Compressor

A technology for compressors and compression mechanisms, applied in the field of compressors, can solve the problems of poor responsiveness, large discharge resistance, and overcompression loss, and achieves the reduction of responsiveness, the increase of flow velocity, and the suppression of overcompression loss. Effect

Inactive Publication Date: 2005-11-16
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the case of using a poppet valve, the speed of the motor is adjusted by inverter control and the displacement is adjusted, and the overcompression loss becomes a problem due to the increase and decrease of the flow rate of the gas refrigerant at the discharge port.
[0010] Specifically, the valve plate suitable for small flow generally has a small lifting amount and a small opening area. If the valve plate is used under a large flow rate, due to insufficient lifting amount or insufficient opening area, the flow rate will increase and the discharge resistance will become larger, resulting in overcompression loss
Also, if a valve suitable for large flow is used at a small flow rate, the valve plate will become larger despite the small flow rate, and the flow rate will become slower, and the pressure acting on the valve plate will become lower, so the responsiveness when opening will deteriorate, and it will still overcompression loss

Method used

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Experimental program
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Effect test

no. 1 approach

[0052] Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

[0053] This embodiment relates to a rotary piston type compressor (1). like figure 1 As shown, the compressor (1) accommodates a compression mechanism (20) and a motor (drive mechanism) (30) that drives the compression mechanism (20) in the casing (10), and is a fully enclosed structure. The compressor (1) drives a compression mechanism (20) by an electric motor (30), sucks in refrigerant, compresses it, and then discharges it so that it circulates in a refrigerant circuit.

[0054] The casing (10) is composed of a cylindrical casing body (11) constituting the peripheral wall of the casing (10) and cover plates (12, 13) fixed on the upper and lower ends of the casing body (11). Moreover, both the compression mechanism (20) and the motor (30) are fixed on the casing body (11) of the casing (10), and the compression mechanism (20) is located below the m...

no. 2 approach

[0083] The second embodiment of the present invention is an example in which the structure of the discharge valve mechanism (40) of the first embodiment is modified.

[0084] The discharge valve mechanism (40) is controlled by figure 1 Shown by phantom lines in , the first valve mechanism (40A) disposed on the rear end cap (23) side and the second valve mechanism (40B) disposed on the front end cap (22) side constitute.

[0085] In this second embodiment, if Image 6 As shown, the first discharge port (29a) is formed on the rear end cover (23), and the first valve mechanism (40A) is configured to open and close the first discharge port (29a) by using the first valve plate (41A) as a reed valve . and, if Figure 5 As shown, the second discharge port (29b) is formed in the front end cover (22), and the second valve mechanism (40B) is configured to open and close the second discharge port (29b) by the second valve plate (41B) as a poppet valve. The poppet valve (41B) is forme...

no. 3 approach

[0091] The third embodiment of the present invention is an example in which one valve plate has the functions of a reed valve and a poppet valve.

[0092] The discharge valve mechanism (40) is provided on the front end cover (22) side as in the first embodiment. In this discharge valve mechanism (40), the first discharge port (29a) is a circular hole with a constant inner diameter, and the second discharge port (29b) is formed as a cone whose inner diameter gradually increases from the inside to the outside of the compression chamber (25). hole. The first discharge port (29a) is formed at the front end side of the valve plate (43), and the second discharge port (29b) is formed at the base end side thereof.

[0093] The part of the valve plate (43) corresponding to the first discharge port (29a) is formed in a flat plate shape, and the part corresponding to the second discharge port (29b) is formed in a frustoconical shape to fit the second discharge port (29b). That is, the ...

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PUM

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Abstract

A discharge valve mechanism (40) has discharge openings (29a, 29b). The number of discharge openings (29a, 29b) to be placed in the open state is varied depending on the pressure and the flow rate of gas refrigerant discharged from a compression chamber (25). Accordingly, the occurrence of overcompression losses at the time of controlling of the variable displacement of a compressor is inhibited during the operation from small to large displacement. This achieves improvements in compressor operating efficiency.

Description

technical field [0001] The present invention relates to a compressor, in particular to the structure of the discharge valve mechanism arranged at the discharge port of the compression mechanism. Background technique [0002] Conventionally, for example, in a refrigeration apparatus having a refrigerant circuit of a vapor compression refrigeration cycle, a compressor is used to compress refrigerant. As such a compressor, for example, a rotary compressor is known in which a compression mechanism and a motor for driving the compression mechanism are accommodated in a hermetic casing. [0003] The above-mentioned compression mechanism has: a cylinder; and a piston that actually contacts the inner peripheral surface of the cylinder and performs eccentric rotation. A compression chamber is formed between the cylinder and the piston. A vane is attached to the compression chamber to divide the compression chamber into a low-pressure side (suction side) and a high-pressure side (co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B39/10F04C29/12
CPCF04C29/128Y10T137/7891F04B39/1066Y10T137/7893Y10T137/784Y10T137/7892F04B39/1073Y10T137/7839F16K15/162F04C29/00F04B39/10F16K15/161
Inventor 芝本祥孝东洋文浅野能成清水孝志堀和贵
Owner DAIKIN IND LTD
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