Rotary compressor, refrigerating circulation and ice house using same

Abstract

A rotary compressor having a piston provided integrally with a blade is contained in a hermetic vessel which is operated at a suction pressure of the rotary compressor and not to discharge pressure. The rotary compressor includes a compression mechanism portion having a cylinder which includes a suction port formed in a cylinder chamber, a piston which eccentrically revolves in the cylinder, a blade which is integrally formed with the piston and partitions the cylinder chamber into a high pressure chamber and a low pressure chamber, and a driving shaft for revolving the piston. The rotary compressor also includes an electric motor portion for rotating the driving shaft, a hermetic vessel which houses the compression mechanism portion and the electric motor portion and is in communication with the suction port thereby to maintain an interior of the hermetic vessel at a suction pressure atmosphere, and a discharge port formed in the cylinder chamber and in direct communication with an exterior of the hermetic vessel, whereby starting is smoothly performed, a motor having a large starting torque is not required, components such check valves can be avoided, and lubricating oils with stable viscosity can be used such that the compressor operates with environmentally-friendly refrigerants.

Description

technical field [0001] The present invention relates to a rotary compressor having a piston integrally designed with vanes, a refrigerating cycle performed in a refrigeration device, an air conditioner, etc. using the compressor, and a refrigerator using the compressor. Background technique [0002] Figure 5 , 6 A rolling piston type rotary compressor (in this example, a 2-cylinder rotary compressor) in the prior art is shown, such as the one disclosed in Japanese Patent Publication No. 2502756. Figure 5 is the longitudinal section view of the compressor and the refrigeration cycle diagram, Figure 6 It is a cross-sectional view of the compression mechanism part of this compressor. Refer to the following Figure 5 , Figure 6 Be explained. A conventional rotary compressor includes a motor unit 50 and a compression mechanism unit 60 composed of a stator 1 and a rotor 2 . This compression mechanism part 60 is driven by this motor part 50, comprises: frame 19; Cylinder 5,...

AI Technical Summary

Problems solved by technology

Since the fulcrum is not in one place as mentioned above, the fulcrum is at Figure 10A status and Figure 10B Problems such as instability, sliding of the guide groove 17, and reduced reliability occur at the moment of movement between states

[0021] If the motion space 5a of the blade is opened in the airtight container 13, due to the increase or decrease of the volume of the motion space of the blade, problems such as loss and unstable fulcrum of the guide groove can be avoided. When the airtight container 13 is the discharge pressure, as Figure 11 As shown, the pressure in the moving space 5a of the vane is the discharge pressure Pd, the fulcrums S and S' of the guide groove 17 are close to the inner circumference of the cylinder, and the loads F3 and F3' between the plane part of the guide groove and the side of the vane are concentrated on the On the narrow part of the inner circumference of the cylinder, not only the sliding loss is increased, but also the reliability is reduced

[0022] In addition, when a discharge pressure atmosphere is formed in the airtight container 13, if a flammable refrigerant such as a hydrocarbon-based refrigerant (HC refrigerant) is used, the space in the airtight container becomes a high-pressure part, and the discharge of the circuit volume in motion If the pressure part increases, the oil accumulated in the airtight container will be exposed to the discharge pressure, and the amount of refrigerant dissolved in the oil will increase compared with the suction pressure atmosphere, thereby increasing the amount of refrigerant sealed in the circuit. These phenomena Considering the relationship with ignition and explosion and safety considerations, it is undesirable to appear

In addition, from the viewpoint of reducing the amount of sealed refrigerant, it is desirable that the space volume in the airtight container be as small as possible, but in the reciprocating compressor that sucks the atmosphere of pressure mist in the airtight container, if Figure 12 As shown, since it is an asymmetrical structure with piston 15a and cylinder 5 arranged only in one direction relative to the center of the motors 1, 2 and drive shaft 6, resulting in a part of the internal space volume of the non-compression mechanism part increase

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