KR20230066966A - Scroll compressor - Google Patents

Abstract

The present invention relates to a scroll compressor including: a casing including a discharge chamber that sucks refrigerant inside and discharges the compressed refrigerant through a compression mechanism; a fixed scroll that engages with a rotating scroll to form a compression chamber; a discharge port that is formed on the fixed scroll and through which the compressed refrigerant in the compression chamber is discharged; an opening and closing part that is disposed on the fixed scroll and opens and closes the discharge port; and a buffer means that is disposed at least partially along the circumference of the discharge port and buffers an impact between the opening and closing part and the discharge port. According to the present invention, the impact between the discharge port and a discharge lead can be alleviated when opening and closing the discharge port, thereby reducing an impact sound and extending the life of a component.

Description

Scroll Compressor {SCROLL COMPRESSOR}

The present invention relates to a scroll compressor, and more particularly, to a scroll compressor capable of reducing impact noise and prolonging the life of components by mitigating blows between a discharge port and a discharge lead when opening and closing the discharge port.

In general, an air conditioning unit (A/C) for cooling and heating the interior of a vehicle is installed. As a component of a cooling system, such an air conditioner includes a compressor that compresses a low-temperature, low-pressure gaseous refrigerant introduced from an evaporator into a high-temperature, high-pressure gaseous refrigerant and sends it to a condenser.

Compressors include a reciprocating type that compresses refrigerant according to the reciprocating motion of a piston and a rotary type that compresses refrigerant while rotating. In the reciprocating type, there is a crank type that uses a crank to transmit to a plurality of pistons according to the transmission method of the drive source, a swash plate type that transmits to a rotating shaft with a swash plate installed, and the like. There are scrolling types that use orbiting scrolls and fixed scrolls.

Scroll compressors are widely used for refrigerant compression in air conditioners, etc., because of the advantages of obtaining a relatively high compression ratio compared to other types of compressors and obtaining stable torque by smooth refrigerant suction, compression, and discharge strokes.

The scroll compressor may be electrically implemented, and in this case may belong to the category of scroll compressors.

In the case of a scroll compressor, the refrigerant is compressed through the interaction between the orbiting scroll and the fixed scroll. At this time, the orbiting scroll is connected to the eccentric bush disposed at the end of the driving shaft connected to the motor, and forms a compression region with the fixed scroll by the rotational force transmitted by the eccentric bush according to the rotation of the driving shaft. And the compressed refrigerant is discharged through the discharge port formed in the fixed scroll.

1b shows a discharge port 3 of a conventional scroll compressor. The discharge port (3) may be formed in the fixed scroll (2), and the refrigerant compressed in the compression chamber (4) formed by the orbiting scroll and the fixed scroll (2) is discharged through the discharge port (3) to the discharge chamber (5). discharge with At this time, the discharge lead 1 contacts/non-contacts the discharge port 3 and opens and closes.

However, as shown in FIG. 1C, in the conventional scroll compressor, when the discharge pressure of the refrigerant is lowered, the discharge lead 1 contacts the discharge port 3 for the next compression and the discharge port 3 is closed. , At this time, the discharge lead 1 hits the discharge port 3 strongly (A). Accordingly, a hitting sound is frequently generated, which reduces customer satisfaction by generating noise while the vehicle is driving. In addition, continuous blows may adversely affect the lifespan of the parts of the fixed scroll (2) and the discharge lead (1).

KR 10-2021-0074776 A

The present invention has been made to solve the problems in the related art as described above, and an object of the present invention is to mitigate the blow between the discharge port and the discharge lead when opening and closing the discharge port, thereby reducing the hitting sound and extending the life of the part. It is to provide a scroll compressor.

The present invention for achieving the above objects relates to a scroll compressor, comprising: a casing including a discharge chamber for sucking in refrigerant therein and discharging compressed refrigerant through a compression mechanism; A fixed scroll engaged with the orbiting scroll to form a compression chamber; a discharge port formed on the fixed scroll and through which the refrigerant compressed in the compression chamber is discharged; an opening and closing portion disposed on the fixed scroll and opening and closing the discharge port; and a shock absorber disposed at least partially along the circumference of the discharge port and mitigating a blow between the opening and closing portion and the discharge port.

In addition, in the embodiment of the present invention, the opening and closing part, one side of the retainer is fixed to the fixed scroll with a bolt; and a discharge lead formed on the other side of the retainer and contacting a lead contact portion formed around the discharge port.

In addition, in the embodiment of the present invention, the fixed scroll and the rear housing may form a discharge chamber together, and a sealing member disposed between the fixed scroll and the rear housing may be further included to seal the discharge chamber.

In addition, in the embodiment of the present invention, a partition wall formed to surround the discharge chamber is formed in the rear housing, and at least one of the partition wall and the fixed scroll side facing the partition wall has a sealing groove in which a sealing member is seated. can be formed

In addition, in the embodiment of the present invention, the buffer means may include an extension groove connected to the sealing groove and extending to the discharge port; a trepan groove connected to the extension groove and disposed along the circumference of the discharge port; an extension seal connected to the seal member and inserted into the extension groove; and a buffer sealing connected to the extension seal and inserted into the trepan groove, wherein when the discharge lead closes the discharge port, the discharge lead contacts the buffer seal before the lead contact portion and strikes can alleviate

In addition, in the embodiment of the present invention, the diameter (T) of the buffer sealing may be configured to be larger than the depth (D) of the trepan groove.

In addition, in the embodiment of the present invention, based on the width (W) and depth (D) of the trepan groove and the diameter (T) of the buffer seal, the pressure value (S1) of the buffer seal is determined by S1 = T-D can be determined

In addition, in the embodiment of the present invention, based on the width (W) and depth (D) of the trepan groove and the diameter (T) of the buffer seal, the compression ratio (S2) of the buffer seal is S2 = T-D / T can be determined by

In addition, in the embodiment of the present invention, based on the width (W) and depth (D) of the trepan groove and the diameter (T) of the buffer seal, the filling factor (S3) of the buffer seal is S3 = (πT ² / 4) can be determined by /WD.

In addition, in the embodiment of the present invention, the discharge port is formed on the fixed scroll and connected to the compression chamber, the main port through which the refrigerant compressed in the orbiting scroll and the fixed scroll is discharged; and a sub port formed on the fixed scroll and connected to the compression chamber, and configured to additionally discharge the compressed refrigerant when the compression chamber formed by the orbiting scroll and the fixed scroll exceeds a preset pressure. there is.

In addition, in the embodiment of the present invention, the discharge lead is connected to the retainer, the main lead for opening and closing the main port; and a sub-lead connected to the retainer and opening and closing the sub-port.

In addition, in the embodiment of the present invention, the fixed scroll may further include a recessed groove formed at a position corresponding to the retainer and the discharge lead.

According to the present invention, when the discharge port is opened and closed, impact noise between the discharge port and the discharge lead can be alleviated to reduce impact noise, thereby increasing product satisfaction.

In addition, as the blow between the discharge port and the discharge lead is alleviated, the life of the fixed scroll and discharge lead parts can be extended.

1B is a view showing a state in which a discharge port is opened in a conventional scroll compressor;
1C is a view showing a state in which a discharge port is closed in a conventional scroll compressor;
Figure 2 is a side cross-sectional view showing the internal structure of the scroll compressor of the present invention.
3 is a view showing an embodiment in which a buffering means is disposed on a fixed scroll in the present invention.
4 is a view showing another embodiment in which a buffering means is disposed on a fixed scroll in the present invention.
5 is a view showing a buffer sealing disposed along the circumference of a discharge port in the present invention.
6A is a view showing a state in which a discharge port is opened by a discharge lead in the present invention;
6B is a view showing a state in which the discharge lead contacts the buffer sealing and relieves the impact when the discharge port is closed in the present invention.
7 is a view showing the structure of a rear housing in the present invention.

Hereinafter, preferred embodiments of the scroll compressor according to the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIG. 2, the structure of the scroll compressor 100 to which the present invention is applied will be reviewed.

Referring to FIG. 2, the scroll compressor 100 to which the present invention is applied includes a casing 110, a driving unit generating a driving force inside the casing 110, a drive shaft 130 rotated by the driving unit, the It may include a compression mechanism composed of a orbiting scroll 142 and a fixed scroll 141 driven by the driving shaft 130 to compress the refrigerant.

Here, the driving unit may be a motor 120 , and the scroll compressor may include an inverter controlling the motor 120 .

The casing 110 is coupled to a front housing 111 accommodating the motor 120, a center housing 112 accommodating an inverter 150 controlling the motor 120, and the compression mechanism, and includes a discharge unit. It may include a rear housing 113 for accommodating it.

The front housing 111 includes an annular wall 111a, a first partition 111b covering one end of the annular wall 111a, and a second partition 111c covering the other end of the annular wall 111a. Including, the annular wall 111a, the first partition wall 111b and the second partition wall 111c may form a motor accommodation space in which the motor 120 is accommodated.

The center housing 112 may be coupled to the side of the first partition wall 111b to form an inverter accommodating space in which the inverter 150 is accommodated.

The rear housing 113 may be coupled to the fixed scroll 200 coupled to the side of the second partition wall 111c and form a discharge chamber Y.

Here, the second partition wall 111c divides the motor accommodating space and the compression chamber X, serves as a main frame supporting the compression mechanism, and the motor is located at the center of the second partition wall 111c. A bearing hole 114a through which the drive shaft 130 interlocks the compression mechanism with the 120 may be formed.

Meanwhile, the fixed scroll 200 of the compression mechanism may be fastened to the second partition wall 111c, and the rear housing 113 may be fastened to the fixed scroll 200. However, it is not limited thereto, and the rear housing 113 may accommodate the compression mechanism and be fastened to the second partition wall 111c.

The motor 120 may include a stator 121 fixed to the front housing 111 and a rotor 122 rotated by interaction with the stator 121 inside the stator 121.

The drive shaft 130 passes through the center of the rotor 122, and one end of the drive shaft 130 protrudes toward the first partition wall 111b with respect to the rotor 122, and drives the drive shaft 130. The other end of the shaft 130 may protrude toward the second partition wall 111c based on the rotor 122 .

One end 130a of the drive shaft 130 may be rotatably supported by a first bearing 171 provided at a center side of the first partition wall 111b.

Here, a first support groove 111d into which one end of the first bearing 171 and the drive shaft 130 are inserted is formed at the center of the first partition wall 111b, and the first bearing 171 It may be interposed between the first support groove 111d and one end of the drive shaft 130 .

The other end 130b of the driving shaft 130 may be connected to the compression mechanism through the bearing hole 114a of the second partition wall 111c.

In addition, the eccentric bush 160 is connected to the other end 130b of the drive shaft 130 by a connecting pin 190. The eccentric bush 160 may be rotatably supported by a third bearing 173 provided in the compression mechanism. In addition, rotational force is transmitted to the orbiting scroll 142 in association with the third bearing 173 .

Here, a second support groove 114b in which the second bearing 172 is disposed is formed in the bearing hole 114a of the second partition wall 111c, and the second bearing 172 is formed in the second support groove. (114b) and the drive shaft 130 may be interposed.

In addition, a boss portion 142a into which the third bearing 173 and the eccentric bush 160 are inserted is formed in the orbiting scroll 42 of the compression mechanism, and the third bearing 173 is the boss portion ( 142a) and the eccentric bush 160 may be interposed.

The compression mechanism is a fixed scroll 200 fixedly coupled to the second partition wall 111c on the opposite side of the motor 120 based on the second partition wall 111c and the second partition wall 111c and the fixed It may include an orbiting scroll 142 provided between the scrolls 200 and meshed with the fixed scroll 200 to form a compression chamber (X) and orbiting by the driving shaft 130 .

The orbiting scroll 142 may include a disk-shaped orbiting head plate portion 142d and an orbiting wrap 142c protruding from the compression surface 142b of the orbiting head plate portion 142d and engaged with the fixed scroll 200. can

The fixed scroll 200 may include a disk-shaped fixed end plate 241 and a fixed wrap 243 protruding from the compression surface 242 of the fixed end plate 241 and engaged with the orbiting scroll 142. can

A discharge port 210 passing through the fixed end plate part 241 and discharging the refrigerant compressed in the compression chamber X may be formed at a center side of the fixed end plate part 241 . Here, the discharge port 210 may communicate with the discharge chamber Y formed between the fixed scroll 200 and the rear housing 113 .

In the scroll compressor 100 according to this configuration, when power is applied to the motor 120, the drive shaft 130 can transmit rotational force to the orbiting scroll 142 while rotating together with the rotor 122. there is. Then, the orbiting scroll 142 is rotated by the drive shaft 130, so that the compression chamber X can be continuously moved toward the center while reducing its volume. Then, the refrigerant may flow into the motor accommodating space through a refrigerant inlet (not shown) formed in the annular wall 111a of the front housing 111 . Then, the refrigerant in the motor accommodating space may be sucked into the compression chamber X through a refrigerant passage hole (not shown) formed in the second partition wall 111c of the front housing 111 . Then, the refrigerant sucked into the compression chamber (X) may be compressed while moving toward the center along the moving path of the compression chamber (X) and discharged to the discharge chamber (Y) through the discharge port (210). The refrigerant discharged into the discharge chamber Y is discharged to the outside of the scroll compressor through the refrigerant outlet formed in the rear housing 113, and a series of processes are repeated.

In this process, the drive shaft 130 is rotatably supported by the first bearing 171 and the second bearing 172, and the orbiting scroll 142 is supported by the third bearing 173. It is rotatably supported with respect to the drive shaft 130, and the third bearing 173 is used to reduce the weight and size of an assembly (hereinafter referred to as a swing movement body) of the third bearing 173 and the orbiting scroll 142. For this purpose, bearings different from those of the first bearing 171 and the second bearing 172 may be formed.

Specifically, the first bearing 171 and the second bearing 172 fixed to the casing 110 may each be formed as a ball bearing to minimize friction loss.

On the other hand, the third bearing 173, which is in a proportional relationship with the weight and size of the orbiting body as it orbits along with the orbiting scroll 142, is a needle roller bearing that is smaller in weight and size than a ball bearing and has a low cost. roller bearings or slide bush bearings. Also, the third bearing 173 may be press-fitted into the boss portion 142a with a predetermined pressing force.

The basic structure of the scroll compressor of the present invention is as described above, and the structure for achieving the object of the present invention will be described in detail below.

Referring to FIGS. 3 and 4 , the scroll compressor 100 of the present invention may include a fixed scroll 200 , a discharge port 210 , an opening/closing unit 400 and a shock absorber 500 .

The fixed scroll 200 may be engaged with the orbiting scroll 142 to form a compression chamber X for compressing cold waste. As described above, referring to FIG. 2 , when the orbiting scroll 142 rotates, the fixed wrap 243 of the fixed scroll 200 and the orbiting wrap 142c of the orbiting scroll 142 engage with each other and rotate, and the refrigerant will compress

The discharge port 210 may be a hole formed in the fixed scroll 200 and through which the refrigerant compressed in the compression chamber (X) is discharged to the discharge chamber (Y). Referring to FIG. 2 , a discharge port 210 is formed in the fixed scroll 200, and the discharge port 210 may communicate the compression chamber X and the discharge chamber Y.

The opening and closing part 400 is disposed on the fixed scroll 200 and can open and close the discharge port 210 . The opening/closing part 400 may include a bolt 410, a retainer 420, and a discharge lead 430.

One side of the retainer 420 may be fixed by fastening a bolt 410 to the fixed scroll 200 .

The discharge lead 430 may be formed on the other side of the retainer 420 and may have a disk shape having a larger area than the retainer 420 . The discharge lead 430 may contact or not contact the lead contact portion 230 formed around the discharge port 210 to open and close the discharge port 210 .

In an exemplary embodiment of the present invention, a plurality of discharge ports 210 may be formed in the fixed scroll 200 . In this case, it may be composed of a main port 211 and a plurality of sub ports 213 .

The main port 211 is formed in the fixed scroll 200 and is connected to the compression chamber (X), and the refrigerant compressed in the orbiting scroll 142 and the fixed scroll 200 is transferred to the discharge chamber (Y). can eject.

The sub port 213 is formed on the fixed scroll 200 and is connected to the compression chamber X, and the compression chamber X formed by the orbiting scroll 142 and the fixed scroll 200 is preset. It may be a hole through which compressed refrigerant is additionally discharged when a certain pressure is exceeded.

3 and 4, in the embodiment of the present invention, one main port 211 is disposed, and one sub port 213 may be disposed above and below the main port 211, respectively. It is not limited to this.

In this case, the retainer 420 may be divided into a plurality of pieces, and the discharge leads 430 may be composed of a plurality of pieces to open and close the plurality of discharge ports 210 .

The discharge lead 430 may include a main lead 431 and a sub lead 433 . The main lead 431 is connected to the retainer 420 and can open and close the main port 211 . The sub lead 433 is connected to the retainer 420 and can open and close the sub port 213 .

Also, as described above, the discharge chamber Y may be formed by combining the fixed scroll 200 and the rear housing 113 . In this case, in order to seal the discharge chamber (Y), the sealing groove 250 formed on the corresponding surface 200a of the fixed scroll 200 facing the rear housing 113 is made of an elastic material such as rubber or silicon. A sealing member 300 formed may be disposed. Referring to FIGS. 3 and 4 , the sealing member 300 may be disposed along the circumference of the corresponding surface 200a.

Referring to FIG. 7 , one form of the rear housing 113 is disclosed. When the rear housing 113 and the fixed scroll 200 are coupled, the rear housing is formed based on the partition wall 113a of the rear housing. A discharge chamber (Y) and a discharge hole (Y1) may be formed in the central portion of 113, and a suction chamber (P) may be formed in an outer portion of the rear housing 113.

In addition, a second sealing groove 113b in which the sealing member 300 can be disposed may be formed in the partition wall 113a. The sealing member 300 is inserted into the sealing groove 250 of the fixed scroll 200 and the second sealing groove 113b of the rear housing 113, respectively, so that the refrigerant flows between the discharge chamber Y and the suction chamber P. It can be separated to prevent leakage.

Meanwhile, a recessed groove 220 may be formed in the fixed scroll 200 . Referring to FIGS. 3 and 4 , the recessed groove 220 may be formed at a portion corresponding to the retainer 420 on the fixed scroll 200 . If the retainer 420 is divided into a plurality of pieces, the recesses 220 may be formed at corresponding positions.

The recessed groove 220 reduces the contact area between the fixed scroll 200, the discharge lead 430, and the retainer 420 to reduce damage caused by blows or to allow oil to accumulate, thereby reducing the contact area between the fixed scroll 200 and the discharge lead 430 and the retainer 420. A hitting sound between the lid 430 and the retainer 420 can be alleviated.

In addition, if there is foreign matter between the discharge lead and the fixed scroll 200, the recessed groove 220 adversely affects the opening and closing of the lid, and eventually the discharge lead 430 may be damaged. After that, it can be discharged between the discharge lead 430 and the fixed scroll 200.

The buffering means 500 is disposed at least partially along the circumference of the discharge port 210, and can buffer impact between the opening/closing part 400 and the discharge port 210.

The buffering means 500 may include an extension groove 510, a trepan groove 520, an extension seal 540, and a buffer seal 530.

The extension groove 510 may be connected to the sealing groove 250 and may extend to the discharge port 210 . The trepan groove 520 may be connected to the extension groove 510 and disposed along the circumference of the discharge port 210 .

The extension seal 540 may be disposed connected to the sealing member 300 and inserted into the extension groove 510 . In addition, the buffer sealing 530 may be connected to the sealing member 300 and inserted into the extension groove 510 and the trepan groove 520 to be disposed. The extension seal 540 and the buffer seal 530 may also be made of an elastic material like the seal member 300 .

In the embodiment of the present invention, a separate seal is not additionally disposed around the discharge port 210, but the sealing member 300, which was previously disposed on the fixed scroll 200 to seal the discharge chamber Y, is removed. It is applied by extension. Compared to manufacturing a separate seal, the cost of manufacturing the seal can be reduced, and the installation process can be simplified.

FIG. 3 discloses an embodiment of the shock absorber 500, and in the embodiment disclosed in FIG. 3, the extension groove 510 and the trepan groove 520 are formed only at the location of the main port 211. can

Accordingly, the extension seal 540 and the buffer seal 530 may also be arranged only for the main port 211 . This is because the main lead 431 and the lead contact portion 230 are often hit because the main port 211 is mainly discharged with compressed refrigerant, so the shock absorber 500 is placed in the main port 211 to hit noise generation can be suppressed by mitigating the

4 discloses another embodiment of the shock absorber 500, and in the other embodiment disclosed in FIG. 4, the extension groove 510 and the trepan groove 520 are not only the main port 211 but also the sub All may be formed at the location of the port 213.

Accordingly, the extension seal 540 and the buffer seal 530 may also be disposed in both the main port 211 and the sub port 213 . In this case, both the hitting sound generated from the main port 211 through which the compressed refrigerant is mainly discharged and the hitting sound generated from the sub port 213 through which the refrigerant is discharged when the pressure exceeds a predetermined pressure can be alleviated.

When the discharge lead 430 closes the discharge port 210 by the above-described arrangement structure, the discharge lead 430 contacts the buffer sealing 530 before the lead contact portion 230 and strikes. will alleviate

Referring to FIG. 5 , a trepan groove 520 is formed along the circumference of the discharge port 210, and a lead contact portion 230 is formed between the discharge port 210 and the trepan groove 520. . In addition, a buffer sealing 530 is inserted and disposed in the trepan groove 520.

Here, referring to FIGS. 6A and 6B , a specific numerical relationship of the buffer sealing 530 disposed in the trepan groove 520 can be confirmed.

The diameter (T) of the buffer seal 530 may be configured to be greater than the depth (D) of the trepan groove 520. That is, when the buffer sealing 530 is inserted into the trepan groove 520, a portion of the buffer seal 530 may protrude from the inside of the trepan groove 520 toward the discharge lead 430. . Accordingly, when the discharge lead 430 moves toward the discharge port 210, the discharge lead 430 comes into contact with the buffer seal 530 first.

In the embodiment of the present invention, the buffer sealing 530 has been described as being implemented in a circular cross section, but is not limited thereto.

First, based on the width (W) and depth (D) of the trepan groove 520 and the diameter (T) of the buffer seal 530, the pressed value (S1) of the buffer seal 530 is obtained by the following equation can be defined as

S1 = T-D

The pressure value S1 of the buffer seal 530 represents the extent to which the buffer seal 530 protrudes beyond the trepan groove 520 .

In an embodiment of the present invention, the pressure value S1 of the cushioning seal 530 may be in the range of 0.1 to 0.4 mm.

If the pressure value S1 of the buffer seal 530 is formed to a value that is too small to fall short of the above-described range, the amount of compression of the buffer seal 530 may be reduced and airtight performance may be weakened. Conversely, if the pressing value S1 of the buffer sealing 530 is formed to a value that is too high exceeding the above-mentioned range, the compression of the buffer sealing 530 is too much, resulting in deformation or chewing of the buffer sealing 530. Problems may arise, and confidential performance may also be deteriorated due to damage.

Next, based on the width (W) and depth (D) of the trepan groove 520 and the diameter (T) of the buffer sealing ring 530, the compression ratio (S2) of the buffer sealing ring 530 is calculated by the following equation can be defined

S2 = T-D/T

The compression rate (S2) of the buffer seal 530 represents the degree to which the discharge lead 430 presses the buffer seal 530 and compresses it.

In an embodiment of the present invention, the compression rate (S2) of the buffer sealing 530 may be in the range of 5 to 20%.

If the compression ratio is too small because it falls short of the above-mentioned range, the impact sound reduction effect by the discharge lead 430 may be reduced. Conversely, if the compression rate exceeds the above-described range and is too large, the amount of deformation of the buffer seal 530 must be increased, which may affect durability. If the durability is damaged, the impact sound mitigation effect is reduced.

Next, based on the width (W) and depth (D) of the trepan groove 520 and the diameter (T) of the buffer seal 530, the filling factor (S3) of the buffer seal 530 is calculated by the following equation can be defined

S3 = (πT ² /4)/(W×D)

The filling rate (S3) of the buffer sealing 530 is the ratio of the cross-sectional area (πT ² /4) of the buffer sealing 530 to the cross-sectional area (W × D) of the trepan groove 520, the buffer sealing 530 When compressed, it indicates the degree occupied inside the trepan groove 520.

In an embodiment of the present invention, the filling factor S3 of the buffer sealing 530 may be in the range of 65 to 85%.

If the filling rate is too small due to less than the above-described range, the buffer sealing 530 may move inside the trepan groove 520, affecting durability (tearing, etc.) of the buffer sealing 530. Conversely, if the filling rate is too large beyond the above-mentioned range, problems such as the buffer sealing 530 falling out or being torn inside the trepan groove 520 may occur. In this case, the airtightness of the buffer sealing 530 Problems such as poor performance or the discharge port 210 not being completely closed may occur.

Based on the configuration described above, the present invention can reduce blow noise by mitigating blows between the discharge port 210 and the discharge lead 430 when opening and closing the discharge port 210, thereby increasing product satisfaction. In addition, as the blow is relieved, the life of the parts of the fixed scroll 200 and the discharge lead 430 can be extended.

The foregoing is merely representative of a specific embodiment of a scroll compressor.

Therefore, it should be noted that those skilled in the art can easily understand that the present invention can be substituted or modified in various forms without departing from the spirit of the present invention described in the claims below. do.

100: electric compressor
110: casing 111: center housing
111a: annular wall 111b: first bulkhead
111c: second bulkhead 111d: first support groove
112: front housing 113: rear housing
114a: shaft hole 114b: second support groove
120: motor 121: stator
122: rotor 130: drive shaft
130a: one end of the drive shaft 130b: the other end of the drive shaft
142: turning scroll 142a: boss part
142b: compression surface of orbiting scroll 142c: orbiting wrap
142d: turning plate part 150: inverter
160: bush 171: first bearing
172: second bearing 173: third bearing
190: connection pin
200: fixed scroll 210: discharge port
211: main port 213: sub port
220: recessed groove 230: lead contact
241: fixed end plate 242: compression surface of fixed scroll
243: fixed wrap 250: sealing home
300: sealing member
400: opening and closing part 410: bolt
420: retainer 430: discharge lead
431: Main lead 433: Sub lead
500: buffer means 510: extension groove
520: trepan home 530: buffer sealing
540: connection sealing

Claims (12)

A casing including a discharge chamber for sucking in refrigerant therein and discharging compressed refrigerant through a compression mechanism;
A fixed scroll engaged with the orbiting scroll to form a compression chamber;
a discharge port formed on the fixed scroll and through which the refrigerant compressed in the compression chamber is discharged;
an opening and closing portion disposed on the fixed scroll and opening and closing the discharge port; and
a shock absorber disposed at least partially along the circumference of the discharge port and mitigating impact between the opening and closing portion and the discharge port;
A scroll compressor comprising a.
According to claim 1,
The opening part,
One side of the retainer fixed to the fixed scroll with a bolt; and
a discharge lead formed on the other side of the retainer and contacting a lead contact portion formed around the discharge port;
A scroll compressor comprising a.
According to claim 2,
The fixed scroll and the rear housing together form a discharge chamber,
The scroll compressor further comprises a sealing member disposed between the fixed scroll and the rear housing to seal the discharge chamber.
According to claim 3,
A partition wall formed to surround the discharge chamber is formed in the rear housing, and a sealing groove in which a sealing member is seated is formed in at least one of the partition wall and the side of the fixed scroll facing the partition wall.
According to claim 3,
The buffer means,
an extension groove connected to the sealing groove and extending to the discharge port;
a trepan groove connected to the extension groove and disposed along the circumference of the discharge port;
an extension seal connected to the seal member and inserted into the extension groove; and
A buffer seal connected to the extension seal and inserted into the trepan groove and disposed;
The scroll compressor, characterized in that, when the discharge lead closes the discharge port, the discharge lead contacts the buffer sealing before the lead contact portion to relieve a blow.
According to claim 5,
Scroll compressor, characterized in that the diameter (T) of the buffer seal is larger than the depth (D) of the trepan groove.
According to claim 5,
Based on the width (W) and depth (D) of the trepan groove and the diameter (T) of the buffer sealing,
The scroll compressor, characterized in that the pressed value (S1) of the buffer sealing is determined by S1 = TD.
According to claim 5,
Based on the width (W) and depth (D) of the trepan groove and the diameter (T) of the buffer sealing,
The scroll compressor, characterized in that the compression ratio (S2) of the buffer sealing is determined by S2 = TD / T.
According to claim 5,
Based on the width (W) and depth (D) of the trepan groove and the diameter (T) of the buffer sealing,
The scroll compressor, characterized in that the filling factor (S3) of the buffer sealing is determined by S3 = (πT ² /4) / WD.
According to claim 5,
The discharge port,
a main port formed on the fixed scroll, connected to the compression chamber, and discharging the refrigerant compressed in the orbiting scroll and the fixed scroll; and
a sub port formed on the fixed scroll and connected to the compression chamber, and configured to additionally discharge compressed refrigerant when the compression chamber formed by the orbiting scroll and the fixed scroll exceeds a preset pressure;
A scroll compressor comprising a.
According to claim 10,
The discharge lead,
a main lead connected to the retainer and opening and closing the main port; and
a sub-lead connected to the retainer and opening and closing the sub-port;
A scroll compressor comprising a.
According to claim 2,
The scroll compressor further comprises a recessed groove formed at a position corresponding to the retainer and the discharge lead in the fixed scroll.

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