JPH11200951A - Cogeneration equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To directly cool a ventilation fan motor section with outside air while suppressing noise. SOLUTION: In a cogeneration device surrounded by a soundproof case 1, a ventilation fan 45 is provided on an upper side near an exhaust port 53 of the soundproof case 1, and a ceiling plate 27 of the soundproof case 1 is connected to an upper ceiling plate 31 and a lower ceiling. A hollow portion 33 is formed by adopting a double structure of the plate 32, and an outside air intake passage communicating the outside of the soundproof case 1 and the hollow portion 33 is provided.
A motor opening 51 is provided in the lower ceiling plate 32 on the third side, and the motor portion 45a of the ventilation fan 45 faces the motor opening 51.
Is facing. Then, the outside air is sucked into the soundproof case 1, which has a negative pressure by the driving of the ventilation fan 45, through the outside air suction passage, the hollow portion 33, and the motor opening 51, thereby cooling the motor portion 45 a of the ventilation fan 45. The cooling air 52 is generated, and the motor unit 45 of the ventilation fan 45 is generated.
a is cooled directly with unheated outside air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cogeneration system.

[0002]

BACKGROUND OF THE INVENTION As the above cogeneration apparatus,
There is known a soundproof case including a gas engine, a generator, an exhaust gas heat exchanger, and a hot water supply heat exchanger. Demand for such a soundproof type cogeneration device is increasing because of its low noise.

[0003]

The above soundproof cogeneration apparatus has the following technical problems. (A) Since the heat of the engine accumulates in the soundproof case, it is important to ventilate the soundproof case with a ventilation fan. To increase the ventilation capacity of the soundproof case, it is sufficient to increase the intake and exhaust ports and adopt a ventilation fan with a large output, but if the intake and exhaust ports are enlarged, leakage of engine noise will increase, When a ventilation fan with a large output is used, there is a problem that the noise of the ventilation fan itself increases.

(B) In the above cogeneration system, an electric cooling water pump is used to circulate engine cooling water to the hot water supply heat exchanger. The electric cooling water pump is disposed in the soundproof case where the cooling air is sufficiently applied so as not to be overheated. However, in the conventional cogeneration system, the temperature of the cooling air is raised by the hot air of the engine in the soundproof case before the cooling air sucked from the intake port hits the electric cooling water pump, and the electric cooling water pump is not sufficiently cooled. There were many things. (C) Since the air heated by the engine accumulates in the upper region inside the soundproof case, the ventilation fan is often arranged near the exhaust port and above the soundproof case. However, if the ventilation fan is disposed at such a position, there is a problem that the durable life of the motor of the ventilation fan is shortened by the heated air.

(D) When a gas engine is used as the engine of the cogeneration system, gas supply elements such as a gas regulator and a gas shutoff valve are required. However, when the temperature inside the soundproof case becomes high, there is a possibility that a problem such as inactivation of the gas supply element may occur, and it is necessary to consider a method of efficiently cooling the gas supply element.

(E) In a soundproof engine in which the engine is housed in a soundproof case as in the above cogeneration apparatus, maintenance of the engine is essential. In such a maintenance work, a mounting structure capable of efficiently attaching and detaching the side wall plate of the soundproof case while preventing rainwater has been desired. (F) Of the noise leaking from the intake port in the soundproof case, it is difficult to reduce engine intake noise in a low frequency range. In order to reduce such engine intake noise, it is effective to provide a large-capacity resonance chamber for noise reduction. However, providing a large resonance chamber for noise reduction in the passage of the intake duct can reduce the size of cogeneration equipment. There is a problem that goes against it. (G) Since the generator control panel for controlling the generator uses a precision control device such as an IC, it is necessary to prevent the temperature of the generator control panel from excessively rising.

[0007] The present invention has been made in view of the above problems, and an object of the present invention is to provide a technique capable of solving each of the above problems. An example of a specific purpose is as follows. (a) To provide a cogeneration device capable of effectively cooling a motor section of a ventilation fan while suppressing noise leaking from inside a soundproof case. (b) Provided is a cogeneration device that can directly cool the gas supply element with outside air even when the temperature in the soundproof case rises to some extent. (c) Provided is a cogeneration device that can directly cool the cooling water pump by outside air even when the temperature inside the soundproof case rises to some extent. It should be noted that other objects of the invention and means for solving them will be described in detail in the description of the specification which will be described later.

[0008]

The present invention will be described with reference to FIGS. 1 to 10 showing an embodiment of the present invention, for example. The first invention mainly relates to a cogeneration system in which an engine 2, a generator 3 and heat exchangers 5 and 6 are provided in a soundproof case 1 as shown in FIG. By providing an opening 53 and a ventilation fan 45 on the upper side near the exhaust port 53 of the soundproof case 1, the ceiling plate 27 of the soundproof case 1 has a double structure of an upper ceiling plate 31 and a lower ceiling plate 32. A hollow portion 33 is formed, an outside air suction passage communicating the outside of the soundproof case 1 with the hollow portion 33 is provided, a motor opening 51 is provided in a lower ceiling plate 32 on an exhaust port 53 side, and ventilation is performed facing the motor opening 51. With the motor unit 45a of the fan 45 facing, the main fan 60 drives the ventilation fan 45 to generate a main ventilation wind 60 that exhausts the outside air taken in from the intake port 46 through the exhaust port 53, thereby ventilating the inside of the soundproof case 1, and 4
By sucking outside air through the outside air intake passage, the cavity 33, and the motor opening 51 into the soundproof case 1, which has become a negative pressure due to the driving of the cooling unit 5, the cooling air 52 above the ceiling that cools the motor 45 a of the ventilation fan 45 is cooled. Generating and ventilating fan 45
The overheating of the motor section 45a is prevented.
As a method of forming the outside air suction passage, as shown in FIGS. 5 and 6, there is provided a structure in which an outside air inlet 70 communicating directly with the outside from the hollow portion 33 of the ceiling plate 27, or as shown in FIG. Once the outside air introduced into the soundproof case 1 from the intake port 46 can be branched to the cavity 33,
A configuration in which a ceiling opening 49 is provided in the lower lower ceiling plate 32 can be exemplified.

According to a second aspect of the present invention, as shown in FIGS. 1 and 4, a cogeneration system in which a gas engine 2, a generator 3, and heat exchangers 5 and 6 are provided in a soundproof case 1 is provided. An intake port 46 and an exhaust port 53 are provided on the side wall, a ventilation fan 45 is provided on the upper side near the exhaust port 53 of the soundproof case 1, and a gas piping chamber 56 separated from the engine housing chamber 35 is provided in the soundproof case 1. Provided and its gas piping room 5
6, gas supply elements such as gas valves are collectively accommodated, an opening 66 for an accommodation room communicating with the engine accommodation room 35 is provided at an upper position of the gas piping room 56, and the base of the soundproof case 1 is provided with the hollow portion 30. It is configured as a hollow base 21 provided with
A ventilation port 57 for a gas pipe chamber is provided in a base side plate 63 of the hollow base portion 21, and communication paths 64 and 65 communicating from the ventilation port 57 for a gas pipe chamber to the gas pipe chamber 56 are provided. The inside of the soundproof case 1 is ventilated by generating a main ventilation wind 60 that exhausts the outside air taken in through the intake port 46 from the exhaust port 53, and the ventilation fan 45 drives the ventilation port 57 for the gas piping chamber of the hollow base 21. The cooling air 61 for the gas piping chamber which flows into the engine storage chamber 35 through the communication passages 64 and 65, the gas piping chamber 56, and the opening 66 for the storage chamber is generated.

According to a third aspect of the present invention, as shown in FIGS. 1 and 2, in a cogeneration system in which a gas engine 2, a generator 3, and heat exchangers 5 and 6 are provided in a soundproof case 1, a soundproof case 1 is provided. An intake port 46 and an exhaust port 53 are provided on the side wall of the engine, and a ventilation fan 45 is provided on an upper side near the exhaust port 53 of the soundproof case 1.
A gas supply chamber such as a gas valve and an electric cooling water pump 9 are collectively accommodated in the gas supply chamber 56, and an engine accommodation chamber is provided on the wall of the gas supply chamber 56. A cooling gap 59 is formed at a position corresponding to the cooling water pump 9 while communicating with the cooling water pump 9, and a ventilation port 57 for the gas piping chamber communicating with the gas piping chamber 56 is provided on the side wall of the soundproof case 1. By driving, the main ventilation wind 60 that exhausts the outside air taken in from the intake port 46 through the exhaust port 53 to ventilate the inside of the soundproof case 1,
By driving the ventilation fan 45, outside air is sucked from the gas pipe room ventilation opening 57 on the side wall of the soundproof case 1, and the gas pipe room cooling air 61 flowing into the engine housing chamber 35 through the gas pipe room 56 and the cooling gap 59 is generated. It is characterized by generating.

[0011]

According to the first aspect of the present invention, in addition to the main ventilation wind for generally ventilating and cooling the inside of the soundproof case, it is possible to generate the cooling air above the ceiling for intensively cooling the motor of the ventilation fan. . With this configuration, it is possible to sufficiently cool the motor part of the ventilation fan without increasing the opening area of the intake port to increase the amount of main ventilation air, and to reduce noise leakage from the intake port. it can. In the case of the second invention, in addition to the main ventilation wind for generally ventilating and cooling the inside of the soundproof case,
It is possible to generate a cooling air for a gas piping chamber that intensively cools a gas supply element such as a gas valve. With this configuration,
Even if the temperature inside the soundproof case becomes high to some extent, the gas supply element such as the gas valve can be directly cooled by the outside air, so that the malfunction of the gas supply element can be prevented. According to the third aspect of the invention, in addition to the main ventilation wind for generally ventilating and cooling the inside of the soundproof case, it is possible to generate the cooling air for the gas piping chamber for intensively cooling the gas supply element and the cooling water pump. In particular, since the electric cooling water pump can be directly cooled by the outside air, the reliability of the cooling water pump can be maintained for a long period of time and the life thereof can be extended.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front longitudinal sectional view of a cogeneration apparatus showing a first embodiment of the present invention, FIG. 2 (A) is a longitudinal sectional view on an exhaust port side, FIG. 2 (B) is a perspective view around a cooling water pump, FIG. 3 is a schematic diagram of a cogeneration apparatus. As shown in FIG. 3, the cogeneration system includes a gas engine 2 and a generator 3 driven by the gas engine 2 in a soundproof case 1. The water jacket 4 of the gas engine 2 and the hot water supply heat exchanger 6 communicate with each other through a cooling water circulation path 7. In addition, a thermostat valve 8 for bypassing the hot water supply heat exchanger 6 and an electric cooling water pump 9 are provided in the cooling water circulation path 7. When the temperature of the cooling water is low immediately after starting the engine, the cooling water is bypassed via the thermostat valve 8. When the cooling water temperature rises, the cooling water is circulated to the hot water supply heat exchanger 6 via the thermostat valve 8, and the hot water heated by the hot water supply heat exchanger 6 is stored in the hot water tank 11. It is configured in.

Further, an exhaust heat circulation path 14 for circulating the cooling water from the position of the exhaust gas heat exchanger 5 in the cooling water circulation path 7 to the exhaust heat radiating devices 13 disposed outside the soundproof case 1 is branched. The cooling water that has passed through the exhaust heat radiating devices 13 is communicated with the conduit 15 in the hot water supply heat exchanger 6. A thermo valve 16 whose degree of opening changes according to the temperature of the cooling water circulation path 7 is provided at the position of the pipe line 15 on the way. When the hot or cold water in the hot water storage tank 11 is not used or the amount of the hot water decreases, the heat exchange capacity of the cooling water by the hot water supply heat exchanger 6 decreases, and the engine 2 cannot be sufficiently cooled. When the temperature of the cooling water at the position of the passage 15 becomes equal to or higher than the opening temperature of the thermo valve 16, the thermo valve 16 is started to be opened, and a part of the cooling water is caused to flow to the exhaust heat circulation passage 14 and the exhaust heat radiation 13 allows the cooling water to be cooled directly.

The gas supplied from the outside of the soundproof case 1 is introduced into the gas supply pipe 20, and the gas shutoff valve 17,
The gas is mixed with air by a mixer (not shown) through the gas regulator 18 and supplied to the combustion chamber of the engine 2. Exhaust gas discharged from the exhaust gas heat exchanger 5 is exhausted from the muffler 19 to the outside of the soundproof case 1 via an exhaust pipe. The electromotive force of the generator 3 is used for an external load via the generator control panel 12. The ventilation fan 45 for ventilating the inside of the soundproof case 1 is operated by the electric power generated by the generator 3. In FIG. 3, reference numeral 43 denotes a reserve tank,
Reference numeral 44 denotes a radiator cap. Next, an internal configuration of the cogeneration apparatus according to this embodiment will be described with reference to FIGS. Note that the reference numerals of the respective components of the cogeneration apparatus described in FIG. 3 are the same in the components shown in FIGS. 1 and 2, and a description of the functions of the respective components will be omitted for simplicity.

As shown in FIGS. 1 and 2, in this cogeneration system, a rectangular frame is provided on a hollow base 21 and a front plate 23 (see FIG. 2) and a rear plate 24 (see FIG. 2) are provided on the frame. ), Left panel 25, right panel 2
6. The soundproof case 1 is configured by attaching the ceiling plate 27. The hollow base portion 21 has a predetermined region between the upper plate 28 and the lower plate 29 as a hollow portion 30 to enhance soundproofing. The ceiling board 27 has a double structure of an upper ceiling board 31 and a lower ceiling board 32.
2, a cavity 33 through which the cooling air 52 above the ceiling can pass.
Is provided. As shown in FIG. 1, the interior of the soundproof case 1 is roughly divided into an intake duct chamber 34, an engine accommodating chamber 35, an exhaust duct chamber 36, and a gas piping chamber 56, and a sound absorbing material is attached to each inner surface. It is.

The engine 2 and the generator 3 are fixed to the upper plate 28 of the hollow base 21 via a vibration isolator 38, respectively. The generator 3 is covered by a casing 39, and a cooling air suction port 40 is formed on the left front side, and air in the intake duct chamber 34 is discharged from the cooling air suction port 40 by a flywheel fan (not shown) of the engine 2. The generator 3 is cooled by sucking and discharging the cooling air from the cooling air outlet 41 at the rear of the generator.

The intake duct chamber 34 is provided in the soundproof case 1 by providing an intake duct chamber partitioning plate 42 which extends vertically to the lower ceiling plate 32 at a position on the left side of the cooling air outlet 41 of the generator 3 in FIG. It is formed by partitioning. It should be noted that a reserve tank 43 can be placed above the generator 3. The intake duct chamber partition plate 42 is provided with the ventilation opening 22 and an engine intake hole as indicated by reference numeral 95 in FIG. 10 so that the engine intake air is supplied to the air cleaner 73 through the engine intake hole. It is. The air cleaner 73 has a distal end 73 a protruding from the intake duct chamber 34 so as to lower the temperature of the air cleaner 73. In addition, a ceiling opening 49 communicating with the cavity 33 is provided in the lower ceiling plate 32 facing the intake duct chamber 34. An intake port 46 is opened above the left side plate 25 of the soundproof case 1, and a cover port 4 is provided on the lower side so as to cover the intake port 46.
The air intake duct cover 48 provided with the air conditioner 7 is attached.

The compartment of the engine accommodating chamber 35 and the exhaust duct chamber 36 is defined by an exhaust duct chamber partition plate 50 provided behind the engine 2 (right side in FIG. 1). A ventilation fan 45 is mounted above the exhaust duct partition plate 50 to allow the air in the engine accommodating chamber 35 to pass through the ventilation fan 4.
5 sucks air into the exhaust duct chamber 36.
A part of the motor part 45 a of the ventilation fan 45 protrudes into the motor opening 51 of the lower ceiling plate 32.

An exhaust port 53 is opened at a position corresponding to the exhaust duct chamber 36 at a position above the right face plate 26 of the soundproof case 1, and the exhaust duct cover 5 covers the exhaust port 53.
The exhaust duct cover 55 is provided with a cover port 54 on the lower side. As shown in FIG. 2A, a gas piping chamber 56 is formed by attaching a gas piping case 55 to the exhaust duct partition plate 50. Further, a gas pipe room ventilation opening 57 communicating with the gas pipe chamber 56 is opened in the front plate 23 of the soundproof case 1. The gas piping chamber 56 accommodates gas supply elements such as the gas shutoff valve 17 and the gas regulator 18 and the cooling water pump 9. As shown in FIGS. 2A and 2B, a pump inlet opening 58 is opened in the bottom plate 55a of the gas pipe chamber case 55, and the main body 9a of the cooling water pump 9 is inserted into the pump inlet opening 58 in the gas pipe chamber 56. To form a cooling gap 59 having an annular shape. That is, the gas pipe chamber 56 is in communication with the engine housing chamber 35 only in the annular cooling gap 59 and is in a state of being isolated from the exhaust duct chamber 36. Since the bottom plate 55 a of the gas piping chamber case 55 also serves as the bottom plate of the exhaust duct chamber 36, the exhaust duct chamber 36 and the engine housing chamber 35 are in communication only with the ventilation fan 45.

As shown in FIG. 1, when the engine housing chamber 35 has a negative pressure due to the driving of the ventilation fan 45, outside air is sucked into the intake duct chamber 34 from the intake port 46, and the outside air is drawn from the ventilation opening 22 of the intake duct chamber partition plate 42. It flows into the engine storage chamber 35. Further, the cooling air sucked from the cooling air suction port 40 of the generator 3 blows out from the cooling air outlet 41 and flows into the engine accommodating chamber 35. Then, the air heated in the engine accommodating chamber 35 is exhausted from the exhaust port 53 by the ventilation fan 45 through the exhaust duct chamber 36. The inside of the soundproof case 1 is ventilated and cooled by such a main ventilation wind 60. On the other hand, the operation of the ventilation fan 45 causes a negative pressure in the engine housing chamber 35, so that the air in the cavity 33 is sucked out from the gap between the motor part 45 a and the motor opening 51, and from the ceiling opening 49 of the intake duct chamber 34 to the ceiling. The back cooling air 52 is sucked. The cooling air 52 above the ceiling can intensively cool the motor portion 45a of the ventilation fan 45. Further, when the pressure in the engine housing chamber 35 becomes negative, outside air is sucked into the engine housing chamber 35 from the cooling gap 59, and as a result, the outside air is sequentially sucked in from the ventilation port 57 for the piping chamber, and Since the cooling air 61 for the gas pipe chamber flows around the cooling water pump 9, the motor and the bearing of the cooling water pump 9 can be efficiently cooled, and the life of the cooling water pump 9 can be extended. Further, with this configuration, even if the temperature in the soundproof case 1 is high, the inside of the gas pipe chamber 56 is directly cooled by the outside air, so that the overheating of the cooling water pump 9 and the gas supply element can be efficiently prevented. .

[0021]

Second Embodiment FIGS. 1 and 4 are views for explaining a second embodiment of a cogeneration system according to the present invention. In the second embodiment, a cooling air 61 for a gas piping chamber is used.
Is introduced from the hollow base portion 21. That is, the configuration of the second embodiment is different from that of the first embodiment in the following points. First, as shown in FIG. 4, a ventilation hole 57 for a piping chamber is formed in the base side plate 63 of the hollow base portion 21 and communicates with a position corresponding to the gas piping chamber 56 of the upper plate 28 of the hollow base portion 21. A hole 64 is provided, a ventilation passage 65 extends from the communication hole 64, and a ventilation hole 57 for a piping room and a gas piping room 56 are provided.
It is trying to communicate. Therefore, the ventilation port 57 for the plumbing chamber of the front plate 23 as in the first embodiment is not provided. Second, the gas piping chamber 5 on the engine housing chamber 35 side
An opening 66 for the accommodation room that communicates with the engine accommodation room 35 is provided in the wall of No. 6. Therefore, the cooling gap 59 as in the first embodiment is not provided.

In the configuration of the second embodiment, the main ventilation air 60 and the cooling air behind the ceiling 52 are the same as those of the first embodiment, but the ventilation holes 57 for the piping chamber of the base side plate 63 of the hollow base 21 are provided. The outside air that has entered through the hollow part 30, the communication hole 64, the ventilation passage 65, the gas piping chamber 56, and the opening 66 for the accommodation chamber flows into the engine accommodation chamber 35. Also in the second embodiment, there is an advantage that the gas pipe of the gas pipe chamber 56 can be cooled with fresh outside air. Further, in this configuration, in the configuration in which the gas leak alarm 67 is mounted near the accommodation room opening 66, even if a gas leak occurs in the gas piping chamber 56, the gas leak alarm 67 is located above the gas piping chamber 56 from the base. Since the flow of the cooling air is generated toward this, there is an advantage that the detection can be performed quickly. This effect is remarkable when gas heavier than air is used as fuel for a gas engine. In the second embodiment, both a configuration in which the cooling water pump is provided in the gas piping chamber 56 and a configuration in which the cooling water pump is not provided can be adopted.

[0023]

Third Embodiment FIGS. 5 and 6 show a third embodiment of the present invention.
FIG. 11 is a diagram for explaining the embodiment, and is characterized in that the cooling air 52 above the ceiling is directly introduced from outside the soundproof case 1 in the third embodiment. That is,
The third embodiment differs from the first embodiment in the following points. First, when the ceiling plate 27 has a double wall structure for noise reduction, the ceiling duct 49 is not provided in the intake duct chamber 34 as in the first embodiment, and as shown in FIG. An outside air inlet 70 for cooling the fan motor, which communicates with the cavity 33, is provided at a predetermined position of the side plate 69 of the 27. In FIG. 5, reference numeral 96 denotes a sound absorbing material, and reference numeral 97 denotes an anti-vibration structure for preventing vibration of the lower ceiling plate 32 from being transmitted to the upper ceiling plate 31. The gap d between the side plate 69 of the ceiling plate 27 and the upper ceiling plate 31 is provided so as not to transmit the vibration of the soundproof case 1 to the upper ceiling plate 31.

Second, as shown in FIGS. 6A and 6B,
The gap d between the side plate 69 of the ceiling plate 27 and the upper ceiling plate 31 is wide on the intake duct chamber 34 side and narrow on the exhaust duct chamber 36 side, and the outside air inlet 7 is located on the low temperature side.
0 is provided. By adopting the first configuration, compared to the configuration in which the main ventilation wind 60 and the ceiling cooling air 52 are branched as in the first embodiment, the ceiling cooling air 52 does not pass through the air inlet 46. In addition, the intake port 46 can be made smaller and noise can be reduced. Also,
Since the main ventilation wind 60 and the ceiling cooling air 52 are sucked through separate openings, the size of the openings can be set independently and appropriately, so that noise can be reduced and the ceiling cooling air 52 can be freely matched. The degree can be increased. Furthermore, this configuration has an advantage that the amount of fan cooling air is not affected even when the extension duct is attached to the intake duct cover.

By adopting the second configuration, in the soundproof case 1, the temperature on the intake duct chamber 34 side is low and the temperature on the exhaust duct chamber 36 side is high. 52 can be introduced, and the effect of cooling can be enhanced. FIG. 7 is a longitudinal sectional view of a main part showing a modification of the third embodiment. In this modification, a cylindrical air guide plate 71 is provided in parallel with the motor unit 45a in order to sufficiently cool the motor unit 45a of the ventilation fan 45.

[0026]

Fourth Embodiment FIG. 8 is a view for explaining a fourth embodiment of the cogeneration system according to the present invention.
In the fourth embodiment, the cooling air 52 above the ceiling is sucked by the negative pressure of the intake air of the engine, and the motor 45 of the ventilation fan 45 is rotated.
a is cooled.

Specifically, a case 74 is fixed to the motor opening 51 of the lower ceiling plate 32 so as to face the motor opening 51.
4, the motor portion 45 a of the ventilation fan 45 is inserted, and the intake passage 75 of the air cleaner 73 is communicated. According to this configuration, the cooling air 52 above the ceiling can be sucked by the negative pressure of the intake air of the engine, and the cooling performance of the ventilation fan 45 can be improved. In addition, low-temperature air is supplied to the engine through the air cleaner 73. Since the air is sucked, the intake efficiency can be improved.

[0028]

Fifth Embodiment FIGS. 9A to 9F show a fifth embodiment of the present invention.
It is an explanatory view for explaining an embodiment. The fifth embodiment is applied to a soundproof engine in which an engine and a working machine are housed inside a soundproof case. The cogeneration device described above is also a kind of the soundproof type engine. This fifth
An object of the embodiment is to provide a detachable side plate at a lower cost than a double door material. Conventionally, in order to check and maintain the inside of the cogeneration system, there is a known structure in which the front panel is configured as a double-door door material, but since the door material rotates to completely open the door material. There is a problem that a large space is required and the manufacturing cost is increased. Therefore, conventionally, a detachable plate mounting structure for the soundproof case 1 has been proposed, in which a detachable side plate (hereinafter, referred to as a detachable plate) is attached to one side surface of the soundproof case 1 that houses the engine as shown in FIG. Was.

In this detachable plate mounting structure, a detachable detachable plate 7 is provided on one side of the soundproof case 1 for housing the engine.
6, at least on the side of the soundproof case 1 on which the removable plate 76 is mounted, a mounting wall 77 at an upper position, a ceiling plate 79 having a hanging wall 78 surrounding the mounting wall 77 from above, A projecting engagement portion 81 provided on the base portion 80 of the case 1 is provided. The detachable plate 76 is composed of a plate 82 and a locking member 83 formed at a predetermined position below the plate 82. Further, the engaging portion 8 of the locking member 83
4 and the projecting engaging portion 81 are engaged with each other.
When the detachable plate 76 is pivoted toward the mounting wall 77 side of the soundproof case with the fulcrum as a fulcrum, the length of the hanging wall 78 and the locking member 83 of the detachable plate 76 so that the upper part of the detachable plate 76 does not interfere with the hanging wall 78. Mounting position is set. And the detachable plate 7
The detachable plate 76 is fixed to the soundproof case 1 by a fixing means such as a screw with the 6 abutting on the mounting wall 77.

However, in this conventional configuration, the ceiling plate 7
9 is set so that the hanging wall 78 and the upper portion of the detachable plate 76 do not interfere with each other, so that a gap S is formed between the hanging wall 78 and the upper portion of the detachable plate 76 after installation, There was a possibility that the intrusion of the intrusion could not be sufficiently prevented. Therefore,
The fifth embodiment shown in FIGS. 9A to 9E has a configuration in which a detachable detachable plate 76 is attached to one side surface of the soundproof case 1 that houses the engine, as shown in FIG. 9A. At least on the side of the soundproof case 1 where the detachable plate 76 is mounted, a ceiling plate 79 having a mounting wall 77 at an upper position, a hanging wall 78 surrounding the mounting wall 77 from above, and a soundproof case 1 Projection engaging portion 81 provided on base portion 80
The detachable plate 76 includes a plate 82 and the plate 82
And a fixing member 87 formed at a predetermined position in the lower portion of the sound-proof case 1. The detachable plate 76 is fixed to the soundproof case 1 by a fixing means such as a screw while the detachable plate 76 is in contact with the mounting wall 77. As shown in FIG. 9 (D), in the detachable plate mounting structure of the soundproof case, the locking member 87 includes an upper engaging portion 88 at a position away from the plate member 82 and a plate member 82.
As shown in FIG. 9 (A), when the upper engaging portion 88 and the protruding engaging portion 81 are engaged, the detachable plate 76 is provided. Is set to such a length that the portion of the plate 82 below the mounting position of the locking member 87 of the plate 82 is brought into contact with and supported by the base portion 80 of the soundproof case 1 even when it is tilted forward. When attaching the detachable plate 76 to the soundproof case 1, as shown in FIG. 9A, the corner (see FIG. 9E) of the upper engaging portion 88 of the engaging member 87 is engaged with the projecting engaging portion 81. In the assembled state, the detachable plate 76 is rotated to the soundproof case 1 side with the upper locking portion 88 as a fulcrum to be in a contact state, and then, through the state of FIG.
As shown in FIG. 9 (C), by lifting the detachable plate 76 upward and moving it toward the soundproof case 1, the projecting engagement portion 81 is formed.
To the lower engaging portion 89 of the locking member 87, and
The detachable plate 76 is fixed to the soundproof case 1 by the fixing means in a state where the upper portion 6 is positioned above the hanging wall 78.

As shown in FIG. 9 (D), the angle from the upper engaging portion 88 to the lower end contact surface 90 of the attaching / detaching plate 76 is set to an angle θ which is easy to mount. 9 (E) is a partially enlarged view of the state of FIG. 9 (A). In the state of FIG. 9 (A), the corner of the upper locking portion 88 of the locking member 87 is engaged with the protruding engaging portion 81. The state which engages is shown. According to the characteristic configuration of the fifth embodiment, the detachable plate 76 is provided inside the ceiling plate 79.
Since the upper end of the cover enters, rainwater can be prevented from entering. Further, even in a state where the detachable plate 76 is tilted to the front side in a state where the upper locking portion 88 and the protruding engagement portion 81 are locked, the plate member 82 located below the mounting position of the locking member 87 of the plate member 82 can be removed. Since the portion is set to a length that is supported by the base portion 80 of the soundproof case 1, even if the hand is released from the detachable plate 76, the detachable plate 7
There is an advantage that workability is improved in the work of attaching the detachable plate 76 without falling down.

[0032]

Sixth Embodiment FIG. 10 is a longitudinal sectional view of a main part of a cogeneration apparatus for explaining a sixth embodiment according to the present invention. In the sixth embodiment, the generator control panel of the generator is arranged along the intake duct chamber 34, and the generator control panel 1
2 and a side plate of the soundproof case 1 or the generator control panel 12 and a wall in the intake duct chamber 34, a resonance chamber 94 is formed, and the resonance chamber 94 silences low-frequency sound leaking from the intake port. And As shown in FIG. 10, a generator control panel 1 is provided in a space above the generator 3 in the intake duct chamber 34.
2 are arranged in the vertical direction, and the back of the control panel 12 is
Installed toward the side where passes. In this embodiment, the resonance chamber 94 sealed by the left face plate 25 of the soundproof case 1, the generator control panel 12, the upper auxiliary plate 92 and the lower auxiliary plate 93.
Is composed. In FIG. 10, reference numeral 98 denotes a communication pipe communicating with the intake duct cover 48. With this configuration, there is no need to provide a special resonance chamber for noise reduction, and the low-frequency sound leaking from the engine intake hole 95 can be effectively silenced by the resonance chamber 94. Further, since the periphery of the generator control panel 12 is an intake duct, the generator control panel 12
Temperature rise can be suppressed. Furthermore, since the generator control panel 12 is sealed in the resonance chamber 94 and air does not flow directly,
It is preferable because dust and dust do not enter.

In this embodiment, the intake duct chamber partition plate 42 is provided with the engine intake hole 95 communicating with the engine air cleaner 73, so that the engine intake air is sucked into the air cleaner through the periphery of the reserve tank 43. Therefore, the engine intake noise is not directly emitted from the intake port 46 to the outside.

[Brief description of the drawings]

FIG. 1 is a schematic front longitudinal sectional view of a cogeneration apparatus showing a first embodiment of the present invention.

FIG. 2A is a longitudinal sectional view of an exhaust port side of a soundproof case, and FIG. 2B is a perspective view around a cooling water pump.

FIG. 3 is a schematic diagram of a cogeneration apparatus.

FIG. 4 is a view for explaining a third embodiment of the present invention, and is a cross-sectional view of a main part on the exhaust port side of a soundproof case.

FIG. 5 is a view for explaining a third embodiment of the present invention, and is a longitudinal sectional view of a main part of a ceiling plate.

6 (A) and 6 (B) are views for explaining a third embodiment of the present invention. FIG. 6 (A) is a longitudinal sectional view of a main part of a ceiling plate, and FIG. (B) is a perspective view of the ceiling plate.

FIG. 7 is a longitudinal sectional view of a main part showing a modification of the third embodiment.

FIG. 8 is a view for explaining a fourth embodiment of the cogeneration apparatus according to the present invention, and is a longitudinal sectional view of a main part of an upper part of a soundproof case.

9 (A) to 9 (F) are explanatory views for explaining a fifth embodiment of the present invention, and FIGS. 9 (A) to 9 (E) are for explaining the fifth embodiment. FIG. 9 (F) is a diagram showing a conventional configuration.

FIG. 10 is a longitudinal sectional view of a main part of a soundproof case for explaining a sixth embodiment of the present invention.

[Explanation of symbols]

1. Soundproof case, 2. Gas engine, 3. Generator, 5.
Exhaust gas heat exchanger, 6: Heat exchanger for hot water supply, 9: Cooling water pump, 21: Hollow base, 27: Ceiling, 31: Upper ceiling, 32: Lower ceiling, 33: Cavity, 35 ... Engine accommodation room, 45 ... Ventilation fan, 45a ... Motor part, 4
6 ... intake port, 49 ... ceiling opening, 51 ... motor opening, 52
... cooling air above the ceiling, 53 ... exhaust port, 56 ... gas piping room, 5
7 ... Ventilation opening for gas piping room, 59 ... Cooling gap, 60 ... Main ventilation air, 61 ... Cooling air for gas piping room, 63 ... Base side plate, 6
6 ... opening for accommodation room, 70 ... outside air inlet.

Claims (3)

[Claims] In a cogeneration system having an engine (2), a generator (3), and a heat exchanger (5, 6) provided in a soundproof case (1), an intake port (46) is provided on a side wall of the soundproof case (1). ) And an exhaust port (53), a ventilation fan (45) is provided on the upper side near the exhaust port (53) of the soundproof case (1), and the ceiling plate (27) of the soundproof case (1) is (31) and the lower ceiling plate (32) have a double structure,
3), an outside air intake passage communicating the outside of the soundproof case (1) with the hollow portion (33) is provided, and a motor opening (51) is provided on the lower ceiling plate (32) on the exhaust port (53) side. The motor opening
(51), the motor part (45) of the ventilation fan (45)
a), and by driving the ventilation fan (45), the main ventilation wind (60) for exhausting the outside air taken in from the intake port (46) through the exhaust port (53) is generated, so that the inside of the soundproof case (1) is generated. The outside air intake passage, cavity (33), motor opening are introduced into the soundproof case (1), which has become negative pressure by driving the ventilation fan (45).
(51) By taking in the outside air through the ventilation fan
Cooling air above the ceiling (5) for cooling the motor part (45a) of (45)
2) to generate the motor part (45a) of the ventilation fan (45)
A cogeneration device characterized by preventing overheating of the cogeneration system. 2. A cogeneration system in which a gas engine (2), a generator (3), and a heat exchanger (5, 6) are provided in a soundproof case (1). 4
6) and an exhaust port (53), a ventilation fan (45) is provided on the upper side near the exhaust port (53) of the soundproof case (1), and the engine housing chamber (35) is provided in the soundproof case (1). The gas pipe chamber (56) is provided with an isolated gas pipe chamber (56), and gas supply elements such as gas valves are collectively housed in the gas pipe chamber (56). The engine housing chamber (35) is located above the gas pipe chamber (56). ), And the base of the soundproof case (1) is configured as a hollow base (21) having a hollow (30), and the hollow base (21) is provided.
A ventilation port (57) for the gas piping chamber is provided on the base side plate (63) of the, and communication paths (64, 65) communicating from the ventilation port (57) for the gas piping chamber to the gas piping chamber (56) are provided. By driving (45), a main ventilation wind (60) for exhausting the outside air taken in from the intake port (46) through the exhaust port (53) is provided to ventilate the inside of the soundproof case (1), and the ventilation fan (45) ), The hollow base (21)
External air is sucked in from the ventilation port (57) for the gas
(64, 65), gas piping room (56), opening for accommodation room (6
A cogeneration apparatus characterized by generating a cooling air (61) for a gas piping chamber flowing into an engine housing chamber (35) through 6). 3. A cogeneration system in which a gas engine (2), a generator (3), and a heat exchanger (5, 6) are provided in a soundproof case (1). (46) and an exhaust port (53), a ventilation fan (45) is provided on the upper side near the exhaust port (53) of the soundproof case (1), and an engine housing (35) is provided in the soundproof case (1). A gas supply chamber such as a gas valve and an electric cooling water pump (9) are provided in the gas supply chamber (56) which is isolated from the gas supply chamber.
And a cooling gap (59) provided at a position corresponding to the cooling water pump (9) at the wall of the gas pipe chamber (56) and communicating with the engine housing chamber (35). Ventilation port (57) for gas piping room communicating with chamber (56)
Is provided on the side wall of the soundproof case (1). By driving the ventilation fan (45), the main ventilation wind (60) that exhausts the outside air taken in from the intake port (46) through the exhaust port (53) is soundproofed. The inside of the case (1) is ventilated, and by driving a ventilation fan (45), outside air is sucked from the gas pipe room ventilation opening (57) on the side wall of the soundproof case (1), and the gas pipe room (56) is cooled. (59) via engine housing
A cogeneration apparatus characterized by generating a cooling air (61) for a gas piping chamber flowing into (35).