JPH0543258Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention places an engine immersed inside a heat storage tank containing a heat medium such as water, and stores the exhaust heat of the engine in the heat medium. The present invention relates to an engine-driven heat storage device, and particularly to improvements in its soundproof structure.

[Background technology and its problems] In recent years, devices that use engines as drive sources for heat pumps and generators have become known. For the purpose of reducing engine noise, the engine is immersed in a sealed heat storage tank containing a heat medium such as water, and is used as an engine drive heat storage device.

The conventional structure of such an engine-driven heat storage device is to provide a stepped portion on the upper edge of the heat storage tank, place a support ring on this step via a rubber tube-shaped steam sealing member, and place a vibration isolator on this support ring. Install the engine mounting plate through the
Auxiliary equipment such as a starter and muffler, and driven equipment such as a heat pump compressor are mounted on this mounting plate, and a soundproof cover is attached to cover these auxiliary equipment.

However, engines need to communicate with the outside air for intake, exhaust, and heat dissipation.
There is a problem that the soundproofing performance cannot be satisfied, and it is necessary to lead out the engine lead-out lines such as fuel supply pipes for engine operation, cords for electrical components, etc. from inside the soundproof cover to the outside.
We were struggling with measures to prevent sound seals. Furthermore, even if a vibration isolating device is used, vibrations from the mounting plate may be transmitted to the heat storage tank beyond its vibration isolation performance. There was a problem in that it vibrated and emitted non-negligible noise to the outside.

[Purpose of the invention] The purpose of the invention is to effectively prevent noise from the engine mounting plate side, and
It is an object of the present invention to provide an engine-driven heat storage device that can suppress leakage of noise caused by drawing out lead wires and pipes as much as possible, and can also suppress noise from the surface of a heat storage tank.

[Means and effects for solving the problem] The present invention forms at least one of an air intake duct and an exhaust duct partitioned using a sound absorbing material such as glass wool in a soundproof cover that covers a mounting plate. Engine outgoing lines such as fuel supply pipes and electrical wiring are drawn out through the duct, thereby forming a sound absorbing duct in the cover itself, ensuring a sound deadening effect, and connecting outgoing outgoing lines with the outside. Allows for withdrawal. Furthermore, by supporting the mounting plate with a support frame made of linear structural materials and forming the heat storage tank with a flexible bag, the heat storage tank suppresses vibration propagation from the mounting plate and prevents surface noise. Moreover, in the support frame, even if vibrations from the mounting plate are transmitted, large noises due to planar vibrations are not generated to achieve the above object.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

In the figure, an engine 1 is fixed to a mounting plate 2, and brackets 3 are attached to the four corners of the mounting plate 2. These brackets 3 are supported by a support frame 5 via a vibration isolator 4 made of rubber and having a bolt installed in its center. The support frame 5 has a rectangular parallelepiped frame structure by welding shaped steel such as L-shaped steel, is made of linear structural members without planar structural members, and is fixed on a base 6.

The upper end of a heat storage tank 7 is fixed to the mounting plate 2, and the heat storage tank 7 is made of a synthetic resin flexible bag with heat insulating material, and the bottom part is placed directly on the base 6. . A heat medium 8 such as water is stored inside the heat storage tank 7 , and the engine 1 is immersed in this heat medium 8 so that exhaust heat from driving the engine 1 is stored in the fuel 8 . . Further, on the mounting plate 2, a carburetor 9 with an air filter connected to the intake side of the engine 1, and a carburetor 9 with an air filter connected to the intake side of the engine 1,
Engine accessories such as a muffler 11 and a starter 12 connected to the exhaust pipe 10 of the engine 1 are attached, and a heat pump compressor 13 as a driven device driven by the engine 1 is also attached.

A soundproof cover 14 is provided on the upper part of the support frame 5.
is attached via a vibration-proof rubber washer (not shown), etc., and this cover 14 covers the auxiliary equipment and compressor 13 on the mounting plate 2 to prevent noise radiation from the mounting plate 2 side. . Further, on the inner surface of the cover 14, a heat-insulating and sound-absorbing member 15 made of glass wool or other heat-insulating and sound-absorbing material is attached, and the vaporizer 9 is partitioned by a part of the heat-insulating and sound-absorbing member 15.
A bent air intake duct 16 is provided on the side containing the air intake duct. At this time, the downstream exhaust pipe 17 of the muffler 11 penetrates the soundproof cover 14 and projects to the outside.

A fuel supply pipe 18 is connected to the carburetor 9, and this pipe 18 is provided with a pressure regulator 19 and a solenoid valve 20, so that fuel is supplied from a fuel tank (not shown). Further, an electrical equipment wire 21 is connected to the starter 12, and the electrical equipment wire 21 and engine extraction lines and tubes such as the fuel supply pipe 18 are led out through an air intake duct 16.

A decorative outer panel 22 is attached to the entire circumference of the side surface of the support frame 5 via anti-vibration rubber washers (not shown), and the heat-insulating and sound-absorbing panels are installed inside the support frame 5 and outside the heat storage tank 7. Part 1
A heat insulating and sound absorbing member 23 similar to 5 is provided.

In addition, as shown by the chain line in FIG. 2, the heat storage tank 7 is provided with a heating or hot water supply pipe 24 extending therethrough as required. Thereby, the heat medium 8 can be circulated and used directly or indirectly depending on the purpose.

In such a configuration, when the engine 1 is driven, the heat accompanying combustion is directly transferred to the heat medium 8 through the engine wall surface, and also when the combustion exhaust gas is discharged through the exhaust pipe 10. The heat is transferred to the heat medium 8 and stored. Further, the driving force of the engine 1 drives a compressor 13 for a heat pump and is used for heating and cooling inside the house.

On the other hand, vibrations accompanying the driving of the engine 1 are transmitted to the mounting plate 2, but since the plate 2 is supported by the support frame 5 made of linear structural material via the vibration isolator 4, If the rigidity of the vibration isolator 5 is above a certain level, most of the vibration will be absorbed by the vibration isolator 4 and will not be transmitted to the frame 5, and the frame 5 will not generate vibration noise. Further, the noise directed upward from the mounting plate 2 is transmitted through the soundproof cover 1 having the heat insulating and sound absorbing member 15.
4, and is not released to the outside. On this occasion,
Since the fuel supply pipe 18 and electrical wiring 21 are also drawn out through the duct 16, no noise is emitted by the drawing out of these pipes 18 and the like. Furthermore, the vibrations transmitted from the engine 1 to the heat medium 8 are attenuated by the heat medium 8, and are further attenuated by the heat storage tank 7 made of a flexible bag, so that they do not affect the outside.

According to the present invention as described above, the upper part of the engine 1 is covered with a soundproof cover, and the engine lead-out lines such as the fuel supply pipe 18 are drawn out through the air intake duct 16 partitioned by the heat-insulating sound-absorbing member 15. This makes it possible to achieve extremely good soundproofing measures.
At this time, since the duct 16 is bent, the sound absorption and attenuation effects can be further exerted. In addition, since the engine 1 is supported by the support frame 5 made of linear structural material via the vibration isolator 4, there are no members that vibrate in plane as the engine 1 is driven, so the vibration noise of the entire device can be minimized. can be suppressed to Furthermore, even if some vibration is transmitted to the support frame 5 beyond the vibration isolation range of the vibration isolator 4 as the rotational speed of the engine 1 changes, since the surface area of the support frame 5 is small, the vibration surface pressure will be transferred to the outside. The proportion emitted is small and does not cause noise. In addition, when finishing the exterior of the device, a decorative panel or the like is usually attached to the outside, but in this embodiment, the outer panel 2 is attached to the support frame 5.
2, and by insulating only the mounting portion from vibration, the vibration noise of the entire device can be effectively suppressed. Furthermore, since the heat storage tank 7 is supported independently from the support frame 5 and is constructed from a flexible bag, noise reduction can also be achieved by this, and the heat medium 8 accommodated in the heat storage tank 7 Since most of the weight of the support frame 5 is directly supported by the base 6, the weight burden on the support frame 5 can be reduced, and the support frame 5 can be made of a thin member, making it possible to reduce weight and cost. In addition, a support frame 5 that supports the load, a soundproof cover 14 that covers the device,
Since the outer plate 22 and the heat storage tank 7 that retains heat can be manufactured and installed independently, manufacturing becomes easy and costs can be reduced from this point of view as well.

In implementing the present invention, the structure of the present invention is not limited to the structure of the above-mentioned embodiments, and various modifications are possible, and modifications within the range that can achieve the purpose of the present invention are not included in the present invention. It is something that can be done.

For example, instead of the air intake duct 16,
Alternatively, in addition to the duct 16, an exhaust duct is provided to surround the muffler 11 and the downstream exhaust pipe 17,
Engine draw-out pipes such as the fuel supply pipe 18 may be drawn out through this exhaust duct. At this time, if the exhaust duct is bent like the air intake duct 16, the effect of preventing noise leakage can be more effectively achieved. Further, the structure of the support frame 5 is not limited to the rectangular parallelepiped frame shape, but may be simply four pillars provided at the four corners of the heat storage tank 7, or two "E"-shaped pillars provided on opposite sides of the heat storage tank 7. Other structures may also be used. Furthermore, the material of the support frame 5 is not limited to shaped steel, but may also be a bar or the like, and the material is not limited to iron. Furthermore, the compressor 1 as a driven device
3 may be a generator or the like.

[Effects of the Invention] As described above, the present invention has the effect that the vibration noise caused by engine driving can be extremely reduced.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view of its schematic structure. DESCRIPTION OF SYMBOLS 1...Engine, 2...Mounting plate, 4...Vibration isolator, 5...Support frame, 7...
... Heat storage tank, 8 ... Heat medium, 13 ... Compressor as driven equipment, 14 ... Soundproof cover, 1
5... Heat insulating sound absorbing member, 18, 21... Fuel supply pipe and electrical equipment wire as outgoing line pipes for the engine.

Claims (1)

[Claims for Utility Model Registration] (1) An engine-driven heat storage device in which an engine is immersed in a heat storage tank containing a heat medium such as water, and exhaust heat from the engine is used to store heat in the heat medium. In addition to providing a mounting plate for assembling the engine, a soundproof cover is provided on the opposite side of the mounting plate from the side on which the engine is mounted to cover the auxiliary equipment of the engine, and a soundproof cover is provided within the soundproof cover. Forming at least one of an air intake duct and an exhaust duct partitioned by sound absorbing material, disposing engine outgoing lines and pipes such as fuel pipes and electrical wiring within this duct, and connecting the mounting plate to the heat storage tank. An engine-driven heat storage device, characterized in that the heat storage tank is supported by a support frame made of a linear structural member provided separately, and is constructed of a flexible bag whose upper opening periphery is connected to the mounting plate. (2) Claim 1 is characterized in that a vibration isolating device is interposed between the mounting plate and the support frame, and the soundproof cover is formed to cover the entire mounting plate. An engine-driven heat storage device.