat exchanger after passing through the supercharging means.

Images