JP3562237B2 - Combined type compressor - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a composite compressor (hybrid compressor) driven by an electric motor and an external drive source other than an electric motor such as an engine, and is effective when applied to a vehicle air conditioner.
[0002]
[Prior art]
As a composite type compression device, for example, in the invention described in Japanese Patent Application Laid-Open No. 4-164169, a driving force supplied from an engine is transmitted to a compression mechanism via an electromagnetic clutch. When the compression mechanism is driven by the engine, the compression mechanism (discharge capacity) is controlled by controlling ON / OFF of the electromagnetic clutch. On the other hand, when the compression mechanism is driven by the electric motor, the electromagnetic clutch is turned OFF. The compression mechanism (discharge capacity) is controlled by disengaging the clutch and controlling the energization of the electric motor.
[0003]
[Problems to be solved by the invention]
By the way, since the impact force when turning on (connecting) the electromagnetic clutch is large, not only in the case of the composite type compression device, the discharge capacity of the fluid discharged from the compression mechanism has been changed in recent years instead of turning on and off the electromagnetic clutch. One that uses a so-called variable discharge capacity mechanism is becoming popular.
[0004]
And, as in the invention described in the above-mentioned publication, the variable compression capacity mechanism is simply provided in a composite type compression apparatus that switches between a case where the compression mechanism is driven by the engine and a case where the compression mechanism is driven by the electric motor by using an electromagnetic clutch. The addition of the composite compression apparatus complicates the structure of the composite compression apparatus and increases the manufacturing cost of the composite compression apparatus.
In view of the above points, an object of the present invention is to eliminate the electromagnetic clutch in a composite compression device, thereby simplifying the configuration of the composite compression device and reducing the manufacturing cost of the composite compression device.
[0005]
[Means for Solving the Problems]
The present invention uses the following technical means to achieve the above object. According to the first to third aspects of the present invention, the first one-way clutch (120) that transmits only the rotational force in one direction to the shaft (102) among the rotational forces transmitted from the external drive source to the shaft (102). A variable discharge capacity mechanism (150) for changing the amount of fluid discharged from the compression mechanism (110); and a pulley (103) disposed outside the housing (101) and receiving rotational force transmitted from an external drive source. The first one-way clutch (120) is disposed between the pulley (103) and the shaft (102) while being housed in the pulley (103), and the variable discharge capacity is The mechanism (150) discharges the fluid from the compression mechanism (110) when the compression mechanism (110) is stopped while the shaft (102) is driving the movable part (112). Is not to be, characterized by varying the amount of fluid discharged from the compression mechanism (110).
[0006]
Accordingly, the rotational force from the external drive source is transmitted to the shaft (102) via the first one-way clutch (120), so that the direction in which the first one-way clutch (120) can transmit the rotational force is movable. The electromagnetic clutch can be dispensed with if it matches the movable direction of the part (112). Therefore, since the configuration of the composite compression device can be simplified, the manufacturing cost of the composite compression device can be reduced.
[0007]
According to a second aspect of the present invention, the second one-way clutch (160) is disposed between the rotor (132) and the shaft (102).
Accordingly, when the compression mechanism (110) is driven by the external drive source, the rotor (132) does not rotate, so that the rotational force transmitted from the external drive source does not need to operate the compression mechanism (110). It can be prevented from being consumed for work.
According to the third aspect of the present invention, the compression mechanism (110) and the electric motor section (130) are partitioned by a partition wall disposed therebetween, and the fluid in the compression mechanism (110) is separated by the partition wall. It is characterized in that it is prevented from entering the electric motor section (130).
[0008]
In addition, the code | symbol in parenthesis of each said means shows the correspondence with the concrete means of embodiment described later. However, the reference numerals in parentheses are the reference numerals used in the specific means described in the representative embodiments when there are a plurality of embodiments corresponding to the means given the reference numerals.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
(1st Embodiment)
In the present embodiment, a composite type compression device (hereinafter, abbreviated as a compressor) according to the present invention is applied to an air conditioner of a so-called hybrid vehicle that runs with an internal combustion engine such as an engine and an electric motor. is there.
[0010]
FIG. 1 is a cross-sectional view of a compressor 100 according to the present embodiment. A compression mechanism 110 that sucks and compresses a refrigerant (fluid) is formed in a housing 101 at one axial end of the compressor 100.
In the present embodiment, the compression mechanism 110 includes a fixed scroll (fixed portion) 111 fixed to the housing 101 and a movable scroll (movable portion) 112 that rotates (revolves) with respect to the fixed scroll 111. A well-known scroll-type compression mechanism is employed. Reference numeral 113 denotes a suction port connected to the outlet side of an evaporator (not shown), reference numeral 114 denotes a suction chamber, reference numeral 115 denotes a discharge chamber for absorbing pulsation of compressed refrigerant, and reference numeral 116 denotes a condenser (see FIG. (Not shown).
[0011]
Reference numeral 102 denotes a shaft for driving the movable scroll 112. A crank portion 102a eccentric from the axis of the shaft 102 by a predetermined amount is formed at one end of the shaft 102, and the movable scroll 112 rotates around the crank portion 102a. It is connected as possible. Reference numeral 102b denotes a bearing that rotatably holds the shaft 102 inside the housing 101.
[0012]
On the other hand, of the rotational force transmitted (supplied) from the engine (not shown) to the pulley 103 via the V-belt (not shown), only the rotational force in one direction is provided on the other end side of the shaft 102. Is disposed between the pulley 103 and the shaft 102.
As shown in FIG. 2, the first one-way clutch 120 according to the present embodiment has a well-known roller in which a plurality of columnar rollers 122, springs 123, and washers 124 are provided in a holder (holding member) 121, respectively. This is a one-way clutch.
[0013]
The direction in which the first one-way clutch 120 can transmit the rotational force coincides with the movable direction of the movable scroll 112. When the pulley 103 rotates in the movable direction of the movable scroll 112, the rotational force is always applied to the shaft 102. It is configured to be transmitted. Between the pulley 103 and the compression mechanism 110, a stator 131 fixed to the housing 1 01, and the electric motor 130 having a rotor 132 that rotates within the stator 131 is configured. Then, the shaft 102 is press-fitted and fixed to the rotor 132 so that the shaft 102 and the rotor 132 rotate integrally. Incidentally, in the present embodiment, the electric motor unit 130 is an induction motor type motor.
[0014]
The fixed scroll 111 is provided with a first communication path 151 that connects the suction chamber 114 and the discharge chamber 115, and the communication path 151 is opened and closed by a solenoid valve 152. The electromagnetic valve 152 is controlled by an electronic control unit (ECU) 140 according to a program stored in advance based on the operating state of the engine and the operating state of the air conditioner. Incidentally, the ECU 140 is a well-known one including a central processing unit (CPU), a readable / writable storage device (RAM), a read-only storage device (ROM), an input / output port, and the like.
[0015]
Further, the fixed scroll 111, second communication passage 153 of the plurality of communicating the actuation chamber _{V C} with the discharge chamber 115 formed by both scrolls 111 and 112 are the formation of each second communication path 153 the discharge chamber 115 side, the refrigerant in the working chamber V _C from the discharge chamber 115 is prevented from flowing back, the check valve 154 is disposed in the lead valve type. In addition, 155 is a valve stop plate (stopper) that regulates the maximum opening of the check valve 154.
[0016]
Next, the operation of the compressor 100 according to the present embodiment will be described.
1. When the compression mechanism 110 is operated by the engine during operation of the engine (external drive source), the solenoid valve 152 is closed. Thus, the pressure in the discharge chamber 115 with the rotation of the movable scroll 11 2 rises, the check valve provided in the second communication passage 153 that communicates with the working chamber VC having a pressure lower than the pressure in the discharge chamber 115 154 is closed. Therefore, the refrigerant is discharged into the discharge chamber 115 only from the working chamber VC that has risen to the pressure in the discharge chamber 115 or more.
[0017]
2. When stopping the compression mechanism 110 during operation of the engine, the solenoid valve 152 is opened. Thus, rises to the suction chamber 114 for the discharge chamber 115 are communicated, the pressure in the discharge chamber 115 is equal to the pressure in the suction chamber 114, suction pressure or is compressed refrigerant in the working chamber V _C However, the check valve 154 is always open.
[0018]
Accordingly, refrigerant sucked into the working chamber _{V C} from the suction chamber 114, second communication passage 153, through the discharge chamber 115 and the first communication passage 151 flows back to the suction chamber 114. Therefore, the refrigerant is not discharged from the compressor 100 and circulates in the compressor 100, so that when viewed from the condenser side, the compressor 100 is in a stopped state.
[0019]
As described above, in this embodiment, the variable discharge capacity mechanism 150 that changes the amount of refrigerant discharged from the compressor 100 by the solenoid valve 152, the first and second communication paths 151 and 153, and the check valve 154. Is composed.
3. When the compression mechanism 110 is operated by the electric motor unit 130, the electric motor unit 130 (stator 131) is energized with the electromagnetic valve 152 closed, and the movable scroll 11 2 (shaft 102) is rotationally driven.
[0020]
Next, features of the present embodiment will be described.
By transmitting the rotational force from the engine to the shaft 102 via the first one-way clutch 120, the electromagnetic clutch can be eliminated as described above. Therefore, since the configuration of the composite compression device can be simplified, the manufacturing cost of the composite compression device can be reduced.
[0021]
Further, in general, a one-way clutch can transmit a small and large rotational force, so that it is possible to prevent an increase in the size of the composite compression device.
(2nd Embodiment)
In the above-described embodiment, the rotor 132 of the electric motor unit 130 and the shaft 102 are integrated, but in the present embodiment, as shown in FIG. A second one-way clutch 160 having a structure equal to 120 is provided.
[0022]
Note that the direction in which the second one-way clutch 160 can transmit the rotational force coincides with the movable direction of the movable scroll 112, as in the first one-way clutch 120. Therefore, when the rotor 132 rotates in the movable direction of the movable scroll 112, the shaft 102 always rotates. As a result, the rotor 132 does not rotate when the compression mechanism 110 (movable scroll 11 2 ) is driven by the engine, so that the rotational force transmitted from the engine is consumed for unnecessary work other than operating the compression mechanism 110. Can be prevented. As a result, the fuel consumption rate of the engine can be improved.

[0023]
Further, since induced electromotive force is induced in the stator 131 as the rotor 132 rotates, the stator 131 can be prevented from generating heat, so that the durability of the electric motor unit 130 can be improved.
By the way, in the above-described embodiment, a scroll-type compression mechanism is employed as the compression mechanism. However, the present invention is not limited to this. For example, as shown in FIG. A compression mechanism may be employed.
[0024]
As a variable discharge capacity mechanism in the swash plate type compression mechanism, as is well known, a mechanism that controls the pressure in the swash plate chamber 171 to change the angle of the swash plate 170 to change the discharge capacity. Is desirable.
In the above-described embodiment, the solenoid valve 151 is simply turned on and off in accordance with the operating state of the engine. Alternatively, the discharge capacity may be arbitrarily changed by duty control of the solenoid valve 151.
[0025]
Further, the two one-way clutches 120 and 160 are not limited to the roller type, but may be a sprag type one-way clutch.
In the present specification, for example, “the second one-way clutch 160 is provided between the rotor 132 and the shaft 102” means that the second one-way clutch 160 This means that the one-way clutch 160 is provided, and does not mean only the case where the one-way clutch 160 is physically provided between the rotor 132 and the shaft 102 as in the second embodiment.
[0026]
Similarly, the first one-way clutch 120 only needs to be disposed in the middle of the transmission path of the rotational force from the pulley 103 to the shaft 102, and the first one-way clutch 120 is not necessarily physically connected between the pulley 103 and the shaft 102. It does not mean only the case where it is arranged in between.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a composite compressor according to a first embodiment.
FIG. 2 is a schematic view of a one-way clutch.
FIG. 3 is a sectional view of a composite compressor according to a second embodiment.
FIG. 4 is a sectional view of a composite compressor according to a modification of the present invention.
[Explanation of symbols]
101: housing, 110: compression mechanism, 120: first one-way clutch,
130: electric motor unit, 160: second one-way clutch.

Claims (3)

A housing (101);
A compression mechanism (110) configured to have a fixed part (111) fixed to the housing (101) and a movable part (112) displaced with respect to the fixed part (111), and to suck and compress a fluid; When,
A shaft (102) rotatably disposed in the housing (101) and driving the movable portion (112);
A first one-way clutch (120) that transmits only one-way rotational force to the shaft (102) among rotational forces transmitted from an external drive source to the shaft (102);
An electric motor unit (130) that rotationally drives the shaft (102);
A variable discharge capacity mechanism (150) for changing the amount of fluid discharged from the compression mechanism (110);
A pulley (103) disposed outside the housing (101) and receiving a rotational force transmitted from the external drive source;
The first one-way clutch (120) is disposed between the pulley (103) and the shaft (102) while being housed in the pulley (103) ,
The variable discharge capacity mechanism (150) discharges the fluid from the compression mechanism (110) when stopping the compression mechanism (110) while the shaft (102) is driving the movable part (112). A composite type compression apparatus characterized in that the amount of fluid discharged from the compression mechanism (110) is changed so as not to be performed. The electric motor unit (130) has a rotor (132) rotating at the housing (1 01) fixed stator (131) and said stator (131),
A second one-way clutch for transmitting only one-way rotational force to the shaft (102) from the rotational force transmitted from the rotor (132) between the rotor (132) and the shaft (102); The composite compression device according to claim 1, wherein (160) is provided. The compression mechanism (110) and the electric motor section (130) are partitioned by a partition wall disposed therebetween, and the fluid in the compression mechanism (110) is transmitted to the electric motor section (130) by the partition wall. The composite compression device according to claim 1 or 2, wherein entry is prevented.

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