JPS6321751Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine-driven heat pump.

In conventional engine-driven heat pumps, the configuration described in the following [] or [] is generally used as a means to suppress noise and vibration generated by the driving of the engine and the refrigerant compressor linked thereto. Measures are being taken to do so.

[] A sound absorbing material is attached to the entire inner surface of a case that covers the entire heat pump including an engine, a refrigerant compressor, a plurality of refrigerant heat exchangers, etc., and a sound absorbing material is attached between the bottom of the case and the engine and the compressor. A vibration isolating mechanism is interposed, and the refrigerant pipe of the compressor is led out in a direction perpendicular to the direction of the crankshaft of the engine.

[] A sealed case equipped with sound-absorbing material is provided inside the heat pump body, and inside this sealed case,
The engine and the refrigerant compressor are attached together with their accessories via a vibration isolating mechanism, and the refrigerant pipes of the compressor are led out in a direction perpendicular to the direction of the crankshaft of the engine.

In the former case, the area to be modified into a soundproof structure is very large, which not only increases the size and weight of the entire device, but also tends to increase the cost.
In the case of the latter [], not only the engine and compressor but also their auxiliary equipment are installed in a sealed case, so when performing daily inspections and adjustments of these auxiliary equipment, the sealed case must be disassembled and the auxiliary equipment must be disassembled. Since it must be reassembled after inspection and adjustment, the inspection and adjustment work requires a great deal of effort and time.

Moreover, in any of these cases, the comparatively large vibrations generated by the driving of the engine and compressor repeatedly act on the refrigerant pipes, so the refrigerant pipes are easily deformed and damaged in a short period of time, which is a disadvantage in terms of durability. It was hot.

An object of the present invention is to reasonably improve the above-mentioned conventional drawbacks.

The characteristic configuration of the engine-driven heat pump according to the present invention, which was taken to achieve this purpose, is that the engine and the refrigerant compressor linked to the engine are housed in a sealed case equipped with a sound-absorbing material and equipped with a vibration isolation mechanism. Among these two accessory devices, the one that requires inspection and adjustment more frequently is installed outside the sealed case, and the refrigerant pipe connected to the compressor is connected to the engine crankshaft. The refrigerant pipe is led out along or almost along the direction, and the leading end side portion of the refrigerant pipe is held by the side plate of the sealed case.

The effects of the present invention with the above configuration are as follows.

(b) Since the engine, refrigerant compressor, and some of their auxiliary equipment are vibration-proofly supported in a sealed case with sound-absorbing material, the equipment is less expensive than if the case covering the entire heat pump was modified to have a soundproof structure. The overall structure can be made compact and lightweight, and can be constructed economically.

(b) Since the equipment that requires frequent inspection and adjustment is installed outside the sealed case, it is not necessary to disassemble and adjust the sealed case each time as in the conventional [ ].
No assembly is required, and such inspection and adjustment work can be performed quickly and easily.

(c) Of the vibrations generated with engine drive,
Focusing on the fact that the vibration along the rotational direction of the crankshaft is the largest and, conversely, the vibration along the axial direction of the crankshaft is the smallest, the refrigerant pipe connected to the compressor is moved in the direction of the crankshaft. By deriving the refrigerant along the same line, it is possible to reduce the stress that repeatedly acts on the refrigerant pipe as much as possible compared to the conventional method, and it has become possible to suppress deformation and damage of the refrigerant pipe due to engine vibration.

Hereinafter, embodiments of the configuration of the present invention will be described based on the drawings.

Engine 1 and refrigerant compressor 2 linked to it
Also, a catalyst 3 that also serves as a primary muffler to burn unburned gas in the engine exhaust, and this catalyst 3
An exhaust heat exchanger 4 for exchanging heat between the engine exhaust heated to high temperature and water is made into a unit, and this unit is installed in a cubic-shaped sealed case 5 via a vibration isolation mechanism 6, and the Case 5
A sound absorbing material 7 is pasted on the inner surface of the housing.

On the outer surface of one side plate 5a of the sealed case 5 that faces in a direction orthogonal to the crankshaft direction a of the engine 1, there are provided a side plate 5a for inspection, adjustment, etc. of the attached equipment of the engine 1 and the compressor 2. In addition to installing the carburetor 8, which is frequently required, the side plate 5a to which the carburetor 8 is installed is used to supply water to the engine 1.
a connection port 9a of a flexible pipe 9 which is made to flow between the water jacket and the exhaust heat exchanger 4;
8b, connection port 10 for flexible exhaust pipe 10
a, a connection port 11a for a flexible engine oil supply pipe 11, and electrical system connectors 12, 12 necessary for engine operation.

A flexible refrigerant pipe 13 connected to the compressor 2 is led out along or substantially along the crank axis direction a of the engine 1, and a connection port 13a is connected to the leading end side portion of the refrigerant pipe 13. , 13b are provided on one side plate 5b of the sealed case 5 facing each other in the direction a of the crankshaft of the engine 1.

The sealed case 5 is composed of removable case parts 5A and 5B that are divided into two parts by a vertically inclined surface, of which the lower case part 5B is provided with the above-mentioned unit and each connection port. .

In order to easily attach and detach the engine/compressor unit configured as described above to and from the heat pump body, a heat pump body is attached to the upper case portion 5A or the lower case portion 5B of the sealed case 5. A rail is provided along which the unit can be slid to the installed position along the rail, and when the unit is positioned at the installed position, the piping and electrical connections between the unit and the heat pump body are removed. The configuration may be such that the wiring is automatically connected.

[Brief description of the drawings]

The drawings show an embodiment of the engine-driven heat pump according to the present invention, in which FIG. 1 is a front view, FIG. 2 is a partially cutaway side view, and FIG. 3 is a cross-sectional plan view. 1...Engine, 2...Refrigerant compressor, 5...
Sealed case, 5b...Side plate, 6...Vibration isolation mechanism, 7
...Sound absorbing material, 8...Attached equipment, 13...Refrigerant pipe.

Claims (1)

[Claims for Utility Model Registration] An engine 1 and a refrigerant compressor 2 interlocked with the engine 1 are installed in a sealed case 5 equipped with a sound absorbing material 7 via a vibration isolating mechanism 6.
Among the accessory devices 2, the device 8 that requires frequent inspection and adjustment is installed outside the sealed case 5, and the refrigerant pipe 13 connected to the compressor 2 is connected to the crankshaft direction of the engine 1. An engine-driven heat pump in which the refrigerant pipe 13 is led out along or approximately along the same line, and the leading end side portion of the refrigerant pipe 13 is held by the side plate 5b of the sealed case 5. The engine-driven heat pump according to claim 1, wherein the sealed case 5 is divided into two by a vertically inclined surface. The engine-driven heat pump according to claim 1 or 2, wherein the exterior accessory device 8 is a vaporizer.