KR102500647B1 - Compressor - Google Patents

Abstract

The present invention relates to a compressor, comprising: a casing having a suction chamber and a discharge chamber; a compression mechanism for sucking in the refrigerant from the suction chamber, compressing the refrigerant, and discharging the refrigerant into the discharge chamber; and a heavy material formed of a material having a higher specific gravity than the casing and fastened to a wall portion of the discharge chamber of the casing; thereby preventing vibration of the casing due to the pressure of the refrigerant in the discharge chamber, thereby reducing noise and vibration. In addition, the weight, the body forming the exterior; and an oil separation channel formed inside the body, thereby sufficiently separating the oil from the refrigerant to prevent oil from leaking out of the compressor and reducing the amount of oil in the compressor.

Description

Compressor {COMPRESSOR}

The present invention relates to a compressor.

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.

That is, the compressor includes a casing having a suction chamber and a discharge chamber, and a compression mechanism for sucking in, compressing, and discharging refrigerant from the suction chamber, and discharging the refrigerant to the discharge chamber. It is formed by rotary type, scroll type, etc.

Meanwhile, the compressor includes an oil separator for separating oil from the refrigerant discharged into the discharge chamber and an oil return passage for returning the oil separated from the refrigerant to the suction chamber.

Here, the oil separator and the oil return passage are formed in a rear housing having a discharge chamber, as shown in FIG. 1 .

That is, the conventional rear housing 130 includes a discharge chamber S3 in which the refrigerant discharged from the compression mechanism is accommodated, an oil separation space (not shown) communicating with the discharge chamber S3 through a hole, and the oil separation space An oil separator (not shown) provided in (not shown) and separating oil from the refrigerant introduced from the discharge chamber (S3) and an oil return passage for returning the oil collected in the oil separation space (not shown) to the suction chamber ( include P).

However, in such a conventional compressor, the casing (more precisely, the rear housing) vibrates due to the pressure of the refrigerant in the discharge chamber, resulting in deterioration of noise and vibration.

In addition, although the oil separator is provided, the oil is not sufficiently separated from the refrigerant, so that the oil leaks out of the compressor and the amount of oil in the compressor decreases.

Republic of Korea Patent Publication No. 10-2018-0062314

Accordingly, an object of the present invention is to provide a compressor capable of reducing noise and vibration by preventing vibration of the casing due to refrigerant pressure in the discharge chamber.

Another object of the present invention is to provide a compressor capable of sufficiently separating oil from a refrigerant to prevent leakage of oil to the outside of the compressor and to prevent a decrease in the amount of oil in the compressor.

The present invention, in order to achieve the object as described above, a casing having a suction chamber and a discharge chamber; a compression mechanism for sucking in the refrigerant from the suction chamber, compressing the refrigerant, and discharging the refrigerant into the discharge chamber; and a heavy material formed of a material having a higher specific gravity than the casing 100 and coupled to a wall portion of the discharge chamber of the casing.

The heavy body, the body forming the exterior; and an oil separation channel formed inside the body.

The body may be formed of a material having a higher specific gravity than the casing.

The oil separation passage may include a first hole for guiding the refrigerant in the discharge chamber to the oil separation passage; a collision wall facing the outlet of the first hole; a second hole colliding with the collision wall and discharging oil separated from the refrigerant; and a third hole that collides with the collision wall and discharges the refrigerant from which the oil is separated.

The body may include a first portion where the first hole and the collision wall are formed; a second portion where the second hole is formed; and a third portion where the third hole is formed, wherein the first portion may have a larger volume than the second portion and the third portion.

An annular member extending along an inner circumferential surface of the third hole may be formed in the third hole, and an inner diameter of the annular member may be smaller than an inner diameter of the third hole.

A stepped surface may be formed between the entrance of the third hole and the collision wall.

A fastening member fastening the heavy object to the casing may be further included, and the fastening member may be formed to pass through the oil separation passage.

The fastening member is formed in plurality, some of the plurality of fastening members pass through the oil separation passage in a direction opposite to the gravity with respect to the first hole, and the rest of the plurality of fastening members are based on the first hole. It may be formed to pass through the oil separation passage in the direction of gravity.

A fastening member fastening the heavy object to the casing may be further included, and the fastening member may pass through the heavy object bypassing the oil separation passage and be fastened to the casing.

The body includes a fastening surface facing the discharge chamber-side wall of the casing, the fastening surface includes a spaced surface spaced apart from the discharge chamber-side wall of the casing, and the inlet of the first hole is formed on the spaced surface. It can be.

An oil return passage for recovering the oil discharged from the second hole to the suction chamber may be further included.

An oil separator separating oil from the refrigerant discharged from the third hole may be further included, and the oil separated by the oil separator may flow into the oil return passage.

A compressor according to the present invention includes a casing having a suction chamber and a discharge chamber; a compression mechanism for sucking in the refrigerant from the suction chamber, compressing the refrigerant, and discharging the refrigerant into the discharge chamber; and a heavy material formed of a material having a higher specific gravity than the casing and fastened to a wall portion of the discharge chamber of the casing; thereby preventing vibration of the casing due to the pressure of the refrigerant in the discharge chamber, thereby reducing noise and vibration.

In addition, the weight, the body forming the exterior; and an oil separation channel formed inside the body, thereby sufficiently separating the oil from the refrigerant to prevent oil from leaking out of the compressor and reducing the amount of oil in the compressor.

1 is a front view showing a rear housing in a conventional compressor;
2 is a cross-sectional view showing a compressor according to an embodiment of the present invention;
3 is a front view showing a rear housing and a heavy object in the compressor of FIG. 2;
4 is a cross-sectional view showing a rear housing and a heavy object in a compressor according to another embodiment of the present invention;
5 is a front view showing a rear housing and a heavy object of FIG. 4;
6 is a cross-sectional view showing a rear housing and a heavy object in a compressor according to another embodiment of the present invention;
7 is a front view showing a rear housing and a heavy object of FIG. 6;
Figure 8 is a rear view showing the heavy object of Figure 7;
9 is a cross-sectional view showing a rear housing and a heavy object in a compressor according to another embodiment of the present invention;
FIG. 10 is a front view illustrating the rear housing and the heavy object of FIG. 9 .

Hereinafter, <name> according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a cross-sectional view of a compressor according to an embodiment of the present invention, and FIG. 3 is a front view of a rear housing and a heavy object in the compressor of FIG. 2 .

Referring to FIGS. 2 and 3, the compressor according to an embodiment of the present invention has a casing 100 having a suction chamber S1 and a discharge chamber S3, and sucks refrigerant from the suction chamber S1. and a compression mechanism 200 for compressing and discharging to the discharge chamber S3, and a heavy object 300 for preventing the casing 100 from shaking due to the refrigerant pressure in the discharge chamber S3.

The casing 100 may include a first housing having the suction chamber S1 and a second housing combined with the first housing and having the discharge chamber S3.

The first housing includes a center housing 110 on which a main frame 112 is formed and a front housing 120 fastened to the center housing 110 to form the suction chamber S1, and the main frame A suction hole (not shown) may be formed in 112 to guide the refrigerant in the suction chamber S1 to the compression mechanism 200 .

The second housing includes a fixed scroll 230 fastened to the center housing 110 on the opposite side of the front housing 120 based on the center housing 110 and the center based on the fixed scroll 230. A rear housing 130 coupled to the fixed scroll 230 at an opposite side of the housing 110 to form the discharge chamber S3 may be included.

Here, in the case of the present embodiment, the fixed scroll 230 is formed to form the second housing as well as the compression mechanism 200, but is not limited thereto, and the rear housing 130 is attached to the center housing 110 It may be coupled to form the second housing, and the fixed scroll 230 may be accommodated inside the second housing to form the compression mechanism 200 .

Meanwhile, the casing 100 separates oil from the refrigerant discharged from the compression mechanism 200, guides the refrigerant from which the oil is separated to the outside of the compressor, and transfers the oil separated from the refrigerant to the suction chamber S1. It can be formed to return to.

Specifically, when the compressor is driven, for example, oil supply for lubrication is required for sliding parts such as between the fixed scroll 230 and the orbiting scroll 220 to be described later, and this oil supply is made by the flow of the refrigerant. can That is, oil is stored in the suction chamber (S1), and the oil in the suction chamber (S1) flows together with the refrigerant and can be discharged to the discharge chamber (S3) after lubricating various sliding parts.

However, when the oil contained in the refrigerant discharged into the discharge chamber (S3) is discharged to the outside of the compressor together with the refrigerant without being separated from the refrigerant, the amount of oil inside the compressor is reduced, so that various sliding parts of the compressor are smoothly lubricated. Failure to do so may result in increased friction loss and damage such as sticking.

In consideration of this, the compressor according to the present embodiment separates oil from the refrigerant discharged from the compression mechanism 200, returns the refrigerant from which the oil is separated to the outside of the compressor, and transfers the separated oil from the refrigerant to the suction chamber. It can be formed to return to (S1).

More specifically, an oil separation space S4 communicating with the discharge chamber S3 is formed in the rear housing 130 through an oil separation passage 320 to be described later of the heavy object 300, and the oil separation space (S4) may be provided with an oil separator 400 for cyclonic movement of the refrigerant containing oil.

And, the oil separation space (S4) may be in communication with the oil return passage (P) for returning the oil collected in the oil separation space (S4) to the suction chamber (S1).

The oil return passage P may be formed by communicating a plurality of segmented passage holes. That is, the oil return passage P is formed in the first passage hole 132 formed in the rear housing 130 and communicating with the oil separation space S4, the fixed scroll 230, and the heavy object ( 300), a second passage hole 232 communicating with the first passage hole 132 through an oil separation passage 320 to be described later, formed in the center housing 110, and It is in communication and may include a third passage hole 114 communicating with the suction chamber (S1).

The compression mechanism 200 is engaged with a motor 210 that generates a rotational force, an orbiting scroll 220 that rotates by receiving rotational force from the motor 210, and the orbiting scroll 220 to form a pair of two It may include the fixed scroll 230 forming the compression chamber (S2).

The motor 210 includes a stator 212, a rotor 214 rotated by interaction with the stator 212 inside the stator 212, and a rotation shaft 216 fastened to the rotor 214. can include

The stator 212 and the rotor 214 are accommodated in the suction chamber S1, and the rotation shaft 216 penetrates the main frame 112 to the discharge chamber from the suction chamber S1 side. S3) may be extended to the side.

The orbiting scroll 220 is interposed between the main frame 112 and the fixed scroll 230, supported by the main frame 112, and receives rotational force from the motor 210 through the rotation shaft 216. It may be received and formed to be capable of turning motion.

Here, in the case of this embodiment, the compression mechanism 200 is formed in a so-called electric scroll method, but is not limited thereto. That is, the compression mechanism 200 may be formed in a so-called swash plate method having, for example, a swash plate rotated by receiving driving force from an engine of a vehicle and a piston reciprocating in communication with the swash plate.

The heavy object 300 may include a body 310 that forms an exterior of the heavy object 300 and is fastened to the wall portion 134 of the rear housing 130 at the side of the discharge chamber S3.

The body 310 may be formed to be fastened to the wall portion 134 of the discharge chamber S3 side of the rear housing 130 by a fastening member 500 such as a bolt. Here, the fastening member 500 may be formed not to penetrate an oil separation passage 320 to be described later in order to easily prevent leakage of the oil separation passage 320 to be described later. That is, the fastening member 500 may bypass the oil separation passage 320 to be described later, pass through the heavy object 300, and be fastened to the wall portion 134 of the discharge chamber S3 side of the rear housing 130. .

The body 310 is located on the side of the discharge chamber S3 of the rear housing 130 so as to obtain an effect of increasing the mass of the wall portion 134 of the discharge chamber S3 side of the rear housing 130. It may be formed of a material having a higher specific gravity than the wall portion 134 .

In addition, the body 310 has a first part 310a where a first hole 322 to be described later and a collision wall 324 to be described later are formed, and a second part 310a where a second hole 326 to be described later is formed ( 310b) and a third portion 310c where a third hole 328 to be described later is formed, and the first portion 310a is the second portion to effectively separate oil from an oil separation passage 320 to be described later. (310b) and the third portion (310c) may be formed larger in volume.

Meanwhile, the heavy object 300 is formed inside the body 310 to prevent vibration of the rear housing 130 and to separate oil from the refrigerant discharged from the compression mechanism 200 An oil separation passage 320 may be further included.

The oil separation passage 320 includes a first hole 322 for guiding the refrigerant in the discharge chamber S3 to the oil separation passage 320 and a collision wall (opposed to the outlet of the first hole 322) 324), a second hole 326 that collides with the collision wall 324 and discharges the oil separated from the refrigerant, and a third hole 328 that collides with the collision wall 324 and discharges the refrigerant separated from the oil can include

The second hole 326 may communicate with the first passage hole 132 and the second passage hole 232 , and the third hole 328 may communicate with the oil separation space S4 .

Meanwhile, an annular member 600 extending along an inner circumferential surface of the third hole 328 is formed in the third hole 328, and the inner diameter of the annular member 600 is the inner diameter of the third hole 328. can be made smaller.

Hereinafter, operational effects of the compressor according to the present embodiment will be described.

That is, when power is applied to the motor 210 , the rotating shaft 216 may transmit rotational force to the orbiting scroll 220 while rotating together with the rotor 214 .

Also, since the orbiting scroll 220 performs a orbital motion by the rotary shaft 216, the volume of the compression chamber S2 can be reduced while continuously moving toward the center.

Then, the refrigerant from the outside of the compressor flows into the suction chamber S1 through the refrigerant suction pipe (not shown), and the refrigerant in the suction chamber S1 enters the compression chamber S2 through the suction hole (not shown). can be inhaled.

The refrigerant sucked into the compression chamber (S2) may be compressed while moving toward the center along a moving path of the compression chamber (S2) and discharged to the discharge chamber (S3).

The refrigerant discharged into the discharge chamber (S3) passes through the oil separation passage 320 of the heavy object 300 and the oil separation space (S4), and after the oil contained in the refrigerant is separated, it can be discharged to the outside of the compressor. there is.

Specifically, the refrigerant discharged into the discharge chamber (S3) flows into the oil separation passage 320 through the first hole 322, and the refrigerant flowing into the oil separation passage 320 flows into the collision wall ( 324) and the refrigerant and oil may be primarily separated.

The refrigerant from which the oil is separated by colliding with the collision wall 324 flows through the annular member 600, and the refrigerant and the oil may be secondarily separated. That is, oil collided with the collision wall 324 but still contained in the refrigerant may be separated from the refrigerant by the annular member 600 .

The oil separated from the refrigerant by the collision wall 324 and the annular member 600 is sucked through the second hole 326, the second passage hole 232, and the third passage hole 114. It can be returned to room S1.

Also, the refrigerant from which oil is separated by the collision wall 324 and the annular member 600 may flow into the oil separation space S4 through the third hole 328 .

The refrigerant introduced into the oil separation space (S4) is cyclone-moved by the oil separator 400, and the refrigerant and oil may be separated three-dimensionally. That is, oil passed through the oil separation passage 320 but still contained in the refrigerant may be separated from the refrigerant by the oil separator 400 .

The oil separated from the refrigerant by the oil separator 400 is collected at the bottom of the oil separation space S4, and then the first flow hole 132, the second hole 326, and the second flow hole ( 232) and the third passage hole 114 may return to the suction chamber S1.

Also, the refrigerant from which oil is separated by the oil separator 400 may be discharged to the outside of the compressor through a refrigerant discharge pipe (not shown).

Here, the refrigerant in the discharge chamber (S3) has a considerably high pressure and has a pulsation associated with the operation of the compression mechanism 200, so that the rear housing 130 may vibrate.

However, in the present embodiment, as the heavy object 300 formed of a material having a higher specific gravity than the rear housing 130 is fastened to the wall portion 134 of the discharge chamber S3 side of the rear housing 130, the An effect of increasing the mass of the wall portion 134 on the side of the discharge chamber S3 of the rear housing 130 can be obtained. Accordingly, vibration of the rear housing 130 caused by the refrigerant in the discharge chamber S3 is suppressed, and noise and vibration may be improved.

In addition, as the oil separation passage 320 is formed inside the heavy object 300, oil can be sufficiently separated from the refrigerant. That is, when only the oil separator 400 is provided as in the prior art, there may be oil that cannot be separated even by the oil separator 400, but in the present embodiment, the oil separator 400 as well as the oil separation passage ( 320), it is possible to separate oil that cannot be separated from the refrigerant by the oil separator 400. Accordingly, leakage of oil to the outside of the compressor can be prevented, and a decrease in the amount of oil in the compressor can be prevented.

In addition, as the annular member 600 is provided in the oil separation passage 320, oil leakage and reduction in oil amount can be more effectively prevented.

On the other hand, in the case of the present embodiment, the annular member 600 is included to improve oil separation performance inside the heavy object 300, but is not limited thereto.

That is, for example, as shown in FIGS. 4 and 5, instead of the annular member 600 being omitted, for example, the entrance of the third hole 328 is the inner circumferential surface of the first hole 322. The inlet of the third hole 328 may be formed to be spaced apart from the collision wall 324 . That is, a stepped surface 327 may be formed between the entrance of the third hole 328 and the collision wall 324 . In this case, the oil collided with the collision wall 324 but still contained in the refrigerant may be separated from the refrigerant by the stepped surface 327 .

Alternatively, the body 310 includes a fastening surface 312 opposite to the wall portion 134 of the discharge chamber S3 side of the rear housing 130, and as shown in FIGS. 6 to 8, the fastening surface 312 is formed to include a spaced surface 312a spaced apart from the side wall 134 of the discharge chamber S3 of the casing 100, and the entrance of the first hole 322 is formed on the spaced surface 312a can be formed in In this case, the refrigerant in the discharge chamber S3 may first collide with the wall portion 134 on the side of the discharge chamber S3 of the rear housing 130 and then flow into the oil separation passage 320 . Accordingly, the oil is separated by the wall portion 134 of the discharge chamber S3 side of the rear housing 130, and the oil is not separated by the wall portion 134 of the discharge chamber S3 side of the rear housing 130. Oil passes through the oil separation passage 320 and is separated from the refrigerant, so that oil separation performance can be improved. Here, a passage hole (not shown) is formed in the rear housing 130 to guide the oil separated by the wall portion 134 on the side of the discharge chamber S3 of the rear housing 130 to the oil return passage P. It may be desirable to be

Alternatively, as shown in FIGS. 9 and 10 , the fastening member 500 for fastening the heavy object 300 to the rear housing 130 may be formed to pass through the oil separation passage 320 . . In this case, oil collided with the collision wall 324 but still contained in the refrigerant is absorbed by the fastening member 500 and can be separated from the refrigerant. Here, in order to improve the oil separation effect by the fastening member 500, the fastening member 500 is formed in plurality, and some of the plurality of fastening members 500 are based on the first hole 322. passes through the oil separation passage 320 from the side opposite to gravity, and the rest of the plurality of fastening members 500 pass through the oil separation passage 320 from the side in the direction of gravity based on the first hole 322 can be formed through

Alternatively, although not shown separately, the above-described embodiments may be combined. That is, the first hole 322 is formed on the separation surface 312a, and the annular member 600 and the stepped surface 327 as well as the collision wall 324 are formed inside the oil separation passage 320. ) is formed, and the fastening member 500 may be formed to pass through the oil separation passage 320 . In this case, oil separation performance can be maximized.

Meanwhile, in this embodiment, the oil separation passage 320 and the oil separator 400 are provided together, but only the oil separation passage 320 may be provided. In this case, the oil separation performance may be slightly deteriorated, but the oil separator 400 and the oil separation space S4 are deleted, so that the size, weight and cost of the compressor can be reduced.

100: casing 134: wall part
200: compression mechanism 300: heavy goods
310: body 312: fastening surface
312a: separation surface 320: oil separation path
322: first hole 324: collision wall
326: second hole 327: step surface
328: third hole 400: oil separator
500: fastening member 600: annular member
S1: suction chamber S3: discharge chamber

Claims (12)

Casing 100 having a suction chamber (S1) and a discharge chamber (S3);
a compression mechanism (200) for sucking in and compressing the refrigerant from the suction chamber (S1) and discharging it to the discharge chamber (S3); and
Including,
The weight 300 is a compressor including a body 310 forming an exterior and an oil separation passage 320 formed inside the body 310. delete According to claim 1,
The oil separation passage 320,
a first hole 322 for guiding the refrigerant in the discharge chamber S3 to the oil separation passage 320;
a collision wall 324 facing the outlet of the first hole 322;
a second hole 326 that collides with the collision wall 324 and discharges oil separated from the refrigerant; and
Compressor comprising a; third hole (328) for discharging the refrigerant from which the oil is separated and colliding with the collision wall (324). According to claim 3,
The body 310,
a first portion 310a where the first hole 322 and the collision wall 324 are formed;
a second portion 310b where the second hole 326 is formed; and
A third portion 310c where the third hole 328 is formed; includes,
The first part (310a) has a larger volume than the second part (310b) and the third part (310c). According to claim 3,
An annular member 600 extending along an inner circumferential surface of the third hole 328 is formed in the third hole 328,
The inner diameter of the annular member (600) is smaller than the inner diameter of the third hole (328). According to claim 3,
A stepped surface 327 is formed between the inlet of the third hole 328 and the collision wall 324. According to claim 3,
Further comprising a fastening member 500 for fastening the heavy object 300 to the casing 100,
Compressor, characterized in that the fastening member (500) passes through the oil separation passage (320). According to claim 7,
The fastening member 500 is formed in plurality,
Some of the plurality of fastening members 500 pass through the oil separation passage 320 from a side opposite to gravity with respect to the first hole 322,
The rest of the plurality of fastening members 500 pass through the oil separation passage 320 in the gravitational direction with respect to the first hole 322. According to claim 3,
Further comprising a fastening member 500 for fastening the heavy object 300 to the casing 100,
The fastening member (500) bypasses the oil separation passage (320), passes through the heavy object (300), and is fastened to the casing (100). According to claim 3,
The body 310 includes a fastening surface 312 opposite to the wall portion 134 of the discharge chamber (S3) side of the casing 100,
The fastening surface 312 includes a spaced surface 312a spaced apart from the wall portion 134 of the discharge chamber S3 of the casing 100,
An inlet of the first hole 322 is formed on the separation surface 312a. According to claim 3,
The compressor further comprises an oil return passage (P) for recovering the oil discharged from the second hole (326) to the suction chamber (S1). According to claim 11,
An oil separator 400 separating oil from the refrigerant discharged from the third hole 328 is further included,
Compressor formed so that the oil separated by the oil separator (400) flows into the oil return passage (P).

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