JPS61175295A - Rotary compressor - Google Patents

Abstract

PURPOSE:To vary the capacity easily with correspondence to the load by providing a blade control means comprised of a permanent magnet and an electromagnet for reciprocating the blade radially against a roller and varying the delivery of compressing section. CONSTITUTION:A blade control means for reciprocating a blade 14 radially against a roller 12 and varying the delivery capacity of compressing section is provided. It is comprised of a permanent magnet 15 provided at the end of backface of blade 14, an electromagnet 16 provided at the cylinder 7 side while facing against said magnet 15 to attract/repell said magnet 15 thus to reciprocate the blade 14 radially against the roller 12 and a control unit 18 for controlling switching of magnetic pole of the electromagnet 16. With such arrangement, the blade 14 can be reciprocated with correspondence to the load to vary the delivery capacity, thereby the capacity of compressor can be varied easily in stepless while the reliability is improved and the cost is reduced when compared with inverter system.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a rotary system used in an air conditioner, etc., and particularly relates to a blade that partitions a cylinder chamber into a compression section, a suction section, etc. under load. Accordingly, the partitions were opened and closed 1i by moving 1 as appropriate, thereby changing the capacity by 1 [Relating to a cotery compressor].

1. Technical Background of the Invention 1. Problems] A conventional rotary compressor is constructed as shown in FIG.

In the figure, reference numeral 1 denotes a closed case, in which an electric element 2 is provided in the upper part, and a compression element 4 driven by a rotating shaft 3 of the electric element 2 is provided in the lower part.

The electric element 2 consists of a stake 5 fixed to the closed case 1 and a lever 6 fixed to the rotating shaft 3.

As shown in FIG. 3, the compression element 4 is fixed to the sealed case 1 and is provided below the cylinder 8 that forms and covers the cylinder chamber 7, and the crank '8, which partitions the cylinder chamber 7 and rotates. A main bearing 9 and a sub-bearing 10 supporting the shaft 3,
A roller 12 that fits into the crank portion 11 of the rotating shaft 3 and slides on the inner peripheral surface of the cylinder chamber 7 of the cylinder 8;
The blade 14 is movably movable at 117 and partitions the cylinder chamber 7, which is in contact with the roller 12 with a spring 13, into a compression side and a suction side. .

In addition, in FIG. 3, 19 is a suction hole, and 20 is a discharge hole.

By the way, the following method has conventionally been adopted as a method for varying the capacity of this rotary complete tree.

■Gas Bypass Method This is a method in which a portion of the refrigerant discharged from the compressor is returned to the suction side of the compressor.

■ Overnight pole number conversion method This method 1. By switching the number of poles of the motor, which is an electric element, the number of revolutions is changed.

■ Method for imparking In this method, the frequency of the power source that drives the motor is continuously changed using an inverter, and the rotation of the brake sensor is changed to prevent it from following this change. 1 As above, methods ■ and ■ (l: J5) had the disadvantage that it could only be performed in stages and there was a limit to lζ control depending on the load. Although this is preferable for control according to the load, it has the problem of being expensive.

[Object 1 of the Invention] The present invention has been made in consideration of the above circumstances, and the object of the present invention is to provide a low-cost low-cleaning compressor 4-no, which is inexpensive, and whose capacity can be easily varied according to the load. This provides a controllable rotary compressor.

[Summary of the Invention] In order to achieve the above object, the present invention provides a rotary compressor including a cylinder, a roller that slides on the inner circumferential surface of a cylinder chamber formed in the cylinder A, and a cylinder that is in contact with the roller. A blade for partitioning a chamber into a compression section and a suction section, and a blade control means for variably controlling the discharge capacity from the compression section by reciprocating the blade in the radial direction with respect to the roller. The blades are moved back and forth according to the load on the blade control means to vary the capacity of the combrella.

[Embodiments of the Invention] Hereinafter, preferred embodiments of the []-Tally] combbrella according to the present invention~
Examples are explained below based on the attached drawings.

FIG. 1 shows a plan cross-sectional view of a compression element constituting a rotary compressor, and shows a cylinder 8 fixed to a sealed case 1 and forming a cylinder chamber 7, and a rotating shaft 3, as in the conventional case.
The cylinder chamber 7 of the cylinder 8 is fitted into the crank part 11 of the cylinder 8.
It mainly consists of rollers 12 that slide on the inner circumferential surface of the roller.

In particular, the IJj feature of the present invention is that the blade 14 that partitions the cylinder chamber 7 into a compression section and a suction section is
- A blade control means is provided for variably controlling the discharge capacity from the compression section by reciprocating the blade 12 in the radial direction.

In this embodiment, this control means is provided with a permanent magnet 15 provided on the back side end 14b of the blade 1/I, and provided on the cylinder side opposite to this permanent magnet 15, and is configured to attract or attract the permanent magnet. Electromagnet 16 for reciprocating the blade 1/l in the radial direction with respect to the roller 12
and a control device 18 that controls the magnetic pole switching of this electromagnet.
It is composed of.

Next, the effect will be explained.

When the compressor is started, the control device 18 simultaneously energizes the electromagnet 16 for several seconds.

At this time, for example, the electromagnet side 15a of the permanent magnet 15 is set to N 1
ffi raised platform, blade side 178 of iron core 17 (this N
By generating a pole, the 11 nodes 14 are repelled to the roller 12 side to avoid contact between the roller 12 and the tip 1zla of the blade 14, thereby preventing compression. When the pressure on the discharge side is increased by 1J, the back pressure of the blade 1/I is added, and the blade 14 automatically (follows the roller 12), so the electromagnet 16 is no longer energized. stop.

When the load decreases as the operation progresses, the operation of the blade 14 is controlled as follows to prevent compression from occurring.
This allows you to change your abilities.

The control device 18 energizes the electromagnet 16 to generate an S pole on the blade side ``17a'' of the iron core 17, whereby the blade 14 is attracted to the iron core 17 and the tip 14a of the blade 1/4 is scraped off the roller 12.

As a result, the sucked gas is not compressed and only circulates within the sink 8, and the gas is not discharged.

In particular, in the present invention, depending on the load situation,
In other words, the blade 14 is controlled by the control device 18 so that the gas is not compressed and the blade 14 is accurately rotated 4r.

-) Mari,]] During the operation of the Prairie, the discharge capacity at - also changes in proportion to the amount of increase/decrease in load.

It should be noted that when the tip 1/Ia of the blade 1/l is away from the roller 12, when the load increases, the electric current I! Ill? ': Node side 1 of iron core 17 of i1G
7a to the north pole again to repel the blade 14, and bring the tip 14a of the blade into contact with the roller 12.

Let the sea urchins compress again.

However, in this case, when the tip end 14a of the blade 14 and the outer periphery of the roller 12 come into contact, they will seal against each other, which may cause abnormal noise and other wear.
The control device detects the rotation angle of the motor or roller, and when the roller reaches the top dead center of the compression process (around the completion of 1F compression), it energizes the electromagnetic Z116 to switch the magnetic pole, and then ,
Blade 1/'l works to follow loan 12,
.

Further, although details are given in Section 2, the means for moving the flade back and forth at t1 and increasing the force V does not need to be limited to the method using the repulsion and attraction of the magnet shown in this embodiment.

[Effects of the Invention] As described above, the present invention provides blade control means for reciprocating the blade in the radial direction with respect to the roller according to the load at the blade node that partitions the cylinder chamber into the compression section and the suction section. Since we have set up the following (summer effect).

(1) Since the blade is reciprocated and the discharge rate is changed according to the load, the power saw of the compressor can be changed steplessly.

(2) Compared to an inverter that controls the rotation speed to vary the capacity, although the present invention is mechanically controlled, the movable parts are the same as the basic structure of the rotary compression tree. , more reliable than inverter method
1. (I'm worried about this.Especially with the inverter method,
Higher speed] -1 causes problems such as wear and vibration, and d3 is superior in this respect.

(3) Considering inverter efficiency (approximately 90%),
Since the present invention does not require an inverter power source for the combiner 4, it can be provided at low cost and also contributes to energy saving.

(/l) Since there is no need for a spring to bias the blade, there is no risk of breakage, and reliability is improved.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view showing an embodiment of a compression element constituting a rotary combination tree according to the present invention, FIG. 2 is a side sectional view showing a conventional rotary compression tree, and FIG. FIG. 3 is a plan cross-sectional view of a compression element constituting the compression tree. In the figure, 7 is a cylinder chamber, 8 is a cylinder, 12 is a harrow roller,
1/ll;j, freight, 15 kl: permanent 181
? T and 1G are electromagnets, 17 is an iron core, and 18 is a control device.

Claims (3)

[Claims] (1) A cylinder, a roller that slides on the inner circumferential surface of a cylinder chamber formed in the cylinder, a blade that comes into contact with the roller and partitions the cylinder chamber into a compression section and a suction section, and a blade that connects the blade to the roller. and blade control means for variably controlling the discharge capacity from the compression section by moving the blades back and forth in the radial direction. (2) The blade control means includes a permanent magnet provided on the back side of the blade, and is provided opposite to the permanent magnet, and attracts or repulses the permanent magnet to move the blade in a radial direction relative to the roller. The rotary compressor according to claim 1, comprising an electromagnet for reciprocating the compressor. (3) The rotary compressor according to claim 1, wherein the blade control means is configured to detect the rotation angle of the drive motor and thereby move the blade near the top dead center of the roller.