JPH0875306A - Engine-driven heat pump apparatus - Google Patents

Abstract

PURPOSE: To obtain an engine-driven heat pump apparatus whose outdoor unit is compact while the capacity of an accumulator is ensured and pipe connection work is simple. CONSTITUTION: In an engine-driven heat pump apparatus, a heat exchange room is arranged at the upper part and a pipe room 10 and an engine room at the lower part. An engine 5 and a compressor 6 are contained in the engine room, and the pipe room 10 is arranged behind the engine room with a partition wall between them. An accumulator 8 and an oil separator 19a are laid parallel lengthwise in the pipe room 10 and the oil separator 19a has dimensions smaller than the accumulator 8. In addition, the rear sidewall of the pipe room 10 is removable. Assuming a virtual partition wall 650 that passes through the accumulator 8 and divides the pipe room 10 into two sections lengthwise, two external joint ends of a refrigerant pipeline and a joint part having an on-off valve are arrayed on the rear external wall side against the virtual partition wall 650, an the oil separator 19a on the engine room 7 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine drive type heat pump device in which a refrigerant compressor is driven by an engine, and an engine drive system in which devices are arranged in an outdoor unit of an air conditioning facility using a gas heat pump engine or the like. Type heat pump device.

[0002]

2. Description of the Related Art An engine driven heat pump device is applied as an air conditioner using a gas heat pump engine, and is disclosed in, for example, Japanese Patent Laid-Open No. 63-247562. In this air conditioner, the heat converter room Kr is arranged in the upper part of the outdoor unit, and the engine room Er is arranged in the lower part.

A refrigerant heat exchanger K, a radiator R, a four-way valve device V, a liquid receiver L and a dryer D are arranged in the heat exchanger chamber Kr, and a waste heat recovery unit U and exhaust gas heat are arranged in the engine chamber Er. Exchanger G, compressors C1, C2
Is arranged.

[0004]

By the way, the refrigerant passage between the refrigerant heat exchanger K or the other equipment in the heat exchanger chamber Kr and the equipment in the engine room Er is formed at a plurality of spaced locations. . Further, the cooling water passage between the radiator R in the heat exchanger chamber Kr and the device in the engine chamber Er is also arranged at a position separated from the refrigerant passage, so that it is troublesome to connect the refrigerant pipelines. There is.

Further, there is a demand for the outdoor unit to be thin in relation to the installation location, but as in the conventional case, the heat exchanger chamber Kr and the engine chamber Er are partitioned and the equipments are respectively arranged. However, it is difficult to reduce the size in the lateral direction and to make the device thin by mixing the equipment and the piping.

An accumulator as a waste heat recovery device for recovering waste heat is arranged in the engine compartment Er, and an exhaust gas heat exchanger G and compressors C1, C2 are arranged in the engine compartment Er. Therefore, it is difficult to secure a space for arranging the accumulator having a sufficient capacity to store the refrigerant.

Further, the refrigerant piping between the accumulator and the compressor in the engine room is effective in recovering waste heat when the length is as short as possible, and the electrical equipment box can be easily replaced when the oil separator fails. It would be convenient to be able to do this.

The present invention has been made in view of the above points, and the invention according to claim 1 makes the outdoor unit compact,
Moreover, it is an object of the present invention to provide an engine-driven heat pump device that can secure the capacity of the accumulator, shorten the refrigerant pipe, and easily connect the pipe from the outside. Another object of the present invention is to provide an engine-driven heat pump device capable of facilitating inspection of the electrical equipment box. It is another object of the present invention to provide an engine-driven heat pump device that can easily replace the oil separator when it fails.

[0009]

In order to solve the above-mentioned problems, an engine-driven heat pump device according to a first aspect of the present invention has a heat exchanger room at the upper part and a piping room and an engine room at the lower part, An engine and a compressor are housed in the engine chamber, the pipe chamber is arranged adjacent to the rear side of the engine chamber through a partition wall, the pipe chamber is formed long in the left-right direction, and an accumulator in the pipe chamber, The oil separators are juxtaposed in the longitudinal direction, the dimensions of the oil separators are made smaller than the dimensions of the accumulator, and the rear outer wall of the piping chamber is configured to be detachable, and the piping chamber is divided into two in the longitudinal direction through the accumulator. Assuming a virtual partition wall, the joint portion including two connection end portions for entering and exiting the refrigerant pipe and an on-off valve arranged at each of the connection end portions, Place the rear outer wall of the virtual partition wall as a boundary, it is characterized in that the oil separator is arranged on the engine compartment side partition wall of the virtual as a boundary.

The engine-driven heat pump device according to a second aspect of the present invention is characterized in that the electrical equipment box is arranged on the outer wall side of the virtual partition wall in the piping chamber.

An engine-driven heat pump device according to a third aspect of the present invention is characterized in that an electric equipment box can be attached and detached, and the oil separator is arranged between the electric equipment box and the engine room.

[0012]

According to the first aspect of the present invention, the heat exchanger chamber is arranged in the upper part, the piping chamber and the engine room are arranged in the lower part, the engine and the compressor are housed in the engine room, and the piping chamber is arranged on the rear side of the engine room. Since the piping chambers are arranged adjacent to each other via the partition wall and the piping chamber is formed to be long in the left-right direction, the size of the piping chamber in the lateral direction can be reduced, and the outdoor unit can be made compact.

Further, since the accumulator and the oil separator are arranged side by side in the longitudinal direction in the piping chamber and the size of the oil separator is made smaller than the size of the accumulator, the refrigerant can be sufficiently stored in the accumulator.

Further, when assuming a virtual partition wall that divides the piping chamber in two in the longitudinal direction by passing through the accumulator, it is arranged at two connection ends for connecting with the outside of the refrigerant pipe and at the connection end, respectively. Since the joint part consisting of the open / close valve is placed on the rear outer wall side with the virtual partition wall as a boundary, it becomes possible immediately by connecting the joint part of the refrigerant inlet / outlet pipe with the indoor unit by removing the outer wall. Further, the refrigerant pipe between the accumulator and the compressor in the engine room can be shortened.

According to the second aspect of the invention, since the electric equipment box is arranged on the outer wall side of the virtual partition wall in the piping chamber, the electric equipment box can be inspected by removing the outer wall.

According to the third aspect of the invention, since the oil separator is arranged between the electric equipment box and the engine room, the oil separator can be easily replaced because the outer wall can be removed to replace the oil separator when a failure occurs. Can be exchanged.

[0017]

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.

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 the exhaust heat exchanger, FIG. 11 is a plan view showing the engine room and the piping room, FIG. 12 is a rear view showing the engine room and the piping room, FIG. 13 is a sectional view of the main accumulator, and FIG.
Is a front view showing the cooling water circulation system, FIG. 15 is a right side view showing the cooling water circulation system, FIG. 16 is a plan view of the cooling water circulation system, FIG. 17 is a sectional view of the thermostat, and FIG.
FIG. 4 is a cross-sectional view showing a schematic configuration of an outer 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. 18.

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 fuel line 22 has a gas mixer 21b.
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.
The exhaust heat exchanger 23b and the exhaust silencer 23c are connected through the exhaust pipe 23a, and the exhaust pipe 23a is opened above the heat exchange chamber 14 via the mist separator 23e. The gas mixer 21b may be arranged outside the top wall of the heat exchanger chamber 14 as described later with reference to FIG.

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. 670 is a dryer, and 671 is a filter that bypasses the dryer 670.

Numerals 900 and 901 are capillary tubes, 2
Reference numerals 10 and 210 are each 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 portion of the accumulator increases, the opening / closing valve 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, and when the amount of lubricating oil separated by the oil separator 19a exceeds a predetermined value, the 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 is opened 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 always communicates with the cooling water jacket 28b, and the first circulation paths 29a1, 29a2, 29q, 2 when the engine is cold.
It is possible to release air in 9s. The cooling water reservoir tank 30a is also provided with a communication passage 30e between the water injection port 30d and the atmosphere at the upper part.

Further, the engine cooling water is supplied to 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.

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. 18, 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 sides of the casing 31 and the upper part of the rear side plate 37b have outside air introduction openings, 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.

When removing, 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 that forms the front side wall of the engine room 10. The drain port 43a opening at the lower end of the vertical gutter 43 is the 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 lateral 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 44 are partition walls between the engine room 7 and 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 jet outlets 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 100 of the refrigerant lines 100, 101
a, 101a 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.

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 side surfaces, 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 14, 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. Valve 62c
Allows the 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 62 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.

Even if water vapor in the circuit due to engine operation and the pressure valve 62 pass, the water vapor may move 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 may be 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 and 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, two refrigerant heat exchangers 1
Each of the pipes 29c, 29d for connecting one and one refrigerant heat exchanger 12 and the radiator 13 and each device in the pipe chamber 10
16b, 16c and 30c are right side plates 37 of the piping chamber 10.
On the d-side and in the central portion in the front-rear direction, it penetrates through one sealing pad 49 provided in a through-hole provided at the left end portion of the central partition plate 40. The conduit is sealed by a pad. Also,
The pipes connected to each of the heat exchangers 11 to 13 are arranged diagonally along the diagonal arrangement of the heat exchanger 12 and the radiator 13 on the lower side.

In the longitudinal direction of the outdoor unit, which is the outdoor air conditioning unit 2, the engine room 7 and the piping room 10 are arranged side by side.
A ventilation passage 46 is arranged in the lower part of the, and a ventilation fan 47 is arranged between the ventilation passage 46 and the piping chamber 10. The engine 5 and the compressor 6 arranged in the engine room 7 are arranged in the longitudinal direction, and the refrigerant pipelines 600, 60 connected to the compressor 6 are arranged.
1, 602 extend to the left above the engine 5 along the rear middle plate 44a, penetrate through the rear middle plate 44a, respectively, and the refrigerant pipeline 600 communicates with the oil separator 19a. It is connected to the sub accumulator 9. The refrigerant pipe lines 600 to 602 are covered with heat insulating materials 603 and 604 for preventing dew condensation.

A main accumulator 8, an oil separator 19a and a sub accumulator 9 are arranged in the longitudinal direction on the rear side of the piping chamber 10. Between the main accumulator 8 and the oil separator 19a, a four-way valve 15 is provided above the accumulator 8. Are arranged. The refrigerant pipe 16a is connected to one side of the four-way valve 15, and the refrigerant pipes 16b to 16b are connected to the other side.
16d is connected. The refrigerant conduit 16a extends laterally to the upper side of the oil separator 19a, bends, extends downward, and is connected to the oil separator 19a. The refrigerant pipe line 16b extends downward along the main accumulator 8, bends between the main accumulator 8 and the rear intermediate plate 44a and extends upward to penetrate through the sealing pad 49, and the refrigerant heat exchanger 11, 12 is connected. The refrigerant pipe line 16c extends downward from the heat exchangers 11 and 12, penetrates through the sealing pad 49, enters the main accumulator 8, and is provided with a heat exchange section 16e. Refrigerant line 16d
Extends laterally from the four-way valve 15 and then extends downward to reach the upper portion inside the main accumulator 8. In this way, the refrigerant pipe between the main accumulator 8 and the compressor 6 in the engine room 7 is shortened.

The sub accumulator 9 is communicated with the main accumulator 8 via the refrigerant pipe 202,
This refrigerant pipe line 202 meanders.

As described above, in the outdoor air conditioning unit 2, the outdoor heat exchanger chamber 14 is arranged in the upper part, the piping chamber 10 and the engine room 7 are arranged in the lower part, and the engine 5 and the compressor 6 are housed in the engine room 7. Then, the pipe room 10 is divided into the partition wall 207 on the rear side of the engine room 7.
Since the piping chambers 10 are arranged adjacent to each other via d and formed to be long in the left-right direction, the size of the piping chamber 10 in the lateral direction can be reduced, and the outdoor air conditioning unit 2 (outdoor unit) can be made compact.

In addition, in the piping chamber 10, FIG. 11 and FIG.
Since the main accumulator 8 and the oil separator 19a are arranged side by side in the longitudinal direction and the dimension of the oil separator 19a is made smaller than the dimension of the main accumulator 8 as shown in (4), the refrigerant can be sufficiently stored in the main accumulator 8.

Further, assuming a virtual partition wall 650 that divides the piping chamber 10 into two parts in the longitudinal direction through the main accumulator 8, as shown in FIG. 12 with the rear side plate 37b and the electrical equipment box 50 removed, Piping 100,1
Two joints 100a, 1 for entering and leaving 01
01a and the on-off valves 100b and 101 arranged at the connection ends of the joints 100a and 101a, respectively.
Since the joint part composed of b is arranged on the rear outer wall side of the rear side plate 37b with the virtual partition wall 650 as a boundary, connection at the joint part of the refrigerant inlet / outlet pipe with the outdoor air conditioning unit 2 (outdoor unit) Can be immediately realized by removing the outer wall forming the rear side plate 37b.

Further, since the electrical equipment box 50 is arranged on the outer wall side constituted by the rear side plate 37b of the virtual partition wall 650 in the piping chamber 10, it is necessary to inspect the electrical equipment box 50.
This can be easily performed by removing the outer wall of b.

Since the oil separator is arranged between the electrical equipment box 50 and the engine room, the oil separator 19
The replacement of a at the time of failure is easy because the electrical equipment box 50 can also be removed by removing the outer wall of the rear side plate 37b.

Further, by disposing the on / off valves 100b and 101b of the refrigerant circuit in the joint portion, when the refrigerant is filled,
It is possible to open the on-off valves 100b and 101b and inject the refrigerant from one joint while bleeding air from the other. After filling, after closing both the on-off valves 100b and 101b, the joints of the refrigerant inlet and outlet pipes with the outdoor air conditioning unit 2 (outdoor unit) are connected,
After the connection is completed, the refrigerant circuits of the outdoor air conditioning unit 2 (outdoor unit) and the indoor air conditioning unit 3 (indoor unit) can be connected through both the on-off valves 100b and 101b, and this connection work is also easy. it can.

Further, the additional filling operation when the escape of the refrigerant gas occurs can be easily carried out by removing the outer wall of the rear side plate 37b. Further, the electrical equipment box 50 has a box shape in which the outer wall side is open, and switch wiring terminals are arranged inside.

An oil supply tank 24a and a cooling water reserve tank 30a are arranged in a position facing the ventilation fan 47 in the piping chamber 10 to prevent temperature deterioration of the oil. The cooling water reserve tank 30a is located in the recess 24a1 on the front side of the oil supply tank 24a. In addition, the supply port 24 of the oil supply tank 24a
a2, a supply port 30a1 of the cooling water reserve tank 30a,
All of the supply ports 30a2 to the radiator 13 are arranged on the front side of the engine, that is, in front of the outdoor unit 2 in the front-rear direction, and the front plate 37a is removed, so that the engine 5 can be easily maintained and replenished.

In the engine room 7, an inspection board 100 used for maintenance and inspection of the outdoor air conditioning unit 2 is a front side plate 37.
It is arranged to face a 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 downstream side of the exhaust silencer 23c is connected to the engine room 7
Central partition plate 40 and outdoor heat exchanger chamber 1 that constitute the ceiling wall of
4 is connected to a mist separator 23e that penetrates the top plate 37e that constitutes the top wall and opens to the outside and separates and collects the condensed water mist in the exhaust gas. The intake pipe 23a1 is connected to the exhaust heat exchanger 23b on the upstream side of the exhaust silencer 23c.

The exhaust heat exchanger 23b is arranged on the front side of the engine 5, and the exhaust outlet 23b1 is arranged on the longitudinal compressor side of the exhaust heat exchanger 23b. A gas mixer 21b having a built-in throttle 5b is arranged beside the cylinder head 5a, and the gas mixer 21b and the intake silencer 21c are connected by an intake pipe 21a1. 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,
Further, the exhaust silencer 23c integrated with the oil separator 23d for separating the oil mist in the breather gas introduced from the inside of the cylinder head cover is arranged side by side, so that the engine room 7 can be made smaller. Further, the exhaust pipe 23a1 between the exhaust heat exchanger 23b and the exhaust silencer 23c can be shortened,
The workability of attaching and detaching the exhaust pipe 23a1 is improved.

When the exhaust gas flows through the exhaust pipes 23a, 23a1 and the exhaust silencer 23c, it is cooled and separated from the exhaust gas to produce 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 the cylinder head 5 through the breather passage 107.
It communicates with a.

An air cleaner 21c and an exhaust silencer 23c are provided in the space above the compressor 6 connected to the engine 5, and a mist separator 23e is provided outside the top plate 37e in the engine room 7 at positions other than above the engine 5. The neutralizer 104 is arranged below the compressor 6, and the positional relationship between them is such that the exhaust heat exchanger 23b is arranged at a position higher than the neutralizer 104, and the air cleaner 21c and the exhaust silencer 23c are arranged at higher positions. Since the mist separator 23e is arranged at a higher position, the height of the engine room 7 can be lowered. Further, the condensed water of the exhaust heat exchanger 23b and of the exhaust silencer 23c can be reliably guided to the neutralizer 104. Further, the condensed water in the mist separator 23e can be surely guided to the neutralizer 104.

The air cleaner 21c and the oil separator 23d are adjacent to each other in the vicinity of the intake port of the engine 5, and the conduit 108 for guiding the breather gas separated from the oil by 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
Flowing into the upper cooling water passage 215a, then flowing to the right through the upper cooling water passage 215a, and 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 and 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 in 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, and
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 composed of 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 upstream heat exchange section 210 and the downstream heat exchange section 211 exchange heat between the exhaust gas and the cooling water to effectively recover the heat of the exhaust gas. At the same time, its temperature and pressure are lowered to reduce exhaust noise.

As described above, the heat exchanger chamber 14 arranged in the upper part of the outdoor unit, the engine room 7 in which the engine 5 and the compressor 6 driven by the engine 5 are arranged in front of the lower part of the outdoor unit, and the rear part. The heat exchangers 11 and 12 which are partitioned in the piping chamber 10 in which the refrigerant device R is disposed in the longitudinal direction in the heat exchanger chamber 14, and the refrigerant at one end of the heat exchangers 11 and 12 in the longitudinal direction. Of the refrigerant pipe connecting the inside of the pipe chamber 10 and the inside of the heat exchanger chamber 14 with the inlet and outlet of the partition wall penetrating portion A.
By arranging the four-way valve 15 between the partition wall penetrating portion B of the refrigerant pipe that connects between the inside of the piping chamber 10 and the inside of the engine room 7,
To simplify the piping between the equipment in the heat exchanger chamber 14 arranged in the upper part of the outdoor unit 7 and the equipment in the engine room 7 and the piping room 10 arranged in the lower part of the heat exchanger chamber 14. You can

Further, one end in the longitudinal direction of the radiator 13 arranged in the longitudinal direction in the heat exchange chamber 14, that is, the end in the same direction of the end where the refrigerant inlet and outlet of the heat exchangers 11 and 12 are arranged. The inlet and outlet of the cooling water to the radiator 13, and the cooling water pipes 29c, 2c as described above.
9d is made to penetrate the sealing pad 49 of the partition wall penetrating portion A. This makes it possible to simplify the cooling water pipes as well.

Further, the partition wall penetrating portion B provided on the rear middle plate 44a of the refrigerant pipe connecting the inside of the pipe chamber 10 through which the refrigerant pipe toward the compressor 6 passes and the inside of the engine room 7 is connected to the pipe chamber 10
It is arranged on the opposite side of one end in the longitudinal direction where the partition wall penetrating part A of the refrigerant pipe connecting the inside and the heat exchanger chamber 14 is arranged, and between these partition wall penetrating parts A and B. A sub accumulator 9, an oil separator 19a, and a main accumulator 8 are arranged.

In the engine room 7, the engine 5 is arranged closer to the partition wall penetrating portion B in the longitudinal direction, the compressor 6 is arranged closer to the partition wall penetrating portion A side in the longitudinal direction, and compression is performed from the partition wall penetrating portion B. The pipe up to the machine 6 is formed by a flexible pipe, and the engine 5 and the compressor 6 are integrally mounted and supported, and even if the compressor 6 is largely displaced, the flexible pipe is not affected.

Further, the main accumulator 8 and the engine 5 are arranged opposite to each other, so that there is an advantage that the weight is balanced and no offset load is added to the foundation of the installation portion.

Next, a concrete embodiment of the cooling water circulation system S will be described with reference to FIGS. 14 to 17.

The engine 5 is arranged in the engine room 7, the exhaust heat exchanger 23b is arranged in front of the engine 5, and the thermostat 28c is arranged above the engine 5.
The valve 28c5 is closed at a predetermined temperature, for example, 60 ° C or lower, and the valve 28c5 is closed.
c6 is open. As shown in FIG. 14, the thermostat 28c has a valve body 28c1 having a valve seat 28c2 communicating with the pipe 29b and a valve seat 28c communicating with the pipe 29q.
3 are formed. A wax portion 28c4 is arranged inside the valve body 28c1, and the valve 2 is provided on one side of the wax portion 28c4.
A valve 28c6 is provided on the other side of 8c5.

When the temperature of the cooling water around the wax portion 28c4 is a predetermined temperature, for example, 60 ° or less, the valve 28c5 moves to the valve seat 2
8c2 is closed, while the valve 28c6 fully opens the valve seat 28c3. When the cooling water temperature exceeds 60 °, the valve seat 28c2
Starts to open while the valve seat 28c3 begins to close. As the temperature rises, the opening degree of the valve seat 28c2 increases, while the opening degree of the valve seat 28c3 decreases, and when the water temperature exceeds 75 °, the valve seat 28c2 is fully opened and the valve seat 28c3 is fully closed.

An air vent hole 28c8 opens on the upper side of the valve casing 28c7, and an air vent pipe D allows the water injection port 30
connected to b.

Further, the left side plate 37c below the engine 5
A first cooling water pump 28a for warming up the engine is arranged in the vicinity of the introduction passage opening portion forming the ventilation passage in the engine room 7, and is cooled by the introduction air. Further, the first cooling water pump 28a may be arranged in the piping chamber 10, and in this case as well, it is cooled in the piping chamber 10 forming the ventilation passage.

The main accumulator 8 is arranged on the right rear side in the piping chamber 10, the second cooling water pump 28e is arranged on the lower right front side, and the linear three-way valve 28d is arranged above the main accumulator 8. . The second cooling water pump 28e is also cooled in the piping chamber 10 that constitutes the ventilation passage. In this way, by arranging the second cooling water pump 28e for circulating the hot water circulating through the exhaust heat exchanger 23b and the accumulator 8 in the ventilated piping chamber 10 and further in the vicinity of the ventilation fan 47, Piping room 10
A main accumulator 8 that stores a liquid-phase refrigerant is disposed therein, and the cooling is performed more effectively.

A radiator 13 is arranged on the front side in the outdoor heat exchanger chamber 14. The operation of the linear three-way valve 28d allows the pipe 29b to communicate with either the pipe 29c or the pipe 29f1.

The pipe 29a1 connects the cooling water jacket 28b of the engine 5 and the first cooling water pump 28a, and is arranged along the left side plate 37c. The pipe 29e1 communicates the lower side of the exhaust heat exchanger 23b with the second cooling water pump 28e, passes under the engine 5 and enters the ventilation passage 46,
Further, it is arranged in the ventilation passage 46. The pipe 29s communicates with the first cooling water pump 28a and the thermostat 28c via the pipe 29q and rises from below the front side plate 37a along the right side in the engine room 7, while the pipe 29q passes above the compressor 6. Are arranged. The pipe 29e2 communicates with the right side of the exhaust heat exchanger 23b and the pipe 29s, and is arranged above the compressor 6.

The pipe 29b connects the thermostat 28c and the linear three-way valve 28d to each other, and connects the compressor 6 to the compressor 6 from above.
Is disposed above the main accumulator 8 through the right middle plate 44b. Pipe 29p is second
Of the cooling water pump 28e, one of which communicates with the radiator 13 through the pipe 29c, the other of which communicates with the linear three-way valve 28d through the pipe 29f1, and the pipe 29p includes the right side plate 37d.
The pipe 29c communicates with the lower portion of the radiator 13, and the pipe 29f1 is arranged above the main accumulator 8 from the linear three-way valve 28d. The pipe 29d extends downward from the upper part of the radiator 13 and
It merges with f2 and communicates with the second cooling water pump 28e.

The pipe 30c connected to the radiator 13 extends downward from above the radiator 13 and is connected to the cooling water reserve tank 30a. Cooling water reserve tank 3
0a is arranged on the right front side of the piping chamber 10. Piping 2
9r connects the pipe 29s and the pipe 29b, and is arranged above the compressor 6.

The radiator 13 is arranged in the lateral direction in the outdoor heat exchanger chamber 14, and the cooling water inlet 13a and the cooling water outlet 13b are arranged at one end of the radiator 13. A linear three-way valve 28d, a main accumulator 8 and a second cooling water pump 28e are provided at one end of the outdoor unit in which the cooling water inlet 13a and the cooling water outlet 13b are arranged in the left-right direction and below the outdoor heat exchanger chamber 14. The cooling water reserve tank 30a is arranged, and the pipe length between them can be shortened by arranging them in close proximity to each other.

In the outdoor heat exchanger chamber 14, not only the radiator 13 but also the refrigerant outdoor heat exchangers 11 and 12 are arranged in the left-right direction, and the refrigerant inlet and refrigerant outlets of the refrigerant outdoor heat exchangers 11 and 12 are placed in the radiator 13. It is located at the same right end as the cooling water inlet and cooling water outlet.

The pipes passing through the central partition plate 40 which divides the outdoor heat exchanger chamber 14 and the lower pipe chamber 10 were adjacent to each other at their ends. That is, an elastic pad (rubber) integrated pad 49 is arranged in the through hole of the central partition plate 40 to close the through hole, and at the same time, the pad of the refrigerant is connected to the return pipe, the return pipe and the cooling water. At least four tube through holes 49a are provided for the tube and the return tube. Since the pipelines are concentrated, it is easy to connect the pipelines.

The sealing pad 49 has notches 49a for connecting each conduit hole and the end portion 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 a sealed state with the right side plate 37d,
The piping chamber 10 and the heat exchange chamber 14 are partitioned.

The water inlet 30b of the radiator 13 and the cooling reserve tank 30a having the water inlet are arranged at the same end, and the front side plate 37a of the outdoor unit can be attached and detached, so that the radiator 13 and the cooling reserve can be removed. It is easy to supply water to the tank 30a. Further, the oil supply tank 24a to the engine 5 is also at the same end, and the inlet 24a2 of the oil supply tank 24a is located above the water inlet 30a1 of the cooling water reserve tank 30a, so that water and oil supply work can be performed easily. . In addition, when the water is poured into the inlet 24a2 of the oil supply tank 24a while the inlet 24a2 is opened, even if water spills, it will not mix with the oil.

As described above, the outdoor unit which is the outdoor air conditioning unit 2 includes the engine room 7 for accommodating the engine 5, the outdoor heat exchanger chamber 14 for accommodating the radiator 13, and the main accumulator 8 for exchanging heat with the refrigerant. Arranging three adjacent rooms of the piping room 10 accommodating the waste heat recovery device,
After the cooling water circulation path from the engine 5 to the radiator 13 and the main accumulator (waste heat recovery device) 8 is arranged, after the engine 5 in the engine room 7 reaches the piping room 10, that is, the piping 29b is the thermostat 28c. From the engine room 7 to the pipe room 10 through the portion of the right middle plate 44b at a substantially intermediate height, and is connected to the linear three-way valve 28d. The valve is branched by the linear three-way valve 28d, one of which is returned to the inside of the pipe chamber 10 through the radiator 13 in the outdoor heat exchanger chamber 14 by the pipes 29c and 29d, and the other is pipe 29
After f1 and 29f2 reach the waste heat recovery device which is the main accumulator 8 in the pipe room 10, they merge with each other in the pipe room 10 and then the engine 5 in the engine room 7 through the pipes 29p and 29e1. The cooling water circulation system S is designed to be returned to the cooling system. By efficiently branching and joining the pipes, cooling that penetrates the partition walls that partition the engine room 7, the piping room 10 and the outdoor heat exchanger room 14 is performed. The number of water tubes can be minimized.

Further, the cooling water circulation system S in the piping chamber 7
The cooling water pipes in the piping chamber 10
As shown in FIGS. 11 and 13, the indoor units 9d, 29f1 and 29f2 are arranged only at one end (right end) in the longitudinal direction when viewed from above, and the pipe length in the pipe chamber 10 is It can be shortened, the cost can be reduced, and the cooling water pipe can be made compact.

Further, the pipe 29c in the radiator 13
The positions of the inlet 13a connected to each other, the linear three-way valve 28d that is the branch portion, and the inlet 8a that is connected to the pipe 29f1 in the waste heat recovery device that is the main accumulator 8 in the height direction are The radiator 1 is arranged so that the inlet 13a, the linear three-way valve 28d, and the inlet 8a are arranged in this order.
3, the linear three-way valve 28d and the main accumulator (waste heat recovery device) 8 of the branch portion are arranged, and the outlet 13b to which the pipe 29d of the radiator 13 is connected,
The positions in the mutual height direction between the confluent portion 29h of the pipe 29d and the pipe 29f2 and the outlet 8b of the main accumulator (waste heat recovery device) 8 are such that the outlet 13b, the confluent portion 29h, and the outlet 8b are in this order. The pipes 29c, 29d, 29f forming the cooling water pipe between the radiator 13 and the main accumulator (waste heat recovery device) 8.
1,29f2 of air can be released.

In the middle of the pipe line 29 connecting the linear three-way valve from the thermostat 28c, there is a portion that descends downward in the downstream, but after the engine is stopped, the valve 28c5 opens the valve seat 29c2 due to residual heat, The air passes through the conduit 29 and the valve seat 28c2, passes through the air vent hole 28c8, and the air vent pipe A
It can be drained to the water inlet 30b through. In addition, the material of the water jacket 28b conduits 29a2 and 29a2 can be removed by removing the air vent pipe D from the thermostat 29c while the engine is stopped, even while the engine is operating.

Next, another embodiment of the cooling water circulation system will be described in detail with reference to FIGS. 19 to 30. FIG.
9 to 26 are views showing a cooling water circulation system, FIGS. 27 to 29 are views showing valve characteristics, and FIG. 30 is a sectional view of a cylinder.

FIG. 19 is a schematic diagram of the cooling water circulation system described with reference to FIGS. 1 to 17. The cooling water circulation system S includes an engine circulation path S1, a heat radiation circulation path S2, a first connection path S3, and a second connection. A road S4, a first connecting point P1, a second connecting point P2, a third connecting point P3 and a fourth connecting point P4,
The on-off valve (thermostat) 28c is configured as shown in FIG. 17 and operates as shown in the valve characteristic diagram of FIG.

The cooling water circulation system S of FIG.
Same as the above, but on-off valve (thermostat) 10
Different from the thermostat 28c of FIG. 17, 00 is for making the flow of the one-way path ONO, FF.
In the connecting path S3, the wax portion arranged on the first connecting point P1 side senses the temperature, and if the temperature is higher than a predetermined value, the valve portion is opened to allow the flow.

The valve characteristic for opening and closing by sensing the temperature of the thermostat 1000 has hysteresis as shown in FIG.

Further, the thermostat 28 shown in FIG.
As described above, c splits the flow in two directions, and based on the temperature on the upstream side of the branching portion, only flows in one direction at a temperature of 60 ° C. or less, and branches in both directions at 60 ° C. to 70 ° C. and flows. At 75 ° C or higher, flow only to the other. The characteristics of this valve are shown in FIG. As can be seen, there is hysteresis in the valve switching opening / closing characteristics.

The cooling water circulation system S of FIG. 21 is shown in FIG.
The third connection point P3 is arranged on the upstream side of the second cooling water pump 28c in the heat radiation circulation path S2.

The cooling water circulation system S shown in FIG.
The on-off valve (thermostat) 28c shown in is used, and the third connection point P3 is arranged on the upstream side of the second cooling water pump 28c in the heat radiation circulation path S2, as in the connection method of FIG.

In the cooling water circulation system S of FIG. 23, in the cooling water passage downstream of the first cooling water pump 28c among the two cooling water passages connecting the first cooling water pump 28a and the cooling water jacket 28b in parallel. The first connection point P1 is located at. In the embodiment of FIGS. 20 to 22, the first
In the cooling water passage on the upstream side of the cooling water pump 28c.
The connection point P1 is arranged.

A temperature sensor 251 is provided in the engine circulation path except for the first connection point and the second connection point, and the opening / closing valves 261 and 262 are controlled by the controller 252 based on the temperature of the cooling water.
Is controlled by the combination of the on-off valves 261 and 262,
As shown in FIG. 29, it functions similarly to a three-way valve. However,
Regarding the temperature, the three-way valve shown in FIG. 29 has a valve rotation angle of 0 degrees at 60 ° C. or lower, and a valve rotation angle of 90 degrees at 75 ° C. or higher. The valve rotation angle increases from 0 degree. When the temperature reaches a predetermined temperature or higher, the cooling water is cooled by the cooling water jacket 28b, the first cooling water pump 28a, the first connecting path S3, the heat radiating heat converter 250, the second cooling water pump 28e, and the exhaust gas heat exchange. Vessel 23b, second connecting path S4 and cooling water jacket 28b
It becomes a cycle of returning to. That is, since the temperature sensor 251 is arranged in the engine circulation path S1 except between the first connection point P1 and the second connection point P2, the temperature of the circulating cooling water can be sensed not only during warming up. is there.

In the cooling water circulation system S of FIG. 24, a temperature sensor 253 is provided between the first connection point P1 and the second connection point P2, and based on the temperature information of the cooling water and the information other than the hot water temperature signal, for example, based on the load. The controller 252 controls the flow control valve 263. If the flow rate between the first connection point P1 and the second connection point P2 decreases or stops after warming up, the temperature sensor 253 may not be able to accurately sense the cooling water temperature. However, once the engine is warmed up, considering that the temperature does not drop during operation, it may be possible to detect the completion of warming up, and the engine circulation between the first connection point P1 and the second connection point P2. There is no particular problem even if it is arranged on the road S1. The on-off valve (solenoid valve) 26
3 is arranged in the second connecting path S4.

The cooling water circulation system S of FIG. 25 is branched from the middle portion of the cooling water jacket 28b so as to be divided into the first connecting path S.
It is 3. Further, the thermostat 28c is arranged at the second connection point P2. First when the temperature exceeds a certain temperature
The cooling water flows in the cooling water jacket 28b between the connection point P1 and the second connection point P2. The engine cooling capacity may be insufficient, but the valve 28c of the thermostat 28c
This can be improved by increasing the full valve closing temperature of No. 6.

The cooling water circulation system S of FIG. 26 is provided with a temperature sensor 257 on the upstream side of the first cooling water pump 28a, and based on the cooling water temperature information, a control signal by the control unit 252 and, for example, a signal other than the hot water temperature signal. The linear three-way valve 265 is controlled based on the information based on the load, and functions as shown in FIG.

As described above, in the cooling water circulation system S according to the first aspect of the invention, the cooling water jacket 28 of the engine 5 is used.
b, the first cooling water pump 28a, and the cooling water jacket 2
The parallel cooling water passage connecting 8b and the first cooling water pump 28a forms an engine circulation passage S1 through which the cooling water circulates, and the exhaust heat exchanger 23b, the heat radiating heat exchanger (radiator) 13, and the second heat exchanger A cooling water pump 28e and a cooling water passage connecting these to each other form a heat radiation circulation passage S2, which is located at an arbitrary position in the engine circulation passage S1, in the middle of the cooling water jacket 28b or in the two cooling water passages. A first connecting path S3 that connects the first connecting point P1 and the heat-dissipating circulation path S2, a second connecting point P2 that is a part of the engine circulating path S1 that is downstream of the first connecting point P1, and a heat-dissipating circulation path. S
Of the two, the third connecting point P3, which is the connecting point of the first connecting path S3
The second connecting path S4 that connects the more upstream locations is arranged,
An opening / closing valve is arranged in at least one of the first connecting passage S3 and the second connecting passage S4, and the cooling water temperature between the opening / closing valve and the engine circulation passage S1 and anywhere in the engine circulation passage S1. Based on the above, when the temperature of the cooling water becomes large, the opening / closing valve opening is made large.

By the open / close valve, the cooling water flows through the engine circulation path S1 during the cooling operation. When the temperature reaches a predetermined temperature, the on-off valve operates and switches to perform warm-up operation. During warm-up operation, cooling water flows through the heat radiation circulation path S2.

As described above, when the on-off valve is arranged and the temperature of the cooling water becomes high on the basis of the temperature of the cooling water between the on-off valve and the engine circulation path S1 and anywhere in the engine circulation path S1. The opening / closing valve opening can be made large, and the exhaust gas can be cooled by the exhaust heat exchanger 23b even during warm-up.

Next, the cooling water circulation system S includes the cooling water jacket 23b of the engine 5 and the first cooling water pump 28.
e, the cooling water jacket 28b, and the first cooling water pump 2
The parallel cooling water passage connecting 8e forms an engine circulation passage S1 through which the cooling water circulates, and the exhaust heat exchanger 23b, the heat radiating heat exchanger (radiator) 13, the second cooling water pump 28e, and A heat-dissipating circulation path S2 is formed by the cooling water paths that connect to each other, and the heat-dissipating circulation path S2 is connected to the first connection point P1 at any position in the engine circulation path s1, in the middle of the cooling water jacket 28b or in the two cooling water paths. A first connecting passage S3 connecting the circulation passage S2 and an engine circulation passage S2
Among them, the second connection point P2 which is a location downstream of the first connection point P1 and the location of the heat dissipation circulation path S2 which is upstream of a third connection point P3 which is a connection point of the first connection path S3 are connected. Second
The connecting path S4 is arranged, and the first connecting point P1 and the second connecting point P are arranged.
A flow direction switching valve is arranged in at least one of the two, and a flow direction switching valve is arranged in the first connecting point P1 when the temperature of the cooling water becomes high based on the temperature of the cooling water in the engine circulation path S1. When doing, the engine circulation path S1 and the third connection path S
When the flow direction switching valve is set so as to reduce the flow path resistance between the flow direction and the flow direction switching valve 5 and the flow direction switching valve is arranged at the second connecting contact P2, the second connecting path S3 and the second connecting path S3 are used. The flow direction switching valve is set so as to reduce the flow resistance of the passage reaching the engine circulation path S1, and the exhaust gas is cooled by the exhaust heat exchanger even during warm-up. You can

Further, in the cooling water circulation system S, if at least the first cooling water pump 28a of the first cooling water pump 28a and the second cooling water pump 28e is an electric pump, it does not depend on the engine speed. The flow rate can be secured.

The first cooling water pump 28a and the second cooling water pump 28a
If the second cooling water pump 28e is continuously operated for a predetermined time after the engine is stopped by using at least the second cooling water pump 28e as an electric pump, the exhaust heat exchange after the engine is stopped The exhaust gas can be cooled by the device 23b and the residual heat of the exhaust pipe and the like can be radiated after the engine is stopped. In addition, air can be removed by circulating the cooling water after the engine is stopped.

The heat radiating heat exchanger may be a radiator or a refrigerant heat exchanger. That is, in the case of the refrigerant heat exchanger, the refrigerant heat exchanger as the heat radiating heat exchanger, that is, the main accumulator 8 is maintained even when the on-off valve is closed during warming up.
Exhaust heat can be recovered by circulating cooling water (warm water) through the heat exchange section 29g. In addition, in the embodiment of FIGS. 1 to 17, the radiator 13 and the heat exchange portion 29g are the three-way valve 28d.
Therefore, either one or both of them can be used as a heat radiating heat exchanger.

Further, not only the engine speed but also the rotation speed of the first or second cooling water pump is increased according to the load on the indoor unit side, and a large amount of cooling water is circulated in the refrigerant heat exchanger. You can

When the on-off valve is closed, the proportional relationship between the engine speed and the speeds of the first cooling water pump 28a and the second feed water pump 28e is stopped, and the first cooling water pump 28a and the first cooling water pump 28a are stopped. By reducing the relative value of the number of revolutions of the second supply water pump 28e to the number of engine revolutions, water leakage can be prevented.

Further, even during warm-up, the exhaust gas can be cooled by the exhaust heat exchanger 23b. In addition,
As shown in the engine cross-sectional view of FIG. 30, a cylinder 2 made of aluminum die casting adopting a wet liner for the engine 5 is used.
70 can be used. A cast iron sleeve 271 is fitted in the cylinder 270, and a water jacket 272 is formed between the cylinder 270 and the cast iron sleeve 271.
The lower side of the water jacket 272 is sealed with an O-ring 273, the upper side is engaged with the stepped portion 271a of the cast iron sleeve 271 with the stepped portion 270a of the cylinder 270, and the engaging portion is sealed with a sealant 274.

As described above, by combining the cast iron sleeve 271 and the water jacket 272, the problem that the core cannot be used due to the aluminum die casting is solved by making the core unnecessary. Further, the difference in the coefficient of thermal expansion due to the temperature difference is easily absorbed by the difference in the coefficient of thermal expansion of the material. Cast iron sleeve 27
By changing the inner diameter of No. 1, it is possible to easily change the exhaust amount for all cylinders 270.

Further, the first and second cooling water pumps may be arranged on the coaxial pump shaft, and the pump shaft may be driven by the crank shaft.

A linear three-way valve that receives an electric signal and controls switching may be used as the flow direction switching valve.

A three-way valve for switching the flow direction based on the expansion and contraction of the temperature sensing wax, that is, the thermostat 28c may be used.

As the flow direction switching valve, an opening / closing valve may be arranged in each of the two branched passages.

In addition, in this cooling water circulation system S, when the on-off valve is arranged in the first connecting passage S3, the first connecting contact P1
Or the on-off valve, or the on-off valve is controlled based on the cooling water temperature at any place between the cooling water jacket entrance in the engine circulation path S1 and the second connection point P2, or the on-off valve is set to the second
When arranged in the connecting passage S4, if the opening / closing valve is controlled based on the cooling water temperature between the inlet of the cooling water jacket 28b in the engine circulation passage S1 and the second connecting contact P2, the opening / closing valve is opened and closed. There is little change in the cooling water temperature detected for control.

In the cooling water circulation system S, the first
If the flow direction switching valve is controlled based on the cooling water temperature between the connection point P1 and the upstream side inlet of the cooling water jacket 28b, for control when the flow direction of the flow direction switching valve switches. There is little change in the cooling water temperature detected in.

Next, a concrete example of the engine 5 will be described with reference to FIGS. 31 is a sectional view of the engine, FIG. 32 is a side view of the engine, FIG. 33 is a sectional view of the cylinder head cover, FIG. 34 is a front view of a lubricating oil supply device for the engine, and FIG. 35 is a schematic configuration of the lubricating oil supply device for the engine. Block diagram, FIG. 36 is a circuit diagram of the inspection device, FIG.
FIG. 4 is a front view of a control panel of the inspection device.

In the engine 5, a cylinder block 301 is fixed to an oil pan 300 which also serves as a crankcase, and the cylinder block 301 is inclined forward. A cylinder head 302 is placed on the cylinder block 301,
A cylinder head cover 303 is attached to the cylinder head 302.
Is attached.

Reference numeral 401 is a main journal bearing of the crankshaft 331, 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 a breather gas containing oil is sent from the connecting pipe 310 to the oil separator 23d.

Mounting brackets 32 are provided on the front and rear of 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 to the front side,
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 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.

The cylinder axis L is inclined such that the upper side of the cylinder axis L of the engine 5 approaches the side wall formed by the front side plate 37a, and the cylinder head cover 3 of the engine 5 is further inclined.
A space for inserting an oil pitcher (oiler) at the time of refueling by arranging an oil injection port 303b on the upper surface of 03 and a cap 305 that is detachably fitted to the oil injection port 303b and tilting the engine toward the side wall. Can be easily secured, and by reducing the space for lubrication, the outdoor unit can be a compact outdoor unit with a small overall height.

Further, the side wall facing the outside of the engine room can be attached and detached, and the oil injection port is arranged on the upper surface of the cylinder head cover of the engine inclined to the side wall side, and the cap is removed after removing the side wall. It can be easily removed and the oil injection work is easy.

In addition, the combustion chambers 33 of the left and right cylinders, respectively.
6, a spark plug 400 is provided on the cylinder head 302 so as to face it, and a high tension coil 401 and an ignition coil 402 are connected to the spark plug 400. Spark plug 400 and high tension coil 401
Is disposed rearward of the oil injection port 303b disposed in the front upper portion of the upper surface of the cylinder head cover 303 that tilts forward, and even if oil spills during lubrication,
Since the high tension cord 401 does not leak to the side, the high tension cord 401 is prevented from being burned and causing an engine failure. Further, since the ignition plug 400 and the ignition coil 402 are arranged on the same side behind the oil injection port 303b of the cylinder head cover 303, the high tension coil 401 can be shortened, and voltage loss can be reduced and cost can be reduced.

Further, the spark plug 400 and the ignition coil 4
02 is arranged on the side of the intake passage 337 to suppress the temperature rise and improve the durability.

The intake valve 339 and the exhaust valve 340 are operated by the valve mechanism 341, and the camshaft 3 of the valve mechanism 341 operates.
42 rotates in conjunction with the crankshaft 335, and the camshaft 34
The second cam 342a moves the push rod 343 up and down. The push rod 343 is arranged in a rod hole 420 formed so as to communicate with the cylinder block 301 and the cylinder head 302, and the rocker arm 344 moves up and down by the operation of the push rod 343 to operate the intake valve 339 and the exhaust valve 340. An exhaust heat exchanger 23b is attached to the front side of the cylinder block 301 and has an exhaust passage 338.
Exhaust gas is discharged to the exhaust heat exchanger 23b, and the intake pipe 23a is connected to the intake passage 337. The exhaust heat exchanger 23b is attached to the cylinder head 30 by the mounting bolt 345.
2, the cylinder block 301 by the mounting stay 346
Attached to. The engine 5 is inclined to the front side, and by removing the front side plate 37a in front of the engine, removing the mounting bolt 345 from the front side, and removing it from the mounting stay 346, it is possible to easily attach and detach from the front side, and maintenance inspection work can be performed. It's easy.

In this way, the engine 5 is tilted to the front side,
The exhaust port 405 of the exhaust passage 338 is arranged below the tilt axis according to the cylinder, the exhaust heat exchanger 23b is directly connected below the exhaust port 405, and the front side plate 37a is detachable. The breakage can be easily attached and detached, and the maintainability of the engine 5 is improved.

Oil is stored in the oil pan 300 of the engine 5, and the lower limit oil level sensor 421 for detecting the lower limit of the oil level is provided at the bottom of the oil pan 300.
Is provided. Further, an oil level gauge 351 is provided in the oil pan 300 from the front side of the engine 5 with an inspection lid 422.
It is attached so that it can be inserted. Inspection lid 422 from the front side
By removing, the inside of the engine 5 is inspected through the inspection window 423.

The oil level gauge 351 is provided with a lower limit mark 351a and an upper limit mark 351b so that the lower limit oil level and the upper limit oil level can be detected. An oil pump 352 is attached to the cylinder block 301 on the front side 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, the oil lubrication path will be described. In FIG. 31, the oil lubrication path is indicated by a solid arrow.

By driving the oil pump 352, 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.

The 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 35 to the oil pan 350 is provided.
The oil pipes 392, which are elastic rubber pipes, are connected between the pipes that connect the 2a, 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 is small. Since a large stress is unlikely to occur at the base of the oil pipe, the durability of the oil pipe 392 is improved.

Further, 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 if the oil decreases, 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.

As described above, before and after the four sides of the outdoor unit,
It has a side wall structure in which the left and right side surfaces are covered with front, rear, left, and right side plates 37a to 37d. Of these side walls, the front side plate 37a that constitutes the front and rear side walls and the rear side plate 37b can be attached and detached. The inspection device T is arranged facing the side wall of the.

As shown in FIGS. 36 and 37, the inspection device T includes a power outlet 701, a power switch 702, and a regular inspection switch 703 on the control panel 700.
Also, a checker connection terminal 704 is provided. When the plug 699 is connected to the external power supply and the power switch 702 is turned on, the power is supplied via the breaker 705 to the power circuit 706.
, A predetermined drive voltage is applied to the operation control device 707, the operation control unit 707 becomes operable, and the power supply switch of the remote controller for the indoor unit 3 is turned on to start the operation of the outdoor unit 2. The operation control device 707 is the engine control device 70.
8 and a system control device 709. The engine control device 708 includes a CPU 710, an ignition device 711, an ignition plug 400, a drive IC 713, and an actuator group 7.
It is composed of 14. This actuator group 714
For example, the clutch 6a, the gas mixer 21b, the flow rate control valve 22a, the solenoid valve 22c, the first cooling water pump 2
8a, a second cooling water pump 28e, a ventilation fan 47, and the like.

The system controller 709 has a CPU 71.
5, RAM716, ROM717, non-volatile memory 71
8, a drive IC 719 and an actuator group 720. CPU 715 of system controller 709
And information is exchanged with the CPU 710 of the engine control device 708. The actuator group 720 includes, for example, a four-way valve 15, a solenoid valve 19c, a linear three-way valve 28d, an outdoor heat exchange fan 44, and the like. Also, the CPU 715 of the system control device 709 is configured to communicate
Information is exchanged with the C721 through communication, and the communication IC 721 is connected to the checker connection terminal 704, the indoor unit connection table 722, and the outdoor board 723.

Therefore, by connecting the personal computer checker 724 to the checker terminal 704, the operation record recorded in the non-volatile memory 718 can be read. As the operation record, there are, for example, a cumulative operation time, a cumulative operation number of each actuator, a cumulative operation time for each engine speed range, an approximate oil consumption amount calculated from data, and the like.

The inspector can additionally inject oil from the oil injecting cap 305 of the cylinder head cover 303 based on, for example, the estimated oil consumption amount.
In addition, the inspector can know whether or not there is an abnormal rotation range of the engine, such as abnormality of the ataturator, necessity of replacement of the oil filter, and the like.

Further, the inspector is required to check the periodic inspection switch 703.
By pressing, you can clear the accumulated operating time data for each engine speed range. Further, the inspector can connect to the 200V AC power source by using the outlet 701 during the inspection.

During the inspection, the front plate 37a is removed, and the ignition plug 400 is immediately inspected based on the inspection data, the oil filter 354 or 370 is replaced, and the oil tank 24a.
The oil supply from the oil injection port 24a2, the inspection of the solenoid valve 24b, the water injection into the cooling water reservoir tank 30a, and the like can be performed simultaneously with the inspection.

The periodic inspection switch 703 clears the data in the non-volatile memory 718 for notifying the lubrication timing based on the operation record by, for example, pressing after the oil tank 24a is lubricated, and the operation record after the lubrication is performed. Based on this, it becomes possible to inform the next lubrication timing accurately.

That is, if the front side plate 37a is removed, the oil inlet 24a2 and the regular inspection switch 703 can be touched, and the maintainability can be improved.

As described above, by removing the front side plate 37a or the rear side plate 37b among the four side walls of the outdoor unit, the inspection device T is used to face either the front side or the rear side by facing the removable side wall. From the standpoint of maintenance, it is possible to monitor the test run status during maintenance, improving maintainability. Also,
Side-by-side installation is possible at the time of collective installation, so the installation space can be set small.

Next, the intake system and the exhaust system of the engine will be described with reference to FIGS. 38 to 46. 38 is a front view showing an intake system and an exhaust system of the engine, FIG. 39 is a side view showing an intake system and an exhaust system of the engine, FIG. 40 is a sectional view of an air cleaner and a gas mixer, and FIG. 41 is a front view of an exhaust silencer. 42 is a sectional view taken along the line AA of FIG. 41, FIG.
3 is a plan view of the outdoor air conditioning unit, FIG. 44 is a plan view when a plurality of outdoor air conditioning units are installed, and FIGS.
FIG. 6 is a front view showing another embodiment of the outdoor air conditioning unit.

Cylinder head cover 303 of engine 5
Is a predetermined angle θ with respect to the horizontal plane, as shown in FIG.
The upper part 303a is provided with an oil injection port 303b on the front side, and a cap 305 is attached via a packing 304 for sealing the oil injection port 303b. The cap 305 faces the front side, can be easily attached and detached from the front side, and oil refilling work is easy. A rib 303c extending downward from the rear ceiling wall is formed on the cylinder head cover 303.
The plate 306 is attached by a mounting screw 307 so as to face c, thereby forming an oil separation chamber 308. The passage 3 that meanders vertically in the oil separation chamber 308
09 is formed, and the oil is separated by the meandering passage 309 and returned to the inside of the cylinder head through oil return holes 306a and 306b formed at the rising portion of the plate 306. Further, a connection pipe 310 is provided above the cylinder head cover 303, and air containing oil is supplied from the connection pipe 310 to the oil separation chamber 23.
sent to c3.

An air cleaner 21c, an exhaust silencer 23c and an oil separator 23d are arranged side by side above the compressor 6.

The air cleaner 21c is constructed as shown in FIG. Partition wall 21 in air cleaner 21c
A cleaner chamber 21c9 which is divided into two chambers by c1 and accommodates the expansion chambers 21c2 and 21c3 functioning as an intake silencer and the air cleaner element 21c8 is integrally provided in the air cleaner 21c.
An inlet 21c10 is formed on the boundary wall between the expansion chamber 21c2 and the expansion chamber 21c2, and the outlet 21c11 after filtration formed in the center is the second.
To the expansion chamber 21c3. The air introduced from the intake pipe 21a is supplied to the intake inlet 21c4 of the air cleaner 21c.
Is introduced into the first expansion chamber 21c2 from the
The cleaner chamber 21c9 enters from the inlet 21c10 of the cleaner chamber 21c9 from c2. At this time, the fresh air is the guide blade 21c
12, the flow is bent in the direction along the outer periphery of the air cleaner element 21c8,
Only part of c8 is not filtered. Fresh air filtered around the entire circumference of the air cleaner element 21c8 enters the second expansion chamber 21c3 from the outlet 21c11 and is connected from the intake outlet 21c5 to the gas mixer 21b connected to the intake port of the engine 5 via the intake pipe 21a1. There is. The gas mixer 21b houses a solenoid-operated throttle valve. The breather gas separated by the oil separator 23d from the gas inlet 21c6 is supplied to the second expansion chamber 21c3 of the air cleaner 21c by the pipe 10.
It is supplied via 8. Further, a drain hole 21c7 for discharging rainwater entering from the intake system is formed in the inlet chamber 21c2 of the air cleaner 21c. Air cleaner 21c
Of the intake pipe 21a connected to the upstream side of the above, 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 is opened to the outside. .

The lid 21c13 of the cleaner chamber 21c9 can be attached to and detached from the main body 21c14 of the air cleaner 21c, and when the front side plate 37a is removed, the air cleaner element 21c8 can be easily replaced from the front.

The exhaust pipe 23a connected to the upstream side of the exhaust silencer 23c has a central partition plate 40 which constitutes the ceiling wall of the engine room 7 and a ceiling plate 37 which constitutes the ceiling wall of the outdoor heat exchanger chamber 14.
It penetrates through e and is connected to the mist separator 23e attached to the outside of the top plate 37e. Exhaust silencer 23
c and the exhaust heat exchanger 23b are connected by an exhaust pipe 32a1.

The exhaust silencer 23c is shown in FIGS.
It is configured as shown in FIG. Exhaust gas is exhaust pipe 23
Exhaust inlet 23 of exhaust silencer 23c connected to a1
From c1 to the lower first expansion chamber 23c2, this exhaust gas enters from the communication passage 23c5 to the upper second expansion chamber 23c6 and from the communication passage 23c7 to the third expansion chamber 23c8,
Further, the fourth expansion chamber 23c on the lower side again from the communication passage 23c9.
10, the communication passage 23c11 to the fifth expansion chamber 23c1
2. The sound is discharged from the communication passage 23c13, the sixth expansion chamber 23c14, the exhaust outlet 23c15, and the exhaust pipe 23a, and is silenced by passing through each chamber.

Of the upper casing 23c16, the middle plate 23c17, and the lower casing 23c18 forming the exhaust expansion chambers of the exhaust silencer 23c, the lower casing 23c1.
8 forms an oil separation chamber 23c3 that constitutes the oil separator 23d on the lower front side.

As shown in FIG. 33, in the engine 5, the breather gas leaking from the combustion chamber to the crank chamber around the piston enters the cam chamber through the communication passage, and enters the oil separation chamber 3 provided in the cylinder head cover 303.
After some oil was removed at 08, the breather outlet 31
Breather inlet 23 from 0 via breather pipe 107
The breather gas from which oil is separated from the oil separation chamber 23c3 from c20 is sent from the breather outlet 23c21 to the air cleaner 21c. The separated oil is discharged as a drain from the breather inlet 23c20.

The oil drain returns to the oil pan of the engine 5 via the breather pipe 107 and the oil drain pipe 106.

The nonwoven fabric in the oil separation chamber 23c3 is for adsorbing or adhering the oil mist in the breather gas. The first expansion chamber 23c2 and the oil separation chamber 23c3 are in contact with each other through the lower casing 23c18, which is a common wall, and the heat of the exhaust gas is absorbed by the oil separation chamber 23c.
Since the oil adhered to the non-woven fabric has a reduced viscosity, the oil easily drops downward, flows through the bottom wall inclined downward toward the front, and forms a wall surface flow from the breather inlet 23c20 and flows down the breather pipe 107. .

The drain outlet 23c22 cools in each exhaust expansion chamber and the water vapor in the exhaust gas condenses into drain water, which serves as a drain passage (not shown) provided in each communication passage or a partition wall of each exhaust expansion chamber. The drain water is collected and discharged to the neutralizer 104.

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 incorporating the throttle 5b is provided beside the cylinder head 5a. The gas mixer 21b and the intake silencer 21c are installed in the intake pipe 21.
It was linked at a1. 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 23 between the exhaust heat exchanger 23b and the exhaust silencer 23c.
Since a1 can be shortened, the workability of attaching and detaching the exhaust pipe 23a1 is improved.

The lid 2 in front of the oil separation chamber 23c3
3c23 can be attached to and detached from the lower casing 23c16, and when the front side plate 37a is removed, the non-woven fabric can be easily inspected and replaced at the same time as other inspection work.

When the exhaust gas flows through the exhaust pipes 23a, 23a1 and the exhaust silencer 23c, it is cooled and separated from the exhaust gas to produce drain water having an acidic content. Also in the mist separator 23e and the exhaust heat exchanger 23b, drain water separated from the exhaust gas and having an acidic content is generated. These drain waters are guided to the neutralizer 104 via pipes 651, 652 and 103, respectively, and the drain water is neutralized by the neutralizer 104 and drained through the pipe 105.

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 in the engine room 7 at a position other than the position 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 exhaust silencer 23
c, the condensed water in the mist separator 23e can be reliably guided to the neutralizer 104.

The air cleaner 21c and the oil separator 23d are adjacent to each other in the vicinity of the intake port of the engine 5, and the oil separation chamber 23c of the oil separator 23d is adjacent to the air cleaner 21c.
Blow-by gas after oil separation in 3 is air cleaner 21
The conduit 108 leading to c can be shortened. In addition, the intake pipe 21a between the air cleaner 21c and the intake port of the engine 5
1 can be shortened.

Next, the exhaust heat exchanger 23b will be described. As described above, it is constructed as shown in FIG.

The upstream heat exchange section 21 of the exhaust heat exchanger 23b
0 is the upper expansion chamber 21 of the exhaust passage of the upstream heat exchange section 210.
An upper cooling water passage 215a is formed around 2a, 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, cooling water is guided to the lower cooling water passage 215b from the downstream heat exchange section 211, and the upper cooling water passage 215b is supplied from the lower cooling water passage 215b. The cooling water is discharged from a cooling water outlet 215c formed in the upper portion of the casing 207 through the cooling water passage 215a, and the cooling water is supplied to the cooling water passage of the engine 5.

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 and high-pressure exhaust gas produced 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 composed of 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 the 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 by 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.

Further, the heat exchanger chamber 1 arranged above the engine room 7 with the partition wall constituted by the central partition plate 40 as a boundary.
4, the ventilation fan 44 of the heat exchanger chamber 14 at the upper part of the heat exchanger chamber 14, the heat exchanger 11 at the front and rear of the heat exchanger chamber 14,
12 or a radiator 13 is arranged so as to pass through the partition wall from inside the engine room 7, pass through an intermediate space between the front and rear heat exchangers inside the heat exchanger chamber 14, and pass through the ceiling of the heat exchanger chamber 14 to the outside. Has an intake passage formed by an intake pipe 21a and an exhaust passage formed by an exhaust pipe 23a.

The exhaust passage outlet 23a2, the intake passage inlet 21
Since a2 penetrates the top plate 37e and opens to the outside of the outdoor unit 2 and does not open to the periphery of the outdoor unit 2, it is possible to arrange those that are easily affected by heat and obstacles to the flow of intake air. It becomes compact.

Further, it is possible to introduce cool air to the heat exchangers 11 on both sides by the ventilation fan 44 on the ceiling, and the exhaust pipe 2
The exhaust passage itself composed of 3a is also cooled by cold air, and the outside air warmed by this heat exchange is
It is discharged by the ventilation fan 44 on the ceiling without affecting the heat converter 11.

Further, the fresh air in the intake passage constituted by the intake pipe 21a may have heat transfer through the wall of the intake passage, but by forming it by a plastic pipe or a rubber pipe having a low heat conductivity, the heat influence is reduced. Can be made smaller.

The exhaust passage outlet 23a2 and the intake passage inlet 21a2 are arranged on both sides of the ventilation fan 44 so that the exhaust gas discharged from the exhaust passage outlet 23a2 flows toward the intake passage inlet 21a2. Is pushed out by the ventilation fan 44, and the intake passage inlet 21a2
To be reached.

Further, since the intake passage and the intake passage in the heat exchanger chamber 14 are also separated from each other, the influence of thermal radiation can be reduced, so that the engine performance does not deteriorate.

Further, as shown in FIGS. 42 and 43,
The ventilation fan 44 is sandwiched at a diagonal position of the rectangular outdoor unit 2 when viewed from above, and the exhaust passage outlet 2 is provided on both sides of the ventilation fan 44.
3a2 and the intake passage inlet 21a2 are arranged. Therefore, as shown in FIG. 43, when the same outdoor unit 2 is arranged adjacently, the exhaust passage outlet 23a2 of one outdoor unit 2 is arranged.
Therefore, the intake passage inlets 21a2 of the other outdoor unit 2 are not adjacent to each other, and the engine performance does not deteriorate.

When the outdoor air conditioning units 2 are arranged in this way, the front side plate 37a and the rear side plate 37b of each outdoor air conditioning unit 2 are lined up on the same side, so that inspection and maintenance of equipment in the engine room 7 and piping The equipment in the room 10 can be efficiently inspected and maintained for a plurality of outdoor units 2 at the same time.

Further, in the engine room 7, the air cleaner 21c and the exhaust silencer 23c are arranged in parallel above the compressor 6, and the distance from the exhaust passage penetrating portion of the ceiling of the heat exchanger chamber 14 is set to be smaller than that of the air cleaner 21c. Exhaust silencer 2
3c was placed closer. And compressor 6
A neutralizer 104 is arranged below the mist separator 23.
e, the exhaust silencer 23c, and the neutralizer 104 are connected by drain water passages 651 and 652, respectively.

Therefore, the exhaust passage in the heat exchanger chamber 14 is shortened, and the influence of heat can be reduced. Further, the mist separator 23e, the exhaust silencer 23c, and the neutralizer 104 can be adjacent to each other in a plane arrangement viewed from above, the drain water passage 651 can be shortened, and the acid drain water can be neutralized early without accumulating. .

FIG. 45 shows another embodiment of the engine-driven heat pump device. In this embodiment, the members designated by the same reference numerals have the same structure, and the description thereof will be omitted. In this embodiment, the intake passage inlet 21a2 of the intake passage formed by the intake pipe 21a is arranged so as to penetrate the wall of the exchanger chamber and open outside the heat exchanger chamber 14.

In this way, the engine room 7 for accommodating the engine 5 is arranged in the lower part of the outdoor unit, and the heat exchanger room 14 is arranged in the upper part,
An intake pipe 21a forming an intake passage to the engine 5 is arranged so as to penetrate through a central partition plate 40 forming a partition wall that divides the engine room 7 and the heat exchanger chamber 14 from each other.
a2 is arranged opposite to the hole of the heat exchanger chamber wall, or the intake passage is further arranged so as to penetrate through the exchanger chamber wall, and the intake passage inlet 21a2 is opened to the outside of the heat exchanger chamber 14. The fresh air sucked from 21a2 can be cooled without being affected by the heat exchanger, the charging efficiency can be improved, and the engine performance can be secured.

FIG. 46 shows still another embodiment of the engine-driven heat pump device. In this embodiment, the members designated by the same reference numerals have the same structure, and the description thereof will be omitted.
In this embodiment, the intake passage inlet 21a2 of the intake passage constituted by the intake pipe 21a is arranged so as to penetrate the partition wall and open to the piping chamber 10.

Thus, the outdoor unit is provided with at least the engine room 7 for accommodating the engine 5, the main accumulator 8 for accumulating the liquid-phase refrigerant, and the piping chamber 10 having the communication port 500 with the outside air. Then, the intake passage constituted by the intake pipe 21 of the engine 5 is arranged so as to pass through the partition wall 501 that divides the engine room 7 and the piping chamber 10 from the engine 5, and the intake passage inlet 21a2 is arranged in the piping chamber 10. Therefore, the fresh air sucked from the intake passage inlet 21a2 can be made into the cool air that is not affected by the heat exchanger, so that the charging efficiency is improved and the engine performance can be secured.

As shown in FIGS. 47 and 48, a transmission box 50 and a terminal chamber 699 are provided on the rear side of the outdoor unit so as to face the rear side plate 37b. FIG. 47 is a schematic cross-sectional plan view of the engine room and the piping room, and FIG. 48 is a view showing a connecting portion between the outdoor unit and the outside.

A breaker 95 is provided on the surface of the transmission box 50.
0, a power line terminal block 951 and a communication line terminal block 952 are provided, and a power cord 953 is connected to the power line terminal block 951.

Inside the terminal chamber 699, a refrigerant pipe 800,
Each of the joints 800a, 801a of 801 and 802a of the fuel line 22 are attached, and the fuel line 22 is provided with two solenoid valves 22c and a zero governor (pressure reducing valve) 22b.
The fuel line 22 penetrates the rear intermediate plate 44a, enters the engine room 7, and is connected to the flow control valve 22a provided in the gas mixer 21b.

As described above, the inside of the outdoor unit 7 includes the engine room 7 for accommodating the engine 5, the heat exchanger room 14 for accommodating the heat exchangers 11 and 12, and the main accumulator 8 in the refrigerant circuit.
And a refrigerant inlet / outlet end A to and from the outdoor unit, which is partitioned into a piping chamber 10 for accommodating the inside of the piping chamber 10 or outside the vicinity thereof (that is, each joint may be lowered to a position between the floor and the ground).
A fuel gas intake end B of the engine is arranged, and a fuel pipe from the fuel gas intake end B to the engine 5 in the engine room 7 through a partition wall that partitions the engine room 7 and the piping chamber 10. By arranging the passage 22, by taking out the refrigerant pipe and the fuel pipe that are piped from the outdoor unit to the outside from the same location, the pipe arrangement can be simplified and the space required for the pipe can be made compact. .

A pressure reducing diaphragm (not shown) is built in the zero governor 22b, and an atmospheric pressure introducing pipe 698 for guiding the atmosphere to one atmospheric pressure chamber of the diaphragm is also arranged so as to pass through the terminal chamber 699. The upper portion of the terminal chamber 699 is opened toward the piping chamber 10 and the lower portion is opened toward the ground, which serves as an indoor unit internal / external communication passage for each piping and power cord. Further, the terminal chamber 699 serves as an introduction path for ventilation air.

The power cord 953 is also arranged so as to pass near the refrigerant inlet / outlet end portion A and the fuel gas intake end portion B adjacent to the arrangement portion. In addition, since the engine room 7 and the piping room 10 are partitioned, the heat influence of the engine 5 is affected by the refrigerant piping 800, 8
01 can be prevented. Therefore, the piping from the main accumulator 8 to the compressor 6 in the engine room 7 is covered with a heat insulating material (not shown).

Further, since the volume of the engine room 7 is reduced by partitioning and the internal temperature easily rises, the ventilation inlet 46a in which the ventilation fan 47 is arranged and the ventilation outlet to the heat exchanger room 14 are arranged. are doing.

Further, the engine room 7 is arranged in the front part of the outdoor unit, and the piping chamber 10 is arranged in the rear part, and the front side wall can be detached and the rear side wall can also be detached.

[0230] Then, the engine 5 can be inspected from the front with the front side wall removed. Further, it is possible to inject oil, inspect the control panel 100, inject cooling water, replace the oil filter, replace the connecting rod large end bearing from the inspection window, and so on.

On the other hand, when the rear side wall is removed, the refrigerant pipes 800 and 801 are inspected and the zero governor (pressure reducing valve) 22 is attached.
It is possible to inspect b, inspect electrical components, inspect and desorb the refrigerant inlet / outlet end A and the fuel gas inlet end B.

[0232] Further, the engine room 7 is likely to reach a high temperature, the fuel gas is heated and the pressure rises, which may cause leakage of the pipeline, especially immediately after the engine is stopped in summer. However, since the pressure reducing valve (zero governor) 22b is arranged in the piping chamber 10, the fuel gas after being depressurized is guided into the engine room 7 where the temperature becomes high. Therefore, even if the engine room 7 is heated and the pressure rises, the absolute value of the pressure is low, and the occurrence of leakage is prevented. When arranging a plurality of outdoor units, the engine rooms 7 of a plurality of units can be inspected from the same side by aligning the front surfaces. Further, the arrangement locations of the cold soot inlet / outlet end A and the fuel gas intake end B are aligned on the rear surface, and the refrigerant pipe to the indoor unit, the fuel gas external pipe, and the power supply wiring can be compactly arranged outside the rear face. it can.

FIG. 49 shows another embodiment of the indoor air conditioning unit of the engine-driven heat pump device. In this embodiment, the members denoted by the same reference numerals as those in the embodiments of FIGS. In this embodiment, a floor 700 is provided below the indoor air conditioning unit 2, and a heat exchange chamber 14, an engine room 7, and a piping room 1 are provided in the center.
A partition wall 701 between 0 and 0 is provided.

Further, a partition wall 702 between the engine room 7 and the piping room 10 is provided between the bottom plate 700 and the partition wall 701. A terminal chamber 705 is arranged in the heat exchange chamber 14, and a zero governor (pressure reducing valve) 22 is provided via a fuel supply pipe 22.
b is connected, and the zero governor (pressure reducing valve) 22b is installed in the heat exchange chamber 14. The fuel supply pipe 22 connected to the zero governor (pressure reducing valve) 22b penetrates the partition wall 701,
It communicates with a gas mixer 21b provided in the engine 5.

As another embodiment, for example, the fuel supply pipe 22 'passes from the engine room 7 through the floor 700, once outside the outdoor air conditioning unit 2, and then connected to the zero governor 22b' in the piping room 10. It is also possible to pass through the partition wall 701 and reach the terminal chamber 705.

Next, another embodiment of the outdoor air conditioning unit will be described.
This will be described with reference to FIGS. 50 and 51. 50 is a front view of the outdoor air conditioning unit, and FIG. 51 is a plan view of the outdoor air conditioning unit.

In this embodiment, the same members as those in FIGS. 1 to 18 are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, the outdoor harmony unit 2 has the partition plate 39 so that the heat exchanger chamber 14 is provided above. 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 through the piping chamber 10 that houses 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.

In this way, the outdoor unit, which is the outdoor air conditioning unit 2, is partitioned into the engine room 7 for accommodating the engine 5 and the heat exchanger room 10 for accommodating the heat exchanger, and the oil for lubricating the engine 5 is provided. By disposing the lubricating oil tank 24a to be housed in the heat exchanger chamber 10, the influence of the heat of the engine 5 is reduced, and the lubricating oil tank 24a is installed in the heat exchanger chamber 14 having a low temperature in the outdoor unit. By arranging it, the deterioration of oil can be prevented.

Further, the outdoor unit which is the outdoor air conditioning unit 2 is circulated by the engine room 7 which houses the engine 5, the heat exchanger room 14 which houses the heat exchanger, and the compressor 6 driven by the engine 5. The main accumulator 8 placed in the middle of the refrigerant circuit
Lubricating oil tank 2 containing oil for lubricating the engine 5
By arranging 4a in the heat exchanger chamber 14 and / or the piping chamber 10, the influence of the heat of the engine 5 is reduced, and further, the lubricating oil tank 24a in the outdoor unit has a low temperature in the heat exchanger chamber 14 or Also, the oil can be prevented from being deteriorated by disposing it in the piping chamber 10.

[0241]

As described above, according to the first aspect of the invention, the heat exchanger chamber is arranged in the upper part, the piping chamber and the engine room are arranged in the lower part, the engine and the compressor are housed in the engine room, and the piping is arranged. Since the chambers are arranged adjacent to each other on the rear side of the engine room via the partition wall and the piping chamber is formed to be long in the left-right direction, the size of the piping chamber in the lateral direction can be reduced and the outdoor unit can be made compact.

Further, since the accumulator and the oil separator are arranged side by side in the longitudinal direction in the pipe chamber and the dimension of the oil separator is smaller than the dimension of the accumulator, the refrigerant can be sufficiently stored in the accumulator.

Further, assuming a virtual partition wall that divides the piping chamber into two parts in the longitudinal direction through the accumulator, two connection end portions for connecting with the outside of the refrigerant pipe and one connection end portion are respectively arranged. Since the joint part consisting of the open / close valve is arranged on the rear outer wall side with the virtual partition wall as a boundary, it becomes possible immediately by disconnecting the joint part of the refrigerant inlet / outlet pipe with the indoor unit from the outer wall. Further, the refrigerant pipe between the accumulator and the compressor in the engine room can be shortened.

According to the second aspect of the present invention, since the electric equipment box is arranged on the outer wall side of the virtual partition wall in the piping chamber, the electric equipment box can be inspected by removing the outer wall.

According to the third aspect of the invention, since the oil separator is arranged between the electrical equipment box and the engine room, the oil separator can be easily replaced when the breakdown of the oil separator is achieved by removing the outer wall. it can.

[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 plan view showing an engine room and a piping room.

FIG. 12 is a rear view showing an engine room and a piping room.

FIG. 13 is a sectional view of a main accumulator.

FIG. 14 is a front view showing a cooling water circulation system.

FIG. 15 is a right side view showing the cooling water circulation system.

FIG. 16 is a plan view of a cooling water circulation system.

FIG. 17 is a sectional view of a thermostat.

FIG. 18 is a cross-sectional view showing a schematic configuration of an outer plate wall of the outdoor air conditioning unit.

FIG. 19 is a diagram showing a cooling water circulation system.

FIG. 20 is a diagram showing a cooling water circulation system.

FIG. 21 is a diagram showing a cooling water circulation system.

FIG. 22 is a diagram showing a cooling water circulation system.

FIG. 23 is a diagram showing a cooling water circulation system.

FIG. 24 is a diagram showing a cooling water circulation system.

FIG. 25 is a diagram showing a cooling water circulation system.

FIG. 26 is a diagram showing a cooling water circulation system.

FIG. 27 is a diagram showing valve characteristics.

FIG. 28 is a diagram showing valve characteristics.

FIG. 29 is a diagram showing valve characteristics.

FIG. 30 is a sectional view of a cylinder.

FIG. 31 is a cross-sectional view of the engine.

FIG. 32 is a side view of the engine.

FIG. 33 is a sectional view of a cylinder head cover.

FIG. 34 is a front view of a lubricating oil supply device for an engine.

FIG. 35 is a schematic block diagram of a lubricating oil supply device for an engine.

FIG. 36 is a circuit diagram of the inspection device.

FIG. 37 is a front view of a control panel of the inspection device.

FIG. 38 is a cross-sectional view showing a schematic configuration of an outer plate wall of the outdoor air conditioning unit.

FIG. 39 is a side view showing an intake system and an exhaust system of the engine.

FIG. 40 is a cross-sectional view of an air cleaner and a gas mixer.

FIG. 41 is a front view of the exhaust silencer.

42 is a cross-sectional view taken along the line AA of FIG. 41.

FIG. 43 is a plan view of the outdoor air conditioning unit.

FIG. 44 is a plan view showing a case where a plurality of outdoor air conditioning units are installed.

FIG. 45 is a front view showing another embodiment of the outdoor air conditioning unit.

FIG. 46 is a front view showing another embodiment of the outdoor air conditioning unit.

[Fig. 47] Fig. 47 is a schematic cross-sectional plan view of an engine room and a piping room.

FIG. 48 is a diagram showing a connecting portion between the outdoor unit and the outside.

FIG. 49 is a front view of another embodiment of the outdoor air conditioning unit.

FIG. 50 is a front view of the outdoor air conditioning unit.

FIG. 51 is a plan view of the outdoor air conditioning unit.

[Explanation of symbols]

 2 Outdoor air conditioning unit 5 Engine 6 Compressor 7 Engine room 8 Main accumulator 10 Piping room 14 Heat exchanger room 19a Oil separator 650 Virtual partition wall

Claims (3)

[Claims] 1. A heat exchanger chamber is arranged in an upper part, a piping chamber and an engine room are arranged in a lower part, an engine and a compressor are housed in the engine room, and the piping chamber is a partition wall behind the engine room. Are arranged adjacent to each other, the pipe chamber is formed to be long in the left-right direction, the accumulator and the oil separator are juxtaposed in the pipe chamber in the longitudinal direction, and the size of the oil separator is made smaller than the size of the accumulator, and further the pipe chamber When a rear outer wall is configured to be detachable and a virtual partition wall that passes through the accumulator and bisects the pipe chamber in the longitudinal direction is assumed, two connection end portions for entering and exiting the refrigerant pipe and the A joint portion including an on-off valve arranged at each of the connection end portions is arranged on the rear outer wall side with the virtual partition wall as a boundary, and the oil separator with the virtual partition wall as a boundary. Engine driving type heat pump apparatus being characterized in that disposed on the chamber side. 2. The engine-driven heat pump device according to claim 1, wherein an electric equipment box is arranged on the outer wall side of the virtual partition wall in the piping chamber. 3. The engine-driven heat pump device according to claim 2, wherein an electric equipment box is made detachable, and the oil separator is arranged between the electric equipment box and the engine room.