JPS6335178Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an internal combustion engine-driven heat storage system that utilizes engine drive exhaust heat to store heat in a heat medium such as water, and particularly relates to a vibration isolation structure that blocks the transmission of vibrations from the engine. .

In some systems that use an engine as a drive source, the engine is placed inside a heat storage tank filled with a heat medium such as water, in order to prevent engine noise and to effectively utilize engine drive exhaust heat and exhaust heat. Soak,
This solves engine noise and also
2. Description of the Related Art A heat storage system is known in which exhaust heat from an engine is stored in a heat medium and used for heating, hot water supply, etc.

In this type of heat storage system, vibrations caused by the engine drive are transmitted to the heat storage tank, and the entire heat storage tank may become a source of noise due to resonance, etc. Therefore, the system also serves as a support function for the engine, and the vibrations from the engine to the heat storage tank are transmitted to the heat storage tank. The heat storage tank is required to have a sealed structure in order to block the transmission of heat and to prevent engine noise and heat medium vapor leakage.

However, in conventional heat storage systems, the engine is supported through anti-vibration rubber at several points in the heat storage tank, but in general, normal anti-vibration rubber is supported by reducing the spring constant in order to increase the anti-vibration effect. It has been extremely difficult to satisfy all of the above requirements, as the function is impaired and, conversely, if the spring constant is increased to maintain the supporting function, the vibration damping effect is impaired. On the other hand, if a heavy vibration damping plate or ferrite plate is used instead of the vibration isolating rubber, there is a drawback that the sealing effect is impaired due to lack of flexibility.

The purpose of the present invention is to provide a vibration-proof structure for an internal combustion engine-driven heat storage system that efficiently absorbs the transmission of vibrations from the internal combustion engine while maintaining the supporting function of the internal combustion engine such as an engine and the sealing effect of the heat storage tank. There is a particular thing.

Therefore, the present invention provides an internal combustion engine-driven heat storage system in which an internal combustion engine is installed inside a heat storage tank filled with a heat medium such as water, and the drive exhaust heat of this internal combustion engine is used to store heat in the heat medium. The above object is achieved by supporting the internal combustion engine around the entire circumference of the heat storage tank via a hollow ring-shaped vibration absorbing material. In short, by supporting the load of the internal combustion engine around the entire circumference of the heat storage tank via the hollow ring-shaped vibration absorbing material, the load of the internal combustion engine becomes an evenly distributed load and is not concentrated, so the spring constant of the vibration absorbing material can be reduced. Even if it is made smaller, the support function is not impaired, and therefore, the transmission of vibrations from the internal combustion engine can be effectively absorbed while maintaining the support function and sealing effect.

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

1 and 2 show a first embodiment of the invention. In FIG. 1, a heat storage tank 1 includes a cylindrical can body 2 that is filled with a heat medium such as water and has a heat insulating material (not shown) on the wall surface, and is detachably attached to an opening at the upper end of the can body 2. It is composed of a lid body 3 that is fitted.

The upper peripheral wall of the can body 2 is bent outward into a horizontal plane 4, and then bent upward into a vertical plane 5.
It is bent into a shape. An annular support ring 7 is provided around the entire circumference of the horizontal surface 4 via a hollow ring-shaped vibration absorbing material 6.
is placed. The vibration absorbing material 6 has a ring-shaped hollow tube made of elastic rubber, for example, a bicycle tube shape, and absorbs vibrations acting on the support ring 7 by air injected inside. . Moreover, the support ring 7 is, as shown in FIG.
Four connecting plates 9 are integrally formed at 90 degree angle positions on the inner peripheral surface of the ring body 8 placed along the vibration absorbing material 6. The outer ends of four support arms 11, which project radially from a mounting plate 10 as an attachment plate via bolts 16, are connected to these connection plates 9 via pins 12. mounting plate 10
is formed in the shape of a floating boat that floats on the surface of the heating medium, and has an engine 13 as an internal combustion engine, which is completely immersed in the heating medium, on the bottom, and is driven by the engine 13 on the top. heat pump 30
It is equipped with a compressor 14, an oil filter 15, etc. Therefore, the load exerted on the support arm 11 and the support ring 7 due to the loads of the engine 13, compressor 14, etc. is reduced by the buoyant force generated on the mounting plate 10.

One end of the engine 13 is connected to the other end of an intake pipe 22 which protrudes to the outside of the heat storage tank 1 through a lip seal 21 provided on the lid 3, and one end is connected to the exhaust side of the engine 13. is connected to the other end of an exhaust pipe 24 which protrudes to the outside of the heat storage tank 1 through a lip seal 23 provided on the lid 3 and whose part is immersed in the heat medium. exhaust pipe 24
An exhaust gas heat exchanger 25 is installed in the middle of the engine 13 to release exhaust heat from the engine 13 into the heat medium in the heat storage tank 1.
and a drain pot 27 which leads the drain pipe 26 to the outside of the can body 2.
As a result, when the engine 13 is driven, the exhaust heat generated from the engine 13 is directly absorbed by the heat medium,
At the same time, the high temperature exhaust gas generated is absorbed by the heat medium while passing through the exhaust gas heat exchanger 25, the drain pot 27, and the exhaust pipe 24 in the heat medium, becomes low temperature, and is discharged to the outside.

Further, in the heat pump 30 using the compressor 14, the refrigerant compressed by the compressor 14 is liquefied in a heat exchanger 31 installed in the lower layer of the heat storage tank 1, that is, below the engine 13, and then passes through an expansion valve 32. The air enters the external evaporator 33, is vaporized and expanded there, and then returns to the compressor 14. The external heat source for the external evaporator 33 may be air or well water, but if there is a need for cooling on the load side of the house, the water can be circulated through a suitable fan coil unit (not shown) and connected to the return pipe 34. do it.

On the other hand, the lower peripheral wall of the lid body 3 is bent outward into a horizontal plane 41 so as to rest on the support ring 7, and then bent further downward to the outside of the vertical surface 5 of the can body 2. It is bent into a vertical plane 42 so as to fit loosely into the vertical plane 42. Furthermore, an inspection window 43 is formed at the center of the lid body 3, that is, at a position corresponding to the compressor 14 and the oil filter 15.
3 is equipped with an inspection hatch 44 that can be opened and closed. This facilitates inspection, replacement, etc. of the oil filter 15, which is frequently maintained.

Next, the operation of this embodiment will be explained. Now, when the heat pump 30 is operated by the engine 13, the exhaust heat generated from the engine 13 is directly absorbed by the heat medium, and the high temperature exhaust gas generated at the same time is transferred to the exhaust gas heat exchanger 25, drain pot 27, and exhaust pipe 24. As a result of heat being absorbed by the heat medium while being discharged to the outside through the heat storage tank 1, the temperature of the heat medium in the heat storage tank 1 is increased.

On the other hand, when the refrigerant compressed and made high-pressure by the compressor 14 is liquefied in the heat exchanger 31 immersed in the lower part of the engine 13, it imparts condensation heat to the surrounding heating medium to raise its temperature. After that, expand the expansion valve 3.
2, in the external evaporator 33, the gas is vaporized and expanded by taking heat from the outside, and returns to the compressor 14 again.
As a result, the temperature of the heat medium in the heat storage tank 1 is increased by the heat pump 30 that uses air, well water, or the like as an external heat source.

In this case, the water area inside the can body 2 does not have to be divided into a high-temperature layer and a low-temperature layer, but can be arranged as shown in the figure, that is, the engine 13 is placed in the upper part of the heat medium, and the heat exchanger 31 of the heat pump 30 is placed in the lower part. Then, temperature stratification due to natural convection can be obtained. Incidentally, with the configuration of this embodiment, hot water of about 50° C. or more is formed in the layer above the engine 13, and hot water with an upper limit of about 50° C. is formed in the layer below.

Therefore, when using this for heating, as shown in the example shown, a circulation pump 51 is used to circulate hot water in the can body 2 through a fan coil unit (not shown) and into the can body 2 from a return pipe 52. However, in this case, the high temperature range discharge pipe 53 is attached to the upper wall of the can body 2.
By providing low-temperature range discharge pipes 54 on the central wall and switching between them with a switching valve 55, efficient heating can be achieved.
That is, when a high amount of heat is required at the start of heating, high-temperature water is sent from the high-temperature range discharge pipe 53 to perform rapid heating, and when a steady state is reached, the switching valve 55 is switched to supply low-temperature water from the low-temperature range discharge pipe 54. If you send it, you can perform economical heating operation. Therefore, it also leads to energy saving.

If hot water is to be supplied, hot water in the can body 2 may be directly supplied, but clean hot water can be obtained by using hot water supply coils 56 and 57 as shown in the illustrated example. At this time, the hot water temperature level may be set by adjusting the heat transfer area of the hot water supply coils 56 and 57.

Therefore, according to the first embodiment, the engine 13 for driving the heat pump 30 is placed in the upper part of the heat medium such as water filled in the can 2, and the heat exchanger 31 of the heat pump 30 is placed in the lower part. Since the heat pump 30 is operated by driving the engine 13, the upper part of the heat medium where the engine 13 is located is a high-temperature layer, without using a heat exchange circulation pump or the like. Since temperature stratification is formed in which the lower part where the exchanger 31 is located is a low temperature layer, hot water can be efficiently produced while maintaining a small size and a high COP (coefficient of performance) of the heat pump 30. This also has the advantage that since the engine 13 is immersed in hot water at a high temperature, cold starts and various troubles associated therewith do not occur.

In this case, the heat generated from the main body of the engine 13 is directly absorbed by the heat medium, and the high temperature exhaust gas generated at the same time is absorbed by the heat medium while being discharged to the outside through the exhaust gas heat exchanger 25. , engine 1
All the waste heat from 3 can be effectively utilized to obtain high temperature hot water, thus saving fuel costs. Incidentally, if the configuration of this embodiment is adopted, hot water of about 50° C. or higher can be obtained above the engine 13, and hot water of about 50° C. can be obtained below the engine 13. Moreover, since these high-temperature and low-temperature layers are formed by natural convection, there is no need to separate the high-temperature and low-temperature layers using, for example, a partition plate. Rather,
The amount of heat dissipated between the engine 13 and the heat exchanger 31 is determined by the operating conditions, such as the outside temperature condition, and a high temperature layer and a low temperature layer are formed according to the ratio, so there is no need to perform detailed control. First, there is no need to make the tank two-layered, which has the advantage of reducing costs.

Thereby, by utilizing the hot water with different temperatures formed in the heat storage tank 1, it can be used for many other purposes in addition to heating and hot water supply. On this occasion,
When performing heating, a high temperature range discharge pipe 53 and a low temperature range discharge pipe 54 are provided according to the temperature stratification of the heating medium, and if these are switched by the switching valve 55, efficient heating operation can be performed.

In addition, since the mounting plate 10 equipped with the engine 13 and the compressor 14 is shaped like a floating boat, the buoyancy generated in the mounting plate 10 allows the engine 13 and the compressor 14 to be
The load acting on the support arm 11 and the support ring 7 due to the load can be reduced.

In addition, the tip of the support arm 11 is connected to the annular support ring 7, and this is supported around the entire circumference of the can body 2 via the hollow ring-shaped vibration absorbing material 6.
Since the load acting in the vertical direction is evenly distributed around the entire circumference of the can body 2 and is not concentrated, the spring constant of the vibration absorbing material 6 can be reduced, resulting in a sealing effect that prevents leakage of heat medium and noise from the engine and compressor. In addition, secondary vibrations to the can body 2 can be reliably prevented.

This also means that the stationary system of the can body 2 containing the heating medium and the vibration system having the engine 13, compressor 14, etc. are isolated around the entire circumference of the can body 2 via the vibration absorbing material 6. There is no damage to piping, etc. due to differences in systems. For example, since the refrigerant piping to the compressor 14 is also in the same system as the vibrating body of the engine 13, accidents such as refrigerant leaks are eliminated.

Furthermore, the engine 13 is immersed in the heat medium of the can body 2, and while the noise from the engine 13 to the sides and the bottom of the can body 2 is blocked, the engine noise leaking upward and the mechanical noise of the compressor 14 are blocked. Since the noise is blocked by the lid 3, these noises can be completely blocked. Moreover, since the inspection hatch 44 is provided on the lid 3, maintenance work on the equipment, especially replacement work of the oil filter 15, etc., can be easily performed as necessary.

3 and 4 show a second embodiment of the invention. In the description of this embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the explanation thereof will be omitted.

In the second embodiment, the horizontal surface 4 of the can body 2 and the lid body 3
A hollow rectangular cylindrical support ring 5 is placed between the horizontal surface 41 of the
7 is provided, and the intake pipe 22 and exhaust pipe 24 of the engine 13 are led out to the outside of the heat storage tank 1 through this support ring 57 . The support ring 57 is
As shown in FIG. 4, the outer end of the support arm 11 is supported at a 90 degree angle position on the inner circumference of the hollow rectangular cylindrical ring body 58 placed along the vibration absorbing material 6.
L-shaped connecting plates 59 are attached. Through holes 58A and 58B passing through the inner and outer peripheral walls of the ring body 58 are formed at opposing positions, and the suction pipe 28 connected to the intake pipe 22 is guided to the outside through the through holes 58A. , the exhaust pipe 24 is led out to the outside through the through hole 58B.

Therefore, in the second embodiment, in addition to the effects described in the first embodiment, the intake pipe 22 and exhaust pipe 24 of the engine 13 are connected to the heat storage tank 1 through the support ring 57.
Since the cover body 3 is led out to the outside, the cover body 3 can be easily opened. Therefore, maintenance work on internal equipment, especially inspection and replacement work of the oil filter 15, can be easily performed. Moreover, since the lid body 3 does not need to hold the intake pipe 22 and the exhaust pipe 24, it can be manufactured from a relatively rigid and lightweight material, such as a film-like material, and is therefore inexpensive. However, if the lid body 3 is made of a rigid material, other equipment such as an external evaporator 33 can be placed on the top surface of the lid body 3.

In this case, if noise reduction means 61 and 62 shown in FIG. 5 are provided inside the support ring 57, the intake and exhaust noise of the engine 13 can be suppressed. These silencing means 61, 62 are provided with a plurality of silencing chambers 64, 65, 6 inside the support ring 7 by a partition plate 63.
6, and these silencing chambers 64, 6
5 and 66 are sequentially communicated through throttle pipes 67 and 68, and intake and exhaust air are communicated with these silencing chambers 64 and 6.
5 and 66, the sound is muted by repeated aperture and diffusion. Therefore, since the muffling means 61 and 62 are formed within the support ring 57, the overall size can be reduced.

FIG. 6 shows a third embodiment of the invention.
In the description of this embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the explanation thereof will be omitted.

In the third embodiment, the vertical surface 5 of the can body 2 is extended upward, and the lid 3 is directly fitted onto the upper edge of the vertical surface 5.

Therefore, in the third embodiment, in addition to the effects described in the first embodiment, if the lid body 3 is made of synthetic rubber,
There is an advantage that the heat storage tank 1 can be made into an airtight structure without putting a sealant into the fitting portion between the can body 2 and the lid body 3.

Note that in each of the embodiments described above, the engine 1
3 does not need to be immersed in the heat medium of the can body 2. For example, if only a part of the engine 13 or the exhaust pipe 24 is immersed in the heat medium, in other words, if the exhaust heat of the engine 13 is to be used for storing heat in the heat medium, the mode of immersion is not an issue. It's not something you do.
Furthermore, the support portion of the engine 13 is not limited to the can body 2, but may be the lid body 3.

Further, in each embodiment, the upper part of the can body 2 is bent outward to form a horizontal surface 4 on which the vibration absorbing material 6 is placed, but for example, as shown in FIG. The horizontal receiving portion 71 that protrudes inward along the horizontal receiving portion 71 may be integrally configured. In this way, the can body 2 can be made completely cylindrical, making it easy and inexpensive to manufacture.

In addition to the hollow tube made of elastic rubber described in the above embodiment, the vibration absorbing material 6 may be made of a foamed sponge material or the like as long as it can obtain a spring constant equivalent to the low spring constant of air suspension. You can.

Furthermore, if a sound absorbing material, a sound insulating material, or the like is attached to the inner surface of the lid 3, it is possible to further reduce engine noise and compressor mechanical noise.

As described above, the present invention provides a vibration isolation structure for an internal combustion engine-driven heat storage system that efficiently absorbs transmission of vibrations from the engine while maintaining the engine support function and the sealing effect of the heat storage tank. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the present invention;
Fig. 2 is a perspective view showing the support ring, Fig. 3 is a sectional view showing a second embodiment of the present invention, Fig. 4 is a perspective view showing the support ring, and Fig. 5 is a modification of the support ring. 6 is a sectional view showing a third embodiment of the present invention, and FIG. 7 is a sectional view of main parts showing a modification of the can body. 1... Heat storage tank, 4, 71... Horizontal receiving surface, 6...
Vibration absorbing material, 7... Support ring, 10... Mounting plate as a support plate, 11... Support arm, 13... Engine as an internal combustion engine.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An internal combustion engine is installed inside a heat storage tank filled with a heat medium such as water, and the drive exhaust heat of this internal combustion engine is stored in the heat medium in the heat storage tank. 1. A vibration isolation structure for an internal combustion engine-driven heat storage system, characterized in that the internal combustion engine is supported around the entire circumference of the heat storage tank via a ring-shaped vibration absorbing material. (2) The vibration-proofing structure for an internal combustion engine-driven heat storage system according to claim 1, wherein the vibration-absorbing material is hollow and air is injected into the vibration-absorbing material. (3) In claim 1 or 2 of the utility model registration claim, the vibration absorbing material is placed on a horizontal receiving surface formed along the entire circumference of the heat storage tank, and a plurality of vibration absorbing materials are placed on the horizontal receiving surface formed along the entire circumference of the heat storage tank. 1. A vibration isolation structure for an internal combustion engine drive heat storage system, characterized in that a support ring having a support arm is mounted, and the internal combustion engine is supported via a mounting plate on an inner end of the support arm. (4) The vibration isolation structure for an internal combustion engine-driven heat storage system according to claim 3, wherein the mounting plate is shaped like a floating boat that can float on the surface of the heat medium.