JPS5872690A - Variable capacity compressor - Google Patents

Abstract

PURPOSE:To provide a compressor with multi-selectable capacity for high, low- load operation and starting, by furnishing a spool valve which is to open and close two by-pass ports in communication with the working space and suction pressure chamber. CONSTITUTION:If a solenoid valve 6 is not supplied with power, a valve 6 opens spool valves 42, 52 in order to shut the discharge pressure groove 35 from the control pressure chamber 34, when the capacity of compressor with become approx. 20%. When current is applied to this solenoid valve 6, the groove 35 is put in communication with the chamber 34 to close the spool valves 42, 52, when the capacity of compressor will become approx. 100%. In case current is applied to the solenoid valve 6 intermittently, the ports 41 and 51 can be opened and closed, respectively, to provide a compressor capacity of approx. 60%.

Description

[Detailed description of the invention] The present invention is the sweet capacity Punprena KMI Sui.

The present invention's spring-loaded pretuna is used, for example, as a vane lamp pretuna for automotive turf systems.

Firstly, the automobile Tartuo Tsunpretsut is driven by an electromagnetic clutch from an engineering/engineering Kutsunkupuda, and the rotation speed of the compressor can be used in a wide range from 700 to 6000.
4. However, the capacity of the rich Grena is set mainly to satisfy a sufficient cooling load when the rotation speed is low, and therefore the cooling capacity may become excessive when the rotation speed is high or when the food load is low. Excessive cooling capacity absorbs the drop in air pressure, increases compression ratio, lowers air efficiency, and worsens automobile fuel efficiency. Therefore, conventionally, in the automobile Kutsuo O:lump V Tuna, car 1! The electromagnetic clutch is turned on and off by detecting temperature, etc. to perform operation commensurate with the cooling load. There is a turning point where this occurs and the driving efficiency deteriorates. Nine, when Lambretsuna is started, the electromagnetic tatutte is subjected to a step-like driving load, and the electromagnetic tatutte is required to have a much greater capacity in terms of power transmission capacity and quantity during normal operation, and is 1IIll1 point is 6゜ because it is necessary to use a very hot electromagnetic clutch.

The present invention is based on the above-mentioned problems in the conventional method.
Based on the idea of reducing the number of on/off cycles of the electromagnetic clutch by reducing the number of on/off cycles of the electromagnetic clutch, we reduced the number of on/off cycles of the electromagnetic clutch. The aim is to reduce the step-like drive load that is applied, make it possible to reduce the weight of the electromagnetic clutch, and improve the feeling of continuous rotation.

In the present invention, a vane, a liner, a vane, a liner, and a liner formed within one night and slidable within nine meshes are provided.
In a compressor having a side gray F1 and a cough side gray F1 which sandwich and form an operating space, a suction royal chamber, and a housing which forms a discharge pressure chamber, a housing is provided in the side gray F1 that surrounds the suction royal chamber. A stone 20 bypass port that communicates the working space with the suction pressure chamber, a spool valve that connects the bypass port, and two types of strong and weak springs that apply a load in the direction in which the spool pulp opens the bypass port. , a solenoid pulp provided between a passage communicating between the discharge pressure chamber and the V end of the shell spool pulp, and a control circuit for supplying a control signal to the solenoid valve. is provided.

The configuration of a variable capacity compressor as an embodiment of the present invention is shown in FIGS. 1 and 2. #I2 figure is If of figure 1
-iI41 is a sectional view.

11 is a drive shaft/taper, 12 is a four-taper 110
15 is a vane that penetrates the center of the rotation and is freely reciprocated in the radial direction; 15 is a liner made of a special surface that allows both tips of the vane 120 to be in sliding contact at all times as the rotor 11 rotates through 1110 rotations; 14 is a liner that connects the rotor 11 through a bearing 24; Support the bracket 12
Sliding side grate on the drive side, 15mm
b
This is the rear side grate. 21 is the front housing, W-1110 drive gear 7 part 22 and shaft sealing device 2! It is fixed to the drive-side side grate 14 via the drive side grate 14, and is used for an electromagnetic clutch (not shown). 25 is a rear housing having a discharge pulp 39, a rotor 11, a liner 15, a sear 411? The high pressure chamber 56 is fixed to the drive side side grate 14 so as to wrap around the side plate 15.
Configure.

37 and 171 are a discharge valve and a valve stopper, which are fixed to the liner 15. The variable capacity gompressor K shown in FIG. 1 is provided with two bypass ports 41 and 51.

The variable passenger horn gray ROS2 grena portion C shown in FIG.
A solenoid pulp 6 receives an electric signal to open and close the solenoid pulp 5, and a solenoid pulp 6 which is inserted into the side plate 14 and can reciprocate within the guide 44. Beau) 41.5
1 openable/closeable spools 42, 52, spool 42°5
Suzulinda 45.5 to add load to 2! S, and the spool 42.5204 surface KW introduces the pressure of the pressure chamber 55; the pressure groove S8 is provided. 51 is inhalation pulp, I! ! #'i A comb that guides the pumped quasi-medium into the working space.
The port, s2, is the pressure chamber. The spool guide, spool, and spring are spool guides 44, 54 between one stage and two stages, and spool 42.5, respectively.
2, and tin cylinders 43 and 5 are provided at two locations each, and both spools 42 and 52 have Sundl pressure chambers S4.
9, the load of the tin cylinder 43 is transferred to the spring 5.
It has a large II value compared to the load of 6.

The basic operation of the variable capacity compressor shown in Fig. 1 is shown in Fig. 5 (g
) (h) is used to explain this. If normal capacity adjustment is not performed, the bypass ports 41 and 51 that communicate the working space of the funprena and the suction chamber are both Kl'! Under normal conditions, the Tsunpref f'O capacity is 9 when the base comes to the position shown by the broken line in Figure 5 (4).
It is composed of two vanes, the rotor 11, and the inner edge of the liner 15, and has the maximum volume.

Next, a case where capacity adjustment is performed will be explained. First, the fifth
In the state of 5!3(#), the bypass port 41°51
The bypass boat 41 of the 1st stage of 0 is open and communicates with the suction pressure chamber 55. As the refrigerant gas decreases, the refrigerant gas in this maximum volume flows out from the first stage bypass port 41 to the suction pressure chamber, and -<-712 becomes 0'°/<x.
Immediately after passing through the $-t 41, the middle point in FIG.

Next Kl! ! In state A of Fig. 5 (j), both the first stage 41 and the second stage 51 of the bypass port are open, and even if the enclosure board advances toward the direction of the arrow, the second stage - bypass port 5 remains open.
1, the refrigerant flows into the suction pressure chamber, and the vane 12 becomes 2Rr.
After passing through the bypass port 51 of A and moving (yi point tomb O
This results in a variable capacity of about 20 arcs in addition to the maximum capacity.

The operation of the discharge pressure groove 35, control pressure 'M54, bypass bow) 41, 510 of the variable spring amount 1 grena in FIG. 1 will be explained with reference to FIG. In FIG. 5, if the solenoid valve 6 is not energized, the solenoid valve is connected to the discharge pressure groove! In order to disconnect between the pressure WiS4 and the pressure WiS4, the pressure in the control chamber 34 becomes the suction pressure P in the suction pressure chamber 32, and the spool pulp 42.
Since the pressure is the same as the suction pressure P, the spool pulp is 42.52
Moving to the left in the diagram, lff1i and both second stage bypass bows) of 41.51 were released, resulting in a rumored spring amount of 20, just like O1 mentioned above. ;When the pump is started, it is always in the O state), so the drive load can be considerably smaller than in the case where the variable capacity is not used, making it possible to significantly downsize the electromagnetic touch.

On the other hand, when the solenoid valve 6 is constantly energized, the discharge pressure groove 55 and the control pressure chamber 34 are in communication and in good condition. μs
The load that presses the spool pulps 42 and 52 against the right flesh in the figure S is the spring 45.550 load. 52 is the first and second row) (
When the cooling load is large, sufficient cooling operation is performed.

Next, when the solenoid valve 4 is intermittently energized, the solenoid valve 6 intermittently communicates the discharge pressure groove P4 with the pressure chamber 34. ! ! 14 from the discharge pressure groove 155: 1y
) The spool pulp 42.520 flows further into the spool pressure chamber 54 and finally into the suction pressure chamber S2.
The pressure inside the main pressure chamber 34 is the discharge pressure Pd.
&, the suction pressure P becomes the pressure in the middle of 0.

At this time, a load of 450 is applied to the 1111th spool pulp 42; taking into consideration the operating conditions of the spool O, the pressure of the lunt and the suction pressure P, O is approximately 1.
When the pressure exceeds 0 atmospheric pressure, the spool pulp 42 closes the bypass boat 41 and generates a force as strong as a stone.
R1i spool pulp costs 52K Spucinda s50
By setting the differential pressure of the load to about 5 atm, the solenoid pulp 6KIIlir can be energized for one time in the range of 5 atm to 10 atm, depending on the degree of continuous energization of the solenoid pulp 6KIIlir, as shown in Fig. 4. Open bypass port 41,'
1sIo bypass board) 51 can be closed, and the capacity of the above-mentioned Odoto (60 bypass board) can be realized.

The configuration of the control circuit 70 in the compressor is shown in FIG. 114. 8 is! -The circuit starts operating when the two system O main switch is turned on. 501
,502. SO5 is configured to generate an ON signal when the temperature of Sol is below -, I#, l#sEX and 1 to 29, respectively. 11. I Yi, 1
The 1g power setting value is −1〉〉−8 and can be changed by the variable resistor 507. ★Z, Nah (meta one temperature 〒ii: MP is #.

If the voltage is higher than 41501, 502, and 503, transistor 513 is turned on at 15, and relay 514 is turned on. Dunnett touch 516 is activated, and the angles rotate simultaneously. This is transistor 5.
11,512 is off and solenoid pulp 4 is off.
At tt, Konopletuna will be operating at 100% capacity. Next, the f-t star temperature TIMP is -> T me M P
> Naruto in #10 state, comparison 11501 is off, 50
2 is on pS) Rungis 1512 is on and 1 is 9 and the m circuit 5150 on/off signal is the transistor 512
It is added to the F-Tungister 511 through the P-transistor 51.
1 repeats on-off in accordance with the above-mentioned power cycle IIs 15 (D signal. Therefore, the solenoid pulp 4 is in an intermittent state, and the pump play is in an operating state with a capacity of 60.

Furthermore, the lower Z star temperature Ttobi MP is jll>rxu
Since p>e and '&, both comparisons 41501 and 502 are off, so the transistor 511 is continuously on and 'f
When the solenoid pulp 6 is in a conductive state, the capacitance of the combretuna capacitance line 2o becomes t49. Naden Sume Temperature〒IM
P is 〒I M P <#.

At the ninth point, when the ratio *asoi turns off, the transistor 51s turns off and turns off the silage 514. In the rounding, %Y Dunnett Tatsu yf516 is cut; the rotation of the Ngrena stops.〇Figure 1 The operation of the entire tart system including the variable capacity compressor will be explained using FIGS. 6 and 117. In Figure 7, C is the variable capacity 17 Gretsuna part, 91 condensation-1?2 is the liquid receiver 1?3 is the expansion valve, and ? 4 is in order. Reference numeral 7 denotes a control circuit for controlling the solenoid pulp 6 of the variable evaporator pulp according to the present invention, which is configured to send an electric signal to the solenoid pulp in response to the temperature *o*t detected by the cooling air exiting the evaporator. ing.

At the time of starting the engine, the solenoid pulp 6 is in the OFF state, and the P:L grena is activated by turning on the electromagnetic lever 79 (not shown) based on the 2010J compressor customer volume and 1 as described above. Since the temperature TIMF of the cooling air in the starting position 110 is high, when the control circuit receives the calibration from the temperature needle and turns on the solenoid pulp 6, the Humpretuna CO capacity changes from 20 units → 40% → 100 units. However, the cooler system can provide a sufficient cooling effect.

100% O: The operation is carried out at the f grena spring amount, and soon the temperature is set in advance for the cooling air oi1 and the temperature reaches 9 temperature #1.
When the pressure drops below 1', the control circuit 7 sends a continuous signal to the solenoid pulp 6 so that the signal capacity increases from 100 to 60.
Changes into a flag. Since the cooling load at 0 o'clock is obtained by operating at 60% O of full grain capacity, it is lower than the cooling capacity and at 19 o'clock, the temperature of the cooling air is even lower. &J) #
2 Immediately, the solenoid pulp 6 expands and turns off, and the full planer capacity becomes 20%, which is 1. Then, the cooling air S
When the temperature exceeds 12, the umbrella and solenoid pulp 6 are in an intermittent state, and the operation is performed at a rate of 60%.

When the cooling capacity of a conbrella with a high cooling load of 10.49 m is insufficient, the temperature of the cooling air rises.
When it reaches 1, the control circuit turns on and the capacitance line becomes 100- again.

First, if the cooling load becomes very small relative to the cooling capacity, the temperature of the cooling air will be low at a density of 2 os, and the temperature of the cooling air will be below #1, and the electromagnetic power will turn off.
yS/ytl! Rolling stops (gon gray yt dice 0
(Sound) Then it becomes a toe. After stopping, when the temperature of the cooling air reaches or exceeds the rising temperature, the electromagnetic talatte is turned on again and 1) the pungrena capacity becomes 20% and is driven.

As mentioned above, the I-2 S/stem incorporating the variable capacity pump according to the present invention can always operate the feed stream in a nine-shaped condensation mode suitable for cold M food cargo.

Fig. 1 O variable capacity Elf y Luna uses a two-stage variable capacity configuration, 1st stage and 2nd stage, for the vanecon y%/tuna to handle electromagnetic power over a wide range of cooling loads and rotational speed ranges. Cooling operation is possible in a continuous state without touching OFF/ON, and the driving feeling and cooling feeling are good. Before, said 2RN10111
The amount of change is achieved by combining two single spool valves! Set the power level to 2R, and go to line 1 with solenoid valve 1.
, the number of components is small, and the addendum is relatively simple. 1*,
, it can greatly reduce the lambretsu capacity at the time of startup, the electromagnetic tactile ν only requires a small IIO%O, and it reduces the on-or cocoon, which is also advantageous in terms of durability. be.

In implementing the present invention, various modifications can be made to the above-mentioned embodiment. For example, in the above description, there are nine examples in which the passenger capacity control is performed by detecting the tartu system O evaporator outlet O cooling air temperature. 1. The same rotation speed of the compressor, etc., or a combination of these 0* may be used. 9. The operation of the solenoid pulp should be in the 00 range as in the above-mentioned O embodiment, and the discharge pressure groove should be closed when energized. It's coming out.

According to the present invention, in the operation of the responsible capacity compressor, the number of times the electromagnetic touch is turned on and off is reduced, the step-like drive load that acts during on and off is reduced, and it is possible to reduce the electromagnetic touch. At the same time, it can improve the driving feeling.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the variable quantity;
Figure 4 is a diagram showing the configuration of the control circuit in the device shown in Figure 1. Figures 6 and 7 are diagrams illustrating the overall operation of the Thaler system incorporating the device shown in Figure IIN. 14...Drive side side grate, 1s...
Rear side side plate, 21... Futakujinda, 22... Drive shaft portion, 2B... Shaft sealing device, 2
4...Bearing, 25...Rear housing, 52...
Suction pressure chamber, 34...con}4-^pressure chamber, '55...
Discharge pressure groove, 56...Discharge pressure chamber, 5A...Discharge valve, 5
71--Valve stopper, 58...Ro/Toll pressure 11,
41.51...Ha4 j J Ho-}, 42.52・
... Nuprindaparbu, 43.5! ···spring,
44.54-... Suguru guide, 508... Temperature needle, 6... Solenoid pulp, 7... Control circuit, 8...
...Main kit, 91...Condenser, 92...Liquid receiver,! 3... Expansion valve, 94... Evaporator, C...
Complete tuna club. Figure 1 l-'-1 Figure 2 ↓ Figure 3 Figure 6 = 1

Claims (1)

[Claims] The rotor, the idle plate F1 which is formed in the rotor and which holds the vanes, liners, and retainers that are slidable in the large slit to form an operating gap, and the housing which forms the suction royal family and the discharge royal family with the side plate. In Go/Pretuna, there are two pipame boats installed in the admirable inlet that leads to the suction palace, which communicates the nine inlet pressure chambers with the inlet pressure chamber, the spool pulp that opens and closes the inlet bypass port, and the sgur barfka. Open the bypass port and apply a load to the meat. Two types of strong and weak IIO springs, KW between the routes to connect the body discharge royal family and the end of the cough spool pulp! A control circuit for supplying control signals to the nine lunoid valves and the solenoid pulp.
I would like to make sure that I am prepared.