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Control valve for variable-capacity compressor

A technology for compressors and control valves, which is applied to liquid variable-capacity machinery, variable-capacity pump components, multi-way valves, etc. Reduce the attractiveness and other problems, and achieve the effect of improving the startability and realizing the miniaturization.

Inactive Publication Date: 2019-03-01
FUJIKOKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in the variable displacement compressor control valve 2' described in the above-mentioned Patent Document 2, when the passage diameter (orifice) of the release passage in the valve is increased to ensure the flow rate in order to improve the startability, the valve internal The outer diameter of the sub-spool that opens and closes the release passage increases, the inner diameter of the cylindrical plunger inserted outside the sub-spool increases, and the area of ​​the upper end (surface) of the plunger facing the attraction element (magnetic Road area) will inevitably decrease, resulting in a decrease in the attractive force of the electromagnetic actuator, so there is a problem that it is difficult to miniaturize (especially, the miniaturization of the coil part of the electromagnetic actuator)
In particular, in the prior art described in the aforementioned Patent Document 2, the sub-spool is locked to the plunger by the large-diameter locking portion provided on the sub-spool. The outer diameter of the sub-spool portion of the sub-spool that opens and closes the relief passage in the valve

Method used

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  • Control valve for variable-capacity compressor
  • Control valve for variable-capacity compressor
  • Control valve for variable-capacity compressor

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no. 1 approach

[0049] Figure 1 ~ Figure 3 It is a vertical cross-sectional view showing the first embodiment of the control valve for a variable displacement compressor according to the present invention, figure 1 Indicates that the main valve is open and the auxiliary valve is closed (during normal control), figure 2 Indicates that the main valve is closed and the auxiliary valve is closed (when the compressor starts transition), image 3 Indicates that the main valve is closed and the auxiliary valve is open (when the compressor is started).

[0050] In addition, in this specification, descriptions of positions and directions such as up and down, left and right, front and rear, etc. are indicated in accordance with the drawings for convenience in order to avoid complicating the description, and are not limited to the positions in the state where the compressor is actually assembled. ,direction.

[0051] Also, in each figure, gaps formed between components, spacing distances between c...

no. 2 approach

[0086] Figure 6 ~ Figure 8 It is a vertical cross-sectional view respectively showing the second embodiment of the control valve for a variable displacement compressor according to the present invention, Image 6 Indicates that the main valve is open and the auxiliary valve is closed (during normal control), Figure 7 Indicates that the main valve is closed and the auxiliary valve is closed (when the compressor starts transition), Figure 8 Indicates that the main valve is closed and the auxiliary valve is open (when the compressor is started).

[0087] The control valve 2 of the second embodiment is basically different from the control valve 1 of the above-mentioned first embodiment only in the structure of the plunger 37 and the sub-spool 17 . Therefore, components having the same functions as those in the first embodiment are given the same reference numerals and their detailed descriptions are omitted, and only the above-mentioned differences will be described in detail...

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Abstract

The present invention provides a control valve for variable-capacity compressor having a simple structure, and with which it is possible to ensure the size of the auxiliary valve element part of the auxiliary valve element that opens and closes the internal relief passage, and with which it is possible to improve start-up characteristics and reduce size. The auxiliary valve element (17) is integrated to the plunger (37) for moving the main valve element (15) in the valve opening and closing direction, in such a manner that the auxiliary valve element (17) and the plunger (37) always move together. The auxiliary valve element (17) is inserted into and fixed to the plunger (37).

Description

technical field [0001] The present invention relates to a control valve for variable displacement compressors used in automobile air conditioners and the like. Background technique [0002] In the past, use such as Figure 10 The inclined plate type variable capacity compressor shown in the simple diagram is used as a compressor for automobile air conditioners. This swash plate type variable displacement compressor 100 has: a rotary shaft 101 driven to rotate by an on-vehicle engine, a swash plate 102 mounted on the rotary shaft 101, a crank chamber 104 provided with the swash plate 102, a 102 to reciprocate a piston 105, a discharge chamber 106 for discharging refrigerant compressed by the piston 105, a suction chamber 107 for sucking refrigerant, and a suction chamber 107 for releasing the pressure Pc of the crank chamber 104. The internal release passage (fixed orifice) 108 and so on. [0003] On the other hand, the discharge pressure Pd is introduced from the discharge...

Claims

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Application Information

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IPC IPC(8): F04B27/18
CPCF04B27/1804F04B39/14F04B2027/1827F04B2027/1831F04B2027/1854F04B2027/1859F04B2027/1877F04B2027/1881F04B27/18F16K11/044F16K11/048F16K31/0644
Inventor 久米义之浅野恒坂本骏伊东雅晴
Owner FUJIKOKI MFG CO LTD
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