JPS5830499A - Rotary compressor - Google Patents

Abstract

PURPOSE:To reduce the starting torque by constituting a solenoid satisfying a specific equation on the relationship between the spring force of the solenoid and the sum of the back pressure of a vane and the vane spring force so that the vane can be continuously held even when the solenoid voltage is zero. CONSTITUTION:A solenoid 9 is constituted so that an equation F1<muF2 is satisfied on the relationship between the spring 14 force F1 of the solenoid 9 and the sum of the back pressure of a vane 2 and the vane spring 5 force (where, mu is the coefficient of friction on the contact surface between the groove of the vane 2 and a pin 15). By constituting the solenoid 9 in this way, a movable iron core 13 can be prevented from moving due to the friction force between the pin 15 and the groove 26 even after the solenoid has been de-energized. Therefore, even if a relay 34 is made OFF 1,100msec after the time 39 when a compressor switch is turned OFF and the solenoid voltage 42 is dropped to zero, for instance, the pin 15 keeps to hold the vane 2 without returning to the right in the figure. Accordingly, the inside of a cylinder 1 is not partitioned into a high pressure side 23 and a low pressure side 24 by the vane 2, thus the starting torque can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary compressor, and particularly relates to a rotary compressor that implements total control IIl by vane control, aiming at reducing starting torque.

Rotary compressors are widely used as refrigerant compressors in refrigeration cycles, such as air conditioners.
Recently, there has been a strong demand for reducing the power consumption of air conditioning machines throughout the year.

In order to meet this demand, a method has been implemented in which the capacity of the rotary compressor is controlled according to the load to save power.

Conventionally, a method of controlling vanes has been known as a capacity control method for a rotary compressor.

Figure 1 is for explaining the capacity control method of a conventional rotary compressor using vane control. Partial sectional view (FIG. 1) is a main part sectional view showing a state in which the vane is held.

In this FIG. 1, 1 is a cylinder of a rotary compressor 27, 3 is a roller rotating inside the cylinder 1, 4 is fixed to the shaft end of a compressor motor (not shown), and a roller 3 is fixed to the shaft end of a compressor motor (not shown).
The crank 2 that rotates the cylinder 1 is a vane that partitions the inside of the cylinder 1 into a high pressure side 23 and a low pressure side 24 and slides vertically while contacting the roller 3.
#926 is provided on the side. 5 is b72
a vane spring that applies force to the upper end and presses the vane 2 against the roller 3; 8, a suction port provided in the cylinder 1; 7, a discharge valve provided in the discharge port 6 of the cylinder 1; 9;
25 is a chamber in which a rotary compressor 27 is housed.

Reference numeral 16 denotes a power source that energizes the coil 11 of the solenoid 9 and controls the movement of the movable iron core 13. This power source 16 is connected to a rectifier circuit 17 that energizes the coil 11 with direct current, and an indoor hot water temperature setting device 18. The DC voltage obtained from the indoor width detector 19 and the outdoor altitude detector 20 is used to calculate the capacity control rate using the capacity control rate circuit 21 and the rectifier circuit 17. and a switching circuit 22 for applying pulses to the coil 11 of the solenoid 9 according to the rate.

To explain the details of the solenoid 9 described above, 10 is the frame of the solenoid 9, 11iJ:, and J is housed in the frame 10, and both of its brocades 1 are connected to the switching circuit 22 of the T insulator 16. 12 is a fixed iron core, 13 is a movable iron core with a bin 15 attached to its tip, 14i1, frame 10 and movable iron core 13;
This is a spring inserted between the spring seat 1:1a provided in the spring seat 1:1a.

In the conventional rotary compressor configured as described above, during compression operation, as shown in FIG. 1(a),
The vane 2 is pushed by a vane spring 5 so as to come into contact with the roller 3, and the inside of the cylinder 1 is partitioned into a high pressure side 23 and a low pressure side 24. When the crank 4 rotates in the direction of the arrow, the bay 72 can slide vertically, and the low pressure side 24 has a large volume and sucks gas from the suction port 8. On the other hand, high pressure (11123 is crank 4
As the gas rotates, the volume thereof becomes smaller, so that the gas therein is compressed, and when the pressure exceeds the pressure inside the chamber 25, the gas flows through the discharge port 6, pushes up the discharge valve 7, and flows out into the chamber 25.

During capacity control operation, the vane 2 is held as shown in FIG. 1(b).

The method for holding the base 72 is that when the coil 11 of the solenoid 9 is energized (the energization method related to the capacity control method will be described later), the movable iron core 13 is attracted to the fixed iron core 12,
Move to the left from the state in Figure 1 (a) (Figure 1 (1))
In this state, the bottle 15 attached to the tip of the movable iron core 13 does not return downward even when the blade 2 of the vane 2 is pushed by the spring 5, and the inside of the eight cylinders is partitioned by the bee 72. Therefore, even if the roller 3 rotates, the volume inside the cylinder does not change, and no compression action is performed.

The method of controlling activity will be explained using Figure 2.3 [IJ1].

Figure 2 shows the so1/noid flilJ in Figure 1.
(A time chart diagram showing the L pattern, Figure 3, Figure 1 showing the movement of the rotary iron core due to energization of the solenoid and r-drive in Figure 1, and the positional relationship of the bottle, vane, and groove of the vane. FIG.

First, the indoor width setting device 18. Based on the signals obtained from the indoor width detector 19 and the outdoor altitude detector 20, a capacity control rate calculation circuit 21 calculates the capacity control rate. When the welfare control rate obtained in this way is α, the switching circuit 2
2, the DC voltage obtained from the rectifier circuit 17 is switched to a pulsed voltage with the relationship α=τ1/(τ, 10τ2), where τ1: uncompressed period τ2 = compressed period, as shown in FIG. Then, this pulsed voltage is applied to the coil 1 of the solenoid 9.

By the way, bottle 15. Vane 2. The positional relationship of the grooves 26 is as follows.

That is, even when the page 72 is at the lowest position, the bottle 15 remains in a position where it can contact the vane 2, as shown in FIG. When the upper end of the groove 26 reaches the position shown in FIG. 3(C),
It is located 61 points above the top end of the bottle 15. At this time, the lower end of the groove 26 is located below the lower end of the tip of the bottle 15 ε2.

Here, when a voltage is applied to the coil 11 of the solenoid 9 at an arbitrary time, the movable iron core 13 of the solenoid 9 moves to the left as shown in FIG.
5 comes into contact with the vane 2. When the roller 3 rotates roughly and reaches the top dead center (point P in FIG. 3(a)), the vane 2 is lifted by the roller 3, and the tip of the bottle 15 is aligned with the groove of the bee 72. Fits in 26. Furthermore, roller 3. When the cylinder 1 rotates and reaches the position shown in FIG. 3(d), the vane 2 is held by the bottle 15, so the inside of the cylinder 1 is not partitioned by the vane 2 and no compression action is performed.

On the other hand, the voltage to the coil 11 of the solenoid 9 is cut off, and the second
When entering the compression period τ2 shown in the figure, the force F1 of the spring 14 of the solenoid 9 becomes the sum F2 of the back pressure of the vane 2 and the force of the vane spring 5.
and the coefficient of friction μ between the groove 26 of the vane 2 and the contact surface of the bottle 15
If the product μF is larger, i.e. Fl〉μI, +
In case 2, the bottle 15 immediately moves to the right due to the force of the spring 14, the vane 2 is released from its holding state, is pushed by the vane spring 5, comes into contact with the roller 3, and the compression operation is performed [j
Become J-Noh. In the case of Fl<μF, when the state shown in FIG. When they come into contact, compression operation becomes possible.

As described above, compression is achieved by applying the pulsed voltage shown in FIG. 2 to the solenoid 9.

By repeating the non-compressing operation, it is possible to control the capacity of the rotary compressor. Then, when the temperature of the outside air changes and the cooling/heating load is eliminated or the need for cooling/heating is eliminated, the compressor switch (not shown) is turned off and the rotary compressor 27 is stopped.

However, in the above-mentioned conventional technology, the state of the solenoid 9 (
That is, since the rotary compressor 27 stops regardless of whether voltage is applied or not, for example, if the rotary compressor 27 stops while the solenoid 9 is not energized, the vane 2
The inside of the cylinder is connected to the high pressure side 23 and the abrasive female ll-'b#-1
= It becomes a state where it is partitioned into the low pressure side 24, and the starting torque increases at the time of the next start.

Therefore, since starting is impossible with a capacitor motor, conventionally the rotary compressor 27 has been driven by a compressor motor (not shown) equipped with a starting device including a starting capacitor. Not only is the compressor expensive, but it also has the disadvantage of consuming a lot of power during startup.

The present invention eliminates the drawbacks of the prior art described above and provides a rotary compressor that can be started with a capacitor motor by reducing the starting torque, is inexpensive, and consumes less power during starting. Its purpose is to

The features of the present invention include at least a cylinder, a roller (9) that rotates inside the cylinder, and a roller that slides vertically while in contact with the self-rolling roller that partitions the inside of the cylinder into a high pressure side and a low pressure side. 1111 The vane can be held by fitting the vane provided with the groove Th and the bottle provided at the tip of the vane into the groove of the vane.
In an α-Tary type positive compressor having a J moving iron core, a solenoid equipped with a return means for the moving iron core, and a power source for controlling the movement of the moving iron core, the solenoid is energized. A control circuit for stopping the compressor is provided that can cut off the power to the solenoid after the compressor input is turned off and the AtJ roller has completely stopped.
Even after the power to the solenoid is cut off, the movable iron core is prevented from moving due to the frictional force between the bottle and the groove, and the tip of the persimmon bottle is held in the groove. The rotary compressor has a return means for the movable iron core as described above.

The present invention will be explained below with reference to Examples.

FIG. 4 is a sectional view of a main part of a rotary compressor according to an embodiment of the present invention, FIG. 5 is a circuit diagram of the (10) compressor stop control circuit in FIG. 4, and FIG. 6 is a time chart showing a control pattern of the compressor stop control circuit according to FIG. 5. FIG.

In FIGS. 4 and 5, parts with the same numbers as in FIG. 1 are the same parts. 38 is a compressor stop control circuit that can turn off the compressor input after energizing the solenoid 9, and then turn off the energization to the solenoid 9 after the roller 4 has completely stopped. , as shown in FIG.

That is, in this FIG. 5, 28 is a compressor switch, 29 is a monostable multivibrator that generates A/Sumi pressure for 1100 mSOc when the compressor switch 28 changes from ON to OFF, and 3° is: A monostable multivibrator 31 generates a pulse voltage for lQQmllf3c when the compressor switch 28 changes from ON to OFF.
, 32 and 33 are amplifying transistors, 34 and 35 are relays, 36 is a rectifier circuit, and 37 is a compressor motor.

Also, the force F of the spring 14 of the solenoid 9, and the vane 2
(11) between the back pressure of F and the sum of the forces of the spring 5 and the force of the spring 5, equation (11) is established so that the following relationship holds true.

F"l<μF, where μ: coefficient of friction between the contact surfaces of the groove 26 of the vane 2 and the bottle 15. If the solenoid 9 is configured in this way, even after the solenoid 9 is de-energized, the friction between the bottle 15 and the groove 26 will remain constant. The movement of the movable iron core 13 can be prevented by the frictional force between the movable iron core 13 and the movable iron core 13.

The operation of this embodiment configured as described above will be explained.

When the compressor switch 28 is in the ON state, the power rectified by the rectifier circuit 36 is energized to the amplification transistor 32, and the relay 35 is in the ON state. Therefore, AClooV is supplied to the compressor motor 37,
The rotary compressor 27 continues to operate.

Next, if the compressor switch 28 is set to OFIi', the power to the amplification transistor 32 is 0FFKk, but the amplification transistor 33 is turned off from the monostable multivibrator 3o.
Since 1QQ+n5ec is energized, the pressure (12) is 100 m (6
) After that, the relay 35 is turned OFF and the compressor input is cut off. After that, due to inertia, the rotary compressor 27 continues to operate for a while (approximately 1 hour after the compressor switch 28 is turned off).
After rotating for 1000 m and 1000 m, the roller 4 completely stops.

On the other hand, after setting the compressor switch 28 to 011F, the monostable multi-pie break 29 is set to 1100ffH1eo.
In order to communicate with the amplification transistor 31 during this time, the relay 34 is turned off after turning off the compressor switch 28.
It remains ON for 00mS□, and the switching circuit 2
2, the solenoid 9 is energized from the rectifier circuit 17.

” The control pattern of the compressor stop control circuit 38 is as follows.
The result will be as shown in the figure.

In this FIG. 6, 39 is a compressor switch 01i'
At time F, 40 is compressor voltage, 41 is compressor rotation speed, 4
2 is the solenoid voltage.

When the compressor switch 28 is set to OF Ii', the solenoid voltage 42 is immediately energized to the solenoid 9, and (13
) If the pin 15 provided on the movable iron core 13 and the groove 26 of the base/2 are in contact, this state will be maintained, and if they are not in contact, i
Move the J moving iron core 13 to the left (Fig. 4)! When the blade 72 reaches near the second dead center as the crank 4 rotates, the tip of the bottle 15 enters the groove 26 of the vane 2 and holds the vane 2. In this state, the compressor switch is turned OFF at point 3.
Compressor voltage 40 becomes O after 9 to 100 mm, but due to inertia, it is about 1 from 39 when the compressor switch is OFF.
At 418 after 000100O, the E compressor rotation speed 41 becomes 0 (roller 3 stops). Then, when the compressor switch OIi'F changes from 39 to 1100m8eAX1, the relay 34 changes to OJ''F, and the solenoid voltage changes to 42.
becomes 0.

However, as mentioned above, since there is a relationship between F and μF, even if the solenoid voltage 42 becomes 0, the bottle 15 does not return to the right (FIG. 4) and continues to hold the vane 2.

Therefore, the inside of the cylinder 1 is closed to the high pressure side 2 by the bay 72.
(14) When the rotary compressor 27 is next started, no compression work is required, and the torque at the time of starting can be reduced.

In addition, in the above embodiment, when the roller 3 stops (
41 a in Fig. 6), if the roller 3 has just reached the top dead center (the position shown in Fig. 3 (C)), the pin 15 is not in contact with the groove 26 of the vane 2, so after that the solenoid voltage 4
When 2 becomes O, the movable iron core 13 returns to the right (FIG. 4). However, in this first case, the roller 3 is pushed downward by the vane spring 5 via the vane 2 and rotates, so the above-mentioned The bee 72 can be held because it almost never stops completely at the position, but stops at the slightly shifted a) γ position.

As explained in detail above, according to the present invention, at least a cylinder, a roller rotating inside the cylinder, and a partition between the inside of the cylinder into a high pressure side and a low pressure side and vertically moving ( 15) A vane that slides and has a groove on its side surface, and a movable iron core that can hold the vane by fitting a ζ bottle at the tip of the vane into the groove of the vane. In the "J-tally type compression rock, which is equipped with a solenoid equipped with a return means for the core and a power source that controls the movement of the fiJ moving iron core, to the solenoid; i1
In addition to providing a control circuit for stopping the compressor, which can cut off the compressor power after one electric current and after the roller No. 11 has completely stopped, the communication to the solenoid No. iJ is cut off.
Even after the power to the solenoid is cut off, the movement of the movable iron core is blocked by the frictional force between the front bottle and the groove, and the tip of the bottle remains stuck in the groove. Since the return means for the movable iron core is constructed so that the movable iron core is maintained, the starting torque can be lowered and the condenser motor can be used for starting, resulting in low cost and low power consumption during starting. A rotary compressor can be provided.

[Brief explanation of the drawing]

FIG. 1 is for explaining a sub-method of capacity control using vane (16) control for a conventional rotary compressor.
FIG. 1(a) is a sectional view of the main part showing a state in which the holding operation of the vane is released, FIG. 1(b) is a sectional view of the main part showing the state in which the vane is held, and FIG. Figure 033, a time chart diagram showing the control pattern of the solenoid in Figure 1, shows the movement of the movable iron core as the solenoid is energized in Figure 1, and the bottle. Main part sectional view showing the positional relationship of the vane and the groove of the vane, 4th
5 is a circuit diagram of a control circuit for stopping the compressor in FIG. 4, and FIG. 6 is a sectional view of a main part of a rotary compressor according to an embodiment of the present invention. It is a time chart figure which shows the control pattern of the control circuit for a compressor stop. 1...Cylinder, 2...Vane, 3...Roller,
9...Solenoid, 13...Movable iron core, 15...
Bin, 16...Power supply, 23...High voltage side, 24...
Low pressure side, 26...Groove, 27...Rotary compressor,
38...Compressor stop control circuit. Agent: Patent attorney Kosaku Fukuda (and 1 other person) (17)

Claims (1)

[Claims] 1. At least a cylinder, a roller that rotates in this cylinder M, and a vane that partitions the inside of the cylinder into a high-pressure side and a low-pressure side, slides vertically while contacting the roller, and has a groove on its side surface; The vane has a movable iron core capable of holding the vane by fitting a bottle provided at its tip into the groove of the vane, and a solenoid equipped with a return means for the movable iron core; In a rotary compressor equipped with a power source for controlling the movement of the core, turn off the compressor input after energizing the solenoid, and turn off the energization to the solenoid after the roller has completely stopped. A control circuit for stopping the compressor is provided, and even after the passage RL to the solenoid is cut off, the movement of the movable iron core is prevented by the frictional force between the bottle and the groove, and the movement of the movable iron core is prevented. A rotary compressor characterized in that the return means for the movable iron core is configured so that the tip end is held in the groove.