JPH0138180B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat exchanger using an engine used as a heat pump system for heating and cooling.

(Prior art) Generally, in this type of heat pump system, the engine for driving the compressor is immersed in water or other heat medium liquid in a liquid tank, and the heat of the engine is used to heat the heat medium. There is. The upper opening of the liquid tank is closed with a lid, and
The lid is covered with a cover from above, and an intake silencer, working equipment, oil cleaner, and other auxiliary equipment are installed in the space between the lid and the cover. However, when the intake silencer is housed in the cover interior space in this way, there is a problem in that the capacity of the intake silencer cannot be sufficiently increased due to relationships with other equipment, and intake noise cannot be sufficiently reduced. Furthermore, since the conventional cover has low rigidity, there is also the problem that engine noise is transmitted from the cover to the outside.

(Object of the Invention) In order to solve the above-mentioned conventional problems, the present invention aims to improve the cover structure, etc., and increase the capacity of the intake silencer.

(Structure of the Invention) The present invention disposes an engine in a liquid tank storing heat medium liquid, covers the top opening of the liquid tank with a lid, covers the lid with a cover from above, and places the engine between the lid and the cover. The auxiliary equipment is installed, a large-diameter opening is provided at the upper end of the cover lid for auxiliary equipment maintenance, and the large-diameter opening is covered with a removable large-diameter cover, and the cover lid is made hollow so that the engine air cleaner can be installed in the internal space. It is characterized by providing an element and forming an intake silencer with a cover lid.

(Example) In FIG. 1, which is a partially cutaway schematic front view, a liquid tank 2 is housed in an outer cylinder 1 that opens upward. Water W for a heat medium or other liquid is stored in the liquid tank 2, and an engine 3 is installed in the water W. In order to utilize the water W heated by the engine 3 as a heat source, a pipe P is spirally provided inside the liquid tank 2 along its inner peripheral surface. The pipe P is connected to a water heater, a space heater, etc. on the outside.

Engine 3 is crankshaft 5 (only the center line is shown)
is installed vertically, and the crankcase 6
against cylinder block 7 and cylinder head 8
are arranged horizontally. An exhaust heat exchanger 10 is provided below the cylinder head 8, and an exhaust pipe 11 extending downward from the lower surface of the cylinder head 8 is connected to the exhaust heat exchanger 10. An exhaust silencer 12 is provided below the crankcase 6, and the exhaust heat exchanger 10 and the exhaust silencer 12 are connected to a connecting pipe 13.
are connected via. A gear case 15 is provided below the crankcase 6, and an exhaust heat exchanger 1
0 is fixed to the gear case 15 via a bracket 16. An oil tank 17 is provided below the gear case 15, and an exhaust silencer 12 is attached to a stay 18 fixed to the oil tank 17. An exhaust pipe 20 is connected to the bottom of the exhaust silencer 12. The exhaust pipe 20 is the outer cylinder 1
It extends to the outside of the exhaust silencer 12 to discharge condensed water inside the exhaust silencer 12.

The crankshaft 5 projects upward from the crankcase 6, and a flywheel (not shown) is fixed to the projecting end thereof. The flywheel is water W
It is located below the water surface Wa and is surrounded by the flywheel housing 23 from below and around it. The housing 23 is bolted to the crankcase 6 in a watertight manner. An input shaft (not shown) of a working machine 31 is connected to the upper end of the flywheel. Specifically, the working machine 31 is a compressor or generator for an air conditioner, a pump for hot water circulation, or the like.

A mounting flange 33 made of an annular plate is fixed to the upper end of the flywheel housing 23. The working machine 31 is fitted onto the inner periphery of the flange 33 from above and secured with bolts. An oil cleaner 35, an oil supply port (not shown), etc. are attached to the upper surface of the flange 33 around the working machine 31.

The outer periphery of the flange 33 is supported from below by the inner periphery of an annular engine mount 41 (mounting plate) via vibration isolating rubber 42 . The gap between the outer circumference of the flange 33 and the inner circumference of the mount 41 is a seal 4.
It is sealed by 3. The outer peripheral portion of the mount 41 is seated on an annular large diameter portion 45 at the upper end of the liquid tank 2 via a seal 46 . As is clear from the above description, the flange 33 and the mount 41 constitute a lid 48 that closes the upper end opening of the liquid tank 2. mount 41
is fixed to the large diameter portion 45 together with a cover 47 by a plurality of vertical bolts 44 .

The cover 47 is a generally annular member whose outer peripheral edge fits into the upper end of the outer cylinder 1. The outer cylinder 1 protrudes upward from the liquid tank 2, and the annular body 4 of the cover 47
9 and the lid 48, the working machine 31 and the oil cleaner 3
A chamber 50 is formed in which 5 etc. are accommodated.

In addition to the above equipment, the chamber 50 is provided with a mixer 51. The mixer 51 is a device used only when a gas engine is used, and serves to mix air and fuel gas. Also, when the engine 3 uses only fuel oil as fuel, the mixer 51
A simple joint is used instead.

The mixer 51 is fixed to the upper surface of the flange 33. The intake outlet of the mixer 51 is connected to the intake inlet of the cylinder head 8 via an intake pipe 40.
The mixer 51 has an intake inlet pipe joint 52 at its upper end, and the joint 52 is connected to an outlet pipe 56 of an intake silencer 55 via an elastic joint 53.

The case 57 of the silencer 55 is flat and has a slightly larger outer diameter than the flange 33.
It is fixed to an inward flange 59 at the upper end with a plurality of bolts 60. The cover 47 is an annular body 49
The inward flange 59 is integrally provided with a cylindrical flange 61 that protrudes upward from the inner periphery of the flange 6.
It is formed at the upper end of 1. As is clear from the above description, the cover 47 has a large diameter opening 62 surrounded by a flange 61 at its upper end, and the silencer 55 forms a cover lid that closes the opening 62. The cover 47 is integrally provided with a cylindrical leg portion 63 extending from the outer periphery of the main body 49 to the upper surface of the mount 41, and a sound absorbing material 64 is attached to the inner surfaces of the leg portion 63, the main body 49, and the flange 61.

A large diameter cylindrical duct 65 is located above the cover 47.
(case) is provided. When the working machine 31 is a heating and cooling compressor, a device indicated by the reference numeral 67 is used as an outdoor unit heat exchanger. Duct 6
5 is fixed to the cover 47 or the upper end of the outer cylinder 1,
A ventilation fan 66 is provided inside one open end. The internal passage 68 of the duct 65 and the internal chamber 5 of the cover 47 are located approximately in the center of the intake silencer 55.
A ventilation passage 69 is provided to connect the two.

2 is an enlarged partial view of FIG. 1, and FIG. 3 is a view taken in the direction of the − arrow in FIG. 2. In FIG. -0. The upper case 70 and the lower case 71 have approximately the same dimensions and shape, and have a plurality of bolts 74 on their outer peripheries.
are fixed to each other by. The case 57 has a hollow structure as a whole, and a silencing chamber 72 is formed almost throughout the interior. A sound absorbing material 73 is pasted on almost the entire inner surfaces of the upper case 70 and the lower case 71. The ventilation port 69 is separated from the sound absorption chamber 72 by a cylindrical portion 75 of the case 57.

The pipe 56 is fitted into a hole on the outer periphery of the lower case 71 and is fixed. A vertical cylindrical air cleaner element 77 is provided inside the silencer 55 above the pipe 56. The upper case 70 has a hole 7 for mounting an element 77.
It is equipped with 8. The element 77 protrudes above the hole 78 and is covered from above by a bowl-shaped element cover 80. The element cover 80 is fixed to the upper case 70 around the hole 78 with a plurality of bolts 81. A urethane seal 82 is interposed between the upper end of the element 77 and the element cover 80, and the element 77
A urethane seal 82 is also interposed between the lower end of the lower case 71 and the lower case 71 .

As shown in FIG. 3, an intake port 83 is provided on the opposite side of the element cover 80 with the ventilation port 69 in the center. As shown in FIG. 2, the intake port 83 is formed by a pipe 84 fitted into a hole in the outer periphery of the upper case 70.

(Function) In FIG. 1, in the operating state, the engine 3 drives the working machine 31, and the engine 3 heats the liquid in the pipe P via the water W. In this case, engine combustion air enters the sound absorption chamber 72 from the passage 68 through the intake port 83, and enters the sound absorption chamber 72 through the element 77.
After being filtered through the mixer 51 and the intake pipe 4
It is sent to the cylinder head 8 via 0 etc.

In this intake operation, the sound absorption chamber 72 of the intake silencer 55 has a large volume, and the inner surface is covered with a sound absorbing material 73, so that intake noise is sufficiently muffled. Further, since the case 57 is a hollow structure and has high rigidity, vibration of the case 57 and noise transmission due to the vibration are largely prevented.

During operation, the fan 66 closes the passage 68 and the ventilation opening 6.
Since the room 50 is ventilated through the air vent 9, the room 50 does not become hot. Therefore, a significant temperature rise in the working machine 31 and other equipment is prevented, and durability is improved. Moreover, since the silencer 55 is flat and the length of the ventilation port 69 is short, the resistance of the ventilation port 69 to the air flow is small. Therefore, the ventilation efficiency by the fan 66 is maintained at a sufficiently high level.

When performing maintenance and inspection of the work equipment 31 or oil cleaner 35, or when replenishing oil from the oil supply port in the chamber 50, the bolt 60 is removed.
The entire silencer 55 is removed. Then, the large-diameter opening 62 of the cover 47 is opened, so that the above-mentioned maintenance and inspection work and oil replenishment work can be performed through the wide opening 62, making the work easier.

When replacing the air cleaner element 77, there is no need to disassemble the case 57 vertically.
The element 77 can be easily replaced by simply removing the small element cover 80.

(Effects of the Invention) As explained above, according to the present invention, the lid 48 of the upper end opening of the liquid tank 2 is covered with the cover 47 from above,
Since the auxiliary equipment of the engine 3 is installed between the lid 48 and the cover 47, and the large diameter opening 62 for auxiliary equipment maintenance is provided at the upper end of the cover 47, maintenance of the auxiliary equipment can be performed extremely easily. Moreover, the cover lid 55 that closes the large diameter opening 62 is made hollow, and the air cleaner element 77 of the engine 3 is provided in the internal space 72, and the intake silencer 55 is formed by the cover lid, so that the capacity of the silencer 55 can be set large. Therefore, the silencing effect of the silencer 55 can be sufficiently enhanced. Also, since a hollow silencer 55 is placed above the liquid tank 2,
It is also possible to effectively prevent engine noise from being radiated upward.

(Other Examples) The outer cylinder 1 can also be abolished. Sound absorbing material 64,
One or both of the sound absorbing materials 73 can be eliminated, and the sound absorbing materials 64 and 73 can also be partially eliminated.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway schematic front view of the embodiment, Fig. 2 is an enlarged partial view of Fig. 1, and Fig. 3 is a - of Fig. 2.
It is an arrow view. 2...Liquid tank, 3...Engine, 35...
Oil cleaner (auxiliary equipment), 47...Cover, 48...
Lid, 55...Intake silencer, 62...Sound absorption chamber (space), 77...Air cleaner element, W...Water (heat medium liquid).

Claims (1)

[Claims] 1 Place the engine in a liquid tank containing heat transfer liquid, cover the top opening of the liquid tank with a lid, cover the lid with a cover from above, install the engine auxiliary equipment between the lid and the cover, and close the cover. A large-diameter opening for auxiliary equipment maintenance is provided at the upper end, and the large-diameter opening is covered with a removable large-diameter cover lid.The cover lid has a hollow structure and an air cleaner element for the engine is provided in the internal space. A heat exchanger using an engine characterized by forming an intake silencer.