KR20230095524A - Condenser for car airconditioner - Google Patents

Abstract

The present invention relates to a compressor for an automobile air conditioner, which includes a housing installed in an engine room of a vehicle, a cylinder block coupled to the housing, a drive shaft rotatably installed inside the housing, and an inclination angle caused by a rotational movement inside the housing. A swash plate installed so that the swash plate is variable, a lug plate coupled to the drive shaft so that power is transmitted to the swash plate, a first spring provided between the lug plate and the swash plate, and a second spring provided between the cylinder block and the swash plate. and a piston reciprocating by sliding with the swash plate, comprising: a first coupling part coupled to a front end of the first spring; a first fixing part formed at a position facing the first coupling part among the rear surfaces of the lug plate to fix the first coupling part; a second coupling part coupled to the rear end of the second spring; and a second fixing part formed at a position facing the second coupling part among the front surfaces of the cylinder block to fix the second coupling part. With this configuration, by fixing the first spring and the second spring coupled to the drive shaft to the drive shaft so that they can rotate integrally when the drive shaft rotates, the first spring and the second spring as well as the first spring and the second spring by the rotational force and inertia of the drive shaft. It is possible to obtain an effect capable of preventing wear of the lug plate and the cylinder block in contact with the spring and the second spring.

Description

Compressor for automobile air conditioner {CONDENSER FOR CAR AIRCONDITIONER}

The present invention relates to a compressor for an automobile air conditioner, and more particularly, to a compressor for an automobile air conditioner for receiving refrigerant from an evaporator of the automobile air conditioner, converting a high-temperature, high-pressure refrigerant gas, and supplying it to a condenser.

In a general swash plate type compressor, which is widely used as a compressor for automobile air conditioners, a disk-shaped swash plate with a certain inclination angle is fixedly installed on a drive shaft that receives engine power, rotates by the drive shaft, and the swash plate is rotated by the rotation of the swash plate. A plurality of pistons installed along the circumference through a shoe are configured to suck, compress, and discharge refrigerant gas by linearly reciprocating inside a plurality of cylinder bores formed in a cylinder block.

In particular, in recent years, the inclination angle of the swash plate is changed according to the change in heat load, thereby achieving precise temperature control by controlling the transfer amount of the piston, and at the same time, the inclination angle is continuously changed to reduce the sudden torque fluctuation of the engine by the compressor, thereby reducing the ride comfort of the vehicle A capacity variable swash plate type compressor capable of improving the performance has been proposed.

Hereinafter, a capacity variable swash plate type compressor according to the prior art will be described.

The capacity variable swash plate compressor of the prior art has a plurality of cylinder bores formed in parallel along the longitudinal direction on the inner circumferential surface and a cylinder block constituting the outside of the compressor, and disposed at the front end of the cylinder block to form a swash plate chamber A front housing, a drive shaft rotatably supported by the cylinder block and the front housing, a lug plate fixed to the drive shaft in a swash plate chamber of the front housing, and a suction chamber and a discharge chamber formed therein, and the cylinder block A rear housing disposed at the rear end of, a swash plate whose inclination angle can be changed while being rotated by the lug plate and formed in a circular plate shape, a gas spring supported between the lug plate and the front surface of the swash plate, and the rear surface of the swash plate It is configured to include a return spring supported by a return spring, and a piston that is slidably coupled to the swash plate through a shoe and accommodated for reciprocating movement in a cylinder bore.

On the other hand, on the valve plate installed between the rear housing and the cylinder block, a suction port communicating the cylinder bore and the suction chamber and a discharge port communicating the cylinder bore and the discharge chamber are formed.

In addition, a suction valve and a discharge valve for opening and closing the inlet and outlet by a pressure change according to the reciprocating motion of the piston are provided at the inlet and outlet, respectively.

In addition, a return spring for arranging the swash plate in the center through the gaseous spring and each elasticity is mounted on the drive shaft in the direction toward which the rear surface of the swash plate faces.

Both ends of the gaseous spring and the return spring as described above are coupled to the outer circumferential surface of the drive shaft in a coil form so that both ends can be brought into close contact with the lug plate and the cylinder block and the commercial plate, respectively, by elasticity.

However, these gas springs and return springs are rotated by the rotational force and inertia of the drive shaft, but are rotated separately from the drive shaft, and friction is generated because they are in close contact with both ends and lug plates and swash plates, cylinder blocks and commercially available products in close contact with both ends, There is a problem in that the elasticity of the gaseous spring and the return spring is reduced and damaged due to wear, as well as the wear of the adjacent cylinder block, lug plate and swash plate, resulting in reduced precision and damage.

Korean Intellectual Property Office Publication No. 20-2000-0012675 Korea Intellectual Property Office Registration No. 10-0661360 Korean Intellectual Property Office Publication No. 20-1999-0032868 Korea Intellectual Property Office Registration No. 10-0119122

The present invention was invented to solve the above problems, and the purpose of the present invention is to prevent wear caused by friction with adjacent cylinder blocks, lug plates and swash plates while the gas springs and return springs are rotated by the rotational force and inertia of the drive shaft. there is.

In order to achieve the above object, a compressor for an automobile air conditioner according to a preferred embodiment of the present invention includes a housing installed in an engine room of a vehicle, a cylinder block coupled to the housing, and a drive shaft rotatably installed inside the housing. And, a swash plate installed inside the housing so that the inclination angle is variable by rotational motion, a lug plate coupled to the drive shaft so that power is transmitted to the swash plate, a first spring provided between the lug plate and the swash plate, In a compressor for an automobile air conditioner comprising a second spring provided between a cylinder block and a swash plate, and a piston reciprocating by sliding with the swash plate, a first coupling part coupled to the front end of the first spring ; a first fixing part formed at a position facing the first coupling part among the rear surfaces of the lug plate to fix the first coupling part; a second coupling part coupled to the rear end of the second spring; and a second fixing part formed at a position facing the second coupling part among the front surfaces of the cylinder block to fix the second coupling part.

In addition, a first coupling ring and a second coupling ring having a ring shape are provided on the first coupling portion and the second coupling portion, and the first coupling ring and the second coupling ring are provided on the first fixing portion and the second fixing portion. It is characterized in that a first circumferential groove and a second circumferential groove are formed so that the ring is coupled.

In addition, first coupling protrusions and second coupling protrusions are formed on the outer circumferential surfaces of each of the first coupling ring and the second coupling ring at regular intervals, and the first coupling protrusions and the second coupling protrusions are formed on the outer circumferential surfaces of each of the first circumferential groove and the second circumferential groove. It is characterized in that the first coupling groove and the second coupling groove are formed to correspond to the protrusion and the second coupling protrusion.

In addition, a first elastic body and a second elastic body having elasticity lower than those of the first spring and the second spring are coupled to the first coupling groove and the second coupling groove at positions facing the first coupling protrusion and the second coupling protrusion, respectively. And, the first elastic body and the second elastic body are contracted by the elasticity of the first spring and the second spring when the first coupling protrusion and the second coupling protrusion are coupled to the first coupling groove and the second coupling groove, When elastic release of the first spring and the second spring, the first engaging protrusion and the second engaging protrusion are pushed, respectively.

In addition, a first inlet groove and a second inlet groove are formed at positions facing the first elastic body and the second elastic body in the first coupling protrusion and the second coupling projection, and the first inlet groove and the second inlet groove have It is characterized in that the first elastic body and the second elastic body are retracted when in close contact with the first coupling groove and the second coupling groove.

According to the compressor for an automobile air conditioner according to the present invention, the first spring and the second spring coupled to the drive shaft are fixed to the drive shaft so that they can be integrally rotated when the drive shaft rotates. An effect capable of preventing wear of the lug plate and the cylinder block in contact with the first spring and the second spring as well as the second spring can be obtained.

1 is a diagram showing a compressor for an automobile air conditioner according to a preferred embodiment of the present invention.
2 is a bottom view of a first coupling unit according to a preferred embodiment of the present invention.
3 is a plan view of a first fixing unit according to a preferred embodiment of the present invention.
4 to 5 are operation diagrams of the first coupler according to a preferred embodiment of the present invention.
6 is a bottom view of a second coupling unit according to a preferred embodiment of the present invention.
7 is a plan view of a second fixing unit according to a preferred embodiment of the present invention.
8 to 9 are operation diagrams of the second coupler according to a preferred embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Hereinafter, the present invention will be described with reference to drawings for explaining a compressor for an automobile air conditioner according to embodiments of the present invention.

1 is a view showing a compressor for an automobile air conditioner according to a preferred embodiment of the present invention, FIG. 2 is a bottom view of a first coupling part according to a preferred embodiment of the present invention, and FIG. 3 is a first view according to a preferred embodiment of the present invention. A plan view of the fixing unit, FIGS. 4 to 5 are operation diagrams of the first coupling unit according to a preferred embodiment of the present invention, FIG. 6 is a bottom view of the second coupling unit according to a preferred embodiment of the present invention, and FIG. A plan view of the second fixing unit according to a preferred embodiment, and FIGS. 8 and 9 are operational views of the second coupling unit according to a preferred embodiment of the present invention.

Referring to these drawings, the compressor for an automobile air conditioner according to the present embodiment has a feature of preventing wear due to friction as the spring coupled to the driving shaft is rotated integrally by the rotational force and inertia of the driving shaft.

The compressor 100 for an automobile air conditioner according to the present embodiment capable of providing such an effect includes a housing 20 installed in a vehicle engine room, a cylinder block 10 coupled to the housing 20, and the housing (20) A drive shaft 30 installed to be rotatable inside, a swash plate 40 installed so that an inclination angle is varied by rotation inside the housing 20, and power transmitted to the swash plate 40 A lug plate 50 coupled to the drive shaft 30, a first spring 60 provided between the lug plate 50 and the swash plate 40, and between the cylinder block 10 and the swash plate 40 In the compressor for an automobile air conditioner comprising a second spring 70 provided and a piston 80 that reciprocates by sliding with the swash plate 40, the first coupling part 110, the first high It includes a government 120, a second coupling part 130 and a second fixing part 140.

The driving shaft 30 is driven by receiving power from the engine of a vehicle, which is an external power source, through a belt and a pulley.

The first coupling part 110 is for fixing the first spring 60 to the lug plate 50, and a first coupling ring 111 integrally coupled to the front of the first spring 60 includes

The first coupling ring 111 has a ring shape and is coupled to the front of the first spring 60 so as to be inserted into the drive shaft 30 together with the first spring 60 .

First coupling protrusions 112 protrude from the outer circumferential surface of the first coupling ring 111 at regular intervals.

A first inlet groove 113 is formed at each front of the first coupling protrusion 112 .

The first fixing part 120 has a first circumferential groove 121 formed at a position facing the first coupling ring 111 so that the first coupling portion 110 can be coupled thereto.

A first coupling groove 122 is formed on an outer circumferential surface of the first circumferential groove 121 to correspond to the first coupling protrusion 112 .

At this time, the first coupling protrusion 112 is airtightly coupled to the first coupling groove 122 .

The first coupling protrusion 112 is coupled to the first coupling groove 122 so that the first spring 60 integrally rotates when the first driving shaft 30 rotates.

In addition, a first elastic body 123 is coupled to each of the first coupling grooves 122 at a position facing the first inlet groove 113 of the first coupling protrusion 112 .

The first elastic body 123 has a smaller elastic force than the first spring 60 .

Here, the first elastic body 123 is inserted into the first inlet groove 113 when the first coupling protrusion 112 is coupled to the first coupling groove 122 .

At this time, the first elastic body 123 pushes the first coupling protrusion 112 through elasticity, but is disposed in a contracted state by the elastic force of the first spring 60 .

Accordingly, the first elastic body 123 is maintained in a contracted state by the elastic force of the first spring 60, and then the elastic force of the first spring 60 to separate the first coupling ring 111. When released, the first coupling ring 111 is pushed outward.

The second coupling part 130 is for fixing the second spring 70 to the cylinder block 10, and a second coupling ring 131 integrally coupled to the rear of the second spring 70 includes

The second coupling ring 131 has a ring shape and is coupled to the rear of the second spring 70 so as to be inserted into the driving shaft 30 together with the second spring 70 .

Second coupling protrusions 132 protrude from the outer circumferential surface of the second coupling ring 131 at regular intervals.

A second inlet groove 133 is formed at each front of the second coupling protrusion 132 .

The second fixing part 140 has a second circumferential groove 141 formed at a position facing the second coupling ring 131 so that the second coupling portion 130 can be coupled thereto.

A second coupling groove 142 is formed on an outer circumferential surface of the second circumferential groove 141 to correspond to the second coupling protrusion 132 .

At this time, the second coupling protrusion 132 is airtightly coupled to the second coupling groove 142 .

The second coupling protrusion 132 is coupled to the second coupling groove 142 so that the second spring 70 integrally rotates when the second driving shaft 30 rotates.

In addition, the second elastic body 143 is coupled to each of the second coupling grooves 142 at a position facing the second inlet groove 133 of the second coupling protrusion 132 .

The second elastic body 143 has a smaller elastic force than the second spring 70 .

Here, the second elastic body 143 is inserted into the second inlet groove 133 when the second coupling protrusion 132 is coupled to the second coupling groove 142 .

At this time, the second elastic body 143 pushes the second coupling protrusion 132 through elasticity, but is disposed in a contracted state by the elastic force of the second spring 70 .

Accordingly, the second elastic body 143 is maintained in a contracted state by the elastic force of the second spring 70 and then the elastic force of the second spring 70 to separate the second coupling ring 131. When released, the second coupling ring 131 is pushed outward.

According to the compressor for an automobile air conditioner according to the present invention, the first spring and the second spring coupled to the drive shaft are fixed to the drive shaft so that they can be integrally rotated when the drive shaft rotates. An effect capable of preventing wear of the lug plate and the cylinder block in contact with the first spring and the second spring as well as the second spring can be obtained.

Those skilled in the art to which the present invention pertains will understand that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The scope of the present invention is indicated by the claims to be described later rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention. should be interpreted

100: compressor 10: cylinder block
11: cylinder bore 20: housing
30: drive shaft 40: swash plate
50: lug plate 60: first spring
70: second spring 80: piston
110: first coupling part 111: first coupling ring
112: first coupling protrusion 113: first inlet groove
120: first fixing part 121: first circumferential groove
122: first coupling groove 123: first elastic body
130: second coupling part 131: second coupling ring
132: second coupling protrusion 133: second inlet groove
140: second fixing part 141: second circumferential groove
142: second coupling groove 143: second elastic body

Claims (5)

A housing installed in the engine room of a vehicle, a cylinder block coupled within the housing, a drive shaft rotatably installed inside the housing, a swash plate installed inside the housing so that the inclination angle is variable by rotational motion, and the swash plate A lug plate coupled to the drive shaft to transmit power, a first spring provided between the lug plate and the swash plate, a second spring provided between the cylinder block and the swash plate, and reciprocating movement by sliding with the swash plate In the compressor for an automobile air conditioner comprising a piston to do,
a first coupling part coupled to the front end of the first spring;
a first fixing part formed at a position facing the first coupling part among the rear surfaces of the lug plate to fix the first coupling part;
a second coupling part coupled to the rear end of the second spring; and
A compressor for an automobile air conditioner, characterized in that it comprises a; second fixing portion formed at a position facing the second coupling portion on the front surface of the cylinder block to fix the second coupling portion.
According to claim 1,
The first coupling portion and the second coupling portion are provided with a first coupling ring and a second coupling ring having a ring shape,
A compressor for an automobile air conditioner, characterized in that a first circumferential groove and a second circumferential groove are formed in the first fixing part and the second fixing part so that the first coupling ring and the second coupling ring are coupled.
According to claim 2,
First coupling protrusions and second coupling protrusions are formed at regular intervals on the outer circumferential surfaces of the first coupling ring and the second coupling ring,
A compressor for an automobile air conditioner, characterized in that a first coupling groove and a second coupling groove are formed on outer circumferential surfaces of each of the first circumferential groove and the second circumferential groove to correspond to the first coupling projection and the second coupling projection.
According to claim 3,
A first elastic body and a second elastic body having elasticity lower than those of the first spring and the second spring are coupled to the first coupling groove and the second coupling groove at positions facing the first coupling projection and the second coupling projection, respectively;
The first elastic body and the second elastic body are contracted by the elasticity of the first spring and the second spring when the first coupling protrusion and the second coupling protrusion are coupled to the first coupling groove and the second coupling groove. A compressor for an automobile air conditioner, characterized in that, when the first spring and the second spring are elastically released, the first engaging protrusion and the second engaging protrusion are pushed, respectively.
According to claim 4,
A first inlet groove and a second inlet groove are formed in the first engaging protrusion and the second engaging protrusion at positions facing the first elastic body and the second elastic body,
The compressor for a vehicle air conditioner, characterized in that the first elastic body and the second elastic body are drawn into the first inlet groove and the second inlet groove when they come into close contact with the first coupling groove and the second coupling groove.

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