JPH0234453Y2 - - 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.

BACKGROUND ART Conventionally, so-called engine heat pumps have been known in which a driven device such as a compressor of a heat pump is driven by an engine, but since this uses an engine, noise countermeasures are required.

Therefore, in order to prevent engine noise and to effectively utilize engine drive exhaust heat and exhaust heat, the engine is immersed in a sealed heat storage tank filled with a heat medium such as water, thereby reducing engine noise. In addition to solving this problem, a heat storage system was devised that stores exhaust heat from the engine in a heat medium and uses it for heating, hot water, etc.

However, in the case of such a heat storage system, the closed heat storage tank is filled with vapor of a heat medium heated by engine drive exhaust heat, exhaust heat, etc., and the moisture in the vapor atmosphere is used to compensate for the engine. There is a problem in that the durability of electrical components such as starters is reduced. Therefore, by applying moisture-proofing treatment to these electrical components, it is possible to prevent the effects of moisture, but on the other hand,
It has the disadvantage of being expensive.

An object of the present invention is to provide an internal combustion engine-driven heat storage system in which engine accessories are not affected by moisture while maintaining heat storage efficiency and soundproofing effects.

Therefore, in the present invention, in a 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 heat storage tank is divided into a can body and a lid body, and a partition body is provided between the can body and the lid body over the entire circumference to separate the inside of the heat storage tank from above and below, and the lower surface of this partition body is provided. The internal combustion engine is supported on the side, and a moisture isolation chamber is formed on the upper surface side of the partition body, which is substantially closed with the lid and isolated from the heat medium, and the auxiliary equipment of the internal combustion engine is installed in the moisture isolation chamber. By housing the auxiliary equipment of the internal combustion engine, it is isolated from the steam atmosphere of the heat storage tank and prevented from being affected by moisture. Furthermore, by storing the internal combustion engine in a moisture isolation chamber that is almost closed to the outside, it is possible to block out the operating noise of auxiliary equipment, and by supporting the internal combustion engine on a partition body held inside the heat storage tank. To improve vibration-proofing properties and soundproofing properties compared to the case where an internal combustion engine is directly attached to a heat storage tank body.

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. A partition body 7 is placed around the entire circumference of the horizontal surface 4 to separate the inside of the heat storage tank 1 from above and below, with a hollow ring-shaped vibration absorbing material 6 interposed between the partition body 7 and the cover body 3 . As a result, above the partition body 7,
A moisture isolation chamber 17 is formed below the can body 2 and isolated from the heat medium storage section. 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 partition body 7 by air injected into the inside. . Further, as shown in FIG. 2, the partition body 7 includes a support ring 8 in the shape of a hollow rectangular tube placed along the vibration absorbing material 6, and an inner peripheral edge of the lower surface of the support ring 8 made of elastic rubber or the like. A mounting putty 11 is joined via a sealing material 9 and connected with a plurality of bolts 10. The inside of the support ring 8 is filled with a foam 18 such as urethane, and two through holes 12A and 12B and a plurality of communication holes 12C are formed in the peripheral wall portion, respectively, passing through the inner peripheral wall and the outer peripheral wall. has been done. The mounting plate 11 has an engine 13 as an internal combustion engine that is formed as a floating boat that floats on the liquid surface of the heating medium, and has an engine 13 as an internal combustion engine that is completely immersed in the heating medium on the bottom surface, that is, on the top surface, that is, the water A compressor 14 of a heat pump 30 driven by the engine 13, an oil filter 15, and auxiliary equipment 16 of the engine 13, mainly electric components such as a starter, are provided in the isolation chamber 17. Therefore, the load acting on the vibration absorbing material 6 due to the loads of the engine 13, compressor 14, etc. is reduced by the buoyancy generated on the mounting plate 11.

The other end of an intake pipe 22 is connected to the intake side of the engine 13, one end of which protrudes through the mounting plate 11 into a moisture isolation chamber 17 formed by the lid 3 and the partition 7. At the same time, one end on the exhaust side is connected to the through hole 1 of the support ring 8.
The other end of an exhaust pipe 24 that protrudes to the outside of the heat storage tank 1 through 2B and is immersed in the heat medium is connected to the other end. One end of the intake pipe 22 is led out to the outside of the heat storage tank 1 via an air cleaner 22A and an intake pipe 28 inserted through the through hole 12A of the support ring 7. In addition, in the middle of the exhaust pipe 24,
An exhaust gas heat exchanger 25 for discharging exhaust heat from the engine 13 into the heat medium in the heat storage tank 1 and a drain pot 27 for leading a drain pipe 26 to the outside of the can body 2 are provided. This results in
When the engine 13 is driven, 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 passes through the exhaust gas heat exchanger 25, drain pot 27, and exhaust pipe 24 in the heat medium. The heat is absorbed by the heat medium and the temperature becomes low, which is then 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. Note that all of the refrigerant piping of the compressor 14 and the wiring of the auxiliary equipment 16 are connected to the outside through the communication hole 12C of the support ring 8.

On the other hand, the lower peripheral wall of the lid 3 is bent outward into a horizontal plane 41 so as to rest on the support ring 8, and then further bent downward into a vertical plane 42. . A cushion material 43 is interposed between the horizontal surface 41 and the vertical surface 42 along the entire circumference. Further, a sound absorbing material 44 is attached to the inner circumferential portion excluding the lower circumferential wall.

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. At this time, the inside of the can body 2 below the partition body 7 is filled with steam due to the temperature rise of the heating medium, but since the moisture isolation chamber 17 is isolated from the steam atmosphere,
The compressor 14 and auxiliary equipment 16 are protected from the moisture of the steam atmosphere.

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, it absorbs heat from the outside in an external evaporator 33, is vaporized and expanded, and then returns to the compressor 14.
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, connect the high temperature range supply pipe 53 to the upper wall of the can body 2.
By providing low-temperature range supply 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 supply 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 supply 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 this embodiment, the engine 13 for driving the heat pump 30 is immersed in the upper part of the heat medium such as water filled in the can body 2, and the heat exchanger 31 of the heat pump 30 is immersed in the lower part. As a result, the heat pump 3 is activated by the engine 13.
0, the upper part of the heat medium where the engine 13 is located is a high temperature layer, and the lower part where the heat exchanger 31 is located is a low temperature layer. is formed, 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, efficient heating operation can be performed by providing a high temperature range supply pipe 53 and a low temperature range supply pipe 54 according to the temperature stratification of the heat medium and switching these with a switching valve 55.

Further, the heat storage tank 1 is composed of a can body 2 and a lid body 3, and a partition body 7 is provided between the can body 2 and the lid body 3 to support the engine 13 and to vertically isolate the interior of the heat storage tank 1. Since the compressor 14 and the auxiliary equipment 16 of the engine 13 are housed in the moisture isolation chamber 17 formed by the partition body 7 and the lid 3, the auxiliary equipment 16 etc. are isolated from the steam atmosphere and the steam is removed. Can be prevented from moisture in the atmosphere. Moreover, engine 13
Since the partition body 7 reliably partitions the inside and outside of the can body 2 by such a load, weight loss due to evaporation of water in the can body 2 can be prevented.

The partition body 7 is composed of a support ring 8 and a mounting plate 11 joined to the support ring 8 through a sealing material 9, and the support ring 8 is connected to the can body through a 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, and as a result, the heat medium and Not only does it have a sealing effect that prevents leakage of noise from engines and compressors, etc.
Secondary vibrations to the can body 2 can also be reliably prevented. Further, since the horizontal torsion generated by the engine 13 at the time of startup is also received by the entire circumference of the vibration absorbing material 6, the frictional force can be used to sufficiently cope with the torsion. Therefore, there is no need to fix the support ring 8 to the can body 2 with bolts or the like. Moreover, since the mounting plate 11 including the engine 13 and the compressor 14 is shaped like a floating boat, the load acting on the vibration absorbing material 6 due to the buoyancy generated in the mounting plate 11 can be reduced. This also means that the static system of the can body 2 having the heat 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, so the vibration system There is no damage to piping, etc. due to differences in 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.

Further, since the intake pipe 22 and exhaust pipe 24 of the engine 13 are led out of the heat storage tank 1 through the support ring 8, the lid body 3 can be easily opened. Therefore, maintenance work on internal equipment,
In particular, inspection and replacement work of the oil filter 15 and air cleaner 22A can be easily performed. Furthermore, 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 it is made of a rigid material, there is an advantage that other equipment such as the external evaporation equipment 33 can be placed on the top surface of the lid body 3.

Further, the engine 13 is immersed in the heat medium of the can body 2, and while the noise from the engine 13 leaking to the sides and downwards of the can body 2 is blocked, the engine noise leaking upward is blocked by the partition body 7. Since the mechanical noise of the compressor 14 is blocked by the cover 3 and the support ring 8, these noises can be completely blocked. Moreover, since the sound absorbing material 44 is attached to the lid 3 and the support ring 8 is filled with the foam 18,
It can be expected to not only have a sound insulation effect, but also a heat insulation and reinforcement effect.

In the above embodiment, if the support ring 8 is provided with noise reduction means 61 and 62 shown in FIG. 3, for example, the intake and exhaust noise of the engine 13 can be suppressed. These silencing means 61, 62 are
A plurality of silencing chambers 64 , 65 , 66 are configured inside the support ring 8 by partition plates 63 , and these silencing chambers 64 , 65 , 66 are connected to throttle tubes 67 , 6 .
8, and the intake air and exhaust air are repeatedly throttled and diffused while passing through these silencing chambers 64, 65, and 66, thereby muffling the noise. Therefore, since the muffling means 61 and 62 are formed within the support ring, the overall size can be reduced.

4 and 5 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 support ring 8 is formed into a hollow ring shape with a substantially L-shaped cross section, and the lid 3 is fitted onto the top of the support ring 8 . A through hole 12B for guiding the exhaust pipe 24 of the engine 13 to the outside is vertically formed in the support ring 8, and a through hole 12B for guiding the exhaust pipe 24 of the engine 13 to the outside is formed.
A communication hole 12C is formed for leading the refrigerant pipe No. 4 and the wiring of the auxiliary machine 16 to the outside. On the other hand, an air suction port 46 having an air filter 45 is formed in the lid body 3, and air is taken into the engine 13 through this air suction port 46. In this case, the air suction port 46 is the sixth
As shown in the figure, it may be provided on the support ring 8.

Therefore, in addition to the effects described in the first embodiment, the second embodiment can reduce the overall size, and
The exhaust pipe 24 can be led out upward. Thereby, the protrusion in the circumferential direction can be eliminated, and the projected area on the plane can be the area of the can body 2.

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.

In addition to the elastic rubber hollow tube 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. It's okay.

Further, in each of the embodiments described above, the partition body 7 is constituted by the support ring 8 and the mounting plate 11, but these may be integrally formed. However, by interposing an elastic sealing material 9 between the support ring 8 and the mounting plate 11 as a separate body, the sealing material 9 blocks the vibrations of the engine 13 transmitted to the mounting plate 11, and the heat storage tank Vibration noise etc. from 1 can be reduced.

As described above, according to the present invention, it is possible to provide an internal combustion engine-driven heat storage system in which the auxiliary equipment of the internal combustion engine is not affected by moisture while maintaining heat storage efficiency and soundproofing effect.

[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 partition, Fig. 3 is a perspective view showing a modified example of the partition, Fig. 4 is a sectional view showing the second embodiment of the present invention, and Fig. 5 is the partition. FIG. 6 is a perspective view showing the body, and FIG. 6 is a sectional view showing a part of a modified example of the partition body. 1... Heat storage tank, 2... Can body, 3... Lid body, 7...
... Partition body, 8 ... Support ring, 9 ... Sealing material,
11...Mounting plate, 13...Engine as an internal combustion engine, 16...Auxiliary equipment, 17...
Moisture isolation chamber, 18... foam, 22... intake pipe,
24...exhaust pipe, 61, 62...silencing means.

Claims (1)

[Claims for Utility Model Registration] (1) A 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 heat storage tank is divided into a can body and a lid body,
A partition body is provided between the can body and the lid body over the entire circumference to separate the inside of the heat storage tank from above and below, and the internal combustion engine is supported on the lower surface side of the partition body, and the internal combustion engine A heat storage device driven by an internal combustion engine, characterized in that a moisture isolation chamber is formed on the upper surface side of the body and is substantially closed by the lid body and isolated from the heat medium, and an auxiliary machine of the internal combustion engine is housed in the moisture isolation chamber. system. (2) In claim 1 of the utility model registration claim, the partition body includes a support ring interposed between the can body and the lid body over the entire circumference, and a seal on the inner circumference of the support ring. 1. A heat storage system driven by an internal combustion engine, comprising: a mounting plate whose entire circumference is joined via a material, and wherein the internal combustion engine is supported on a lower surface side of the mounting plate. (3) Utility model registration Claim 2, wherein at least one of an intake pipe and an exhaust pipe of the internal combustion engine is passed through the support ring and led out to the outside. Heat storage system. (4) Utility Model Registration The internal combustion engine-driven heat storage system according to claim 3, characterized in that a sound absorbing material is attached to the inner surface of the lid, and a foam is filled inside the support ring. (5) Utility model registration Claims 3 or 4, characterized in that the supporting ring is provided with a silencing means for silencing at least one of the air supply and exhaust sounds of the internal combustion engine. An internal combustion engine-driven heat storage system.