JP3348983B2 - Cooling system for engine driven air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for an engine-driven air conditioner.

[0002]

2. Description of the Related Art As an engine-driven air conditioner, there is an air conditioner in which an engine is arranged in a forward inclined state and an exhaust gas heat exchanger is arranged below the inclined axis. As a cooling device for this type of device, there is a cooling device in which a heat exchanger for engine cooling water is disposed in an outdoor heat exchange chamber disposed above an engine room.

[0003]

In the above-described engine-driven air conditioner, depending on the specific structure of the cooling water pipe between the engine and the heat exchanger for engine cooling water, air bleeding in the pipe is not possible. In some cases, it cannot be performed smoothly. Further, in the case where the exhaust gas heat exchanger is provided, a problem of air removal in the cooling water circulation circuit to the heat exchanger also occurs. In particular, when the cooling water is drained from the cooling water circuit for engine inspection and cooling system inspection, the cooling water is injected again,
When the operation is resumed, if air can not be vented smoothly,
There arises a problem that the engine temperature rises abnormally or the heat exchange property of the accumulator with the refrigerant decreases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional situation, and it is possible to easily and surely bleed air from a cooling water pipe, and to reduce the heat exchange with a refrigerant in an engine driven air. An object of the present invention is to provide a cooling device for a harmony device.

[0005]

According to a first aspect of the present invention, there is provided an engine room in which an engine is disposed, and a pipe for connecting each device.
And a heat exchanger on the front and rear sides.
Disposed at the upper end opening of the outdoor heat exchange chamber
In the cooling device of an engine driving type air conditioner having a blower fan for the outdoor heat exchanger that is, the engine room and distribution
The pipe chamber and the outdoor heat exchange chamber are defined by a partition plate, and the heat exchange
The converter is tilted inward downward from the position near the front and rear sides.
The lower end of the heat exchanger is placed on the partition plate.
Ventilation so that it is located between parts and on the engine room ceiling
Exhaust vent and ventilate the outside air into the engine room.
To the outdoor heat exchange chamber through the ventilation outlet
And each pipe connecting the heat exchanger with each device in the piping chamber.
The path between the lower ends of the heat exchangers of the partition plate.
At the end and the sealing package located at the end.
The pipes are arranged so as to pass through the inside of the
It is characterized by being sealed with a pad .

[0006]

[0007]

[0008]

According to the first aspect of the present invention, the heat exchanger is arranged to be inclined.
The ventilation outlet is provided between the lower ends of the
The hot air inside does not pass through the heat exchanger.

In addition, the heat exchanger is connected to each device in the piping room.
Pipes are routed together and pass through one pad
Is sealed.

[0010]

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 35 are views for explaining an engine-driven air conditioner according to an embodiment of the present invention, and FIGS. 1 to 4 are front, rear, and right side views of FIG. III-III section), left side view (IV-IV in Fig. 2)
5 is a schematic plan view of the floor of the outdoor heat exchange chamber,
FIG. 6 is a schematic cross-sectional plan view of the engine room and the piping room, and FIGS.
Fig. 9 is a partial cross-sectional front view of the engine, Fig. 9 is a partial cross-sectional front view, Fig. 10 shows a flow of lubricating oil, Fig. 11 shows an oil separation chamber, and Fig. 12 shows an intake and exhaust system. FIG.
Is a sectional view showing a partition plate portion of the intake and exhaust passages, and FIGS.
17 is a diagram for explaining various piping systems, FIGS. 18 to 30 are diagrams showing respective main parts, FIGS. 31 to 34 are overall configuration diagrams, and FIG. 35 is a flowchart diagram.

FIG. 3 is a diagram showing the overall configuration of the apparatus of the present embodiment.
In 1, 1 is an engine-driven air conditioner,
This is composed of an outdoor air conditioning unit 2 and an indoor air conditioning unit 3. The indoor air-conditioning unit 3 includes a refrigerant indoor heat exchanger 4, a decompression expansion valve 18, and a not-shown indoor heat exchange blower fan. The outdoor air-conditioning unit 2 includes an engine room 7 in which an engine 5, a compressor 6, 6, and the like are disposed, a main accumulator 8, a sub-accumulator 9, an electrical box 50, and a pipeline connecting each device. A piping chamber 10 is provided, and an outdoor heat exchange chamber 14 in which a refrigerant outdoor upper and lower heat exchangers 11 and 12 and an engine cooling water heat exchanger (hot water heat exchanger) 13 are disposed. I have. As can be seen from FIG. 4, two symmetrical upper heat exchangers 11 are arranged upside down, but in FIG. 31, only one is shown for convenience.

The engine 5 is a water-cooled gas fueled engine. An intake pipe 21a is connected to an intake port of the engine 5, and a gas mixer 21b and an air cleaner 21c are interposed in the intake pipe 21a. The tube 21a penetrates the top wall of the engine room 7 and the top wall of the outdoor heat exchange chamber 14 and opens to the outside. The intake pipe 21a may be opened in the engine room 7 as described later.

The gas mixer 21b is connected to a supply pipe from an external gas fuel source in the terminal chamber 22 by a gas pipe 22d. A gas mixer 21 is connected to the gas line 22d.
b, a flow control valve 22a, a zero governor (reducing valve) 22b, and two solenoid valves 22c are interposed. The exhaust port of the engine 5 has an exhaust pipe 23a.
Is connected to the exhaust pipe 23a.
b, an exhaust silencer 23c and a mist separator 23d are interposed, and the exhaust pipe 23a is opened outside the heat exchange chamber 14. The mist separator 23d is shown in FIG.
2 may be arranged outside the top wall of the heat exchange chamber 14 as described later. Reference numeral 24a denotes an oil tank for storing lubricating oil. When the amount of lubricating oil in the oil pan decreases, the solenoid valve 24b is opened by a lubrication control device described later, and lubricating oil is supplied by gravity.

A clutch 6a,
The compressors 6, 6 are connected via 6a. A discharge port of the compressor 6 is connected to the refrigerant outdoor upper and lower heat exchangers 11 and 12 through refrigerant pipes 200 and 16a, a four-way valve 15 switched to a cooling operation position, and a refrigerant pipe 16b. The two heat exchangers 11 and 12 are connected to the refrigerant line 17a from the refrigerant indoor heat exchanger 4 in the terminal room 22 through the refrigerant line 16c, the heat exchanger in the main accumulator 8, and the refrigerant line 101. 101a.
Reference numeral 102 denotes a dryer, and reference numeral 103 denotes a filter that bypasses the dryer.

The refrigerant line 17b from the indoor heat exchanger 4 is connected to the refrigerant line 100 from the outdoor unit in the terminal room 22 by a joint 100a.
The refrigerant line 100 is connected to the suction ports of the compressors 6 and 6 via a four-way valve 15, a refrigerant line 16d, a main accumulator 8, a refrigerant line 202, a sub-accumulator 9, and a refrigerant line 201. In addition, 300 and 301 are capillary tubes, 210 and 210 are each a combination of a temperature detector and a capillary tube, and are for detecting the cooling temperature to detect the level of the liquid-phase refrigerant in the accumulator 8. is there. Reference numeral 302 denotes an open / close valve, and 303 denotes an oil discharge passage. When the amount of oil accumulated in the lower part of the accumulator increases, the open / close valve is opened manually or automatically so that oil flows from the accumulator 8 to the sub-accumulator 9.

An oil separator 19a for separating the lubricating oil in the refrigerant is interposed between the refrigerant pipes 200 and 16a. When the amount of the lubricating oil separated by the separator 19a exceeds a predetermined value. , Oil strainer 19b,
It is returned to the main accumulator 8 via the solenoid valve 19c that opens when the predetermined value is exceeded. The lubricating oil is also returned to the sub accumulator 9. In addition, the refrigerant pipe 16a
Is connected to the main accumulator 8 via an oil strainer 20a and a solenoid valve 20b which opens when the pipe pressure is equal to or higher than a predetermined pressure, thereby avoiding an abnormal rise in refrigerant pipe pressure.

The cooling jacket 28 of the engine 5
b, when the cooling water temperature is equal to or lower than a predetermined value, the cooling water pump 28a, the water pipe 29a, and the cooling jacket 28
b, water line 29a ', switching valve (thermostat valve)
A cooling jacket circulating circuit (engine cooling water circulating circuit), which is one of low-temperature circulating circuits for circulating cooling water through the path of 28c and the water conduit 29s, is configured.

When the cooling water temperature exceeds a predetermined value,
Cooling water pump 28e, water line 29e, exhaust gas heat exchanger 23b, water line 29e 'cooling water pump 28a, water line 2
9a, cooling jacket 28b, water line 29a ', switching valve 28c, water line 29b, three-way valve 28d, water line 29
c, a high-temperature circulation circuit for circulating the cooling water through the path of the cooling water heat exchanger 13, the water pipes 29d and 29p, and the cooling water pump 28e. The switching valve 28c
Is switched to the low temperature circulation position, the cooling water from the cooling water pump 28e flows in the direction of the water pipe 29b through the bypass passage 29r. That is, the exhaust gas heat exchanger circulation circuit, which is another low temperature circulation circuit, is configured. As a result, the exhaust heat of the exhaust gas heat exchanger 23b is discarded by the cooling water heat exchanger 13 through the three-way valve 28d, or is supplied to the refrigerant by the heater 29g of the accumulator 8. As a result, the exhaust heat can be used even during warm-up at the time of start-up, which is particularly effective when a rapid rise of heating is required.

In the above-mentioned cooling system, reference numeral 30a denotes a cooling water reservoir tank, which comprises a water pipe 30c, an inlet 30
b, it is connected to the cooling water heat exchanger 13. As will be described later, an injection port independent of the injection port 30b is disposed above the cooling water reservoir tank, and one of the switching valves 28c is provided at the injection port 30b.
One port is also connected. The port is always in communication with the cooling water jacket 28b via a throttle, thereby enabling air to be vented from the cooling jacket circulation circuit.
When the three-way valve 28d is switched, the engine cooling water is supplied to the main accumulator 8 by the water pipe 29d.
Is supplied to the heater 29g, thereby supplying heat to the refrigerant. 90 is an electromagnetic valve, 89 is an oil strainer. When the load on the indoor unit 4 during cooling is particularly small, the electromagnetic valve 90 opens to allow the refrigerant to bypass the indoor unit 4 and flow to the accumulator 8 to balance the load. I take it.

Next, a specific structure of the outdoor air conditioning unit 2 will be described with reference to FIGS. The casing 31 of the outdoor air-conditioning unit 2 has a floor plate 33 placed and fixed on a pair of bases 32, and columns 34 are erected at four corners, and the upper ends of the four columns 34 are placed on the right side and the left side. On the surface, each is connected by one ceiling beam (not shown), the front and rear ends of the floor plate 33 are bent to form a floor beam 33a, and the left and right sides are left and right sides 37c and 37d. It has a structure covered with a plate 37e. The ceiling plate 37e is formed with a connection portion with each side plate or with each column 34 by bending the front, rear, left and right end portions.
Further, as shown in FIG. 34, the front side surfaces of the left and right front side plates 37a, 37a, whose upper ends are bent, are respectively attached to the bent engine room side partition plates 41a, 41b with mounting screws 35.
Has been concluded. Similarly, the rear side surface is provided on the bent pipe chamber side partition plates 42a, 42b with the left and right rear side plates 37b, 37b as viewed from the front with the upper ends bent.
Is installed. The front and rear plates 37a and 37b cover the lower portions of the front and rear surfaces of the casing 31, and the left and right plates 37c and 37d cover the entire left and right surfaces of the casing 31. And before and after these,
The left and right plates 37a to 37d are detachable to ensure maintainability of each device.

The upper portions of the front and rear side plates 37a and 37b on the front and rear sides of the casing 31 are provided with openings for introducing outside air. Wire meshes 38a and 38b functioning as filters are provided in the respective openings. 36b are detachably mounted on the upper and lower sides of each of them. A discharge opening 37f for discharging the introduced outside air upward is formed in the top plate 37e, and the outside air is supplied to the wire mesh 3 in the discharge opening 37f.
An outdoor heat exchange blower fan 44 for sucking air from the portions 8a and 38b into the outdoor heat exchange chamber 14 and discharging the air above the outdoor heat exchange chamber 14 is provided. Reference numeral 38c denotes a wire net standing upright around the discharge opening 37f.

The partition plate 39 is used to define the outdoor heat exchange chamber 14, the engine room 7, and the piping room 10, and includes a central partition plate 40 constituting a ceiling of the engine room 7, and an engine room. It is composed of side partition plates 41a and 41b and piping room side partition plates 42a and 42b which form the ceiling of the piping room 10. The engine room side partition plates 41a and 41b and the pipe room side partition plates 42a and 42b are detachable upward.
At the time of removal, the front and rear side plates 37a and 37b are also removed, the engine room 7 is opened at the ceiling side, the front side and both corners, and the piping room 10 is opened at the ceiling side, the rear side and both corners. The part is opened, and the maintenance work of the equipment in each room is easy to do.

Also, at the boundary between the central partition plate 40 and the pipe chamber side partition plates 42a and 42b, and outside the upper portion of the rear middle plate 44a constituting the rear wall of the engine room 7 (upper portion on the side of the pipe chamber 10).
A gutter 48 (drain passage) is disposed in such a manner that it can be disassembled from the center and the pipe chamber side partition plates 40, 42a and 42b, that is, can be replaced with a new one. The gutter 48 is a groove extending in the longitudinal direction of the outdoor air-conditioning unit 2 (horizontal direction in FIG. 2), that is, in the direction of the surface where the heat exchanger is disposed, and becomes lower toward the right side (right side in FIGS. 2 and 5). It is inclined.
The high end 48b located at the highest point of the gutter 48 can be exposed to the outside by removing the right side plate 37d or by providing an opening (cleaning hole). The central partition plate 40 may cover the gutter 48 in a V-shape, and a plurality of rainwater dripping holes may be provided on the V-shaped bottom above the gutter 48.

A tubular vertical gutter (drainage pipe) 43 is connected to the lower end 48a located at the lowest part of the horizontal gutter 48 so as to be disassembled. The downspout 43 extends downward at a corner formed by the inner surface of the left side plate 37c and the outer surface of the rear middle plate 44a of the engine room 10, and has a drain port 43a opened at the lower end thereof.
Is located below the floor plate 33 and faces outward. The downspout 43 can be replaced with a new one by removing the left side plate 37c.

The engine room side partition plates 41a, 41b,
Piping chamber side partition plates 42a, 42b, and center partition plate 40
Are inclined so as to become lower toward the above-mentioned gutter 48 side.
Therefore, rainwater or the like that has entered the outdoor heat exchange chamber 14 is immediately collected by the horizontal gutter 48 and discharged to the outside through the vertical gutter 43. Also, due to the above inclination, the engine room side partition plates 41a, 4a.
1b, and the positions of the outer end portions of the pipe chamber side partition plates 42a, 42b are higher, and the openings for removing the front and rear side plates 37a, 37b to inspect and maintain the inside are larger.

The center partition plate 40 has two vent holes 40b for ventilating air so as to open into the outdoor heat exchange chamber 14. The outlet 40b is surrounded by a silence box 40c. Also this silence box 4
The opening 40d of 0c is located above the above-mentioned gutter 48, and is located downstream of the gutter 48 with respect to the discharge port 40b. This prevents rainwater or the like entering the outdoor heat exchange chamber 14 or rainwater or the like flowing in the horizontal gutter 48 from entering the engine room 7 from the discharge port 40b. In addition, a sponge-like sound absorbing sheet is stuck on the inside of the sound deadening box 40c.

The side wall of the engine room 7 is connected to the front side plate 37a,
The left wall 37c, the rear middle plate 44a, and the right middle plate 44b, the top wall is composed of the engine room side partition plates 41a, 41b, and the center partition plate 40, and the bottom wall is between the floor plate 33 and the floor plate 33. It is composed of bottom plates 45 arranged at intervals. The upper and lower end surfaces of the rear middle plate 44a and the right middle plate 44b are air-tightly connected to the partition plate 39 and the floor plate 33, and thus the engine room 7 is configured to have a soundproof structure.

The space between the bottom plate 45 and the floor plate 33 is a box-shaped air introduction chamber 46, and the bottom plate 45
Is a spout 45a for blowing ventilation air into the engine room 7.
Are arranged substantially uniformly over the entire surface. The piping chamber 10 is located on the right middle plate 44b side of the air introduction chamber 46.
There are formed two engine room air intakes 46a that open inside, and a ventilation fan 47 is disposed in each of the air intakes 46a. Here, the drain port 43a of the downspout 43 is provided on the opposite side of the engine room air inlet 46a, that is, at a position separated from the air inlet 46a by charging and separating.

On the inner surface side of the rear side plate 37b in the piping chamber 10, there are provided an electrical box 50 in which various control devices and the like are accommodated and arranged, and a terminal room 22 for connection to external piping. An air inlet 50a is formed on the bottom surface of the electrical component box 50, and a discharge port 50b is formed on the upper side surface. A gap serving as an air passage is opened between the bottom surface and the floor plate 33. The floor plate 33 is formed with a piping chamber air intake 33b for introducing outside air into the piping chamber 10, and outside air is introduced into the piping chamber 10 through the air intake 33b. A part of the introduced outside air is introduced into the electrical equipment box 50 from the air inlet 50a and is discharged from the outlet 50b, and the inside of the box 50 is ventilated. In addition, the drainage port 43a of the downspout 43 is located at a position distant from the piping chamber air inlet 33b and below the air inlet 33b.

The floor plate 33 is located below the terminal chamber 22.
There is no ceiling and there is no ceiling. The terminal room 22 is a communication passage connecting the piping room 10 and the outside of the casing 31. The terminal chamber 22 is opened to the rear outside with the rear side plate 37b removed. Each joint 100a of the refrigerant pipes 100, 1001,
The joint of 101a and the gas pipeline 22d is located in the terminal room 22, and is connected to an external pipe introduced from below the terminal room 22 respectively. Power cord 6 connected to external power supply
00 and the like are extended from below the terminal chamber 22 to the outside. Since the external piping is routed toward the lower side of the terminal chamber 22, the outer dimensions of the casing 31 become compact, and the piping chamber 22 also serves as the piping chamber air intake.

The refrigerant outdoor upper heat exchangers 11 and 11 are disposed at the upper front and rear sides of the outdoor heat exchange chamber 14, the refrigerant outdoor lower heat exchanger 12 is disposed at the rear lower portion, and the front lower lower heat exchanger 12 is disposed. The heat exchangers 13 for engine cooling water are respectively disposed in the engine. Here, the upper heat exchangers 11, 11 are arranged vertically and along the wire meshes 38a, 38b, whereas the lower outdoor heat exchanger 12 and the cooling water heat exchanger 13 The cooling water heat exchanger 13 is provided with the above-mentioned water inlet 30b at the right end of the upper end of the heat exchanger 13 for cooling water.

Here, the above-mentioned water inlet 30b is shown in FIGS.
9. As shown in FIG. 23, a water supply cylinder 60 connected via a rubber hose 13c to an upper end of a head pipe of the cooling water heat exchanger 13 disposed obliquely upward, and the water supply cylinder 6
The cap 61 includes a cap 61 for opening and closing the opening 60 a, and a pressure valve 62 disposed in the cap 61. In front of the opening 60a, an opening provided on the right end of the horizontal frame 36a and the column 34 constituting the side wall of the casing 31 of the outdoor air-conditioning unit 2 and a lid member 63 capable of opening and closing the opening are arranged. . The pressure valve 62 opens and closes a valve seat opening 60b formed in an intermediate portion of the water supply cylinder 60 with its valve body 62b. The valve body 62b is urged in a closing direction by a spring 62a. ing.

The pressure valve 62 regulates the maximum internal pressure of both circulation circuits of the cooling water. That is, when the internal pressure of the circulation circuit exceeds the valve opening pressure, the pressure valve 62 opens to guide the remaining air, steam or hot water to the cooling water reservoir tank 30a, thereby protecting the circulation circuit components even if an abnormal steam pressure is generated. It is possible.

The pressure valve 62 opens when the pressure difference between the outside and the inside of the circulation circuit becomes a predetermined value or more, and allows a flow from the outside to the inside . Stop the engine and decreases the cooling water temperature, the internal pressure steam content condenses in the circulation circuit is the differential pressure between the edge outward below atmospheric pressure inside Prefecture increases plexes
The shutoff valve 62 is opened, and the water in the cooling water reservoir tank is pushed up by the atmospheric pressure, and is refilled into the circulation circuit.

When the cap 61 is removed for checking the cooling water, the airtightness of the seal 61a is lost and the pipe 30c
The water inside returns to the reservoir tank 30a, and the water level drops. The water level gradually rises due to the repetition of the evaporation of water in the circuit due to the operation of the engine, the movement of water vapor through the pressure valve 62 to the reservoir tank 30a, and the increase in the water level corresponding to the amount of water vapor moved by stopping the engine. Then, replenishment can be performed in the circulation circuit, but in the meantime, the amount of cooling water may be insufficient. However, in this embodiment, since the water inlet 30b is arranged at the end of the engine cooling water heat exchanger 13 arranged at a low place, the position of the water supply pipe 60 is at a low place, and the water level rises faster and the cooling water amount is increased accordingly. It is hard to be short. The heat exchange in the accumulator 8 or the heat exchanger 13 for cooling water can be sufficiently performed accordingly. This is because, even if the generated steam pressure is lowered by heat exchange, the time required for replenishment becomes shorter.

The lower end of the cooling water heat exchanger 13 is located above the engine room side partition plates 41a and 41b and on the upper corner portion of the center partition plate 40 and the sound deadening box 40c.
The lower end of the refrigerant outdoor lower heat exchanger 12 is located on the lower corner portion of the central partition plate 40 and the sound deadening box 40c, further from the piping room side partition plates 42a, 42b and beyond the horizontal gutter 48.

Here, the pipes 29c, 29d, 16b, 16c, and 30c connecting the heat exchangers 13 for cooling water, the heat exchangers 11 and 12 for refrigerant, and each device in the piping chamber 10 are connected.
Are bundled on the right side plate 37d side of the piping chamber 10 and at the center in the front-rear direction. This tube bundle P passes through one sealing pad 49 provided at the right end of the center partition plate 40. Thus, a plurality of tube bundles P are sealed by one pad. The sealing pad 49 has cuts 49a connecting the pipe holes to the left side plate 37c direction end. Thus, after the piping is completed, the sealing pad 49 can be fitted into the piping from the right side with the right side plate 37d removed. The periphery of the sealing pad 49 forms a sealed state with the center partition plate 40 and the right side plate 37d, thereby dividing the piping chamber 10 and the heat exchange chamber 14. The pipelines connected to the heat exchangers 11 to 13 are obliquely routed along the oblique arrangement of the lower heat exchangers 12 and 13.

The engine 5 of this embodiment is a water-cooled in-line four-cylinder OHV engine.
g is directed in parallel with the front side plate 37a of the engine room, and the cylinder axis is inclined forward so as to be closer to the front side plate 37a toward the upper side, and the cylinder axis is inclined in the forward inclined state. Is fixed on the floor plate 45 via an engine mount 81.

As shown in FIGS. 7 to 9, the engine 5 according to this embodiment has an oil pan 5 on the lower mating surface of the cylinder block 5a.
b is fixed by bolting, the cylinder head 5c is fastened to the upper mating surface with a head bolt, and the cylinder head 5c is covered with a head cover 5d. The piston 5e slidably inserted into the cylinder bore of the cylinder block 5a is connected to the crankshaft 5g by a connecting rod 5f, and the cylinder head 5c is provided with a valve train 5h. The valve train 5h includes an intake valve 5
i, the exhaust valve 5i 'is configured to be opened and closed via a rocker arm 5j and a push rod 5k by a camshaft 51 disposed near the crankshaft 5g.

In the engine 5 of this embodiment, the cylinder block 5a is formed by integrating four cylinders.
In contrast to the block structure, the cylinder head 5c has a structure in which two cylinder bores are divided into one, that is, two sets, and two head covers 5d are provided correspondingly. A breather chamber 5m is formed in each of the head covers 5d.

Next, an intake system, an exhaust system, a lubrication system, and a cooling system in the engine 5 of this embodiment will be described. Each intake port 5p of the engine 5 is led out above the inclined axis X, and the intake manifold 73 'connected to each intake port 5p is connected to the right side plate 37d in the direction of the crankshaft 5g.
A gas mixer 21b is connected to an end of the gas cleaner 21b. The gas mixer 21b is connected to the air cleaner 21c disposed above the compressor 6 in the engine room 10 by an intake hose 21b.
a '.

The air cleaner 21c is shown in FIGS.
As shown in (5), the intake silencer portion 77 and the air cleaner portion 78 are combined, and the central portion is formed integrally. The intake pipe 21a is connected to an air inlet 77a of the intake silencer unit 77, and the intake hose 21a 'is connected to an air outlet 77b. The air cleaner section 7
Reference numeral 8 denotes a structure in which an element 78b is inserted and arranged in a casing 78a. The upstream side of the silencer portion 77 communicates with the inside of the element 78b, and the downstream side communicates with the outside.

The casing 78a is provided with an opening 78c for taking in and out the element.
Has a lid 78d detachably attached thereto. The air cleaner 21c is disposed so that the lid 78d faces the front plate 37a. Thus, by removing the front side plate 37a, it is possible to easily perform inspection and maintenance such as cleaning and replacement of the element of the air cleaner 21c.

The fresh air introduced from the air inlet 77a enters the expansion chamber 77d, and flows through the communication hole 77e between the intake silencer portion 77 and the air cleaner portion 78 to guide the blade 78e.
As a result, it is bent in a direction along the outer periphery of the element 78 b and guided to the air cleaner portion 78. Fresh air that has passed through the element 78b returns to the air cleaner section 78 and reaches the air outlet 77b via the expansion chamber 77f. The expansion chambers 77d and 77 here
The sound is muted at f, and the wide surface of the element 78b can contribute to dust removal by the guide blade.

The air inlet 77a of the air cleaner 21c
And the intake pipe 21a are connected by a structure shown in FIG. FIG. 13 shows both the intake system connection structure and the exhaust system connection structure in a single diagram. The numbers without parentheses indicate the intake system connection structure, and those with parentheses indicate the exhaust system connection structure. Each is for showing.
An opening 40e having a diameter larger than that of the air inlet 77a is formed in the central partition plate 40 which constitutes the dividing wall between the engine room 7 and the outdoor heat exchange chamber 14.
Is formed, and a sealing member 77d made of an elastic body fitted and mounted on the air inlet 77a is fitted and inserted into the opening 40e.
At this time, the seal member 77d is formed by the air cleaner 21c.
The air cleaner 21c is fixed to a bracket (not shown) provided on the center partition plate 40 by bolting or the like so that the air cleaner 21c is pressed against the lower surface of the center partition plate 40. Then, the lower end of the intake pipe 21a is fitted and mounted on the upper protruding portion of the air inlet 77a, and is fixed with a fixing band 77e.

The four exhaust ports 5q of the engine 5 are led out below the inclined axis X, and the exhaust gas heat exchanger 23b is directly connected to the external connection ports of these exhaust ports 5q, that is, through an exhaust pipe. Connected without letting.
As shown in FIGS. 7 and 30, the heat exchanger 23b has a structure in which an inner fin type heat exchange portion 73 located on the upper side and a screw type heat exchange portion 74 located on the lower side are integrated. It is set longer than the interval between the exhaust ports 5q, 5q at both ends.

The inner fin type heat exchange section 73 is formed by utilizing an exhaust passage, and is formed by bending an upper section and a lower section so as to form a substantially U-shape in order to secure a necessary heat exchange area. It has a structure in which it is molded, its outer surface is surrounded by a cooling jacket 73a, and a number of fins 73b protrude from its inner surface. The exhaust ports 5q communicate with the upper stage, and the cooling jacket 73
The water pipe 29e 'is connected to the cooling water outlet 73c of a.

The screw type heat exchange section 74 is
A cooling jacket (casing) 74a is formed in a cylindrical shape, and a number of helical screw pipes 74b are disposed in the jacket 74a. The exhaust end of the pipe 74b passes through the inner fin heat exchange section 73 at the upstream end. Is introduced into the upstream chamber 74c, and the downstream end is opened to the downstream chamber 74d. The downstream end of the screw pipe 74b is slidable with respect to the downstream chamber 74d side end of the cooling jacket 74a so as to absorb the thermal expansion.

A cooling water inlet 7 for introducing cooling water into the jacket 74a is provided below the cooling jacket 74a.
4e is formed, and the water pipe 29e is connected to the cooling water inlet 74e. In FIG. 30, the flow direction of the exhaust gas is indicated by a broken-line arrow, and the flow direction of the cooling water is indicated by a solid-line arrow.

The exhaust gas outlet 74g of the screw type heat exchange section 74 is connected to an exhaust silencer 23c via an exhaust pipe 23a '. A drain water outlet 74h guides condensed water generated by cooling water vapor contained in the exhaust gas to the neutralizer 82. And the exhaust silencer 23
c is disposed above the compressor 6 in the engine room 7 and adjacent to the air cleaner 21c. The exhaust silencer 23c has a structure in which an oil separator 76 is integrally formed with a silencer 75 as shown in FIGS.

The silencer section 75 is of a two-part type, and has a structure in which the interior is defined by a large number of expansion chambers 75a and the respective expansion chambers 75a are connected to each other by a reduction tube 75b. The exhaust gas inlet 75c of the silencer unit 75
Is connected to the exhaust pipe 23a ', and the exhaust pipe 23a is connected to the exhaust gas outlet 75d.

The exhaust pipe (23a) and the exhaust gas outlet (7
The connection structure with 5d) is configured in the same manner as the air inlet 77a and the intake pipe 21a of the air cleaner 21c shown in FIG. That is, as shown by the parenthesized code in FIG. 13, the seal member (75e) fitted and mounted on the exhaust gas outlet (75d) is pressed against the lower surface of the center partition plate 40 by the exhaust silencer (75). Exit (7
5d) The exhaust pipe (23a) is provided at the protruding portion inside the outdoor heat exchange chamber 14.
Is fixed. Needless to say, the seal member needs to be made of a material having heat resistance corresponding to the exhaust gas temperature. Note that (40f) indicates an opening having a larger diameter than the exhaust gas outlet (75d), and (75f) indicates a fixed band.

The oil separator 76 is formed integrally with an independent chamber 76a below the silencer 75 and at the side of the front plate 37a.
It has a structure in which an element 76b is inserted and disposed therein. The illustrated upper side wall 76c and right side wall 76d of the chamber 76a are common to the bottom wall of the silencer section 76. An opening 76e for inserting and removing the element 76b is provided on the side of the front plate 37a of the chamber 76a.
Is formed. A lid 76f is detachably attached to the opening 76e, and the lid 76f is attached to the front side plate 37a.
When it is removed, it faces the outside of the casing 31.

A breather hose 69 is connected to a breather air inlet 76 g of the oil separator 76.
A breather air outlet 76h provided on the left side surface at the back of the oil separator portion is connected to a breather air inlet 77c of the silencer portion 77 of the air cleaner 21c by a hose 79. The breather hose 69 includes branch hoses 69a and 69b connected to the connection port 5n of the breather chamber 5m of each head cover 5d, and the oil separator portion 76.
Hose 69c that joins right above the breather chamber on the side closer to
And a connection hose 69e connected to the T-tube 69d and the breather section inlet 76g. The lubricating oil separated by the oil separator 76 is connected to the connection hose 69.
e, it flows down along each wall of the T-shaped pipe 69d and is collected into the oil pan 5b from an oil recovery hose 80 connected below the oil level in the oil pan of the oil pan 5b with the T-shaped pipe 69d. Further, the connection port of the hose 80 to the oil pan is located above the drain plug 5v ', thereby allowing the oil in the hose 80 to be drained by lifting the hose 80. Note that the bottom wall of the oil separator portion is gently inclined from the back toward the front toward the breather portion inlet 76g, thereby facilitating discharge of separated oil.

The compressor 6 on the floor plate 45 of the engine room 7
At a lower position, a neutralizer 82 for neutralizing condensed water containing acidic gas in the exhaust gas is disposed. The neutralizer 82 has a drain port 74 of the exhaust gas heat exchanger 23b.
h, the drain port 75c 'of the exhaust silencer 23c and the drain port 83a of the mist separator 83 are connected by drain hoses 84a, 84b, 84c, respectively.

The lubrication system of the engine 5 of this embodiment is shown in FIG.
2, the lubricating oil in the oil pan 5b is removed by the oil screen 6 by the oil pump 61 as shown in FIGS.
1b, sucked up, pumped through an oil filter 62 to a main gallery 63 arranged at the center of the camshaft, and distributed and supplied to various parts to be lubricated therefrom. Reference numeral 61a denotes a relief valve for maintaining the discharge pressure of the oil pump 61 at a predetermined value or less, and 62a a built-in relief filter for bypassing the lubricating oil when the passage pressure of the oil filter 62 exceeds a predetermined value. The valve 63 a is an oil passage connecting the main gallery 63 and the oil filter 62.

The lubrication system includes the main gallery 63
To the journal 64 of the camshaft 5l, the journal 65 of the crankshaft 5g, and the large end 66 of the connector 5f and return to the oil pan 5b, and from the main gallery 63 to the cylinder head 5c of the cylinder head 5c. A second lubrication system B for supplying oil to each valve train 5h and returning to the oil pan 5b;
Oil is supplied from the oil filter 62b to the bearing 67 and the gear 68 of the output take-out shaft (PTO shaft) disposed in the middle gear case m, and the lubricating oil dropped to the bottom of the gear case m is returned to the oil pan 5b. And a third lubrication system C.

In the lubrication system B, the number of oil passages 5t from the main gallery 63 to the tappet chamber in which the tappets 5j are arranged is equal to the number of cylinder heads 5c. Only the minimum quantity required. These two oil passages 5
At least one of t is provided with a throttle 5u, which regulates the flow rates of the left and right oil passages. In the lubrication system B, the lubricating oil lubricating the valve train 5h returns to the oil pan 5b through the arrangement hole 5s of the push rod 5k. Since the arrangement hole 5s is provided on the lower side, the lubricating oil is smoothly returned.

As described above, each of the head covers 5
The breather chamber 5m formed in the oil separator section 76 through the breather passage 69 from the breather outlet 5n.
The lubricating oil separated by the oil separator 76 is returned to the oil pan 5b via an oil return hose 80. The oil return hose 80 extends downward along the right middle plate 44b of the engine room 7, extends to the center of the engine room along the bottom plate 45, and is connected to the oil pan 5b near a mounting portion of an oil filter 62 described later. . This avoids an increase in the space in which the oil return hose 80 is arranged in the engine room 7 and obstructions such as engine inspection and maintenance. The oil separator 76
The air (breather air) from which the lubricating oil is separated by
The air cleaner 2 disposed adjacent to the separator section 76
1c is supplied by a breather hose 79, and both are arranged adjacent to each other, so that the breather hose 79 can be shortened.

Further, the oil pan 5b is provided separately from the engine 5 via oil hoses 24c and 24d.
The oil tank 24a, which is arranged at a position higher than the oil level of the oil pan 5b, is connected thereto, and a solenoid valve 24b is provided in the middle of the oil hose. When the solenoid valve 24b is opened, lubricating oil is supplied into the oil pan 5b by its own weight.

The oil tank 24a has a replenishing port 24e between the right middle plate 44b of the engine room 7 and the right plate 37d of the case sink 31, that is, in the piping room 10 lower than the engine room 7.
Are arranged so as to face the front side plate 37a side. A cap provided with a breather passage with a check valve for guiding the atmosphere with consumption of oil is detachably attached to the supply port 24e. As shown in FIG. 3, the oil tank 24a has an L-shaped cutout formed in a lower portion thereof, and the reserve tank 30a is disposed in the cutout. Thus, the relatively large oil tank 24a and the reserve tank 30a are arranged in a small space without difficulty. Above the reserve tank 30a, there are provided a breather passage 30e for allowing air to enter and exit, and a supply port 30d for detachably attaching a cap. Also, by removing the front side plate 37a,
Since the supply ports 24e and 30d of both tanks 24a and 30a face outward, supply of lubricating oil, supply of cooling water, and the like are performed simultaneously.
And can be easily performed.

The solenoid valve 24b is fixed via a support bracket near the left engine mount 81 on the upper surface of the floor plate 45 and near the lubricating oil inlet 5r to the oil pan 5b. The solenoid valve 24b and the inlet 5r are connected by a flexible oil hose 24c, and the solenoid valve 24b and the oil tank 24a are also connected by a flexible oil hose 24d. The lubricating oil inlet 5r is located higher than the oil level in the oil pan, so that the dirty oil in the oil pan 5b
b is prevented from flowing backward.

Here, in the present embodiment, an oil supply amount control device for automatically supplying an amount of lubricating oil to the oil pan 5b according to the amount of lubricating oil consumed is provided. As shown in FIG. 32, the refueling amount control device includes an engine speed detection sensor 9
1a, an oil level detection sensor 91b for detecting a lubricating oil level in the oil pan 5b, and a load detection sensor 91c.
And a detection value from each of the sensors, and an EC for controlling the opening / closing timing of the solenoid valve 24b as a refueling means.
U92. The load detection sensor 91
Specifically, one or a plurality of sensors for detecting the throttle opening, the fuel supply amount, and the boost pressure are employed as c.

The ECU 92 determines the engine speed from the engine speed detection sensor 91a by using the load detection sensor 9a.
1c, an engine speed integrating means 92a for integrating while correcting according to the detected load, a memory 92b for storing the integrated total engine speed, and a reference integrated rotational speed for the integrated total engine speed. Solenoid valve 24 when
It functions as refueling control means 92c that opens b.

The oil pump 61 is disposed near the boundary between the oil pan 5b and the skirt portion of the cylinder block 5a and below the inclined axis X, as shown in FIGS. The oil filter 62 is provided on the outer surface of the skirt of the cylinder block 5a.
It is detachably attached to an oil filter bracket 5v attached to the lower part. Thus, the oil filter 62 is located below the exhaust gas heat exchanger 23b, and faces outward when the front side plate 37a is removed, and is removable from the outside. Further, since the oil filter bracket 5v is provided, even if the attaching / detaching portion of the oil filter 62 is damaged, only the oil filter bracket 5v needs to be replaced.

The oil filter 62 has a discharge port 61 a of the oil pump 61 and an engine-side inlet 63.
The lubricating oil that is located below the oil filter 62 and that has accumulated in the oil filter 62 does not escape even when the oil pump 61 is stopped for a long time. Therefore, at the time of re-operation after the engine has been stopped for a long period of time, the lubrication system rises faster by the amount of time required for lubricating oil to accumulate in the oil filter. Since the oil filter bracket 5v is interposed between the oil filter 62 and the engine, the height relationship between the pump discharge port 61a, the oil level and the like can be freely set, and the mounting direction of the oil filter 62 Has a high degree of freedom.

A specific arrangement structure of the cooling system of the engine of this embodiment will be described. In the cooling jacket circulation circuit, which is one of the low-temperature circulation circuits, the cooling water pump 28a and the water pipe line 29a are connected as shown by solid arrows in FIGS.
Cooling jacket 2 on the outer periphery of wet liner 500a
8b, through the cooling jacket 28b of the cylinder head,
Further, the water pipe 29a ', the switching valve 28c, the water pipe 29
s, 29t, and the cooling water circulates in the circuit of the cooling water pump 28a.

In this case, as shown in FIGS.
The cooling water pump 28a is arranged at the lowest position, the switching valve 28c is arranged at the highest position, and the components and parts to be cooled between the pump 28a and the switching valve 28c are located at higher positions on the downstream side. Are arranged as follows. The switching valve 28c and the water inlet 3 of the cooling water heat exchanger 13
0b is connected by the above-mentioned bypass hose A. Therefore, the air in the cooling water in the low-temperature circulation circuit is supplied during both the operation of the pump 28a and the stop of the operation of the pump 28a.
The water gathers at the switching valve 28c, passes through the bypass hose A, rises to the water inlet 30b, and accumulates there.

In the exhaust gas heat exchanger circulation circuit, which is one of the low-temperature circulation circuits, a cooling water pump 28e, a water pipe line 29e, an exhaust gas heat exchanger 23b, a water pipe 29e ', a bypass pipe 29r for bypassing the switching valve 28c, a water pipe 29
b, three-way valve 28d, water line 29c, heat exchanger 1 for cooling water
3. Cooling water circulates in the circuits of the water pipes 29d and 29p and the cooling water pump 28e. At a high temperature, the cooling water pump 28e and the cooling water pump 28a are connected in series, so that the water also circulates in the high temperature circulation circuit. That is, the cooling water pump 28e, the water pipe 29e, the exhaust gas heat exchanger 23b, the water pipe 29e ', the water pipe 29t, the cooling water pump 28a, the water pipe 29a, and the cooling jacket 28.
b, water pipe 29a ', switching valve 28c, water pipe 29
b, a three-way valve 28d, which branches off from the cooling water heat exchanger 13 or the heat exchange part 29g of the accumulator 8 and returns to the cooling water pump 28e via the water pipe 29p.

In the exhaust gas heat exchanger circuit at a low temperature, the cooling water pump 28e is disposed at the lowest position, and the cooling water heat exchanger 13 is disposed at the highest position. The components to be cooled and the portion to be cooled are arranged so as to be located at a higher position on the downstream side. Therefore, the air in the cooling water rises into the heat exchanger 13 during the operation of the pump and during the stoppage of the pump, and the air is supplied to the water inlet 30 of the heat exchanger 13.
b.

The heat exchange section 29 of the accumulator 8
When the three-way valve 28d is set to an intermediate opening, the water pipes 29b, 29c, and 29f communicate with each other in the three-way valve 28d. The water flows backward in the path 29f and accumulates in the water inlet 30b from the cooling water heat exchanger 13. That is, by setting the three-way valve 28d to the halfway opening while the pump is stopped, the air is more reliably vented. Further, a part of the water pipe 29b is located lower as the distance from the switching valve 28c increases. The air is removed from this portion by the air rising to the switching valve 28c during the stoppage of the pump, and from there passing through the bypass hose A and accumulating in the water inlet 30b.

Further, the return water system from the heat exchange section 29g of the accumulator 8 is connected to the water pipe 29f 'as the first return path in the middle of the water pipe 29d as the second return path from the water inlet 30b. It is constituted by doing. In this case, the water pipe 29f 'extends obliquely upward such that the junction is located at a high place. Therefore,
When the pump is stopped, the air in the return water system rises through the water pipes 29f 'and 29d and rises in the water inlet 30b.
Will accumulate in

Next, the operation and effect of this embodiment will be described. During the cooling operation, the four-way valve 15 is switched to the outdoor heat exchanger side shown in FIG. The high-temperature, high-pressure refrigerant gas compressed by the compressors 6, 6 is supplied to the refrigerant outdoor heat exchangers 11, 12 through the refrigerant line 16a, the four-way valve 15, and the refrigerant line 16b. Is cooled by outside air and liquefied. The liquefied high-pressure refrigerant liquid passes through the main accumulator 8 through the refrigerant line 16c, and is decompressed by the expansion valve 18 in the refrigerant line 17a. The decompressed low-pressure refrigerant liquid evaporates by removing heat from the indoor air in the indoor heat exchanger 4, and the evaporated heat causes a cooling effect to cool the room. The evaporated refrigerant gas is supplied to the refrigerant line 17.
b, passes through the four-way valve 15, the refrigerant pipe 16d, the main accumulator 8, the sub-accumulator 9, and returns to the compressor 6, and the same cycle is repeated.

During the heating operation, the four-way valve 15 is switched to the indoor heat exchanger side, and the high-temperature, high-pressure refrigerant gas from the compressors 6, 6 is transmitted to the indoor heat exchanger 4 via the refrigerant pipes 16a, 17b. The air is supplied and cooled by the room air to be liquefied. In this case, the heat of condensation heats the room air to obtain a heating effect. The liquefied refrigerant liquid is decompressed by the expansion valve 18. The decompressed low-pressure refrigerant liquid evaporates by removing the heat of the outside air in the outdoor heat exchangers 11 and 12, returns to the compressor 6 via the main accumulator 8 and the sub-accumulator 9, and the same cycle is repeated. .

The heat exchange in the outdoor heat exchange chamber 14 is performed as follows. The outdoor heat exchange blower fan 44
, The outside air is sucked into the outdoor heat exchange chamber 14 from the wire meshes 38a and 38b and discharged upward from the ceiling opening 37f. In this case, as shown in FIG. 2, air flows in a substantially horizontal direction in the upper part of the outdoor heat exchange chamber 14 because it is close to the blower fan 44. And upper heat exchanger 1
1 is arranged vertically, the air passing through the upper heat exchanger 11 flows in a direction substantially perpendicular to the upper heat exchanger 11 as shown by an arrow a.

On the other hand, in the lower part of the outdoor heat exchange chamber 14, air flows obliquely upward because it is far from the blower fan 44.
On the other hand, since the lower heat exchangers 12 and 13 are inclined so that the lower ends thereof are located inside, the air passing through the lower heat exchangers 12 and 13 has the lower heat exchange as indicated by the arrow b. It flows in a direction substantially perpendicular to the vessels 12,13.

As described above, in this embodiment, the upper heat exchanger 1
1 and the lower heat exchangers 12, 13
Is inclined, the air flow in any heat exchanger flows substantially perpendicular to the heat exchanger, whereby the air flow can be made substantially uniform over substantially the entire surface of each of the heat exchangers 11 to 13, Heat exchange efficiency can be improved. By the way, when the lower heat exchangers 12 and 13 are vertically arranged, the air passage of the heat exchanger becomes oblique with respect to the flow direction of the air, so that the resistance increases and the amount of air decreases.

Further, regarding the lower heat exchangers 12 and 13,
Since it is arranged to be inclined inward, in the case of the same heat exchange area, the heat exchanger arrangement surface of the outdoor heat exchange chamber 14 may be narrower than that in the vertical direction, and it is possible to suppress an increase in the size of the outdoor air conditioning unit 2, It is possible to avoid the problem of an increase in weight and an arrangement space.

In the operation of injecting the engine cooling water, the lid 63 is opened and the cap 61 of the water inlet 30b is removed. The opening 60a is formed from the rear surface of the air conditioning unit 2.
Water. In this case, since the water injection port 30b is provided at the upper end of the head pipe 13c of the cooling water heat exchanger 13 that is arranged on the lower side and inclined, the height position is provided on the top wall, for example. This is lower than the conventional example, and the cooling water can be easily injected. Opening 60a for water injection
Is opened diagonally upward, so that water injection is easy from this point as well.

When the cooling water is drained from the cooling water circuit to check the engine and the cooling system, and the cooling water is injected again, the air in the cooling system is vented as follows. First, in the low temperature circulation circuit, the switching valve 28c located downstream of the pump 28a is located at the highest point, and the switching valve 28c is connected to the water inlet 30a located at the highest point of the entire cooling system by the bypass hose A. Therefore, the air in the circuit accumulates in the water inlet 30d from the switching valve 28c during the operation of the pump and when the pump is stopped, and the air can be released by loosening the cap 61.

Further, in the exhaust gas heat exchanger circulation circuit, since the water pipes from the pump 28e to the heat exchanger 13 and the portion to be cooled are located at higher positions on the downstream side, the air flows into the water pipe 29.
e, exhaust gas heat exchanger 23b, water line 29e ', 29
r, 29b, the three-way valve 28d, and the water pipe 29c, accumulate in the water inlet 30b of the heat exchanger 13, and can be extracted outside.

When the three-way valve 28d is set to an intermediate opening, the water pipes 29b, 29c, and 29f communicate with each other when the three-way valve 28d is set to the halfway opening position. The air flows back through the water pipe 29f, and the heat exchanger 1 for cooling water
3 accumulates in the water inlet 30b. In addition, since a part of the water pipe 29b is located at a lower position as the distance from the switching valve 28c increases, the air bleeding of this part rises to the switching valve 28c while the pump is stopped, and passes through the bypass hose A from there. This is done by collecting in the water port 30b.
In the drainage system from the heat exchange section 29g, the water pipes 29f ', 2
It also collects in the water inlet 30b through 9d and can therefore be drained out.

In this embodiment, the lower heat exchangers 12, 1
3, the lower end portion is arranged on the center partition plate 40, so that the pipe room side partition plates 42a, 42b and the engine room side partition plate 41 can be moved without moving the lower heat exchangers 12, 13.
A and 41b can be attached and detached, and particularly when the front and rear side plates 37a and 37b are removed from the front and rear, the work for inspecting the engine and each pipe from above is easy. Especially the front and rear side plates 37
When two pieces a and 37b are removed together with the partition plate, the engine can be inspected from above, forward, and oblique directions, and each pipe and the like can be inspected from above, rear, and oblique directions. .

Here, when the refrigerant outdoor heat exchanger is used as an evaporator (at the time of heating), water vapor in the atmosphere condenses on the surface of the heat exchanger, but as described above, the lower heat exchangers 12 and 13 are used.
The condensed water flows mostly along the inclined surface of the heat exchanger 12, and the condensed water flows into the gutter 48 or the gutter 48. Fall to a position close to. Therefore, the corrosion of the partition plates 41a and 41b and the piping room partition plates 42a and 42b can be suppressed to a lesser extent because condensed water is less likely to adhere to the partition plates.

Furthermore, in the inclined arrangement of the heat exchangers 12 and 13, the ventilation outlet 40b of the engine room 7 is located between the lower ends of the heat exchangers 12 and 13.
High-temperature air in the engine room 7 does not pass through the heat exchanger, so that adverse effects on heat exchange efficiency can be avoided.

Drainage such as rainwater is performed as follows. When rainwater or the like that has entered the outdoor heat exchange chamber 14 from the wire meshes 38a and 38b falls on the partition plate 39, it flows into the horizontal gutter 48 from the partition plate 39, passes through the vertical gutter 43, and enters the outside through the drain port 43a. The water is drained below the floor plate 36 of the air conditioning unit 2.

In this case, since the center, engine room side, and piping room side partitioning plates constituting the partitioning plate 39 are inclined so that the side gutter 48 side is lowered, the rainwater or the like can be quickly introduced into the side gutter 48. Can flow in. In this way, since rainwater and the like are drained in a short time without staying on the partition plate 39 constituting the floor member of the outdoor heat exchange chamber 14, the corrosion resistance of these floor members can be improved.

Further, since the partition plate 39 constituting the ceiling of the engine room 7 and the piping room 10 is arranged in an inclined manner, the two chambers 7,
The outside height of the front plate 10 can be increased, so that the opening when the front side plate 37a and the rear side plate 37b are removed can be enlarged, and the maintainability can be improved.

Further, since the horizontal gutter 48 and the vertical gutter 43 are arranged outside the engine room 10 and drained below the engine room, even if holes are formed in these gutters, rainwater or the like enters the engine room. I will not do it. Therefore, rainwater or the like does not splash on a high-temperature engine or the like, and the heat shock resistance and corrosion resistance of the engine or the like can be improved. Drainage port 4 of downspout 43
Since 3a is located on the opposite side of the air inlet 36a of the engine room 7, rainwater or the like does not enter the engine room 7 and the failure of the engine due to water droplets being sucked into the engine can be prevented. The position of the drainage port 43a is lower than the piping room air inlet 33b, and since it is separated, rainwater does not enter the piping room 10. The air inlet 36a of the engine room 7 is separated from the air inlet 33b of the pipe room, and the air inlet 36a of the engine room 7 is connected to a drain 43a.
Would be further away from

If the horizontal gutter 48 and the vertical gutter 43 are made of synthetic resin, the corrosion resistance can be improved by that much, and the floor gutter 43 and the vertical gutter 43 can be replaced with other floor members, so that the overall durability can be improved. . This vertical gutter 43 can be replaced by removing the right side plate 37d, and the work is easy. Furthermore, since the left end portion 48b located on the upstream side of the gutter 48 can be exposed to the outside, cleaning from the outside is possible. Cleaning can be performed more efficiently by removing the right side plate 37c.

The ventilation of the piping room 10 and the engine room 7 is performed as follows. When the outside air is rotated by the ventilation fan 47, the piping room air inlet 33 b of the floor plate 33 and the terminal room 22
From the piping chamber 10. At this time, a part of the introduced air ventilates the electrical equipment box 50, so that the electrical equipment can be cooled. The air introduced into the piping chamber 10 is pushed by the ventilation fan 47 into an air introduction chamber 46 formed between the bottom plate 45 and the floor plate 33 of the engine room 7, and is injected from the ejection port 45 a into the engine room 7. Squirt all over. At this time, the cooling water pump 28e disposed before the ventilation fan 47 is cooled. Further, the ejection port 45a is opened below the oil pan 5b and the oil filter 62. The engine mount 81 includes an oil pan 5b, an oil filter 62, and a rubber portion.
To cool effectively. The end of the air introduction chamber 46 opens to the engine room 7, where a cooling water pump 28a is disposed.
Cooled. In particular, both cooling water pumps 28a and 28e are electric pumps and generate heat, and cooling by a ventilation flow is effective in securing the durability of the bearing portion and the seal portion. The blasted air is exhausted into the outdoor heat exchange chamber 14 from the exhaust port 40b formed in the ceiling wall through the sound deadening box 40c while ventilating the engine room 7. In this case, since the air introduction chamber 46 is formed in a box shape extending over the entire bottom surface of the engine room 7 and a large number of ejection ports 45a are formed in the bottom plate 45, ventilation air can be introduced into substantially the entire area of the engine room 7 and ventilation. Can be performed reliably.

The ventilation air inlet 4 to the engine room 7
Since the opening 6a is opened in the piping chamber 10, the noise in the engine room 7 leaks into the piping chamber 10 but does not leak directly to the outside. In addition, since the piping chamber 10 has a large volume, the noise attenuating function is reduced. As a result, noise can be reduced. Further, an ejection port 45a formed in the bottom plate 45 of the engine room 7
Is opened in the box-shaped air introduction chamber 46, so that the air introduction chamber 46 also provides a damping function,
From this point, noise can be reduced. Also, rainwater splashes enter the piping chamber 10 from the air inlet 36a to the piping chamber 10, but do not enter the engine room 7.

Here, liquid refrigerant is stored in the main and sub accumulators 8 and 9 provided in the piping chamber 10, and a cooling function by the refrigerant is obtained. In this embodiment, the accumulators are arranged between the air inlet 33b to the pipe chamber 10 and the air inlet 46a to the engine chamber 7, so that the outside air is cooled in the pipe chamber 10 and then cooled. It will be introduced into the chamber 7. Therefore, since the inside of the engine room 7 is ventilated by air having a relatively low temperature, the engine room 7 is cooled more reliably. As for the refrigerant, energy is given by the heat of the air in the piping chamber 10, and the thermal efficiency is improved.

In the above ventilation, the air outlet 45a to the engine room 7 and the discharge port 40b from the engine room 7 are provided at a distance from each other, and the engine 5 is disposed between them. Air having a relatively low temperature will surely hit the engine 5, and in this respect, the cooling performance of the engine 5 is improved.

The exhaust port 40b for discharging air from the engine room 7 is surrounded by a muffling box 40c.
The opening 40d of 0c is provided at a position distant from each pipe passing through the pad 49 portion of the partition plate 39 and is arranged so as to flow out in the opposite direction, so that the exhaust air from the engine room heats each pipe. This is advantageous for the corrosion resistance of the pipeline, and does not adversely affect the heat exchange action of the heat exchanger.

Further, since the muffling box 40c and the discharge port 40b are located higher than the gutter 48, water flowing through the gutter 48 can be prevented from entering the engine room 7 through the opening 40d of the muffling box 40c. .

Further, in this embodiment, the front side plate 37a constituting the engine room 7 is made detachable, and the front side plate 3a of the engine 5 is removed.
Since the oil filter 62 is disposed at a position facing the portion 7a, the work of attaching and detaching the oil filter 62 is easy. In particular, when the engine room 7 and the piping room 10 are arranged so as to overlap one another in order to suppress the width of the outdoor unit as in this embodiment, it is extremely difficult to attach and detach the oil filter from the piping room 10 side. In addition, the arrangement structure of the present embodiment has a large effect when the engine room 7 and the piping room 10 are arranged in such a manner that they overlap each other.

An exhaust gas heat exchanger 23b is disposed below the tilt axis X of the engine 5, and an oil filter 6
2, the lubricating oil does not touch the high-temperature exhaust passage even if the lubricating oil leaks due to the attachment / detachment of the oil filter or the deterioration of the gasket.

When lubricating oil is supplied to the oil pan 5b from a separate oil tank, since the solenoid valve 24b is disposed at a lower position than the connection port 5r to the oil pan 5b, after the solenoid valve 24b is closed, Lubricating oil downstream of the solenoid valve 24b can be prevented from flowing into the oil pan 5b, and responsiveness associated with opening and closing the solenoid valve can be improved accordingly.

Further, since the solenoid valve 24b is fixed on the floor plate 45 in order to arrange it at a low place, the oil hose 24d can be routed along the floor plate 45, thereby checking especially the element replacement of the oil filter 62 and the like. During maintenance, the oil hose 24d does not become an obstacle during the attachment / detachment work of the exhaust gas heat exchanger 23b, and the workability can be secured.

Since the solenoid valve 24b and the connection port 5r of the oil pan 5b are connected by the flexible oil hose 24c, it is possible to prevent engine vibration from being directly transmitted to the solenoid valve 24b. And in this case, the solenoid valve 24b
Since the oil hose 24c is relatively short by disposing the oil hose 24c near the connection port 5r, the vibration of the flexible oil hose 24c due to engine vibration can be reduced, and the life of the hose 24c can be secured.

The control of the supply amount of the lubricating oil to the oil pan 5b is performed as shown in FIG. When the engine is started, the detected engine speed is corrected to a lower speed for a smaller load according to the detected load, and corrected to a higher speed for a larger load, and the engine is stopped. (Steps S1 to S3). When the engine stops, if the oil level is not lower than the lower limit and not higher than the upper limit, it is determined whether the cumulative value of the engine speed exceeds a preset reference cumulative number (steps S3 to S6). In this case, the solenoid valve 24b is opened, and when the oil level reaches the upper limit, the solenoid valve 24b is closed, each data is reset, and the operation is terminated (steps S7 to S10).

When the solenoid valve is opened, it is monitored whether or not a time longer than a specified time elapses before the oil level reaches the upper limit. It is determined that there is an abnormality in the oil level sensor, the solenoid valve 24b, the oil tank 24a, the hoses 24c and 24d in the middle, etc., and a warning is displayed indicating that maintenance is required (steps S11 and S12), and the process proceeds to step S9. . If the oil level is equal to or less than the lower limit in step S4, the flow proceeds to step S7 to supply the lubricating oil immediately. If the accumulated engine speed does not exceed the reference value in step S6, the accumulated engine speed is stored. Then, the operation is terminated, and the accumulated engine speed is further accumulated at the next engine operation.

Although the consumption of lubricating oil due to the rise of oil is considered to depend on the total engine speed, in this embodiment, the engine speed is accumulated and the lubricating oil is supplied when the engine speed reaches a reference value. As a result, the lubricating state can be stabilized for a long time, and the durability of the engine can be improved.

In this case, it is considered that as the engine load increases, the combustion pressure increases, the amount of the breather gas from the crank chamber increases, and the lubricating oil consumption increases. In this embodiment, the engine rotation speed increases as the engine load increases. Is corrected to a larger value to accumulate, so that an amount of lubricating oil that accurately corresponds to the actual amount of lubricating oil consumed in consideration of the amount of oil discharged from the crankcase to the atmosphere as oil mist can be supplied.

In accumulating the engine speed, the engine speed is corrected and accumulated according to the magnitude of the load. However, this is not always necessary, and the engine speed is accumulated without correction. Alternatively, the lubricating oil may be supplied when the cumulative value reaches the reference value.
Also in this case, it is possible to supply the lubricating oil according to the consumption of the lubricating oil.

In the engine 5 of this embodiment, since two sets of cylinder heads 5c are provided for four cylinders, that is, the cylinder heads are divided into a plurality of cylinder heads. Is simplified, and handling in machining or the like is easy.

The cylinder head is on the upper part, and the high-temperature breather gas easily enters. In this embodiment, since the breather chamber 5m is provided in the cylinder head 5c, the breather chamber 5m is far from the crank chamber, so that the oil separating property can be improved. Further, since the breather chambers are provided in both of the two cylinder heads 5c, 5c, the breather function can be maintained even if one of the cylinder heads 5c is clogged.

Since the breather chamber 5m is formed in each cylinder head 5c and connected to the external oil separator section 76, the load on the oil separator section 76 is increased by the amount corresponding to the engine side breather function. And the function of the oil separator 76 can be maintained for a long period of time. In connecting the respective breather chambers to the oil separator portion 76 with the breather hose 69, the two branch hoses are joined and the joining passage is connected to the oil separator 76 portion. Hose length can be shortened.

Since the oil separator section 76 is integrated with the exhaust silencer section 75 when forming the oil separator section 76, the number of parts can be reduced and the size can be reduced. Can be prevented, and deterioration of the separated lubricating oil due to generation of mayonnaise sludge can be prevented. In this case, the oil separator 7
Since the top wall 76c and the right wall 76d of the sixth unit are shared with the wall of the exhaust silencer unit 75, the exhaust heat utilization efficiency can be improved.

The cover 76f of the oil separator 76
Are disposed at positions facing outward when the front side plate 37a is removed, so that the inspection and maintenance of the oil separator 76 can be improved.

When the exhaust gas heat exchanger 23b is disposed, the front side plate 37a facing the heat exchanger 23b is detachable, so that inspection and maintenance of the heat exchanger 23b is easy. Further, since the heat exchanger 23b is composed of the inner fin type heat exchanger 73 and the screw type heat exchanger 74 integrated with the inner fin type heat exchanger 73, the entire exhaust gas heat exchanger 23b is secured while securing a necessary heat exchange area. Can be reduced in size.

Further, the inner fin type heat exchanger 73 is
The fins 73b are formed in the exhaust passage for guiding the exhaust gas to the screw heat exchanger 74, and are directly connected to the exhaust port 5q, so that the exhaust passage for guiding the exhaust gas to the screw heat exchanger 74 also exchanges heat. The heat exchange capacity with exhaust gas can be enhanced while effectively utilizing the space. In this case, the heat transfer area is increased by the fins 73b, and the flow becomes turbulent, thereby improving the heat exchange efficiency. By the way, for example, when the partition method is used, the flow path resistance becomes large, the flow is stagnant, and the heat exchange efficiency is low. Further, since the length of the spiral screw pipe 74b of the screw heat exchanger 74 is longer than the length between the exhaust ports 5q at both ends, a sufficient heat exchange area can be obtained.

An exhaust port 5q is disposed below the inclined axis X of the engine 5, and an exhaust gas heat exchanger 23b is disposed below the exhaust port 5q.
Is disposed, it is possible to reliably prevent the condensed water generated in the heat exchanger 23b from entering the engine. That is, although the water cooled by the accumulator 8 is introduced into the exhaust gas heat exchanger 23b, the temperature in the accumulator 8 is about 0 ° C., and accordingly, the exhaust gas heat exchanger 23b
Condensed water is easily generated in the inside. This condensed water may enter the engine due to exhaust pulsation. Therefore, in the present embodiment, since the exhaust gas heat exchanger 23b, in particular, the screw heat exchanger 74 is disposed below the exhaust port 58, the above-mentioned intrusion can be avoided.

Since the exhaust gas heat exchanger 23b is located lower than the cooling water heat exchanger 13, the cooling water heated by the exhaust gas heat exchanger 23b is cooled by natural convection during cooling operation. 13 flows smoothly.

Since the exhaust silencer 75 is disposed above the exhaust gas heat exchanger 23b and the neutralizer 82 is disposed below the heat exchanger 23, the exhaust silencer 75 and the exhaust gas heat The condensed water from the exchanger 23b can be reliably led to the neutralizer 82.

In arranging the intake pipe 21a and the exhaust pipe 23a, the air cleaner 21c, the exhaust silencer 23c
The air inlet 77a and the exhaust gas outlet 75d of the air cleaner 21c protrude into the outdoor heat exchange chamber 14, and the air cleaner 21c,
Since the exhaust silencer 23c presses the sealing members 77d and 75d against the central partition plate 40, the number of parts is reduced, and the number of assembling steps can be reduced accordingly.

In the above embodiment, at the time of water injection, FIG.
As shown in the figure, the opening and closing window 63 facing the water inlet 30b.
You can open it. As can be understood from the above description, the water inlet 30b is disposed at the front right end, and the front side plate 3
Both the water supply to the supply port 30d of the reserve tank 30a and the water supply to the supply port 30d with the 7a removed can be easily performed. Also, as mentioned above,
By removing the front side plate 37a, replacement of the oil filter 62, replacement of the element 78b of the air cleaner 21c,
Replacement of the element 76b of the oil separator portion 76, lubrication of the oil tank 24a, inspection of the spark plug 5w facing forward with the inclination of the engine 5, lubrication of the lubrication port 5x provided on the cylinder head cover 5d, and oil pan Inspection of waste oil, oil level gauge 5z, etc. due to the position of oil drain 5u of 5b being forward,
Almost all work required for maintenance of the engine 5 can be performed from the front, and the maintainability is good.

In the above embodiment, the case where the engine coolant heat exchanger 13 is disposed below the refrigerant heat exchanger 11 has been described. Can be applied to the case where the refrigerant heat exchanger 11 is disposed on the upper side, and in this case, a water inlet may be provided in the upper engine cooling water heat exchanger. In addition, although the water inlet 30b is attached to the heat exchanger 13 for engine cooling water, the water inlet may be attached independently of the heat exchanger 13 as a separate body. The degree of freedom in the location of the water inlet can be improved. In any case, the water inlet is opened obliquely upward toward the inner surface of the side wall of the air conditioning unit.

Although the intake pipe 21a is opened outside the ceiling of the outdoor heat exchange chamber 14 in the above embodiment, the intake pipe 21a may be opened inside the engine room 7. In this way, the relatively low temperature air in the piping chamber 10 is supplied into the engine, and the charging efficiency is improved. When the engine 5 is taken out of the engine room 7 for inspection and maintenance, the engine 5 can be taken out without removing the intake pipe, so that the inspection and maintenance can be improved accordingly.

Further, the compressor 6 disposed on the right side of the engine
Since the air cleaner 21c and the exhaust silencer 23c are arranged by effectively utilizing the upper space of the engine 5, and the gas mixer 21b is arranged on the right side of the engine 5, the piping length of the intake hoses 21a 'and 79 is reduced. In addition, piping 6
9, 80, 23a ', a part of 84a, 84b, 84c, a flow control valve 22a, a solenoid valve 24b, an oil level gauge 5
z is located at a position where there is no obstacle ahead, so the front side plate 3
Inspection work without 7a is facilitated. In addition, neutralization 8
Numeral 2 is disposed by effectively utilizing the lower space of the compressor 6. Piping 30c, 29 between the piping chamber 10 and the heat exchange chamber 14
Since all of c, 29d, 16b, and 16c are concentrated on the right side where the accumulator 8 is arranged, piping work is easy. Also, the attachment and detachment of the sealing pad 49 to and from the through portion of the center partition plate 40c is easy. Since the oil tank 24a and the reserve tank 30 are arranged near the piping chamber 10 and further near the accumulator 8, there is a cooling effect. Since the main journal bearing 65 of the crankshaft 5g is disposed at the joint between the cylinder block 5a and the oil pan 5b, a bearing cap is unnecessary. Further, since a recess is formed in the oil pan 5b toward the joint, the rigidity and strength of the oil pan 5b increase. The cylinder block 5a is made of aluminum alloy die-cast and made of a steel wet liner 500a.
Are inserted, and three O-rings 500b for water sealing are arranged below the wet liner 500a. With this structure, measurement of the engine 5 and improvement of workability can be achieved.

[0123]

According to the first aspect of the present invention, the heat is disposed obliquely.
Since ventilation outlets are provided between the lower ends of the exchangers,
The hot air in the engine room will not pass through the heat exchanger.
Heat exchange efficiency can be avoided.

Further , the heat exchanger is connected to each device in the piping room.
Pipes are routed together and pass through one pad
Thus, a plurality of conduits can be sealed with one pad.

[0125]

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of an engine-driven air conditioner according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional rear view of the apparatus of the embodiment.

FIG. 3 is a partial cross-sectional right side view of the apparatus of the embodiment (II in FIG. 2).
(I-III line sectional view).

FIG. 4 is a left side view (IV in FIG. 2) of a partial cross section of the apparatus of the embodiment.
-IV line sectional view).

FIG. 5 is a plan view of a floor member portion of the outdoor heat exchange chamber of the apparatus of the embodiment.

FIG. 6 is a cross-sectional plan view of an engine room and a piping room of the apparatus of the embodiment.

FIG. 7 is a partially sectional side view of the engine of the embodiment.

FIG. 8 is a schematic view showing a lubrication system of the engine of the embodiment.

FIG. 9 is a partially sectional front view of the engine of the embodiment.

FIG. 10 is a view showing a flow of lubricating oil in the engine of the embodiment.

FIG. 11 is a view showing an oil separation chamber of the engine of the embodiment.

FIG. 12 is a piping diagram of an intake system and an exhaust system of the apparatus of the embodiment.

FIG. 13 is a sectional front view showing an air cleaner and an intake pipe connection procedure of the apparatus of the embodiment.

FIG. 14 is a piping diagram of a lubricating oil supply system of the apparatus of the embodiment.

FIG. 15 is a front piping diagram of a cooling system of the apparatus of the embodiment.

FIG. 16 is a plan piping diagram of a cooling system of the apparatus of the embodiment.

FIG. 17 is a right side piping diagram of a cooling system of the apparatus in the embodiment.

FIG. 18 is a plan view of a pad of the device of the embodiment.

FIG. 19 is a cross-sectional right side view of a water injection port of the apparatus of the embodiment.

FIG. 20 is a rear view of the electrical box of the apparatus of the embodiment.

FIG. 21 is a cross-sectional side view of an electrical box of the apparatus of the above embodiment.

FIG. 22 is a right side view of the engine room of the apparatus of the embodiment.

FIG. 23 is a right side view of a water inlet of the above-described embodiment device.

FIG. 24 is a side view of the air cleaner of the apparatus of the embodiment.

FIG. 25 is a front view of an air cleaner of the apparatus of the embodiment.

FIG. 26 is a cross-sectional plan view of an air cleaner of the apparatus of the above embodiment.

FIG. 27 is a cross-sectional front view of the air cleaner of the apparatus of the embodiment.

FIG. 28 is a partial cross-sectional side view of an exhaust silencer of the device of the embodiment.

FIG. 29 is a front view of an exhaust silencer of the device of the embodiment.

FIG. 30 is a cross-sectional front view of the exhaust gas heat exchanger of the above embodiment.

FIG. 31 is a system diagram showing the overall configuration of the apparatus of the embodiment.

FIG. 32 is a system diagram showing a lubricating oil system of the apparatus of the embodiment.

FIG. 33 is a block diagram of a lubricating oil amount control device of the device of the embodiment.

FIG. 34 is a flowchart showing a lubricating oil amount control of the apparatus in the embodiment.

FIG. 35 is a schematic view showing an example in which an opening / closing window is provided at a water supply port in the apparatus of the embodiment.

FIG. 36 is a schematic cross-sectional view of a casing of the device of the embodiment.

[Explanation of symbols]

 Reference Signs List 1 engine-driven air conditioner 5 engine 7 engine room 13 heat exchanger for engine cooling water 14 outdoor heat exchange chamber 23b exhaust gas heat exchanger 28a cooling water pump 28b engine cooling jacket 28c switching valve (top of low temperature cooling water circulation circuit ) 28e Cooling water pump 29g Accumulator heat exchange section 29f 'Water conduit (first return passage) 29p Water conduit (second return passage) 30b Water inlet A Bypass passage

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 5/00 F01P 3/20

Claims (1)

(57) [Claims] 1. An engine room in which an engine is arranged and each device
A piping room with pipes connecting them together, and front and rear sides
An outdoor heat exchange chamber in which a heat exchanger is disposed, and the outdoor heat exchange
In the cooling device for an engine-driven air conditioner provided with a blower fan for outdoor heat exchange disposed at the upper end opening of the room, the engine room and the piping room are separated from the outdoor heat exchange room.
Plate and place the heat exchanger near the front and rear sides.
The lower part of the partition plate.
Between the lower ends of the heat exchanger and in the engine room
Form a ventilation outlet to be located in the well
Through the ventilation outlet from the engine room
Exhaust into the heat exchanger outside the storage room,
Connect each pipe connecting the equipment to the heat exchanger of the partition plate.
Together at the end between the lower ends of the
Are arranged so as to penetrate through the placed sealing pad, and
A cooling device for an engine-driven air conditioner, wherein a number of conduits are sealed with one pad .