JP2002235966A - Engine-driven air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine-driven air conditioner, in which elevation of environmental temperature is restrained around vibration insulators which is installed in a machine room, and deteriorated by heat, and engine noise generated in the machine room is made difficult to come out to the outside. SOLUTION: The engine-driven air conditioner 20 includes an air conditioner main body 20A, an engine 25 mounted on a base frame 24 of the main body 20A, a compressor 26 driven by the engine 25, and a machine room 23, which is formed in the main body, covered around with an exterior panel 27, and provided with the engine 25 and the compressor 26. An air intake passage 33 is formed in the base frame 24. Cooling means 46, 48 and 51 are provided to introduce outside air through the passage 33 to vibration insulators 36, 38 and 42.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure for cooling or ventilating a machine room of an engine-driven air conditioner.

[0002]

2. Description of the Related Art Generally, in an engine-driven air conditioner in which a compressor is driven by an engine, as shown in FIG. 4, an apparatus body (hereinafter referred to as an outdoor unit) 1 is a partition plate 3 having an intake port 2. It is divided vertically and has a heat exchanger room 4 at the top and a machine room 5 at the bottom.

In the machine room 5, the engine 6 and a compressor 7 driven by the engine 6 are installed. In order to prevent noise generated from the engine 6, the compressor 7 and the like from leaking outside, A partition plate 3 is provided at an upper portion, a base frame 8 is provided at a lower portion, and an exterior panel 12 is provided around the partition plate 3, and covers the machine room 5. Further, since the machine room 5 is kept airtight and the engine 6 generates heat, the temperature inside the machine room 5 rises. For this reason, a ventilation port 14 is provided in the machine room 5 to suck in outside air. The electrical box 1 provided in the machine room 5
Openings 13a and 13b are also provided on the back and side surfaces of 3 and the opening 13a on the back and the ventilation port 14 of the exterior panel 12 are connected by a duct or the like (not shown). FIG. 5 shows the machine room 5
3 is a plan cross-sectional view, and solid and broken arrows indicate the flow of air in the machine room 5.

[0004] An outdoor heat exchanger 15 and an outdoor blower 16 are arranged in the heat exchanger room 4, and by operating the outdoor blower 16, dirty air warmed in the machine room 5 is sucked from the intake port 2. The air is discharged outside through the heat exchanger room 4. Thereby, the machine room 5 is ventilated and cooled, and the temperature rise of the machine room 5 is suppressed, and the noise generated in the machine room 5 is prevented from leaking to the outside as much as possible.

[0005]

In recent years, noise reduction in air conditioners has been the most serious problem, and further noise reduction has been attempted. When the airtightness of the machine room 5 is increased to reduce the noise, the temperature around the engine 6 provided in the machine room 5 increases, and the vibration isolator of the engine 6 having the rubber for vibration isolation and the like becomes high temperature. Exposed. for that reason,
There is a problem that the anti-vibration device is deteriorated before performing its function for a required time.

In order to reduce the temperature of the machine room 5,
If the ventilation opening 14 is simply enlarged, noise easily leaks from the ventilation opening 14 to the outside, which leads to an increase in the noise to the outside.

The present invention has been made to solve the above-mentioned conventional problems, and is provided in a machine room.
An object of the present invention is to provide an engine-driven air conditioner that suppresses the ambient temperature of a vibration isolator that deteriorates due to heat and makes it difficult for noise such as engine noise generated in a machine room to leak to the outside.

[0008]

According to one aspect of the present invention, there is provided an apparatus main body, an engine mounted on a base frame of the apparatus main body, and driven by the engine. In an engine-driven air conditioner including a compressor, a machine room formed in an apparatus main body, a periphery of which is covered with an exterior panel, and in which an engine and a compressor are housed, an air intake passage is provided in the base frame. And cooling means for guiding external air to the vibration isolator of the engine through the passage.

According to a second aspect of the present invention, in the engine-driven air conditioner according to the first aspect, the base frame forms an air intake passage by combining a plurality of plates.

According to a third aspect of the present invention, in the engine-driven air conditioner according to the first or second aspect, a sound insulating material is incorporated in the base frame.

According to a fourth aspect of the present invention, in the engine-driven air conditioner of the first aspect, the cooling means includes a fan and a duct.

According to a fifth aspect of the present invention, in the engine-driven air conditioner according to the fourth aspect, the fan is directly connected to a drive shaft of the engine.

According to a sixth aspect of the present invention, in the engine-driven air conditioner according to the first or second aspect, the air intake passage has an air intake at one end provided at an end of the base frame. The air outlet at the other end is provided near the end of the base frame on the side opposite to the air inlet.

According to a seventh aspect of the present invention, in the engine-driven air conditioner according to the first, second or sixth aspect, the air intake passage is formed in a meandering shape.

According to an eighth aspect of the present invention, in the engine-driven air conditioner according to the first, second or fifth aspect, the cooling device includes a fan case for accommodating a fan. It is characterized in that air is blown out toward the device.

According to a ninth aspect of the present invention, in the engine-driven air conditioner according to the eighth aspect, the fan case is provided with a plurality of outlets.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic longitudinal sectional view showing an engine-driven air conditioner according to an embodiment of the present invention.

Referring to FIG. 1, an outdoor unit 20 constituting an engine-driven air conditioner partitions an inside of an outdoor unit main body 20A up and down, and a partition plate 21 having an intake port 2 has a heat exchanger room 22 at an upper part. , A machine room 23 is provided below.

The machine room 23 has a base frame 24
An engine 25 mounted on the base frame 24 and a compressor 26 driven by the engine 25 are housed therein. The periphery of the machine room 23 is covered with an exterior panel 27.

The base frame 24 has an upper base frame 24a and a base base frame 24b on which the upper base frame 24a is mounted, and has a double structure. The upper base frame 24a includes an iron plate (hereinafter, referred to as an upper plate) 31a that covers a bottom surface of the machine room 23, and an upper plate 31a.
The base base frame 24b is formed by connecting a plurality of structural members 28 having a C-shaped cross section and provided on the lower surface of the lower plate 31a. And the structural member 28 disposed in the first position. The peripheral side surfaces of the upper and base frames 24a and 24b are covered with an iron plate.

A gap (hereinafter referred to as a gap portion 31c) is formed between the upper plate 31a and the lower plate 31b.
1c is the top and base frame 24a,
The space 31c is closed with an iron plate covering the peripheral side surface, and an air intake passage 33 is provided in the gap 31c. The air intake passage 33 communicates with one end of the air intake passage 33 and has an air intake 32 provided at an end of the base frame 24 and opening downward. The upper plate 31a located near the end of the base frame on the opposite side is provided with an air outlet 35 communicating with the other end of the air intake passage 33.

The air intake passage 33 is formed in a meandering shape by disposing a structural member 28 in the gap 31c, for example, as shown in FIG. In the air intake passage 33, the upper plate 31
a sound insulating material 3 such as glass wool or foam material protruding below
4 and the sound insulating material 34 protruding above the lower plate 31b are also formed in a meandering shape up and down. By providing the air intake passage 33 in a meandering shape to lengthen the passage and providing the sound insulation material 34 in the air intake passage 33, the machine room 2
The sound generated in the air intake 3 is transmitted from the air intake passage 33 to the air intake 3
2 makes it hard to leak outside.

The engine 25 has four mounting portions 36 projecting from both sides, and these mounting portions 36 are provided with four support legs 37.
It is placed on and fixed. The supporting leg 37 has a hollow prism inside, and a receiving plate 38 is formed on the upper portion of the supporting leg 37. The receiving plate 38 and the engine mounting portion 36 are formed.
Are fixed with bolts via vibration isolating rubber 42.

The engine 25 has a drive shaft 43 protruding from one end thereof.
4 are connected by a belt 45 to drive the compressor 26, and a centrifugal fan 46 is attached to the other end.

FIG. 3 is a schematic illustration of the periphery of the engine viewed from the front of the centrifugal fan. As shown in the figure, a fan case 48 that has a suction port 47a in front of the centrifugal fan 46, two outlets 47b and 47c in a diagonally downward direction, and accommodates the centrifugal fan 46 is provided. The air blown out of the fan case 48 blows against the vibration isolating rubbers 42 on the centrifugal fan 46 side of the support leg 37, passes through the lower portion of the engine 25, and then passes through the lower portion of the engine 25.
Spray on 2,42.

As shown in FIG. 1, one end of a flexible intake hose 51 is connected to the suction port 47a of the fan case 48, and the other end of the intake hose 51 is connected to the air outlet 35. ing.

Here, an outdoor blower 53 is disposed in the upper part of the heat exchanger room 22, and when the outdoor blower 53 is operated, air in the machine room 23 is supplied to an intake port 54 formed in the partition plate 21. As a result, the air is exhausted from the heat exchanger room 22 to the outside. Note that a sound insulating material 34 is attached to the lower surface of the partition plate 21.

In the machine room 23, an electric box 55 is provided.
Is provided. The electrical box 55 includes a control device for controlling the engine 25 and the compressor 26, and switches and control panels for other electrical equipment in the machine room 23 (not shown).
Is stored. The temperature inside the electrical box 55 rises due to energization. In particular, the temperature of the machine room 23 of the engine-driven air conditioner tends to increase with the operation of the engine 25. For this reason, the electrical box 55 has the rear opening 5
6 and a lateral opening 57 are provided. The rear opening 56 is an intake of outside air formed in the exterior panel 27 (not shown).
The lateral opening 57 opens into the machine room 23.

When the air conditioner is operated in the outdoor unit 20 formed as described above, the fan of the outdoor blower 53 of the heat exchanger room 22 rotates, and the outdoor heat exchanger is placed in the heat exchanger room 22. Outside air flows into the heat exchanger room 22 through 52, and air in the machine room 23 is sucked in through the air inlet 54. In the machine room 23, the internal pressure is reduced, and outside air is taken into the machine room 23 through the rear opening 56 and the horizontal opening 57 of the electrical component box 55.

On the other hand, the drive shaft 43 of the engine 25 rotates, the centrifugal fan 46 rotates, and the air intake passage 33 and the intake hose 51 extend from the air intake 32 of the base frame 24.
The outside air is taken in through the suction port 47a of the fan case 48. This taken-in air is the engine 25
Of the centrifugal force fan 46, and flows through the lower part of the engine 25 to cool the inside of the machine room 23, and to cool the inside of the machine room 23, Spray on 42. Then, the air flows out of the air inlet 54 through the heat exchanger chamber 22 to the outside.

As described above, the air blown out by the centrifugal fan 46 hits the vibration isolating rubber 42, and by cooling the vibration isolating rubber 42, thermal deterioration of the vibration isolating rubber 42 is suppressed, the performance is maintained for a long time, and the life is shortened. Can be lengthened.

Further, an air intake passage 33 communicating with the air intake port 32 is formed in the base frame 24, a sound insulating material 34 is provided in the air intake passage 33, and the air intake passage 33 is provided.
Since the noise generated in the machine room 23 is attenuated in the air intake passage 33 by making the wire meandering and long, the sound leaking from the air intake 32 to the outside through the air intake passage 33 can be reduced. Further, since the base frame 24 has a double structure of the upper base frame 24a and the base base frame 24b, and the sound insulating material 34 is provided inside the double structure, the sound generated in the machine room 23 passes through the base frame 24. Transmitted transmitted sound can be reduced.

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

[0034]

As described above, in the engine-driven air conditioner, the machine room accommodating the engine and the compressor has a partition plate at the top, an outer panel at the periphery, and a base frame having a double structure at the bottom. Since the air inlet is provided at the end of the base frame, the air outlet is provided at the top of the base frame, and the air intake passage is provided in the base frame, the outside air is taken into the machine room. Makes it difficult for the noise generated in the air to pass through the air intake passage and the air intake, thereby reducing the noise leaking to the outside.

Further, by providing the base frame with a double structure and providing the sound insulating material, it is possible to make it difficult for the sound generated in the machine room to transmit through the base frame to the outside.

A fan is mounted on the drive shaft of the engine, covered with a fan case accommodating the fan, and the suction port of the fan case is connected to the air outlet at the top of the base frame by an intake hose, and is connected to the machine room. Since the taken-in outside air is blown to the vibration isolator, the ambient temperature around the vibration isolator decreases, deterioration of the vibration isolator due to heat can be suppressed, and the performance can be maintained for a long time.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing an engine-driven air conditioner according to an embodiment of the present invention.

FIG. 2 is a plan view showing an example of an air intake passage with an upper plate removed.

FIG. 3 is an explanatory view showing an intake blower of the present invention and a flow of air.

FIG. 4 is a schematic longitudinal sectional view showing a conventional engine-driven air conditioner.

FIG. 5 is a schematic plan sectional view showing the flow of air in a conventional machine room.

[Explanation of symbols]

 Reference Signs List 20 outdoor unit 20A outdoor unit main body (apparatus main body) 21 partition plate 22 heat exchanger room 23 machine room 24 base frame 25 engine 26 compressor 28 structural member 31a upper plate 31b lower plate 31c gap 32 air intake 33 air intake Passage 34 Sound insulation material 35 Air outlet 36 Mounting part (vibration isolator) 37 Support leg 38 Receiving plate (vibration isolator) 42 Vibration isolator rubber (vibration isolator) 43 Drive shaft 46 Centrifugal fan (cooling means) 47a Suction port 47b, 47c Air outlet 48 Fan case (cooling means) 51 Intake hose (cooling means) 52 Outdoor heat exchanger 53 Outdoor blower 54 Intake port 55 Electrical box 56 Rear opening 57 Lateral opening

Claims (9)

[Claims] 1. An apparatus main body, an engine mounted on a base frame of the apparatus main body, a compressor driven by the engine, and an engine formed inside the apparatus main body and covered with an exterior panel. And a machine room accommodating a compressor, wherein an air intake passage is formed in the base frame, and cooling means for guiding external air to the vibration isolator of the engine through the passage. An engine-driven air conditioner, comprising: 2. The engine-driven air conditioner according to claim 1, wherein the base frame comprises an air intake passage formed by combining a plurality of plates. 3. The engine-driven air conditioner according to claim 1, wherein a sound insulating material is incorporated in the base frame. 4. The engine-driven air conditioner according to claim 1, wherein said cooling means includes a fan and a duct. 5. The engine-driven air conditioner according to claim 4, wherein the fan is directly connected to a drive shaft of the engine. 6. The air intake passage, wherein an air intake at one end is provided at an end of the base frame, and an air outlet at the other end is closer to an end of the base frame opposite to the air intake. The engine-driven air conditioner according to claim 1 or 2, wherein the engine-driven air conditioner is provided at a position (1). 7. The engine-driven air conditioner according to claim 1, wherein the air intake passage is formed in a meandering shape. 8. The cooling device according to claim 1, further comprising a fan case for housing a fan, wherein the fan case blows air toward the vibration isolator.
The engine-driven air conditioner according to 2 or 5. 9. The engine-driven air conditioner according to claim 8, wherein the fan case has a plurality of outlets.