JPH06249547A - Engine drive type heat pump apparatus - Google Patents

Abstract

PURPOSE:To stably support a combined body comprising an engine and a compressor on a stationary section, make vertical pipe portions of refrigerant pipes simple in constitution so as to facilitate piping thereof, reduce pressure loss of a refrigerant flowing through the refrigerant pipes and to extend a life of the refrigerant pipes. CONSTITUTION:A compressor 5 is joined to a side surface of an engine 4 to be on an axis 6 coaxial with a crankshaft of the engine 4. A suction side refrigerant pipe 20 and a discharge side refrigerant pipe 24, respectively, comprise vertical pipes 20a, 24a once extended upward from the compressor 5 and lateral pipes 20b, 24b extended substantially horizontally from upper ends of the vertical pipes 20a, 24a. Lower ends of the vertical pipes 20a, 24a are positioned near a center of gravity 17 of a combined body 8 which comprises the engine 4 and the compressor 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine-driven heat pump device, and more particularly to arrangement of a compressor with respect to an engine and structure of piping extending from the compressor.

[0002]

2. Description of the Related Art The engine-driven heat pump device described above includes
2. Description of the Related Art Conventionally, there is one disclosed in the specification of Japanese Patent Application No. 1-144148 and drawings.

According to this, the engine and the compressor for compressing the refrigerant driven by the engine are coupled to each other, and the coupled body is supported on the fixed side via the elastic body near the center of gravity thereof. Further, the refrigerant pipe for flowing the refrigerant is extended from the compressor, the extended end side thereof is supported by the fixed side of the same, and the vibration absorbing pipe is interposed in the middle portion of the refrigerant pipe of the same.

In this case, in order to effectively absorb the vibration transmitted from the engine to the refrigerant pipe, the refrigerant pipe is a vertical pipe extending from the compressor and a horizontal pipe extending from the extension end of the vertical pipe. And a vibration absorbing pipe is interposed in each of the vertical pipe and the horizontal pipe.

In the above structure, the compressor is attached to the upper part of the engine. For this reason, since there is a space for piping of the refrigerant pipe below this compressor and the horizontal pipe needs to be at a predetermined height in relation to other machines, the vertical pipe is temporarily removed from the compressor. After extending downward, it is folded back to form a U-shape.

[0006]

However, the above-mentioned conventional structure has the following problems.

That is, first, the compressor is attached to the upper part of the engine, and the center of gravity of the joint formed by them is high, which makes the support of the joint unstable.

Secondly, the vertically oriented tube is U-shaped,
The configuration is complicated. Further, this makes the piping complicated.

Thirdly, as described above, the vertically oriented pipe is U-shaped, and since the length of the pipe becomes longer and the number of bent portions increases, the pressure loss of the refrigerant flowing therethrough becomes large, resulting in unnecessary power loss. Occurs.

Fourth, when the engine is in operation, the combined body tries to vibrate about its center of gravity, and at this time, since the base end of the longitudinal pipe is away from the center of gravity of the combined body, the amplitude of the base end is increased. Is large, and this base end is prone to fatigue, which is a problem in terms of life.

[0011]

SUMMARY OF THE INVENTION The present invention has been made paying attention to the above circumstances, and makes it possible to stably support a combined body of an engine and a compressor with respect to a fixed side, and also to vertically arrange a refrigerant pipe. An object of the present invention is to simplify the structure of the pipe, to make the pipe easy, to reduce the pressure loss of the refrigerant flowing through the refrigerant pipe, and to improve the life of the refrigerant pipe.

[0012]

To achieve the above object, the present invention is characterized in that a compressor is connected to the side surface of the engine on the same axis as the crankshaft of the engine, and a refrigerant pipe is provided. A vertical pipe that extends upward from the compressor and a horizontal pipe that extends substantially horizontally from the upper end of the vertical pipe, and the lower end of the vertical pipe is a combination of an engine and a compressor. It is located near the center of gravity of.

[0013]

[Operation] The operation of the above configuration is as follows.

The terms in parentheses below correspond to the terms in the claims.

The compressor 5 is connected to the side surface of the engine 4 on the same axis 6 as the crankshaft of the engine 4.

Therefore, as compared with the case where the compressor 5 is conventionally mounted on the upper portion of the engine 4, the mounting position of the compressor 5 with respect to the engine 4 is lowered, and the center of gravity 17 of the combined body 8 due to these is also lowered. Become.

Further, the vertical pipes 20a, 24a for temporarily extending the suction side refrigerant pipe (refrigerant pipe) 20 and the discharge side refrigerant pipe (refrigerant pipe) 24 upward from the compressor 5, and the vertical pipes 20a and 24a.
a, 24a and horizontal pipes 20b, 24b extending substantially horizontally from the upper ends of the pipes 24a, 24a.

That is, since the compressor 5 is mounted at a low position as described above, the piping space for the vertically oriented pipes 20a and 24a is secured above the compressor 5. Also,
Since it is necessary to make the horizontal pipes 20b and 24b have a predetermined height in relation to other machines, the vertical pipes 20a and 24a are compressed as compared with the conventional U-shaped pipes as described above. It can be a straightforward simple shape extending upward from the machine 5.

Further, as described above, the vertically oriented tubes 20a,
Since 24a can be formed into a linear shape as compared with the conventional U-shape, the pressure loss of the refrigerant flowing therethrough can be reduced.

Moreover, the lower ends of the vertically oriented tubes 20a and 24a are connected to the center of gravity 17 of the combined body 8 of the engine 4 and the compressor 5.
Since it is located in the vicinity of the vertical direction pipes 20a and 24a, when the coupling body 8 vibrates around its center of gravity 17 during the operation of the engine 4, the amplitude of the lower ends of the vertical pipes 20a and 24a is suppressed to be small.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 in the drawing denotes a drive unit in the engine-driven heat pump device, and for convenience of explanation, the direction of the arrow Fr in the drawing is the front. The right and left described below means the direction toward the front.

The drive unit 1 has a casing 3 placed on the floor surface 2, and an engine 4 for driving gas using fuel is provided in the casing 3. A compressor 5 driven by the engine 4 is provided, and the compressor 5 has the same axis 6 as the crankshaft of the engine 4.
Above, it is joined to the left side of the engine 4.

The combined body 8 composed of the engine 4 and the compressor 5 is supported by a supporting member 10 on the bottom plate 9 in the casing 3.

The support 10 has a bracket plate 13 screwed to the upper surface of the engine 4 with bolts 11, and the bracket plate 13 extends to the left and right. on the other hand,
A pair of left and right columns 14 are erected on the bottom plate 9, and each column 14 is screwed onto the bottom plate 9 by bolts 15.

The bracket plate 13 is provided on the upper end of each of the columns 14 via a pair of front and rear rubber elastic members 16, 16, respectively.
The left and right ends of each are fastened by screws, whereby the combined body 8 is detachably supported by the support column 14 on the fixed side. In this case, in a side view (FIG. 1), the elastic bodies 16,
The center of gravity 17 of the coupling body 8 is located between 16, that is,
The combined body 8 is supported by the support column 14 near the center of gravity 17 thereof via the elastic bodies 16, 16.

The compressor 5 projects from the left side surface of the engine 4, and a refrigerant inlet port 18 and a refrigerant outlet port 19 are formed on the upper surface of the compressor 5 thus projecting.

A metallic suction side refrigerant pipe 20 for flowing a refrigerant is provided, one end of which is connected to the suction port 18 and the other end of which extends from the compressor 5. The suction side refrigerant pipe 20 has an extended end side. Two
1 is detachably supported on the front wall 22 of the casing 3, which is the fixed side. Further, the extension end side 21 is connected to another machine such as a heat exchanger by another refrigerant pipe 23.

On the other hand, one end is connected to the discharge port 19,
A discharge side refrigerant pipe 24 made of a metal for flowing a refrigerant, the other end of which extends from the compressor 5, is provided, and an extending end side 25 of the discharge side refrigerant pipe 24 is detachably attached to the front wall 22 of the casing 3 above. Supported by. Further, the extension end side 25 is connected to another device such as the heat exchanger described above by another refrigerant pipe 26.

The suction side refrigerant pipe 20 and the discharge side refrigerant pipe 24
A suction-side vibration absorption pipe 28 and a discharge-side vibration absorption pipe 29 are interposed in the respective intermediate portions of the suction-side vibration absorption pipe 2 and the suction-side vibration absorption pipe 2.
8 and the discharge-side vibration absorption tube 29 are both made of a bellows-shaped metal tube and have elasticity and flexibility.

The suction side refrigerant pipe 20 and the discharge side refrigerant pipe 24
Are the vertical pipes 20a and 24a that extend substantially vertically upward from the compressor 5, and the vertical pipes 20a and 24a.
a, 24a and horizontal pipes 20b, 24b extending substantially horizontally from the upper ends of the pipes 24a, 24a. These horizontal tubes 2
0b and 24b extend from the upper ends of the vertically oriented pipes 20a and 24a to the front right direction once in parallel with each other, then extend to the front side, and extend leftward in the vicinity of the front wall 22. Further, each of the extending end sides 21 and 25 thereof is open toward the front.

The suction side vibration absorbing pipe 28 is composed of a vertical absorbing pipe 28a interposed in the middle of the vertical pipe 20a and a horizontal absorbing pipe 28b interposed in the middle of the horizontal pipe 20b. Further, the discharge-side vibration absorption tube 29 is disposed in the middle of the vertical tube 24a.
a and a lateral absorption tube 29b interposed in the middle of the lateral tube 24b.

When the compressor 5 is driven by driving the engine 4, the refrigerant is compressed and circulates through the discharge side refrigerant pipe 24, the heat exchanger, etc., and the suction side refrigerant pipe 20, and is compressed again. It is compressed by the machine 5, and thereby air conditioning for cooling or heating is performed.

In this case, the vibration due to the driving of the engine 4 is absorbed to some extent by the elastic bodies 16, 16. Further, the horizontal vibration transmitted from the engine 4 to the suction side refrigerant pipe 20 and the discharge side refrigerant pipe 24 side is effectively absorbed by the vertical absorption pipes 28a and 29a, and the vertical vibration is particularly laterally transmitted. It is effectively absorbed by the absorption tubes 28b and 29b.

According to the above embodiment, the compressor 5 is connected to the side surface of the engine 4 on the same axis 6 as the crankshaft of the engine 4.

Therefore, as compared with the case where the compressor 5 is conventionally mounted on the upper portion of the engine 4, the mounting position of the compressor 5 on the engine 4 is lowered, and the center of gravity 17 of the combined body 8 due to these is lowered. Become.

Further, by mounting the compressor 5 at the low position as described above, the piping space for the vertically oriented pipes 20a, 24a is secured above the compressor 5. Further, since the horizontal tubes 20b and 24b need to have a predetermined height in relation to other machines, the vertical tubes 20a and 24b
a has a simple linear shape extending upward from the compressor 5, and the lateral pipes 20b and 24b extend from the upper ends thereof.

Moreover, the lower ends of the vertically oriented tubes 20a and 24a are located near the center of gravity 17. Therefore, when the combined body 8 vibrates around its center of gravity 17 during the operation of the engine 4, the amplitude of the lower ends of the vertically oriented tubes 20a, 24a is suppressed to a small value.

[0039]

According to the present invention, the compressor is connected to the side surface of the engine on the same axis as the crankshaft of the engine.

Therefore, as compared with the case where the compressor is conventionally mounted on the upper part of the engine, the mounting position of the compressor on the engine is lowered, and the center of gravity of the combined body is also lowered.

Therefore, when the combined body is supported on the fixed side in the vicinity of the center of gravity, this support can be stabilized.

Further, the refrigerant pipe is composed of a vertically oriented pipe that extends upward from the compressor, and a horizontally oriented pipe that extends substantially horizontally from the upper end of the vertically oriented pipe.

That is, since the compressor is mounted at a low position as described above, a piping space for a vertically oriented pipe is secured above the compressor. Also, since it is necessary to set the horizontal pipe to a predetermined height in relation to other machines, as described above, the vertical pipe is compared with the conventional U-shaped pipe,
It can be a straightforward simple shape extending upward from the compressor.

Therefore, the structure of the vertical pipe can be simplified and the piping can be easily performed.

Further, as described above, since the vertical pipe can be formed in a linear shape as compared with the conventional U-shape, the pressure loss of the refrigerant flowing through the vertical pipe is reduced and unnecessary power loss is suppressed. .

Moreover, since the lower end of the vertically oriented pipe is located near the center of gravity of the combined body of the engine and the compressor,
When the engine vibrates around its center of gravity during engine operation, the amplitude of the lower end of the longitudinal tube is kept small.

Therefore, fatigue of the above-mentioned vertically oriented pipe is suppressed, and the life is improved.

[Brief description of drawings]

FIG. 1 is an overall side view.

FIG. 2 is an overall plan view.

[Explanation of symbols]

 4 Engine 5 Compressor 6 Shaft Center 8 Combined Body 14 Strut (Fixed Side) 16 Elastic Body 17 Center of Gravity 20 Suction Side Refrigerant Pipe (Refrigerant Pipe) 20a Vertical Pipe 20b Horizontal Pipe 21 Extended End Side 24 Discharge Side Refrigerant Pipe (Refrigerant) 24a Vertical pipe 24b Horizontal pipe 25 Extension end side 28 Suction side vibration absorption pipe (vibration absorption pipe) 29 Discharge side vibration absorption pipe (vibration absorption pipe)

Claims (1)

[Claims] 1. An engine and a compressor for compressing a refrigerant, which is driven by the engine, are coupled to each other, and the coupled body is supported on a fixed side via an elastic body in the vicinity of the center of gravity of the engine. In the engine-driven heat pump device in which the refrigerant pipe for flowing the refrigerant is extended, the extended end side is supported on the fixed side on the same side, and the vibration absorption pipe is interposed in the middle part of the refrigerant pipe on the same side, The compressor is connected to the side surface of the engine on the same axis as the crankshaft, and the refrigerant pipe extends upward from the compressor, and a vertical pipe, and a horizontal direction from the upper end of the vertical pipe. It consists of a horizontal pipe extending to
An engine-driven heat pump device in which the lower end of the vertically oriented pipe is located near the center of gravity.