JP2003114068A - Engine-driven air conditioning and heating device with generator function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine-driven air conditioning and heating device with a generator function assembled easily, requiring only a small setting space. SOLUTION: In the air conditioning and heating device, a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an expansion valve 4, and an indoor heat exchanger 5 are connected via refrigerant pipes 6 to form a refrigerant circuit, and the heating and cooling are performed by switching the four-way valve 2. The generator 8 is connected to interlock with a gas engine 7 and an electric motor 9 in the closed state is connected to interlock with the compressor 1 as the sole drive source. The generator 8 is connected to the electric motor 9 via a power output line 10 to drive the compressor 1 only with the power generated by the generator 8. The compressor 1, the four-way valve 2, the outdoor heat exchanger 3 and the expansion valve 4, and the refrigerant pipes 6 connecting them, the gas engine 7, the generator 8, and the electric motor 9 are disposed in a package, and first and second pipe connection parts 11, 12, and a power outlet part 15 connecting an outside load 14 to the power output line 10 are attached to the package body 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine-driven cooling / heating machine with a power generation function, which is configured to drive a generator with an engine such as a gas engine and perform cooling / heating with the generated power output.

[0002]

2. Description of the Related Art As a device of this kind, there is a conventional technique disclosed in Japanese Patent Laid-Open No.
There has been one disclosed in Japanese Patent Publication No. 1-132594.

According to this known example, a compressor, a heat source side outdoor heat exchanger, a use side indoor heat exchanger, an expansion valve and a four-way valve are connected through a refrigerant pipe to form a refrigerant circuit. Then, the electric motor is linked to the compressor, the engine and the compressor and the generator are linked mechanically via the clutch, and the compressor and the electric motor are linked mechanically via the clutch. In addition, the electric motor can be driven by the electric power generated by the generator.

Further, in order to cope with changes in air conditioning load,
In the low load state, only the engine and the generator are linked together.In the medium load state, only the engine and the compressor are linked together.In the high load state, only the engine and the compressor are linked together. The electric motor and the compressor are interlocked with each other while being switched to the ON state.

[0005]

However, in order to cope with changes in the air conditioning load, a structure in which the engine, the compressor and the generator are mechanically interlocked with each other via a clutch, and a switching mechanism for opening and closing the clutch. However, there is a drawback in that the structure is complicated and the assembly is troublesome.

In addition to the clutch moving space,
A space for an operating system is required for opening and closing the clutch, which results in a large installation space as a whole.

Further, since the compressor is interlockedly connected to the engine, they cannot be hermetically sealed as a whole, resulting in a mechanical shaft seal structure. When a non-azeotropic refrigerant or the like is used, the seal member is worn away. As a result, there is a drawback that the leakage of the refrigerant occurs, the air conditioning capacity is lowered, and the durability is lowered.

The present invention has been made in view of the above circumstances, and the invention according to claim 1 is an engine drive with a power generation function which is easy to assemble, requires a small installation space, and has high durability. It is an object of the present invention to provide an air conditioner, and an object of the invention according to claim 2 is to make the assembling easier and to reduce the installation space. The invention according to claim 3 is intended to enable air conditioning while operating the engine efficiently, and the invention according to claim 4 is the number of operating side heat exchangers when there are a plurality of heat exchangers. The purpose is to enable power generation without waste in accordance with changes in. Claim 5
The invention according to claim 6 aims at enabling air conditioning without wasteful power generation. Further, the invention according to claim 6 performs air conditioning without wasteful power generation and supplies electric power to an external load. The purpose is to be able to.

[0009]

In order to achieve the above-mentioned object, an engine-driven cooling / heating machine with a power generation function according to a first aspect of the present invention has a compressor, a heat source side heat exchanger, and a use side heat exchanger. A refrigerant circuit in which an expansion valve and a four-way valve are connected via a refrigerant pipe, an engine, a generator that is interlocked with the engine to generate electric power, and the compressor is hermetically interlocked as a sole drive source. And a sealed electric motor that also includes the compressor, and a power output line that is connected to the generator and connected to the electric motor, other than the utilization side heat exchanger of the refrigerant circuit. At least the compressor, the engine, the generator, and the electric motor among them are packaged, and the package body has a pipe connecting portion for connecting the utilization side heat exchanger and an external load connected to the power output line. Configure annexed a power extraction unit that.

Further, in order to achieve the above-mentioned object, the invention according to claim 2 is the engine-driven cooling and heating machine with a power generating function according to claim 1, wherein the heat source side heat exchanger of the refrigerant circuit and the expansion valve. And the four-way valve are packaged in the package body.

Further, in order to achieve the above-mentioned object, the invention according to claim 3 is the engine-driven air conditioner with a power generation function according to claim 1 or 2, wherein the heat exchange on the use side in the operating or connected state. The air-conditioning load sensor is configured to drive the engine at a constant rotational speed with the highest efficiency corresponding to the maximum capacity of the total air-conditioning load required by the air conditioner, and is provided with an air-conditioning load sensor for measuring changes in the air-conditioning load. The air-conditioning control unit that controls the rotation speed of the electric motor to obtain the required air-conditioning load based on the air-conditioning load measured in Power is supplied to an external device outside the package body.

In order to achieve the above-mentioned object, the invention according to claim 4 is the engine-driven cooling and heating machine with a power generation function according to claim 3, wherein a plurality of utilization side heat exchangers are provided. Yes, the required total air conditioning load is determined based on the number of operating side heat exchangers in operation and the sum of their maximum capacities.

In order to achieve the above-mentioned object, the invention according to claim 5 is, in the engine-driven air conditioner with a power generation function according to claim 1 or 2, an air conditioning load for measuring a change in air conditioning load. A sensor is provided, and engine control means for controlling the engine speed so as to drive the engine at the most efficient engine speed corresponding to the air conditioning load based on the air conditioning load measured by the air conditioning load sensor is provided. Configure.

In order to achieve the above-mentioned object, the invention according to claim 6 is the engine-driven air conditioner with a power generation function according to claim 1 or 2, wherein the air conditioning load and the required power load of external equipment are satisfied. A load sensor for measuring a change in the load sensor, and based on the required power load measured by the load sensor, the engine speed is set so as to drive the engine at the most efficient rotational speed corresponding to the required power load. An engine control means for controlling is provided and configured.

[0015]

According to the structure of the engine-driven air conditioner with a power generation function of the invention of claim 1, the compressor is driven only by the electric motor driven by the generated electric power obtained by driving the generator by the engine to perform the air conditioning. Moreover, the compressor and the electric motor can be hermetically sealed and interlocked with each other to prevent leakage of the refrigerant. In addition, the package main body is installed, the utilization side heat exchanger is connected to the pipe connection part via the refrigerant pipe, and the external load is connected to the power extraction part via the power line to assemble the air conditioner / heater. .

Further, according to the structure of the engine-driven air conditioner with a power generation function of the invention of claim 2, the heat source side heat exchanger is simply connected to the pipe side connecting portion through the refrigerant pipe. A refrigerant circuit can be constructed by connecting the expansion valve and the four-way valve.

According to the structure of the engine-driven air conditioner with a power generation function of the invention of claim 3, the maximum capacity of the total air conditioning load required by the heat exchanger on the utilization side in the operating or connected state can be satisfied, that is, In a state where electric power required for air conditioning is reliably generated, the engine can be driven at a constant rotational speed with the highest efficiency, and the remaining electric power consumed for air conditioning can be supplied to external equipment outside the package body.

Further, according to the structure of the engine-driven air conditioner with a power generation function of the invention according to claim 4, there is a plurality of use side heat exchangers, and only a part of them is operated. Accordingly, the required total air conditioning load is determined based on the number of operating side heat exchangers in operation and the sum of their maximum capacities.

Further, according to the structure of the engine-driven air conditioner with a power generation function of the invention according to the fifth aspect, the engine control means is most efficient for each of the air conditioning loads measured by the air conditioning load sensor according to the change of the air conditioning load. The engine can be driven at a high rotation speed to obtain the generated electric power required for those air conditioning loads.

Further, according to the structure of the engine-driven air conditioner with a power generation function of the invention according to claim 6, the engine control means changes the air conditioning load and the demanded power load of the external device according to the change of the air conditioning load and the air conditioning load at that time. Drive the engine at the rotation speed that is the most efficient with the required power load of external equipment,
It is possible to obtain the generated power required for the air conditioning load and the required power load of the external device.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a first embodiment of an engine-driven air conditioner with a power generation function according to the present invention, which includes a compressor 1, a four-way valve 2, and an outdoor heat exchanger 3 as a heat source side heat exchanger. The expansion valve 4 and the indoor heat exchanger 5 as a use side heat exchanger are connected in that order via a refrigerant pipe 6 to form a refrigerant circuit.

By switching the four-way valve 2, the cooling operation in which the refrigerant flows in the order of compressor 1-> four-way valve 2-> outdoor heat exchanger 3-> expansion valve 4-> indoor heat exchanger 5-> four-way valve 2-> compressor 1 State (state of solid line in the figure) and compressor 1 → four-way valve 2 → indoor heat exchanger 5 → expansion valve 4 → outdoor heat exchanger 3 → four-way valve 2 →
Heating operation state in which compressor 1 is flowed in order (state shown by broken line in the figure)
It is configured to be able to perform heating and cooling by switching to and.

A generator 8 is interlockingly connected to a gas engine 7 as an engine, an electric motor 9 is interlockingly connected to the compressor 1 as a sole drive source, and the electric motor 9 is also connected.
Is hermetically sealed including the compressor 1, and the generator 8 is connected to the electric motor 9 via the power output line 10.
The compressor 1 is driven only by the electric power generated by the generator 8 by driving the gas engine 7.

The refrigerant pipe 6 connecting the expansion valve 4 and the indoor heat exchanger 5 can be separated into the expansion valve side pipe 6a and the indoor heat exchanger side pipe 6b through the first pipe connecting portion 11. It is configured. In addition, the refrigerant pipe 6 connecting the indoor heat exchanger 5 and the four-way valve 2 is separable into the indoor heat exchanger side pipe 6c and the four-way valve side pipe 6d via the second pipe connecting portion 12. Has been done.

Compressor 1 among the members constituting the refrigerant circuit
A four-way valve 2, an outdoor heat exchanger 3, an expansion valve 4, a refrigerant pipe 6 connecting them, an expansion valve side pipe 6a and a four-way valve side pipe 6d, a gas engine 7, a generator 8 and an electric motor. 9 and 9 are packaged, and in the package body 13,
The 1st and 2nd piping connection parts 11 and 12 and the electric power extraction part 15 which connects the external load 14 to the electric power output line 10 are attached.

Although not shown, the package body 13 is connected to the power output line 10a that is branched and connected to the power output line 10.
A motor (not shown) for driving the fan 3a of the outdoor heat exchanger 3, a motor (not shown) for the engine cooling pump, and a solenoid (not shown) for switching the four-way valve 2 packaged inside An electric device such as a solenoid (not shown) for adjusting the expansion valve 4 and a controller (not shown) is connected thereto.

A motor (not shown) for driving the fan 5a of the indoor heat exchanger 5 is connected to a power take-out line 10b connected to the power take-out portion 15, though not shown.
It is configured such that the power generated by the generator 8 is supplied.

The package body 13 includes a gas engine 7
A third pipe connecting portion 17 for connecting the fuel supply pipe 16a for supplying the fuel gas to the gas engine side fuel supply pipe 16b
Is attached.

Further, the package body 13 has a gas engine side exhaust gas pipe 18a discharged from the gas engine 7.
A fourth pipe connecting portion 19 for connecting the exhaust gas pipe 18b is attached to the exhaust gas pipe 18b, and the exhaust gas pipe 18b is connected to a hot water supply heat exchanger (not shown), a hot water storage tank, or the like to effectively use the exhaust heat from the gas engine 7. It is supposed to do.

In this embodiment, a heat radiating fin is provided on the outer peripheral surface of the exhaust gas pipe 18a on the gas engine side, and a heat radiating fan for blowing air to the heat radiating fin and discharging hot air to the outside of the package body 13 is provided in the package body 13. It may be configured so that heat can be dissipated when the exhaust heat from the gas engine 7 is unnecessary.

As shown in the graph of change in output with time in FIG. 2 and the graph of correlation between output, engine speed and efficiency in FIG. 3, fluctuations in air conditioning load required by the indoor heat exchanger 5 are shown. Considering the air-conditioning output H1 consumed in connection with the above, based on the maximum air-conditioning output HM corresponding to the maximum capacity of the total air-conditioning load required by the indoor heat exchanger 5, for example, the output may be 3 kW. For example, if the engine speed is about 1600 rpm (efficiency is about 27%), and if it is 5 kW, the engine speed is about 2600 rpm (efficiency is about 28%). Is configured to derive a high rotational speed and drive the gas engine 7 at the derived constant rotational speed to generate electric power.

As shown in the block diagram of FIG. 4, in the room where the indoor heat exchanger 5 is provided, a room temperature sensor 2 for measuring room temperature as an air conditioning load sensor for measuring changes in air conditioning load.
0 is provided. A room temperature sensor 20 and a temperature setter 21 for setting a target temperature as a required air conditioning load are connected to a controller 22 as air conditioning control means, and the controller 22 is connected to a motor voltage controller 23 of the electric motor 9. The controller 22 is provided with a comparison means 24 and a motor voltage calculation means 25.

In the comparison means 24, the room temperature measured by the room temperature sensor 20 and the target temperature set by the temperature setting device 21 are compared and calculated, and the temperature difference and the temperature difference with respect to the target temperature are calculated and output. ing. In the motor voltage calculation means 25, based on the temperature difference from the comparison means 24, the number of rotations of the electric motor 9 required to control to the target temperature, that is, the electric motor based on the temperature difference and the temperature difference from the target temperature. The motor voltage applied to 9 is calculated, and the applied signal of the calculated motor voltage is output to the motor voltage control unit 23.

In the motor voltage control section 23, the motor voltage is controlled in response to the applied signal from the motor voltage calculation means 25, the rotation speed of the electric motor 9 is controlled, the compressor 1 is controlled, and desired air conditioning is performed. It is configured to do. In the case of cooling, the rotation speed of the electric motor 9 is increased when the measured room temperature becomes higher than the target temperature, while the rotation speed of the electric motor 9 is decreased when the measured room temperature becomes lower than the target temperature. To control. The opposite is true for heating.

As a result of performing such air conditioning control, as shown in FIG. 2, the air conditioning output H1 consumed in accordance with the variation of the air conditioning load required in the indoor heat exchanger 5 fluctuates. As a result, the surplus output (electric power) HW corresponding to the amount of electric power generated by the generator 8 excluding the amount of electric power required for the required air conditioning load also fluctuates, but the entire amount is supplied to the external device 14. . Although not shown, if the excess power HW cannot cover the load required by the external device 14, it will be covered by the grid-connected commercial power.

The controller 22 is also the package body 1
The room temperature sensor 20 and the temperature setter 21 are packaged in the package 3 and are connected to a wiring connection portion (not shown) through wiring.

Although the room temperature sensor 20 is used as the air conditioning load sensor in the above embodiment, a sensor for measuring the temperature of the air blown out from the indoor heat exchanger 5, or
You may use the sensor etc. which measure the temperature of the suction air to the indoor heat exchanger 5.

FIG. 5 is a schematic configuration diagram showing a second embodiment of an engine-driven air conditioner with a power generation function according to the present invention,
The difference from the first embodiment is as follows. That is, three indoor heat exchangers 5 are connected to the first and second pipe connecting portions 11 and 12 via the pipes 6b and 6c, respectively.

The motor 31 for driving the fan 5a of the indoor heat exchanger 5 has a power line 3 having an operation switch 32 interposed therein.
A power extraction line 10 b connected to the power extraction unit 15 is connected via the line 3.

The fuel supply pipe 16a is provided with an electromagnetically operated fuel gas adjusting valve 34 for adjusting the supply amount of fuel gas. A controller 35 is connected to each operation switch 32, and a fuel gas regulating valve 34 is connected to the controller 35. The controller 35 has an output calculation means 36.
A rotation speed calculation means 37 and a valve opening degree calculation means 38 are provided.

In the output calculation means 36, the operation switch 32
Of the indoor heat exchangers 5 in the ON state, that is, the number of indoor heat exchangers 5 in the operating state and the sum of their maximum capacities, to determine the required total air conditioning load, and calculate the required output. It is supposed to do.

In the rotational speed calculating means 37, from the graph of the correlation between the output, the engine speed and the efficiency shown in FIG. 3, the output obtained by the output calculating means 36 is the most efficient, as in the case of the first embodiment. Is designed to derive a high engine speed.

The valve opening degree calculating means 38 calculates the opening degree of the fuel gas adjusting valve 34 necessary to obtain the engine speed based on the engine speed derived by the engine speed calculating means 37, and opens it. The control signal necessary for obtaining the degree is output to the fuel gas regulating valve 34.

With the above configuration, it is possible to determine the required total air conditioning load in accordance with the change in the number of indoor heat exchangers 5 in operation and to operate at the most efficient engine speed. As shown in the graph of changes in engine speed over time in FIG. 6, in the room on the south side, for example, one unit is driven because it gets hot from an early time in the middle period of spring and the like, and operation is absent during the daytime. The engine speed is the most efficient according to the number of operating vehicles as the operating status changes, such as stopping, restarting operation of one vehicle after returning home, and then all returning home and starting operation in each room sequentially. Will be driven in. In the second embodiment as well, the entire amount of surplus power, which is the amount of power generated by the generator 8 excluding the amount of power required for the required air conditioning load, is supplied to the external device 14.

FIG. 7 is a schematic configuration diagram showing a third embodiment of an engine-driven air conditioner with a power generation function according to the present invention,
The difference from the first embodiment is as follows. That is, the power supply line 42 of the commercial power supply 41 is connected to the power extraction line 10a connected to the external device 14 to be grid-connected, and the power supply line 42 is connected to the external device 14 from the commercial power supply 41 supplied to the external device 14. A load sensor 43 that measures changes in the air conditioning load and the required power load of the external device 14 based on the electric power of To the load sensor 43, the air conditioning load measured based on the room temperature sensor 20 described in the first embodiment is input, the air conditioning load is added, and the power from the commercial power supply 41 is zero, It is configured to substantially measure the air conditioning load and the required power load F of the external device 14.

In the third embodiment, the output HM for air conditioning corresponding to the maximum capacity of the total air conditioning load required by the indoor heat exchanger 5 as shown in the graph of the change in output with time of FIG. The generator 8 is configured to be capable of generating power.

The fuel supply pipe 16a is provided with an electromagnetically operated fuel gas adjusting valve 44 for adjusting the supply amount of fuel gas. As shown in the block diagram of the control system of FIG. 9, the load sensor 43 is connected to a controller 45 as an engine control means, and a fuel gas adjusting valve 44 is connected to the controller 45.

The controller 45 includes a rotation speed calculating means 46 for calculating the most efficient engine speed corresponding to the air conditioning load and the required power load of the external equipment 14, and a valve for calculating the opening of the fuel gas adjusting valve 44. An opening degree calculation means 47 is provided.

From the graph of the correlation between the output, the engine speed, and the efficiency shown in FIG. 3, the rotation speed calculating means 46 shows that the most effective efficiency corresponding to the air conditioning load measured by the load sensor 43 and the required power load of the external equipment 14 is obtained. It is designed to derive a high engine speed.

The valve opening degree calculating means 47 calculates the opening degree of the fuel gas adjusting valve 44 necessary to obtain the engine speed based on the engine speed derived by the engine speed calculating means 46, and the opening degree. Is output to the fuel gas regulating valve 44.

With the above configuration, as shown in FIG. 8, when the required power load of the indoor heat exchanger 5 and the external equipment 14 fluctuates, the following control is performed.

As the load sensor 43 measures the air conditioning load and the required power load F of the external equipment 14, the gas engine 7 is driven at the most efficient engine speed corresponding to the output of the required power load F, Power is generated by the generator 8.

When the required power load F exceeds the maximum generated power amount HM obtained by the power generation of the generator 8, the generated power amount H is increased because the power generation capacity of the generator 8 has reached the upper limit. Since the power cannot be provided and the power becomes insufficient, the power for the shortage is covered by the commercial power from the commercial power supply 41.

According to the third embodiment, as the required power load F decreases due to, for example, being turned off at night or turning off the TV, the engine speed is controlled to control the required power load F. It is possible to generate an amount of electric power H commensurate with the above, and to eliminate wasteful power generation.

In the third embodiment, as the air conditioning load, the air conditioning load measured based on the room temperature sensor 20 is input to the load sensor 43. However, it is set by the temperature setter 21 which is the required air conditioning load. The target temperature may be measured and the target temperature may be input to the load sensor 43 as an air conditioning load.

In the above embodiment, among the members constituting the refrigerant circuit, the compressor 1, the four-way valve 2, the outdoor heat exchanger 3 and the expansion valve 4 are packaged. For example, the outdoor heat exchanger 3 May be provided outside the package body 13. In short, at least the compressor 1 is provided as the invention according to claim 1.
It should be packaged as.

In the third embodiment described above, the engine control means 45 controls the rotation speed of the gas engine 7 based on the air conditioning load and the required power load of external equipment. The number of revolutions of the gas engine 7 may be controlled so that the engine is driven at the most efficient revolution corresponding to the air conditioning load (claim 5).

In the present invention, a floor heater may be used in place of the indoor heat exchanger 5 or in addition to the indoor heat exchanger 5, and they are collectively referred to as a utilization side heat exchanger. .

Further, the present invention is not limited to the gas engine 2 as described above, but a gasoline engine, a diesel engine or the like can be applied.

[0060]

As is apparent from the above description, according to the engine-driven air conditioner with a power generation function of the invention of claim 1, the electric motor driven by the generated electric power obtained by driving the generator with the engine is used. Since only the compressor is driven to perform air conditioning, the conventional configuration in which the engine and the compressor are interlockingly connected, the configuration in which the compressor is interlockingly connected and the generator is interlockingly connected, and It is not necessary to use either the configuration in which the engine is linked to the compressor or the state in which the electric motor is linked to the compressor.
It is not necessary to secure a space for each constituent member and an operation space necessary for switching, so that the size can be reduced and the installation space can be reduced. Moreover, since the compressor, the electric motor, and the entire interlocking connection structure of both are hermetically sealed, even if a non-azeotropic refrigerant is used, the leakage of the refrigerant can be prevented and the durability can be improved. In addition, package the package, connect the usage side heat exchanger to the pipe connection part of the package body via the refrigerant pipe, and connect the external load to the power extraction part via the power line to assemble the air conditioner Therefore, as a whole, it is possible to provide an engine-driven air conditioner with a power generation function that is easy to assemble, requires a small installation space, and has high durability.

Further, according to the engine-driven air conditioner with a power generation function of the invention of claim 2, since the heat source side heat exchanger of the refrigerant circuit, the expansion valve and the four-way valve are also packaged, the refrigerant pipe is connected to the pipe connection portion. Since the air conditioner can be assembled by simply connecting the heat exchanger on the use side via the, the space for each heat exchanger on the heat source side, the expansion valve, and the four-way valve is secured outside the package body, and they are connected by piping. Compared to when
Assembly is easier and the installation space can be made smaller.

Further, according to the engine-driven air conditioner with a power generation function of the invention according to claim 3, the maximum capacity of the total air conditioning load required in the operating or connected state heat exchanger on the utilization side is met, that is, the air conditioning. In order to reliably generate the electric power required for air conditioning, the engine is driven at a constant rotational speed, which is the most efficient, to perform air conditioning, and the remaining power consumed for air conditioning is supplied to external equipment outside the package body. It is possible to operate the engine by selecting a good rotation speed, and to perform air conditioning while operating the engine efficiently and consume generated power without waste. Further, for example, when the engine and the compressor are interlockedly connected and the rotation speed of the compressor, that is, the rotation speed of the engine is adjusted according to the air conditioning load, the generated power itself of the generator fluctuates accordingly. However, according to the engine-driven air conditioner with a power generation function of the invention according to the third aspect, the generated power can be maintained constant, and a large amount of power can be supplied to the external device.

According to the engine-driven air conditioner with a power generation function of the invention according to claim 4, there are a plurality of utilization side heat exchangers, and only a part of them is operated, depending on the operating condition. , The required total air conditioning load is determined based on the number of operating heat exchangers on the operating side and the sum of their maximum capacities. Thus, compared with the case where the engine is driven at a constant rotation speed, which has the highest efficiency and corresponds to the maximum capacity of the total air conditioning load required by the heat exchanger on the use side, power can be generated without waste according to the change in the number of operating units. .

Further, according to the engine-driven air conditioner with a power generation function of the invention of claim 5, the engine is operated at the rotation speed with the highest efficiency for each of the air conditioning loads measured by the air conditioning load sensor according to the change of the air conditioning load. Since it is driven, the minimum amount of electric power required for air conditioning can be generated, and air conditioning can be performed without wasteful power generation.

When the engine is operated at a constant rotation speed to generate electric power, the generated electric power becomes excessive when the electric power required for the air conditioner or the external equipment is small, such as at night, and the electric power is sold to the grid or the electric power is consumed. Although another measure such as radiating heat with a heater to store heat is required, the engine-driven cooling / heating machine with a power generation function according to the invention of claim 6 responds to changes in the air conditioning load and the required power load of external equipment. The engine speed is controlled to obtain the generated power required for those loads, so air conditioning can be performed without wasteful power generation.
It is economical because there is no need for another measure due to excessive power generation.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of an engine-driven air conditioner with a power generation function according to the present invention.

FIG. 2 is a graph showing changes in output with time.

FIG. 3 is a graph showing a correlation between output, engine speed, and efficiency.

FIG. 4 is a block diagram showing a control system.

FIG. 5 is a schematic configuration diagram showing a second embodiment of an engine-driven air conditioner with a power generation function according to the present invention.

FIG. 6 is a graph showing changes in engine speed with time.

FIG. 7 is a schematic configuration diagram showing a third embodiment of an engine-driven air conditioner with a power generation function according to the present invention.

FIG. 8 is a graph showing changes in output with time.

FIG. 9 is a block diagram showing a control system.

[Explanation of symbols]

1 ... Compressor Two-way valve 3 ... Outdoor heat exchanger as heat source side heat exchanger 4 ... Expansion valve 5: Indoor side heat exchanger as a use side heat exchanger 6 ... Refrigerant piping 7 ... Gas engine 8 ... Generator 9 ... Electric motor 10 ... Power output line 11 ... First piping connection 12 ... Second pipe connection 13 ... Package body 14 ... External load 15 ... Electric power take-out section 20 ... Room temperature sensor as air conditioning load sensor 22 ... Controller as air conditioning control means 43 ... Load sensor 45 ... Controller as engine control means

Continued front page    (72) Inventor Toshinari Sakai             4-1-2 Hirano-cho, Chuo-ku, Osaka City, Osaka             Gas Co., Ltd. F term (reference) 3L060 AA03 AA08 CC19 DD02 EE02

Claims (6)

[Claims] 1. A refrigerant circuit in which a compressor, a heat source side heat exchanger, a utilization side heat exchanger, an expansion valve and a four-way valve are connected through a refrigerant pipe, an engine, and an engine, which is interlocked and connected to generate power. A generator to perform, an electric motor that is hermetically linked to the compressor in a hermetically sealed state as a sole drive source, and that is hermetically sealed to include the compressor, and is connected to the generator and is connected to the electric motor. A power output line, and package at least the compressor, the engine, the generator, and the electric motor other than the use side heat exchanger of the refrigerant circuit, and the use side heat in the package body. An engine-driven air conditioner with a power generation function, characterized in that a pipe connecting portion for connecting an exchanger and a power extracting portion for connecting an external load to the power output line are additionally provided. 2. The engine-driven air conditioner with a power generation function according to claim 1, wherein the heat source side heat exchanger of the refrigerant circuit, the expansion valve and the four-way valve are packaged in a package body. . 3. The engine-driven cooling / heating machine with a power generation function according to claim 1 or 2, wherein the highest efficiency constant corresponding to the maximum capacity of the total air-conditioning load required by the operating side or connected state side heat exchanger. An electric motor configured to drive the engine at the number of revolutions and provided with an air conditioning load sensor for measuring changes in the air conditioning load so that the required air conditioning load can be obtained based on the air conditioning load measured by the air conditioning load sensor. An air-conditioning control unit that controls the number of revolutions of the generator is provided, and power is generated by removing the amount of power required for the required air-conditioning load from the amount of power generated by the generator, and is configured to supply power to external equipment outside the package body. Engine driven air conditioner with functions. 4. The engine-driven air conditioner with a power generation function according to claim 3, comprising a plurality of heat exchangers on the use side, and determining the required total air conditioning load on the use side in the operating state. An engine-driven air conditioner with a power generation function that is performed based on the number of heat exchangers and the sum of their maximum capacities. 5. The engine-driven air conditioner with a power generation function according to claim 1, further comprising an air conditioning load sensor for measuring a change in air conditioning load, and the air conditioning load sensor measures the air conditioning load based on the air conditioning load measured by the air conditioning load sensor. An engine-driven air conditioner with a power generation function, which is provided with engine control means for controlling the engine speed so as to drive the engine at the most efficient engine speed corresponding to an air conditioning load. 6. The engine-driven cooling / heating machine with a power generation function according to claim 1, further comprising a load sensor for measuring changes in an air conditioning load and a required power load of an external device, and the required power measured by the load sensor. An engine-driven cooling / heating machine with a power generation function, which is provided with engine control means for controlling the engine speed so as to drive the engine at the most efficient engine speed corresponding to the required power load, based on the load.