JPS59173588A - Eccentric rotary compressor of variable displacement type - Google Patents

Abstract

PURPOSE:To change the delivery amount of a refrigerant in accordance with the amount of super heat, by controlling an expansion member to be expanded and contracted in accordance with a change of temperature of the refrigerant, introduced into a low pressure chamber, so as to move a cam ring and changing the compression ratio. CONSTITUTION:Sucked refrigerating gas 12 is allowed to flow into a low pressure chamber 9 in the front side, and a part of the gas is allowed to flow into a low pressure chamber 9 in the rear side from a bypass passage 16. The gas 12, being allowed to flow in the periphery of an expansion member 11, warms working fluid 13 sealed in the expansion member 11. Consequently, if the recirculative amount of refrigeration tends to be excessive with an over amount of super heat, the expansion member 11 expands to move a housing 1 of a cam ring against an adjusting spring 10 in the direction of eccentrically placing a rotor 3, and a compression rate is increased.

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to an improvement in an eccentric rotary impresor. J Hanoru (F, hi) (rotor IJ) compressor 1 for automobile cooling cycle, small number of parts and small?\:'
It is good to have one tree effect on ←jl′, but if
7) 111-choki father] 1 required cooling function (J
Depends on the engine rotation speed (y L, 'U is /, :me, ll: (3 stop line 11
To r+, the cooling IJf=force is set to 1. The expansion valve is adjusted to 1. This happens when the L adjustment is not completed, and super-peet illumination occurs.
It can be understood by the increase or decrease in

[(ru.
-In: /J<Person" and 〈\" is supplied with compression ヰi. If the amount of refrigerant is decreased (,1' good (1a, that is, a3 is in relation to the superheat flat), if the amount of refrigerant discharged is controlled 1,
With the automatic width, it is possible to obtain the optimum cooling power in the entire Iff driving range, and it is possible to suppress power loss to a small extent. However, in conventional eccentric rotary compressors, the working chamber (in other words, the compression ratio) is fixed and the rotational speed depends on the engine rotational speed. You cannot change the ljl appearance of . Therefore, depending on the amount of superheat, the refrigerant discharge 1
iF 11! It is not possible to leave. The present invention was made in order to solve this problem, and is a variable that can change the volume of compressor υ by sensing superheat by itself, and change the discharge amount of refrigerant according to superheat 1. Our purpose is to provide the 6th model eccentric rotary compressor. The structure of the present invention that achieves such an object is such that a side housing and a ring housing on the right side of the suction boat and the discharge boat form a working chamber in which the rotor is housed, while the housing is surrounded by a case to form a low pressure chamber. The constituting eccentric rotary compressor is provided with a ring housing movable in the radial direction of the ring housing and a refrigerant used in the cooling cycle between the ring housing and the case. -b A telescoping member filled with a working fluid with high evaporation pressure is installed ('J, the cam ring is moved by the movement of the telescoping member in accordance with changes in the humidity of the refrigerant introduced into the low pressure chamber in the case. The structure of the present invention will be explained below based on an embodiment shown in the drawings. Fig. 1 shows the variable sound ff' type I-core type of the present invention. 1. An embodiment of a cot retard compressor is shown in a central cross-sectional view. This compressor has a perfect circular rotor 3 eccentrically installed in a circular ring housing 1, and is operated by several vanes 4. It is an eccentric vane type that defines a chamber 5.The working chamber 5 includes a ring housing 1, a night housing 2 that closes both sides of the ring housing 1, a circular rotor 3, and a rotor 3 that protrudes from the ring housing 1. It is composed of several vanes 4 that are in sliding contact with the inner circumferential surface.The working chamber 5 is connected to the low pressure inside the case 8 through the 1'f1 person port 6 and the discharge boat 7, which are bored in the rigid housing 2. Jf, ¥9 and ml pressure chamber 15
are communicated with each other. The rotor 3 is rotatably supported by the nide housing 2, and is configured to rotate when driven from the outside.
The housing constituted by the side housing 2 and the side housing 2 is housed in a case 8, and a low pressure chamber 9 and a high pressure chamber 15 are formed between the case 8 and the side housing 2. The low pressure chamber 9 includes a front low pressure chamber and a rear low pressure chamber that communicate with each other through a bypass path 1q. Furthermore, although the side housing 2 is fixed to the case 8, the ring housing 1 is simply a double plate that is housed in the groove 17 of the case 8 in order to be able to move in the radial direction of the coater 3. be. A telescopic member 11 that supports the ring housing 1 is installed in the low pressure chamber 9 of the case E3. This telescopic member 1
1 is a member that expands and contracts according to changes in the pressure of the sealed fluid, such as a bellows. A high-temperature working fluid 13 is enclosed. This working fluid 13 is the refrigerant used (generally on R1)
The evaporation pressure is higher than that of J°, and the characteristics related to temperature and pressure show the same tendency as shown in Figure 3. l- is preferred. Therefore, for example, a refrigerant prepared by adding nitrogen (N) to the working fluid can be used. In addition, on the opposite side of the ring housing 1, corresponding to the telescopic portion @11, there is provided an adjustment line link 10 for biasing the ring housing 1 toward the telescopic member 11 in the direction C. The adjustment ring 10 is for easily moving the ring housing 1 to the right side, and moves the spring seat 19 by operating the adjustment screw 18 to adjust the spring force. With the structure as described above, the rIJ transformation of the present invention operates as follows. The low-pressure refrigerant gas 12 sucked through the gas suction port 13 of the case 8 first enters the front-side low-pressure chamber 9, and part of it passes through the bypass path 16 and enters the rear-side low-pressure chamber 9. At this time, since the low-temperature refrigerant gas 12 passes through the circumference of the expandable member 11, it warms the working fluid 13 sealed in the expandable member 11. Therefore, when the superheat of the refrigerant is low, that is, when the amount of circulating refrigerant is slightly excessive, the temperature of the sealed fluid 13 also decreases and the pressure is lowered, so that the expandable member 11 contracts. That is, as shown in FIG. 1(a), the ring housing 1 receives the elastic force of the adjustment spring 10 and moves to be positioned concentrically with the rotor 3. Then, the coater 3 just rotates and does not compress and discharge the low-settlement refrigerant gas. On the other hand, if there is too much superheat, that is, if the circulating refrigerant IT+ is in excess, the temperature of the sealed fluid 13 will rise to the limit and the pressure will increase, causing the expandable member 11 to expand. That is, as shown in FIG. 1(b),
The ring housing 1 moves against the elastic force of the adjustment spring 10 in a direction to relatively eccentrically move the ring housing 1 to a direction in which the compression ratio increases. As a result, the rotor 3 compresses and discharges the refrigerant gas. Then, when the suction boat 6 to the working chamber 5 opens due to the rotation of the rotor 3, the low pressure refrigerant gas 12 in the front and rear low pressure chambers 9 passes through the suction boat 6 and flows into the working chamber 5. Inhaled. Furthermore, when the first coater 3 rotates and the vane 4 closes the suction bow 1-6, the suction process ends and the process moves to the compression process. As the rotation of the rotor 3 progresses and the compression process is completed, the valve (not shown) of the discharge boat 7 is opened and the high pressure gas L;
(The gas discharge port of the knock is red and the gas is discharged from the 21st position to the 1st position.) As is clear from the above explanation, it is clear that The compressor IJ, the refrigerant used, is filled with a working fluid with high evaporation power, and is heated internally according to the super same TV1) [)
By changing J, the ring housing is supported and made movable by a telescoping member, so that it can sense the amount of super heat during cooling recycle by itself.1. , ] - By changing the temperature f and d, it is possible to adjust the flow rate of the refrigerant without changing the compression ratio. Therefore, the combbrella of the present invention changes its capacity depending on what it does.
In addition to improving the cooling capacity of the air conditioner, it also suppresses the cooling capacity from exceeding the necessary level at medium speeds and above. In addition, since this combination sensor senses Nuvahi 1 to Sadaguchi, it is possible to prevent the vane from seizing.

[Brief explanation of drawings]

The drawings are diagrams related to the variable Furukawa type eccentric type [1-cricompletion] of the present invention, and Fig. 1 (a') is a central cross-sectional view of the J hub when the amount of superheat is small;
Figure 1 (1)) is a central cross-sectional view of the same compressor when subheating is used in a small space, Figure 2 is a 11-■ cross-sectional view of the open-1 combustion tree, and Figure 3 is the temperature and evaporation of the sealed fluid. FIG. 3 is a characteristic diagram showing the nearness of the pressure. DESCRIPTION OF SYMBOLS 1... Ring housing, 2... Side housing, 3... Rotor, 4... Vane, 5... Working chamber, 8... Coos, 9... Low pressure chamber, 11...
- Expandable member, 12... Refrigerant, 13... Enclosed working fluid.

Claims (1)

[Claims] Enjoy the suction boat and discharge boat! In an eccentric rotary compressor in which a noid housing and a ring housing constitute a working chamber that accommodates the rotor, and the housing is surrounded by a coos to constitute a low pressure chamber, the ring housing is connected to the rotor. A retractable member is installed in the radial direction of the ring housing and a working fluid with a high pressure is installed between the ring housing and the coos. The cam ring is moved by the movement of the telescopic member that expands and contracts as the refrigerant introduced into the low pressure chamber in the case changes in temperature to change the compression ratio.