WO2012108671A2

WO2012108671A2 - Valve plate assembly of compressor

Info

Publication number: WO2012108671A2
Application number: PCT/KR2012/000892
Authority: WO
Inventors: 이건호; 김기범; 이태진; 김성용
Original assignee: 두원공과대학교; 주식회사 두원전자
Priority date: 2011-02-08
Filing date: 2012-02-07
Publication date: 2012-08-16
Also published as: WO2012108671A3; CN103380298B; CN103380298A; KR101452888B1; KR20120090529A

Abstract

A valve plate assembly of a compressor of the present invention comprises: a valve plate in which a suction port is formed; and a suction reed which opens and closes the suction port. The suction port comprises a first suction port at an inlet and a second first suction port at an outlet, wherein the area of the second first suction port is wider than that of the first suction port. Accordingly, the suction port consisting of the first and second suction ports has a wide area thereof, thereby preventing the flow rate of sucked refrigerants from increasing and minimizing the drop of pressure of the sucked refrigerants.

Description

Valve Plate Assembly of Compressor

The present invention relates to a valve plate assembly of a compressor, and more particularly to a valve plate assembly of the compressor to increase the area of the suction port to prevent the passage speed of the suction refrigerant.

Since the compressor included in the cooling system of the automotive air conditioner is directly connected to the engine through the belt, the rotation speed cannot be controlled.

Therefore, in recent years, a variable capacity compressor that can change the discharge amount of the refrigerant to obtain a cooling capacity without being regulated by the rotational speed of the engine has been used a lot.

Various types of variable displacement compressors are disclosed, such as swash plate type, rotary type and scroll type.

In the swash plate type compressor, the swash plate installed so that the inclination angle is variable in the crank chamber rotates according to the rotational motion of the drive shaft, and the piston reciprocates by the rotational motion of the swash plate. In this case, the refrigerant in the suction chamber is sucked into the cylinder by the reciprocating motion of the piston, compressed, and then discharged into the discharge chamber. Will be controlled.

In particular, it is common to adopt the solenoid type capacity control valve to adjust the pressure of the crankcase by opening and closing the valve by energization, and thereby adjusting the discharge capacity by adjusting the inclination angle of the swash plate.

At this time, the operation of the capacity control valve is calculated by a control unit in which a signal such as the detected engine speed, the temperature inside or outside the vehicle, the evaporator temperature, or the like is incorporated by the CPU, and based on the result of the calculation, the current By sending it to an electromagnetic coil.

In addition, a valve plate having suction ports and discharge ports formed therebetween is disposed between the housing and the cylinder block, and the suction port and the discharge port are opened and closed by leads.

Hereinafter, a valve plate assembly according to the prior art will be described with reference to the drawings.

1 to 2, the valve plate assembly 1 according to the related art includes a valve plate 2 having a suction port 2a and a lid 3a for opening and closing the suction port 2a. It consists of a valve seat (3) having a.

At this time, the lid 3a is connected to the valve seat 3 by a slender neck 3b having elastic force.

Accordingly, the suction port 2a is opened and closed by the lid 3a to suck the refrigerant.

However, the valve plate assembly 1 according to the related art has a problem in that the pressure decreases due to an increase in speed while the suction refrigerant is sucked into the cylinder bore through the suction port 2a having a narrow area.

At this time, the flow loss of the suction refrigerant also occurs due to the pressure drop of the suction refrigerant.

In addition, the lid 3a that opens and closes the suction port 2a increases the valve lift, resulting in noise, and at the same time takes a long time to restore the lid 3a, thereby reducing the efficiency of the compressor. It causes.

This is because the suction refrigerant passing through the narrow suction port 2a is concentrated in the lid 3a.

In addition, as the valve lift of the lid 3a increases, the dead volume also increases, so that the cooling capacity decreases.

The present invention has been made to solve the above-mentioned conventional problems, the object of the present invention is to expand the effective area of the suction port to prevent the passage speed of the suction refrigerant rises to minimize the pressure drop of the suction refrigerant To provide a valve plate assembly.

Valve plate assembly of the compressor of the present invention for achieving the above object, the valve plate is formed suction port; And a suction lead for opening and closing the suction port, wherein the suction port includes an inlet side first suction port and an outlet side second suction port, and the area of the second suction port is larger than that of the first suction port. It is characterized in that it is formed widely.

The valve plate may include a first valve plate on which the first suction port is formed and a second valve plate on which the second suction port is formed.

Preferably, the first valve plate closes a part of the inlet side of the second suction port so that the first and second suction ports are stepped.

In addition, the first suction port is formed in the form of a long hole in the circumferential direction of the valve plate, the second suction port is wrapped around the first suction port, but the circumferential circumferential direction toward the circumference of the valve plate It is preferable to include an extended protrusion.

In addition, it is preferable that two protruding portions are formed via the groove-shaped portion.

According to the valve plate assembly of the compressor according to the present invention, since the suction port composed of the first and second suction ports has a large area, the suction speed of the suction refrigerant is prevented from increasing, thereby minimizing the pressure drop of the suction refrigerant. .

In addition, it is possible to suppress the flow loss of the suction refrigerant by minimizing the pressure drop of the suction refrigerant.

In addition, as the area of the lid on which the suction refrigerant acts increases, the valve lift of the lid decreases, thereby suppressing the generation of noise.

In addition, the dead volume is also reduced by reducing the valve lift of the lid, thereby increasing the cooling efficiency.

1 is an exploded perspective view showing a valve plate assembly according to the prior art.

2 is a front view of FIG. 1.

3 is a longitudinal sectional view showing a structure of a variable displacement compressor according to the present invention.

4 is an exploded perspective view illustrating the valve plate assembly of FIG. 3.

5 is a perspective view illustrating a coupled state of FIG. 4.

6 is an enlarged perspective view of a main part of FIG. 3.

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

Figure 3 is a longitudinal sectional view showing a structure of a variable displacement compressor according to the present invention, Figure 4 is an exploded perspective view of the valve plate assembly of Figure 3, Figure 5 is a perspective view showing a combined state of Figure 4, Figure 6 3 is an enlarged perspective view of the main part of FIG. 3.

First, to explain the structure of a variable displacement swash plate type compressor installed with a valve plate assembly according to the present invention.

As shown in FIG. 3, the variable displacement swash plate type compressor C includes a cylinder block 10 having a plurality of cylinder bores 12 formed on an inner circumferential surface of the cylinder block 10 in parallel in the longitudinal direction, and the cylinder block 10 of the cylinder block 10. A front housing 16 is hermetically coupled to the front and a rear housing 18 hermetically coupled to the rear of the cylinder block 10.

The crank chamber 86 is provided inside the front housing 16, and one end of the drive shaft 44 is rotatably supported near the center of the front housing 16, while the other end of the drive shaft 44 is Passed through the crank chamber 86 is supported via a bearing provided in the cylinder block 10.

In the crank chamber 86, the lug plate 54 and the swash plate 50 are provided around the drive shaft 44.

In the lug plate 54, a pair of power transmission support arms 62 each having a linearly perforated guide hole 64 formed at a central portion thereof are formed to protrude integrally on one surface, and an end portion is formed on one surface of the swash plate 50. The arm 66 provided with the ball is formed to protrude, and as the lug plate 54 rotates, the ball provided in the arm 66 of the swash plate 50 is a guide hole of the lug plate 54. The inclination angle of the swash plate 50 is variable while sliding 64.

In addition, the outer circumferential surface of the swash plate 50 is fitted to the piston 14 so as to be able to slide through the shoe 76.

Accordingly, as the swash plate 50 rotates in an inclined state, the pistons 14 fitted through the shoe 76 on the outer circumferential surface thereof are reciprocated in each cylinder bore 12 of the cylinder block 10. do.

By the reciprocating motion of the piston 14, the refrigerant in the suction chamber 22 is sucked into the cylinder bore 12, compressed, and discharged to the discharge chamber 24. The pressure in the crank chamber 86 and the suction chamber ( 22, the inclination angle of the swash plate 50 is changed according to the pressure difference in the discharge amount of the refrigerant is controlled, which adjusts the pressure of the crank chamber 86 by opening and closing the valve by energization, through which the inclination angle of the swash plate 50 It is usually implemented by the capacity control valve 200 to adjust the discharge capacity by adjusting the.

In the rear housing 18, a suction chamber 22 and a discharge chamber 24 are formed, respectively, and a valve plate assembly 100 is interposed between the rear housing 18 and the cylinder block 10.

The above-mentioned compressor is just one example in which the valve plate assembly 100 according to the present invention is installed, and is applicable to all other various types of compressors.

Hereinafter, the valve plate assembly 100 according to the present invention will be described.

As shown in FIGS. 3 to 6, the valve plate assembly 100 according to the present invention includes a valve plate 110 having a suction port 111 and a suction lead 120 that opens and closes the suction port 110. It is composed of

First, the suction port 111 is in communication with the suction chamber 22, the suction refrigerant is introduced, the suction lead 120 is connected to the valve seat 122 by the neck 121.

At this time, the lead 120 and the neck 121 is elastically deformed by the suction pressure (Ps) of the suction refrigerant to open and close the suction port 111 to suck the suction refrigerant into the cylinder bore (12). do.

In addition, the suction port 111 is composed of an inlet side first suction port 112 and an outlet side second suction port 113, and the area of the second suction port 113 is the first suction port 112. It is preferable to form wider than the area of.

The valve plate 110 includes a first valve plate 110a facing the suction chamber 22 and a second valve plate 110b facing the cylinder bore 12. In this case, the first suction port 112 may be formed in the first valve plate 110a and the second suction port 113 may be formed in the second valve plate 110b.

However, the first suction port 112 and the second suction port 113 may be formed in one valve plate.

The first valve plate 110a closes a part of the inlet side of the second suction port 113 so that the first and

second suction ports

112 and 113 are formed to be stepped with each other. That is, the first and

second suction ports

112 and 113 communicated to suck the suction refrigerant have different areas as described above, so that the first and

second valve plates

110a and 110b overlap each other. The two

suction ports

112 and 113 are stepped together.

In the drawing, the first suction port 112 is formed in the form of a long hole in the circumferential direction of the valve plate, the second suction port 113 is wrapped around the first suction port 112, the circumferential circumferential direction It includes a protruding portion 114 that extends toward the circumference of the valve plate to allow a more natural stepped portion can be formed.

Two protruding portions 114 are formed via the groove-shaped portion 115, but one or three or more protrusions 114 may be installed.

Accordingly, since the area of the first and

second suction ports

112 and 113 is wide, the pressure drop of the suction refrigerant is minimized by preventing the passage speed of the suction refrigerant from increasing.

Specifically, the suction refrigerant may include a suction chamber 22, a first suction port 112 having a relatively smaller area than the suction chamber 22, and a first suction port 112 having a relatively larger area than the first suction port 112. As the speed decreases while passing through the second suction port 113, the pressure drop is suppressed.

In addition, as the suction port 111 of the present invention has a relatively larger area than the suction port of the related art shown in FIG. 1, the area where the suction refrigerant of the lid 120 acts increases. It is possible to suppress the occurrence of noise by reducing the lift.

In addition, since the valve lift of the lid 120 is not large, the restoration is easy, and the efficiency of the compressor can be suppressed.

In addition, as the valve lift of the lid 120 decreases, dead volume is also reduced, thereby improving cooling ability.

As mentioned above, although preferred embodiment of this invention was described in detail, the technical scope of this invention is not limited to the above-mentioned embodiment, It should be interpreted by the claim. At this time, those of ordinary skill in the art should consider that many modifications and variations are possible without departing from the scope of the present invention.

For example, in the above description, the pressure reduction of the suction refrigerant has been described using the suction side as an example, but the same may be applied to the discharge side.

Claims

A valve plate 110 on which a suction port 111 is formed; And

Consists of; suction lead 120 for opening and closing the suction port 111;

The suction port 111 is composed of an inlet side first suction port 112 and an outlet side second suction port 113, and the area of the second suction port 113 is the area of the first suction port 112. Valve plate assembly of the compressor, characterized in that it is formed more wide.
The method of claim 1,

The valve plate 110,

The valve plate assembly of the compressor, characterized in that consisting of the first valve plate (110a) is formed with the first suction port (112) and the second valve plate (110b) is formed with the second suction port (113).
The method of claim 2,

The valve plate assembly of the compressor, characterized in that the first valve plate (110a) closes a part of the inlet side of the second suction port (113) so that the first and second suction ports (112,113) are stepped.
The method according to any one of claims 1 to 3,

The first suction port 112 is formed in the shape of a long hole in the circumferential direction of the valve plate, the second suction port 113 is wrapped around the first suction port 112 but across the circumferential circumferential direction And a protrusion (114) extending toward the circumference of the valve plate.
The method of claim 4, wherein

Valve protrusion assembly of the compressor, characterized in that two protruding portion 114 is formed via the groove-shaped portion (115).