JPH04363526A - Outdoor unit for engine-driven type air-conditioner - Google Patents

Abstract

PURPOSE:To decrease an installation space for an outdoor unit for an engine- driven type air-conditioner having a two-suction type compressor. CONSTITUTION:Two refrigerant compression parts 2A and 2B of a compressor 2 are vertically arranged in a state that axes are horizontally extended. The compressor 2 is arranged to the side of an engine 1 in a state that it is located in parallel to a crank shaft 1a of the engine 1. The input shaft and a crank shaft 1a of the compressor 2 are arranged on the same side and intercoupled through a power transmission device 20. The width of the compressor 2 is reduced by an amount equivalent to that of one refrigerant compression part. Since the total width of the outdoor unit can be decreased, this constitution also reduces installation space.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit for an engine-driven air conditioner equipped with a two-suction type compressor and an engine for driving the compressor, and more particularly to the structure of the compressor.

0002

[Prior Art] Conventionally, air conditioners have used a two-suction type compressor with two refrigerant compression sections as a refrigerant compression compressor, and this compressor was driven by a single engine. There is something I did. In this type of air conditioner, the compressor, engine, etc. are housed in an outer case and installed outdoors, such as on a rooftop, as an outdoor unit. Of the two refrigerant compression sections of the compressor, the suction side of one refrigerant compression section is connected to a refrigerant circuit connected to a hot water heat exchanger that uses engine cooling water, and the suction side of the other refrigerant compression section is connected to a refrigerant circuit connected to a hot water heat exchanger that uses engine cooling water. The side was connected to a refrigerant circuit connected to an air heat exchanger using outside air.

[0003] The compressor has two refrigerant compression sections arranged side by side with their axes parallel to each other and at the same height. They were placed so that they were facing each other. The two input shafts of the compressor and one output shaft of the engine are connected to two electromagnetic clutches whose output sides are respectively coupled to the input shaft, and to the input sides of these electromagnetic clutches via gears. In addition, the engine output shaft was connected to the engine through a power transmission device including one connecting shaft connected to the engine output shaft. That is, the rotation of the engine output shaft is transmitted to each refrigerant compression section via the connecting shaft of the power transmission device, gears, and electromagnetic clutches. By adopting such a power transmission structure, for example, during low-load heating operation, heating capacity can be reduced by releasing one of the two electromagnetic clutches and stopping one of the refrigerant compression sections.

0004

[Problems to be Solved by the Invention] However, the conventional outdoor unit configured as described above has a problem in that it requires a large installation space. In particular, when installing multiple devices side by side on the roof of a building, if the rooftop is narrow, the number of devices installed will be limited. This is because the two refrigerant compression sections of the compressor are arranged laterally (horizontally), and the width of the compressor itself is large.

[0005]

[Means for Solving the Problems] An outdoor unit for an engine-driven air conditioner according to the present invention has two refrigerant compression sections of a compressor arranged one above the other with their axes horizontal, and the compressor is connected to the engine. It is arranged on the side of the engine parallel to the output shaft, and the input shaft of the compressor and the engine output shaft are connected on the same side via a power transmission member.

[0006]

[Operation] The width of the compressor is reduced by one refrigerant compression section.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 8. FIG. 1 is a plan view showing an engine and a compressor of an engine-driven air conditioner outdoor unit according to the present invention, FIG. 2 is a front view, and FIG. 3 is a side view.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is a cross-sectional view showing the main parts of the compressor.
-V line sectional view. 6 is a sectional view taken along the line VI-VI in FIG. 5, FIG. 7 is a sectional view taken along the line VII-VII in FIG.
FIG. 8 is a side view of the compressor. In these figures, 1
2 is an engine, and 2 is a compressor, and these are connected via a power transmission device 20, which will be described later. Further, the engine 1 and the compressor 2 are housed and fixed together with an outdoor heat exchanger, a fan, etc. in an outdoor unit main body (not shown) that constitutes an outer case.

The engine 1 is configured to be driven by gas fuel such as city gas or propane gas, and is installed with the crankshaft 1a oriented horizontally. The crankshaft 1a protrudes forward of the engine 1 (to the right in FIG. 1), and its protruding end is connected to a power transmission device 20, which will be described later.

The compressor 2 includes two refrigerant compression sections 2A and 2B positioned above and below, as shown in FIGS. 5 to 8, and is installed in close contact with the side of the engine 1. The upper and lower refrigerant compression units 2A and 2B have horizontal input shafts (not shown) parallel to the crankshaft 1a, and compress the refrigerant sucked in from the suction ports 3 and 4 into high-temperature and high-pressure gas. After that, the liquid is discharged from a common discharge port 5 provided at the top. In this embodiment, two refrigerant compression sections 2
The suction port 3 of the upper refrigerant compression section 2A among A and 2B is
It is connected to a refrigerant circuit to which an air heat exchanger (not shown) that uses outside air is connected, and the suction port 4 of the lower refrigerant compression section 2B is connected to a hot water heat exchanger (not shown) that uses engine cooling water. Connected to the connected refrigerant circuit.

Reference numerals 6 and 7 denote positive displacement compressor bodies of the respective refrigerant compression sections; 8 and 9 denote compressed gas chambers provided adjacent to the compressor bodies 6 and 7; The refrigerant gas is discharged through the refrigerant outlet portion 6a that opens on the side wall of the compressor main body 6, 7.
, 7a to the compressed gas chambers 8, 9, from where it is discharged through the discharge port 5. The upper compressed gas chamber 8 and the lower compressed gas chamber 9 are communicated via a gas passage 10 and a lubricating oil passage 11, and the refrigerant gas sent to the lower compressed gas chamber 9 is passed through these passages. It is led through the upper compressed gas chamber 8. The lubricating oil passage 11 is formed so as to extend upward from the bottom of the upper compressed gas chamber 8, and
The upper opening edge is positioned above the bottom surface of the compressed gas chamber 8 by a predetermined dimension. Note that this lubricating oil passage 11
The upper opening edge is positioned below the upper opening edge of the gas passage 10. 12 is lubricating oil stored in the upper and lower compressed gas chambers 8 and 9, 13 is a lubricating oil suction port, and each compressor main body 6 and 7 is structured to suck the lubricating oil 12 from this lubricating oil suction port 13. ing. In addition, lubricating oil 12
is sent to the compressed gas chambers 8 and 9 together with the refrigerant gas and is stored there, but a part of it is sent to the discharge port 5 along with the refrigerant gas.
The refrigerant is discharged from the refrigerant circuit and returned to the suction ports 3 and 4. When the above-described lubricating oil storage structure is adopted, the lubricating oil 12 does not accumulate in the upper compressed gas chamber 8 more than a certain amount, and the rest is dripped into the lower compressed gas chamber 9, so that the upper refrigerant is compressed. When the lower refrigerant compression section 2A is operated constantly and the lower refrigerant compression section 2B is operated according to the load, the lower refrigerant compression section 2
This can prevent B from running out of lubricant.

14 and 15 are the upper and lower refrigerant compression sections 2A,
These electromagnetic clutches 14 and 15 are attached to the front part of the compressor 2 (the right side in FIG. 1) for each refrigerant compression section, and their output side is The input shafts of the compressor bodies 6 and 7 are connected to a power transmission device 20 on the input side.

The power transmission device 20 includes the crankshaft 1a of the engine 1 and the electromagnetic clutches 14 and 15 on the input side of the compressor 2.
It has a structure in which the two are connected via a plurality of spur gears whose axes are parallel to each other, and is mounted on the shaft end side of the crankshaft 1a of the engine 1. Reference numeral 21 indicates an input gear that is coupled to the crankshaft 1a, 22 indicates a first intermediate gear that meshes with and drives the input gear 21, and 23 and 24 indicate output gears that are coupled to the input sides of electromagnetic clutches 14 and 15, respectively. These output gears 23 and 24 are configured to be driven by a second intermediate gear 25 that meshes with the first intermediate gear 22. That is, the rotation of the crankshaft 1a is caused by the rotation of the input gear 21.
, the first intermediate gear 22, the second intermediate gear 25, and the output gears 23, 24 to the electromagnetic clutches 14, 15, and the input sides of both electromagnetic clutches 14, 15 rotate simultaneously. In addition, 26 and 27 are the gears 21 to 2.
The power transmission main body and cover support the engine 5 via bearings, and these are bolted to the engine 1. By using this power transmission device 20, the engine 1 and the compressor 2 are connected on the same side.

In the engine-driven air conditioner outdoor unit equipped with the compressor 2 configured as described above, the power of the engine 1 is compressed from the crankshaft 1a via the power transmission device 20 and the electromagnetic clutches 14 and 15. This will be communicated to machine 2. When both the electromagnetic clutches 14 and 15 are connected, the two refrigerant compression units 2A and 2B are operated to maximize the heating and cooling capacity, and by releasing one of the electromagnetic clutches, the heating and cooling capacity is reduced. Can be done.

[0014] Therefore, in the compressor 2 in which the refrigerant compression sections 2A and 2B are arranged above and below, the vertical dimension becomes large and the width dimension becomes smaller by one refrigerant compression section. Therefore, the width dimension when the compressor 2 is attached to the engine 1 is also reduced.

In this embodiment, the lubricating oil 12 overflowing from the upper compressed gas chamber 8 is dripped into the lower compressed gas chamber 9, but as shown in FIGS. It is also possible to have a structure in which oil is pumped from the gas chamber 9 to the upper compressed gas chamber 8 using an oil pump. FIG. 9 is a sectional view showing another example of the lubricating oil storage structure, and FIG. 10 is a sectional view taken along the line XX in FIG. In these figures, the same or equivalent members as those explained in FIGS. 5 to 8 are given the same reference numerals, and detailed explanations will be omitted. In these figures, 31 is an oil pump, 32 is an oil suction pipe of this oil pump 31, and 33 is an oil discharge pipe. 34 is a control device for controlling the operation of the oil pump 31, and this control device 34 is connected to the lower compressed gas chamber 9.
The oil pump 31 is operated by a signal from an oil level sensor 35 installed at the bottom of the tank. That is, the lubricating oil 12 in the lower compressed gas chamber 9
When the amount exceeds a predetermined amount, the lubricating oil 12 is pumped into the upper compressed gas chamber 8.

[0016]

As explained above, in the outdoor unit for an engine-driven air conditioner according to the present invention, the two refrigerant compression sections of the compressor are arranged vertically with their axes horizontal, and the compressor is The width of the compressor is the width of one refrigerant compression section because the compressor input shaft and engine output shaft are connected on the same side via a power transmission member. becomes smaller. Therefore, since the overall width of the outdoor unit can be reduced, the installation space may be relatively narrow. Therefore, even when multiple outdoor units are installed side by side on the roof of a building, more units can be installed.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an engine and a compressor of an engine-driven outdoor unit for an air conditioner according to the present invention.

FIG. 2 is a front view showing the engine and compressor of the engine-driven outdoor unit for an air conditioner according to the present invention.

FIG. 3 is a side view showing the engine and compressor of the engine-driven outdoor unit for an air conditioner according to the present invention.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a cross-sectional view showing a main part of the compressor, which is a cross-sectional view taken along the line V-V in FIG. 1;

6 is a sectional view taken along the line VI-VI in FIG. 5. FIG.

7 is a sectional view taken along the line VII-VII in FIG. 5. FIG.

FIG. 8 is a side view of the compressor.

FIG. 9 is a sectional view showing another example of a lubricating oil storage structure.

FIG. 10 is a sectional view taken along line XX in FIG. 9;

[Explanation of symbols]

1 Engine 1a Crankshaft 2 Compressor 2A Refrigerant compression section 2B Refrigerant compression section 6 Compressor body 7 Compressor body 8 Compressed gas chamber 9 Compressed gas chamber 14 Electromagnetic clutch 15 Electromagnetic clutch 20 Power transmission device

Claims (1)

[Claims] Claims: 1. An outdoor unit for an engine-driven air conditioner comprising a two-suction type compressor provided with two lines of refrigerant compression sections, and an engine that drives the compressor; The refrigerant compression units are arranged vertically with their axes horizontal, and the compressors are placed parallel to the engine output shaft on the side of the engine, and the input shaft of the compressor and the engine output shaft are on the same side to generate power. An outdoor unit for an engine-driven air conditioner, characterized in that the unit is connected via a transmission member.