JP2002138963A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily mount a compressor even in a narrow space such as an engine room of a vehicle without causing inconveneience such as damage. SOLUTION: In this compressor having a compressor body 11 for compressing and delivering gas sucked in by a compression mechanism arranged in a housing 31, and provided with a bypass piston for changing capacity of the gas delivered from the compression mechanism, and a solenoid valve for driving the bypass piston, a protective wall 32 is formed in the housing 31 so as to enclose the outer periphery of a projecting part 14a composed of a coil 21 of the solenoid valve projected outward from the outer periphery of the housing 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor used for an air conditioner, a refrigerator and the like, and more particularly to a compressor mounted on a vehicle such as an automobile.

[0002]

2. Description of the Related Art Conventionally, compressors have been used in air conditioners, refrigerators and the like. As this compressor, a scroll compressor having a characteristic of being able to operate with high efficiency and low noise is known, and is particularly mounted on a vehicle for an automobile air conditioner.

[0003] As described above, a compressor used in an air conditioner, a refrigerator, or the like absorbs heat by an evaporator, sucks and compresses a low-temperature and low-pressure refrigerant gas, and forms a high-temperature and high-pressure refrigerant gas. To the capacitor.
By the way, this type of compressor is provided with a bypass piston driven by an electromagnetic valve in order to control the output capacity of the refrigerant gas. That is, the pressure in the cylinder provided with the bypass piston is controlled by turning on / off the electromagnetic valve by external signal control,
The bypass piston is driven to control the volume of the refrigerant gas sent to the condenser.

[0004]

However, the solenoid valve and the bypass piston for controlling the capacity of the compressor are partially protruded from the side of the compressor body.
When mounted on the engine of the vehicle, there is a problem that the protruding bypass piston and the solenoid valve obstruct the mounting in a narrow engine room. In particular, as shown in FIGS. 11 and 12, when an external force is applied to the coil 21 constituting the solenoid valve protruding from the side of the compressor body 11 for cooling or the like, the coil 2 may be damaged. There was also.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a compressor which can be easily mounted in a narrow space without any trouble such as damage.

[0006]

According to a first aspect of the present invention, there is provided a compressor having a compressor main body for compressing and discharging gas sucked by a compression mechanism provided in a housing. A compressor that is provided with a bypass piston that changes the volume of gas discharged from the compression mechanism, and a solenoid valve that drives the bypass piston, wherein the solenoid valve partially includes the compressor body. It is characterized in that it is projected outward from the peripheral surface of the housing that constitutes, and the housing is formed with a protective wall surrounding the projection of the electromagnetic valve that is projected outward.

As described above, the electromagnetic valve protruding from the outer periphery of the compressor body is surrounded by the protective wall formed on the housing, so that the coil constituting the electromagnetic valve which is weak against impact can be reliably formed. Can be protected.

According to a second aspect of the present invention, in the compressor according to the first aspect, a notch is formed in the protective wall from a front end to a base end.

That is, since the notch is formed in the protection wall from the front end to the base end, the cooling efficiency of the coil constituting the solenoid valve can be increased while protecting the solenoid valve.
When the protrusion of the solenoid valve is arranged upward, water such as rainwater that has entered the protection wall can flow out from the lower end of the cutout.

According to a third aspect of the present invention, in the compressor according to the first or second aspect, the housing and the protrusion of the solenoid valve are at least partially in contact with each other. .

That is, since the projecting portion of the solenoid valve is at least partially abutted on the housing, it can be prevented from resonating with the vibration of the engine or the compressor, so that the solenoid valve is susceptible to vibration. The coil can be reliably protected.

[0012] The compressor according to claim 4 is the compressor according to claims 1 to 3.
In the compressor according to any one of the above, a protrusion of the solenoid valve protruding outward from a peripheral surface of the housing passes through an axis of the compressor main body and is parallel to a mounting surface to which the compressor main body is mounted. It is characterized in that it is arranged in a storage range surrounded by surfaces each inclined at 45 ° with respect to the axis of the compressor body with respect to the main surface.

That is, the protruding portion of the solenoid valve protrudes within a storage range surrounded by a surface which is inclined by 45 ° about the axis with respect to a plane passing through the axis of the compressor body and parallel to the mounting surface. Since it is arranged, it is possible to mount it more compactly along the mounting surface compared to the case where it protrudes to the mounting surface side or protrudes to the opposite side from the mounting surface, especially the narrow engine of the vehicle This is advantageous when stored in a room.

According to a fifth aspect of the present invention, in the compressor according to the fourth aspect, a part of a cylinder accommodating the bypass piston projects outward from a peripheral surface of the housing constituting the compressor body. The protrusion of the cylinder, which protrudes outward from the peripheral surface of the housing, is disposed in the storage range.

That is, since the projection of the bypass piston projecting from the outer peripheral side of the compressor body together with the projection of the solenoid valve is accommodated in the accommodation range, further compact mounting becomes possible.

A compressor according to a sixth aspect of the present invention is the compressor according to the fourth or fifth aspect, wherein the solenoid valve and the bypass piston are arranged in parallel.

As described above, since the solenoid valve and the bypass piston are arranged in parallel, the installation holes for accommodating the solenoid valve and the bypass piston can be formed in the housing from the same direction, thereby facilitating machining. be able to.

According to a seventh aspect of the present invention, in the compressor according to the fourth or fifth aspect, the solenoid valve and the bypass piston are arranged in series.

That is, since the solenoid valve and the bypass piston are arranged in series, the communication hole for communicating the solenoid valve and the bypass piston can also be formed in series in the same direction, thereby facilitating machining. Can be planned.

The compressor according to claim 8 is the compressor according to claims 1 to 3.
In the compressor described in any one of the above, a concave portion for locking a wiring for driving an electromagnetic valve is provided in the protective wall.

That is, since the recess for locking the wiring for driving the solenoid valve is provided on the protective wall formed integrally with the housing, the wiring can be locked without providing a separate part.
The number of parts can be reduced.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. In the variable displacement scroll compressor shown in FIGS. 1 and 2, a compressor body 11 including a cup-shaped housing 31 made of aluminum die-cast and a front case 41 is provided with an orbiting scroll 3 having a substrate and a spiral wrap, and a substrate. The fixed scroll 4 having a spiral wrap is installed so as to mesh with the spiral part, and forms a compression chamber C. In addition, the orbiting scroll 3 revolves with the rotation of the rotating shaft 6, so that the compression chamber C moves from the outside to the inside, the volume is reduced, and the compression action is performed.

The space formed by the back surface of the fixed scroll 4 substrate and the bottom surface of the cup-shaped housing 31 is divided into a high-pressure section HP, an intermediate-pressure section MP, and a low-pressure section LP. A cylinder 15 for housing the bypass piston 13 and an electromagnetic valve 14 are provided in the housing 31. The electromagnetic valve 14 is fixed by a C-ring 80, and the cylinder hole is closed by a lid 82. FIG. 1 shows an example in which the cylinder 15 and the solenoid valve 14 are arranged in series, and FIG. 2 shows an example in which the cylinder 15 and the solenoid valve 14 are arranged in parallel.

The solenoid valve 14 is driven by a coil 21.
When the solenoid valve 14 is opened by an external signal,
Since the throttle 27 and the communication passage 22 communicating with the HP are opened, the pressure in the cylinder 15 becomes high, and the bypass piston 13 moves to the right side in the drawing (the state opposite to that in FIG. 1). The communication passage 25 with the opened intermediate pressure section MP is closed, and large-capacity operation is performed.

Further, when the solenoid valve 14 is closed by an external signal, the throttle 27 and the communication passage 22 communicating with the high-pressure section HP are closed, so that high-pressure supply is not performed. The remaining high pressure gas is
1 flows into the low-pressure chamber LP through the gap between the piston 13 and the low-pressure chamber LP.
State), and the communication path 26 of the low-pressure part LP and the intermediate-pressure part MP opened in the cylinder 15 starts to communicate, so that the pressure in the intermediate-pressure part MP decreases to a low pressure. Then, since the pressure in the compression chamber C is higher than the low pressure,
The gas in the tank passes through the bypass hole 28 provided on the fixed scroll 4 substrate, the check valve 10 provided on the back of the fixed scroll 4 substrate, the intermediate pressure chamber MP, and the communication passages 25, 26, and 24 to the low-pressure section LP. It is bypassed and performs low capacity operation.

Here, in particular, as shown in FIG. 3, the coil 21 protruding from the side of the compressor main body 11 has a protective wall integrally formed with the housing 31 of the compressor main body 11 on its outer peripheral side. It is surrounded by 32. A notch 33 is formed on one side of the protective wall 32 from the distal end to the proximal end. In addition, as shown in FIG.
4 are formed, and the projections 34 are in contact with the lower surface of the coil 21. That is, since the protrusion 34 is in contact with the coil 21, the coil 21 does not resonate with the vibration of the engine or the compressor. Further, as shown in FIG. 5, a concave portion (recess) is formed on the upper end surface of the protective wall 32.
A wire 50 connected to the coil 21 is fitted into the concave upper portion and locked.

Next, the mounting structure of the compressor having the above structure in the engine room of the vehicle will be described. FIG.
The compressor is fixed to the side of the engine E by mounting bolts 41 as shown in FIG.

At this time, the compressor includes a cylinder 15 for accommodating the bypass piston 13, a projection 13 a of the closing lid 82 from the outer periphery of the compressor body 11, and the solenoid valve 1.
4 has an axis O with respect to a parallel plane Y that passes through the axis O of the compressor body 11 and is parallel to the mounting surface Ea of the engine E that is mounted by the mounting bolt 41. 45 ° each as center
It is stored in a storage range A1 surrounded by the inclined surfaces L1 and L2.

The cylinder 15 for accommodating the bypass piston 13 and the projection 13 of the closing lid 82 are provided.
a, the protruding portion 14a of the solenoid valve 14 may be provided at any place as long as it is within the storage range A1, and FIG. 7 shows an example in which the protruding portions 13a and 14a are arranged in parallel on the upper side, respectively. , FIG. 8 shows the protrusions 13a, 1
This is an example in which 4a are arranged in series so as to face up and down.

As described above, according to the compressor, the coil 21 of the solenoid valve 14 projecting from the outer periphery of the compressor body 11
Since the projecting portion 14a is surrounded by the protective wall 32 formed on the housing 31, the coil 21 of the electromagnetic valve 14 that is vulnerable to impact can be reliably protected.

Further, since the notch 33 is formed in the protective wall 32 from the distal end to the proximal end, the cooling efficiency of the coil 21 constituting the electromagnetic valve 14 can be increased while protecting the electromagnetic valve 14. When the protrusion 14 a of the solenoid valve 14 is disposed upward, water such as rainwater that has entered the protection wall 32 can flow out from the lower end of the notch 33 to the outside.

In addition, the storage area A1 enclosed by planes L1 and L2 which are respectively inclined by 45 ° about the axis O with respect to a parallel plane Y passing through the axis O of the compressor body 11 and parallel to the mounting surface Ea. The protrusion 14a of the solenoid valve 14
Is provided, compact mounting along the mounting surface Ea is possible as compared with the case of protruding to the mounting surface Ea side or protruding to the opposite side to the mounting surface Ea. This is advantageous when stored in a narrow engine room.

The bypass piston 1 protrudes from the outer periphery of the compressor body 11 together with the coil 21 of the solenoid valve 14.
Since the three protruding portions 13a are also stored in the storage range A1, further compact mounting is possible. Furthermore, since the solenoid valve 14 and the bypass piston 13 are arranged in parallel, the solenoid valve 14 and the bypass piston 1
3 can be formed in the housing 31 from the same direction, and processing can be facilitated.

The solenoid valve 14 and the bypass piston 13
Are arranged in series, the communication holes 22 for communicating the solenoid valve 14 and the bypass piston 13 can also be formed in series in the same direction, and processing can be facilitated. As shown in FIG. 9, a plurality of notches 3 are provided as protection walls 32 for protecting the coils 21 of the solenoid valve 14.
3 may be formed.

With this arrangement, the heat radiation of the coil 21 can be further improved, and when the coil 21 is disposed above, a further drainage effect can be obtained.

FIG. 10 shows the housing 3
The protective wall 32 is formed integrally with the housing 31 by disposing the coil 21 so as to be close to the space where the refrigerant gas is drawn in through the gas inlet hole 44 formed in the housing 1. According to this, since the periphery of the coil 21 is cooled by the refrigerant gas drawn into the space,
The cooling efficiency can be further improved.

[0037]

As described above, according to the compressor of the present invention, the following effects can be obtained. According to the compressor of the first aspect, the electromagnetic valve protruding from the outer periphery of the compressor body has a structure in which the protruding portion of the electromagnetic valve is surrounded by the protective wall formed in the housing, so that the electromagnetic valve is vulnerable to impact. The coil can be reliably protected.

According to the compressor of the second aspect, since the notch is formed in the protective wall from the distal end to the proximal end,
The cooling efficiency of the coil constituting the solenoid valve can be increased while protecting the solenoid valve. When the protrusion of the solenoid valve is arranged upward, water such as rainwater that has entered the protection wall can flow out from the lower end of the cutout.

According to the third aspect of the compressor, since the projecting portion of the solenoid valve is at least partially abutted on the housing, it can be prevented from resonating with the vibration of the engine or the compressor. In addition, it is possible to surely protect the coil constituting the electromagnetic valve which is vulnerable to vibration.

According to the fourth aspect of the present invention, the compressor is disposed within a storage range surrounded by surfaces each inclined by 45 ° about the axis with respect to a plane passing through the axis of the compressor body and parallel to the mounting surface. , The protruding part of the solenoid valve is arranged, so that it can be mounted more compactly along the mounting surface than when it protrudes to the mounting surface side or protrudes to the opposite side to the mounting surface And, in particular,
This is advantageous when housed in a narrow engine room of a vehicle.

According to the fifth aspect of the present invention, the projecting portion of the bypass piston projecting from the outer peripheral side of the compressor main body is housed in the housing range together with the projecting portion of the solenoid valve. It becomes possible.

According to the compressor of the sixth aspect, since the solenoid valve and the bypass piston are arranged in parallel, the installation holes for accommodating the solenoid valve and the bypass piston can be formed in the housing from the same direction. In addition, processing can be facilitated.

According to the seventh aspect of the present invention, since the solenoid valve and the bypass piston are arranged in series, the communication holes communicating the solenoid valve and the bypass piston are also formed in series in the same direction. And the processing can be facilitated.

According to the compressor of the eighth aspect, since the recess for locking the wiring for driving the solenoid valve is provided on the protective wall formed integrally with the housing, the wiring is locked without providing another component. And the number of parts can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a compressor illustrating a configuration and a structure of a compressor according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the compressor illustrating the configuration and structure of the compressor according to the embodiment of the present invention.

FIG. 3 is a perspective view of a part of the compressor illustrating a structure of the compressor according to the embodiment of the present invention.

FIG. 4 is a partial cross-sectional view of the compressor illustrating a structure of the compressor according to the embodiment of the present invention.

FIG. 5 is a perspective view of a part of the compressor illustrating a structure of the compressor according to the embodiment of the present invention.

FIG. 6 is a schematic front view of the compressor installed in the engine for explaining how to install the compressor according to the embodiment of the present invention.

FIG. 7 is a schematic front view of the compressor installed in the engine for explaining how to install the compressor according to the embodiment of the present invention.

FIG. 8 is a schematic front view of the compressor installed in the engine for explaining how to install the compressor according to the embodiment of the present invention.

FIG. 9 is a perspective view of a part of the compressor illustrating another structure of the compressor according to the embodiment of the present invention.

FIG. 10 is a schematic view of a compressor housing illustrating another structure of the compressor according to the embodiment of the present invention.

FIG. 11 is a perspective view of a part of the compressor illustrating a conventional structure of the compressor.

FIG. 12 is a partial cross-sectional view of the compressor illustrating a conventional structure of the compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Compressor main body 13 Bypass piston 13a Projection part 14 Solenoid valve 14a Projection part 31 Housing 32 Protective wall 33 Notch part 35 Concave part (concave part) Ea Mounting surface O Axis line

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yasuhiro Wada 3-1-1 Asahi-cho, Nishibiwajima-cho, Nishi-Kasugai-gun, Aichi Prefecture F-term (Ref.) 3H003 AA05 AB07 AC03 AD01 CB04 CC04 CC05 CD01 CD05 CF01 3H029 AA02 AA14 AA21 AB03 BB31 BB32 CC14 CC27

Claims (8)

[Claims] 1. A bypass piston for changing the volume of gas discharged from a compression mechanism, comprising: a compressor main body for compressing and discharging gas sucked by a compression mechanism provided in a housing; A solenoid valve to be driven, wherein a part of the solenoid valve protrudes outward from a peripheral surface of the housing constituting the compressor main body; A protective wall surrounding the protrusion of the solenoid valve protruding from the compressor is integrally formed. 2. The compressor according to claim 1, wherein a notch is formed in the protection wall from a front end to a base end. 3. The compressor according to claim 1, wherein the housing and the protruding portion of the electromagnetic valve protruding outward are at least partially in contact with each other. 4. A projecting portion of the solenoid valve protruding outward from a peripheral surface of the housing is formed on a surface passing through an axis of the compressor main body and parallel to a mounting surface on which the compressor main body is mounted. The compressor according to any one of claims 1 to 3, wherein the compressor is disposed in a storage range surrounded by surfaces each inclined by 45 ° about an axis of the compressor body. 5. A cylinder accommodating said bypass piston, a part of which protrudes outward from a peripheral surface of said housing constituting said compressor body, and said cylinder protrudes outward from a peripheral surface of said housing. The compressor according to claim 4, wherein a projecting portion of the bypass piston is disposed in the storage range. 6. The compressor according to claim 4, wherein the solenoid valve and the bypass piston are arranged in parallel. 7. The compressor according to claim 4, wherein said solenoid valve and said bypass piston are arranged in series. 8. The device according to claim 1, wherein a recess is formed in the protection wall for locking a wire connected to the solenoid valve. Compressor.