JPH0814695A - Engine-driven type heat pump device - Google Patents

Abstract

PURPOSE:To provide an engine-driven type heat pump device which is constituted to prevent deterioration of oil for lubricating an engine by a method wherein a lubricating oil tank is arranged in a place, where temperature is low, in an outdoor machine. CONSTITUTION:In an engine-driven type heat pump device, an outdoor machine is partitioned into an engine chamber 7 to contain an engine 5 and a heat- exchanger chamber to contain a heat-exchanger, and a lubricating oil tank 24a to contain oil for lubricating the engine 5 is arranged in the heat-exchanger room.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine driven heat pump device using an engine as a drive source of a heat pump, and an engine driven heat pump device having a lubricating oil supply device for an engine or the like in an outdoor unit applied to air conditioning equipment. Regarding

[0002]

2. Description of the Related Art An engine-driven heat pump device is applied to, for example, an air conditioner, and some outdoor units are equipped with a lubricating oil supply device for an engine. Conventionally, the outdoor unit is divided into an engine room for accommodating the engine and a heat exchanger room for accommodating the heat exchanger, and a lubricating oil tank for replenishing oil for lubricating the engine is arranged in the engine room. .

[0003]

By the way, the oil that lubricates the engine may deteriorate if left in a high temperature environment for a long period of time.

As the deterioration of the oil that lubricates the engine progresses in this manner, the deteriorated oil is supplied during long-term use of the engine, which is one of the causes of deterioration of the durability of the engine.

The present invention has been made in view of the above circumstances, and an engine-driven heat pump device for preventing deterioration of oil for lubricating an engine by arranging a lubricating oil tank in a place having a low temperature in an outdoor unit. Is intended to provide.

[0006]

In order to solve the above-mentioned problems, an engine-driven heat pump device according to a first aspect of the present invention includes an outdoor unit, an engine room accommodating an engine, and a heat accommodating a heat exchanger. The heat exchanger chamber is characterized in that a lubricating oil tank, which is partitioned into an exchange chamber and stores oil for lubricating the engine, is arranged in the heat exchange chamber.

According to another aspect of the present invention, there is provided an engine-driven heat pump device comprising an outdoor unit, an engine room accommodating an engine, a heat exchanger room accommodating a heat exchanger, and a compressor driven by the engine. It is characterized in that it is divided into a piping chamber containing an accumulator arranged in the middle of a circulating refrigerant circuit, and a lubricating oil tank containing oil for lubricating an engine is arranged in the heat exchanger chamber and / or the piping chamber. There is.

[0008]

According to the first aspect of the present invention, the engine room and the heat exchanger room for accommodating the heat exchanger are partitioned, and the lubricating oil tank is arranged in the partitioned heat exchanger room. In addition, the deterioration of oil is prevented by arranging the lubricating oil tank in the heat exchanger chamber having a low temperature inside the outdoor unit.

According to the second aspect of the present invention, the engine room, the heat exchanger room, and the piping room accommodating the accumulator arranged in the middle of the refrigerant circuit circulated by the compressor driven by the engine are partitioned. The deterioration of oil is prevented by arranging the lubricating oil tank in the heat exchanger room or the piping room where the temperature is low and the influence of heat of the engine is reduced in the outdoor unit.

[0010]

Embodiments of an engine-driven air conditioner to which an engine-driven heat pump device of the present invention is applied will be described below with reference to the drawings.

FIGS. 1 to 15 are for explaining one embodiment of an engine-driven air conditioner, FIG. 1 is a diagram showing the overall structure of an engine-driven air conditioner, and FIG. 2 is an outdoor air conditioning unit. Of FIG. 3, FIG. 3 is a right side view of the outdoor air conditioning unit, FIG. 4 is a plan view of the floor of the outdoor heat exchanger room, and FIG.
Is a plan view of the pad, FIG. 6 is a schematic cross-sectional plan view of the engine room and piping room, FIG. 7 is a cross-sectional view of the electrical equipment box, FIG. 8 is a layout view of the engine cooling water injection port portion, and FIG. Cross section,
10 is a sectional view of an exhaust heat exchanger, FIG. 11 is a front view of a lubricating oil supply device for an engine, FIG. 12 is a sectional view of an engine, FIG. 13 is a sectional view of a cylinder head cover, and FIG. 14 is a lubricating oil supply device for an engine. FIG. 15 is a block diagram showing a schematic configuration of an outer plate wall of the outdoor air conditioning unit.

First, in the figure showing the overall structure of the engine-driven air conditioner of FIG. 1, the engine-driven air conditioner 1 is an outdoor air conditioning unit (hereinafter also referred to as an outdoor unit).
2 and an indoor air conditioning unit 3. The indoor air conditioning unit 3 includes an indoor heat exchanger for refrigerant 4, an expansion valve 18 for decompression, and a fan for indoor heat exchange (not shown). The outdoor air conditioning unit 2 includes an engine room 7 in which an engine 5, compressors 6, 6 and the like are arranged, a main accumulator (hereinafter, also referred to as a waste heat recovery device) 8, a sub accumulator 9, an electrical equipment box 50, and each device. A pipe chamber 10 in which a pipe line for connecting the above is arranged, a radiator outdoor upper heat exchanger 11, a refrigerant outdoor lower heat exchanger 12 and a radiator as a heat exchanger for engine cooling water (hot water heat exchanger) An outdoor heat exchanger chamber 14 in which 13 and the like are arranged. As shown in FIG. 4, the upper heat exchanger 11 has two similar elements arranged side by side, and is shown as one for convenience in FIG.

A water-cooled gas fuel engine is used as the engine 5, and an intake pipe 21a is provided at an intake port of the engine 5.
A gas mixer 21b and an air cleaner 21c are connected to each other via an intake pipe 21a, and the intake pipe 21a penetrates the ceiling wall of the engine room 7 and the ceiling wall of the outdoor heat exchanger chamber to open 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 gas fuel source by a fuel line 22, and the gas mixer 21b is connected to the fuel line 22.
A flow rate control valve 22a, a zero governor (pressure reducing valve) 22b, and two solenoid valves 22c integrated with b are provided. Further, the exhaust port of the engine 5 has an exhaust pipe 23a.
Exhaust heat exchanger 23b, exhaust silencer 23c,
The mist separator 23e is connected to the exhaust pipe 23
The opening a is located above the heat exchange chamber 14.

The engine 5 has a lubricating oil tank 24a.
Is provided, the solenoid valve 24b opens when the amount of lubricating oil decreases, and the lubricating oil is supplied by gravity.

The output shaft of the engine 5 has a clutch 6a,
Compressors 6 and 6 are connected via 6a. Compressor 6
Is connected to the refrigerant outdoor upper heat exchanger 11 and the refrigerant outdoor lower heat exchanger 12 via the refrigerant pipe 16a, the four-way valve 15 switched to the cooling operation position, and the refrigerant pipe 16b. The heat exchangers 11 and 12 include a refrigerant pipe line 16c, a heat exchange section 16e in the main accumulator 8, and a refrigerant pipe line 17c.
It is connected to the refrigerant indoor heat exchanger 4 via a, and the refrigerant indoor heat exchanger 4 is connected to the refrigerant conduit 17b, the four-way valve 15,
It is connected to the suction ports of the compressors 6 and 6 via the refrigerant pipe line 16d, the main accumulator 8 and the sub accumulator 9. In addition, 102 is a dryer and 103 is a filter that bypasses the liquid.

Numerals 900 and 901 are capillaries, and
Reference numerals 10 and 910 each are a combination of a temperature detector and a capillary tube, and are for detecting the level of the liquid-phase refrigerant in the main accumulator 8 by detecting the refrigerant temperature. Further, 911 is an opening / closing valve, and 912 is an oil discharge passage. When the amount of oil accumulated in the lower part of the accumulator increases, the opening / closing valve 911 is opened manually or automatically so that the oil flows from the main accumulator 8 to the sub accumulator 9. .

An oil separator 19a for separating lubricating oil in the refrigerant is provided in the middle of the refrigerant pipe 16a. When the amount of lubricating oil separated by the oil separator 19a exceeds a predetermined value, an oil strainer 19b is provided. , Is returned to the main accumulator 8 via a solenoid valve 19c that opens when the value is above a predetermined value. The lubricating oil is also returned to the sub accumulator 9. Further, the refrigerant pipe line 16a is an oil strainer 20a, and a solenoid valve 20 that opens when the internal pressure of the pipe is equal to or higher than a predetermined pressure.
connected to the main accumulator 8 via b,
This avoids an abnormal rise in the refrigerant line pressure.

Reference numeral 90 is an electromagnetic valve, and 91 is an oil strainer. When the load on the indoor unit 4 is particularly small during cooling, the electromagnetic valve 90 opens so that the refrigerant bypasses the indoor unit 4 and flows to the main accumulator 8. And try to balance the load.

An outdoor unit cooling water circulation system S serving as the outdoor air conditioning unit 2 is provided. The cooling water circulation system S circulates the cooling water jacket 28b, the thermostat 28c, and the first cooling water pump 28a of the engine 5 when the cooling water temperature is equal to or lower than a predetermined value.
Circulation paths 29a1, 29a2, 29q, 29s, when the engine is cold, exhaust heat exchanger 23b, linear three-way valve 28d,
One is radiator 13 and the other is main accumulator 8
The second heat exchanger 29g and the second circulation paths 29e1, 29e2, 29r, 29b, which circulate through the second cooling water pump 28e,
29c, 29d, 29f1, 29f2, 29p, the exhaust heat exchanger 23b, the first cooling water pump 2 when the engine is warmed up when the cooling water temperature exceeds a predetermined value.
8a, a cooling water jacket 28b of the engine 5, a thermostat 28c, a linear three-way valve 28d, a radiator 13 on the one hand, and a heat exchange section 29 in the main accumulator 8 on the other hand.
g, the third circulation paths 29e1, 29e2, 29s, 29a1, 29a2, which circulate in the order of the second cooling water pump 28e.
29b, 29c, 29d, 29f1, 29f2, 29p
have. As will be described later, the first cooling water pump 28a is arranged near the opening of the introduction passage in the engine room or in the piping room.

A cooling water reservoir tank 30a is connected to the radiator 13 via a water pipe 30c and an inlet 30b. Thermostat 2 at inlet 30b
One port of 8c is also connected, thermostat 28c
Consists of a jiggle valve. The port of the thermostat 28c is always in communication with the cooling water jacket 28b via a throttle, and the first circulation paths 29a1 and 29a when the engine is cold.
It is possible to bleed air in 2, 29q and 29s. In addition,
The water tank 30a for cooling water also has a water injection port 30d at the top.
A communication passage 30e for communicating with the atmosphere is provided.

The engine cooling water is supplied by the linear three-way valve 28.
When d is switched, it is supplied to the heat exchanging portion 29g in the main accumulator 8 by the water pipe 29d, thereby giving heat to the refrigerant.

Next, a specific structure of the outdoor air conditioning unit 2 will be described in detail with reference to FIGS. 2 to 15.

The casing 31 of the outdoor air conditioning unit 2 is
A floor board 33 is placed and fixed on a pair of bases 32, and pillars 34 are erected at four corners, and the upper ends of the four pillars 34 are respectively placed on the right side surface and the left side surface. The floor beams 33 are connected by a ceiling beam (not shown), and the front and rear ends of the floor plate 33 are bent to form a floor beam 33a. Left and right side faces are left and right side plates 37c, 37.
The ceiling surface is covered with a top plate 37e at d. The top plate 37e is bent at its front, rear, left, and right ends to allow each plate 37
The connection part with a-37d or the pillar 34 is formed.

Further, as shown in FIG. 15, the front side surfaces of the left and right front side plates 37a, 37a whose upper ends are respectively bent by the bent engine room side partition plates 41a, 41b.
Are fastened with a tightening screw 35. Similarly, the rear side is
The right and left rear side plates 37b and 37b are attached to the bent pipe chamber side partition plates 42a and 42b when viewed from the front with the upper ends bent.

The front and rear side plates 37a and 37b are the casing 3
1 covers front and rear side portions of the lower side of a partition plate 39, which will be described later, and these front, rear, left and right side plates 37a to 37d.
Is detachable to ensure maintainability of each device.

Further, the front side plate 37a on the front and rear side of the casing 31 and the upper part of the rear side plate 37b are openings for introducing the outside air, and each opening has a wire mesh 38a functioning as a filter.
38b is detachably attached to each of the upper and lower sides of the horizontal frames 36a and 36b. A discharge opening 37f for discharging the introduced outside air upward is formed in the top plate 37e, and the outside air is sucked into the outdoor heat exchanger chamber 14 from the wire nets 38a, 38b at the discharge opening 37f. A blower fan 44 for outdoor heat exchange that discharges upward is provided. Discharge opening 37
A wire mesh 38c is erected around f.

The partition plate 39 is for defining the outdoor heat exchanger chamber 14, the engine room 7 and the piping room 10,
It is composed of a central partition plate 40 and engine room side partition plates 41a and 41b that form the ceiling of the engine room 7, and pipe room side partition plates 42a and 42b that form the ceiling of the pipe room 10. Engine room side partition plates 41a, 41b and piping room side partition plate 42
The a and 42b are detachable upward.

At the time of removal, the front and rear side plates 37a, 37
b is also removed, the engine room 7 is open 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, and the equipment in each room is opened. Easy maintenance work.

Further, the central partition plate 40 and the partition wall 4 on the piping chamber side
At the boundary between 2a and 42b and on the outer upper side (upper side on the piping chamber 10 side) of the rear middle plate 44a which constitutes the front side wall of the engine room 7, a gutter 48 (drainage passage) is provided at the center of these and a partition on the piping chamber side. It is arranged so that it can be disassembled from the plates 40, 42a, 42b, that is, it can be replaced with a new one. The gutter 48 is a groove-like member extending in the longitudinal direction of the outdoor air-conditioning unit 2 (horizontal direction in FIG. 1), that is, in the direction of the arrangement surface of the heat exchanger, and is inclined so that it becomes lower toward the left side. The right end portion 48b located at the highest position 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 dropping holes may be provided in the V-shaped bottom above the gutter 48.

Further, a cylindrical vertical gutter (drainage pipe) 43 is detachably connected to the left end 48a located at the lowest position of the horizontal gutter 48. The vertical gutter 43 extends downward at a corner portion formed by the inner surface of the left side plate 37c and the outer surface of the rear middle plate 44a forming the front side wall of the engine room 7, and the drain port 43a opening at the lower end thereof is a floor plate. It is located below 33 and faces outward. The vertical gutter 43 can be replaced with a new one by removing the left side plate 37c.

The engine room side partition plates 41a, 41b, the pipe room side partition plates 42a, 42b, and the center partition plate 40 are inclined so that they are lower toward the side gutter 48 side. for that reason,
Rainwater that entered the outdoor heat exchanger room 14 immediately
The water is collected in 8 and is discharged to the outside through the vertical gutter 43. Further, the engine room side partition plates 41a and 41b, the piping room side partition plate 4
2a, 42b and the center partition plate 40 are inclined so that the engine room side partition plates 41a, 41b and the piping chamber side partition plates 42a, 42
The position of the outer end of b becomes higher, and the front and rear side plates 37a, 3
The opening is large when you remove 7b and inspect the interior.

Further, the central partition plate 40 is provided with two ventilation air discharge ports 40b so as to open into the outdoor heat exchanger chamber 14. The outlet 40b is surrounded by a muffling box 40c. The opening 40d of the silencing box 40c is located above the lateral gutter 48, and is located downstream of the lateral gutter 48 with respect to the discharge port 40b.
As a result, rainwater that has entered the outdoor heat exchanger chamber 14,
Alternatively, rainwater or the like flowing in the gutter 48 is prevented from entering the engine room 7 through the discharge port 40b.

A sponge-like sound absorbing sheet is attached to the inside of the sound deadening box 40c.

The side walls of the engine room 7 are a front side plate 37a, a left side plate 37c, a rear middle plate 44a and a right middle plate 44b, top walls are engine room side partition plates 41a, 41b and a central partition plate 40, and a bottom wall. Is a bottom plate 45 that is spaced apart from the floor plate 33.
Each is composed of. Rear middle plate 44a, right middle plate 44
The upper and lower end surfaces of b are airtightly connected to the partition plate 39 and the floor plate 33, and the engine room 7 is thus constructed to have a soundproof structure. The rear middle plate 44a and the right middle plate 44b are the engine room 7
And the partitioning room of the piping room 10.

The space between the bottom plate 45 and the floor plate 33 is a box-shaped ventilation passage 46, and the bottom plate 45 has a large number of ejection ports 45a for blowing ventilation air into the engine room 7 over the entire surface. They are arranged and formed substantially evenly. In addition, on the right middle plate 44b side of the ventilation passage 46, an opening 2 is formed in the piping chamber 10.
One engine room air intake port 46a is formed, and a ventilation fan 47 is arranged at each air intake port 46a. The drain 43a of the vertical gutter 43 is provided on the opposite side of the engine room air intake 46a, that is, at a position sufficiently separated from the air intake 46a.

On the inner surface side of the rear side plate 37b in the piping chamber 10,
An electric equipment box 50 in which various control devices and the like are housed is arranged. An air inlet 50a is formed on the bottom surface of the electrical equipment box 50, and an exhaust port 50b is formed on the upper portion of the side surface, and a gap serving as an air passage is formed between the bottom surface and the floor plate 33. The floor plate 33 is filled with outside air in the piping room 1
A piping chamber air intake 33b for introducing the air into the inside of the pipe 0 is formed, and outside air is introduced into the piping chamber 10 through the air intake 33b. In addition, a part of the introduced outside air is introduced into the electrical equipment box 50 through the air intake port 50a and discharged through the exhaust port 50b to ventilate the inside of the electrical equipment box 50. Further, the drainage port 43a of the vertical gutter 43 is separated from the piping chamber air intake port 33b and is located below.

There is no floor plate 33 below the terminal chamber 699, and there is no ceiling. The terminal chamber 699 is a communication passage that connects the piping chamber 10 and the outside of the casing 31. Also,
The terminal chamber 699 is opened rearward with the rear side plate 37b removed. Each joint 800 of the refrigerant pipes 800 and 801
a, 801a and the fuel line 22d, the terminal chamber 69
9 and is connected to external pipes introduced from below the terminal chamber 699. Connected to external power supply. A cord having a plug at its end also passes through the terminal chamber 699.

In the outdoor heat exchanger chamber 14, the upper outdoor heat exchangers 11 and 11 for refrigerant are provided at the upper front and rear sides, the lower outdoor heat exchanger 12 for refrigerant is provided at the lower rear portion, and the engine cooling is provided at the lower front portion. A radiator 13 as a heat exchanger for water is provided. The outdoor upper heat exchangers 11, 11 for refrigerant are arranged in the vertical direction and along the wire nets 38a, 38b, while the lower outdoor heat exchanger 12 and the radiator 13 are located inward toward the lower side. The radiator 13 is provided with a water injection port 30b at the upper right end.

The water injection port 30b is, as shown in FIGS. 8, 9 and 11, a horizontal frame 36 forming a side wall of the casing 31.
A water supply cylinder 60 that is connected to the upper end of the head pipe 13c of the radiator 13 that is disposed diagonally upward and that faces the injection door 63 provided on the right end portion of the a and the column 34, and the opening 60a of the water supply cylinder 60. A cap 61 for opening and closing the
The pressure valve 62 arranged in the cap 61
It has and. The opening 60a is opened obliquely upward toward the metal net 38a forming the side wall of the casing 31 of the outdoor air conditioning unit 2. The pressure valve 62 is adapted to open and close a valve seat opening 60a formed in an intermediate portion of the water supply cylinder 60 by its valve body 62b, and the valve body 62b is biased in the closing direction by a spring 62a.

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, and residual air, steam or hot water is guided to the cooling water reservoir tank 30a, and abnormal steam pressure is generated in the circulation circuit components. Is also protected. The pressure valve 62c opens and allows a flow from the outside to the inside when the pressure difference between the outside and the inside of the circulation circuit exceeds a predetermined value.

The engine 5 is stopped, the cooling water temperature drops,
When the water vapor in the circulation circuit condenses and the internal pressure falls below atmospheric pressure and the pressure difference between the outside and the inside increases, the pressure valve 60c opens and the water in the cooling water reservoir tank 30a is pushed up by the atmospheric pressure. , Is replenished in the circulation circuit.

When the cap 61 is removed for checking the cooling water,
The airtightness due to the seal 61a is lost, and the water in the conduit 30c returns to the cooling water reservoir tank 30a,
The water level will drop.

The water vapor in the circuit due to engine operation, even if it passes through the pressure valve 62, the water vapor is moved to the cooling water reservoir tank 30a, and the water level corresponding to the water vapor amount that has moved due to the engine stop is repeatedly raised. The water level rises gradually and it becomes possible to replenish the circulation circuit, but until then, the amount of cooling water may be insufficient.
However, in this embodiment, the position of the water supply pipe 60 is downward, the water level rises quickly, and the amount of cooling water is unlikely to be insufficient. Therefore, the heat exchange in the main accumulator 8 or the radiator 13 can be sufficiently performed. That is, even if the vapor pressure generated due to heat exchange decreases, the time until replenishment becomes possible is shortened.

The lower end of the radiator 13 is located above the engine room side partition plates 41a, 41b and on the upper corner of the central partition plate 40 and the sound deadening box 40c. Further, the lower end of the outdoor lower heat exchanger 12 for refrigerant is provided with a partition plate 42 on the tube chamber side.
a, 42b and beyond the gutter 48, a central partition plate 40
And the sound deadening box 40c is located on the lower corner.

Radiator 13, refrigerant heat exchangers 11, 1
2 and each of the pipelines 29c, 2 that connect to each device in the piping room 10
9d, 16b, 16c and 30c are arranged on the right side plate 37d side of the piping chamber 10 and in the center part in the front-rear direction, and penetrate through one sealing pad 49 arranged at the left end part of the center partition plate 40. In this way, a plurality of conduits are sealed by one pad.

The sealing pad 49 has notches 49a for connecting the conduit holes and the ends on the left side plate 37c side. As a result, 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. A central partition plate 40 is provided around the sealing pad 49.
By forming the right side plate 37d in a sealed state,
The piping chamber 10 and the heat exchange chamber 14 are partitioned.

The pipes connected to the heat exchangers 11 to 13 are arranged diagonally along the oblique arrangement of the lower heat exchanger 12 and the radiator 13.

As described above, the engine room 7 and the piping room 10 are arranged side by side in the longitudinal direction of the outdoor unit which is the outdoor air conditioning unit 2, and the ventilation passage 46 is arranged under the engine room 7 and the ventilation passage 46 and the piping are arranged. A ventilation fan 47 is arranged between the room 10 and the room. A main accumulator 8 and a sub accumulator 8 are arranged side by side in the longitudinal direction on the rear side in the piping chamber 10, and an oil supply tank 24a and a cooling water reserve tank are provided in a position facing the ventilation fan 47 in the piping chamber 10. By disposing 30a, the temperature deterioration of the oil can be prevented. The recess 2 on the front side of the oil supply tank 24a
The cooling water reserve tank 30a is located at 4a1. Further, the supply port 24a of the oil supply tank 24a
2. All of the supply port 30a1 of the cooling water reserve tank 30a and the supply port 30a2 to the radiator 13 are arranged on the engine forward tilt side, that is, in front of the outdoor unit 2 in the front-rear direction, and the front plate 37a is removed to maintain the engine 5. It can be easily replenished.

An inspection device T used for maintenance and inspection of the outdoor air conditioning unit 2 is arranged in the engine room 7 so as to face the front side plate 37a, and can be easily operated by removing the front side plate 37a. Further, in the engine room 7, the engine 5 and the compressor 6 are arranged side by side in the longitudinal direction.

An air cleaner 21c is arranged above the compressor 6, and an exhaust silencer 23c and an oil separator 23d are arranged side by side. Air cleaner 21c
The intake pipe 21a connected to the upstream side of the air cleaner penetrates through the central partition plate 40 that constitutes the ceiling wall of the engine room 7 and the ceiling plate 37e that constitutes the ceiling wall of the outdoor heat exchanger chamber 14, and opens to the outside to form an air cleaner. The gas mixer 21b connected to the downstream side of 21c is connected to the intake port of the engine 5. The exhaust pipe 23a connected to the upstream side of the oil separator 23d penetrates the central partition plate 40 that constitutes the ceiling wall of the engine room 7 and the ceiling plate 37e that constitutes the ceiling wall of the outdoor heat exchanger chamber 14, and opens to the outside. The exhaust silencer 23c connected to the downstream side of the oil separator 23d is connected to the exhaust heat exchanger 23b.

The exhaust heat exchanger 23b is arranged on the front side of the engine 5, the exhaust outlet 23b1 is arranged on the longitudinal compressor side of the exhaust heat exchanger 23b, and the gas mixer 21b having a built-in throttle is arranged beside the cylinder head 5a. Then, the gas mixer 21b and the intake silencer 21c are connected to the intake pipe 21a1.
Connected with. The compressor 6 is arranged on the extension of the crankshaft of the engine 5 and is located at a position lower than the entire cylinder head 5a of the engine 5, whereby the upper space of the compressor 6 can be effectively used, and the air cleaner 21c and the exhaust gas can be exhausted. The silencer 23c and the oil separator 23d are arranged side by side, so that the engine room 7 can be made smaller. In addition, the exhaust pipe 23a1 between the exhaust heat exchanger 23b and the exhaust silencer 23c.
And the workability of attaching and detaching the exhaust pipe 23a1 is improved.

When the exhaust gas flows through the exhaust pipes 23a and 23a1 and the exhaust silencer 23c, it is cooled and separated from the exhaust gas to generate drain water having an acidic content. Also in the mist separator 23e, drain water having an acid content is generated by being separated from the exhaust gas. Each of these drain water is pipe 10
It is guided to the neutralizer 104 via 1, 102, 103, the drain water is neutralized by the neutralizer 104, and the drain water is discharged through the pipe 105. The oil separator 23d communicates with the oil pan of the engine 5 through the oil return passage 106, and also communicates with the cylinder head 5a through the breather passage 107.

An air cleaner 21c, an exhaust silencer 23c, and a mist separator 23e are arranged in a space above the compressor 6 connected to the engine 5 inside the engine room 7 at a position other than above the engine 5, and below the compressor 6. Neutralizer 1
04 is arranged, the positional relationship between them is higher than the neutralizer 104, the exhaust heat exchanger 23b is arranged, and the air cleaner 21c, the exhaust silencer 23c, and the mist separator 23e are arranged at higher positions. The height can be lowered. In addition, the condensed water in the exhaust heat exchanger 23b can be reliably guided to the neutralizer 104. Also, the mist separator 2
Condensed water in 3e can be reliably led to the neutralizer 104.

Further, since the exhaust silencer 23c, the mist separator 23e and the neutralizer 104 are arranged on the right side of the indoor air conditioning unit 2 and the drain port of the exhaust heat exchanger 23b is also arranged on the right side, the drain water pipe 101 , 102,
The length of 103 is short and drain water does not stay.

The air cleaner 21c and the oil separator 23d are adjacent to each other in the vicinity of the intake air intake of the engine 5, and the conduit 108 for guiding the breather gas after separating the oil in the oil separator 23d to the air cleaner 21c can be shortened. Further, the intake pipe 21a1 between the air cleaner 21c and the gas mixer 21b of the engine 5 can be shortened.

Next, the exhaust heat exchanger 23b will be described. The exhaust heat exchanger 23b is configured as shown in FIG. The exhaust heat exchanger 23b is assembled on the side of the engine 5 on the exhaust side, and the engine 5 and the exhaust heat exchanger 23b are integrated.

The exhaust heat exchanger 23b is provided with an upstream heat exchange section 210 having an unevenness in the expansion chamber of the exhaust passage, and a downstream heat exchange section 211 having an exhaust passage formed of a screw pipe having a non-circular cross section. ing.

The upstream heat exchange section 210 is a casing 207.
An expansion chamber 212 having a U-shaped exhaust passage is formed therein, and in the expansion chamber 212, unevenness is formed by fins 213 and protrusions 214. In the expansion chamber 212, a partition wall 207d extends from one side portion 207c close to the other side portion 207e, and the upper expansion chamber 2 communicated with the side portion 207e side.
12a and the lower expansion chamber 212b are formed.

An upper cooling water passage 215a is formed around the upper expansion chamber 212a of the exhaust passage of the upstream heat exchange section 210, and the upper cooling water passage 215a extends to the partition wall 207d. Further, a lower cooling water passage 215b is formed around the lower expansion chamber 212b, and the cooling water entering from the cooling water inlet 226 flows to the right in the downstream heat exchange section 211 and then enters the lower cooling water passage 215b. , This lower cooling water passage 215b
Flow into the upper cooling water passage 215a, and then to the right through the upper cooling water passage 215a, discharged from the cooling water outlet 215c formed at the upper right end of the casing 207,
Enter the cooling water pipe 29e2.

The upstream heat exchange section 210 is a casing 207.
A connection part (not shown) is formed in the engine 5, and this connection part is connected to the engine 5
It can be directly connected to the exhaust side of. Exhaust gas from the exhaust side of the engine 5 is introduced into the upper expansion chamber 212a from the exhaust gas inlets 216 formed at four locations of the casing 207, and this exhaust gas is guided to the lower expansion chamber 212b and further downstream side heat exchange section. You are led to 211.

As described above, the high-temperature, high-pressure exhaust gas generated by the combustion of the air-fuel mixture in the combustion chamber of the engine 5 is introduced into the upstream heat exchange section 210 of the exhaust heat exchanger 23b, where it is cooled with cooling water. It is cooled by exchanging heat between them.

Due to the expansion chamber 212 of the exhaust passage of the upstream heat exchange section 210, the exhaust resistance of the exhaust gas from the exhaust side of the engine 5 is reduced, and the exhaust efficiency is improved.
In addition, the exhaust pressure is reduced and the sound deadening effect is improved. Moreover, the fins 2 are installed in the expansion chamber 212 of the upstream heat exchange section 210.
Concavities and convexities are formed by the protrusions 13 and the protrusions 214, and the surface area is increased by the concavities and convexities, and high heat exchange efficiency can be obtained.

The exhaust gas passage of the downstream heat exchange section 211 is constituted by a screw pipe 220 having a non-circular cross section,
A closing plate 221 is provided at one end of the plurality of screw pipes 220, a gasket 222 is provided at the other end, and a guide plate 223 is provided at an intermediate portion to form a pipe unit 224. This screw pipe 220
Has a cruciform cross-section and projects radially outwardly 4
The two convex portions 220a draw a spiral along the lengthwise direction on the outer circumference of the screw pipe 220.

The pipe unit 224 is a casing 207.
The cooling water inlet 226 is formed below the cooling water chamber 225, and the cooling water outlet 227 is formed above the cooling water inlet 226. Cooling water is supplied from the engine 5 to the cooling water chamber 225 from the cooling water inlet 226,
It circulates through the cooling water chamber 225 and is supplied from the cooling water outlet 227 to the lower cooling water passage 215b of the upstream heat exchange section 210.

Closing plate 22 of pipe unit 224
1 is sealed with an O-ring 228, and the gasket 2
The cover 230 is fastened and fixed to the lower portion of the side portion 207e of the casing 207 with a bolt 231 via 29.
A collective exhaust chamber 232 is formed by the cover 230.
An exhaust gas outlet 233 is provided in the central portion of 30, and a drain water outlet 234 is provided below the cover 230.

On the other side of the pipe unit 224, the gasket 222 is fixed to the side portion 207 of the casing 207 by the bolt 235.
c, the cover 236 is fastened to the lower part of the casing 207 with the bolt 237 via the gasket 222.
It is fastened and fixed to 07c. The cover 236 forms a communicating and collecting exhaust chamber 238, and the exhaust gas is introduced into the communicating and collecting exhaust chamber 238 from the lower expansion chamber portion 212b of the upstream heat exchange section 210. This exhaust gas is guided from the communicating collective exhaust chamber 238 to the collective exhaust chamber 232 through the screw pipe 220 of the pipe unit 224, and is exhausted from the collective exhaust chamber 232 from the exhaust gas outlet 233.

As described above, since the exhaust passage of the downstream heat exchange section 211 is constituted by the screw pipe 220,
The exhaust gas flows as a swirling flow in the screw pipe 220, and the turbulent effect of the exhaust gas increases the heat transfer coefficient of the exhaust gas to the cooling water, resulting in high heat exchange efficiency.

In the exhaust heat exchanger 23b, the exhaust gas exchanges heat with the cooling water in the upstream heat exchange section 210 and the downstream heat exchange section 211, and the heat contained therein is effectively recovered. At the same time, its temperature and pressure are lowered to reduce exhaust noise.

Next, a concrete example of the engine 5 will be described with reference to FIGS. In the engine 5, a cylinder block 301 is fixed to an oil pan 300 that also serves as a crankcase, and the cylinder block 301 is inclined forward. A cylinder head 302 is placed on the cylinder block 301, and a cylinder head cover 303 is attached to the cylinder head 302.

Reference numeral 401 is a main journal bearing of the crankshaft 335, that is, a fastening bolt for fastening the oil pan 300 to the cylinder block 301 around the crank journal 358. This eliminates the need for so-called bearing caps.

The cylinder head cover 303 is inclined forward by a predetermined angle θ with respect to the horizontal plane, an oil injection port 303b is formed on the front side of the upper portion 303a, and a cap 304 is provided via a packing 304 for sealing the oil injection port 303b. 305 is attached. The cap 305 faces the front side, can be easily attached and detached from the front side, and oil refilling work is easy. The cylinder head cover 303 has a rib 303c extending downward from the rear ceiling wall,
The plate 306 is attached by a mounting screw 307 so as to face the rib 303c, whereby an oil separation chamber 308 is formed. A vertically meandering passage 309 is formed in the oil separation chamber 308, and the meandering passage 30 is formed.
The oil is separated by 9 and returned to the inside of the cylinder head through oil return holes 306a and 306b formed in the rising portion of the plate 306. A connecting pipe 310 is provided above the cylinder head cover 303, and air containing oil is sent from the connecting pipe 310 to the oil separator 23d.

Mounting brackets 32 are provided in front of and behind the engine 5.
0 and 321, the mounting bracket 320 is fixed to the cylinder block 301, and the mounting bracket 321 is fixed to the oil pan 300 by bolts 322 and 323, respectively. The mounting brackets 320 and 321 are mounted on the mounting table 324.
5, 326 is attached to the attachment portions 325a and 326a. The engine 5 is mounted with anti-vibration rubbers 325 and 326, and has an anti-vibration structure.

In the cylinder block 301 made of aluminum alloy die-cast, a cast iron sleeve 330 has a lower portion with an O-ring 3.
30a is fitted in a watertight state, and a piston 331 is reciprocally provided on the sleeve 330. The piston 331 is connected to the connecting rod 3 via a piston pin 332.
The small end 333a of the crankshaft 33 is connected, and the large end 333b of the connecting rod 333 is connected to the crankshaft 3 via the crankpin 334.
The crankshaft 335 is rotated via the connecting rod 333 by the reciprocating motion of the piston 331. A combustion chamber 336 is formed between the top of the piston 331 and the cylinder head 302, and an intake passage 337 and an exhaust passage 33 formed in the cylinder head 302 are formed in the combustion chamber 336.
8 is open, and the openings are the intake valve 339 and the exhaust valve 34.
It is opened and closed by 0. Intake valve 339 and exhaust valve 340
Is operated by the valve mechanism 341, and this valve mechanism 341
Cam shaft 342 rotates in conjunction with crank shaft 335,
The cam 342a of the cam shaft 342 moves the push rod 343 up and down, whereby the rocker arm 344 moves up and down and the intake valve 339 and the exhaust valve 340 operate. An exhaust heat exchanger 23b is attached to the front side of the cylinder block 301, and exhaust gas is exhausted from the exhaust passage 338.
The gas is discharged to b and the intake pipe 23a is connected to the intake passage 337. The exhaust heat exchanger 23b is attached to the cylinder head 302 with attachment bolts 345 and to the cylinder block 301 with attachment stays 346. The engine 5 is arranged closer to the front side plate 37a side, and the front side plate 37a in front of the engine is removed to attach the mounting bolts 34 from the front side.
By removing 5 and removing it from the mounting stay 346, it is possible to easily attach and detach from the front side, and maintenance and inspection work is easy.

In this way, the engine 5 is tilted forward,
The exhaust port is arranged below the inclined shaft, the exhaust heat exchanger 23b is directly arranged below the exhaust port, the front side plate 37a is detachable, and the spark plug 400 is replaced and the cap 305 is removed. Lubrication becomes easier,
The maintainability of the engine 5 is improved.

Oil is stored in the oil pan 350 of the engine 5, and an oil level gauge 351 is detachably attached to the inside of the oil pan 350 from the front side of the engine 5. The oil level gauge 351 has a lower limit mark 351a.
And an upper limit mark 351b are attached so that the lower limit oil level and the upper limit oil level can be detected. An oil pump 352 is attached inside the front side of the cylinder block 301 of the engine 5.

A water jacket 360 is formed between the cylinder block 301 and the sleeve 330, and cooling water is supplied to the water jacket 360 from the pipe 29a1. The cooling water is supplied from the water jacket 360 to the cylinder head 3.
The water jacket 361 formed in No. 02 is circulated and cooled, and is sent out from the water jacket 361 to the pipe 29a2, and the cooling water cooling path is indicated by a two-dot chain line arrow.

Next, FIG. 12 shows the oil lubrication path.
And it demonstrates based on FIG. In FIG. 12, the oil lubrication path is indicated by a solid arrow.

When the oil pump 352 is driven, the oil is supplied to the main gallery 355 which is a hollow portion inside the cam shaft 342 through the filter 354. Relief valve 3
Reference numeral 53 is for allowing oil to escape into the oil pan 300 when the outlet side of the oil pump 352 becomes too high in pressure.

The relief valve 356 is the oil filter 3
Main gallery 35 as a bypass when 54 is clogged
It is for sending oil to 5.

From the main gallery 355 to the cam shaft journal 357, the crank journal 358, the connecting rod 33.
3 is sent to the large end 333b, and each is lubricated and returned to the oil pan 300. Further, it is sent from the main gallery 355 to each cylinder head 302 and returned to the oil pan 300 via the valve mechanism 344. The cylinder head 302 is provided with oil separation chambers 308, and the breather gas in the crank chamber from these oil separation chambers 308 passes through the breather passage 107 and the oil separator 23.
The oil in the breather gas sent to the d is captured and separated by the oil catcher and returned to the oil pan 300 through the oil return passage 106.

Further, the bearings 381, 38 which are sent from the oil pump 352 to the transmission gear case 380 via the oil filter 354 and are provided in the transmission gear case 380.
2. Lubricate the gear 383 and return it to the oil pan 300.

The engine 5 is provided with a lubricating oil supply device J, and the lubricating oil tank 24a is opened by opening the solenoid valve 24b.
Is supplied with oil. The lubricating oil tank 24a is provided with an oil inlet 24a1 and a cap 24a2.
And the oil is replenished from the oil inlet 24a1.

Lubricating oil replenishing device J is constructed as shown in FIG. An oil inlet 24a1 is provided on the upper portion of the lubricating oil tank 24a so as to face the front side, and the cap 24a2 can be easily attached and detached from the front side. An oil pipe 39 is provided below the lubricating oil tank 24a.
0 is connected, the oil pipe 390 passes under the engine 5, and the solenoid valve 24 attached to the stay 391.
It is connected to one joint 24b1 of b. An oil pipe 392 is connected to the other joint 24b2 of the electromagnetic valve 24b, and this oil pipe 392 is connected to an oil inlet 352a provided in the engine 5, and oil is poured from above the oil surface in the oil pan.

The solenoid valve 24b for supplying oil is fixedly installed on the floor, and the oil inlet 3 to the oil pump 352 is provided.
The oil pipe 392, which is an elastic rubber pipe, is connected between the pipes connecting the parts 52a, and the solenoid valve 24b and the lubricating oil tank 24a are similarly formed. After penetrating the right middle plate 44b, which is a partition wall between the chamber 10 and the engine room 7, it crawls on the floor in the engine room 7, and the oil pipe 390 of this side is long.

Although the engine 5 is vibratingly displaced, at least the oil pipe 392 can be relatively displaced by elasticity. In this embodiment, the oil pipe 390 is also the oil pipe 3.
92 and common pipe material are used.

Further, the oil pipe 392 which is an oil pipe line connecting the solenoid valve 24b and the oil inlet 352a to the oil pan 350 will be swung, but since the length is short, the inertial force also becomes small, and the oil pipe 392. Since a large stress is unlikely to occur at the base of the oil pipe, the durability of the oil pipe 392 is improved.

In addition, the lubricating oil tank 24a to the engine 5
Also has the same end portion and the oil inlet 2 of the lubricating oil tank 24a
4a1 is a water injection port 30a of the cooling water reserve tank 30a.
It is above 1 so it is easy to do water and oil replenishment work. In addition, the oil injection port 24 of the lubricating oil tank 24a
a1 is for pouring water with the oil inlet 24a2 open,
Even if water spills, it will not mix with the oil.

The shape of the lubricating oil tank 24a is shown in FIG.
As shown in FIG. 6, the cooling reserve tank 30a is L-shaped when viewed from the side, and the cooling reserve tank 30a is formed in the recess 24a3 of the lubricating oil tank 24a.
And the oil surface area of the upper part of the lubricating oil tank 24a is larger than that of the lower part. This makes it possible to store both the cooling reserve tank 30a and the lubricating oil tank 24a in a compact space.

Further, the cooling reserve tank 30a and the lubricating oil tank 24a are respectively provided with a water injection port and an injection port in front of them, so that workability can be improved.

Further, since the lubricating oil tank 24a is arranged above, the oil level can be raised even when the oil is reduced, and the oil level for the oil pan 300 can be set high for a long time. The oil can be replenished in a short time. A drain plug 300a is arranged in front of the lower surface of the oil pan 300, which facilitates oil removal work.

Next, a second embodiment corresponding to the present invention will be described.
A description will be given based on FIGS. 16 and 17. 16 is a front view of the outdoor air conditioning unit, and FIG. 17 is a plan view of the outdoor air conditioning unit.

In this embodiment, the same members as those in FIGS. 1 to 15 are designated by the same reference numerals and their explanations are omitted. The engine room 7 and the piping room 10 are partitioned by arranging a rear middle plate 44a and a left middle plate 44d in the lower part. The engine 5 is arranged on the right side of the engine room 7, and the compressor 6 is located on the left side of the engine 5. Heat exchanger room 14
A radiator 13 and a heat exchanger 11 are arranged in the. On the right side of this radiator 13 is a lubricating oil tank 24a.
The oil pipe 390 connected to the lubricating oil tank 24a penetrates the partition plate 39 to supply oil to the engine 5 via the electromagnetic valve 24b.

In the engine room 7, a cooling reserve tank 30a is arranged on the right side of the engine 5. The tip opening of the intake pipe 21a faces the ejection port 45a. As a result, the ventilation fan 47 receives a supercharging action. Further, since the fresh air is introduced by bypassing the piping chamber 10 accommodating the main accumulator 8 that stores the liquid-phase refrigerant,
The temperature of the fresh air is lowered, and also in this respect, the charging efficiency is increased and a large output can be obtained.

As described above, according to the first aspect of the present invention, the outdoor unit, which is the outdoor air conditioning unit 2, is divided into the engine room 7 for housing the engine 5 and the heat exchanger room 10 for housing the heat exchanger. By disposing the lubricating oil tank 24a containing the oil for lubricating the engine 5 in the heat exchanger chamber 10, the influence of the heat of the engine 5 is reduced, and the lubricating oil tank 24
By disposing a in the heat exchanger chamber 14 having a low temperature inside the outdoor unit, deterioration of oil can be prevented.

According to a second aspect of the present invention, the outdoor unit which is the outdoor air conditioning unit 2 is driven by the engine room 7 that houses the engine 5, the heat exchanger room 14 that houses the heat exchanger, and the engine 5. The lubricating oil tank 24a that stores the oil that lubricates the engine 5 is partitioned into the piping chamber 10 that houses the main accumulator 8 that is arranged in the middle of the refrigerant circuit that is circulated by the compressor 6. Alternatively, by arranging in the piping chamber 10, the influence of the heat of the engine 5 is reduced, and the lubricating oil tank 24a in the outdoor unit has a low temperature in the heat exchanger chamber 14 and / or the piping chamber 10.
The oil can be prevented from being deteriorated by arranging it at.

[0098]

As described above, according to the first aspect of the invention, since the lubricating oil tank is arranged in the heat exchanger chamber partitioned from the engine room, the influence of the heat of the engine can be reduced and the lubricating oil tank can be reduced. Is placed in the heat exchanger chamber having a low temperature in the outdoor unit, the deterioration of oil can be prevented, and the durability of the engine is improved.

According to a second aspect of the present invention, the lubricating oil tank accommodates an accumulator arranged in a heat exchanger chamber partitioned from the engine room or in the middle of a refrigerant circuit circulated by a compressor driven by the engine. Since it is located in the piping chamber, the influence of engine heat is reduced, and the oil deterioration is prevented by locating the lubricating oil tank in the heat exchanger room or the piping room where the temperature is low inside the outdoor unit. It is possible to improve the durability of the engine.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of an engine-driven air conditioner.

FIG. 2 is a front view of an outdoor air conditioning unit.

FIG. 3 is a right side view of the outdoor air conditioning unit.

FIG. 4 is a plan view of a floor surface of the outdoor heat exchanger chamber.

FIG. 5 is a plan view of a pad.

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

FIG. 7 is a sectional view of an electrical equipment box.

FIG. 8 is a layout view of a water inlet portion of engine cooling water.

FIG. 9 is a cross-sectional view of a water injection port.

FIG. 10 is a sectional view of an exhaust heat exchanger.

FIG. 11 is a front view of a lubricating oil supply device for an engine.

FIG. 12 is a cross-sectional view of the engine.

FIG. 13 is a sectional view of a cylinder head cover.

FIG. 14 is a schematic block diagram of a lubricating oil supply device for an engine.

FIG. 15 is a cross-sectional view showing a schematic configuration of an outer plate wall of the outdoor air conditioning unit.

FIG. 16 is a front view of an outdoor air conditioning unit.

FIG. 17 is a plan view of an outdoor air conditioning unit.

[Explanation of symbols]

 5 Engine 7 Engine Room 8 Main Accumulator (Waste Heat Recovery Device) 10 Piping Room 14 Heat Exchanger Room 24a Lubricating Oil Tank

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuaki Saito 2500 Shinkai, Iwata, Shizuoka Prefecture Yamaha Motor Co., Ltd.

Claims (2)

[Claims] 1. An outdoor unit, an engine room for accommodating an engine,
An engine-driven heat pump device, wherein a lubricating oil tank, which is partitioned into a heat exchanger chamber that accommodates a heat exchanger and that accommodates oil that lubricates an engine, is disposed in the heat exchanger chamber. 2. An outdoor unit, an engine room for accommodating an engine,
It is divided into a heat exchanger chamber containing a heat exchanger and a piping chamber containing an accumulator arranged in the middle of a refrigerant circuit circulated by a compressor driven by the engine, and contains oil for lubricating the engine. An engine-driven heat pump device, wherein a lubricating oil tank is arranged in the heat exchanger chamber or the pipe chamber.