JP2003232578A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent engine stop due to strong wind even when a gas engine is idling. <P>SOLUTION: An intake chamber 60 for supplying air to the gas engine is provided with a pressure opening and closing cover 61 and a pressure release port 75, whereby when the pressure in the intake chamber 60 suddenly increases, the pressure opening and closing cover 61 is put in the open state so that surplus pressure is released through the pressure release port 75. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which a compressor is driven by an engine, and more particularly to a gas heat pump type air conditioner in which fuel gas is used to drive the engine.

[0002]

2. Description of the Related Art Conventionally, a gas heat pump type air conditioner in which a compressor is driven by a gas engine is known as a kind of air conditioner. In such an air conditioner, the outdoor unit includes the compressor, the four-way valve, the outdoor heat exchanger, and the outdoor expansion valve described above, and the indoor unit includes the indoor heat exchanger and the indoor expansion valve.

During the cooling operation, the outdoor heat exchanger becomes a condenser by switching the four-way valve to the cooling side.
The indoor heat exchanger serves as an evaporator, and the indoor heat exchanger cools the room by the heat of vaporization of the refrigerant.

Further, during heating operation, by switching the four-way valve to the heating side, the outdoor heat exchanger functions as an evaporator, the indoor heat exchanger functions as a condenser, and the indoor heat exchanger moves indoors by the heat of condensation of the refrigerant. Heating.

By the way, a gas engine driving a compressor for compressing a refrigerant is supplied with gas (for example, city gas or propane gas) as fuel and air (outside air) to operate.

In this case, the air supply path for supplying air to the gas engine is provided with an intake chamber for separating air and liquid such as rainwater and supplying only air.

[0007]

By the way, in the above-mentioned conventional air conditioner, it is not preferable to repeat the operation / stop of the gas engine during the operation of the air conditioner, so that the gas engine is always operated. .

Therefore, when the load is low, the gas engine is generally idling.

When the gas engine is idling, the amount of gas fuel supplied decreases, so if the amount of supply air increases due to strong wind, the gas fuel concentration may become too low and the gas engine may stop. It was

Therefore, an object of the present invention is to provide an air conditioner capable of preventing the gas engine from stopping due to a strong wind even when the gas engine is idling.

[0011]

In order to solve the above problems, in an air conditioner having a compressor and an engine for driving the compressor in a housing, an air intake port facing the outside of the housing, When the air is supplied to the engine, an intake chamber having a pressure relief portion that releases the pressure when the pressure of the air to be supplied to the engine becomes equal to or higher than a predetermined pressure is provided.

According to the above structure, the pressure relief portion takes in air from the outside of the housing through the air intake port, and when supplying air to the engine, the pressure of the air to be supplied to the engine is not less than the predetermined pressure. Relieve pressure when

In this case, the intake chamber is
The air supply path is formed in a zigzag state, and the pressure relief portion is a bent portion of the air supply path, and is provided at a position substantially perpendicular to the flow direction of the air flowing through the air supply path. You may be allowed to.

The air supply path may be divided into a plurality of chambers, and the pressure relief portion may be provided in any one of the plurality of chambers.

Further, the pressure relief portion may be provided in a chamber on the most downstream side toward the engine side among the chambers forming the air supply path.

Furthermore, the air supply path has a first chamber and a second chamber communicating with the first chamber and arranged above the first chamber, and the pressure relief portion has the above-mentioned structure. It may be provided in the second chamber.

The pressure relief portion opens the pressure relief hole provided in the housing of the intake chamber and the pressure relief hole when the pressure of the air to be supplied to the engine exceeds a predetermined pressure. In addition to the above state, a movable lid part may be provided which closes the pressure relief hole when the pressure of the air is less than the predetermined pressure.

Further, the movable lid portion may close the pressure relief hole by its own weight when the pressure of the air is less than the predetermined pressure.

Furthermore, the movable lid portion is for opening the pressure relief hole to an open state or a closed state, and for urging the lid portion in a direction to close the pressure relief hole. The biasing unit may be provided.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram showing a refrigerant circuit of the air conditioner of this embodiment.

As shown in FIG. 1, a heat pump type air conditioner 10 includes an outdoor unit 11 and a plurality of units (two units in FIG. 1).
It has indoor units 12A and 12B and a control device 13.

The outdoor refrigerant pipe 14 of the outdoor unit 11 and the indoor unit 1
The indoor refrigerant pipes 15A and 15B of 2A and 12B are connected to each other.

The outdoor unit 11 is installed outdoors and houses an outdoor heat exchanger 19 and a plurality of outdoor fans 20.
In order to improve the heat exchange efficiency of the outdoor heat exchanger 19,
The radiator 46 is integrally attached.

A compressor 16 is provided in the outdoor unit 11 and is connected to the outdoor refrigerant pipe 14 described above.

The compressor 16 is connected to a gas engine 30 via a flexible coupling 27 and is driven by the gas engine 30. An accumulator 17 is provided on the suction side of the compressor 16. Further, a four-way valve 18 is provided on the discharge side of the compressor 16.

An outdoor heat exchanger 19, a strainer 28, an outdoor expansion valve 24 and a dry core 25 are sequentially connected to the four-way valve 18.

A refrigerant system bypass pipe 26 is arranged to bypass the outdoor expansion valve 24.

Further, the strainer 28 filters out harmful solids and particles from the refrigerant. Further, the safety valve 29 releases the refrigerant pressure on the discharge side of the compressor 16 to the suction side of the compressor 16.

To the gas engine 30, a fuel supply device 31 for supplying gas as fuel through a throttle valve 36 for adjusting the mixing ratio of air and fuel, and air and liquid such as rainwater are separated and only air is supplied. Intake chamber 6
0 is connected. The intake chamber 60 also functions as a muffler and also has a function of reducing the sound of the supplied air.

The fuel supply device 31 includes a fuel supply pipe 32,
It is provided with two fuel cutoff valves 33, a zero governor 34 and a fuel adjustment valve 35.

The two fuel cutoff valves 33 are arranged in series to form a two-closed type fuel cutoff valve mechanism, and the two fuel cutoff valves 33 are interlocked to be fully closed or fully opened to cause leakage of fuel gas. There is an alternative implementation of uninterrupted blocking and communication.

The zero governor 34 has a primary pressure a of the primary side fuel gas pressure (primary pressure a) and the secondary side fuel gas pressure (secondary pressure b) before and after the zero governor 34 in the fuel supply pipe 32. Also, the secondary pressure b is adjusted to a constant predetermined pressure by the fluctuation of 1 to stabilize the operation of the gas engine 30.

The fuel adjustment valve 35 adjusts the fuel supply amount so as to optimally adjust the air-fuel ratio of the produced air-fuel mixture.

Here, the intake chamber 60 will be described with reference to the drawings.

FIG. 2 is an external perspective view of the intake chamber 60.

The intake chamber 60 has a rectangular parallelepiped intake chamber body 60A and a lid panel 60B. The lid panel 60B is screwed to the intake chamber main body 60A via a packing member (not shown). A pressure opening / closing lid 61 that functions as a pressure relief portion is provided on the upper surface of the intake chamber 60A. An air supply pipe 62 is provided on the left side surface of the intake chamber 60 so as to project therefrom.

FIG. 3 shows the intake chamber 60 to the lid panel 60.
The external perspective view in the state which removed B is shown.

At the lower part of the intake chamber main body 60A, an air intake 71 which is exposed to the outside of the casing of the outdoor unit 11 when mounted.
Is provided. Further, the inside of the intake chamber main body 60A is divided into two chambers 74A and 74B by a partition plate 72. The two chambers 74A and 74B are connected by a cylindrical communication pipe 73, and the air intake 71, the chamber 74A, the communication pipe 73, the chamber 74B, and the air supply pipe 6 are connected.
2 forms an air supply path as a whole. Figure 3
As shown in, the air supply path is formed in a folded state.

The above-mentioned pressure opening / closing lid 61 is provided on the upper surface of the intake chamber main body 60A, which is a bent portion of the air supply path and is substantially vertical to the flow direction of the air flowing through the air supply path. ing.

Fuel supply device 31 and intake chamber 60
A throttle valve 36 is connected in the subsequent stage, and the throttle valve 36 adjusts the supply amount of the air-fuel mixture supplied to the combustion chamber of the gas engine 30 to control the rotation speed of the gas engine 30.

Further, an engine oil supply device 37 is connected to the gas engine 30. The engine oil supply device 37 has an oil supply pipe 38 provided with an oil cutoff valve 39, an oil supply pump 40, and the like, and appropriately supplies engine oil to the gas engine 30.

On the other hand, the indoor units 12A and 12B are installed indoors, and the indoor refrigerant pipes 15A and 15B are respectively installed.
The indoor heat exchangers 21A and 21B are installed in the. At the same time, the indoor expansion valves 22 are provided near the indoor heat exchangers 21A and 21B in the indoor refrigerant pipes 15A and 15B, respectively.
A and 22B are provided. Indoor heat exchangers 21A, 21B
The indoor fans 23A and 23B for blowing air to the indoor heat exchangers 21A and 21B are installed adjacent to each other.

The controller 13 also controls the operation of the outdoor unit 11 and the indoor units 12A and 12B. In particular,
The control device 13 controls the gas engine 30 in the outdoor unit 11.
(By extension, compressor 16), four-way valve 18, outdoor fan 20
And the outdoor expansion valve 24, and the indoor expansion valves 22A and 22B and the indoor fan 23 in the indoor units 12A and 12B.
Control A and 23B respectively. Further, the control device 13
Is a circulation pump 47 of the engine cooling device 41 described later,
The hot water three-way valve 45, the external pump 50, and the like are controlled.

The engine cooling device 41 has one end connected to the exhaust gas heat exchanger (not shown) attached to the gas engine 30 via the gas engine 30. Further, the wax three-way valve 4 is connected to a cooling water pipe 42 having a substantially closed loop shape in which the other end of the engine cooling device 41 is directly connected to the exhaust gas heat exchanger.
3, hot water heat exchanger 44 as a heat exchanger, hot water three-way valve 4
5, a radiator 46 and a circulation pump 47 are sequentially arranged, and are configured to have a cooling system bypass pipe 48 and a hot water supply system 49.

The circulation pump 47 pressurizes the engine cooling water during operation and circulates the engine cooling water in the cooling water pipe 42.

The wax three-way valve 43 is used for the gas engine 30.
This is for promptly warming up. The wax three-way valve 43 has an inlet 43A connected to the exhaust water heat exchanger side of the cooling water pipe 42 attached to the gas engine 30. In addition, the wax three-way valve 43 has a low temperature side outlet 43.
B is connected to the suction side of the circulation pump 47 in the cooling water pipe 42. Further, the high temperature side outlet 43C of the wax three-way valve 43 is connected to the hot water heat exchanger 44 in the cooling water pipe 42.
Connected to the side.

The hot water heat exchanger 44 exchanges heat between the hot water as the second medium flowing through the external pipe 51 of the hot water supply system 49 having the external pump 50 and the engine cooling water flowing from the wax three-way valve 43. Then, the hot water of the hot water supply system 49 is heated by the exhaust heat of the gas engine 30 to raise the temperature.

The hot water three-way valve 45 has an inlet 45A connected to the hot water heat exchanger 44 side of the cooling water pipe 42 and arranged downstream of the hot water heat exchanger 44. Also,
The ON side outlet 45B of the hot water three-way valve 45 is provided with the cooling water pipe 42.
Is connected to the suction side of the circulation pump 47. Further, the OFF side outlet 45C of the hot water three-way valve 45 is connected to the radiator 46 side of the cooling water pipe 42. In the present embodiment, the engine cooling water flowing from the hot water heat exchanger 44 via the inlet 45A is exclusively supplied to the suction side of the circulation pump 47 via the ON side outlet 45B or to the radiator 46 via the OFF side outlet 45C. It is a switchable three-way valve that leads to. The hot water three-way valve 45 is driven by a motor, and the motor is controlled by the control device 13.

The radiator 46 is arranged adjacent to the outdoor heat exchanger 19 of the air conditioner 10. The engine cooling water is radiated and the engine cooling water is cooled to a predetermined temperature (for example, 40
[° C]).

The cooling system bypass pipe 48 is the cooling water pipe 42.
At the outlet of the hot water heat exchanger 44 and the radiator 46
And the hot water three-way valve 45 is bypassed.
As a result, the cooling system bypass pipe 48 is connected to the hot water three-way valve 45.
However, when most of the engine cooling water flowing out from the hot water heat exchanger 44 is guided from the ON side outlet 45B to the suction side of the circulation pump 47 via the inlet 45A, the hot water heat exchanger 4
A part of the engine cooling water that has flowed out of No. 4, that is, a certain amount of the engine cooling water is always guided to the radiator 46 via the cooling system bypass pipe 48.

Next, the overall operation of the air conditioner will be described.

First, the outline of the driving operation will be described.

The heat pump type air conditioner 10 is set to the cooling operation or the heating operation by switching the four-way valve 18 by the control device 13.

More specifically, the controller 13 controls the four-way valve 18
When is switched to the cooling side, the refrigerant flows as shown by the solid arrow in the portion of the four-way valve 18. As a result, the outdoor heat exchanger 19 functions as a condenser, and the indoor heat exchangers 21A and 21B function as evaporators, and the indoor heat exchangers 21 are cooled.
A and 21B cool the room.

Further, when the control device 13 switches the four-way valve 18 to the heating side, the refrigerant flows as shown by the broken line arrow in the portion of the four-way valve 18. As a result, the indoor heat exchanger 21
A and 21B serve as condensers, and the outdoor heat exchanger 19 serves as an evaporator to enter the heating operation state.
B heats the room.

Further, the control device 13 is
The valve opening degree of each of the indoor expansion valves 22A and 22B is controlled according to the air conditioning load. During heating operation, the control device 13
Controls the opening degree of each of the outdoor expansion valve 24 and the indoor expansion valves 22A and 22B according to the air conditioning load.

Next, the control of the gas engine 30 will be described.

Specifically, the control of the gas engine 30 by the control device 13 includes the fuel cutoff valve 33 of the engine fuel supply device 31, the zero governor 34, the fuel adjusting valve 35 and the actuator 36, and the oil cutoff of the engine oil supply device 37. This is done by the control device 13 controlling the valve 39 and the oil supply pump 40.

By the way, the gas engine 30 is cooled by the engine cooling water as the first medium circulating in the engine cooling device 41.

The engine cooling water flows into the exhaust gas heat exchanger of the gas engine 30 at about 40 ° C. from the discharge side of the circulation pump 47. The engine cooling water flows in the gas engine 30 after recovering exhaust heat of the gas engine 30 (heat of exhaust gas) to cool the gas engine 30,
It is heated to 0 [° C].

From the gas engine 30 to the wax three-way valve 43
The engine cooling water that has flowed into the low temperature side outlet 43B when the engine cooling water has a low temperature (for example, 80 [° C.] or lower).
Is returned to the circulation pump 47 to quickly warm up the gas engine 30. On the other hand, the engine cooling water has a high temperature (for example, 8
When the temperature is 0 [° C.] or higher), it flows from the high temperature side outlet 43C to the hot water heat exchanger 44.

The hot water in the hot water supply system 49 is, for example, about 60 ° C.
At that time, it flows into the hot water heat exchanger 44, and is thereby heated to about 70 ° C. and supplied to the outside. The hot water of the hot water supply system 49 thus heated is used for hot water supply and for drying the dehumidifying agent of the desiccant air conditioner. Here, the desiccant air conditioner means an air conditioner that can perform dehumidification by using a dehumidifying agent without lowering the room temperature.

The engine cooling water, which has been heat-exchanged with the hot water of the hot water supply system 49 by the hot water heat exchanger 44, is cooled (cooled) down to about 65 ° C. and is flown to the hot water three-way valve 45.

The hot water three-way valve 45 is provided for the hot water heat exchanger 4 when the temperature of the engine cooling water does not exceed the reference temperature value.
The engine cooling water flowing from 4 through the inlet 45A
It is led from the N-side outlet 45B to the exhaust gas heat exchanger of the gas engine 30 via the suction side of the circulation pump 47. The gas engine 30 is cooled by the engine cooling water guided to the exhaust gas heat exchanger.
Is cooled. Further, the hot water three-way valve 45 is provided for the hot water heat exchanger 4 when the temperature of the engine cooling water exceeds the reference temperature value.
The engine cooling water flowing from 4 through the inlet 45A
The FF side outlet 45C leads to the radiator 46.

With the radiator 46, for example, about 40 ° C.
The engine cooling water cooled to the above is returned to the exhaust gas heat exchanger of the gas engine 30 via the suction side of the circulation pump 47,
The gas engine 30 is cooled.

As a result, the switching of the hot water three-way valve 45, which causes the engine cooling water flowing from the inlet 45A to flow from the ON side outlet 45B to the suction side of the circulation pump 47, is stabilized for a long time. Therefore, the cycle of the switching control for switching the hot water three-way valve 45 to the ON-side outlet 45B and the OFF-side outlet 45C can be stabilized for a long time.

Further, since the engine cooling water can be kept at a high temperature within the range where the cooling of the gas engine 30 is not hindered, the heat exchange efficiency of the hot water heat exchanger 44 is improved, and the high temperature (about 70 It is possible to satisfactorily take out hot water of (° C).

As described above, during the heating operation of the air conditioner 10, the control device 13 operates the circulation pump 47 of the engine cooling device 41 to circulate the engine cooling water,
The external pump 50 is stopped, and further, the hot water three-way valve 45 is introduced so that the engine cooling water flowing from the hot water heat exchanger 44 into the inlet 45A is guided from the OFF side outlet 45C to the radiator 46.
Switch control. Therefore, the heat radiated from the radiator 46 (exhaust heat of the gas engine 30) is taken into the outdoor heat exchanger 19 functioning as an evaporator and used as a heat source for the evaporator.

On the other hand, during the cooling operation of the air conditioner 10, the control device 13 operates the circulation pump 47 of the engine cooling device 41 to circulate the engine cooling water and operates the external pump 50 to operate the hot water heat exchanger 44. And when most of the engine cooling water has a temperature below the reference value, most of the engine cooling water flowing out from the hot water heat exchanger 44 is
Circulation pump 47 from ON side outlet 45B through inlet 45A
The hot water three-way valve 45 is switched and controlled so as to lead to the suction side of. At this time, a certain amount of the engine cooling water flowing out from the hot water heat exchanger 44 is always guided to the radiator 46 via the cooling system bypass pipe 48.

By the switching control of the hot water three-way valve 45, the temperature of the engine cooling water is not cooled by the radiator 46 more than necessary, so that the heat exchange efficiency of the hot water heat exchanger 44 is improved and the hot water supply system is improved. High temperature due to 49 (70
Hot water of [℃]) is taken out and used effectively. Moreover,
Cooling (heat dissipation) by heat exchange by the hot water heat exchanger 44
The heat quantity of the engine cooling water that is insufficient is radiated by the engine cooling water that is guided to the radiator 46 through the cooling system bypass pipe 48.
It is cooled well by this engine cooling water.

When the temperature of the engine cooling water exceeds the reference temperature value during the cooling operation, the controller 13
Is the OFF side outlet 45C for the engine cooling water flowing from the warm water heat exchanger 44 through the inlet 45A into the warm water three-way valve 45.
The hot water three-way valve 45 is switched and controlled so that the hot water three-way valve 45 is guided to the radiator 46. As a result, the temperature of the engine cooling water is lowered and the gas engine 30 is cooled well.

Next, the detailed operation of the intake chamber 60 will be described.

Since the air supply path in the intake chamber 60 is formed in a zigzag state as described above, it is possible to prevent a rapid supply of air into the gas engine 30 as a so-called muffler, It suppresses the generation of unnecessary sounds.

Further, when the amount of air supplied to the gas engine 30 is within a preset proper supply amount range (within an appropriate pressure range), the pressure opening / closing cover 61 has its own weight. The weight of the pressure release port 75 is set so that the pressure release port 75 is closed. At the same time, the pressure opening / closing lid 61 causes the intake chamber 60 to
When the amount of air supplied to the gas engine 30 exceeds a preset appropriate supply amount, that is, when the pressure in the intake chamber 60 rapidly increases, Pressure release port by pressure 75
The weight is set so that is opened.

That is, as shown in FIG. 3, when the amount of air supplied to the gas engine 30 is within a preset proper supply amount range, the pressure opening / closing lid 61 is closed by its own weight. As a result, the air supplied from the air intake 71 reaches the throttle valve 36 through the path indicated by the arrows F1 → F2 → F3. Then, it is mixed with the gas supplied by the fuel supply device 31, adjusted to an appropriate mixing ratio by the throttle valve, and supplied to the gas engine 30.

On the other hand, when the air is rapidly supplied into the intake chamber 60 due to a strong wind or the like, as shown in FIG. 4, the air supplied from the air intake 71 is indicated by the arrow F1 →
It will flow with F20. However, arrow F20
The air (air flow) represented by the arrow F21 that constitutes a part of the supply air represented by is passed straight through the communication pipe 73 and then goes straight on to hit the pressure opening / closing lid 61, and the pressure opening / closing lid 61.
The pressure opening / closing lid 61 is pushed up against the weight of. And
The pressure release port 75 is opened, and the air (air flow) indicated by the arrow F21 is discharged to the outside of the intake chamber 60.

As a result, only the air (air flow) represented by the arrow F22 (= F23) is supplied to the air supply pipe 62 side, the gas fuel concentration does not become too low, and the gas engine stops. There is no end.

As described above, if the intake chamber 60 provided with the pressure opening / closing lid 61 is provided, the pressure opening / closing lid 61 is opened even when the pressure in the intake chamber 60 is rapidly increased due to strong wind or the like. As a result, excess pressure can be released via the pressure release port 75.

Therefore, the amount of air supplied to the gas engine 30 can be stabilized. That is, even when the gas engine is in the idling operation state, excessive supply of air does not cause the gas fuel concentration to become too low, the gas engine does not stop, and the stable air conditioner 10 is provided. It becomes possible to drive.

Although the present invention has been described based on the above embodiment, the present invention is not limited to this.

In the above-described embodiment, the pressure opening / closing lid 61 is configured to be closed by its own weight. However, for example, it may be closed by an urging force of an elastic member such as a spring or rubber or urging force and its own weight. Can be configured to.

Specifically, as shown in FIG. 5, the chamber 74B
The support member 60E having the engaging portion 60D is provided inside the intake chamber main body 60A corresponding to the shaft 61 of the pressure opening / closing lid 61.
An engaging portion 61B is provided at one end of A. And the engaging portion 60D
And the spring 65 is engaged with the engaging portion 61B. The spring constant of the spring 65 (corresponding to the urging force) is equal to that of the intake chamber 60.
It is set in correspondence with the maximum pressure of the pressure that can be tolerated in the inside, that is, the pressure that does not need to be released.

Thus, when the pressure in the intake chamber 60 is within the allowable pressure, the pressure opening / closing lid 61 is urged downward by the spring 65 in FIG.
And comes into a closed state.

On the other hand, when the pressure in the intake chamber 60 exceeds the allowable pressure, the pressure opening / closing lid 61 is driven upward as shown in FIG. 5 against the urging force of the spring 65. As shown by the arrow F21, it is separated from the packing 60C, the pressure is released, and even if the gas engine is in the idling operation state, the air is not excessively supplied and the gas engine does not stop and is stable. The air conditioner 10 can be operated.

Further, in the above embodiment, the pressure opening / closing lid 61 is used.
Since it was closed using its own weight, the pressure lid 6
1 and the pressure release port 75 were provided on the upper surface of the intake chamber 60, but if the configuration is such that an elastic member such as a spring is used to forcefully close the side surface of the intake chamber 61, It is possible to provide the pressure relief portion at an arbitrary position such as the lower surface. As a result, the degree of freedom in design is improved.

In the above embodiment, the case where the intake chamber 60 has two chambers 74A and 74B has been described, but it is also possible to have three or more chambers. In this case, the pressure relief portion may be provided in any chamber. However, more preferably, it is provided in a chamber closest to the gas engine, so that the operation frequency can be reduced and the allowable pressure can be reduced, so that the pressure relief portion can be downsized and the operation noise can be reduced.

In the above description, only the gas heat pump type air conditioner has been described, but the same can be applied to the intake chamber of the gas heat pump type refrigerating apparatus.

[0089]

According to the present invention, even if the pressure in the intake chamber suddenly rises due to a strong wind or the like, the pressure relief portion releases the extra pressure to stabilize the amount of air supplied to the gas engine. Can be transformed. That is, even if the gas engine is in the idling operation state,
Excessive supply of air prevents the gas fuel concentration from becoming too low, the gas engine does not stop, and the air conditioner can be operated stably.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a refrigerant circuit of an air conditioner of an embodiment.

FIG. 2 is an external perspective view of the intake chamber of the embodiment.

FIG. 3 is an external perspective view showing a state in which a lid panel is removed from the intake chamber.

FIG. 4 is an operation explanatory diagram when the pressure opening / closing lid of the embodiment is in an open state.

FIG. 5 is an explanatory diagram of a pressure opening / closing lid according to another embodiment.

[Explanation of symbols]

10 Air conditioner 11 outdoor unit 13 Control device 16 compressor 19 outdoor heat exchanger 21A, 21B Indoor heat exchanger 30 gas engine 60 intake chamber 60A intake chamber body 60B lid panel 60C packing 60D engagement part 60E support 61 Pressure open / close lid (pressure relief section, movable lid section) 61A axis 61B Engagement part 62 Air supply piping 65 spring (biasing part) 71 Air intake 72 Partition plate 73 Communication piping 74A, 74B room 75 Pressure release port (pressure relief part, pressure relief hole)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Arai             1 Otsuki-cho, Ashikaga City, Tochigi Prefecture Sanyo Electric Air Conditioning             Within the corporation F term (reference) 3L060 AA02 CC09 DD08 EE27

Claims (8)

[Claims] 1. An air conditioner having a compressor and an engine for driving the compressor in a housing, the air intake opening facing the outside of the housing, and the engine for supplying air to the engine. An air conditioner comprising: an intake chamber having a pressure relief portion that releases the pressure when the pressure of the air to be supplied to the air conditioner exceeds a predetermined pressure. 2. The air conditioner according to claim 1, wherein the intake chamber has an air supply path formed in a folded state, and the pressure relief portion is a bent portion of the air supply path. An air conditioner provided at a position substantially perpendicular to a flow direction of air flowing through the air supply path. 3. The air conditioner according to claim 1, wherein the air supply path is divided into a plurality of chambers, and the pressure relief portion is provided in any one of the plurality of chambers. An air conditioner characterized by the above. 4. The air conditioner according to claim 3, wherein the pressure relief portion is provided in a chamber on the most downstream side toward the engine side among the chambers forming the air supply path. A characteristic air conditioner. 5. The air conditioner according to claim 4, wherein the air supply path includes a first chamber and a second chamber that communicates with the first chamber and that is disposed above the first chamber. The pressure relief part is provided in the second chamber. 6. The air conditioner according to any one of claims 1 to 5, wherein the pressure relief portion should be supplied to the engine and a pressure relief hole provided in a casing of the intake chamber. A movable lid portion that opens the pressure relief hole when the pressure of air becomes equal to or higher than a predetermined pressure, and closes the pressure relief hole when the pressure of the air is lower than the predetermined pressure, An air conditioner comprising: 7. The air conditioner according to claim 6, wherein the movable lid portion closes the pressure relief hole by its own weight when the pressure of the air is less than the predetermined pressure. Air conditioner. 8. The air conditioner according to claim 6, wherein the movable lid portion has a lid portion for opening the pressure relief hole in an open state or a closed state, and a direction for closing the pressure relief hole in a closed state. An urging portion for urging the lid portion, and an air conditioner.