JPH0979688A - Engine driven type air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a refrigerant suction pipe and a refrigerant discharging pipe connected to a compressor from being damaged in fatigue by a method wherein both an engine and a compressor are vibrated in rolling around their driving shafts during operation of the engine. SOLUTION: Vibration absorbing flexible tubes 25 and 26 are installed at a refrigerant suction pipe 23 and a refrigerant discharging pipe 24 connected to a compressor 2. There vibration absorbing flexible tubes 25, 26 are arranged near an axis center of a driving shaft 22 of the compressor 2 in parallel with this axis center.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an engine-driven air conditioner.

[0002]

2. Description of the Related Art A system diagram of a conventional air conditioner of this type is shown in FIG.
Is shown in When the compressor 2 is driven by the engine 1 during the cooling operation, the gas refrigerant discharged from the compressor 2 enters the outdoor heat exchanger 4 via the four-way valve 3 as shown by the solid arrow, and here the outdoor fan is placed. By condensing and liquefying by radiating heat to the outside air sent by 7.

This liquid refrigerant is adiabatically expanded in the process of passing through the throttling mechanism 5, and then enters the indoor heat exchanger 6, where the indoor air sent by the indoor fan 8 is cooled and vaporized. Then, the gas refrigerant returns to the compressor 2 via the four-way valve 3.

During the heating operation, the four-way valve 3 is switched in the opposite direction, and the refrigerant discharged from the compressor 2 has the four-way valve 3, the indoor heat exchanger 6, the throttle mechanism 5, and the outdoor as shown by the broken line arrow. After passing through the heat exchanger 4 and the four-way valve 3 in this order, the compressor 2
Return to

Exhaust gas of the engine 1 is discharged into the atmosphere through an exhaust pipe 13, an exhaust gas heat exchanger 11 and a muffler 14 which are interposed in the exhaust pipe 13.

The cooling water whose temperature has been raised by cooling the engine 1 enters the radiator 8 where it radiates heat to the outside air sent by the outdoor fan 7 to lower the temperature. Next, in the process of passing through the heat transfer tube 12 arranged in the exhaust gas heat exchanger 11, which is energized by the cooling water circulation pump 10, the exhaust gas flowing outside the tube absorbs heat, and then returns to the engine 1.

[0007]

In the above air conditioner, the engine 1 is vibration-supported on the mount via the vibration-proof rubber.
And, the compressor 2 directly connected to this causes rolling vibration around the axis of the drive shaft 22. As a result, the refrigerant suction pipe 23 and the refrigerant discharge pipe 24 connected to the compressor 2 may vibrate greatly, which may cause fatigue failure.

[0008]

SUMMARY OF THE INVENTION The present invention has been invented to solve the above problems, and the gist of the first invention is to provide a compressor directly connected to an engine and an outdoor unit. In an engine-driven air conditioner in which a refrigeration cycle is formed by a heat exchanger, a throttle mechanism, an indoor heat exchanger, etc., a flexible tube for vibration absorption is provided in the refrigerant pipe connected to the compressor, and The engine-driven air conditioner is characterized in that the vibration absorbing flexible tube is arranged in the vicinity of the axis of the drive shaft of the compressor in parallel with the axis.

Another feature is that the vibration absorbing flexible tubes are respectively connected to the refrigerant suction pipe and the refrigerant discharge pipe connected to the compressor.

The gist of the second aspect of the present invention is to provide an engine-driven air conditioner equipped with a compressor directly connected to an engine vibration-supported on a frame, in a refrigerant suction pipe connected to the compressor. And the vibration absorbing flexible tubes are respectively interposed in the refrigerant discharge pipe, and the vibration absorbing flexible tubes are arranged in the vicinity of the axis of the drive shaft of the compressor along the axis thereof. It is in an engine-driven air conditioner.

However, since the vibration absorbing flexible tubes have a small amplitude even when the compressor is rolling-vibrated around its drive shaft during engine operation, the bending stress applied to these flexible tubes is reduced. Get smaller.

[0012]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the invention is shown in FIG. The engine 1 is supported on a frame 20 via a vibration-proof rubber 21, and the compressor 2 is directly connected to the engine 1 via a drive shaft 22. Flexible tubes 25 and 26 for absorbing vibration are provided respectively in the refrigerant suction pipe 23 and the refrigerant discharge pipe 24 connected to the compressor 2, and these flexible tubes 25 and 26 are the cores of the drive shaft 22 of the compressor 2. It is arranged along the axis 22 in the vicinity so as to be parallel to it. The other configuration is the same as that of the conventional one shown in FIG. 2, and the corresponding members are denoted by the same reference numerals and description thereof will be omitted.

Therefore, even when the engine 1 and the compressor 2 make a rolling vibration around the drive shaft 22 during the operation of the engine 1, the vibration absorbing flexible tube 2 is used.
Since the amplitude of 2 and 23 is small, the bending stress applied to these vibration absorbing flexible tubes 22 and 23 is small, and fatigue failure of these can be prevented.

[0014]

According to the present invention, when the engine is operating,
Even if the engine and the compressor make rolling vibration around the drive shaft, the vibration absorbing flexible tube has a small amplitude. As a result, the bending stress applied to the vibration absorbing flexible tube is reduced, so that these fatigue fractures can be prevented and the reliability thereof is improved.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention.

FIG. 2 is a piping system diagram of a conventional engine-driven air conditioner.

[Explanation of symbols]

 1 engine 20 frame 21 anti-vibration rubber 2 compressor 22 drive shaft 23 refrigerant suction pipe 24 refrigerant discharge pipe 25, 26 flexible tube

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minor Hanai No. 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya-shi, Nagoya Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Michio Yoneda No. 1 Takamichi, Iwatsuka-machi, Nakamura-ku, Nagoya (72) Inventor Tadahiro Kato, Asahi-cho 3-chome, Nishibiwajima-cho, Nishikasugai-gun, Aichi Prefecture Mitsubishi Heavy Industries, Ltd.

Claims (3)

[Claims] 1. A compressor driven directly by an engine,
In an engine-driven air conditioner in which a refrigeration cycle is formed by an outdoor heat exchanger, a throttling mechanism, an indoor heat exchanger, etc., a flexible tube for vibration absorption is provided in the refrigerant pipe connected to the compressor, An engine driven air conditioner characterized in that the vibration absorbing flexible tube is disposed in the vicinity of the axis of the drive shaft of the compressor and in parallel with the axis. 2. The engine-driven air conditioner according to claim 1, wherein the vibration absorbing flexible tubes are respectively provided in the refrigerant suction pipe and the refrigerant discharge pipe connected to the compressor. 3. An engine-driven air conditioner equipped with a compressor directly connected to an engine vibration-isolated on a pedestal, wherein the refrigerant suction pipe and the refrigerant discharge pipe connected to the compressor respectively absorb the vibration. An engine-driven air conditioner in which the flexible tubes for vibration absorption are arranged along the axis of the drive shaft of the compressor in the vicinity of the axis.