JPH0814697A - Engine-driven type heat pump device - Google Patents

Abstract

PURPOSE:To provide an engine-driven type heat pump device which is constituted to simplify arrangement of a piping and form a space required for piping in a compact manner. CONSTITUTION:An engine-driven type heat pump device has an indoor machine which is partitioned into an engine room to contain an engine, a heat-exchanger chamber to contain a heat-exchanger, and a piping chamber to contain the accumulator 8 especially of devices in a refrigerant circuit. A refrigerant output input end part A of an indoor machine and a fuel gas intake end part B of the engine are arranged in the piping chamber or at the outside of the vicinity of the piping chamber in such a state to make access to each other and a fuel line 22 running from the fuel gas intake end part B to the engine in the engine room through a partition wall, by which the engine room and the piping chamber are partitioned from each other, is arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine-driven heat pump device in which a compressor is driven by an engine, and more particularly to an engine-driven heat pump device having a connecting portion between an outdoor unit and the outside.

[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, there are some which divide the outdoor unit into an engine room for accommodating an engine, a heat exchanger room for accommodating a heat exchanger, and a piping room for accumulator in a refrigerant circuit.

[0003]

By the way, the connecting end portion of the refrigerant pipe for output to the indoor unit and the connecting end portion of the refrigerant pipe for input from the indoor unit are collectively arranged in the pipe room or adjacent portions. However, the connection end to the fuel gas source is located in the engine room or adjacent to it. However, if the refrigerant pipeline and the fuel pipeline that are piped from the outdoor unit to the outside are taken out from different locations, the handling around the outdoor unit becomes complicated and a large piping space is required.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an engine-driven heat pump device which simplifies the handling of the piping and makes the space required for the piping compact.

Another object of the present invention is to make a piping space around the outdoor unit compact, and to provide an engine-driven heat pump device in which leakage does not easily occur even if the fuel piping is heated.

[0006]

In order to solve the above-mentioned problems, an engine-driven heat pump device according to a first aspect of the present invention is configured so that an indoor unit has an engine room for accommodating an engine and a heat exchanger for accommodating a heat exchanger. The chamber, in the refrigerant circuit is divided into a pipe chamber for accommodating an accumulator, and an inlet / outlet end portion of the refrigerant with respect to the indoor unit and an outside end portion of the refrigerant inside the pipe chamber or the vicinity of the pipe chamber, and a fuel gas intake end portion of the engine. The fuel pipes are arranged close to each other, and a fuel pipe line from the fuel gas intake end to the engine in the engine room is arranged to penetrate through a partition wall that partitions the engine room and the piping room. .

The engine-driven heat pump device according to a second aspect of the present invention is characterized in that a pressure reducing valve is arranged in the middle of the fuel pipe line and the pressure reducing valve is arranged in the pipe chamber.

According to a second aspect of the present invention, there is provided an engine-driven heat pump apparatus in which an indoor unit has an engine room for accommodating an engine, a heat exchanger room for accommodating a heat exchanger, and a piping room for accommodating a refrigerant circuit. In the space excluding the engine room, the refrigerant inlet / outlet end portion of the indoor unit and the fuel gas intake end portion of the engine are arranged close to each other, and from the fuel gas intake end portion. The pressure reducing valve provided in the middle of the fuel line to the engine is arranged in a space other than the engine room.

[0009]

According to the first and third aspects of the invention, the refrigerant inlet / outlet end of the indoor unit and the fuel gas inlet end of the engine are arranged inside or outside the vicinity of the pipe, and the refrigerant inlet / outlet end is arranged. And a fuel gas intake end portion, and by arranging a fuel pipe line from the fuel gas intake end portion through the partition wall that divides the engine room and the piping chamber to the engine in the engine room, the outdoor unit By taking out the refrigerant pipe and the fuel pipe that are piped from the outside to the outside, it is possible to simplify the handling of the pipe and achieve a compact space required for the pipe.

According to the second aspect of the invention, since the pressure reducing valve is arranged in the middle of the fuel pipe and the pressure reducing valve is arranged in the piping chamber, the fuel gas after being depressurized is introduced into the engine chamber where the temperature becomes high. Even if the pressure rises due to heating in the engine room, the absolute value of the pressure is low, and leakage is prevented.

[0011]

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 13 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 cross-sectional view of the exhaust heat exchanger, FIG. 11 is a view showing one exhaust heat exchanger for convenience, FIG. 12 is a view showing a connecting portion between the outdoor unit and the outside, and FIG. 13 is an outdoor air conditioning unit. It is a front view of other examples.

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

A water-cooled gas fuel engine is used as the engine 5, and an intake pipe 21a is provided at an intake port of the engine 5.
A gas mixer 21b and an air cleaner 21c are connected to each other via an intake pipe 21a, and the intake pipe 21a penetrates the ceiling wall of the engine room 7 and the ceiling wall of the outdoor heat exchanger chamber to open to the outside. The intake pipe 21a may be opened in the engine room 7 as described later.

The gas mixer 21b is connected to a gas fuel source by a fuel line 22, and the gas mixer 21 is connected to the fuel line 22.
A flow rate control valve 22a, a zero governor (pressure reducing valve) 22b, and two solenoid valves 22c integrated with b are provided. Further, the exhaust port of the engine 5 has an exhaust pipe 23a.
Exhaust heat exchanger 23b, exhaust silencer 23c,
The mist separator 23e is connected to the exhaust pipe 23
The opening a is located above the heat exchange chamber 14.

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

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

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

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

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

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

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

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. 2 to 12.

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. 11, 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 pipe room 10,
It is composed of a central partition plate 40 and engine room side partition plates 41a and 41b that form the ceiling of the engine room 7, and pipe room side partition plates 42a and 42b that form the ceiling of the pipe room 10. Engine room side partition plates 41a, 41b and piping room side partition plate 42
The a and 42b are detachable upward.

At the time of removal, the front and rear side plates 37a, 37
b is also removed, the engine room 7 is open at the ceiling side, the front side and both corners, and the piping room 10 is opened at the ceiling side, the rear side and both corners, and the equipment in each room is opened. Easy maintenance work.

Further, the central partition plate 40 and the partition wall 4 on the piping chamber side
At the boundary between 2a and 42b and on the outer upper side (upper side on the piping chamber 10 side) of the rear middle plate 44a which constitutes the front side wall of the engine room 7, a gutter 48 (drainage passage) is provided at the center of these and a partition on the piping chamber side. It is arranged so that it can be disassembled from the plates 40, 42a, 42b, that is, it can be replaced with a new one. The gutter 48 is a groove-like member extending in the longitudinal direction of the outdoor air-conditioning unit 2 (horizontal direction in FIG. 1), that is, in the direction of the arrangement surface of the heat exchanger, and is inclined so that it becomes lower toward the left side. The right end portion 48b located at the highest position of the gutter 48 can be exposed to the outside by removing the right side plate 37d or by providing an opening (cleaning hole).

The central partition plate 40 may cover the gutter 48 in a V-shape, and a plurality of rainwater dropping holes may be provided in the V-shaped bottom above the gutter 48.

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

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

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

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

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

There is no floor plate 33 below the terminal chamber 699, and there is no ceiling. The terminal chamber 699 is a communication passage that connects the piping chamber 10 and the outside of the casing 31. Also,
The terminal chamber 699 is opened rearward with the rear side plate 37b removed. Each joint 800 of the refrigerant pipes 800 and 801
a, 801a and the joint of the fuel line 22d are connected to the terminal chamber 6
It is located inside 99 and is connected to external pipes introduced from below the terminal chamber 699. Connected to external power supply. It has a plug at the end and the cord also passes through the terminal chamber 699.

In the outdoor heat exchanger chamber 14, the upper outdoor heat exchangers 11 and 11 for refrigerant are provided at the upper front and rear 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 11, a horizontal frame 36 forming a side wall of the casing 31.
A water supply cylinder 60 that is connected to the upper end of the head pipe 13c of the radiator 13 that is disposed diagonally upward and that faces the injection door 63 provided on the right end portion of the a and the column 34, and the opening 60a of the water supply cylinder 60. A cap 61 for opening and closing the
The pressure valve 62 arranged in the cap 61
It has and. The opening 60a is opened obliquely upward toward the metal net 38a forming the side wall of the casing 31 of the outdoor air conditioning unit 2. The pressure valve 62 is adapted to open and close a valve seat opening 60a formed in an intermediate portion of the water supply cylinder 60 by its valve body 62b, and the valve body 62b is biased in the closing direction by a spring 62a.

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

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

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

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

The lower end of the radiator 13 is located above the engine room side partition plates 41a and 41b and above 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 and refrigerant heat exchangers 11, 1
2 and each of the pipelines 29c, 2 that connect to each device in the piping room 10
9d, 16b, 16c and 30c are arranged on the right side plate 37d side of the piping chamber 10 and in the center part in the front-rear direction, and penetrate through one sealing pad 49 arranged at the left end part of the center partition plate 40. In this way, a plurality of conduits are sealed by one pad.

The sealing pad 49 has notches 49a connecting the respective conduit holes and the end portions on the left side plate 37c side. As a result, after the piping is completed, the sealing pad 49 can be fitted into the piping from the right side with the right side plate 37d removed. A central partition plate 40 is provided around the sealing pad 49.
By forming the right side plate 37d in a sealed state,
The piping chamber 10 and the heat exchange chamber 14 are partitioned.

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

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

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

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

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

When the exhaust gas flows through the exhaust pipes 23a, 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 also communicates with the cylinder head 5a through the breather passage 107.

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

Since the exhaust silencer 23c, the shift separator 23e, and the neutralizer 104 are arranged on the right side of the indoor air conditioning unit 2 and the drain port of the exhaust heat exchanger 23b is also arranged on the right side, the drain water pipes 101, 102,1
03 is short and drain water does not stay.

Since 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, the conduit 108 for guiding the breather gas after separating the oil in the oil separator 23d to the air cleaner 21c can be shortened. Further, the intake pipe 21a1 between the air cleaner 21c and the engine 5 can be shortened.

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

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

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

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

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

As described above, the high-temperature, high-pressure exhaust gas 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, 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 provided with bolts 235 and the side portion 207 of the casing 207.
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. 7 and 1 are provided on the rear side of the outdoor unit.
As shown in FIG. 2, the transmission box 50 and the terminal chamber 699 are provided to face the rear side plate 37b. A breaker 950, a power line terminal block 951 and a communication line terminal block 952 are provided on the surface of the transmission box 50, and the power line terminal block 951 is provided.
A power cord 953 is connected to the.

Inside the terminal chamber 699, a refrigerant line 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 pipe 22 penetrates the rear middle plate 44a, enters the engine room 7, and is connected to the flow control valve 22b 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 chamber 14 for accommodating the heat exchangers 11 and 12, and the refrigerant accumulator 8 in the refrigerant circuit.
And a refrigerant inlet / outlet end A with an outdoor unit, which is partitioned into a piping chamber 10 that accommodates the inside of the pipe chamber 10 or in 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 decompression 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 is removable, while the rear side wall is also removable.

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.
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.

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, by aligning the front surfaces, the engine room 7 of a plurality of units can be inspected from the same side. Further, the arrangement locations of the cold soot inlet / outlet end A and the fuel gas inlet 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 surface.

FIG. 13 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 floor 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.

[0085]

As described above, according to the first aspect of the invention, the refrigerant inlet / outlet portion with respect to the indoor unit and the fuel gas inlet end portion of the engine are arranged in the pipe chamber or outside the vicinity of the pipe, and By providing an inlet / outlet end and a fuel gas intake end, and arranging a fuel pipeline from the fuel gas intake end to the engine in the engine room, penetrating a partition wall that partitions the engine room and the piping chamber. ,
By taking out the refrigerant pipe and the fuel pipe that are piped from the outdoor unit to the outside, it is possible to simplify the handling of the pipe and achieve the compact space required for the pipe.

According to the second aspect of the present invention, since the pressure reducing valve is arranged in the middle of the fuel pipe and the pressure reducing valve is arranged in the piping chamber, the fuel gas after depressurization is introduced into the engine chamber where the temperature becomes high. Even if the pressure rises due to heating in the engine room, the absolute value of the pressure is low, and leakage is prevented.

[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 diagram showing one exhaust heat exchanger for convenience.

FIG. 12 is a diagram showing a connecting portion between the outdoor unit and the outside.

FIG. 13 is a front view of another embodiment of the outdoor air conditioning unit.

[Explanation of symbols]

 2 Outdoor air-conditioning unit 5 Engine 7 Engine room 8 Main accumulator 10 Piping room 11, 12 Heat exchanger 14 Heat exchanger room 22 Fuel pipeline A Inlet / outlet end B Fuel gas intake end

Claims (3)

[Claims] 1. An indoor unit is partitioned into an engine room for accommodating an engine, a heat exchanger room for accommodating a heat exchanger, and a pipe room for accommodating a refrigerant circuit, particularly an accumulator, and the pipe chamber or an outside of the pipe chamber. The refrigerant inlet / outlet portion of the indoor unit and the fuel gas inlet end portion of the engine are arranged in proximity to each other, and the compartment separating the engine room and the piping chamber from the fuel gas inlet end portion. An engine-driven heat pump device, characterized in that a fuel pipe line to the engine in the engine room is arranged through the wall. 2. The engine-driven heat pump device according to claim 1, wherein a pressure reducing valve is arranged in the middle of the fuel pipe, and the pressure reducing valve is arranged in the pipe chamber. 3. A space excluding the engine room in which the interior of the indoor unit is divided into an engine room for accommodating an engine, a heat exchanger room for accommodating a heat exchanger, and a piping chamber for accommodating a refrigerant circuit, in particular. In addition, the refrigerant inlet / outlet portion with respect to the indoor unit and the fuel gas inlet end portion of the engine are arranged close to each other, and a pressure reducing valve provided in the middle of the fuel pipe line from the fuel gas inlet end portion to the engine. Is disposed in a space other than the engine room, an engine-driven heat pump device.