US20070020118A1 - Electromotive swash plate type compressor - Google Patents
Electromotive swash plate type compressor Download PDFInfo
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- US20070020118A1 US20070020118A1 US10/554,000 US55400005A US2007020118A1 US 20070020118 A1 US20070020118 A1 US 20070020118A1 US 55400005 A US55400005 A US 55400005A US 2007020118 A1 US2007020118 A1 US 2007020118A1
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- chamber
- swash plate
- discharge
- refrigerant
- compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1081—Casings, housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1045—Cylinders
Definitions
- the present invention relates to a compressor with an electromotive swash plate, and more particularly, to a multi-stage compressor with an electromotive swash plate.
- an air conditioner for a vehicle compresses a refrigerant in a compressor, condenses the compressed refrigerant in a condenser, and transmits the condensed refrigerant to an expansion valve. Then, the expansion valve converts the condensed refrigerant into wet vapor with low temperature and low pressure and transmits the wet vapor to an evaporator. The wet vapor transmitted to the evaporator is heat-exchanged with external air to absorb heat of the external air and is then returned to the compressor for recirculation.
- the compressor used for compressing the refrigerant functions to (a) intake a heat-exchange medium evaporated in the evaporator, (b) compress the heat-exchange medium, and (c) pump out the heat-exchange medium for the continuous circulation of the heat-exchange medium.
- a compressor is classified, according to a driving manner, into a swash plate type, a scroll type, a rotary type, and a wobble plate type.
- the swash plate type compressor comprises a cylinder block having a plurality of bores in which respective pistons reciprocate.
- the cylinder block is fixed by front and rear housings.
- a driving shaft is installed in a central portion of the cylinder block.
- a swash plate is inserted in the cylinder block and coupled to the driving shaft. As the swash plate rotates, the pistons successively reciprocate in a longitudinal direction of the cylinder block.
- the swash plate type compressor is classified into a single-head type, where the compression is realized in a sided portion, and a double-head type, where the compression is realized in opposite sides. The latter comprises low and high-pressure chambers formed in the rear housing.
- the low-pressure chamber is provided to allow the refrigerant to be introduced into the cylinder via a valve assembly and the high-pressure chamber is provided to compress the refrigerant using the pistons.
- the pistons are formed of a dual-head piston to alternatively compress the refrigerant to the high-pressure chambers of the front and rear housings.
- the refrigerant compressed to the high pressure chamber of the front housing is discharged to the rear housing through a communication passage formed between the cylinder and the bore, and is then further discharged to a discharge chamber of a manifold installed on an external side of the compressor.
- the valve assembly is formed between inner surfaces of the front and rear housings and external opposite ends of the cylinder to allow the refrigerant in the fluid passage to be introduced into the cylinder and to control the flow of the refrigerant when the introduced refrigerant is compressed by the pistons. That is, in accordance with the operation of the valve assembly, the refrigerant is introduced into the cylinder and compressed by the piston. The compressed refrigerant is discharged out of the compressor by the valve assembly.
- an engine or a motor may be used as a power source for rotating the driving shaft of the compressor.
- the motor is generally used for a scroll type compressor and a single-head swash plate type compressor.
- the compressor using the motor comprises a motor part and a compressing part for compressing the refrigerant.
- Japanese Laid-open patent publication No. 2001-193639 discloses a single-head swash plate type compressor in which gas that is primarily compressed at a side is recompressed by a piston corresponding to a next rotation turn.
- FIG. 1 is a sectional view of a compressor with an electromotive swash plate according to an embodiment of the present invention
- FIG. 2 is a perspective view of a cylinder block depicted in FIG. 1 ;
- FIG. 3 is a sectional view taken along line A-A of FIG. 1 ;
- FIG. 4 is a sectional view taken along line B-B of FIG. 1 ;
- FIG. 5 is a sectional view of a compressor with an electromotive swash plate according to another embodiment of the present invention.
- FIG. 6 is a sectional view taken along line C-C of FIG. 5 ;
- FIG. 7 is a sectional view taken along line D-D of FIG. 5 .
- the present invention provides a compressor with an electromotive swash plate, which can provide uniform discharge pressure.
- the preset invention also provides a compressor with an electromotive swash plate, which can improve compression efficiency.
- the present invention also provides a compressor with an electromotive swash plate, which can improve lubrication for the operation of a swash plate in a swash plate chamber.
- the present invention also provides a compressor with an electromotive swash plate, which has improved durability.
- the present invention also provides a compressor with an electromotive swash plate, which can stabilize a discharge pressure pulsation and a torque variation.
- a compressor with an electromotive swash plate comprising: a front housing having a front discharge chamber for discharging a firstly compressed refrigerant; a rear housing having a rear suction chamber communicating with the front discharge chamber to receive the firstly compressed refrigerant and a rear discharge chamber discharges a secondly compressed refrigerant, the rear suction chamber and the rear discharge chamber being divided by a partition; a cylinder block disposed between the front and rear housings, the cylinder block being provided with a swash plate chamber receiving the swash plate, a plurality of bores in which respective pistons are slidably installed, a discharge gas passage for assigning a refrigerant flow between the front and rear housings; a driving shaft mounted in the cylinder block, the driving shaft being rotated by a motor received in a motor chamber formed adjacent to one of the front and rear housings; and a plurality of dual-head pistons reciprocating in the bore due to the 5 inclination of the
- the compressor may further comprise a transferring unit for transferring the refrigerant introduced into the swash plate chamber to the motor chamber and a recovering unit for recovering the refrigerant from the motor chamber to the cylinder bores.
- the transferring unit may be a transferring passage formed through one of the front and rear housings to allow the swash plate chamber to communicate with the motor chamber.
- the recovering unit may be a suction passage formed through one of the front and rear housings to allow the motor chamber to communicate with the cylinder bores.
- the front housing may further comprise a front suction chamber communicating with the swash plate chamber through a low pressure communication passage formed on the cylinder block to receiving the refrigerant from the swash plate chamber.
- the rear suction chamber may be formed around the rear discharge chamber of the rear housing.
- the rear discharge chamber may be provided with a discharge passage defined by a discharge pipe for reducing a discharge pressure pulsation.
- the discharge gas passage may be formed to allow the front discharge chamber to communicate with the rear suction chamber.
- the above-described compressor according to the present invention has the following advantages.
- the lubrication for the operation of the swash plate can be maximized.
- the refrigerant directed to the motor chamber can prevents the motor efficiency from being deteriorated by demagnetisation due to the increase of the temperature.
- the motor efficiency can be prevented from being deteriorated by demagnetisation due to the increase of the temperature of the refrigerant.
- the inclined angle of the swash plate can be reduced, thereby improving durability of the compressor.
- FIG. 1 is a sectional view of a compressor having an electromotive swash plate according to an embodiment of the present invention.
- FIG. 2 is a perspective view of a cylinder block of the compressor.
- the compressor 10 comprises a driving shaft 13 driven by a power source 12 ; a swash plate 14 installed on the driving shaft 13 at a predetermined inclined angle to rotate together with the driving shaft 13 ; a plurality of double-head pistons 15 reciprocating by the rotation of the swash plate 14 ; a front housing 16 having a front suction chamber 16 a for receiving refrigerant and a front discharge chamber 16 b for discharging firstly compressed refrigerant, the front housing being divided by a partition; a rear housing 17 including a rear suction chamber 1 7 a and a rear discharge chamber 17 b divided by a partition, the rear suction chamber 17 a communicating with the front discharge chamber 16 b to receive the firstly compressed refrigerant and a rear discharge chamber 17 b for discharging secondly compressed refrigerant; a cylinder block 18 disposed between the front and rear housings 16 and 17 to rotatably support the driving shaft 13 , the cylinder block 18 being provided with a
- the power source 12 may be a motor 12 installed in a motor chamber 11 .
- a driving power of the engine may be directly used as the power source 12 .
- FIG. 3 shows a sectional view taken along line A-A of FIG. 1 , in which dotted lines indicate locations of the communication passages 18 d of the cylinder block 18 , a discharge gas passage 18 e , the piston 15 , suction and discharge valves 19 a and 19 b of the valve assembly 19 .
- the front housing 16 is provided in the center with a driving shaft mounting hole 16 c .
- the front discharge chamber 16 b for discharging the firstly compressed refrigerant is provided around the driving shaft mounting hole 16 c .
- the front suction chamber 16 a is provided around the front discharge chamber 16 b .
- the refrigerant is introduced into the front suction chamber 16 a through the suction passage 18 b of the cylinder block 18 according to the operation of the valve assembly 19 and is then firstly compressed by the pistons 15 .
- the firstly compressed refrigerant is directed to the front discharge chamber 16 b of the front housing 16 , and is then further directed to the rear suction chamber 17 a through the discharge gas passages 18 e.
- FIG. 4 shows a sectional view taken along line B-B of FIG. 1 , in which dotted lines indicate locations of the discharge gas passages 18 e , the pistons 15 , and the suction and discharge valves 19 a and 19 b of the valve assembly 19 .
- the rear housing 17 is provided with a driving mounting hole 17 c .
- the refrigerant is introduced from the front discharge chamber 16 b of the front housing 16 to the rear suction chamber 17 a of the rear housing 17 .
- the refrigerant is secondly compressed in the rear housing 17 and is then discharged to the external side through the discharge passage 17 d formed of a boss to reduce the discharge pressure pulsation.
- carbon dioxide that can enhance the reduction of displacement volume as compared with other refrigerants may be used.
- the space formed by the front housing 16 , a motor chamber 11 , and the rear housing 17 is partitioned.
- the front discharge chamber 16 b divided by an internal partition of the front housing 16 and the rear suction chamber 17 a divided by an internal partition of the rear housing 17 are communicated with each other by the discharge gas passages 18 e.
- the front housing 16 , the rear housing 17 , the motor housing 11 a defining the motor chamber 11 , and the cylinder block 18 are coupled to each other by bolts (not shown), defining a cylindrical shape of the compressor.
- the driving shaft 13 extends through a space defined by the motor chamber 11 and the front and rear housings 16 and 17 . Both ends of the driving shaft 13 are respectively supported on the motor housing 11 a and the cylinder block 18 by radial bearings 13 a and 13 b .
- the driving shaft 13 penetrates the mounting hole 16 c of the front housing 16 and a seal member (not shown) is tightly disposed between the driving shaft 13 and an inner circumference of the mounting hole 16 c.
- the power source 12 is a motor received in the motor chamber 11 , having a stator 12 a and a rotor 12 b rotating the driving shaft 13 .
- the swash plate 14 is fixed around the driving shaft 13 to rotate together with the driving shaft 13 . Opposite ends of the swash plate 14 are supported in the cylinder block 18 by thrust bearings 14 a.
- the cylinder block 18 includes front and rear cylinder blocks 18 ′ and 18 ′′that are assembled with each other.
- the suction passage 18 b introducing the refrigerant to the swash plate chamber 18 c is formed on an upper portion of the rear cylinder block 18 ′′.
- the suction passage 18 b may be formed on the front cylinder block 18 ′ as far as the suction passage 18 b is connected to the swash plate chamber 18 c .
- the cylinder block 18 is provided with cylinder bores 18 a in which the respective pistons 15 can reciprocate and the mounting hole 18 f for mounting the driving shaft 13 .
- the valve assembly 19 is disposed between the front housing 16 , the rear housing 17 and the cylinder block 18 to control the flow of the refrigerant between the suction chambers 16 a and 17 a , the discharge chambers 16 b and 17 b , and the bore 18 a.
- the refrigerant is introduced from the exterior to the front chamber 16 a of the front housing 16 via the suction passage 18 b and communication passage 18 d of the cylinder block 18 and the swash plate chamber 18 c , and the refrigerant functions as lubricant for the operation of the swash plate 14 .
- the refrigerant introduced into the front suction chamber 16 a is firstly compressed in the front housing 16 and stays in the front discharge chamber 16 b of the front housing 16 .
- the firstly compressed refrigerant is introduced into the rear suction chamber 17 a of the rear housing 17 via the discharge gas passage 18 e and is then secondly compressed.
- the secondly compressed refrigerant is discharged to the exterior via the rear discharge chamber 17 b of the rear housing 17 .
- FIG. 5 shows a compressor with an electromotive swash plate according to another embodiment of the present invention.
- a compressor 40 of this embodiment comprises a driving shaft 43 driven by a motor 42 disposed in a motor chamber 41 ; a swash plate 44 installed on the driving shaft 43 at a predetermined inclined angle to rotate together with the driving shaft 43 ; a plurality of double-head pistons 45 reciprocating by the rotation of the swash plate 44 ; a front housing 46 having a suction passage 46 a for receiving refrigerant from the motor chamber 41 and a front discharge chamber 46 b for discharging firstly compressed refrigerant; a rear housing 47 having a rear suction chamber 47 a communicating with the front discharge chamber 46 b to receive the firstly compressed refrigerant and a rear discharge chamber 47 b for discharging secondly compressed refrigerant; a cylinder block 48 disposed between the front and rear housings 46 and 47 to rotatably support the driving shaft 43 , the cylinder block 48 being provided with a plurality of bores 48 a in which the respective pistons 45 are slidably installed,
- the space formed by the front housing 46 , the motor chamber 41 adjacent to the front housing 46 , and the rear housing 17 is partitioned.
- the front housing 46 further include a suction passage 46 a receiving the refrigerant.
- the front discharge chamber 46 b and the rear suction chamber 47 a are communicated with each other by discharge gas passages 48 e (see FIG. 6 ).
- the front housing 46 , the rear housing 47 , the motor housing 41 a defining the motor chamber 41 , and the cylinder block 48 are coupled to each other by bolts (not shown), defining a cylindrical body of the compressor.
- the driving shaft 43 is formed extending through a space defined by the motor chamber 41 and the front and rear housings 46 and 47 . Both ends of the driving shaft 43 are respectively supported on the motor housing 41 a and the cylinder block 48 by radial bearings 43 a and 43 b .
- the driving shaft 43 penetrates a mounting hole 46 c of the front housing 46 and a seal member (not shown) is tightly disposed between the driving shaft 43 and an inner circumference of the mounting hole 46 c.
- the motor 42 is received in the motor chamber 41 , having a stator 42 a and a rotor 42 b rotating the driving shaft 43 .
- the swash plate 44 is fixed around the driving shaft 43 to rotate together with the driving shaft 43 .
- Opposite ends of the swash plate 44 are supported in the cylinder block 48 by thrust bearings 44 a.
- the cylinder block 48 includes front and rear cylinder blocks 48 ′ and 48 ′′ that are assembled with each other.
- the suction passage 48 b introducing the refrigerant to the swash plate chamber 48 c is formed on an upper portion of the rear cylinder block 48 ′′.
- the suction passage 48 b may be formed on the front cylinder block 48 ′ as far as it is connected to the swash plate chamber 48 c .
- the cylinder block 48 is provided with the cylinder bores 48 a in which the respective pistons 45 can reciprocate and the mounting hole 48 f for mounting the driving shaft 43 .
- the valve assembly 49 is disposed between the front housing 46 , the rear housing 47 and the cylinder block 48 to control the flow of the refrigerant between the suction passage 46 a , the front discharge chamber 46 b , the rear suction chamber 47 a , the rear discharge chamber 47 b , and the bores 48 a.
- FIG. 6 shows a sectional view taken along line C-C of FIG. 5 , in which dotted lines indicate locations of a discharge gas passage 48 e , the pistons 45 , a discharge valve 49 b of the valve assembly 49 .
- the front housing 46 is provided in the center with a driving shaft mounting hole 46 c .
- the front discharge chamber 46 b discharging the firstly compressed refrigerant is provided around the driving shaft mounting hole 46 c .
- the front suction passage 46 a is provided around the front discharge chamber 46 b .
- the refrigerant introduced into the motor chamber 41 through the refrigerant transferring passage 50 is supplied to the bores 48 a of the cylinder block 48 by the valve assembly 49 and is then firstly compressed by the piston 45 .
- the firstly compressed refrigerant is directed to the front discharge chamber 46 b of the front housing 16 , and is then further directed to the rear suction chamber 47 a through the discharge gas passages 48 e .
- the front housing 46 may further include a front suction chamber.
- FIG. 7 shows a sectional view taken along line D-D of FIG. 5 , illustrating the rear housing depicted in FIG. 5 .
- the rear housing 47 is provided with a driving mounting hole 47 c .
- the refrigerant introduced from the front discharge passage 46 b of the front housing 46 stays in the rear suction chamber 47 a of the rear housing 47 .
- the refrigerant is secondly compressed in the rear housing 47 and then stays in the rear discharge chamber 47 b of the rear housing 47 .
- the secondly compressed, high-temperature, high-pressure refrigerant is discharged to the exterior through the discharge passage 47 d formed of a boss reducing the discharge pulsation.
- the refrigerant is introduced from the external side to the swash plate chamber 48 c through the suction passage 48 b of the cylinder block 48 , and the refrigerant functions as lubricant for the operation of the swash plate 44 of the swash plate chamber 48 c .
- the refrigerant introduced into the swash plate 48 c is directed to the motor chamber 41 through the transferring passage 50 to cool the motor 42 , thereby preventing the motor efficiency from being deteriorated by demagnetisation due to the increase of the temperature.
- the refrigerant is then directed to the bores 48 a of the cylinder block 48 through the suction passage 46 a to be firstly compressed in the front housing 46 and stays in the front discharge. chamber 46 b of the front housing 46 .
- the first compressed refrigerant is introduced into the rear suction chamber 47 a of the rear housing 47 via the discharge gas passage 48 e .
- the refrigerant directed to the rear suction chamber 47 a is secondly compressed and is then discharged to the exterior through the rear discharge chamber 47 b of the rear housing 47 .
- the front and rear sides of the compressor may be exchanged.
- an engine may be used instead of the motor.
Abstract
A compressor with an electromotive swash plate includes a front housing having a front discharge chamber for discharging a firstly compressed refrigerant, a rear housing having a rear suction chamber communicating with the front discharge chamber to receive the firstly compressed refrigerant and a rear discharge chamber for discharging a secondly compressed refrigerant, the rear suction chamber and the rear discharge chamber being divided by a partition, a cylinder block disposed between the front and rear housings, the cylinder block being provided with a swash plate chamber receiving the swash plate, a plurality of bores in which respective pistons are slidably installed, a discharge gas passage for assigning refrigerant flow between the front and rear housings, a driving shaft mounted in the cylinder block, the driving shaft being rotated by a motor received in a motor chamber formed adjacent to one of the front and rear housings, and a plurality of dual-head pistons reciprocating in the bore due to the inclination of the swash plate.
Description
- The present invention relates to a compressor with an electromotive swash plate, and more particularly, to a multi-stage compressor with an electromotive swash plate.
- Generally, an air conditioner for a vehicle compresses a refrigerant in a compressor, condenses the compressed refrigerant in a condenser, and transmits the condensed refrigerant to an expansion valve. Then, the expansion valve converts the condensed refrigerant into wet vapor with low temperature and low pressure and transmits the wet vapor to an evaporator. The wet vapor transmitted to the evaporator is heat-exchanged with external air to absorb heat of the external air and is then returned to the compressor for recirculation.
- The compressor used for compressing the refrigerant functions to (a) intake a heat-exchange medium evaporated in the evaporator, (b) compress the heat-exchange medium, and (c) pump out the heat-exchange medium for the continuous circulation of the heat-exchange medium. Such a compressor is classified, according to a driving manner, into a swash plate type, a scroll type, a rotary type, and a wobble plate type.
- The swash plate type compressor comprises a cylinder block having a plurality of bores in which respective pistons reciprocate. The cylinder block is fixed by front and rear housings. A driving shaft is installed in a central portion of the cylinder block. A swash plate is inserted in the cylinder block and coupled to the driving shaft. As the swash plate rotates, the pistons successively reciprocate in a longitudinal direction of the cylinder block. The swash plate type compressor is classified into a single-head type, where the compression is realized in a sided portion, and a double-head type, where the compression is realized in opposite sides. The latter comprises low and high-pressure chambers formed in the rear housing. The low-pressure chamber is provided to allow the refrigerant to be introduced into the cylinder via a valve assembly and the high-pressure chamber is provided to compress the refrigerant using the pistons. The pistons are formed of a dual-head piston to alternatively compress the refrigerant to the high-pressure chambers of the front and rear housings. The refrigerant compressed to the high pressure chamber of the front housing is discharged to the rear housing through a communication passage formed between the cylinder and the bore, and is then further discharged to a discharge chamber of a manifold installed on an external side of the compressor.
- The valve assembly is formed between inner surfaces of the front and rear housings and external opposite ends of the cylinder to allow the refrigerant in the fluid passage to be introduced into the cylinder and to control the flow of the refrigerant when the introduced refrigerant is compressed by the pistons. That is, in accordance with the operation of the valve assembly, the refrigerant is introduced into the cylinder and compressed by the piston. The compressed refrigerant is discharged out of the compressor by the valve assembly.
- As a power source for rotating the driving shaft of the compressor, an engine or a motor may be used. The motor is generally used for a scroll type compressor and a single-head swash plate type compressor. The compressor using the motor comprises a motor part and a compressing part for compressing the refrigerant.
- Japanese Laid-open patent publication No. 2001-193639 discloses a single-head swash plate type compressor in which gas that is primarily compressed at a side is recompressed by a piston corresponding to a next rotation turn.
- In this swash type compressor, while the discharge direction of the refrigerant is uniform, but discharge pressure is not uniform, thereby deteriorating the operational reliability due to the variation of the discharge pressure pulsation and torque.
- The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:
-
FIG. 1 is a sectional view of a compressor with an electromotive swash plate according to an embodiment of the present invention; -
FIG. 2 is a perspective view of a cylinder block depicted inFIG. 1 ; -
FIG. 3 is a sectional view taken along line A-A ofFIG. 1 ; -
FIG. 4 is a sectional view taken along line B-B ofFIG. 1 ; -
FIG. 5 is a sectional view of a compressor with an electromotive swash plate according to another embodiment of the present invention; -
FIG. 6 is a sectional view taken along line C-C ofFIG. 5 ; and -
FIG. 7 is a sectional view taken along line D-D ofFIG. 5 . - Technical Goal of the Invention
- The present invention provides a compressor with an electromotive swash plate, which can provide uniform discharge pressure.
- The preset invention also provides a compressor with an electromotive swash plate, which can improve compression efficiency.
- The present invention also provides a compressor with an electromotive swash plate, which can improve lubrication for the operation of a swash plate in a swash plate chamber.
- The present invention also provides a compressor with an electromotive swash plate, which has improved durability.
- The present invention also provides a compressor with an electromotive swash plate, which can stabilize a discharge pressure pulsation and a torque variation.
- Disclosure of the Invention
- In an aspect of the present invention, there is provided a compressor with an electromotive swash plate, comprising: a front housing having a front discharge chamber for discharging a firstly compressed refrigerant; a rear housing having a rear suction chamber communicating with the front discharge chamber to receive the firstly compressed refrigerant and a rear discharge chamber discharges a secondly compressed refrigerant, the rear suction chamber and the rear discharge chamber being divided by a partition; a cylinder block disposed between the front and rear housings, the cylinder block being provided with a swash plate chamber receiving the swash plate, a plurality of bores in which respective pistons are slidably installed, a discharge gas passage for assigning a refrigerant flow between the front and rear housings; a driving shaft mounted in the cylinder block, the driving shaft being rotated by a motor received in a motor chamber formed adjacent to one of the front and rear housings; and a plurality of dual-head pistons reciprocating in the bore due to the 5 inclination of the swash plate.
- The compressor may further comprise a transferring unit for transferring the refrigerant introduced into the swash plate chamber to the motor chamber and a recovering unit for recovering the refrigerant from the motor chamber to the cylinder bores.
- The transferring unit may be a transferring passage formed through one of the front and rear housings to allow the swash plate chamber to communicate with the motor chamber.
- The recovering unit may be a suction passage formed through one of the front and rear housings to allow the motor chamber to communicate with the cylinder bores.
- The front housing may further comprise a front suction chamber communicating with the swash plate chamber through a low pressure communication passage formed on the cylinder block to receiving the refrigerant from the swash plate chamber.
- The rear suction chamber may be formed around the rear discharge chamber of the rear housing.
- The rear discharge chamber may be provided with a discharge passage defined by a discharge pipe for reducing a discharge pressure pulsation.
- The discharge gas passage may be formed to allow the front discharge chamber to communicate with the rear suction chamber.
- Effect of the Invention
- The above-described compressor according to the present invention has the following advantages.
- First, as the refrigerant is introduced into the swash plate chamber, the lubrication for the operation of the swash plate can be maximized.
- Second, the refrigerant directed to the motor chamber can prevents the motor efficiency from being deteriorated by demagnetisation due to the increase of the temperature.
- Third, as the compression is realized at opposite side to discharge high pressure and high temperature refrigerant, the motor efficiency can be prevented from being deteriorated by demagnetisation due to the increase of the temperature of the refrigerant.
- Fourth, since double-head pistons are used, the inclined angle of the swash plate can be reduced, thereby improving durability of the compressor.
- Fifth, since the discharge direction of the refrigerant is uniform and the refrigerant is stored in an identical chamber, the discharge pressure pulsation and the torque variation can be stabilized.
- Sixth, since the compression is realized twice, the compression efficiency can be improved.
- Seventh, since carbon dioxide is used as the refrigerant, the displacement volume can be reduced.
-
FIG. 1 is a sectional view of a compressor having an electromotive swash plate according to an embodiment of the present invention.FIG. 2 is a perspective view of a cylinder block of the compressor. - Referring to
FIGS. 1 and 2 , thecompressor 10 comprises a driving shaft 13 driven by apower source 12; aswash plate 14 installed on the driving shaft 13 at a predetermined inclined angle to rotate together with the driving shaft 13; a plurality of double-head pistons 15 reciprocating by the rotation of theswash plate 14; afront housing 16 having afront suction chamber 16 a for receiving refrigerant and afront discharge chamber 16 b for discharging firstly compressed refrigerant, the front housing being divided by a partition; arear housing 17 including a rear suction chamber 1 7 a and arear discharge chamber 17 b divided by a partition, therear suction chamber 17 a communicating with thefront discharge chamber 16 b to receive the firstly compressed refrigerant and arear discharge chamber 17 b for discharging secondly compressed refrigerant; acylinder block 18 disposed between the front andrear housings cylinder block 18 being provided with a plurality ofbores 18 ain which therespective pistons 15 are slidably installed, asuction passage 18 b through which the refrigerant is introduced from an external side, aswash plate chamber 18 c receiving theswash plate 14 and communicating thesuction passage 18 b, a plurality of communication passages (18 d inFIG. 3 ) communicating with both thefront suction chamber 16 a and theswash plate chamber 18 c; and avalve assembly 19 disposed between thefront housing 16, therear housing 17 and thecylinder block 18. Thepower source 12 may be amotor 12 installed in amotor chamber 11. Alternatively, a driving power of the engine may be directly used as thepower source 12. -
FIG. 3 shows a sectional view taken along line A-A ofFIG. 1 , in which dotted lines indicate locations of thecommunication passages 18 d of thecylinder block 18, adischarge gas passage 18 e, thepiston 15, suction anddischarge valves valve assembly 19. - Referring to
FIG. 3 , thefront housing 16 is provided in the center with a drivingshaft mounting hole 16 c. Thefront discharge chamber 16 b for discharging the firstly compressed refrigerant is provided around the drivingshaft mounting hole 16 c. Thefront suction chamber 16 a is provided around thefront discharge chamber 16 b. The refrigerant is introduced into thefront suction chamber 16 a through thesuction passage 18 b of thecylinder block 18 according to the operation of thevalve assembly 19 and is then firstly compressed by thepistons 15. The firstly compressed refrigerant is directed to thefront discharge chamber 16 b of thefront housing 16, and is then further directed to therear suction chamber 17 a through thedischarge gas passages 18 e. -
FIG. 4 shows a sectional view taken along line B-B ofFIG. 1 , in which dotted lines indicate locations of thedischarge gas passages 18 e, thepistons 15, and the suction anddischarge valves valve assembly 19. - Referring to
FIG. 4 , therear housing 17 is provided with adriving mounting hole 17 c. The refrigerant is introduced from thefront discharge chamber 16 b of thefront housing 16 to therear suction chamber 17 a of therear housing 17. The refrigerant is secondly compressed in therear housing 17 and is then discharged to the external side through thedischarge passage 17 d formed of a boss to reduce the discharge pressure pulsation. - As the refrigerant, carbon dioxide that can enhance the reduction of displacement volume as compared with other refrigerants may be used.
- The space formed by the
front housing 16, amotor chamber 11, and therear housing 17 is partitioned. Thefront discharge chamber 16 b divided by an internal partition of thefront housing 16 and therear suction chamber 17 a divided by an internal partition of therear housing 17 are communicated with each other by thedischarge gas passages 18 e. - The
front housing 16, therear housing 17, themotor housing 11 a defining themotor chamber 11, and thecylinder block 18 are coupled to each other by bolts (not shown), defining a cylindrical shape of the compressor. - The driving shaft 13 extends through a space defined by the
motor chamber 11 and the front andrear housings motor housing 11 a and thecylinder block 18 byradial bearings hole 16 c of thefront housing 16 and a seal member (not shown) is tightly disposed between the driving shaft 13 and an inner circumference of the mountinghole 16 c. - The
power source 12 is a motor received in themotor chamber 11, having astator 12 a and arotor 12 b rotating the driving shaft 13. Theswash plate 14 is fixed around the driving shaft 13 to rotate together with the driving shaft 13. Opposite ends of theswash plate 14 are supported in thecylinder block 18 bythrust bearings 14 a. - The
cylinder block 18 includes front andrear cylinder blocks 18′ and 18″that are assembled with each other. Thesuction passage 18 b introducing the refrigerant to theswash plate chamber 18 c is formed on an upper portion of therear cylinder block 18″. Thesuction passage 18 b may be formed on thefront cylinder block 18′ as far as thesuction passage 18 b is connected to theswash plate chamber 18 c. As described above, thecylinder block 18 is provided with cylinder bores 18 a in which therespective pistons 15 can reciprocate and the mountinghole 18 f for mounting the driving shaft 13. - The
valve assembly 19 is disposed between thefront housing 16, therear housing 17 and thecylinder block 18 to control the flow of the refrigerant between thesuction chambers discharge chambers bore 18 a. - The operation of the above-described compressor with the electromotive swash plate will be described hereinafter.
- The refrigerant is introduced from the exterior to the
front chamber 16 a of thefront housing 16 via thesuction passage 18 b andcommunication passage 18 d of thecylinder block 18 and theswash plate chamber 18 c, and the refrigerant functions as lubricant for the operation of theswash plate 14. The refrigerant introduced into thefront suction chamber 16 a is firstly compressed in thefront housing 16 and stays in thefront discharge chamber 16 b of thefront housing 16. The firstly compressed refrigerant is introduced into therear suction chamber 17 a of therear housing 17 via thedischarge gas passage 18 e and is then secondly compressed. The secondly compressed refrigerant is discharged to the exterior via therear discharge chamber 17 b of therear housing 17. -
FIG. 5 shows a compressor with an electromotive swash plate according to another embodiment of the present invention. - Referring to
FIG. 5 , a compressor 40 of this embodiment comprises a driving shaft 43 driven by a motor 42 disposed in a motor chamber 41; a swash plate 44 installed on the driving shaft 43 at a predetermined inclined angle to rotate together with the driving shaft 43; a plurality of double-head pistons 45 reciprocating by the rotation of the swash plate 44; a front housing 46 having a suction passage 46 a for receiving refrigerant from the motor chamber 41 and a front discharge chamber 46 b for discharging firstly compressed refrigerant; a rear housing 47 having a rear suction chamber 47 a communicating with the front discharge chamber 46 b to receive the firstly compressed refrigerant and a rear discharge chamber 47 b for discharging secondly compressed refrigerant; a cylinder block 48 disposed between the front and rear housings 46 and 47 to rotatably support the driving shaft 43, the cylinder block 48 being provided with a plurality of bores 48 a in which the respective pistons 45 are slidably installed, a suction passage 48 b through which the refrigerant is introduced from an external side, and a swash plate chamber 48 c receiving the swash plate 44 and communicating the suction passage 48 b; a valve assembly 49 disposed between the front housing 46, the rear housing 47 and the cylinder block 48; and a refrigerant transfer passage 50 for transferring the refrigerant from the swash plate chamber 48 c to the motor chamber 41. - The space formed by the
front housing 46, themotor chamber 41 adjacent to thefront housing 46, and therear housing 17 is partitioned. Thefront housing 46 further include asuction passage 46 a receiving the refrigerant. Thefront discharge chamber 46 b and therear suction chamber 47 a are communicated with each other bydischarge gas passages 48 e (seeFIG. 6 ). - The
front housing 46, therear housing 47, themotor housing 41 a defining themotor chamber 41, and thecylinder block 48 are coupled to each other by bolts (not shown), defining a cylindrical body of the compressor. - The driving
shaft 43 is formed extending through a space defined by themotor chamber 41 and the front andrear housings shaft 43 are respectively supported on themotor housing 41 a and thecylinder block 48 byradial bearings shaft 43 penetrates a mountinghole 46 c of thefront housing 46 and a seal member (not shown) is tightly disposed between the drivingshaft 43 and an inner circumference of the mountinghole 46 c. - The
motor 42 is received in themotor chamber 41, having astator 42 a and arotor 42 b rotating the drivingshaft 43. Theswash plate 44 is fixed around the drivingshaft 43 to rotate together with the drivingshaft 43. Opposite ends of theswash plate 44 are supported in thecylinder block 48 bythrust bearings 44 a. - The
cylinder block 48 includes front andrear cylinder blocks 48′ and 48″ that are assembled with each other. Thesuction passage 48 b introducing the refrigerant to theswash plate chamber 48 c is formed on an upper portion of therear cylinder block 48″. Thesuction passage 48 b may be formed on thefront cylinder block 48′ as far as it is connected to theswash plate chamber 48 c. As described above, thecylinder block 48 is provided with the cylinder bores 48 a in which therespective pistons 45 can reciprocate and the mountinghole 48 f for mounting the drivingshaft 43. - The
valve assembly 49 is disposed between thefront housing 46, therear housing 47 and thecylinder block 48 to control the flow of the refrigerant between thesuction passage 46 a, thefront discharge chamber 46 b, therear suction chamber 47 a, therear discharge chamber 47 b, and thebores 48 a. -
FIG. 6 shows a sectional view taken along line C-C ofFIG. 5 , in which dotted lines indicate locations of adischarge gas passage 48 e, thepistons 45, adischarge valve 49 b of thevalve assembly 49. - Referring to
FIG. 6 , thefront housing 46 is provided in the center with a drivingshaft mounting hole 46 c. Thefront discharge chamber 46 b discharging the firstly compressed refrigerant is provided around the drivingshaft mounting hole 46 c. Thefront suction passage 46 a is provided around thefront discharge chamber 46 b. The refrigerant introduced into themotor chamber 41 through therefrigerant transferring passage 50 is supplied to thebores 48 a of thecylinder block 48 by thevalve assembly 49 and is then firstly compressed by thepiston 45. The firstly compressed refrigerant is directed to thefront discharge chamber 46 b of thefront housing 16, and is then further directed to therear suction chamber 47 a through thedischarge gas passages 48 e. Although not illustrated, thefront housing 46 may further include a front suction chamber. -
FIG. 7 shows a sectional view taken along line D-D ofFIG. 5 , illustrating the rear housing depicted inFIG. 5 . - Referring to
FIG. 7 , therear housing 47 is provided with adriving mounting hole 47 c. The refrigerant introduced from thefront discharge passage 46 b of thefront housing 46 stays in therear suction chamber 47 a of therear housing 47. The refrigerant is secondly compressed in therear housing 47 and then stays in therear discharge chamber 47 b of therear housing 47. The secondly compressed, high-temperature, high-pressure refrigerant is discharged to the exterior through thedischarge passage 47 d formed of a boss reducing the discharge pulsation. - As the refrigerant for the above-described compressor with the electromotive swash plate, carbon dioxide that can enhance the reduction of displacement volume as compared with other refrigerants may be used.
- The operation of the above-described compressor with the electromotive swash plate will be described hereinafter.
- The refrigerant is introduced from the external side to the
swash plate chamber 48 c through thesuction passage 48 b of thecylinder block 48, and the refrigerant functions as lubricant for the operation of theswash plate 44 of theswash plate chamber 48 c. The refrigerant introduced into theswash plate 48 c is directed to themotor chamber 41 through the transferringpassage 50 to cool themotor 42, thereby preventing the motor efficiency from being deteriorated by demagnetisation due to the increase of the temperature. The refrigerant is then directed to thebores 48 a of thecylinder block 48 through thesuction passage 46 a to be firstly compressed in thefront housing 46 and stays in the front discharge.chamber 46 b of thefront housing 46. The first compressed refrigerant is introduced into therear suction chamber 47 a of therear housing 47 via thedischarge gas passage 48 e. The refrigerant directed to therear suction chamber 47 a is secondly compressed and is then discharged to the exterior through therear discharge chamber 47 b of therear housing 47. - The front and rear sides of the compressor may be exchanged. In addition, as the power source, an engine may be used instead of the motor.
- While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (8)
1. A compressor with an electromotive swash plate, comprising:
a front housing having a front discharge chamber for discharging a firstly compressed refrigerant;
a rear housing having a rear suction chamber communicating with the front discharge chamber to receive the firstly compressed refrigerant and a rear discharge chamber for discharging a secondly compressed refrigerant, the rear suction chamber and the rear discharge chamber being divided by a partition;
a cylinder block disposed between the front and rear housings, the cylinder block being provided with a swash plate chamber receiving the swash plate, a plurality of bores in which respective pistons are slidably installed, a discharge gas passage for assigning a refrigerant flow between the front and rear housings;
a driving shaft mounted in the cylinder block, the driving shaft being rotated by a motor received in a motor chamber formed adjacent to one of the front and rear housings; and
a plurality of dual-head pistons reciprocating in the bore due to the inclination of the swash plate.
2. The compressor of claim 1 , further comprising a transferring unit for transferring the refrigerant introduced into the swash plate chamber to the motor chamber and a recovering unit for recovering the refrigerant from the motor chamber to the cylinder bores.
3. The compressor of claim 2 , wherein the transferring unit is a transferring passage formed through one of the front and rear housings to allow the swash plate chamber to communicate with the motor chamber.
4. The compressor of claim 2 , wherein the recovering unit is a suction passage formed adjacent to one of the front and rear housings to allow the motor chamber to communicate with the cylinder bores.
5. The compressor of claim 1 , wherein the front housing further comprises a front suction chamber communicating with the swash plate chamber through a low pressure communication passage formed on the cylinder block to receive the refrigerant.
6. The compressor of claim 1 , wherein the rear suction chamber is formed around the rear discharge chamber of the rear housing.
7. The compressor of claim 1 , wherein the rear discharge chamber is provided with a discharge passage defined by a discharge pipe for reducing a discharge pressure pulsation.
8. The compressor of claim 1 , wherein the discharge gas passage is formed to allow the front discharge chamber to communicate with the rear suction chamber.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20030025709 | 2003-04-23 | ||
KR10-2003-0025709 | 2003-04-23 | ||
KR1020040027727A KR20040092455A (en) | 2003-04-23 | 2004-04-22 | Electromotive swash plate type compressor |
KR10-2004-0027727 | 2004-04-22 | ||
PCT/KR2004/000942 WO2004094825A1 (en) | 2003-04-23 | 2004-04-23 | Electromotive swash plate type compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070020118A1 true US20070020118A1 (en) | 2007-01-25 |
Family
ID=33312682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/554,000 Abandoned US20070020118A1 (en) | 2003-04-23 | 2004-04-23 | Electromotive swash plate type compressor |
Country Status (2)
Country | Link |
---|---|
US (1) | US20070020118A1 (en) |
WO (1) | WO2004094825A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016202445A1 (en) * | 2015-06-16 | 2016-12-22 | Linde Aktiengesellschaft | Axial piston machine |
CN106762520A (en) * | 2017-02-03 | 2017-05-31 | 南京奥特佳祥云冷机有限公司 | Electronic variable compressor |
CN112412739A (en) * | 2019-08-22 | 2021-02-26 | 现代自动车株式会社 | Multistage compressor and control method thereof |
DE102020112664A1 (en) | 2020-05-11 | 2021-11-11 | OET GmbH | Reciprocating compressor for generating oil-free compressed air |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100374738C (en) * | 2006-03-10 | 2008-03-12 | 中国矿业大学 | Self-lubricating water motor with axial plunger |
DE102006034334B3 (en) * | 2006-07-19 | 2008-01-10 | Visteon Global Technologies Inc., Van Buren | Compressor cylinder head, for a vehicle air conditioning system, has outer and inner ring walls with an inner acoustic damper wall and chamber |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5921756A (en) * | 1995-12-04 | 1999-07-13 | Denso Corporation | Swash plate compressor including double-headed pistons having piston sections with different cross-sectional areas |
US20010007635A1 (en) * | 2000-01-11 | 2001-07-12 | Naoya Yokomachi | Electric type swash plate compressor |
US7076963B2 (en) * | 2002-03-06 | 2006-07-18 | Sanden Corporation | Two-stage compressor for an automotive air conditioner, which can be driven by a vehicle running engine and an electric motor different therefrom |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001200785A (en) * | 2000-01-18 | 2001-07-27 | Toyota Autom Loom Works Ltd | Electrically driven swash plate compressor |
JP3370046B2 (en) * | 2000-03-30 | 2003-01-27 | 三洋電機株式会社 | Multi-stage compressor |
-
2004
- 2004-04-23 US US10/554,000 patent/US20070020118A1/en not_active Abandoned
- 2004-04-23 WO PCT/KR2004/000942 patent/WO2004094825A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5921756A (en) * | 1995-12-04 | 1999-07-13 | Denso Corporation | Swash plate compressor including double-headed pistons having piston sections with different cross-sectional areas |
US20010007635A1 (en) * | 2000-01-11 | 2001-07-12 | Naoya Yokomachi | Electric type swash plate compressor |
US7076963B2 (en) * | 2002-03-06 | 2006-07-18 | Sanden Corporation | Two-stage compressor for an automotive air conditioner, which can be driven by a vehicle running engine and an electric motor different therefrom |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016202445A1 (en) * | 2015-06-16 | 2016-12-22 | Linde Aktiengesellschaft | Axial piston machine |
CN106762520A (en) * | 2017-02-03 | 2017-05-31 | 南京奥特佳祥云冷机有限公司 | Electronic variable compressor |
CN112412739A (en) * | 2019-08-22 | 2021-02-26 | 现代自动车株式会社 | Multistage compressor and control method thereof |
DE102020112664A1 (en) | 2020-05-11 | 2021-11-11 | OET GmbH | Reciprocating compressor for generating oil-free compressed air |
Also Published As
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WO2004094825A1 (en) | 2004-11-04 |
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Owner name: HALLA CLIMATE CONTROL CORPORATION, KOREA, REPUBLIC Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHOI, JEONG WON;REEL/FRAME:017886/0883 Effective date: 20051012 |
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