JPH11316062A - Outdoor machine unit and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure a capability adjustment in response to variations of fresh air temperature and an indoor load. SOLUTION: A refrigerant circuit is constructed which includes an outdoor heat exchanger 31, a compressor 33 driven by a gas engine 41, and a water heat exchanger 32 for performing heat exchange between engine cooling water supplied for cooling of the gas engine 41 and a refrigerant. The water heat exchanger 32 is provided striding a parallel circuit portion 30a provided to go around the outdoor heat exchanger 31 and a cooling water system 50 through which engine cooling water is circulated. Hereby, there can be properly adjusted a refrigerant amount for performing heat exchange with the outdoor heat exchanger 31 and a refrigerant amount for performing heat exchange with the water heat exchanger 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas heat pump type air conditioner in which a compressor is driven by a gas engine and exhaust gas of the gas engine is used as a heating source of a liquid refrigerant during a heating operation. .

[0002]

2. Description of the Related Art An air conditioner that performs cooling and heating using a heat pump includes a refrigerant circuit including elements such as an indoor heat exchanger, a compressor, an outdoor heat exchanger, and an expansion valve. Cooling and heating of the room is realized by exchanging heat in the indoor heat exchanger and the outdoor heat exchanger while the refrigerant passes through this circuit. Further, the refrigerant circuit may be provided with a refrigerant heater for directly heating the refrigerant itself, instead of relying solely on receiving the heat of the refrigerant by the outdoor heat exchanger (during the heating operation). .

In recent years, as a power source for a compressor in the above-described refrigerant circuit, a type using a gas engine instead of a commonly used electric motor has been developed. An air conditioner using this gas engine is generally called a gas heat pump type air conditioner (hereinafter abbreviated as GHP). According to this GHP, a relatively inexpensive gas can be used as fuel, so that the running cost does not increase as in an air conditioner (hereinafter abbreviated as EHP) equipped with a compressor using an electric motor. Costs can be reduced.

Further, in the GHP, for example, during heating operation, if the heat of the high-temperature exhaust gas discharged from the gas engine is used as a heating source for the refrigerant, it is possible to obtain an excellent heating effect, Use efficiency can be improved. By the way, the heating capacity at the time of low outside air temperature is about 1.2 to 1.5 times higher than the EHP. Also,
By introducing such a mechanism, in the refrigerant circuit,
It is not necessary to specially install equipment such as the above-described refrigerant heater.

[0005] In addition, in the GHP, the so-called defrosting operation of the outdoor heat exchanger required for the heating operation is also performed.
It can be carried out using the exhaust heat of the engine. Generally, in the defrost operation in the EHP, the heating operation is stopped, the cooling operation is temporarily performed, and the outdoor heat exchanger is defrosted. In this case, since the cool air is blown into the room, the comfort of the room environment is impaired. In the GHP, the continuous heating operation becomes possible due to the above-described circumstances, and there is no occurrence of a problem that is a concern in the EHP.

[0006]

This GHP is, as shown in FIG. 6, a cooling water system 1 for cooling a gas engine.
And a water heat exchanger 5 for heating the refrigerant disposed between the outdoor heat exchanger 3 and the four-way valve 4 so as to straddle both the cooling water system 1 and the refrigerant circuit 2. This has the advantage that it is possible to improve the heating capacity by allowing the refrigerant to recover heat from the warmed cooling water by performing heat exchange between the cooling water and the exhaust gas.

However, as described above, the outdoor heat exchanger 3
The configuration in which the water heat exchanger 5 and the water heat exchanger 5 are arranged in series has the following disadvantages. That is, if the outside air temperature decreases during the heating operation, the outdoor heat exchanger 3 cannot sufficiently recover heat from the outside air, or in extreme cases, radiates heat to the outside air and recovers heat with the water heat exchanger 5. Even in such a case, a desired heating capacity cannot be exhibited in some cases.

On the contrary, when the outdoor temperature is not so low or the indoor load is low, the outdoor heat exchanger 3
Although sufficient heat recovery can be performed by the above, heat is also recovered by the water heat exchanger 5, so that an overload operation may occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to adjust a capacity according to a change in an outside temperature or an indoor load.

[0010]

The present invention employs the following means in order to solve the above-mentioned problems. That is, the outdoor unit according to claim 1 includes an outdoor heat exchanger that performs heat exchange between the refrigerant and the outside air; a compressor that is driven by a gas engine to discharge a high-temperature and high-pressure gas refrigerant; A water heat exchanger that performs heat exchange between the engine coolant and the refrigerant provided for cooling the engine, and a refrigerant amount and the water heat exchanger that perform heat exchange with the outdoor heat exchanger. And an adjusting mechanism for adjusting at least one of the amounts of the refrigerant that causes heat exchange between the two.

In this outdoor unit, for example, when the outside air temperature is high or the indoor load is low during the heating operation, the refrigerant causes the refrigerant to exchange heat only with the outdoor heat exchanger.
When the outside air temperature is low or the indoor load is high, heat exchange is performed at an appropriate rate between both the outdoor heat exchanger and the water heat exchanger. When the temperature is extremely high, by exchanging heat only with the water heat exchanger, more heat can be recovered, so that the capacity can be adjusted according to changes in outside temperature and indoor load. .

An air conditioner according to a second aspect of the present invention is an outdoor heat exchanger for exchanging heat between a refrigerant and outside air, a compressor driven by a gas engine to discharge a high-temperature and high-pressure gas refrigerant, A water heat exchanger for performing heat exchange between the engine cooling water and the refrigerant used for cooling the gas engine, a refrigerant amount for performing heat exchange between the outdoor heat exchanger, and the water heat exchanger An outdoor unit comprising an adjusting mechanism for adjusting at least one of the amounts of the refrigerant that exchanges heat with the fan, a fan that sucks air from the room and blows out the air from the outlet, and supplies the air from the outdoor unit. An indoor unit that includes an indoor heat exchanger that causes heat to be exchanged between the supplied refrigerant and air drawn in by the fan.

[0013] In this air conditioner, even if the amount of heat recovered from the outside air by the outdoor heat exchanger becomes too small or too small due to the fluctuation of the outside air temperature or the indoor load during the heating operation, the outdoor heat exchanger or the water heat exchanger can be used. Since it is possible to cause the refrigerant to perform heat exchange with either one of the refrigerants or to perform heat exchange with the refrigerant at an appropriate ratio, the capacity can be adjusted according to the fluctuation.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The GHP (gas heat pump type air conditioner) shown in FIG. 1 includes an indoor unit 10 and an outdoor unit 20. During the cooling operation, the indoor unit 10 evaporates and evaporates the low-temperature and low-pressure liquid refrigerant to remove heat from indoor air,
During the heating operation, a high-temperature and high-pressure gas refrigerant is condensed and liquefied to warm the indoor air, and an indoor air is drawn through the indoor heat exchanger 11 to exchange heat with the refrigerant and then blow out from the outlet. And a fan 12 for causing the air to flow.

The outdoor unit 20 includes a refrigerant circuit portion 30 inside which a refrigerant circuit is further formed, and a gas engine 4.
The gas engine unit 40 mainly includes a gas engine unit 40 and has components attached thereto.

The refrigerant circuit 30 includes an outdoor heat exchanger 31, a water heat exchanger 32, a compressor 33, an accumulator 34, a four-way valve 35, an oil separator 36, an expansion valve 37, and a three-way valve 3.
8 and a sensor 39, and a parallel circuit portion 30a branched from the three-way valve 38 and placed in parallel with the outdoor heat exchanger 31 between the four-way valve 35 and the expansion valve 37.

The outdoor heat exchanger 31 condenses and liquefies the high-temperature and high-pressure gas refrigerant during cooling operation and radiates heat to outdoor air, and conversely evaporates the low-temperature and low-pressure liquid refrigerant during heating operation to remove heat from outdoor air. Take away. In other words, the outdoor heat exchanger 31 performs the opposite operation of the indoor heat exchanger 11 during each of the cooling and heating operations.

The water heat exchanger 32 is for recovering heat from the engine cooling water used for cooling the gas engine 41 into a refrigerant, and is provided on the side of the parallel circuit section 30a.
Thus, during the heating operation, the refrigerant can not only rely on heat exchange in the outdoor heat exchanger 31 but also recover heat from the cooling water, and the effect of the heating operation can be enhanced.

The compressor 33 compresses the gas refrigerant sucked from either the indoor heat exchanger 11 or the outdoor heat exchanger 31 and discharges it as a high-temperature and high-pressure gas refrigerant. Thus, during cooling, even if the outside air temperature is high, the refrigerant can radiate heat to the outdoor air through the outdoor heat exchanger 31, and during heating, it is possible to apply heat to the indoor air through the indoor heat exchanger 11.

The accumulator 34 is provided for storing a liquid component contained in the gas refrigerant flowing into the compressor 33. The four-way valve 35 is provided for selectively sending out the high-temperature and high-pressure gas refrigerant compressed in the compressor 33 to either the indoor heat exchanger 11 or the outdoor heat exchanger 31.

The oil separator 36 separates oil contained in the refrigerant. Further, the expansion valve 37 is for decompressing and expanding the high-temperature and high-pressure liquid refrigerant sent from the outdoor heat exchanger 31 during the cooling operation to make it a low-temperature and low-pressure liquid refrigerant.

The sensor 39 is for detecting the degree of superheating of the gas refrigerant sucked into the compressor 33. The control unit C is adapted to control the three-way valve 38 based on a signal from the sensor 39.
To adjust the amount of refrigerant flowing through the outdoor heat exchanger 31 and the amount of refrigerant flowing through the water heat exchanger 32 according to the degree of superheat of the refrigerant. Note that, among the components described above, the parallel circuit unit 30a, the three-way valve 38, the sensor 39, and the control unit C constitute an adjustment mechanism in the present embodiment.

On the other hand, in the gas engine section 40, a cooling water system 50, an exhaust gas system 60,
Four systems, a fuel intake system 70 and an engine oil system 80, are provided. The gas engine 41 is connected to a compressor 33 installed in the refrigerant system 30 by a shaft or a belt or the like.
Power is transmitted to the vehicle.

The cooling water system 50 includes a water pump 51, a reservoir tank 52, and a radiator 53. The cooling water system 50 is a system for cooling the gas engine 41 with cooling water passing through a circuit constituted by these components. The water pump 51 is a gas engine 4
It is provided to circulate one cooling water through the circuit.
The reservoir tank 52 is used to temporarily store an excess of the cooling water flowing through the circuit, or to supply the cooling water when the circuit runs short of the cooling water. The radiator 53 is integrally formed with the outdoor heat exchanger 31 and is provided to release heat taken from the gas engine 41 by the cooling water to the outside air.

The cooling water system 50 is provided with an exhaust gas heat exchanger 54 in addition to the above configuration. This is provided to recover the heat of the exhaust gas into the cooling water. In the cooling water system 50, the water heat exchanger 32 described above is disposed so as to straddle both the cooling system 30 and the cooling water system 50. From these, during heating operation,
The cooling water not only removes heat from the gas engine 41 but also recovers heat from exhaust gas, and the recovered heat is given to the refrigerant from the cooling water through the water heat exchanger 32.

The exhaust gas system 60 includes a muffler 61, an exhaust top 62, and a drain filter 63.
This is a system for guiding exhaust gas discharged from the outside to the outside.
The muffler 61 is provided to absorb noise caused when the gas engine 41 discharges exhaust gas. The exhaust top 62 separates moisture contained in the exhaust gas,
This is provided so as not to be scattered to the external environment. From the viewpoint of this function, the exhaust top 62 is sometimes called an exhaust separator. The drain filter 63 is provided for temporarily storing the water separated from the exhaust top 62 just described. Further, a neutralizing agent is provided inside the drain filter 63. This corresponds to the fact that the moisture contained in the exhaust gas is generally strongly acidic, and is provided for the purpose of neutralizing this acidic moisture to render it harmless.

The fuel intake system 70 includes a gas regulator 7
1, solenoid valve 72, intake box 73, air cleaner 74
And a system for supplying fuel and air to the gas engine 41. The gas regulator 71 is provided for adjusting the delivery pressure of gas supplied from outside the outdoor unit 20 via the electromagnetic valve 72. On the other hand, the intake box 73 is provided to take in air from outside the outdoor unit 20. In addition, the intake box 73
Also has a function of preventing the noise generated at the time of intake. The air cleaner 74 is provided for removing dust from the air thus sucked. As described above, the gas and air supplied from the outside are respectively shown in FIG.
As shown in the figure, the gas regulator 71 and the air cleaner 7
After passing through No. 4, they are mixed and sent to the gas engine 41 to be used as fuel.

The engine oil system 80 has an oil sub-tank 81 and is provided for supplying lubricating oil to the gas engine 41. An oil pan 41 a is provided below the gas engine 41 to receive the oil in the oil sub tank 81.

The outdoor unit 20 of the configuration described above
2 and 3 are housed in an outdoor unit housing 21 as shown in FIGS. As shown in these figures, the interior of the outdoor unit housing 21 is
The upper and lower parts are divided into two by two. These upper and lower spaces are now called the heat exchange room 23 and the machine room 24, respectively.
I will call it. In FIGS. 2 and 3, the illustration of the piping described with reference to FIG. 1 is omitted.

The heat exchange chamber 23 is provided with an outdoor heat exchanger 31 and a radiator 53 so as to cover all the front and back surfaces of the outdoor unit housing 21. The outdoor heat exchanger 31 and the radiator 53 have an integrated structure as described above. The heat exchange chamber 23 includes a muffler 61, an exhaust top 62, an intake box 73, and the like among the elements shown in FIG. Incidentally, the muffler 61 and the exhaust top 62 shown in FIG.
Is not shown in FIG.

In the heat exchange chamber 23, in addition to the components described above, a fan 91, a fan motor 92, and a fan fixture 9
3 are provided. The fan 91 is attached to an output shaft of a fan motor 92 attached to a fan attachment 93 suspended from a ceiling surface of the outdoor unit housing 21. In the present embodiment, two sets of the fans 91 are mounted. Openings 94 are formed in the ceiling surface of the outdoor unit housing 21 so as to correspond to the mounting positions of the fans 91.
The opening 94 is provided with a mesh cover 95. The fan 91 assists the operation of the outdoor heat exchanger 31.

In the heat exchange chamber 23, two ventilation boxes 96 are provided on the partition plate 22, and a ventilation fan 97 is provided inside each of them. The ventilation box 96 and the ventilation fan 97 are provided to guide heat inside the machine room 24 to the heat exchange room 23. Therefore, the air heated in the machine room 24 is supplied to the ventilation fan 9.
6. The air is discharged to the outside of the outdoor unit housing 21 through the path of the heat exchange chamber 23 and the fan 91. Note that the intake box 73 is placed above the ventilation boxes 96. The air taken from the intake box 73 is
Gas engine 4 through the space between both ventilation boxes 96
1 to reach.

Next, the machine room 24 will be described.
Most of the components described in FIG. 1 and the components of each system are accommodated in the machine room 24. 2 and 3, the compressor 33, the accumulator 34, the four-way valve 35, and the oil separator 36 in the refrigerant circuit unit 30 and the gas engine 41, the drain filter 63, and the air cleaner 74 in the gas engine unit 40 are shown. Are shown respectively.

In the machine room 24, a drain pipe 101 is provided in addition to the above components. The drain pipe 101 is a pipe that connects the opening 22 a provided in the partition plate 22 and the floor opening 25 of the outdoor unit housing 21.
This is achieved by the outdoor unit housing 2 through the ceiling opening 94 described above.
1 is provided to drain rainwater that has entered inside 1 to the outside of the outdoor unit housing 21.

In the machine room 24, a base plate 102,
An anti-vibration rubber 103 is provided. The base plate 102 is a substantially square plate, and is used as a floor on which the components in the refrigerant circuit unit 30 and the gas engine unit 40 housed in the machine room 24 are mounted. This base plate 10
At the four corners of the lower surface 2, anti-vibration rubber 103 is arranged. Accordingly, the base plate 102 and the vibration isolating rubber 103 have a function of suppressing mechanical vibration generated from the refrigerant circuit unit 30 and the gas engine unit 40 placed above the base plate 102 and the vibration isolating rubber 103.

The operation of the GHP having the above-described configuration during the operation of each of the indoor cooling and the heating will be described. First, during the cooling operation, the refrigerant circuit unit 3
The zero-way four-way valve 35 is in a state where the compressor 33 and the outdoor heat exchanger 31 are connected to each other, and the indoor heat exchanger 11 and the accumulator 34 are connected to each other. In this state, the high-temperature and high-pressure gas refrigerant discharged from the compressor 33 is sent to the outdoor heat exchanger 31.

The high-temperature and high-pressure gas refrigerant is condensed and liquefied in the outdoor heat exchanger 31, and radiates heat to outdoor air to become a high-temperature and high-pressure liquid refrigerant. Further, the high-temperature and high-pressure liquid refrigerant is reduced in pressure in the process of passing through the expansion valve 37, becomes a low-temperature and low-pressure liquid refrigerant, and is sent to the indoor unit 10.

The low-temperature and low-pressure liquid refrigerant sent to the indoor unit 10 is evaporated and vaporized in the indoor heat exchanger 11, cools by removing heat from the indoor air, and then becomes a low-temperature and low-pressure gas refrigerant. It is sent to the refrigerant circuit unit 30 inside.

The low-temperature and low-pressure gas refrigerant sent to the refrigerant circuit section 30 flows into the accumulator 34 through the four-way valve 35,
After the liquid component is separated, it is sucked into the compressor 33. The gas refrigerant sucked into the compressor 33 is compressed by the operation of the compressor 33, becomes a high-temperature and high-pressure gas refrigerant, and is sent to the outdoor heat exchanger 31 again.

On the other hand, during the heating operation, the four-way valve 35
Is in a state where the compressor 33 and the indoor heat exchanger 11 are connected, and the outdoor heat exchanger 31 and the accumulator 34 are connected. In this state, the high-temperature and high-pressure gas refrigerant discharged from the compressor 33 is supplied to the indoor heat exchanger 1 of the indoor unit 10.
Sent to 1.

The high-temperature and high-pressure gas refrigerant is condensed and liquefied in the indoor heat exchanger 11, radiates heat to indoor air and is heated, and then becomes a high-temperature and high-pressure liquid refrigerant and is sent to the refrigerant circuit unit 30 in the outdoor unit 20. Can be The high-temperature and high-pressure liquid refrigerant sent to the refrigerant circuit unit 30 flows into the outdoor heat exchanger 31. In the outdoor heat exchanger 31, the high-temperature and high-pressure liquid refrigerant takes heat from the outside air and evaporates to become a low-temperature and low-pressure gas refrigerant.

The high-temperature and high-pressure gas refrigerant is condensed and liquefied in the indoor heat exchanger 11, radiates heat to indoor air and is heated, and then is converted to a high-temperature and high-pressure liquid refrigerant and sent to the refrigerant circuit unit 30 in the outdoor unit 20. Can be In the refrigerant circuit section 30, the sensor 3
9 monitors the degree of superheat of the refrigerant on the suction side of the compressor 33, and the three-way valve 38 opens based on a command from the control unit C so that the degree of superheat of the refrigerant approaches a target value (for example, 5 ° C.). Adjustments have been made.

For example, if the degree of superheat of the refrigerant is smaller than the target value, that is, if the refrigerant cannot recover a sufficient amount of heat to achieve the required heating capacity, the water heat exchanger 32
The parallel circuit unit 30 a
The degree of opening of the three-way valve 38 is adjusted so as to increase the amount of the refrigerant to be sent to the air conditioner. Conversely, when the degree of superheat is larger than the target value, the amount of the refrigerant to be sent to the parallel circuit portion 30a is reduced so that the overload operation is not performed. The opening degree of the three-way valve 38 is adjusted so as to decrease the opening degree.

Thus, the high-temperature and high-pressure liquid refrigerant sent from the indoor heat exchanger 11 depends on the degree of opening of the three-way valve 38.
It flows into one or both of the outdoor heat exchanger 31 and the water heat exchanger 21. Then, in the outdoor heat exchanger 31, the high-temperature and high-pressure liquid refrigerant takes heat from the outside air and evaporates to become a low-temperature and low-pressure gas refrigerant.
In No. 2, heat exchange is performed with the engine cooling water to become a high-temperature and high-pressure gas refrigerant.

The gas refrigerant flows into an accumulator 34 where liquid components are separated.
Inhaled. The gas refrigerant sucked into the compressor 33 is compressed, becomes high-temperature and high-pressure gas refrigerant, and is sent to the indoor heat exchanger 11 again.

As described above, the GHP of this embodiment
In this case, even if the outside air temperature or the indoor load fluctuates during the heating operation and the amount of heat recovered from the outside air in the outdoor heat exchanger 31 becomes excessive or insufficient, the three-way valve 3 according to the refrigerant superheat degree on the suction side of the compressor 33 is used.
By adjusting the opening degree of 8, the amount of heat recovered from the engine cooling water in the water heat exchanger 32 can be increased or decreased according to the excess or deficiency. be able to. Therefore, it is possible to prevent a decrease in the heating feeling at the time of a low outside temperature and also to prevent an overload operation at the time of a high outside temperature.

Next, regarding a second embodiment of the present invention,
This will be described with reference to FIG. FIG. 4 is a refrigerant circuit diagram showing a main part of the GHP according to the present embodiment. In the figure, reference numeral 110 denotes a two-way valve, 111 denotes a sensor for detecting an outside air temperature,
Reference numeral 12 denotes a control unit for adjusting the opening of the two-way valve 110. The other elements have the same functions as those shown in FIGS. .

The GHP of this embodiment is an outdoor heat exchanger 31
And the water heat exchanger 32 have the same configuration as the first embodiment in that they are provided in a parallel state.
A two-way valve 1 on the four-way valve 35 side of the water heat exchanger 32
10 is provided, and this two-way valve 110 is opened and closed by the outside air temperature.

That is, in this embodiment, the parallel circuit unit 3
0a, two-way valve 110, sensor 111 and control unit 112
Constitutes an adjustment mechanism, and when the outside air temperature detected by the sensor 111 is equal to or lower than a certain temperature (for example, 7 ° C.), the control unit 112 issues an opening command to the two-way valve 110, The valve 110 is opened. When the outside air temperature exceeds 7 ° C., the two-way valve 110 is closed.

As described above, the GHP of the present embodiment
By adjusting the opening of the two-way valve 110 according to the change in the outside air temperature, the amount of heat to be recovered from the engine cooling water to the refrigerant by the water heat exchanger 32 can be appropriately increased or decreased.
It is possible to perform a capability adjustment with a high followability to the fluctuation.

Next, regarding a third embodiment of the present invention,
This will be described with reference to FIG. FIG. 5 is a refrigerant circuit diagram showing a main part of the GHP according to the present embodiment. In the drawing, reference numerals 120, 121, 122 denote two-way valves, 123 denotes a sensor,
Reference numeral 24 denotes a control unit for adjusting the opening of the two-way valves 120, 121, 122, and reference numerals 125, 126 denote bypass circuit units. The other elements have the same functions as the elements shown in FIGS.

The GHP of this embodiment is an outdoor heat exchanger 31
The configuration differs from the above-described embodiments in that the and the water heat exchanger 32 are provided in series. That is, the water heat exchanger 32 is provided between the outdoor heat exchanger 33 and the four-way valve 35. Furthermore, the GHP of the present embodiment includes bypass circuits 125, 126 through which the refrigerant sent from the indoor heat exchanger 11 during the heating operation is bypassed without flowing through the heat exchangers 32, 33. ing.

The two-way valves 120, 121, 122, the sensor 123, the control unit 124, and the bypass circuit 125,
Reference numeral 126 denotes an adjustment mechanism according to the present embodiment,
These two-way valves 120, 121, 122
The opening degree is adjusted based on a command issued from the control unit 124 in response to a signal from the control unit 124. As the sensor 123, a sensor that detects the degree of superheat of the refrigerant on the compressor suction side as in the first embodiment or that detects the outside air temperature as in the second embodiment is employed.

In the present embodiment, for example, when the outside air temperature is high (referred to as case 1 for convenience), the outdoor unit 31 can sufficiently recover heat, and the water heat exchanger 32 can recover heat. Since it is unnecessary, the two-way valve 120 is opened and the two-way valve 121 is closed to allow the refrigerant to flow through the outdoor heat exchanger 31, while the two-way valve 122 is closed and the water heat exchanger 32 is bypassed. Let it.

Further, when the outside air temperature is low (case 2), the outdoor unit 31 cannot perform sufficient heat recovery and requires the water heat exchanger 32 to recover heat. In the same manner as in the above case, the two-way valve 120 is opened and the two-way valve 121 is closed to flow through the outdoor heat exchanger 31, and the two-way valve 122 is also opened and the water heat exchanger 3 is opened.
Heat to be recovered is replenished by circulating a refrigerant through 2.

Further, when the outside air temperature is extremely low (for example, about -2
(0 ° C.), the outdoor unit 31 cannot not only sufficiently recover heat, but also may release heat to the outside air. Will be needed. Therefore, contrary to the case 1, the two-way valve 120 is closed and the two-way valve 121 is opened to prevent the refrigerant from flowing to the outdoor heat exchanger 31 in the same manner as the case 2, Open the two-way valve 122 to open the water heat exchanger 3
The refrigerant is allowed to circulate through only 2 to recover heat.

As described above, the GHP of this embodiment
Then, the two-way valve 120,
By adjusting the degree of opening of 121 and 122, the refrigerant can flow through only the outdoor heat exchanger 31 or only the water heat exchanger 32, or can flow through both of the heat exchangers 31 and 32, so that the engine coolant can be cooled. In addition, since the amount of heat recovered from the outside air can be appropriately increased or decreased, it is possible to perform the capability adjustment with high followability to the fluctuation.

In this embodiment, the outdoor heat exchanger 31 is used.
And the configuration capable of bypassing any of the water heat exchangers 32 has been described. However, unless the use at extremely low temperatures as described above is assumed, only the water heat exchanger 32 can be bypassed, It is also possible to eliminate the bypass circuit 125 for bypassing the outdoor heat exchanger 31.

In this configuration, even if the outdoor heat exchanger 31 cannot recover heat sufficiently, the water heat exchanger 32 can replenish the heat. Cost can be reduced.

[0060]

As is clear from the above description, according to the present invention, the following effects can be obtained. (A) In the outdoor unit according to the first aspect, even if the amount of heat recovered from the outside air by the outdoor heat exchanger due to fluctuations in the outside temperature or the indoor load during the heating operation is excessive or insufficient, the outdoor heat exchanger or Since the refrigerant can perform heat exchange with any one of the water heat exchangers, or heat exchange can be performed at an appropriate ratio with both, the ability to follow the fluctuation is high. Adjustments can be made.

(B) In the air conditioner according to the second aspect, since the capacity can be adjusted so as to follow up the fluctuation of the outside temperature and the indoor load, the feeling of heating at the time of the low outside temperature is lowered. , And overload operation at the time of high outside temperature can be prevented.

[Brief description of the drawings]

FIG. 1 is a refrigerant circuit diagram showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the outdoor unit shown in FIG.

FIG. 3 is a cross-sectional view of the outdoor unit shown in FIG.

FIG. 4 is an enlarged view of a main part of a refrigerant circuit showing a second embodiment of the present invention.

FIG. 5 is an enlarged view of a main part of a refrigerant circuit showing a third embodiment of the present invention.

FIG. 6 is an enlarged view of a main part showing an example of a refrigerant circuit in a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Indoor unit 11 Indoor heat exchanger 12 Fan 20 Outdoor unit 31 Outdoor heat exchanger 32 Water heat exchanger 33 Compressor 41 Gas engine

Continuing from the front page (72) Inventor Saburo Kawaguchi 60-1 Kutsubo, Iwazuka-cho, Nakamura-ku, Nagoya-shi, Aichi 1

Claims (2)

[Claims] 1. An outdoor heat exchanger for exchanging heat between a refrigerant and outside air, a compressor driven by a gas engine to discharge a high-temperature and high-pressure gas refrigerant, and cooling of the gas engine. A water heat exchanger that performs heat exchange between the engine cooling water and the refrigerant, and a refrigerant amount that performs heat exchange between the outdoor heat exchanger and the heat exchange between the water heat exchanger and the water heat exchanger And an adjusting mechanism for adjusting at least one of the refrigerant amounts to be supplied. 2. An outdoor heat exchanger for exchanging heat between a refrigerant and outside air, a compressor driven by a gas engine to discharge a high-temperature and high-pressure gas refrigerant, and used for cooling the gas engine. A water heat exchanger that performs heat exchange between the engine cooling water and the refrigerant, and a refrigerant amount that performs heat exchange between the outdoor heat exchanger and the heat exchange between the water heat exchanger and the water heat exchanger An outdoor unit comprising an adjusting mechanism for adjusting at least one of the refrigerant amounts to be blown, a fan for sucking air from the room and blowing it out from the outlet, and a refrigerant supplied from the outdoor unit and sucked by the fan An air conditioner comprising: an indoor unit that includes: an indoor heat exchanger that performs heat exchange with heated air.