KR20040006869A - Compressor structure of air conditioner for reducing slugging noise - Google Patents

Abstract

PURPOSE: A structure of a compressor of an air conditioner for reducing noise is provided to reduce slugging noise by distributing liquid refrigerant formed in the compressor when the air conditioner is turned off evenly to a front side and a rear side. CONSTITUTION: At least one penetrating hole(44) is formed in a cylinder main body(40) in longitudinal direction to form a channel so that refrigerant introduced through a suction port is distributed to both sides and introduced to both ends of a cylinder(42). At least one transfer hole(48,48') is formed in the cylinder main body in longitudinal direction to form a channel so that refrigerant pressurized and discharged to both of the ends of the cylinder is collected to and outlet and discharged. At least one of the transfer holes is formed on a lower side of the cylinder main body, or the transfer holes are formed on an upper side and the lower side of the cylinder main body, respectively. Discharge pressure is distributed to both sides of the cylinder thereby to reduce slugging noise.

Description

Noise reduction air conditioning compressor structure {COMPRESSOR STRUCTURE OF AIR CONDITIONER FOR REDUCING SLUGGING NOISE}

The present invention relates to a noise reduction air conditioner compressor structure, and more particularly, to a structure of a compressor installed in a vehicle air conditioner, in particular, so that the liquid refrigerant formed in the compressor when the air conditioner is turned off is evenly distributed on the front side and the rear side, A noise reduction type air conditioner compressor which reduces slugging noise during compressor operation.

1 is a block diagram of a general vehicle air conditioner.

A typical automotive air conditioner system consists of four main components: an expansion valve (1), an evaporator (2), a compressor (3), and a condenser (4).

The expansion valve 1 is supplied with a liquid refrigerant of high temperature and high pressure, throttles, is made into a liquid refrigerant of low temperature and low pressure, and is sent to the evaporator 2. The evaporator 2 evaporates the refrigerant of low temperature and low pressure to cool the wind by its evaporation heat. It functions to generate

The compressor 3 is operated by an engine, and the low-temperature / low-pressure gaseous refrigerant discharged from the evaporator 2 is compressed into a high-temperature / high-pressure gaseous refrigerant to be sent to the condenser 4, and the condenser 4 is the compressor. It functions to cool and condense the refrigerant sent out in (3) to a liquid refrigerant of high temperature and high pressure again.

Unexplained reference numeral 5 denotes a receiver drier which removes moisture and foreign matter in the refrigerant and functions to store and supply the refrigerant.

2 is a cross-sectional configuration diagram of an air conditioner compressor used in the above air conditioner system, and shows an example of a general swash plate type compressor.

The illustrated swash plate type compressor has a basic configuration in which the cylinder body 40 is installed in the front head 100 and the rear head 200. A plurality of cylinders 42 are formed in the cylinder body 40 to form each cylinder ( 42) Inside the piston 30 is formed with pressing surfaces on both sides.

A portion of the circumference of the swash plate 20 is formed at the center of each piston 30 so that the piston 30 moves in the same direction as the drive shaft 10 when the swash plate 20 integrated with the drive shaft 10 rotates. It has a structure to reciprocate.

On both sides of the cylinder body 40, the flow path plate 50 and the valve plate 60 are sequentially installed, and the flow path plate 50 is formed with a pressure surface of each piston 30 and an inner surface of the cylinder 42. The suction hole 52 and the discharge hole 54 are respectively formed in the radially outer side and the inner side so as to suck or discharge the refrigerant into the pressure chamber.

In addition, the valve plate 60 is provided with a valve 62 for opening and closing the flow path only in one direction on the suction or discharge side at positions corresponding to the suction holes 52 and the discharge holes 54.

With this structure, when one side of each piston 30 is a compression stroke, the opposite side performs compression and suction to both sides at the same time by performing a suction stroke.

Reference numeral 210 denotes a discharge port. The refrigerant introduced into each cylinder 42 through the suction hole (not shown) and the suction hole 52 is pressurized by the piston 30 to discharge the discharge hole 52 and the discharge hole ( Through 210).

Reference numeral 12 denotes a drive shaft bearing, 22 a thrust bearing, 26 a swash plate bearing, 44 a swash plate buffer, and 48 a transfer hole.

3 is a perspective view showing an example of a conventional air conditioner compressor cylinder body.

As shown in the cylinder body 40, five cylinders 42 are formed, and the suction part 41 is formed on one side of the outer circumference.

In addition, a plurality of through holes 44 are supplied to the cylinder body 40 so that the refrigerant sucked is distributed to the front head 100 side and the rear head 200 side and flows into each cylinder 42 through the suction hole 52. ) Is formed, and a transfer hole 48 for forming a flow path so that the refrigerant pressurized and discharged from the cylinder 42 through the discharge hole 52 flows to the discharge port 210 side formed at one side thereof is formed through the upper one side. .

However, when the vehicle is kept in the parking state for a long time in such an air conditioning system, the refrigerant of the evaporator 2 and the condenser 4 moves to the compressor 3 due to the crossover, and the liquid refrigerant is formed in the compressor 3. When the air conditioner is driven in the state where the liquid refrigerant is formed, the slug noise is generated while the liquid refrigerant in the compressor 3 is compressed.

Such slugging noise is generated by a single occurrence and occurs only during initial air conditioner operation. However, when the amount of insolation increases or the daily crossover is large, the noise is generated largely, causing anxiety to the driver and mechanically reducing durability.

The present invention is to solve the above problems, as a structure of a compressor installed in a vehicle air conditioner, in particular, the liquid refrigerant formed in the compressor when the air conditioner off, evenly distributed on the front side and rear side, the slur at the time of compressor operation It is an object of the present invention to provide a noise reduction air conditioner compressor structure for reducing ging noise.

1 is a block diagram of a general vehicle air conditioner,

2 is a cross-sectional configuration diagram of a typical air conditioner compressor,

3 is a perspective view showing an example of a conventional air conditioner compressor cylinder body,

4 is a schematic diagram showing a state in which a liquid refrigerant is distributed in a conventional air conditioner compressor,

5 is a schematic diagram showing a state in which the liquid refrigerant is distributed in the air conditioner compressor according to the present invention,

6 is a perspective view showing an embodiment of an air conditioner compressor cylinder body according to the present invention;

7A and 7B are configuration diagrams of the front head and the rear head of the air conditioner compressor according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: drive shaft 20: swash plate

30: piston 40: cylinder body

42: cylinder 44: through hole

48,48 ': Transfer hole 100: Front head

200: rear head 210: discharge port

C: casing

In the present invention for achieving the above object, in the casing (C), each of which the inlet and outlet of the refrigerant 210 is formed, a cylinder body 40 having a plurality of cylinders 42 formed in the longitudinal direction is provided, Each cylinder 42 is provided with a piston 30 having pressure surfaces formed on both sides thereof, and a circumferential portion of the swash plate 20 integrally formed with the drive shaft 10 at an approximately central portion of each piston 30 is engaged with the drive shaft ( In the compressor formed to reciprocate the piston (30) by the rotation of 10, the cylinder body 40, the refrigerant flowing through the suction port is distributed to both sides to flow into both ends of the cylinder (42) At least one transfer hole 44 for forming a flow path is formed in the longitudinal direction, and at least one transfer for forming a flow path such that the refrigerant pressurized and discharged at both ends of the cylinder 42 is collected and discharged toward the discharge port 210 side. The hole is formed in the longitudinal direction, the transfer hole is characterized in that at least one is formed on the lower side of the cylinder body (40).

In addition, in the present invention, the transfer holes 48, 48 'is characterized in that formed one each on the upper side and the lower side of the cylinder body (40).

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

Since the compressor according to the present embodiment has a structure basically the same as that of the conventional air conditioner compressor shown in FIG. 2, redundant description of the entire configuration of the compressor is omitted in the following description, and the same components as those of the conventional components described above. The same reference numerals denote the same reference numerals.

4 is a schematic diagram showing a state in which the liquid refrigerant is distributed in the conventional air conditioner compressor, Figure 5 is a schematic diagram showing a state in which the liquid refrigerant is distributed in the air conditioner compressor according to the present invention.

In the above-described conventional compressor, a transfer hole 48 for forming a flow path so that the refrigerant pressurized and discharged from the cylinder 42 through the discharge hole 52 flows to the discharge port 210 formed on one side thereof is formed through the upper side. .

By the way, when the transfer hole 48 is formed only on one side of the upper portion, the liquid refrigerant R formed in the compressor due to one crossing or the like is excessively gathered on one side of the front or rear as shown in FIG. 4. When the air conditioner is initially started, excessive discharge pressure is applied to the cylinder 42 on the side where the liquid refrigerant R is collected, thereby greatly generating slugging noise.

Therefore, in the present invention, as shown in FIG. 5, the transfer hole 48 is further formed on the lower side so that the liquid refrigerant collected in the compressor is evenly distributed on both front and rear sides.

When the liquid refrigerant is distributed in this way, the discharge pressure, which is excessively applied to one side of the cylinder 42, is divided into both sides of the cylinder 42, and thus takes a small value, thereby reducing the generation of slugging noise to a considerable level.

FIG. 6 is a perspective view showing an embodiment of an air conditioner compressor cylinder body according to the present invention. As illustrated, an additional transfer hole 48 ′ is formed at a lower side of the cylinder body 40, and as shown in FIG. 5. As in the state, the liquid refrigerant formed when the air conditioner is turned off is distributed evenly on the front and rear sides.

On the other hand, the casing (C) of the compressor according to the present embodiment is composed of the front head 100 and the rear head 200, the front head 100 to form a flow path in close contact with both end surfaces of the cylinder body 40, respectively The inner surface of the rear head 200 is formed in the shape shown in FIGS. 7A and 7B in consideration of the added transfer hole 48 ′.

That is, the inner surface of the front head 100 and the rear head 200 which are in close contact with both ends of the cylinder body 40, the refrigerant to communicate with the suction hole 52 or the discharge hole 54 of each cylinder 42 The suction side and discharge side flow paths 92 and 94 are formed, respectively, and as shown, the suction side flow path 92 is formed outside and the discharge side flow path 94 is formed inside.

Transfer hole communication portions 94a in consideration of the positions of the lower and upper transfer holes 48 'and 48 are formed at lower and approximately upper points of the discharge side flow path 94 inside the transfer holes 48' and 48. Through the liquid refrigerant located on the discharge side of the front and rear can be communicated with each other.

In addition, the area of the discharge side flow path 94 formed therein is formed somewhat larger than the conventional one so that such a structure can be easily applied.

The present invention described above can be embodied in many different forms without departing from the spirit or main features thereof. Therefore, the above embodiments are merely examples in all respects and should not be interpreted limitedly.

The noise reduction type air conditioner compressor structure of the present invention allows the liquid refrigerant formed in the compressor to be evenly distributed on the front side and the rear side when the air conditioner is turned off, thereby reducing the discharge pressure generated in the liquid refrigerant during the operation of the compressor to reduce slugging noise. It provides the effect of extending the life of the device by reducing the pressure and improving the durability of the compressor.

Claims (2)

In the casing (C) where the inlet and outlet of the refrigerant 210 are formed, respectively, a cylinder body 40 having a plurality of cylinders 42 formed in the longitudinal direction is installed, and each cylinder 42 has pressurization surfaces on both sides thereof. The formed piston 30 is installed, and a portion of the circumference of the swash plate 20 integrally formed with the drive shaft 10 at the center of each of the pistons 30 is engaged to reciprocate the piston 30 by rotation of the drive shaft 10. In a compressor configured to exercise, The cylinder body 40, at least one through-hole 44 is formed in the longitudinal direction to form a flow path so that the refrigerant flowing through the suction port is distributed to both sides and flows into both ends of the cylinder 42, the cylinder At least one transfer hole forming a flow path is formed in the longitudinal direction such that the refrigerant pressurized and discharged at both ends of the 42 is discharged to the discharge port 210 side, and at least one transfer hole is formed in the cylinder body 40. Noise reduction air conditioning compressor structure, characterized in that formed on the lower side. The method of claim 1, Noise reduction type air conditioner compressor structure, characterized in that the transfer holes (48, 48 ') are formed one each on the upper side and the lower side of the cylinder body (40).