KR-20260062281-A - Discharge valve of scroll type electric compressor

Abstract

The present invention relates to a discharge valve of a scroll-type electric compressor, and more specifically, to a discharge valve of a scroll-type electric compressor capable of reducing noise and vibration when opening and closing the discharge port and reducing the volume of the discharge port. The discharge valve of a scroll-type electric compressor according to the present invention opens and closes the discharge port of a scroll-type electric compressor having a fixed scroll that engages with the rotating scroll to form a compression chamber and has a discharge port formed therein for discharging high-pressure refrigerant pressurized in the compression chamber. At this time, the discharge valve is characterized by having an elastic plug means and a sound-absorbing pad. The elastic plug means is mounted on the fixed scroll so as to block the discharge port so that the discharge port is opened by the pressure of the refrigerant when the pressure of the refrigerant in the compression chamber exceeds a certain pressure. The sound-absorbing pad is coupled to one surface of the elastic plug means that blocks the discharge port so as to contact the discharge port in order to reduce noise and vibration when the elastic plug means closes the discharge port.

Inventors

• 장수경
• 한상욱
• 임종학

Assignees

• 지엠비코리아 주식회사

Dates

Publication Date

20260507

Application Date

20241029

Claims (3)

1. A discharge valve for opening and closing the discharge port of a scroll-type electric compressor having a rotating scroll and a fixed scroll that engages with the rotating scroll to form a compression chamber and has a discharge port formed therein for discharging high-pressure refrigerant pressurized in the compression chamber, wherein An elastic plug means mounted on the fixed scroll to block the discharge port so that the discharge port is opened by the pressure of the refrigerant when the pressure of the refrigerant in the compression chamber is above a certain pressure, and A discharge valve of a scroll-type electric compressor characterized by having a sound-absorbing pad coupled to one surface of the elastic plug means that blocks the discharge port to contact the discharge port in order to reduce noise and vibration when the elastic plug means closes the discharge port.
2. In claim 1, the sound-absorbing pad is A discharge valve of a scroll-type electric compressor characterized by having a filling projection formed to be inserted into the discharge port in order to reduce the refrigerant contained in the discharge port while the discharge port is closed by the elastic plug means.
3. In paragraph 2, the elastic plug means is A discharge valve of a scroll-type electric compressor, characterized in that one end is fixedly coupled to the fixed scroll, the other end is formed to be coupled to the sound-absorbing pad to block the discharge port, and the other end is formed as a thin film so that the discharge port can be opened by bending relative to the one end due to the pressure of the refrigerant.

Description

Discharge valve of scroll type electric compressor The present invention relates to a discharge valve of a scroll-type electric compressor, and more specifically, to a discharge valve of a scroll-type electric compressor capable of reducing noise and vibration when opening and closing the discharge port and reducing the volume of the discharge port. FIGS. 4 and 5 are conventional scroll-type electric compressors. The conventional scroll-type electric compressor includes a shaft (11), a fixed scroll (13), a rotating scroll (15), a main housing (17), a ring (19), and a pin (21). The fixed scroll (13) is fixed inside the case (10), and an outlet (14) is formed in the fixed scroll (13). The rotating scroll (15) engages with the fixed scroll (13) to form a compression chamber (33) and is eccentrically fixed to the shaft (11), and rotates when the shaft (11) rotates. When the rotating scroll (15) rotates, the refrigerant inside the compression chamber (33) is compressed. At this time, when the shaft (11) rotates, the swivel scroll (15) must perform a swivel motion instead of a rotational motion. To prevent the swivel scroll (15) from performing a rotational motion, a groove is formed on the back of the swivel scroll (15) and a plurality of rings (19) are inserted therein. Then, a pin (21) is press-fitted into the main housing (17) so that one end is inserted into the ring (19) and fixed therein. When the shaft (11) rotates, the swivel scroll (15) cannot rotate due to interference with the pin (21) and can only perform a swivel motion. Here, the ring (19) is inserted into the groove with a certain tolerance so that it can rotate inside the groove. This is because if the ring (19) cannot rotate, the frictional force with the pin (21) increases, or noise or wear occurs. The main housing (17) surrounds the rotating scroll (15) and supports the rotating scroll (15). At this time, a back pressure chamber (31) and a low pressure chamber (35) are formed inside the main housing (17). The back pressure chamber (31) is on the inner side of the rotating scroll (15), and the low pressure chamber (35) is on the outer side of the rotating scroll (15). Refrigerant is introduced from the outside into the low-pressure chamber (35), and the refrigerant is supplied from the low-pressure chamber (35) to the compression chamber (33). In the compression chamber (33), the rotating scroll (15) rotates to compress the refrigerant introduced from the low-pressure chamber (35). The compressed refrigerant is discharged to the outside through the discharge port (14). At this time, because the pressure in the compression chamber (33) is high, the rotating scroll (15) attempts to detach from the fixed scroll (13). To prevent this, a portion of the compressed refrigerant discharged from the compression chamber (33) is supplied to the back pressure chamber (31). The back pressure chamber (31) serves to press the rotating scroll (15) in the direction of the fixed scroll (13) using the back pressure of the contained compressed refrigerant. FIG. 1 is a cross-sectional view of an embodiment of a discharge valve according to the present invention installed on a fixed scroll of a scroll-type electric compressor. FIG. 2 is a conceptual diagram of a cross-section of the discharge valve of FIG. 1. FIG. 3 is a plan view of FIG. 1, FIG. 4 is a cross-sectional view of a conventional scroll-type electric compressor, Figure 5 is a cross-sectional view taken from BB of Figure 4. An embodiment of a discharge valve according to the present invention is described using FIGS. 1 to 3 with reference to the scroll-type electric compressor shown in FIGS. 4 and 5. In the present invention, the discharge valve (80) is equipped with an elastic plug means (81) and a sound-absorbing pad (85). The elastic plug means (80) opens and closes the discharge port (14) of the fixed scroll (13). At this time, the elastic plug means (80) opens the discharge port (14) by the pressure of the refrigerant so that the refrigerant can be discharged from the compression chamber (33) when the pressure of the refrigerant in the compression chamber (33) is above a certain pressure, and closes the discharge port (14) when it is not pressurized to a certain pressure. Thus, in this embodiment, the elastic plug means (80) is formed as a thin film, with one end (81a) fixed to the fixed scroll (13) and the other end (81b) blocking the discharge port (14). Therefore, when the pressure of the refrigerant discharged from the discharge port (14) is above a certain pressure, the elastic plug means (80) elastically deforms so that the other end (81b) opens the discharge port (14), and when the pressure of the refrigerant is lower than the certain pressure, the elastic plug means (80) restores to its original state so that the other end (81b) closes the discharge port (14). At this time, when the elastic plug means (81) closes the discharge port (14), it applies impact to the fixed scroll (13). In this case