KR101507448B1 - Co-generation system - Google Patents

Abstract

The cogeneration system of the present invention includes a generator for generating electric power, an engine for driving the generator, a cooling unit for absorbing the heat of the exhaust gas discharged from the engine and the engine while the heating medium flows and a heat medium flowing through the cooling unit A first heat exchanger having a first heat medium flow path and a first refrigerant flow path through which the refrigerant flows, and a compressor for compressing the refrigerant. The generator, the engine, the cooling unit, the first heat exchanger, and the compressor are installed integrally in the cabinet. And a second heat exchanger installed outside the cabinet and having a second refrigerant passage through which the refrigerant condensed / evaporated in the cabinet passes. Therefore, according to the present invention, heat exchange is performed between the heating medium and the refrigerant in the cooling cycle by using one heat exchanger, thereby reducing the installation area and reducing the component cost.

Cogeneration system, heat exchanger, cooler, water heater, heating medium

Description

Co-generation system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cogeneration system, and more particularly, to a cogeneration system in which heat dissipation of a heating medium and condensation / evaporation of a refrigerant are performed in a single heat exchanger.

Generally, a cogeneration system is a device that generates electricity using fossil fuels, supplies the generated power to a power consumption source such as lighting, and uses heat generated from the power generation to generate heat.

In the conventional power generation system, a part of energy used for power generation is discharged as exhaust heat, resulting in low energy efficiency. On the other hand, the cogeneration system can increase the efficiency of energy by using the discharged exhaust heat as thermal energy. The thermal energy can be used for various purposes according to the demand of the user, but generally, when there is a user's demand for hot water, the thermal energy is used to raise the temperature of the water.

Specifically, a heat medium is used to cool the engine, which absorbs the heat of the exhaust gas discharged from the engine and the engine that provides the driving force to the generator. Then, the heat absorbing heat medium is flowed to the heat exchanger or the hot water demanding site to heat or supply the absorbed heat. That is, the heat medium is circulated and absorbed heat to provide a heat source.

Further, in recent years, the cogeneration system has an outdoor unit of an air conditioner and a cogeneration unit as an integral unit. Thus, the power generated by the cogeneration power is supplied to the air conditioner.

However, in the cogeneration system according to the related art, there is a problem that the heat exchanger for dissipating the waste heat of the engine absorbed by the heating medium and the outdoor heat exchanger of the air conditioner are separately provided, so that the number of parts is large and the structure is complicated.

An object of the present invention is to provide a cogeneration system in which the cogeneration unit and the outdoor unit of the air conditioner are integrated to reduce the installation area of the entire cogeneration system and increase the convenience of installation.

Another object of the present invention is to provide a cogeneration system in which the heat exchanger for dissipating the waste heat of the engine absorbed by the heating medium and the outdoor heat exchanger of the air conditioner are integrated to reduce the number of components of the entire system and simplify the structure.

Another object of the present invention is to provide a cogeneration system in which heat energy is increased by dissipating heat generated by a heating medium to hot water to be supplied to a user when there is a user's demand for hot water.

According to an aspect of the present invention, there is provided a cogeneration system including: a cabinet disposed outdoors; A generator disposed inside the cabinet and generating electric power; An engine disposed in the cabinet for driving the generator; A heat absorber disposed inside the cabinet and absorbing heat discharged from the engine and the generator while the heat medium flows; A compressor disposed inside the cabinet for compressing and discharging the refrigerant; A first heat medium flow path through which the heating medium flows and a first refrigerant flow path through which the refrigerant circulated by the compressor flows; a heat exchange unit for heat-exchanging heat between the first heat medium passage and the first refrigerant passage; A first heat exchanger; A second heat exchanger disposed in the room, the second heat exchanger being connected to the compressor and the first heat exchanger to constitute a heat pump cycle in which the refrigerant is circulated; And a first heat medium circulation passage for circulating the heat medium by connecting the heat absorbing portion and the first heat medium passage.
According to another aspect of the present invention, there is provided a cogeneration system comprising: a cabinet disposed outdoors; A generator disposed inside the cabinet and generating electric power; An engine disposed in the cabinet for driving the generator; A heat absorber disposed inside the cabinet and absorbing heat discharged from the engine and the generator while the heat medium flows; A compressor disposed inside the cabinet for compressing and discharging the refrigerant; A first heat medium flow path through which the heating medium flows and a first refrigerant flow path through which the refrigerant circulated by the compressor flows; a heat exchange unit for heat-exchanging heat between the first heat medium passage and the first refrigerant passage; A first heat exchanger; A second heat exchanger disposed in the room, the second heat exchanger being connected to the compressor and the first heat exchanger to constitute a heat pump cycle in which the refrigerant is circulated; A first heat medium circulation passage for circulating the heat medium by connecting the heat absorbing portion and the first heat medium passage; An expansion tank connected to the first heat medium circulation channel and storing a gaseous heat medium evaporated during the passage through the heat absorption unit; A first expansion valve disposed inside the cabinet for expanding the refrigerant flowing into the first refrigerant passage of the first heat exchanger during heating operation; A first expansion valve disposed in the cabinet and connected in parallel to the first expansion valve to cool the refrigerant discharged from the first refrigerant passage of the first heat exchanger during the cooling operation to bypass the first expansion valve, Check valve; A second expansion valve disposed in the room for expanding a refrigerant flowing into the second heat exchanger during a cooling operation; And a second check valve disposed in the room and connected in parallel with the second expansion valve so that the refrigerant discharged from the second heat exchanger during the heating operation is bypassed instead of passing through the second expansion valve.

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The cogeneration system according to the present invention having the above-described configuration has the following effects.

First, by integrating the cogeneration unit and the outdoor unit of the air conditioner, the installation area of the cogeneration unit is reduced and the installation convenience is increased. Also, the unit cost of the entire cogeneration system can be lowered.

Secondly, a heat exchanger for dissipating the waste heat of the engine absorbed by the heat medium and an outdoor heat exchanger of the air conditioner are integrally provided. Therefore, the number of parts of the entire system can be reduced and the structure of the entire cogeneration system can be simplified.

Third, it is an object of the present invention to provide a cogeneration system in which heat energy is increased by radiating heat to hot water to be supplied to a user when there is a user's request for hot water.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the embodiments, the same names and the same reference numerals are used for the same components, and further description thereof will be omitted.

First Embodiment

FIG. 1 is a view showing a flow of a refrigerant and a heating medium during cooling of a cogeneration system according to a first embodiment of the present invention. FIG. 2 is a view showing a flow of a refrigerant and a heating medium during heating of the cogeneration system of the first embodiment FIG.

The overall configuration of the cogeneration system according to the first embodiment will be described with reference to Figs. 1 and 2. Fig.

The cogeneration system according to the present embodiment includes a cogeneration unit that generates electricity and dissipates heat generated during power generation, and an outdoor unit of the air conditioner. And some of the power generated by the cogeneration unit can be supplied to the outdoor unit of the air conditioner.

The cogeneration power generator includes a generator 4, an engine 8, a heat absorbing portion 20, and a first heat exchanger 30. The generator 4, the engine 8, the heat absorber 20 and the first heat exchanger 30 are integrally installed in the cabinet 2. [

The cabinet 2 is provided with a compressor 70 constituting an outdoor unit of the air conditioner and serves as an outdoor heat exchanger of the air conditioner by the first heat exchanger 30 of the cogeneration power generator. The second heat exchanger 90 corresponding to the indoor heat exchanger of the air conditioner is installed outside the cabinet 2. [

As a result, the cogeneration system according to the present embodiment includes a cogeneration power generator and an outdoor unit of the air conditioner integrally in one cabinet 2. Furthermore, the first heat exchanger (30) that dissipates the heat of the heat medium in the cogeneration power generator serves as an outdoor heat exchanger of the air conditioner. Therefore, the installation area of the entire cogeneration system is remarkably reduced and the installation work is easy. Furthermore, since one heat exchanger is used to condense / evaporate the refrigerant, heat is dissipated from the heat medium and the number of components is reduced, which is advantageous in space and cost.

The generator (4) is connected to the output shaft of the engine (8) by either an AC generator or a DC generator to produce electric power when the output shaft rotates. The generator 4 is connected to the cooling cycle or other power load 3 and the power lines 5 and 6 to supply the produced power through the power lines 5 and 6.

On the other hand, power switches 5a and 6a are provided in each of the power lines 5 and 6 to open and close each of the power lines 5 and 6 according to whether power is required or not.

The engine 8 is driven by fossil fuels such as gas or oil. However, another drive source such as a fuel cell may be used instead of the engine 8. The engine 8 is provided with a fuel injection port 9 through which fuel such as gas or oil is injected, an intake port 10 through which external air is sucked, and an exhaust gas exhausted from the engine. The exhaust gas is discharged to the outside of the cabinet 2 And the exhaust port 11 is provided.

The heat absorbing portion 20 serves to absorb the heat of the engine 8 and the engine exhaust port 11 while the heat medium flows. The heating medium flows into the heat absorbing portion 20 through the heat absorbing portion inlet 20a and is discharged to the outside of the heat absorbing portion 20 through the heat absorbing portion outlet 20b.

The heat absorbing part 20 includes an engine heat absorbing part 21 for recovering the heat of the engine 8 while the heating medium flows and an exhaust heat absorbing part 23 for recovering the heat of the exhaust port 11 while the heat medium flows, .

On the other hand, a plurality of exhaust heat absorbers 23 may be provided in the exhaust openings 11, but in the present embodiment, two exhaust heat absorbers 23 are used to recover heat. Specifically, the heat medium introduced through the heat absorbing portion inlet 20a sequentially recovers heat while flowing through the two exhaust heat absorbing portions 23 sequentially. Further, the heat is recovered while flowing through the engine heat absorbing part 21, and then flows out of the heat absorbing part 20 through the heat absorbing part outlet 20b. The inlet 25a of the heat absorbing portion 20a may be provided with a pump 25 for applying a circulating force to the heating medium. Between the engine heat absorbing portion 21 and the exhaust heat absorbing portion 23, a pump 25 for imparting a circulating force to the heat medium may be located.

The first heat exchanger 30 has a first heat medium passage 31 through which the heat medium having passed through the heat absorber 20 flows and a first refrigerant passage 32 through which the refrigerant flows, which will be described later. Hereinafter, the heat exchange of the heat medium in the first heat exchanger 30 will be described, and the heat exchange of the refrigerant will be described later.

The heat medium that has absorbed the heat while passing through the heat absorbing portion 20 passes through the first heat medium flow passage 31 located in the first heat exchanger 30. Then, heat is released by heat exchange with the outdoor air blown by the blower 33, and flows to the heat absorbing part 20 again.

Specifically, the first heat medium flow path 31 is connected to the heat absorbing portion 20 and the first heat medium circulation path 34. The first heat medium circulation passage 34 includes a first heat medium inlet passage 34a and a first heat medium outlet passage 34b. The first heat medium inlet flow path 34a is connected to the heat absorbing portion outlet 20a to flow the heat medium discharged from the heat absorbing portion 20 to the first heat medium flow path 31. [ The first heat medium flow passage 34b is connected to the heat absorbing portion inlet 20a to flow the refrigerant flowing out of the first heat medium flow passage 31 to the heat absorbing portion 20. [

The expansion tank 40 receives the gaseous heat medium evaporated during the process of passing through the heat absorber 20, thereby lowering the pressure of the entire heat medium flow path. Accordingly, the gas-phase heating medium, which is connected to the first heating medium inlet flow path 34a and flows through the heat absorbing portion outlet 20b, flows into the expansion tank 40 without flowing into the first heating medium flow path 31 .

The expansion tank 40 replenishes the poor heat medium when the circulating heat medium is insufficient. Accordingly, when the heating medium is insufficient, the heating medium is allowed to flow into the heat absorbing portion 20 through the heat absorbing portion inlet 20a.

Hereinafter, the circulation process of the heat medium will be explained.

As described above, the heat medium absorbs heat while passing through the heat absorbing portion 20 as a whole, passes through the first heat medium passage 31 in the first heat exchanger 30 and emits heat absorbed by the heat absorbing portion 20 do. The first heat medium flow path 31 is connected to the heat absorbing portion 20 and the first heat medium circulation path 34. Specifically, the heat medium circulated by the pump 25 flows through the heat absorber inlet 20a and sequentially passes through the two exhaust heat absorbers 23 to recover the heat of the exhaust gas. And absorbs the heat of the engine 8 while passing through the engine heat absorbing portion 21. [ The heat-absorbing heat medium flows out through the heat absorber outlet 20b and then flows into the first heat medium passage 31 through the first heat medium inlet passage 34a. The inflowing heat medium passes through the first heat medium flow path and releases the heat absorbed by the outdoor air blown by the blower 33. The heat medium that has released the heat is discharged to the outside of the first heat exchanger 30, flows through the first heat medium outlet flow path 34b, and flows into the heat absorption portion inlet 20a through the pump 25. That is, the heat medium circulates through the cycle through the heat absorption and heat radiation process.

Hereinafter, the cooling cycle of the air conditioner constituting a part of the cogeneration system of the present embodiment will be described.

The cooling cycle of the present embodiment includes a compressor 70, an expansion mechanism 80, a first heat exchanger 30, a second heat exchanger 90 and a four-way valve 100. The compressor 70, the first heat exchanger 30 and the four-way valve 100 are located inside the cabinet 2 and the second heat exchanger 90 is located outside the cabinet 2. [ In addition, two expansion mechanisms (80) are provided, one of which is located inside the cabinet (2) and the other is located outside the cabinet (2). That is, the cabinet 2 corresponds to the outdoor unit of the general air conditioner, and the case 94 including the second heat exchanger 90 corresponds to the indoor unit of the general air conditioner.

The compressor 70 applies a circulation force so that the refrigerant can circulate in the cooling cycle while compressing the refrigerant. Meanwhile, in the present embodiment, the generator 4 and the power line 6 are connected to receive the power of the generator 4. An accumulator (71) for accumulating liquid refrigerant is connected to an inlet pipe through which the refrigerant of the compressor flows.

The expansion mechanism (80) comprises an electronic expansion valve such as LEV, which expands the refrigerant before the refrigerant passes through the heat exchanger and evaporates. The expansion mechanism (80) is constituted as one unit, and it is possible to expand the refrigerant during the cooling operation and during the heating operation, respectively. However, in this embodiment, the first expansion valve 81 for expanding the refrigerant flowing into the first heat exchanger 30 during the heating operation and the first expansion valve 81 are also connected in parallel to the first heat exchanger 30 for expanding the refrigerant flowing into the second heat exchanger (90) during the cooling operation, a second check valve (82) for bypassing the first expansion valve (81) A valve 83 is connected to the second expansion valve 83 in parallel so that the refrigerant discharged from the second heat exchanger 90 during the heating operation is bypassed without passing through the second expansion valve 83, And a check valve (84). The first expansion valve 81 and the first check valve 82 are located in the cabinet 2 and the second expansion valve 83 and the second check valve 84 are located inside the cabinet 2, (94).

The cooling cycle of the present invention includes a first heat exchanger (30), a second heat exchanger (90), a compressor (70), and an expansion valve (80) Further comprising a valve (100).

The first heat exchanger (30) includes the first heat medium passage (31) and the first refrigerant passage (32) through which the refrigerant flows. That is, the refrigerant passing through the first refrigerant passage 32 is condensed / evaporated by heat exchange with the outdoor air blown by the blower 33. As a result, the heat medium passing through the first heat medium passage 31 and the refrigerant passing through the first refrigerant passage 32 are heat-exchanged by the outdoor air blown by the single blower 33. That is, in this embodiment, the first heat exchanger 30 constituting a part of the cooling cycle is formed so as to include the engine 4 and the first heat medium flow path 31 for cooling the heat medium that has cooled the engine exhaust port 11. [ Therefore, it is not necessary to provide a separate heat exchanger for cooling the heating medium, so that it is possible to reduce the cost and size of the entire cabinet 2 in producing the entire cogeneration power plant.

The first heat medium flow path 31 and the first refrigerant flow path 32 may be arranged in parallel in the flow direction of the air, but are arranged in series in the flow direction of the refrigerant in this embodiment. Therefore, the size of the first heat exchanger can be made smaller and the size of the blower 33 can be made smaller than in the case of being arranged in parallel.

The second heat exchanger 90 constitutes a part of the cooling cycle. A second refrigerant passage 91 is provided in the second heat exchanger 90 to condense or evaporate the refrigerant flowing in the second refrigerant passage 91 in accordance with cooling and heating. And the second heat exchanger (90) is located outside the cabinet (2). And may be located inside the separate case 94. The second heat exchanger (90) may be provided in one or more, and three second heat exchangers (90) are provided in the present embodiment. The case 94 may be located at a place where cooling / heating is required, but it is generally located in a room such as a building to cool / heat the room air. That is, in this embodiment, the case 93 serves as an indoor unit of a conventional separate air conditioner. Therefore, the second expansion valve 83 and the second check valve 84 described above are located inside the case 94. [ And a blowing fan 93 for sucking and discharging the air in the room. Therefore, the refrigerant flowing through the second refrigerant passage 91 performs heat exchange with the indoor air introduced by the blowing fan 93.

Hereinafter, the flow of the refrigerant in the cooling cycle of this embodiment will be described.

The flow of refrigerant during cooling will be described with reference to Fig. The first heat exchanger 30 functions as a condenser for condensing the refrigerant and the second heat exchanger 90 functions as an evaporator for evaporating the refrigerant. That is, in the second refrigerant passage 91 of the second heat exchanger 90, the refrigerant evaporates while exchanging heat with the room air blown by the blowing fan 93. The evaporated refrigerant passes through the four-way valve (100) and flows into the accumulator (71). The liquid refrigerant in the refrigerant vaporized in the accumulator (71) accumulates and the gaseous refrigerant flows into the compressor (70). The refrigerant compressed in the compressor (70) passes through the four-way valve (100) and flows into the first refrigerant passage (32) of the first heat exchanger (30). The refrigerant is condensed by heat exchange with the outdoor air while passing through the first refrigerant passage 32. The refrigerant is expanded in the second expansion valve 83 through the first check valve 82 and then flows into the second heat exchanger 90 ) And evaporates.

The flow of the refrigerant at the time of heating will be described with reference to Fig. The refrigerant flowing through the second refrigerant passage (91) of the second heat exchanger (90) condenses while exchanging heat with the room air. The room air blown by the blower 93 absorbs heat to heat the room. The refrigerant condensed in the second heat exchanger (90) passes through the second check valve (84) and is expanded in the first expansion valve (81). The expanded refrigerant passes through the first refrigerant passage (32) of the first heat exchanger (30) and is evaporated by heat exchange with outdoor air. The evaporated refrigerant passes through the four-way valve 100 and flows into the accumulator 71 so that the liquid refrigerant accumulates and the gaseous refrigerant flows into the compressor 70 and is compressed. The compressed refrigerant flows into the second heat exchanger (90) and is condensed.

Second Embodiment

3 is a block diagram illustrating the flow of heat medium and refrigerant of the cogeneration system according to the second embodiment of the present invention.

Referring to FIG. 3, the cogeneration unit of the present embodiment further includes a third heat exchanger 110. The third heat exchanger 110 may be installed inside or outside the cabinet 2. In the present embodiment, the third heat exchanger 110 may be installed inside the cabinet 2 to reduce the size of the entire cogeneration unit, There is an effect that can be reduced.

The third heat exchanger 110 is provided with a second heat medium flow passage 111 through which the heat medium passing through the heat absorber 20 flows and a hot water flowing through the heat exchanging fluid with the heat medium flowing through the second heat medium flow passage 111 And a flow path 112 is provided. That is, the water passing through the hot water passage 112 is supplied to an external hot water consumer after the temperature thereof is raised by the heating medium.

The second heat medium flow path 111 may be connected to the heat absorbing portion 20 and the second heat medium circulation path 113. That is, the second heat medium circulation passage 113 may be connected to the heat absorbing portion inlet 20a and the heat absorbing portion outlet 20b. Therefore, the heat medium discharged from the heat absorber 20a can selectively flow through the first heat medium circulation passage 34 and the second heat medium circulation passage 113.

However, in this embodiment, the second heat medium flow path 111 is connected to the first heat medium circulation path 34 and the second heat medium circulation path 113. That is, a part of the first heat medium circulation flow path 34 can be commonly used to reduce the length of piping and to reduce the size of the entire system.

The second heat medium circulation flow path 113 includes a second heat medium inlet flow path 113a and a second heat medium outlet flow path 113b.

The second heating medium inlet flow path 113a is connected to the first heating medium inlet flow path 34a. Accordingly, the heat medium discharged from the heat absorber 20 flows through the first heat medium inlet flow path 34a while the remaining portion flows through the first heat medium inlet flow path 34a and the remainder flows into the second heat medium inlet flow path 113a .

The second heating medium outflow channel 113b is connected to the first heating medium outflow channel 34b. The heating medium having passed through the second heating medium passage 111 through the second heating medium inlet passage 113a flows into the first heating medium outlet passage 34b through the second heating medium outlet passage 113b, 20).

As a result, the heat medium absorbing heat in the heat absorbing section 20 can be radiated from the first heat medium passage 31 of the first heat exchanger 30 while circulating through the first heat medium circulation passage 34, Heat can be circulated through the second heat medium flow passage 111 of the third heat exchanger 110 through the second heat medium circulation flow path 113. [

In this embodiment, however, the heating medium flowing out from the heat absorber outlet 20b may be selectively supplied to any one of the first heat medium passage 31 and the second heat medium passage 111, Way valve (155) for flow to the < / RTI > Way valve 155 is installed at a position where the second heating medium inlet flow path 113a is connected to the middle portion of the first heating medium inlet flow path 34a.

Way valve 155 flows the heat medium flowing out of the heat absorber outlet 20b and flowing through the first heat medium inlet flow path 113a to the second heat medium inlet flow path 113a when there is an external hot water demand. Therefore, the heat medium is radiated while flowing through the second heat medium flow path 111, and the water flowing through the hot water flow path 112 absorbs the heat of the heat medium and the temperature rises.

The three-way valve 155 allows the heat medium flowing out of the heat absorber outlet 20b to flow through the first heat medium inlet flow path 34a as it is as the heat medium flowing through the first heat medium inlet flow path 34a, And flows into the first heat exchange passage (31). Accordingly, the heat medium is discharged from the first heat medium flow path 31, and the outdoor air blown by the blower 33 absorbs heat.

The cogeneration system of the present embodiment may further include a control unit (not shown) for controlling the three-way valve 155 as described above. As a result, the heat medium, which flows through the first heat medium inlet flow path 34a by absorbing heat while passing through the heat absorbing portion 20, is selectively supplied to the first heat medium passage 31 or the second heat medium inlet passage 113a The heat absorbed through the second heat medium flow path 111 is dissipated. Therefore, when there is an external hot water demand, it can be used to increase the temperature of the hot water to be supplied to the outside, thereby increasing the energy efficiency.

The hot water supply mechanism 120 serves to supply warm water whose temperature has been increased while flowing through the hot water passage 112 to the hot water demanding place. The hot water supply mechanism 120 includes a water circulation flow path 121, a pump 122, a hot water tank 123, and a water pipe 124.

Water is contained in the hot water tank 123, and the water circulating flow path 121 connects the hot water passage 112 and the hot water tank 123. The water circulation flow path 121 is provided with a pump 122 for circulating water. The water in the hot water tank 123 is circulated by the pump 122 through the water circulation flow path 121, the hot water flow path 112 and the hot water tank 123. The hot water tank (123) is connected to a water pipe (124) capable of supplying hot water to an external hot water requiring destination.

Hereinafter, the flow of the heating medium and the flow of the hot water in this embodiment will be described.

The heat medium absorbing heat in the heat absorbing part 20 flows out through the heat absorbing part outlet 20b and flows into the first heat medium inflowing flow path 34a and then into the three way valve 155. [ Here, the control unit (not shown) determines whether there is a hot water demand to the outside.

Way valve 155 directs the heat medium to the first heat medium flow path 34a of the first heat exchanger 30 and flows into the first heat medium flow path 34a as it is. And performs heat exchange with the outdoor air by the blower 33 in the first heat medium flow path 31. Flows out through the first heat medium flow path outlet portion 34b, and then enters the heat absorption portion inlet 20a again.

Way valve 155 directs the heating medium to the second heat medium flow passage 111 of the third heat exchanger 110. In this case, Specifically, the heat medium that has flowed through the first heat medium inlet flow path 34a is changed from the three-way valve 155 to the second heat medium flow path inlet portion 113a. And flows into the second heat medium flow passage 111 to perform heat exchange with water in the hot water flow passage 112. Flows out through the second heat medium flow passage outlet 113b, and then enters the heat absorption portion inlet 20a through the first heat medium outlet flow passage 34b.

On the other hand, the hot water is absorbed and flows into the hot water tank (123) through the water circulating flow path (121) while flowing through the hot water path (112). And then supplied to the external hot water supply source through the water pipe 124.

And other configurations and operations are the same as those of the first embodiment of the present invention, and therefore, the same reference numerals are used and a detailed description thereof will be omitted.

Third Embodiment

FIG. 4 is a configuration diagram illustrating the flow of a heating medium and a refrigerant of the cogeneration system according to the third embodiment of the present invention.

Referring to FIG. 4, the second heat exchanger 90 'of the present embodiment includes the above-described second refrigerant passage 91' and a water passage 92 'through which water passes. That is, in the first embodiment, the refrigerant and the room air exchange heat. In this embodiment, however, the refrigerant flowing through the second refrigerant passage 91 'and the water passing through the water passage 92' undergo heat exchange.

As described above, the second heat exchanger 90 'constitutes a part of the cooling cycle. Accordingly, the refrigerant passing through the second refrigerant passage 91 'of the second heat exchanger 90' undergoes heat exchange with water passing through the water passage 92 'according to the cooling / heating, thereby performing condensation / evaporation. Therefore, the water flowing through the water flow path 92 'absorbs the heat when the refrigerant condenses and becomes high temperature, and when the refrigerant evaporates, the heat dissipates and becomes low temperature.

The cogeneration system according to the present embodiment includes a coil unit 131 through which the water passed through the water channel 92 'flows, a water channel 92' and the coil unit 131, A water circulation passage 134 for circulating the unit 131 and the water passage 92 ', a water pump 133 for circulating water located in the water circulation passage 134, and a coil unit 134, And a blowing fan 132 for blowing air.

The air blowing fan 132 and the coil unit 131 may be located inside the case 130. The case 130 is located in a place where the user desires cooling / heating. That is, the case 130 corresponds to an indoor unit of a general air conditioner.

The flow of the refrigerant and the heat medium in this embodiment is the same as in the first embodiment. Hereinafter, the circulation of water in this embodiment will be described.

The refrigerant flows along the second refrigerant passage 91 'of the second heat exchanger 90' in accordance with the circulation of the cooling cycle described in the first embodiment and performs heat exchange with the water flowing in the water passage 92 ' Condensation / evaporation. And the water that exchanges heat with the refrigerant absorbs heat and becomes hot water or low temperature water. The water that has undergone the heat exchange flows into the water circulation flow path 134 by the water pump 133 and flows into the coil unit 131. The blowing fan 132 blows air to the coil unit 131 through which hot / cold water flows. Accordingly, water flowing through the coil unit absorbs or releases heat, and then flows into the water passage 92 'through the water circulation passage 134 to absorb or release heat. The air that has been heat-exchanged with water in the coil unit 131 to absorb or discharge heat is cooled / heated by the air blowing fan 132.

And other configurations and operations are the same as those of the first embodiment of the present invention, and therefore, the same reference numerals are used and a detailed description thereof will be omitted.

Fourth Embodiment

FIG. 5 is a configuration diagram illustrating a flow of a heating medium and a refrigerant of the cogeneration system according to the fourth embodiment of the present invention.

5, in this embodiment, the second heat exchanger 90 "is constituted by a storage tank for storing the heating medium. Therefore, unlike the third embodiment, the refrigerant flowing through the second refrigerant passage 91 ' Exchanges heat with the heat medium contained in the second heat exchanger 90 ", rather than performing heat exchange with the water flowing through the flow path 92 '. Therefore, the water circulation passage 134 " is directly connected to the second heat exchanger 90 "so that the heat medium contained in the second heat exchanger 90 " flows.

And other configurations and operations are the same as those of the third embodiment of the present invention, and therefore, the same reference numerals are used and a detailed description thereof will be omitted.

The scope of the present invention is not limited to the above-described embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a flow of a refrigerant and a heating medium during cooling of a cogeneration power generator according to a first embodiment of the present invention; FIG.

FIG. 2 is a view showing a flow of a refrigerant and a heating medium during heating of the cogeneration unit of the first embodiment; FIG.

FIG. 3 is a view showing a flow of a heating medium and a refrigerant of the cogeneration unit according to the second embodiment of the present invention; FIG.

FIG. 4 is a view illustrating a flow of a heating medium and a refrigerant of the cogeneration unit according to the third embodiment of the present invention; FIG.

FIG. 5 is a view showing a flow of a heating medium and a refrigerant of a cogeneration unit according to a fourth embodiment of the present invention. FIG.

Description of the Related Art

2: cabinet 4: generator

6: right panel 8: engine

20: Heat absorbing part 20a: Heat absorbing part entrance

20b: Heat absorber outlet 21: Engine heat absorber

23: Exhaust port heat absorbing part 30: First heat exchanger

31: first heating medium flow path 32: first refrigerant flow path

34: first heat medium circulation flow path 34a: first heat medium flow path

34b: first heating medium outflow channel 70: compressor

80: expansion mechanism 90: second heat exchanger

91: second refrigerant passage 100: four-way valve

110: third heat exchanger 111: second heat medium flow path

112: hot water passage 113: second heat medium circulation passage

113a: second heating medium inlet flow path 113b: second heating medium outlet flow path

155: Three-way valve 120:

130: Case 131: Coil unit

132: blower fan 134: water circulation channel

Claims (7)

A cabinet disposed outdoors; A generator disposed inside the cabinet and generating electric power; An engine disposed in the cabinet for driving the generator; A heat absorber disposed inside the cabinet and absorbing heat discharged from the engine and the generator while the heat medium flows; A compressor disposed inside the cabinet for compressing and discharging the refrigerant; A first heat medium flow path through which the heating medium flows and a first refrigerant flow path through which the refrigerant circulated by the compressor flows; a heat exchange unit for heat-exchanging heat between the first heat medium passage and the first refrigerant passage; A first heat exchanger; A second heat exchanger disposed in the room, the second heat exchanger being connected to the compressor and the first heat exchanger to constitute a heat pump cycle in which the refrigerant is circulated; And a first heat medium circulation passage for circulating the heat medium by connecting the heat absorbing portion and the first heat medium passage. The method according to claim 1, A third heat exchanger installed in the cabinet and having a second heat medium flow path through which the heating medium flows and a hot water flow path through which the hot water flows, the third heat exchanger exchanging heat between the second heat medium flow path and the hot water flow path; A second heat medium circulation flow path branched from the first heat medium circulation path and circulating the heat medium to the second heat medium flow path; And a hot water supply mechanism for circulating water to the hot water passage. The method of claim 2, A second heat medium circulation flow path disposed between the first heat medium circulation path and the second heat medium circulation path, And a three-way valve for allowing the heat medium, which has passed through the heat absorber, to flow to either the first heat medium circulation channel or the second heat medium circulation channel. The method according to claim 1, And an expansion tank connected to the first heat medium circulation passage and storing a vapor phase heat medium evaporated during the passage through the heat absorption portion. The method according to claim 1, The heat pump cycle A first expansion valve disposed inside the cabinet for expanding the refrigerant flowing into the first refrigerant passage of the first heat exchanger during heating operation; A first expansion valve disposed in the cabinet and connected in parallel to the first expansion valve to cool the refrigerant discharged from the first refrigerant passage of the first heat exchanger during the cooling operation to bypass the first expansion valve, Check valve; A second expansion valve disposed in the room for expanding a refrigerant flowing into the second heat exchanger during a cooling operation; And a second check valve disposed in the room and connected in parallel to the second expansion valve so that the refrigerant discharged from the second heat exchanger during the heating operation is bypassed instead of passing through the second expansion valve, system. A cabinet disposed outdoors; A generator disposed inside the cabinet and generating electric power; An engine disposed in the cabinet for driving the generator; A heat absorber disposed inside the cabinet and absorbing heat discharged from the engine and the generator while the heat medium flows; A compressor disposed inside the cabinet for compressing and discharging the refrigerant; A first heat medium flow path through which the heating medium flows and a first refrigerant flow path through which the refrigerant circulated by the compressor flows; a heat exchange unit for heat-exchanging heat between the first heat medium passage and the first refrigerant passage; A first heat exchanger; A second heat exchanger disposed in the room, the second heat exchanger being connected to the compressor and the first heat exchanger to constitute a heat pump cycle in which the refrigerant is circulated; A first heat medium circulation passage for circulating the heat medium by connecting the heat absorbing portion and the first heat medium passage; An expansion tank connected to the first heat medium circulation channel and storing a gaseous heat medium evaporated during the passage through the heat absorption unit; A first expansion valve disposed inside the cabinet for expanding the refrigerant flowing into the first refrigerant passage of the first heat exchanger during heating operation; A first expansion valve disposed in the cabinet and connected in parallel with the first expansion valve, wherein refrigerant discharged from the first refrigerant passage of the first heat exchanger during the cooling operation bypasses the first expansion valve, Check valve; A second expansion valve disposed in the room for expanding a refrigerant flowing into the second heat exchanger during a cooling operation; And a second check valve disposed in the room and connected in parallel to the second expansion valve so that the refrigerant discharged from the second heat exchanger during the heating operation is bypassed instead of passing through the second expansion valve, system. delete

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