KR102118601B1 - Suction damping device of compressor - Google Patents

Abstract

The present invention relates to a device for reducing the suction pulsation of a compressor, and a valve plate (20) having a suction lead (21) is inserted into the suction port (11) and damped by elasticity of the suction lead (21). This is prevented. The number of parts is reduced, thereby reducing the weight and manufacturing cost.

Description

Compressor suction pulsation reduction device {SUCTION DAMPING DEVICE OF COMPRESSOR}

The present invention relates to a suction pulsation reduction device for a compressor, and more particularly, to a suction pulsation reduction device for a compressor installed in a suction port of a rear head where refrigerant is sucked into the compressor to reduce the suction pulsation of the refrigerant.

Compressors, which serve to compress refrigerant in a vehicle indoor cooling system, have been developed in various forms. In the compressor, there are two types of compressors: a reciprocating type that performs compression while reciprocating and a rotary type that performs compression while rotating. In the reciprocating type, there are a crank type in which the driving force of the driving source is transmitted to a plurality of pistons using a crank, a swash plate type in which a plurality of pistons are connected to a swash plate, and a wobble plate type using a wobble plate. There are vane rotary type using, scrolling type using orbiting scroll and fixed scrolling.

The swash plate type compressor has a fixed capacity type and a variable capacity type, and the fixed capacity type is equipped with a pulley electronic clutch to control the driving of the compressor. When the compressor is driven or stopped, the vehicle RPM flows to ensure stable vehicle operation. There are disadvantages that interfere with it.

Therefore, in recent years, an electronic clutch is not provided, and it is always driven with the driving of the engine of the vehicle, and a variable-capacity type that can change the discharge capacity by changing the inclination angle of the swash plate is widely used. In general, a pressure regulating valve for adjusting the inclination angle of the swash plate is used in such a variable capacity type swash plate compressor.

As shown in Figure 1, the swash plate type compressor is largely composed of a housing 100, a rotating shaft 200, a swash plate 300, and a plurality of pistons 400.

The housing 100 is a part that forms the outer body of the swash plate type compressor, and a cylinder chamber 110 accommodating the rotating shaft 200, the swash plate 300, and the plurality of pistons 400 is formed therein, during the suction stroke. Intake passages 121 and 122 for supplying refrigerant to the cylinder chamber 110 are formed, and a discharge passage 140 through which the refrigerant in the cylinder chamber 110 is discharged during the compression stroke is formed.

A suction port 130 through which refrigerant is introduced from the outside is formed at the front ends of the suction passages 121 and 122, and a suction check valve 500 is inserted into the suction passages 121 and 122. The suction check valve 500 not only regulates the suction refrigerant, but also serves to prevent pulsation due to fluctuations in the flow rate and pressure of the suction refrigerant, and thus is referred to as a suction pulsation reduction device, that is, a suction damping device (SDD). The suction check valve installed in the suction path of the compressor will be referred to as a suction pulsation reduction device.)

The rotating shaft 200 is a means for transmitting the rotating driving force of the external drive source to the interior of the compressor, and receives external rotating driving force through the pulley 250 mounted on one end of the rotating shaft 200 to rotate.

The swash plate 300 is a means for converting the rotational driving force of the rotating shaft 200 into a reciprocating linear motion of the piston 400, and is mounted in an inclined state on the rotating shaft 200 to rotate together with the rotating shaft 200. At this time, a plurality of pistons 400 are mounted on the edge portion of the swash plate 300 via a shoe 310, and the piston 400 is a straight line inside the cylinder chamber 110 as the swash plate 300 rotates. It will move back and forth.

The swash plate 300 can adjust its inclination angle, so when the inclination angle of the swash plate 300 relative to the rotating shaft 200 is 90ㅀ as shown in FIG. 2, the piston 400 does not reciprocate even when the swash plate 300 rotates. Intake, compression, and discharge of the refrigerant is not made. On the contrary, when the swash plate 300 is inclined with respect to the rotating shaft 200, the piston 400 sucks the refrigerant while reciprocating within the cylinder chamber 110, Compressed and discharged.

As illustrated in FIG. 3, the suction pulsation reduction device 500 is a circular ring-shaped body 510 having a suction port 511 and a cylindrical component coupled to the body 510, and has a plurality of discharge ports 521 on the side surfaces. The case 520 is formed, the core 530 and the core (530) that is built in the case 520 to connect and block the suction port 511 and the discharge port 521 by opening and closing the suction port 511 to interrupt the refrigerant flow. And a spring 540 elastically supporting the 530. In addition, a plurality of core grooves 531 are formed in the axial direction at equal intervals on the outer circumferential surface of the core 530.

Therefore, when the air conditioner switch is turned on and the compressor operates, the suction port 511 is opened while the core 530 is retracted by a pressure difference between the core 530 and the refrigerant flowing into the suction port 511 to discharge the refrigerant through the discharge port 521 Then, it can be sucked into the cylinder chamber 110 through the suction passage 122. In addition, when the air conditioner switch is turned off and the compressor is stopped, the refrigerant pressure is not applied to the suction port 511, so that the core 530 is returned to the original position by the spring 540 to block the suction port 511, so that the suction of the refrigerant is stopped.

When the refrigerant is sucked through the suction pulsation reducing device 500 as described above, the core 530 is elastically supported by the spring 540, so the spring 540 even if the pressure at the suction port 511 side fluctuates rapidly. Since damping by) is made, the impact due to pressure fluctuation is alleviated and pulsation is prevented. Therefore, since vibration and noise generation of the compressor due to pulsation is prevented, vibration and noise transmitted from the compressor to the vehicle interior are reduced.

In particular, even when the pressure applied to the intake port 511 is insignificant in the low flow rate section, even when the opening amount of the core 530 is small, the refrigerant is smoothly sucked through the core groove 531 to generate noise due to vibration and vibration of the core 530 Can be prevented.

Such a suction pulsation reduction device is disclosed in Korean Patent Publication No. 10-2011-062109.

On the other hand, one of the key elements of automobile development is improving fuel efficiency, and each device mounted on the vehicle also simplifies the structure, reduces the number of parts, reduces weight, and seeks to reduce manufacturing cost.

This is the same for the compressor, which is one component of the air conditioning system, and in accordance with this development trend, it is necessary to develop a new and simple configuration that can also reduce the weight and manufacturing cost of the suction pulsation reducing device.

Accordingly, the present invention has been made in accordance with the above-mentioned needs, and has an object of providing a device for reducing suction pulsation of a compressor having a simpler structure and a reduced number of parts, thereby reducing weight and manufacturing cost.

The present invention for achieving the above object, a valve plate having a suction port for connecting the suction chamber of the outside and the inside of the rear head, and a suction lead which is inserted into the suction port and has resistance to refrigerant flow. It includes.

A valve plate seating end is formed on an inner circumferential surface of the suction port to limit movement of the valve plate toward the inside of the suction port.

A snap ring is installed on the inner circumferential surface of the suction port to limit movement of the valve plate toward the outside of the suction port.

A lead stopper is formed on the inner circumferential surface of the suction port when the suction lead of the valve plate is bent in the inward direction of the suction port.

At the free end of the suction lead, a locking end hooked to the lead stopper is protruded.

The straight line formed by the center line of the engaging end and the end surface of the lead stopper has a mutually perpendicular relationship.

According to the present invention as described above, there is provided a suction pulsation reducing device having a very simple configuration consisting of a valve plate and a snap ring.

Since the number of parts is only two valve plates and snap rings, the manufacturing, handling, and assembly of parts is simplified, which significantly reduces the overall manufacturing cost of the device.

In particular, the valve plate and the snap ring are thin metal plates and rings, which are light in weight, which greatly reduces the overall weight of the device.

The suction pulsation reduction device according to the present invention is damped by deformation and restoration of an elastic suction lead, and when the suction lead rapidly repeats deformation and restoration in a low flow rate section, the suction lead does not collide with surrounding parts. Chattering noise in the flow section is prevented.

1 is a configuration diagram of a swash plate type compressor, in which the swash plate is inclined.
2 is a configuration diagram of a swash plate type compressor in a state in which the swash plate is upright.
Figure 3 is a partial cut-away perspective view of a suction pulsation reduction device according to the prior art.
Figure 4 is a front view of the installation state of the suction pulsation reduction device according to the present invention (looking inside from the outside of the suction port).
Figure 5 is a perspective view of the installation of the suction pulsation reduction device according to the present invention.
Figure 6 is a side view of the installation state of the suction pulsation reduction device according to the present invention.
7 is an operation state diagram of the suction pulsation reduction device as a corresponding view of FIG.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. The thickness of the lines or the size of components shown in the accompanying drawings may be exaggerated for clarity and convenience.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or precedent. Therefore, definitions of these terms should be made based on the contents throughout this specification.

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

4 to 6 are a front view, a perspective view, and a side view, respectively, of the installation state of the suction pulsation reducing device of the compressor according to the present invention. 4 to 6, the suction pulsation reducing device of the compressor according to the present invention, the suction port 11 formed through the rear head 10, and installed in the suction port 11 and installed in the refrigerant flow And a valve plate (20) having a suction lead (21) having a resistive elastic restoring force.

The rear head 10 of the compressor includes a suction chamber formed in a radially inner portion, and a discharge chamber that is divided into a suction chamber and a partition wall and surrounds the suction chamber. The suction port 11 is formed through the radial direction of the rear head 10 and is a passage connecting the outside of the rear head 10 and the suction chamber. The suction port 11 has an outlet of the evaporator connected to a refrigerant pipe, so that refrigerant gas discharged from the evaporator is supplied.

For the installation of the valve plate 20, the valve plate seating end 12 protrudes radially inward over the entire circumferential direction on the inner circumferential surface of the suction port 11. That is, the valve plate seating end 12 is a ring-shaped locking end protruding from the inner circumferential surface of the suction port 11.

The valve plate 20 is a thin disc made of metal and is inserted inward from the inlet of the suction port 11 to be caught by the valve plate seating end 12.

At a position spaced apart at least by the thickness of the valve plate 20 from the valve plate seating end 12 toward the inlet of the suction port 11, a concave snap ring groove 14 radially outwards over the entire circumference of the suction port 11 is provided. Is formed.

A snap ring 30 is installed in the snap ring groove 14 to act as a stopper, thereby preventing movement of the valve plate 20 toward the inlet of the suction port 11 to maintain the installation position of the valve plate 20.

The valve plate 20 is formed with a cutout hole 21a perforated in a predetermined shape to form a suction lead 21. The suction lead 21 is separated from the valve plate 20 by an incision hole 21a, and only one end is connected to the valve plate 20, so that the suction lead 21 is based on the valve plate ( 20) may be elastically deformed to the left and right in a direction perpendicular to the surface (ie, the flow direction of the refrigerant as the longitudinal direction of the suction port 11). This is possible because the valve plate 20 is made of a thin metal plate as described above.

By forming a through hole 21b inside the suction lead 21, the connecting portion can be formed as a separate leg part 21c, and by forming the width of the leg part 21c as desired when forming the through hole 21b, The elastic strength of the suction lead 21 can be adjusted.

On the other hand, a lead stopper (13) at which the end of the suction lead (21) is hung at a position spaced apart from the valve plate seating end (12) by a refrigerant flow direction (direction toward the inside of the rear head) from the suction port (11) ) Is formed.

On the other hand, the free end of the suction lead 21 (the part opposite to the connecting portion) is formed with a locking end 21d protruding to be caught in the lead stopper 13.

Therefore, when the refrigerant is sucked, the amount of bending of the suction lead 21 is determined by the locking jaw 13, so the position of the locking jaw 13, that is, the distance from the valve plate seating end 12 to the locking jaw 13 is appropriately set. By doing so, the flow rate of the refrigerant passage can be adjusted.

The engaging jaw 13 is sufficient if it is formed only at a portion corresponding to the free end of the suction lead 21 without having to be formed over the entire circumference of the inner circumferential surface of the suction port 11.

The center line (A-A line) of the suction lead 21 has a relationship perpendicular to the straight line (B-B) line formed by the end surface of the lead stopper 13. That is, the engaging end 21d of the suction lead 21 with respect to the lead stopper 13 has a right angle relationship, so that the engaging end 21d can be more stably caught in the lead stopper 13.

The operation and effects of the present invention will now be described.

In the air conditioner off state, the suction lead 21 is not bent toward the inside direction of the suction port 11 and forms the same plane as the other part of the valve plate 20 (state of FIG. 6).

When the air conditioner is turned on and in the initial low flow rate state, the refrigerant may be introduced into the suction chamber of the rear head through the incision hole 21a around the suction lead 21 and the through hole 21b inside the suction lead 21.

When the air conditioner load increases to increase the flow rate of the refrigerant, the suction lead 21 is bent toward the inner direction of the suction port 11 and the flow path is opened wider so that a larger amount of refrigerant can be smoothly sucked. At this time, the opening amount of the suction lead 21 is limited because the engaging end 21d is caught by the lead stopper 13.

By limiting the opening amount, excessive deformation of the suction lead 21 can be prevented to prevent permanent deformation and damage of the suction lead 21.

In addition, the opening amount can be appropriately limited, that is, the position of the lead stopper 13 can be appropriately set to adjust the refrigerant suction amount of the compressor.

On the other hand, the suction lead 21 of the valve plate 20 has an elastic repulsive force acting against the inflow direction of the refrigerant.

Therefore, when the pressure and flow rate of the refrigerant fluctuate rapidly, pulsation is not generated in the refrigerant inlet passage by damping by the suction lead 21. Therefore, vibration and noise of the compressor due to pulsation are not generated. Therefore, since the vibration and noise transmitted from the compressor to the room through the refrigerant pipe connected to the evaporator is reduced, the vehicle's indoor quietness is improved.

On the other hand, the suction pulsation reduction device according to the present invention includes only two parts: a valve plate 20 on which a suction lead 21 is formed and a snap ring 30 for fixing the position of the valve plate 20. As such, the number of parts is very small, so the configuration of the device is very simple.

In addition, since the valve plate 20 and the snap ring 30 are thin metal plates and metal rings, the weight is very low.

As described above, since the configuration is simple and the number of parts is small, the manufacturing cost of the device is greatly reduced.

On the other hand, in the coolant low flow rate section in the early stage of the air conditioner operation, the suction lead 21 rapidly repeats deformation and restoration to the original position such that the engaging end 21d is not caught by the lead stopper 13, at this time, the suction lead (21) does not come into contact with peripheral parts, so no noise is generated. Therefore, the suction pulsation reducing apparatus according to the present invention has an effect that chattering noise does not occur in a low flow rate section in the initial stage of air conditioning operation.

As described above, the present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art to which the art pertains have various modifications and other equivalent embodiments You will understand that it is possible. Therefore, the true technical protection scope of the present invention should be defined by the claims below.

10: rear head 11: suction port
12: valve plate seating end 13: lead stopper
20: valve plate 21: suction lead
21a: incision hole 21b: through hole
21c: leg part 21d: hanging end
14: snap ring groove 30: snap ring

Claims (6)

A suction port (11) communicating the suction chamber inside and outside the rear head (10);
Valve plate 20 provided in the suction port 11 and provided with a suction lead 21 having elasticity to resist refrigerant flow
Including,
A valve plate seating end 12 is formed on an inner circumferential surface of the suction port 11 to limit movement of the valve plate 20 in the inward direction of the suction port 11,
When the suction lead 21 of the valve plate 20 is bent in the inner direction of the suction port 11 on the inner circumferential surface of the suction port 11, the lead stopper 13 through which the free end of the suction lead 21 is hung The suction pulsation reduction device of the compressor, characterized in that formed. delete The method according to claim 1,
A suction ring pulsation reducing device for a compressor, characterized in that a snap ring (30) is provided on the inner circumferential surface of the suction port (11) to limit the movement of the valve plate (20) toward the outside of the suction port (11). delete The method according to claim 1,
The suction pulsation reduction device of the compressor, characterized in that the engaging end (21d) hooked to the lead stopper (13) is formed at the free end of the suction lead (21). The method according to claim 5,
The suction line pulsation reducing device of the compressor, characterized in that the center line of the engaging end (21d) and the straight line formed by the end face of the lead stopper (13) are mutually perpendicular to each other.

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