KR100993771B1 - Valve assembly of variable displacement compressor - Google Patents

Abstract

The valve assembly of the variable displacement compressor according to the present invention includes a valve housing formed so that the discharge chamber connecting hole and the crankcase connecting hole communicate with each other, and a capacity control valve body reciprocating by a solenoid to open and close the discharge chamber connecting hole. And a discharge check valve which is opened and closed in response to the reciprocating motion of the displacement control valve element, and an interlocking means for connecting the displacement control valve element and the discharge check valve. The present invention provides an effect that can be adjusted by the interlocking means of the opening and closing of the discharge check valve in conjunction with the opening and closing of the solenoid capacity control valve.

Compressor, Capacity Control Valve, Discharge Check Valve, Interlocking

Description

VALVE ASSEMBLY OF VARIABLE DISPLACEMENT COMPRESSOR}

The present invention relates to a valve assembly of a variable displacement compressor, and more particularly to a valve assembly of a variable displacement compressor configured to adjust the opening and closing of the discharge check valve in conjunction with the opening and closing of the solenoid capacity control valve.

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 rotary 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 discharged into the discharge chamber. The inclination angle of the swash plate is changed according to the pressure difference in the crank chamber and the pressure in the suction chamber, and the discharge amount of the refrigerant is Will be controlled.

In particular, by adopting an electromagnetic solenoid type capacity control valve to open and close the valve by energization to adjust the pressure of the crank chamber, through this to adjust the inclination angle of the swash plate to adjust the discharge capacity.

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 discharge check valve is provided in the discharge port communicating with the discharge chamber to prevent the backflow of the refrigerant during the minimum capacity operation of the compressor.

However, according to the conventional swash plate type compressor, a structure in which the discharge check valve is opened and closed in conjunction with opening and closing of the capacity control valve is not disclosed.

In addition, the conventional discharge check valve is configured to open and close at a desired time point by an external signal, which has a disadvantage in that the cost is increased by the addition of parts and the manufacturing process is complicated.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to provide a valve assembly of a variable displacement compressor configured to adjust the opening and closing of the discharge check valve in conjunction with the opening and closing of the solenoid capacity control valve. To provide.

In addition, another object of the present invention is to provide a valve assembly of a variable displacement compressor capable of obtaining a fast reaction speed by adjusting the opening amount of the discharge check valve in inverse proportion to the opening amount of the displacement control valve.

The valve assembly of the variable displacement compressor of the present invention for achieving the above object, the valve housing is formed so that the discharge chamber connecting hole and the crank chamber connecting hole communicate with each other, and reciprocating by the solenoid to open and close the discharge chamber connecting hole A capacity control valve comprising a capacity control valve body, a discharge check valve that is opened and closed in conjunction with the reciprocating motion of the capacity control valve body, and interlocking means for connecting the capacity control valve body and the discharge check valve.

Here, it is preferable that the displacement control valve and the discharge check valve are aligned in the moving direction of the displacement control valve body.

The discharge check valve may include a main body formed with an inlet flow path and an outlet flow path, a check valve body freely installed in the main body to open and close the flow path, and a spring disposed between the main body and the check valve body. It is preferable.

The interlocking means may include an actuating member for connecting the dose control valve body and the check valve body, and the actuating member may be installed to penetrate the discharge chamber connecting hole.

In addition, the inlet flow passage and the outlet flow passage are preferably formed before and after the moving direction of the check valve body.

In addition, the discharge check valve is preferably located on the side of the capacity control valve.

In addition, the discharge check valve is composed of a main body formed with an inlet flow path and an outlet flow path, a check valve body for freely opening and closing the flow path by being provided with a shanghai copper on the main body, and a spring disposed between the main body and the check valve body. It is preferable.

On the other hand, the interlocking means, one end is hinged to the displacement control valve body and the other end is a link hinged to the check valve body, the support and formed in the valve housing to rotatably support the link and the main body It is preferably composed of a moving hole is formed so that the link is moved.

In addition, the inlet flow path is preferably formed in the moving direction of the check valve body, the outlet flow path is preferably formed in a direction crossing the moving direction of the check valve body is in communication with the inlet flow path.

In addition, the inlet flow passage is formed in the vertical direction of the body length, the outlet flow passage is preferably formed in a direction opposite to the inlet oil of the main body is in communication with the inlet flow passage.

According to the valve assembly of the variable displacement compressor according to the present invention, in conjunction with the opening and closing of the solenoid capacity control valve provides an effect that can be controlled by the interlocking means of the discharge check valve.

In addition, by adjusting the opening amount of the discharge check valve inversely proportional to the opening amount of the capacity control valve, it provides an effect that can obtain a fast reaction speed.

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

First, the structure of the variable displacement swash plate compressor provided with a valve assembly according to the present invention will be described schematically.

1 is a longitudinal sectional view showing a structure of a variable displacement compressor according to the present invention, Figure 2 is a longitudinal sectional view showing the structure of a valve assembly according to a first embodiment of the present invention, Figure 3 is a valve is opened in Figure 2 It is a longitudinal cross-sectional view which shows a state.

As shown, the variable displacement swash plate type compressor C includes a cylinder block 10 having a plurality of cylinder bores 12 formed in parallel in a longitudinal direction on an inner circumferential surface thereof, and in front of the cylinder block 10. The front housing 16 is hermetically coupled, and the rear housing 18 hermetically coupled via a valve plate 20 at 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 the center thereof are formed to protrude integrally on one surface, and one surface of the swash plate 50 has a ball. As the lug plate 54 rotates, the ball 66 of the swash plate 50 slides in the guide hole 64 of the lug plate 54 so that the swash plate 50 can be rotated. The inclination angle is variable.

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.

In addition, a suction chamber 22 and a discharge chamber 24 are formed in the rear housing 18, and each cylinder bore is provided in the valve plate 20 interposed between the rear housing 18 and the cylinder block 10. The intake valve 32 and the discharge valve 36 are formed in the place corresponding to (12), respectively.

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 in accordance with 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 implemented by the valve assembly 100 having a capacity control valve 110 to adjust the discharge capacity.

In addition, the valve assembly 100 includes a discharge check valve 120 installed in the rear housing 18 to communicate with the discharge chamber 24.

First embodiment

Hereinafter, a valve assembly according to a first embodiment will be described with reference to the drawings.

As shown, the valve assembly 100 according to the first embodiment of the present invention, the discharge control valve 110, the discharge check valve 120 and the capacity to be opened and closed in conjunction with the capacity control valve 110 Consisting means 130 for connecting the control valve 110 and the discharge check valve 120.

The capacity control valve 110 includes a valve housing 111, a capacity control valve body 112, and an electromagnetic solenoid. As the electromagnetic solenoid is energized, the capacity control valve body 112 reciprocates to move the valve housing 111. ) Is configured to open and close the discharge chamber connecting hole 111a.

Here, the valve housing 111 has a suction chamber connecting hole 111c, a crank chamber connecting hole 111b, and a discharge chamber, which receive pressure from the suction chamber 22, the crank chamber 86, and the discharge chamber 24 of the compressor. The connection hole 111a is formed, respectively. The discharge chamber connecting hole 111a and the crank chamber connecting hole 111b are in communication with each other.

In addition, the displacement control valve body 112 is reciprocated by the energization of the electromagnetic solenoid, and opens and closes the discharge chamber connecting hole 111a through the crank chamber connecting hole 111b while reciprocating. A spring 112a is provided at the lower portion of the displacement control valve body 112, so that the displacement control valve body 112 is lowered normally in the absence of external force to maintain the discharge chamber connecting hole 111b in an open state.

The electromagnetic solenoid is configured to include a movable rod 113 connected to the displacement control valve body 112 and an electromagnetic coil 114 disposed around the movable rod 113. The movable iron core 115 is provided at the end of the movable rod 113.

On the other hand, the discharge check valve 120 is the main body 121, the inlet flow passage 123 and the outlet flow passage 124 is formed, and the shandong is freely installed in the main body 121 to check the opening and closing of the flow path (123, 124) It consists of the valve body 122 and the spring 125 arrange | positioned between the said main body 121 and the check valve body 122. As shown in FIG.

Here, the inlet passage 123 and the outlet passage 124 is formed to communicate in the longitudinal direction of the main body 121.

On the other hand, the capacity control valve 110 and the discharge check valve 120 is installed in a line aligned.

In addition, it is possible to control the opening and closing of the discharge check valve 120 in conjunction with the opening and closing of the capacity control valve 110 by the interlocking means (130).

The interlocking means 130 is composed of an operation member 131 connecting the capacity control valve body 112 of the capacity control valve 110 and the check valve body 122 of the discharge check valve 120. The operating member 131 is installed to penetrate through the discharge chamber connecting hole 111a.

Therefore, when power is not applied to the electromagnetic solenoid of the displacement control valve 110, the discharge control valve 120 does not rise as the displacement control valve body 112 of the displacement control valve 110 does not rise as shown in FIG. 2. The check valve body 122 also does not rise and the flow paths 123 and 124 remain closed.

On the other hand, when power is applied to the solenoid of the capacity control valve 110, the capacity control valve body 112 of the capacity control valve 110 is raised as shown in Figure 3, the capacity control valve body 112 The check valve body 122 of the discharge check valve 120 is raised by the rising of the operating member 131 connected to the openings so that the flow paths 123 and 124 communicate with each other.

As a result, when the discharge chamber connecting hole 111a and the crank chamber connecting hole 111b of the capacity control valve 110 are closed to increase the discharge amount of the compressor, the discharge check valve 120 is opened to discharge the refrigerant. When the discharge chamber connecting hole 111a and the crank chamber connecting hole 111b of the capacity control valve 110 are opened to reduce the discharge amount or the compressor is stopped, the discharge check valve 120 is closed to stop the discharge of the refrigerant.

That is, the opening amount of the discharge check valve 120 is adjusted in inverse proportion to the opening amount of the capacity control valve 110 to obtain a fast reaction speed.

Hereinafter, in describing another embodiment of the valve assembly according to the present invention, a configuration having the same configuration and function as the first embodiment of the present invention uses the same reference numeral, and a detailed description thereof will be omitted.

Second embodiment

4 is a longitudinal cross-sectional view showing the structure of a valve assembly according to a second embodiment of the present invention, Figure 5 is a longitudinal cross-sectional view showing an open state of the valve in FIG.

As shown, the valve assembly 100 ′ according to the second embodiment includes a displacement control valve 110, a discharge check valve 120 that is opened and closed in conjunction with the displacement control valve 110, and the displacement control valve. Consisting means 130 for connecting the 110 and the discharge check valve 120.

First, the discharge check valve 120 is located on the side of the capacity control valve 110, the inlet flow passage 123 of the discharge check valve 120 is formed in the longitudinal direction of the main body 121, the discharge check The outlet passage 124 of the valve 120 is formed in the vertical direction of the length of the body 121 and communicate with each other.

Here, the inlet flow passage 123 and the outlet flow passage 124 are opened and closed by the shanghaidong of the check valve body 122, the check valve body 122 is the capacity control valve body 112 of the capacity control valve 110. ) And by the interlocking means (130).

The linkage means 130 has one end hingedly connected to the capacity control valve body 112 of the capacity control valve 110 and the other end is hingedly connected to the check valve body 122 of the discharge check valve 120. 131, a support 132 formed in the valve housing 110, and a main body 121 of the discharge check valve 120 to rotatably support the link 131. Is composed of a moving hole 133 is formed so as to move.

Here, the support 132 is the center of rotation of the link 131.

Accordingly, when power is not applied to the solenoid of the displacement control valve 110, the discharge control valve 120 does not rise as shown in FIG. 4, so that the displacement control valve body 112 of the displacement control valve 110 does not rise. ) Check valve body 122 is also not lowered and the flow path (123, 124) is closed.

On the other hand, when power is applied to the electromagnetic solenoid of the capacity control valve 110, the capacity control valve body 112 of the capacity control valve 110 is raised as shown in Figure 5, the capacity control valve body 112 The check valve body 122 of the discharge check valve 120 is lowered by the link 131 connected to the opening 131, so that the flow paths 123 and 124 are opened.

In particular, according to the present embodiment, the amount of movement of the check valve body 122 can be increased even by the minute movement of the capacity control valve body 112 by the leverage effect.

Third embodiment

6 is a longitudinal sectional view showing the structure of the valve assembly according to the third embodiment of the present invention, Figure 7 is a longitudinal sectional view showing a state in which the valve is open in FIG.

As shown, the valve assembly 300 "according to the third embodiment of the present invention is the same as the second embodiment except for the configuration of all except the discharge check valve 120, a detailed description thereof will be omitted.

Here, the inlet flow passage 123 of the discharge check valve 120 is formed in the vertical direction of the length of the main body 121, the outlet flow path 124 of the discharge check valve 120 is the inlet flow path of the main body 121 ( 123 are formed in a direction opposite to each other and communicate with each other.

That is, the inlet and outlet passages 123 and 124 are formed to penetrate in the vertical direction of the length of the body 121 to be opened and closed by the vertical movement of the check valve body 122.

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.

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

2 is a longitudinal sectional view showing a structure of a valve assembly according to a first embodiment of the present invention.

3 is a longitudinal sectional view showing a state in which the valve is open in FIG.

4 is a longitudinal sectional view showing a structure of a valve assembly according to a second embodiment of the present invention.

FIG. 5 is a longitudinal cross-sectional view illustrating a state in which the valve is opened in FIG. 4. FIG.

6 is a longitudinal sectional view showing a structure of a valve assembly according to a third embodiment of the present invention.

7 is a longitudinal cross-sectional view illustrating a state in which the valve is opened in FIG. 6.

* Description of symbols on main parts of the drawings *

100-valve assembly

110-capacity control valve

111-valve housing

112-displacement control valve body

113-movable rod

114-electromagnetic coil

115-Movable Iron Core

120-Discharge Check Valve

121-main unit

122-check valve body

130-Interlocking means

Claims (11)

A capacity control valve comprising a valve housing formed so that the discharge chamber connecting hole and the crank chamber connecting hole communicate with each other, and a capacity control valve body reciprocating by a solenoid to open and close the discharge chamber connecting hole; A discharge check valve positioned on a side of the capacity control valve and having a check valve body that is opened and closed in response to a reciprocating motion of the capacity control valve body; And Interlocking means for connecting the displacement control valve element and the discharge check valve; The linkage means is hingedly connected to the displacement control valve body, the valve assembly of the variable displacement compressor, characterized in that the link structure is hinged to the check valve body. delete delete delete delete delete The method of claim 1, The discharge check valve, A main body formed with an inlet passage and an outlet passage, A check valve body for opening and closing the flow path is freely installed in the main body and the shandong A valve assembly of a variable displacement compressor comprising a spring disposed between the main body and the check valve body. The method of claim 7, wherein The interlocking means, A support portion formed in the valve housing to rotatably support the link; The valve assembly of the variable displacement compressor, characterized in that consisting of a moving hole formed in the main body is formed so that the link. The method of claim 8, The inlet flow passage is formed in the movement direction of the check valve body, The outlet flow passage is a valve assembly of a variable displacement compressor characterized in that it is formed in a direction crossing the moving direction of the check valve body and in communication with the inlet flow passage. The method of claim 8, The inlet flow passage is formed in the vertical direction of the body length, The outlet flow passage is formed in a direction opposite to the inlet flow of the main body, the valve assembly of the variable displacement compressor, characterized in that the inlet flow passage. The method of claim 1, The capacity control valve body and the check valve body is a valve assembly of a variable displacement compressor, characterized in that the opening and closing operations are opposite to each other.

Images