KR101900272B1 - Gas Engine Driven Heat Pump Apparatus having Multiple Function of Air-Conditioning, Refrigeration and Freezing - Google Patents

Abstract

The present invention relates to a gas engine driving heat pump apparatus having a composite function of cooling and heating, refrigerating, and freezing, wherein an outdoor unit having a compressor driven by the gas engine and an outdoor heat exchanger and an indoor unit including a cooling and heating module, a refrigerating module, and a freezing module, connected in parallel with the outdoor unit, respectively, are formed as one freezing cycle so that a composite function of cooling and heating, refrigerating, and freezing can be performed by one freezing cycle. Moreover, power can be generated due to a thermo-element by using waste heat included in exhaust gas of the gas engine and cold air of a refrigerant so that the same can be supplied to driving power of loads such as a cooling fan or an electromagnetic valve.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gas engine driven heat pump apparatus having a combined function of cooling and heating,

The present invention relates to a gas engine drive heat pump apparatus having a combined function of cooling and heating, refrigeration and freezing, and more particularly, to an outdoor unit having a compressor and an outdoor heat exchanger driven by a gas engine, The indoor unit including the cooling / heating module, the refrigeration module, and the refrigeration module may be configured as one refrigeration cycle to realize a combined function of cooling and heating, refrigeration and freezing by a single refrigeration cycle, and the waste heat and the refrigerant contained in the exhaust gas of the gas engine To a gas engine driven heat pump apparatus having a combined function of cooling and heating, refrigeration and freezing, which can generate electric power by a thermoelectric element using cold heat and supply it to a driving power source such as a cooling fan or an electromagnetic valve.

Generally, a refrigeration cycle is a refrigerant cycle in which components including a compressor, a condenser, an expansion valve, and an evaporator are connected in a closed cycle, and the refrigerant circulating in the cycle is heat exchanged with ambient air during a phase change, Examples of devices using such a refrigeration cycle include an air conditioning system and a refrigeration / refrigeration system.

Among them, the air conditioning system is a device for cooling and heating the indoor space by heat exchange between the refrigerant circulating in the refrigeration cycle and the surrounding air. In the refrigeration / refrigeration system, the refrigerant circulating in the refrigeration cycle is heat- (Refrigeration or refrigeration) of foods stored in the storage compartment.

Conventionally, as described above, the air conditioning system and the refrigeration / refrigeration system are not only different from each other in usage and function, but also used in the summer or winter, while the refrigeration / refrigeration system is generally used in all seasons In general homes or offices, air conditioners (or heat pumps), which are air conditioning systems, and refrigerators (or freezers), which are refrigeration / freezing systems, were installed separately.

However, although the air conditioning system and the refrigeration / refrigeration system are mostly similar to the components of the cycle such as the compressor, the outdoor heat exchanger, the expansion valve, and the indoor heat exchanger, the installation cost, the installation area, This problem is further exacerbated for convenience stores, large supermarkets, and food retail stores where the heating / cooling and refrigeration / freezing are required in four seasons, and the heating / cooling part and the refrigeration load are larger than in general homes or offices.

Accordingly, in recent years, there has been developed a cooling / heating / refrigeration / refrigeration hybrid apparatus capable of reducing the installation cost and the maintenance cost by constituting the air conditioning system and the refrigeration / refrigeration system as one system. [Document 1] and the like.

However, even in the case of the apparatus described in the following [Reference 1] and the like, the air conditioning system and the refrigeration / refrigeration system are apparently constituted by only one system, and a refrigeration cycle for air conditioning and a refrigeration cycle for refrigeration are separately constructed internally There is a problem that it is difficult to obtain a substantial reduction effect on the installation cost and the maintenance cost.

In recent years, in order to reduce the maintenance cost of the air conditioning system, a gas engine driven heat pump (GHP) device using a compressor driven by power generated by a gas engine instead of an electric driven compressor The specific structure of the GHP is specifically disclosed in the following [Reference 2].

However, even in the case of the following [Document 2], the cost required for the operation of the air conditioning system can be reduced. In this case, however, a separate refrigeration system must still be installed for refrigeration / freezing, There is a problem that it can not be solved. Therefore, there is a need to develop a hybrid system device capable of coping with cooling / heating load and refrigeration / freezing load by one refrigeration cycle.

[Literature 1] Korean Patent No. 10-1639814 (issued on June 22, 2016)

[Patent Document 2] Korea Patent No. 10-0528128 (published on Nov. 15, 2005)

It is an object of the present invention to provide an outdoor unit having a compressor and an outdoor heat exchanger driven by a gas engine, an air conditioning module connected in parallel to the outdoor unit, a refrigeration module, The present invention provides a gas engine driven heat pump apparatus having a combined function of cooling and heating, refrigeration and freezing, which can realize a combined function of cooling and heating, refrigeration and freezing by constituting one indoor unit including a freezing module in one refrigeration cycle by a single refrigeration cycle will be.

Another object of the present invention is to provide a gas turbine engine that generates electric power by using a waste heat in the exhaust gas of a gas engine for driving the compressor and cold heat of the refrigerant and supplies the electric power to a driving power source such as a cooling fan or a solenoid valve The present invention relates to a gas engine driven heat pump apparatus having a combined function of cooling and heating, refrigeration and freezing.

In order to accomplish the above object, the present invention provides a gas engine driven heat pump apparatus having cooling, heating, refrigeration and freezing combined functions, which compresses a refrigerant with power generated from a gas engine and discharges the refrigerant through a refrigerant discharge pipe, A first refrigerant pipe connected to the refrigerant discharge pipe through the first refrigerant pipe and a second refrigerant pipe connected to the other side of the outdoor heat exchanger through the return pipe, A second expansion valve installed in the middle of the first refrigerant pipe branched from the second refrigerant guide pipe, and a second expansion valve installed in the middle of the second refrigerant pipe branched from the second refrigerant guide pipe, A refrigerant module including a valve and a second indoor heat exchanger, and a third indoor heat exchanger installed in the middle of the third refrigerant pipe branched from the second refrigerant guide pipe, Module and a refrigerant discharge pipe connected to the first refrigerant pipe and the first refrigerant pipe in the middle of the refrigerant discharge pipe to connect the refrigerant discharge pipe and the refrigerant return pipe to the first refrigerant pipe and the first refrigerant pipe during a cooling operation of the air- And a four-way valve connecting the refrigerant discharge pipe and the refrigerant return pipe to the first refrigerant pipe and the first refrigerant guide pipe, respectively, in a heating operation of the heating / cooling module, wherein the second refrigerant pipe is connected to the refrigerant recovery pipe, The third refrigerant pipe is connected to the middle of the second refrigerant pipe and the first booster module for increasing the pressure of the refrigerant is installed in the third refrigerant pipe between the connection portion of the third indoor heat exchanger and the second refrigerant pipe And a second booster module is installed in the second refrigerant pipe for increasing the pressure of the refrigerant between the connection part with the third refrigerant pipe and the connection part between the refrigerant return pipe and the second refrigerant pipe.

The refrigerant pipe branched from the first refrigerant pipe and connected to the first refrigerant guide pipe, the first refrigerant guide pipe, the second refrigerant pipe, the first refrigerant pipe, the second refrigerant pipe, the third refrigerant pipe, The first booster module, the second booster module, and the second booster module depending on whether the cooling / heating module, the refrigeration module, and the refrigeration module are operated, respectively, And a control unit for controlling the operation of the on-off valve, wherein the controller performs the heating operation of the air-conditioning module, and when at least one of the refrigeration module and the refrigeration module is operated, So that a part of the refrigerant discharged from the compressor and flowing through the first refrigerant pipe flows to the outdoor heat exchanger.

The apparatus may further include a thermoelectric generator for generating electricity by the thermoelectric element using the temperature difference between the cold heat of the refrigerant flowing through the refrigerant return pipe and the waste heat of the exhaust gas discharged from the gas engine, A first coolant recovery pipe for guiding the coolant to the thermoelectric generator and a second coolant recovery pipe for guiding the coolant discharged from the thermoelectric generator toward the compressor, A first cooling plate disposed on an upper surface of the hot tube, a second cooling plate disposed on a lower surface of the hot tube, at least one hot tube through which the flue gas of the hot tube flows, And a second thermoelectric element interposed between the high temperature tube and the second cooling plate, wherein the first refrigerant recovery tube is disposed inside the first cooling plate and the second cooling plate, Is to be introduced, characterized in that the second coolant return line of a cooling channel formed in which the refrigerant flow discharged through.

An accumulator installed in the middle of the second refrigerant recovery pipe; a liquid refrigerant withdrawal pipe connecting the lower portion of the accumulator with the first refrigerant recovery pipe; a refrigerant withdrawal valve installed in the middle of the liquid refrigerant withdrawal pipe; The refrigerant withdrawal pump installed in the middle of the pipe and the water level sensor unit sensing the level of the liquid refrigerant in the accumulator, wherein the controller opens the refrigerant withdrawal valve when the liquid refrigerant level in the accumulator is equal to or higher than a preset level So that the liquid refrigerant flows into the cooling channel by driving the refrigerant withdrawing pump.

A gas engine driven heat pump apparatus having a combined function of cooling and heating, refrigeration and freezing according to the present invention includes an outdoor unit having a compressor and an outdoor heat exchanger, an indoor unit including an air conditioner module connected in parallel to the outdoor unit, Refrigerating and freezing can be realized by a single refrigeration cycle. Therefore, not only the installation cost, installation area and maintenance cost of the apparatus can be remarkably reduced, Since it is driven by a non-gas engine, the maintenance cost of the apparatus can be further reduced.

The gas engine driving heat pump apparatus according to the present invention is characterized in that the refrigerant having passed through the refrigeration module is cooled by the first heat exchanger The booster module and the second booster module that increases the pressure secondarily before the combined refrigerant is supplied to the compressor are installed to prevent the volume efficiency of the compressor from being lowered due to the low evaporation pressure, There is an advantage.

Also, the gas engine driving heat pump apparatus having the hybrid air-conditioning, refrigeration and freezing function according to the present invention generates electric power by the thermoelectric element using the waste heat in the exhaust gas of the gas engine driving the compressor and the cold heat of the refrigerant. So that it is possible to further reduce the maintenance cost of the apparatus by using the produced power as a driving power source for a load such as a cooling fan or an electromagnetic valve.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining the overall cycle configuration of a gas engine driven heat pump apparatus according to a first embodiment of the present invention;
Fig. 2 is a block diagram for explaining the operation of the gas engine drive heat pump apparatus shown in Fig. 1,
FIGS. 3A to 3F are diagrams for explaining the refrigerant circulation cycle for each operation mode of the gas engine drive heat pump apparatus shown in FIG. 1,
4 is a view for explaining the overall cycle configuration of the gas engine drive heat pump apparatus according to the second embodiment of the present invention,
5A to 5C are diagrams for explaining the configuration of the thermoelectric generator applied to the gas engine drive heat pump apparatus shown in FIG. 4,
6 is a view for explaining the overall cycle configuration of the gas engine drive heat pump apparatus according to the third embodiment of the present invention, and Fig.
7 is a block diagram for explaining an operation configuration of the gas engine drive heat pump apparatus shown in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1)

FIG. 1 is a view for explaining the overall cycle configuration of a gas engine drive heat pump apparatus according to the first embodiment of the present invention. FIG. 2 is a view for explaining the operation configuration of the gas engine drive heat pump apparatus shown in FIG. And FIGS. 3A to 3F are views for explaining the refrigerant circulation cycle for each operation mode of the gas engine drive heat pump apparatus shown in FIG. 1, respectively.

The gas engine driving heat pump apparatus (hereinafter, referred to as a 'gas engine driving heat pump apparatus') having the cooling / heating, refrigeration and freezing combination functions according to the present embodiment includes a compressor unit 20 and an outdoor heat exchanger unit 30 And an indoor unit 2 including a cooling / heating module 60, a refrigeration module 70, and a refrigeration module 80 connected in parallel to the outdoor unit 1 in a single refrigeration cycle .

The outdoor unit 1 includes a gas engine 10 for generating power using gas, a compressor unit 20 for compressing and discharging the refrigerant by the power generated from the gas engine, heat exchange between the outdoor air and the refrigerant, Temperature high-pressure refrigerant discharged from the compressor unit 20 in accordance with the operation mode of the gas engine drive heat pump apparatus is switched to the outdoor heat exchanger unit 30 or the indoor unit 2 And a four-way valve (40).

The gas engine 10 is an internal combustion engine that generates power by burning gaseous fuel such as LNG and LPG. The specific structure of the gas engine 10 is not only well known in detail in [2] Therefore, a detailed description will be omitted here.

However, the power generated by the gas engine 10 is transmitted to the compressor unit 20 by the power transmission unit 15, which is implemented by a pulley (not shown) and a belt (not shown).

The compressor unit 20 is a compression mechanism that sucks refrigerant of a low temperature and a low pressure by a suction stroke and a compression stroke and compresses the refrigerant into high temperature and high pressure refrigerant and discharges the compressed refrigerant. In this embodiment, And a compressor (21) and a second compressor (22).

Since the two compressors 21 and 22 are constructed so that the suction pipe and the discharge pipe are connected in parallel to jointly correspond to the cooling / heating load, the refrigerating load and the refrigerating load, respectively, Even when the compressor of the stand is broken, operation by the other compressor is possible, so that deterioration of the refrigerated food or the frozen food can be prevented.

The two compressors 21 and 22 suck the refrigerant through the refrigerant return pipe 58 connected to the indoor unit 2 and discharge the compressed refrigerant through the refrigerant discharge pipe 51 as described later .

In the middle of the refrigerant return pipe 58, an opening / closing valve 58a for interrupting the flow of the refrigerant and an accumulator 95 for separating the liquid refrigerant contained in the refrigerant flowing into the compressor unit 20, Are sequentially installed in series along the flow direction (i.e., the direction toward the compressor section).

The outdoor heat exchanger unit 30 may be composed of two heat exchangers, for example, a first outdoor heat exchanger 31 and a second outdoor heat exchanger 32. The outdoor heat exchanger unit 30 may include a heat exchanger And a cooling fan (not shown) so as to be smoothly performed.

One side of the first and second outdoor heat exchangers 31 and 32 is connected to the refrigerant discharge pipe 51 in parallel with the first refrigerant guide pipe 52, Is provided with an on-off valve 52a for interrupting the flow of the refrigerant.

The other side of the first and second outdoor heat exchangers 31 and 32 is connected to the second refrigerant guide pipe 53 in parallel to the indoor unit 2. The second refrigerant guide pipe 53, Closing valve 53a for interrupting the flow of the refrigerant supplied to the indoor unit 2 is provided in the middle of the indoor unit 2 side of the indoor unit 2.

A check valve 53c for guiding the refrigerant only in one direction of the direction of the indoor unit 2 between the open / close valve 53a and the outdoor heat exchanger unit 30, A fourth expansion valve 53d for expanding the refrigerant introduced from the indoor unit 2 is provided in parallel with each other.

The four-way valve 40 is installed in the middle of the refrigerant discharge pipe 51 to switch the flow direction of the refrigerant according to the operation mode of the gas engine drive heat pump device. Specifically, The refrigerant discharge pipe 51 and the refrigerant return pipe 58 are connected to the first refrigerant guide pipe 52 and the first refrigerant pipe 54 to be described later during the cooling operation of the air conditioner 60, The refrigerant discharge pipe 51 and the refrigerant return pipe 58 are respectively connected to the first refrigerant pipe 54 and the first refrigerant guide pipe 52 which will be described later.

The indoor unit 2 is connected to the other side of the outdoor heat exchanger unit 30 through a second refrigerant guide pipe 53. Specifically, the indoor unit 2 is connected to the first refrigerant pipe branching from the second refrigerant guide pipe 53, (60) including first expansion valves (61, 64) and first indoor heat exchangers (63, 66) installed in the middle of the second refrigerant guide pipe (54) A refrigeration module 70 including second expansion valves 71 and 73 and second indoor heat exchangers 72 and 74 provided in the middle of the refrigerant pipe 55, A refrigeration module (80) including third expansion valves (81, 83) and third indoor heat exchangers (82, 84) provided in the middle of the third refrigerant pipe (56) And a fan (not shown).

In the middle of the second refrigerant guide pipe 53, an opening / closing valve for interrupting the supply of the refrigerant, which is supplied to the indoor unit 2 through the opening / closing valve 53a, to the refrigeration module 70 and the refrigeration module 80, The first refrigerant pipe 54 is branched for example between the on-off valve 53a and the on-off valve 53b and is connected to the four-way valve 40b as described above, To the refrigerant discharge pipe (51) or the refrigerant return pipe (58).

In the middle of the first refrigerant pipe 54, the refrigerant supplied to the indoor unit 2 through the opening / closing valve 53a of the second refrigerant guide pipe 53 is supplied to the cooling / heating module 60 An on-off valve 54a is provided and an on-off valve 54b is provided between the cooling / heating module 60 and the four-way valve 40 to control the flow of the refrigerant.

In the middle of the first refrigerant pipe 54, a refrigerant pipe 57 branched from the cooling / heating module 60 and the opening / closing valve 54b and connected to the first refrigerant pipe 52 is installed. In the middle of the refrigerant branch pipe (57), an on-off valve (57a) for interrupting the flow of the refrigerant is provided.

The cooling / heating module 60 is installed behind the opening / closing valve 54a. In the present embodiment, for example, two cooling / heating devices are installed in parallel in the middle of the first refrigerant pipe 54, The first and second indoor expansion valves 61 and 64 and the first indoor heat exchangers 63 and 66 are connected in series.

In addition, bypass pipes 62 and 65 are connected in parallel before and after the first expansion valves 61 and 64, respectively. In the middle of the bypass pipes 62 and 65, a first indoor heat exchanger 63 Check valves 62a and 65a for guiding the refrigerant only in one direction in the direction of the opening and closing valve 54a are installed in the bypass pipes 62 and 65. The bypass pipes 62 and 65 are connected to the heating / The refrigerant discharged from the compressor unit 20 and supplied to the first indoor heat exchangers 63 and 66 flows through the first indoor heat exchanger 63 and the second indoor heat exchanger 63.

The second refrigerant pipe 55 is branched from the second refrigerant pipe 53 and connected to the refrigerant return pipe 58. Specifically, the second refrigerant pipe 55 is connected between the opening / closing valve 58a and the accumulator 95 .

In the middle of the second refrigerant pipe 55, for example, two refrigerating devices are installed in parallel, and each of the refrigerating devices includes a second expansion valve 71, 73 and a second indoor heat exchanger 72 , 74) are connected in series.

In the middle of the second refrigerant pipe (55), an opening / closing valve (55a) for interrupting the flow of the refrigerant between the connection portion with the refrigerant return pipe (58) and the second indoor heat exchangers (72, 74) Respectively.

The third refrigerant pipe 56 is branched from the second refrigerant pipe 53 and connected to the middle of the second refrigerant pipe 55. In the middle of the third refrigerant pipe 56, And the third expansion valves 81 and 83 and the third indoor heat exchangers 82 and 84 are connected in series with each other.

The first booster module 91 for increasing the pressure of the refrigerant is provided between the connecting portions of the third indoor heat exchangers 82 and 84 and the second refrigerant pipe 55 in the middle of the third refrigerant pipe 56, And a second booster module 93 for increasing the pressure of the refrigerant is provided between the connection portion to the third refrigerant pipe 56 and the opening / closing valve 55a, in the middle of the second refrigerant pipe 55 .

In addition, bypass pipes 92 and 94 are connected to the front and rear of the first booster module 91 and the second booster module 93, respectively. In the middle of the bypass pipes 92 and 94, Closing valves 92a and 94a for interrupting the operation of the engine.

The first booster module 91 and the second booster module 93 may be implemented using a booster compressor. The first booster module 91 is connected to the third indoor heat exchangers 82 and 84, The second booster module 93 is configured to increase the pressure of the refrigerant before it joins with the refrigerant of the second refrigerant pipe 55, Thereby performing a function of secondarily increasing the refrigerant pressure of the second refrigerant pipe (55).

By the multi-stage compression of the first booster module 91 and the second booster module 93, the gas engine driving heat pump device according to the present invention is operated by the second indoor heat exchangers 72, 74 and the third indoor heat exchanger The volume efficiency of the compressors 21 and 22 can be prevented from being lowered due to the low evaporation pressure of the evaporators 82 and 84, thereby improving the operation efficiency of the apparatus.

When the user inputs the operation mode, the operation condition, or the set temperature through the input unit 110, the controller 100 controls the gas engine driven heat pump apparatus according to the present invention, A cooling fan drive unit 150 for driving a cooling fan (not shown) installed in the indoor unit 2, and an outdoor fan unit 150 for driving the outdoor unit 1, And controls the operation of the valve driving unit 160 for driving the valve and the expansion valve.

For this purpose, it is preferable that the on-off valve, the four-way valve, and the expansion valve are constituted by electronic valves.

The controller 100 controls the temperature of the indoor unit 2 and the temperature of the indoor unit 2 using the temperature information sensed by the temperature sensor unit 120 installed in the outdoor heat exchanger unit 30 and the indoor unit 2, 130, and the like, the operation of each of the driving units 140, 150, and 160 is controlled according to an operation algorithm for each operation mode. Hereinafter, a specific operation of the entire cycle according to each operation mode will be described with reference to FIGS. 3A to 3F do.

In the cycle according to the present invention, the refrigerant module 70 and the freezing module 80 can be independently operated by providing an opening / closing valve at the inlet and the outlet of the third refrigerant pipe 56, However, in the present embodiment, the refrigeration module 70 and the refrigeration module 80 are limited to the case where they are operated in conjunction with each other for convenience of explanation.

- Cooling mode -

3A is a diagram for explaining a refrigerant circulation cycle for a cooling operation mode in which the cooling / heating module 60 performs cooling operation and the refrigeration module 70 and the refrigeration module 80 are not operated.

In this case, the four-way valve 40 connects the refrigerant discharge pipe 51 and the refrigerant return pipe 58 to the first refrigerant guide pipe 52 and the first refrigerant pipe 54, Closing valve 53b of the first refrigerant pipe 53 and the opening and closing valve 55a of the second refrigerant pipe 55 and the opening and closing valve 57a of the refrigerant branch 57 are opened and the remaining opening and closing valves are opened, Thereby forming a refrigerant circulation cycle.

- Heating operation mode -

3B is a diagram for explaining a refrigerant circulation cycle for the heating operation mode in which the cooling / heating module 60 performs heating operation and the refrigeration module 70 and the refrigeration module 80 are not operated.

In this case, the four-way valve 40 connects the refrigerant discharge pipe 51 and the refrigerant return pipe 58 to the first refrigerant pipe 54 and the first refrigerant pipe 52, Closing valve 53b of the first refrigerant pipe 53 and the opening and closing valve 55a of the second refrigerant pipe 55 and the opening and closing valve 57a of the refrigerant branch 57 are opened and the remaining opening and closing valves are opened, Thereby forming a refrigerant circulation cycle.

The high-temperature and high-pressure refrigerant discharged from the compressor unit 20 passes through the first indoor heat exchanger (63, 66) through the first refrigerant pipe (54) The refrigerant flows to the outdoor heat exchanger 30 through the guide pipe 53 and expands through the fourth expansion valve 53d in the process of passing through the second refrigerant guide pipe 53. [

- Refrigeration / freezing mode -

3C is a diagram for explaining a refrigerant circulation cycle for the refrigeration / refrigeration operation mode in which the cooling / heating module 60 is not operated but only the refrigeration module 70 and the refrigeration module 80 are operated.

In this case, the four-way valve 40 connects the refrigerant discharge pipe 51 and the refrigerant return pipe 58 to the first refrigerant guide pipe 52 and the first refrigerant pipe 54, Closing valves 54a and 54b of the refrigerant branch pipe 54 and the opening and closing valve 57a of the refrigerant branch pipe 57 and the opening and closing valve 57a of the refrigerant branch pipe 58 are opened, / Refrigerant circulation cycle for refrigeration.

In addition, as described above, multi-stage compression of the refrigerant by the first booster module 91 and the second booster module 93 is performed in order to prevent the volume efficiency of the compressors 21 and 22 due to the low evaporation pressure from being lowered.

- Cooling and refrigeration / freezing mode -

FIG. 3D is a diagram for explaining a refrigerant circulation cycle for the cooling and refrigeration / refrigeration operation modes in which the cooling / heating module 60 performs cooling operation and the refrigeration module 70 and the refrigeration module 80 operate together .

In this case, the four-way valve 40 connects the refrigerant discharge pipe 51 and the refrigerant return pipe 58 to the first refrigerant guide pipe 52 and the first refrigerant pipe 54, And the other on-off valves are opened to form the refrigerant circulation cycle for cooling and refrigeration / freezing as shown by the arrows.

In addition, as described above, multi-stage compression of the refrigerant by the first booster module 91 and the second booster module 93 is performed in order to prevent the volume efficiency of the compressors 21 and 22 due to the low evaporation pressure from being lowered.

- Heating and refrigeration / freezing operation mode (heating load <cooling load) -

3E is a view for explaining a refrigerant circulation cycle for the heating and refrigeration / refrigeration operation modes in which the cooling / heating module 60 performs heating operation and the refrigeration module 70 and the refrigeration module 80 operate together , And the cooling load is larger than the heating load.

In this case, the four-way valve 40 connects the refrigerant discharge pipe 51 and the refrigerant return pipe 58 to the first refrigerant pipe 54 and the first refrigerant pipe 52, Off valve 52a of the refrigerant return pipe 52 and the open / close valve 58a of the refrigerant return pipe 58 are closed, and the remaining open / close valves are opened to form a heating refrigerant circulation cycle as shown by an arrow.

At this time, the high-temperature and high-pressure refrigerant discharged from the compressor unit 20 undergoes heat exchange with a part of the first refrigerant pipe 54 from the outdoor heat exchanger unit 30 through the refrigerant distributor 57, And flows to the indoor unit 2 through the refrigerant guide pipe 53.

The remaining refrigerant passing through the first indoor heat exchanger (63, 66) through the first refrigerant pipe (54) joins the second refrigerant guide pipe (53) through the bypass pipe (62, 65) 2 refrigerant pipe (55) and the third refrigerant pipe (56).

In addition, as described above, multi-stage compression of the refrigerant by the first booster module 91 and the second booster module 93 is performed in order to prevent the volume efficiency of the compressors 21 and 22 due to the low evaporation pressure from being lowered.

- Heating and refrigeration / freezing operation mode (heating load = cooling load) -

3F is a diagram for explaining the refrigerant circulation cycle for the heating and refrigeration / refrigeration operation modes in which the cooling / heating module 60 performs heating operation and the refrigeration module 70 and the refrigeration module 80 operate together , And the heating load and the cooling load are almost the same.

In this case, the four-way valve 40 connects the refrigerant discharge pipe 51 and the refrigerant return pipe 58 to the first refrigerant pipe 54 and the first refrigerant pipe 52, Closing valve 58a of the refrigerant branch pipe 52 and the opening and closing valve 57a of the refrigerant branch pipe 57 and the opening and closing valve 58a of the refrigerant return pipe 58 are opened and the remaining opening and closing valves are opened, Thereby forming a circulation cycle.

At this time, the high-temperature, high-pressure refrigerant discharged from the compressor unit 20 passes through the first indoor heat exchanger (63, 66) and the bypass pipe (62, 65) through the first refrigerant pipe (54) The refrigerant flows into the pipe 55 and the third refrigerant pipe 56. In this case, heat exchange with the outdoor air is not performed in the outdoor heat exchanger unit 30. [

In addition, as described above, multi-stage compression of the refrigerant by the first booster module 91 and the second booster module 93 is performed in order to prevent the volume efficiency of the compressors 21 and 22 due to the low evaporation pressure from being lowered.

The gas engine driving heat pump apparatus having the hybrid air-conditioning, refrigeration and freezing function according to the present invention includes an outdoor unit having a compressor and an outdoor heat exchanger, a cooling / heating module connected in parallel to the outdoor unit, Since the indoor unit including the refrigeration module is constituted by one refrigeration cycle and the combined function of cooling and heating, refrigeration and freezing can be implemented by a single refrigeration cycle, installation cost, installation area and maintenance cost of the apparatus can be remarkably reduced Since the compressor is driven by a gas engine rather than electricity, the maintenance cost of the apparatus can be further reduced.

(Second Embodiment)

4 is a view for explaining the overall cycle configuration of the gas engine drive heat pump apparatus according to the second embodiment of the present invention, and Figs. 5A to 5C are diagrams for explaining the total cycle configuration of the gas engine drive heat pump apparatus according to the second embodiment of the present invention, Fig. 8 is a view for explaining a configuration of a power generation section.

Since the gas engine driven heat pump apparatus according to the present embodiment differs from the first embodiment only in the configuration of the refrigerant recovery pipes 58 and 59 and the thermoelectric generator 200, Are denoted by the same reference numerals and duplicate descriptions will be omitted.

The gas engine driven heat pump apparatus according to the present embodiment is provided with the cold heat of the refrigerant flowing through the refrigerant return pipes 58 and 59 and the cold heat of the refrigerant flowing through the refrigerant return pipes 58 and 59 And a thermoelectric generator (200) for generating electricity by means of the thermoelectric element using the temperature difference between the waste heat of the flue gas.

The refrigerant recovery pipes 58 and 59 may include a first refrigerant recovery pipe 58 for guiding refrigerant from the four-way valve 40 toward the thermoelectric generator 200, The accumulator 95 is installed in the middle of the second refrigerant return pipe 59. The second refrigerant return pipe 59 guides the refrigerant in the direction of the compressor 20.

The thermoelectric generator 200 includes at least one high temperature tube 210 in which exhaust gas of the high temperature gas engine 10 flows, a first cooling plate 210 disposed on the upper surface of the high temperature tube 210, A second cooling plate 250 disposed on the lower surface of the high temperature tube 210, a first thermoelectric element 220 interposed between the high temperature tube 210 and the first cooling plate 240, And a second thermoelectric element 230 interposed between the high temperature tube 210 and the second cooling plate 250.

At this time, the high-temperature tube 210 has a long channel shape in which a high-temperature fluid flows therein. In this embodiment, as described later, the first and second thermoelectric elements 220 and 230 are easily contacted with each other For example, a rectangular channel having a rectangular cross section.

The high-temperature fluid flowing in the high-temperature pipe 210 is an exhaust gas of the gas engine 10 supplied through the exhaust gas supply pipe 15. The high-temperature pipe 210 is a high- It is preferable that the outer surface is made of a metal material having excellent heat conductivity, and the outer surface is heat-treated except for the heat-exchanging surface (i.e., the contacting surface) with the first and second thermoelectric elements 220 and 230, .

In the present embodiment, five hot tubes 210a, 210b, 210c, 210d and 210e having the same shape are arranged in the width direction of the hot tube 210a, And arranged so as to be spaced apart from each other in parallel.

The first cooling plate 240 is disposed on the upper surface (or the upper surface) of the high temperature tube 210 to cool the low temperature side of the first thermoelectric element 220 And a temperature difference is generated between the high temperature side and the low temperature side so as to generate electricity.

The first cooling plate 240 is disposed at a lower temperature of the first thermoelectric element 220 disposed on the upper surface of the five hot tubes 210a, 210b, 210c, 210d, and 210e, (Upper surface of the first thermoelectric element in the case of this embodiment).

A cooling channel 242 through which the refrigerant flowing through the first refrigerant recovery pipe 58 and discharged through the second refrigerant recovery pipe 59 flows is formed in the first cooling plate 240 In this embodiment, the cooling plate 242 is formed in a U shape at the center of the first cooling plate 240.

The first cooling plate 240 having the above structure is connected to the first refrigerant return pipe 58 at the inlet side of the cooling channel 242 and the second refrigerant return pipe 59 at the outlet side of the cooling channel 242. [ So that the low temperature refrigerant flows through the cooling channel 242.

The cooling heat of the refrigerant flowing through the cooling channel 242 is transmitted to the low temperature side of the first thermoelectric element 220 through the first cooling plate 240. To this end, Is preferably made of a material such as a metal having excellent thermal conductivity and it is preferable that the other outer surface which is not in contact with the first thermoelectric element 220 is subjected to heat insulation treatment in order to prevent a decrease in cooling efficiency desirable.

The second cooling plate 250 is disposed on the lower side (or the lower surface) of the high-temperature tube 210 so that the low-temperature side of the second thermoelectric element 230 (that is, The lower surface of the second thermoelectric element 230 is cooled to generate a temperature difference between the high temperature side and the low temperature side of the second thermoelectric element 230 so as to generate electric power.

In this case, since the specific structure of the second cooling plate 250 is the same as that of the first cooling plate 240 described above, a duplicate description thereof will be omitted.

The first thermoelectric element 220 is interposed between the high temperature tube 210 and the first cooling plate 240. Specifically, the high temperature side (that is, the lower surface of the first thermoelectric element in this embodiment) (That is, the upper surface of the first thermoelectric element in this embodiment) is in contact with the lower surface of the first cooling plate 240. The lower surface of the first cooling plate 240 contacts the lower surface of the first cooling plate 240. [

The second thermoelectric element 230 is interposed between the high temperature tube 210 and the second cooling plate 250. Specifically, the high temperature side (that is, the upper surface of the second thermoelectric element in this embodiment) (That is, the lower surface of the second thermoelectric element in this embodiment) is in contact with the upper surface of the second cooling plate 250. The lower surface of the second cooling plate 250 is in contact with the lower surface of the hot tube 210,

The thermoelectric generator 200 configured as described above is configured to store power generated in the first thermoelectric element 220 and the second thermoelectric element 230 in a power storage module (not shown), and the power storage module ) Is used as a driving power source for a cooling fan (not shown), an on-off valve, a four-way valve, an expansion valve, and a booster module constituting the cycle, the gas engine driving heat pump apparatus according to the present invention further reduces the maintenance cost .

(Third Embodiment)

6 is a view for explaining the overall cycle configuration of the gas engine drive heat pump apparatus according to the third embodiment of the present invention, and Fig. 7 is a flowchart for explaining the operation configuration of the gas engine drive heat pump apparatus shown in Fig. FIG.

Since the gas engine drive heat pump apparatus according to the present embodiment differs from the second embodiment only in the configuration of the refrigerant recovery pipes 58 and 59, the same components are denoted by the same reference numerals And redundant description will be omitted.

The gas engine drive heat pump apparatus according to the present embodiment is provided with a liquid refrigerant take-out tube 98 (FIG. 1) for connecting the lower part of the accumulator 95 installed in the middle of the second coolant return line 59 to the first coolant return line 58 A refrigerant withdrawing valve 98a provided in the middle of the liquid refrigerant withdrawing pipe 98, a refrigerant withdrawing pump 99 installed in the middle of the liquid refrigerant withdrawing pipe 98, And a water level sensor 125 for sensing the water level.

When the level of the liquid refrigerant in the accumulator 95 detected by the water level sensor unit 125 is equal to or higher than a preset level, the controller 100 controls the valve driving unit 160 to open the refrigerant withdrawing valve 98a And the pump driving unit 170 is controlled to drive the refrigerant withdrawing pump 99 so that the liquid refrigerant in the accumulator 95 flows into the cooling channel 242.

The gas engine driven heat pump apparatus according to the present invention can reduce the temperature difference between the first cooling plate 240 and the second cooling plate 250 and the high temperature pipe 210 by the evaporation heat of the liquid refrigerant, The power generation amount of the thermoelectric generator 200 can be increased.

1: outdoor unit 2: indoor unit
10: gas engine 20:
30: outdoor heat exchanger unit 40: four-way valve
60: cooling / heating module 70: refrigeration module
80: refrigeration module 91: first booster module
93: Second booster module 95: Accumulator
100: controller 200: thermoelectric generator
210: high temperature tube 220: first thermoelectric element
230: second thermoelectric element 240: first cooling plate
242: cooling channel 250: second cooling plate

Claims (4)

A compressor unit for compressing the refrigerant with the power generated from the gas engine and discharging the refrigerant through the refrigerant discharge pipe and sucking the refrigerant through the refrigerant recovery pipe;
An outdoor heat exchanger part having one side connected to the refrigerant discharge pipe through a first refrigerant guide pipe;
A cooling / heating module connected to the other side of the outdoor heat exchanger through a second refrigerant guide pipe and including a first expansion valve and a first indoor heat exchanger installed in the middle of a first refrigerant pipe branched from the second refrigerant guide pipe; A refrigerant module including a second expansion valve and a second indoor heat exchanger installed in the middle of the second refrigerant pipe branched from the second refrigerant guide pipe, and a second refrigerant pipe installed in the middle of the third refrigerant pipe branched from the second refrigerant guide pipe An indoor heat exchanger unit including a refrigeration module including a third expansion valve and a third indoor heat exchanger;
And a refrigerant discharge pipe connected to the first refrigerant pipe and the first refrigerant pipe, the refrigerant discharge pipe being connected to the first refrigerant pipe and the first refrigerant pipe in a cooling operation of the cooling / heating module, A four-way valve connecting the pipe and the refrigerant recovery pipe to the first refrigerant pipe and the first refrigerant guide pipe, respectively;
A thermoelectric generator generating electricity by means of a thermoelectric element using a temperature difference between the cold heat of the refrigerant flowing through the refrigerant return pipe and the waste heat of the exhaust gas discharged from the gas engine; And
Further comprising a controller for controlling operation of the four-way valve depending on whether the cooling / heating module, the refrigeration module, and the refrigeration module are operated,
The refrigerant recovery pipe includes a first refrigerant recovery pipe for guiding the refrigerant to the thermoelectric power generation unit, a second refrigerant recovery pipe for guiding the refrigerant discharged from the thermoelectric generation unit toward the compression chamber, An accumulator installed therein, a liquid refrigerant take-out tube connecting the lower portion of the accumulator and the first refrigerant collecting pipe, a refrigerant take-out valve provided in the middle of the liquid refrigerant take-out tube, a refrigerant take- And a water level sensor unit for sensing the liquid refrigerant level in the accumulator,
Wherein the control unit opens the refrigerant withdrawal valve and drives the refrigerant withdrawal pump to guide the liquid refrigerant to the thermoelectric generator through the first refrigerant recovery pipe when the liquid refrigerant level in the accumulator is equal to or higher than a predetermined level A gas engine driven heat pump apparatus having a combined function of cooling and heating, refrigeration and freezing. The method according to claim 1,
A refrigerant distribution branch branched from the first refrigerant pipe and connected to the first refrigerant guide pipe;
Further comprising: an on-off valve installed in the refrigerant tube for controlling the flow of the refrigerant,
Wherein the control unit opens the open / close valve provided in the refrigerant distribution tube when the cooling / heating module performs the heating operation and at least one of the refrigeration module and the refrigeration module is operated, And a part of the refrigerant flowing into the outdoor heat exchanger is allowed to flow to the outdoor heat exchanger part. 3. The method according to claim 1 or 2,
The thermoelectric generator includes at least one high temperature tube in which exhaust gas of the high temperature gas engine flows, a first cooling plate disposed on an upper surface of the high temperature tube, a second cooling plate disposed on a lower surface of the high temperature tube, A first thermoelectric element interposed between the high temperature tube and the first cooling plate, and a second thermoelectric element interposed between the high temperature tube and the second cooling plate,
Wherein the first cooling plate and the second cooling plate each have a cooling channel through which the liquid refrigerant flowing through the first refrigerant recovery pipe and discharged through the second refrigerant recovery pipe flows, And a gas engine driven heat pump apparatus having a combined refrigeration function. 3. The method according to claim 1 or 2,
The second refrigerant pipe is connected to the refrigerant recovery pipe, the third refrigerant pipe is connected to the middle of the second refrigerant pipe,
A first booster module for increasing the pressure of the refrigerant is provided between the third refrigerant pipe and the connection part between the third indoor heat exchanger and the second refrigerant pipe, A second booster module for increasing the pressure of the refrigerant is provided between the connection part with the return pipe,
Wherein the control unit controls operation of the first booster module and the second booster module according to whether the cooling / heating module, the refrigeration module, and the refrigeration module are operated. Heat pump device.

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