JPH10238821A - Outdoor machine unit of engine-driven heat pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow vibration of, for example, an engine to escape to the ground properly by reducing the number of parts of an outdoor machine unit and simplifying a manufacturing process. SOLUTION: An outdoor machine unit is constituted by integrating a power part containing a compressor 21 and an engine 22 in a framework that consists of a power part storage case 1 and an auxiliary case 17 being arranged at the upper part, components such as the fuel system of the engine 22, an intake/ exhaust system, a cooling system, a lubrication system, and a refrigerant circulation system that is connected to the compressor 21. A frame 2 that is the main part of the power part storage case 1 has a four-face wall consisting of an upper-face part 2a, a bottom-face part 2b, and back-face part (2c), and a spare left-side-face part 2d and a post 2e at a front-face right-side-corner part, and is molded in one piece with aluminum alloy die casting. Especially, a leg part 10 is formed in one piece at the bottom-face part 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit in a heat pump device such as an engine driven air conditioner.

[0002]

2. Description of the Related Art Conventionally, an engine-driven heat pump device in which a compressor is driven by an engine is generally known in air conditioners and the like. When applied to an air conditioner, the engine-driven heat pump device includes an indoor unit disposed in one or more rooms and an outdoor unit connected to the indoor unit.

The outdoor unit includes a power unit including a compressor and an engine, a fuel system, an intake / exhaust system of the engine,
A cooling system, a lubrication system, a part of a refrigerant circulation system connected to the compressor, and the like are provided, and these are housed in a case (see, for example, JP-A-61-162861).

[0004]

The case of this type of outdoor unit is provided with a leg for supporting the case, and this leg is used to support a heavy object such as a compressor or an engine. It must have rigidity, and is generally provided by fixing a separately formed leg to the lower surface of the bottom of the case by welding, bolts, or the like.

However, it is troublesome to attach and fix the legs to the bottom of the case. Particularly, in the case of a large outdoor unit, the bottom is large and heavy. It is necessary and the workability is poor.

On the other hand, the legs of the case play a role of reducing the vibration noise by releasing the vibration of the engine or the like to the ground. For example, when the case and the legs are formed of different materials. Is not preferable because the vibration reduction function may be impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the vibration of an engine or the like can be appropriately released to the ground while reducing the number of parts of an outdoor unit and simplifying a manufacturing process. It is an object of the present invention to provide an outdoor unit of an engine-driven heat pump device.

[0008]

SUMMARY OF THE INVENTION The present invention relates to an outdoor unit for an engine-driven heat pump device in which components such as a compressor and an engine are housed in a storage case, wherein the storage case is supported on the bottom lower surface of the storage case. And at least the bottom and the legs of the storage case are integrally formed by casting.

With this configuration, since the legs are integrally formed on the bottom of the storage case, it is not necessary to attach the legs each time the outdoor unit is assembled, thereby improving workability. Moreover, since the storage case and the legs are integrally formed by casting, the rigidity of the legs is high, and the vibration reduction function is properly exhibited.

[0010]

Embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 3 show an outdoor unit and its internal structure in an air conditioner as an example of an engine-driven heat pump device according to the present invention. As shown in FIGS. 1 and 2, the outdoor unit has a framework including a power unit storage case 1 and an auxiliary case 17 disposed above the power unit storage case 1. It has a built-in structure.

The power section storage case 1 stores and holds a power section including a compressor of a heat pump device and an engine for driving the same. The power section storage case 1 has a substantially rectangular box shape. A frame 2 which is a main part of the apparatus 1 is made of a casting in which at least four walls, namely, upper and lower surfaces, one side surface and a back surface, are integrally formed.

Specifically, the frame 2 is
As shown in FIG. 4 to FIG. 6, an opening 3 is provided on substantially the entire front side, and an opening is partially provided on one side surface (the right side surface in FIG. 3). Each wall of the rear part 2c and the left side part 2d, and a support 2e provided at a corner part between the front and right sides are integrally formed by aluminum die casting, and the inside surrounded by each wall is a power source. This is the engine room that houses the section. The bottom part 2
b protrudes outward from the left side surface portion 2d of the frame 2, and a small chamber for mounting a refrigerant circulation system pipe or the like of the heat pump device is formed above the protruding portion 2f.

A window 4 for passing an intake pipe and the like of an engine 22 and a hole 5 for passing an exhaust pipe are provided on the right side of the upper surface 2a of the frame 2. The left part of the upper surface part 2a is formed lower than the right part, and a part thereof
A concave portion 6 is formed to collect water generated by dew condensation in an accumulator 64 and the like and guide the collected water to the rear side. A mounting portion 7 for a refrigerant circulation system is provided on a wall surface at a front end of the concave portion 6.
A vertical wall 2g is formed at the left front end of the upper surface portion 2a, and passages 9a and 9b for vertically passing a wire harness are formed across a partition wall 8 formed on the vertical wall 2g.

As shown in FIGS. 6 to 9, a pair of legs 10 extending in the front-rear direction and located near both left and right ends are provided on the bottom surface 2b of the frame 2 on the lower surface thereof. Reinforcing ribs 11 and sound insulation walls 12 provided between the legs 10 are integrally connected to each other, and a protrusion for preventing rotation of a mount bracket 25 to be mounted in an engine room is provided on the upper surface side. 13 and mounting holes 14 are provided. The left and right mounting brackets 25 are prevented from rotating by two of the protrusions 13 on the left side and one on the right side.

The leg 10 has a portion 10a projecting to the front and rear sides in contact with the floor surface, and a portion (a portion located below the bottom surface 2b) 10b therebetween is formed in an inverted U-shaped cross section. A rib 10c and a bolt boss 10d of a bolt for mounting the mounting bracket 25 are formed inside.

The sound insulation wall 12 is formed of a thin plate-shaped projection,
It is formed on the front and rear edges of the frame 2 so as to close the gap between the bottom surface 2b and the installation surface. Also,
The reinforcing ribs 11 are formed of protrusions slightly smaller than the sound-insulating walls 12, are formed in a grid at a portion surrounded by the legs 10 and the sound-insulating walls 12, and have the corners of each grid in a diagonal direction. It is formed so as to be connected to.

The left side surface 2d is provided with a pipe insertion portion (not shown) for inserting a wire harness, a cooling water pipe, and the like, and a bracket 15 for mounting a packed valve and a bracket for mounting a front panel described later. 16 and the like are integrally coupled.

The front panel 2 covers the opening 3 on the front side, the right panel covers the opening on the right side, and the projecting portion 2 outside the left side 2d.
The power unit storage case 1 is configured by detachably attaching a side cover that surrounds the small chamber above f, a lower back cover that covers the lower rear part, and the like with bolts or the like.

On the other hand, as shown in FIG. 1, the auxiliary case 17 has a synthetic resin main body portion 18 provided with a hollow portion 19 for arranging a fan at a substantially central portion. In addition, various covers such as a ceiling cover or a fan guard are detachably attached with bolts or the like.

The main body 18 of the auxiliary case 17 is installed and fixed on the frame 2 of the power storage case 1, and the above-mentioned various panels and covers are attached thereto. By attaching the outdoor heat exchanger 20 and the radiator 56, a frame portion of the outdoor unit is configured. In FIGS. 1 and 2, the inside is shown with the covers and panels of both cases 1 and 17 removed for convenience.

A power unit including a compressor 21 of a heat pump device and an engine 22 for driving the compressor 21 is stored in an engine room formed by the frame 2 of the power unit storage case 1. In this embodiment, the engine 22 is a water-cooled gas engine.
2 and a rotating shaft of the compressor 21 are connected via a drive belt 23, and the housing of the compressor 21 is connected to the crankcase of the engine 22, and the engine 22 and the compressor 21 are mounted. 24 and mount bracket 25
And is installed on the bottom surface 2b of the frame 2 via the.

More specifically, as shown in FIG. 13, a mount bracket 25a is mounted on a head 22b of the engine, and a mount 2 is mounted between the mount bracket 25a and the mount bracket 25 mounted on the bottom surface 2b.
4 are arranged and the engine 22 is supported. The mount brackets 25 are respectively disposed directly above the legs 10, so that large gravity when the engine 22 vibrates up and down causes the mount 24, the mount bracket 25, and the protruding portions 10 a of the legs 10 to be described later. Is transmitted to the floor via the portion 10b having an inverted U-shaped cross section, so that a bending load is not repeatedly applied to the bottom surface 2b of the frame 2. Therefore, the weight of the bottom surface 2b can be reduced. An exhaust gas heat exchanger 42 described later is connected to the engine head portion 22b. The exhaust gas heat exchanger 42 has an L-shape as shown in the figure, and the outdoor heat exchanger 20 is provided in a concave portion thereof. It is arranged to enter.

The auxiliary case 17 is provided with a blower fan 30 in the cavity 19 thereof. further,
An intake system, a fuel system, an exhaust system, a lubrication system, and a cooling system of the engine and a part of a refrigerant circulation system connected to the compressor 21 are provided over the two cases 1 and 17.

The intake system of the engine includes an air cleaner 31.
And an intake pipe 32 for introducing outside air to the air cleaner 31 and an intake pipe 33 for guiding the air passing through the air cleaner 31 to the engine. The air cleaner 31 and the intake pipe 32 are arranged in the auxiliary case 17. The intake pipe 33 extends downward from the air cleaner 31, extends through the window hole 4 provided in the upper surface 2 a of the frame 2 into the frame 2, and is provided above the head 22 b of the engine 22. 34. The air and the fuel are mixed by the mixer 34, and the air-fuel mixture is supplied to the engine 22. In addition, below the air cleaner 31, an oil separator 35 connected to the blow-by gas passage is arranged.

The fuel system of the engine includes a fuel supply pipe 36 connected to the mixer 34.
The upstream side extends through the left side surface portion 2d of the frame 2 and extends outward, and is connected to an external fuel gas supply source (not shown). 38 and a zero governor 39 are interposed.

The exhaust system of the engine includes an exhaust pipe 4 derived from an exhaust gas heat exchanger 42 connected to the side of the engine 22.
The exhaust pipe 41 extends upward, reaches the inside of the auxiliary case 17 through the hole 5 provided on the upper surface of the frame 2, and is connected to the exhaust silencer 43 disposed above the air cleaner 31. . Reference numeral 44 denotes a drain filter for filtering drain water from the exhaust gas heat exchanger 42, the exhaust silencer 43, and the like.

The engine lubrication system has an oil tank 45. The oil tank 45 is disposed on the side of the engine 22 and is connected to the engine 22 via an oil flow pipe 46.
Connected to the oil pan.

The cooling system of the engine includes a water pump 51
Cooling water pipe 5 that guides cooling water discharged from
0a, and the cooling water pipe 50a is connected to the exhaust gas heat exchanger 42.
Through a water pump 52 to a cooling water inlet of a water jacket 53 of the engine 22, and a cooling water pipe 50 b led out from a cooling water outlet of the water jacket 53 via a thermostat 54 is connected to a linear three-way valve 55. I have. Further, the linear three-way valve 55 to 2
The cooling water pipes 50c and 50d are led out, and each cooling water pipe 5c
0c and 50d are radiator 56 and double tube heat exchanger 57
And cooling water pipes 50 respectively derived from the radiator 56 and the double pipe heat exchanger 57.
e and 50f join and are connected to the cooling water pump 51. In addition, a recovery tank 58 and a pressure cap 59 are connected to the cooling water pipe 50f.

The water pump 52 is disposed in a water pump chamber 92 provided at a lower portion on the rear side of the frame 2. The water pump 51 is disposed in a small chamber outside the left side surface portion 2 d of the frame 2, and the overhang portion 2 f Is placed on top. The radiator 56 is provided on the front side of the outdoor heat exchanger 20 and is arranged behind the blower fan 30. Further, the double-tube heat exchanger 57, the recovery tank 58, and the pressure cap 59 are disposed above the auxiliary case 17.

On the other hand, a refrigerant circulation system connected to the compressor 21 includes a discharge side refrigerant pipe 60a having an upstream end connected to a discharge port of the compressor 21 via a flexible tube 61a, and a flexible tube connected to a suction port of the compressor 21. And a downstream end of the suction-side refrigerant pipe 60a connected to the four-way valve 62. The downstream end of the discharge-side refrigerant pipe 60a and the upstream end of the suction-side refrigerant pipe 60b are connected to the four-way valve 62. An oil separator 63 is interposed in the discharge side refrigerant pipe 60a, and an accumulator 64 is interposed in the suction side refrigerant pipe 60b. The oil separator 63
The accumulator 64 is disposed on the left side of the auxiliary case 17.

From the four-way valve 62, the refrigerant pipes 60c, 60e
Is derived. The refrigerant pipe 60c extends downward to reach a small chamber outside the left side surface portion 2d of the frame 2, and branches into a plurality of parts at the tip of the small chamber via a packed valve 65 and a strainer 66. Is provided with a flange 67 at its tip.

The refrigerant pipe 60e is connected to the double pipe heat exchanger 5
7, the refrigerant reaches the outdoor heat exchanger 20, and the refrigerant pipe 60f led out of the outdoor heat exchanger 20 reaches the small chamber outside the left side portion 2d of the frame 2, where the filter dryer 68 and the sight glass are placed. 69, packed valve 7
The electronic expansion valve 72 and the strainer 73 are interposed in the branch pipe 60g led out from the branch section 71 through the branch pipe 71, and a flange 7 is provided at the tip of each branch pipe 60g.
4 are provided.

A pipe for connection to a plurality of indoor heat exchangers (not shown) is detachably connected to the flanges 67 and 74 at the ends of the branch pipes 60d and 60g.

Here, each of the packed valves 65, 70
Are the brackets 1 formed on the frame 2 respectively.
5 and FIG. 10 and FIG. 11 specifically show the mounting structure. As shown in these figures, each of the packed valves 65 and 70 is provided with a mounting flange 80 projecting left and right, and a notch 81 for screwing is provided at one end of the flange 80. Is formed. The bracket 15 is provided with two valve mounting portions each having a perforated portion 15a for fitting the flange 80 therein and a screw hole 15b. As shown in these figures, with one end of the flange 80 fitted in the perforated portion 15a, a screw is inserted through the cutout 81 into the screw hole 15b.
The valves 65 and 70 are attached to the frame 2 by being screwed into the frame 2.

FIG. 12 shows a layout of electric wiring for electric components in the engine room formed by the frame 2.

As shown in this figure, a wire harness 90 for a power supply system (200 V system) and a wire harness 91 for other signal systems are routed in the engine room. These wire harnesses 90 and 91 are respectively connected to the electrical component box 9 attached to the auxiliary case 17.
2 (see FIG. 1) and is derived from the left side 2 of the frame 2
d is introduced into the engine room.

The trunks of the wire harnesses 90 and 91 are as follows:
As shown in the drawing, the cables are respectively routed along the upper surface 2a of the frame 2 through passages 9a and 9b formed in a vertical wall 2g at the left front end of the upper surface 2a. In this manner, the wiring harnesses 90 and 91 are passed through the passages 9a and 9b and are partitioned by the partition wall 8, so that the influence of noise on the signal wire harness 91 by the power supply wire harness 90 is reduced. It has become. Especially,
The power supply wire harness 90 is passed through the upper passage 9a and is supported by the partition wall 8, so that the wire harness 90 composed of a bundle of wires having a relatively large wire diameter does not hang down by its own weight. It has been like that.

From the main part of the power supply system wiring harness 90, heaters such as the compressor 21, the oil pan of the engine 22, the oil separator 35, the drain filter 44, etc., or the starter motor, the ignition coil, the cooling Electric wires for the respective electric components such as the water pumps 51 and 52 are branched and connected to each other. , Crankshaft pulsar,
Wires for various electrical components such as a camshaft pulsar, an engine oil level switch, and a throttle motor are branched and connected to each other.

According to the outdoor unit of the present embodiment as described above, the power unit including the compressor 21 and the engine 22 is housed in the power unit housing case 1 and the fuel system, the intake / exhaust system, and the cooling system of the engine. The components and piping of the lubrication system and the components and piping of the refrigerant lubrication system connected to the compressor 21 are rationally arranged in the power storage case 1 and the auxiliary case 17 installed above the power storage case 1. Is done.

The frame 2, which is the main part of the power unit storage case 1, has four walls of a top surface 2a, a bottom surface 2b, a back surface 2c and a left side surface 2d, and a support 2e at the front right corner. Therefore, the manufacturing process is greatly simplified as compared with, for example, a method in which the wall plates and the columns on each surface constituting the frame are individually formed by sheet metal. In particular, in the above frame 2,
Since the leg 10 is integrally formed on the bottom surface 2b, the manufacturing process is simplified in this respect as well.

Further, the rigidity of the frame 2 is greatly increased by forming the four surfaces and the pillar 2e as an integral casting, and the leg 10 is provided integrally with the bottom surface 2b. Vibration is easily released from the ground to the ground. Therefore, the power unit, the auxiliary case 17 on the frame 2, various outdoor unit component members, and piping are supported by the highly rigid frame 2,
The strength of the entire outdoor unit is increased, and the vibration of the engine 22 and the like is reduced.

In addition, in the frame 2, in addition to the four surfaces, the columns 2e and the legs 10, a bracket 15 for mounting a packed valve and a bracket 16 for mounting a front panel are integrally formed with the frame 2. Thus, the number of parts can be reduced, and the manufacturing process is further simplified.

[0044]

As described above, the present invention relates to an outdoor unit for an engine-driven heat pump device in which components such as a compressor and an engine are contained in a storage case. Since the supporting legs are provided and at least the bottom and the legs of the storage case are integrally formed by casting, the number of components of the outdoor unit can be reduced and the manufacturing process can be simplified. Moreover, the rigidity of the storage case is increased by integrally molding the storage case and legs by casting,
The strength of the entire outdoor unit can be increased, and the vibration can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an outdoor unit of an engine-driven heat pump device according to the present invention.

FIG. 2 is a side view of the outdoor unit.

FIG. 3 is an explanatory diagram showing an internal configuration of the outdoor unit.

FIG. 4 is a front view showing a frame of a power unit storage case applied to the outdoor unit.

FIG. 5 is a plan view of the frame.

FIG. 6 is a sectional view of the frame.

FIG. 7 is a bottom view of the frame.

FIG. 8 is a sectional view of the frame taken along the line AA in FIG. 5;

FIG. 9 is a sectional view of the frame taken along the line BB in FIG. 5;

FIG. 10 is a sectional view showing a structure for mounting a packed valve to the frame.

FIG. 11 is a front view showing the mounting structure.

FIG. 12 is a front view showing a wire harness arranged in a power unit storage case.

FIG. 13 is a cross-sectional view corresponding to FIG. 8, showing the inside of the power unit storage case.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power storage case 2 Frame 2a Top part 2b Bottom part 2c Back part 2d Left side part 2e Prop 2f Overhanging part 2g Vertical wall 10 Leg 17 Auxiliary case 21 Compressor 22 Engine

Claims (1)

[Claims] 1. An outdoor unit of an engine-driven heat pump device in which components such as a compressor and an engine are housed in a storage case, wherein a leg for supporting the storage case is provided on a bottom lower surface of the storage case. An outdoor unit of an engine-driven heat pump device, wherein at least the bottom portion and the legs are integrally formed by casting.