KR101533157B1 - A gas heat-pump system - Google Patents

Abstract

The present invention relates to a gas heat pump system.
A gas heat pump system according to an embodiment of the present invention includes an air conditioning system including a compressor, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger; An engine for supplying power for operating the compressor and burning mixed fuel in which fuel and air are mixed; An air filter provided at an inlet side of the engine for filtering the air; A zero governor for supplying the fuel to the engine at a pressure lower than a set pressure; And a muffler through which the exhaust gas of the combusted fuel flows, and the zero governor is coupled to the outer surface of the muffler to receive heat generated from the muffler.

Description

A gas heat-pump system

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 includes 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 includes 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 includes an engine that generates power by using a mixture of fuel and air (hereinafter referred to as mixed fuel). In one example, the engine may include a cylinder to which the mixed fuel is supplied and a piston that is provided movably in the cylinder.

The gas heat pump system includes an air supply device for supplying a mixed fuel 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. The fuel supply apparatus includes a zero governor for supplying fuel with 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). For example, the zero governor may include a nozzle unit for reducing the pressure of the fuel, a diaphragm for applying a pressure reduced in the nozzle unit, and a valve unit for opening and closing by the operation of the diaphragm .

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

And, when the mixed fuel supplied to the engine is burned, the exhaust gas can be discharged from the engine. The gas heat pump system further includes a muffler for reducing noise generated in the exhaust gas.

On the other hand, the performance of the zero governor can be increased or decreased according to the outside temperature. For example, when the outside air temperature falls below 0 ° C, the performance of the zero governor decreases, and when the outside air temperature falls below -20 ° C, the zero governor may break.

Therefore, the zero governor may be provided with a heater to prevent a temperature drop below the set temperature.

According to such a conventional gas heat pump system, since the heater is provided in the zero governor, there is a problem in that the cost of installing and driving the heater is increased.

If fuel leaks during operation of the zero governor, there is a possibility that a fire may be generated by the heat of the heater.

It is an object of the present invention to provide a gas heat pump system capable of heating a zero governor using exhaust gas heat of a muffler.

A gas heat pump system according to an embodiment of the present invention includes an air conditioning system including a compressor, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger; An engine for supplying power for operating the compressor and burning mixed fuel in which fuel and air are mixed; An air filter provided at an inlet side of the engine for filtering the air; A zero governor for supplying the fuel to the engine at a pressure lower than a set pressure; And a muffler through which the exhaust gas of the combusted fuel flows, and the zero governor is coupled to the outer surface of the muffler to receive heat generated from the muffler.

Further, the muffler includes a muffler case forming a flow space through which exhaust gas flows; And a coupling part formed with one side of the muffler case and coupled with the zero governor.

The muffler further includes a governor case disposed to be able to contact with a coupling portion of the muffler and accommodating the zero governor therein.

In addition, the zero governor includes a fuel inlet portion through which the fuel flows and a fuel outlet portion through which the pressure regulated fuel is discharged, and the Governor case includes a gas pipe connected to the fuel inlet portion or the fuel inlet portion, And a through hole is formed through the through hole.

Further, the Governor case includes a bottom part on which the zero governor is seated, and the bottom part is in contact with the engaging part of the muffler.

In addition, a heat transfer portion provided between the coupling portion of the muffler and the Governor case for promoting heat transfer from the muffler to the Governor case is further included.

The Governor case is made of an aluminum material.

An exhaust gas inlet provided in the muffler case for allowing exhaust gas to flow into the muffler; And an exhaust gas outlet provided in an engagement portion of the muffler for exhausting the exhaust gas from the muffler, wherein the Governor case is formed with a coupling hole through which the exhaust gas inlet portion or the exhaust gas outlet portion passes .

In addition, the coupling hole is provided with a sealing member for preventing leakage of the fuel gas present in the Governor case to the outside.

Further, the zero governor is in direct contact with the engaging portion of the muffler.

The governor case is provided in a shape corresponding to the shape of the muffler case and houses the zero governor therein. The periphery of the Governor case is coupled to the periphery of the muffler case do.

In addition, the muffler case and the Governor case are cylindrical in shape, and the muffler case and the Governor case have the same diameter.

According to the gas heat pump system according to the embodiment of the present invention, the heat of the exhaust gas generated in the muffler, that is, the heat discharged to the outside can be transmitted to the zero governor, so that the heater provided to the zero governor can be omitted, It is possible to reduce the driving time of the display device.

Particularly, since the case in which the zero governor is accommodated is configured to directly contact one surface of the muffler, heat transfer from the muffler to the zero governor can be facilitated. Further, the case may be made of a metal material having a good heat transfer rate, and a heat transfer promoting material may be applied between the muffler and the case to obtain a better heat transfer effect.

Further, since the exhaust gas inlet or outlet of the muffler is configured to pass through the case, the area of contact between the case and one surface of the muffler is increased, and the heat transfer efficiency can be improved.

Further, since the outer appearance of the case is formed to correspond to the case shape of the muffler, and the zero governor is directly brought into contact with the one surface of the muffler inside the case, the volume of the zero governor and the muffler assembly can be reduced and the heat transfer efficiency can be increased .

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 cycle diagram showing the flow of refrigerant, cooling water and mixed fuel in the heating mode operation in the gas heat pump system.
3 is a cycle diagram showing the flow of the refrigerant, cooling water and mixed fuel in the cooling mode operation in the gas heat pump system.
4 is a perspective view showing an integral structure of a muffler and a zero governor according to the first embodiment of the present invention.
5 is a plan view showing an integrated structure of a muffler and a zero governor according to the first embodiment of the present invention.
6 is a perspective view showing an integral structure of a muffler and a zero governor according to a second embodiment of the present invention.
7 is a plan view showing an integrated structure of a muffler and a zero governor according to a second embodiment of the present invention.
8 is a perspective view showing an integral structure of a muffler and a zero governor according to a third embodiment of the present invention.
9 is a plan view showing an integrated structure of a muffler and a zero governor according to a third embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

1 is a cycle diagram showing a configuration of a gas heat pump system according to an embodiment of the present invention.

Referring to FIG. 1, a gas heat pump system 10 according to an embodiment of the present invention includes a plurality of components constituting a refrigerant cycle as an air conditioning system. The refrigerant cycle includes a first compressor 110 and a second compressor 112 for compressing a refrigerant, an oil separator 115 for separating oil from refrigerant compressed in the first and second compressors 110 and 112, 115 for switching the direction of the refrigerant.

The gas heat pump system (10) further includes 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 flows into the outdoor heat exchanger 120 or the indoor heat exchanger 140.

On the other hand, 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. [

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

The system 10 further includes a refrigerant pipe 170 connecting the compressors 110 and 112, the outdoor heat exchanger 120 and the indoor heat exchanger 140 to guide the flow of the refrigerant.

The configuration of the 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. One side of the outdoor heat exchanger (120) includes an outdoor fan (122) for blowing outdoor air.

At the outlet side of the outdoor heat exchanger (120), a main expansion device (125) for depressurizing the refrigerant is provided. For example, the main expansion device 125 includes 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), there is provided a supercooling heat exchanger (130) for further cooling the refrigerant. A supercooling flow path 132 is connected to the supercooling heat exchanger 130. The supercooling flow path 132 is branched from the refrigerant pipe 170 and connected to the supercooling heat exchanger 130.

The supercooling flow path 132 is 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 flow path 132 is absorbed.

The supercooling flow path (132) is 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 evaporated in the indoor heat exchanger (140) flows 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. At the outlet side of the auxiliary heat exchanger (150), a gas-liquid separator (160) for separating the gaseous refrigerant in the evaporated refrigerant is provided.

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 first and second compressors 110 and 112.

The gas heat pump system 10 further includes a cooling water tank 305 for storing cooling water and a cooling water pipe 360 for guiding the flow of the cooling water. The cooling water pipe 360 is provided with a cooling water pump 300 for generating the flow of the cooling water, a plurality of flow switching units 310 and 320 for switching the flow direction of the cooling water, and a radiator 330 for cooling the cooling water. Can be installed.

The plurality of flow switching units 310 and 320 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 installed 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 to be described later, and the first flow switching unit 310 and the second flow The refrigerant can be selectively flowed to the radiator 330 or the auxiliary heat exchanger 150 via the switching unit 320. [

The gas heat pump system 10 is provided with an engine 200 for generating power for driving the first and second compressors 110 and 120 and a mixer 220).

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 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).

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 mixed fuel. The mixed fuel may be supplied to the engine 200.

The gas heat pump system 10 is provided with 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 mixed fuel 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.

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.

2 is a cycle diagram showing the flow of refrigerant, cooling water and mixed fuel in the heating mode operation in the gas heat pump system.

When the gas heat pump system 10 performs the heating operation, the refrigerant is circulated through the first and second compressors 110 and 112, the oil separator 115, the four sides 117, the indoor heat exchanger 140, The refrigerant is depressurized in the main expansion device 125 and is heat-exchanged in the outdoor heat exchanger 120 and 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 passing through the four sides 117 flows into the auxiliary heat exchanger 150 and can be heat-exchanged with the cooling water flowing through the cooling water pipe 360. 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 first and second compressors (110, 112). The refrigerant can be repeatedly cycled through the above cycle.

On the other hand, when the coolant pump 300 is driven, the coolant discharged from the coolant pump 300 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 flow into the first flow switching unit 310.

The cooling water passing through the first flow switching unit 310 is directed to the second flow switching unit 320 under the control of the first flow switching unit 310. The cooling water flowing through the second flow switching unit 320 flows into the auxiliary heat exchanger 150 and can be heat-exchanged with the refrigerant. The cooling water passing through the auxiliary heat exchanger (150) 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 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 in the process of flowing through 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.

However, when the heat exchange in the auxiliary heat exchanger 150 is not required, the cooling water may flow into the radiator 330 via the second flow switching unit 320. [

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 mixed fuel mixed in the mixer 220 is 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.

3 is a cycle diagram showing the flow of the refrigerant, cooling water and mixed fuel in the cooling mode operation in the gas heat pump system.

When the gas heat pump system 10 performs the cooling operation, the refrigerant is circulated through the first and second compressors 110 and 112, the oil separator 115, the four sides 117, the outdoor heat exchanger 120, The refrigerant is decompressed in the indoor expansion device 145 and is heat-exchanged in the indoor heat exchanger 140 and flows into the four sides 117 again. 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 passing through the four sides 117 flows into the auxiliary heat exchanger 150 and can be heat-exchanged with the cooling water flowing through 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 first and second compressors (110, 112). The refrigerant can be repeatedly cycled through the above cycle.

On the other hand, when the coolant pump 300 is driven, the coolant discharged from the coolant pump 300 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 flow into the first flow switching unit 310. 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.

Hereinafter, the integrated structure of the muffler 250 and the zero governor 230 according to the embodiment of the present invention will be described.

FIG. 4 is a perspective view showing an integral structure of a muffler and a zero governor according to a first embodiment of the present invention, and FIG. 5 is a plan view showing an integrated structure of a muffler and a zero governor according to the first embodiment of the present invention.

4 and 5, the muffler 250 and the zero governor 230 according to the first embodiment of the present invention may be integrally formed.

Specifically, the muffler 250 includes a muffler case 251 that forms a flow space through which the exhaust gas flows. The muffler case 251 is formed with a coupling portion 252 having a coupling surface to which the zero governor 230 is coupled.

The muffler case 251 has a substantially cylindrical shape. An exhaust gas inlet 253 for guiding the flow of the exhaust gas is formed on the outer circumferential surface of the muffler case 251. The coupling portion 252 is formed with an exhaust gas outlet portion 255 for guiding exhaust of the exhaust gas flowing inside the muffler 250.

Sectional area of the muffler case 251 is increased from the exhaust gas inlet portion 253 toward the exhaust gas outlet portion 255 on the basis of the flow direction of the exhaust gas, The combustion noise of the engine 200 can be reduced.

The zero governor 230 is coupled to the upper surface of the muffler case 251.

In detail, the zero governor 230 includes a fuel inlet portion 233 for guiding the inflow of fuel and a fuel outlet portion 235 for guiding the discharge of the pressure regulated fuel. A gas pipe 270 through which the fuel flows is coupled to the fuel inlet portion 233.

A Governor case (231) is provided outside the zero governor (230). The Governor case 231 has a substantially rectangular parallelepiped shape and is disposed so as to surround the zero governor 230. That is, the zero governor 230 may be received in the inside of the Governor case 231 and may be seated in the bottom of the Governor case 231.

Since the Governor case 231 is provided, even if fuel leakage occurs in the zero governor 230, the fuel is collected inside the Governor case 231 and is not leaked to the outside, so that safety can be secured.

A through hole 232 through which the gas pipe 270 or the fuel inlet 233 is passed may be formed in the Governor case 231. The gas pipe 270 and the fuel inlet 233 may be coupled through the through-hole 232.

The governor case 231 is provided with a contact surface 231a which is arranged so as to be able to contact with the engaging portion 252 of the muffler case 251 and a case upper surface portion 231b which shields the upper portion of the zero governor 230, . The contact surface 231a and the case upper surface portion 231b may be disposed to face each other.

The contact surface 231a may form at least a part of the lower surface of the Governor case 231 and may be in contact with a mating surface formed in the mating part 252 of the muffler case 251. [

The heat generated in the muffler 250 may be transferred to the zero governor 230 through the Governor case 231 by a conduction method. The Governor case 231 may be made of a metal material having a good heat transfer coefficient, for example, aluminum.

A heat transfer part for promoting heat transfer from the muffler 250 to the Governor case 231 may be disposed between the Governor case 231 and the engaging part 252 of the muffler case 251 have. The heat transfer part includes a thermal grease.

According to this configuration, since the heat generated in the muffler 250 can be easily transferred to the zero governor 230, the configuration of the heater provided to maintain the temperature of the zero governor 230 is omitted Or the operation time of the heater or the output of the heater can be reduced.

In particular, when the system 10 is installed in a low temperature region, it is possible to prevent the heater power from being excessively consumed to maintain the temperature of the zero governor 230 at a predetermined temperature or higher.

Hereinafter, the second to third embodiments of the present invention will be described. These embodiments differ from the first embodiment only in the coupling structure of the muffler and the zero governor, and therefore, differences will be mainly described. The same or similar parts to those of the first embodiment will be described with reference to the description of the first embodiment and the reference numerals .

FIG. 6 is a perspective view showing an integral structure of a muffler and a zero governor according to a second embodiment of the present invention, and FIG. 7 is a plan view showing an integrated structure of a muffler and a zero governor according to a second embodiment of the present invention.

6 and 7, the gas heat pump system according to the second embodiment of the present invention includes a muffler 450 and a zero governor 430 combined with or integrally formed with the muffler 450 .

The muffler 450 includes a muffler case 451 and a coupling portion 452. An exhaust gas inlet 453 is formed in the muffler case 451 and an exhaust gas outlet 455 is formed in the coupling part 452.

The zero governor 430 includes a fuel inlet 433 and a fuel outlet 435. The governor case 431 includes a case 431 for shielding the upper portion of the zero governor 430, And an upper surface portion 431b. The configuration of the muffler 450 and the zero governor 430 is similar to that of the first embodiment, and thus a detailed description thereof will be omitted.

The zero governor 430 is coupled to the upper surface of the muffler case 451.

In detail, the Governor case 431 includes a contact surface 431a that is disposed so as to be able to contact with the engaging part 452 of the muffler case 451. The contact surface 431a may form at least a part of the lower surface of the Governor case 431 and may be in contact with a mating surface formed at the mating part 452 of the muffler case 451. [

The contact area between the contact surface 431a and the engaging portion 452 can be substantially larger than that of the first embodiment. That is, the size of the contact surface 431a may correspond to the size of most of the area of the coupling portion 452. [ It can be inferred that the larger the contact area or heat transfer area, the better the heat transfer rate is.

The lower portion of the Governor case 431 has a coupling hole 337 to which the exhaust gas outlet 455 is coupled. The exhaust gas outlet 455 may extend from the engaging portion 452 to the outside of the Governor case 431 through the engaging hole 337.

The exhaust gas outlet portion 455 may be provided in the muffler case 451 and the exhaust gas inlet portion 453 may be provided in the engaging portion 452. [ In this case, the exhaust gas inlet 453 may be coupled to the through-hole 337.

Between the exhaust gas outlet 455 and the coupling hole 337 is disposed a gap between the exhaust gas outlet 455 and the coupling hole 337 to prevent leakage of mixed fuel components that may exist inside the Governor case 431 to the outside of the Governor case 431 A sealing member may be provided.

The heat generated in the muffler 450 may be transferred to the zero governor 430 through the Governor case 431 by a conduction method.

According to this structure, since the contact area between the muffler 450 and the Governor case 431 can be increased, the heat transfer efficiency can be improved.

FIG. 8 is a perspective view showing an integrated structure of a muffler and a zero governor according to a third embodiment of the present invention, and FIG. 9 is a plan view showing an integrated structure of a muffler and a zero governor according to a third embodiment of the present invention.

8 and 9, the gas heat pump system according to the second embodiment of the present invention includes a muffler 550 and a zero governor 530 combined with or integrally formed with the muffler 550 .

The muffler 550 includes a muffler case 551 and an engaging portion 552. An exhaust gas inlet portion 553 is formed in the muffler case 551 and an exhaust gas outlet portion 555 is formed in the coupling portion 452.

The zero governor 530 includes a fuel inlet 533 and a fuel outlet 535. The governor case 531 is provided with a case upper surface 530 shielding the upper portion of the zero governor 530, Section 531b. The exhaust gas outlet portion 555 may be arranged to pass through the case upper surface portion 531b of the Governor case 531.

The Governor case 531 may have a substantially cylindrical shape. The cylindrical diameter of the Governor case 531 may be the same as the cylindrical diameter of the muffler case 551. Therefore, the periphery of the Governor case 531 can be coupled to the periphery 551a of the muffler case 551, for example, by welding.

Meanwhile, the lower surface or the contact surface described in the first and second embodiments may not be formed in the Governor case 531. The zero governor 530 may be disposed so as to be able to contact the engaging portion 552 of the muffler case 550 directly.

The outer space of the zero governor 530 is shielded by the coupling portion 552 between the governor case 531 and the case upper portion 531b and the muffler case 550, (530) can receive heat directly from the coupling portion (552).

According to such a configuration, it is not necessary to provide a separate contact surface in the Governor case, and heat transfer can be performed directly from the muffler to the zero governor, so that the heat transfer effect can be improved.

10: gas heat pump system 110, 112: first and second compressors
120: outdoor heat exchanger 140: indoor heat exchanger
150: auxiliary heat exchanger 200: engine
210: air filter 230: zero governor
231: Governer case 231a: contact surface
231b: Case upper surface portion 232: Through hole
233: fuel inlet part 2345: fuel outlet part
240: Exhaust gas heat exchanger 250: muffler
251: muffler case 252:
253: exhaust gas inlet part 255: exhaust gas outlet part
300: cooling water pump 310: first flow switching section
320: second flow switching unit 330: radiator

Claims (12)

An air conditioning system including a compressor, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger;
An engine for providing power for operating the compressor;
An air filter provided on an inlet side of the engine, for filtering air;
A zero governor for supplying the fuel to the engine at a pressure lower than a set pressure;
A Governor case accommodating the zero governor;
A mixer for supplying the engine with mixed fuel obtained by mixing air passing through the air filter and fuel passing through the zero governor; And
And a muffler for reducing noise generated in the exhaust gas of the mixed fuel burned in the engine,
A muffler case forming a flow space of the exhaust gas;
An exhaust gas inlet provided on an outer surface of the muffler case for guiding inflow of the exhaust gas;
An exhaust gas outlet provided on an outer surface of the muffler case for guiding the exhaust gas discharged from the flow space of the exhaust gas; And
A muffler case formed in the muffler case and including a coupling portion having a coupling surface in contact with the Governor case or the zero governor,
And the heat generated in the muffler is transferred to the Governor case or the Zero Governor through the coupling part. delete delete The method according to claim 1,
Wherein the zero governor includes a fuel inlet portion through which the fuel flows and a fuel outlet portion through which the pressure regulated fuel is discharged,
In the Governor case,
Wherein a through hole is formed through the gas inlet or the gas inlet to the fuel inlet. The method according to claim 1,
In the Governor case,
And a lower surface portion on which the zero governor is seated, wherein the lower surface portion is in contact with the engaging portion of the muffler. The method according to claim 1,
And a heat transfer portion provided between the coupling portion of the muffler and the Governor case for promoting heat transfer from the muffler to the Governor case. The method according to claim 1,
Wherein the Governor case is made of an aluminum material. The method according to claim 1,
Wherein the Governor case is formed with a coupling hole through which the exhaust gas inlet part or the exhaust gas outlet part passes. 9. The method of claim 8,
Wherein the coupling hole is provided with a sealing member for preventing leakage of fuel gas present in the Governor case to the outside. delete The method according to claim 1,
And the periphery of the Governor case is coupled to the periphery of the muffler case. 12. The method of claim 11,
The muffler case and the Governor case are cylindrical in shape,
Wherein the muffler case and the Governor case have the same diameter.

Images