Rotary two-stage compressor and air conditioner using the compressor
A rotary compressor technology, applied in the field of air conditioners and rotary 2-stage compressors, can solve the problems of low efficiency coefficient COP, increased leakage of cold medium, and increased swing of rollers, so as to reduce the leakage loss of cold medium , The effect of reducing leakage and reducing leakage loss
Inactive Publication Date: 2006-06-28
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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Problems solved by technology
Therefore, there is a problem that the roller of the high-pressure compression element swings greatly, resulting in an increase in the amount of leakage of the refrigerant here.
[0011] In addition, since the air pressure load in the high-pressure compression element and the low-pressure compression element is different, the intermediate shaft between the two eccentric parts on the rotating shaft is easily deformed, resulting in increased vibration of the roller and increased refrigerant leakage. big problem
[0012] In addition, in an air conditioner to which a compressor having such a problem is applied, the desired performance may not be exhibited in response to an input, and the coefficient of efficiency COP (Conference of Parties) may be lowered.
Method used
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Embodiment Construction
[0029] Embodiments of the present invention will be described below with reference to the accompanying drawings. figure 1 It is a longitudinal sectional view of a rotary two-stage compressor showing an embodiment of the present invention, figure 2 is a diagram showing its structure. The compressor 1 has an airtight container 13 composed of a bottom 21 , a cover 12 , and a body 22 . A motor 14 having a stator 7 and a rotor 8 is provided above the inside of the airtight container 13 . The rotary shaft 2 connected to the motor 14 has two eccentric parts 5 and is pivotally supported by the main bearing 9 and the sub bearing 19a. The two eccentric parts 5 are connected by an intermediate shaft 44 having a step in the axial direction. With respect to the rotary shaft 2, the main bearing 9 having the end plate portion 9a, the high pressure compression element 20b, the intermediate partition plate 15, the low pressure compression element 20a, and the end plate portion 19b and sub ...
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A rotary two-stage compressor and an air conditioner using the same. It suppresses the swing of the roller in the compression element for high pressure and reduces the leakage loss of the cold medium. The rotary two-stage compressor of the present invention has, in an airtight container, a rotary shaft including two eccentric parts; a rotary compression element including a low-pressure compression element and a high-pressure compression element arranged through an intermediate partition, and each The compression chamber of the compression element has a roller orbiting by the eccentric rotation of the eccentric part; The internal space of the airtight container is isolated, and the heights of the eccentric portion and the rollers in the low pressure compression element are set as h1 and H1 respectively, and the heights of the eccentric portion and the rollers in the high pressure compression element are respectively set as h2 , H2, H1>H2, and (h1 / H1)≤(h2 / H2).
Description
technical field [0001] The present invention relates to a rotary two-stage compressor used in an air conditioner having a refrigerating cycle, and an air conditioner using the compressor. Background technique [0002] Conventionally, a structure disclosed in JP-A-60-128990 (hereinafter referred to as Patent Document 1) is known as a rotary-type two-stage compressor used in an air conditioner having a refrigeration cycle. This prior art compressor has an electric motor including a stator and a rotor in the upper portion inside the airtight container. There are two eccentric parts on the rotating shaft connected to the motor. As a compression mechanism corresponding to these eccentric portions, a high-pressure compression element and a low-pressure compression element are provided in order from the motor side inside the airtight container. [0003] The eccentric rotation of each compression element by the eccentric portion of the rotary shaft causes the rollers to perform or...
Claims
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IPC IPC(8): F04C29/00F04C23/00
Inventor 久保田淳渡部一孝金子正人大沼敦井崎宏田所哲也
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC