KR100876530B1 - The reciprocation type 4 cycle second compressor - Google Patents

Abstract

A reciprocating 4-cycle 2-stage compressor is provided to obtain slim and high efficient compressor at a low cost. A reciprocating 4-cycle 2-stage compressor includes a main body case(100), four cylinder blocks(200), a rotation cam(300), and an eccentric cam(400). The case and the cover are semi-closed type for simple repair or the exchange of component parts. Cylinders in each pair are disposed facing each other with a predetermined distance and two sets of the cylinders are disposed intersectingly in a slim structure so as to carry out suction and discharge strokes alternately and repeatedly, thereby reducing the load of a motor while increasing a gas discharge amount. Four pistons(201) in the cylinder blocks are pumped by a single BLDC motor(102), wherein two of the pistons help amplification and the centrifugal force of the motor and the other two pistons increase the discharge pressure and the discharge amount of compressed gas.

Description

Reciprocation type 4 cycle second compressor

The present invention relates to a reciprocating four-cycle two-stage compressor, to provide a reciprocating four-cycle two-stage compressor to reduce the operating load of the drive motor by operating four reciprocating pistons simultaneously with one drive motor.

A general compressor is a device used to compress a refrigerant at high pressure in a refrigeration cycle such as an air conditioner, and is a device that continuously compresses, condenses, expands, and evaporates a refrigerant.

Compressor is divided into reciprocating type and rotary type according to structure, and reciprocating type is divided into crank type, swash plate type, wobble plate type, and rotary type is vane rotary type and scroll type, and there is variable capacity type that can change other volume. .

A general electric compressor is composed of a motor unit in which an electric motor is installed and a compression unit for compressing a refrigerant. A means provided to prevent heat generation from an electric motor rotating at high speed is primarily a suctioned refrigerant passing through the electric motor chamber. Afterwards, there is a technique for performing a compression action in the compression unit, such as Japanese Patent Application Laid-Open No. 9-32729, or a method of inducing refrigerant to the motor unit to cool it and recompressing it through the low pressure side of the compressor. The oil contained therein also has a problem in that the amount of oil supplied to the compression unit requiring lubrication in the process of passing through the motor chamber is insufficient, resulting in reduced durability and noise.

On the other hand, according to Korean Patent No. 10-0459461 'two-stage reciprocating compressor' to install one reciprocating motor in the casing and coupling the first compression unit and the second compression unit to the mover of the reciprocating motor, respectively. In this way, high compression ratio operation is performed with one compressor by alternately arranging the compression stroke and the suction stroke of the two compressors, but the configuration is complicated as compared with the general crank type, resulting in an increase in manufacturing cost.

According to another domestic technology, Korean Patent Registration No. 10-653622, a hermetic reciprocating multi-cylinder compressor, which is a sealed reciprocating multi-cylinder compressor, the cylinder of the same shape around a central eccentric shaft rotated together with the crank shaft There is a technique to improve the compression efficiency by providing a plurality of radially, by performing a plurality of compression by one rotation of the eccentric shaft, but as described above to build a plurality of cylinders radially on one eccentric shaft As long as the rotation ring is spaced up and down by one eccentric shaft, there is no problem up to two cylinders. However, when a plurality of cylinders are constructed in multiple stages on the eccentric shaft, the length of the eccentric shaft is extended to the height corresponding to each rotation ring. The durability of the motor is reduced and the cause of noise may occur.In addition, the height of each cylinder block Therefore consists of only is found to result in an increase in production cost.

Therefore, the present invention is to provide a reciprocating four-cycle two-stage compressor using a BLDC electric motor as a power source of the above-mentioned compressor, the rotation on the same plane of the fixed hub coupled to the center of one electric motor eccentric shaft The present invention provides a reciprocating four-cycle two-stage compressor that allows a plurality of cylinders to be radially constructed in a combined rotary link, thereby providing a low-cost, slip-type and high-efficiency compressor, compared to conventional multi-stage compressors. There is an object of the invention.

In order to achieve the above object, in the present invention, the cover 101 is provided with a gas suction pipe 104 and the gas discharge pipe 105, and assembled the BLDC electric motor 102 by the electric motor fixing bolt 102b in the center portion. Wow; The drain bolt 107 is provided on the outside of the bottom, and the suspension body 103 is provided on the suspension bracket 103 'integrally provided at the four corners, and the compressor body case 100 is assembled with the cover by the body assembly bolt 106. And

'형의 실린더조립파일(200a)을 실린더조립파일고정볼트(200b)로 조립하여, 제1실린더(A)와 제3실린더(C)는 상기 실린더조립파일(200a)의 양 요홈부에 실린더고정볼트(205)의 머리를 끼워 실린더고정볼트너트부(206)으로 조립하며, 제2실린더(B)와 제4실린더(D)는 상 기 실린더고정볼트너트부(206)와 실린더거치부(207)에 실린더고정볼트(205)로 조립하되, A cylinder fixing bolt nut portion 206 is provided at the outside of the bottom of the compressor body case, and a cylinder mounting portion 207 is provided at a predetermined height to correspond to each other at the bottom side wall. So that the longitudinal cross section is

'Assembling the cylinder assembly pile (200a) of the cylinder assembly pile fixing bolt (200b), the first cylinder (A) and the third cylinder (C) is fixed to both grooves of the cylinder assembly pile (200a) The head of the bolt 205 is assembled to the cylinder fixing bolt nut part 206, and the second cylinder B and the fourth cylinder D are the cylinder fixing bolt nut part 206 and the cylinder mounting part 207. ) To the cylinder fixing bolt (205),

One end of the piston rod 202 is coupled to the piston 201 in each of the assembled cylinders by the piston pin 203, and the second end of the piston rod 202 is connected to the rotary link 300 in which the hinge 302 is integrally formed in all directions. It is coupled to the piston rod pin 204, the fixed hub 301 which is a bearing metal is coupled to the center of the rotary link, the fixed hub center is fixed to the eccentric shaft 401 formed on the eccentric cam 400, the eccentric back side eccentric The center of the cam is tapered and assembled with the electric motor shaft 102a of the BLDC electric motor.

In addition, the gas sucked through the gas suction pipe 104 is branched into each suction valve 208a of the second cylinder (B) and the third cylinder (C), and the primary pressure in the second cylinder (B) The gas is sucked into the intake valve 208a of the fourth cylinder D through the discharge valve 208b of the second cylinder B, and the gas that is pressurized secondly forms the discharge valve 208b of the fourth cylinder D. The gas is piped to the gas discharge pipe 105 through the gas, the primary pressure in the third cylinder (C) through the intake valve 208a of the first cylinder (A) through the discharge valve of the third cylinder (C) Intake and secondary pressurized gas is discharged through the discharge valve 208b of the first cylinder A, and the pipe is discharged to the gas discharge pipe 105 to which the discharge valve 208b of the fourth cylinder D is piped. Therefore, the manufacturing cost is lower than that of the conventional multi-stage compressor, and the slip type and high efficiency compressor are provided.

The main body case and the cover of the reciprocating four-cycle two-stage compressor according to the present invention are semi-closed and easy to repair and replace consumables. By repeating the stroke to cross the suction stroke and the discharge stroke in two cylinders, four pistons are pumped with one BLDC motor, reducing the load on the motor and increasing the gas output compared to other multistage compressors. Two to support the amplification and centrifugal force of the motor, and two to increase the discharge pressure and discharge amount of the compressed gas constantly, so that it can be widely applied to the conventional refrigeration equipment, various vacuum and compressor or direct hydraulic pressure. It is one useful invention.

In addition, the present invention has improved the starting, control and efficiency by the application of the BLDC motor, the length of the eccentric shaft is extended to the height corresponding to each rotating ring as in the case of building a plurality of cylinders on the eccentric shaft in the past, Durability is lowered due to excessive force, eliminating the cause of noise, and the manufacturing cost is reduced compared to the cylinder block is made of a multi-stage, and the slip method is a useful invention as a high performance compressor with a minimum volume and light weight.

In order to achieve the above object, a preferred embodiment of the present invention will be described in detail.

Prior to the description according to the present invention, the same reference numerals refer to only one of the components selected from each of the first cylinder (A), the second cylinder (B), the third cylinder (C), and the fourth cylinder (D). Bookkeeping.

1 is an attempt to reciprocating a four-cycle two-stage compressor according to an embodiment of the present invention, Figure 2 is an exploded perspective view omitting some pipe lines of the reciprocating four-cycle two-stage compressor according to the present invention,

A cover 101 having a gas suction pipe 104 and a gas discharge pipe 105 and assembled with a BLDC electric motor 102 by an electric motor fixing bolt 102b at a central portion thereof; The drain bolt 107 is provided on the outside of the bottom, and the suspension body 103 is provided on the suspension bracket 103 'integrally provided at the four corners, and the compressor body case 100 is assembled with the cover by the body assembly bolt 106. And

'형의 실린더조립파일(200a)을 실린더조립파일고정볼트(200b)로 조립하여, 제1실린더(A)와 제3실린더(C)는 상기 실린더조립파일(200a)의 양 요홈부에 실린더고정볼트(205)의 머리를 끼워 실린더고정볼트너트부(206)으로 조립하며, 제2실린더(B)와 제4실린더(D)는 상기 실린더고정볼트너트부(206)와 실린더거치부(207)에 거치하여 실린더고정볼트(205)로 조립하되, A cylinder fixing bolt nut portion 206 is provided at the outside of the bottom of the compressor body case, and a cylinder mounting portion 207 is provided at a predetermined height so as to correspond to each other at a predetermined height. So that the longitudinal cross section is

'Assembling the cylinder assembly pile (200a) of the cylinder assembly pile fixing bolt (200b), the first cylinder (A) and the third cylinder (C) is fixed to both grooves of the cylinder assembly pile (200a) The head of the bolt 205 is assembled to the cylinder fixing bolt nut part 206, and the second cylinder B and the fourth cylinder D are the cylinder fixing bolt nut part 206 and the cylinder mounting part 207. Mounted on the cylinder fixing bolt 205, but assembled

One end of the piston rod 202 is coupled to the piston 201 in each of the assembled cylinders by the piston pin 203, and the second end of the piston rod 202 has a rotary link 300 in which the hinge 302 is integrally formed in all directions. Piston rod pin 204 is coupled to, the center of the rotary link is a bearing hub fixed metal 301 is coupled, the fixed hub center is fixed to the eccentric shaft 401 formed on the eccentric cam 400, eccentric At the center of the eccentric cam on the rear of the shaft, the taper is assembled and fixed to the electric motor shaft 102a of the BLDC electric motor.

In the drawing, reference numeral 208 denotes a muffler provided in the cylinder of the compressor, and the gas suction pipe 104 and the gas discharge pipe 105 each having an intake valve 208a and a discharge valve 208b formed in the inner cylinder head of the muffler. ) Are each formed.

On the other hand, as shown in Figure 3 which is a reference plan view showing the stroke of the radially constructed cylinder in the rotary link rotatably coupled on the same plane of the fixed hub coupled to the center of one electric motor eccentric shaft according to the present invention The piping lines of the intake valve 208a and the discharge valve 208b of each cylinder in the compressor body case 100 according to the present invention are as follows.

The gas drawn in through the gas suction pipe 104 of the entire compressor is branched into each of the intake valves 208a of the second cylinder B and the third cylinder C, and the primary pressure is applied to the second cylinder B. The gas is sucked into the intake valve 208a of the fourth cylinder D through the discharge valve 208b of the second cylinder B, and the gas that is pressurized secondly forms the discharge valve 208b of the fourth cylinder D. The gas is piped to the gas discharge pipe 105 through, the first pressurized gas in the third cylinder (C) through the intake valve 208a of the first cylinder (A) through the discharge valve of the third cylinder (C) Intake and secondary pressurized gas is discharged through the discharge valve 208b of the first cylinder A, and the discharge valve 208b of the fourth cylinder D is piped to the gas discharge pipe 105. Construct piping.

Accordingly, one embodiment of the present invention configured as described above will be described with reference to the accompanying drawings.

Reference diagram showing an eccentric axis of the reciprocating four-cycle two-stage compressor according to FIG. 3 at -45 ° to 90 ° with a 45 ° rotation angle unit, and an eccentric shaft of the reciprocating four cycle two-stage compressor with a 45 ° rotation angle unit As shown in Figs. 4 and 5, which are reference diagrams showing a stroke of 135 ° to 276 °,

The fixed hub 301 of the fixed hub 301 is rotated as the fixed hub 301 is fixed to the eccentric shaft 401 fixed to the eccentric cam 400, the center of which is tapered to the electric motor shaft of the BLDC electric motor according to the present invention The rotary link 300, which is a bearing metal chain embedded in the outer diameter portion, is rotated by the eccentric cam. In the present invention, the eccentric cam is rotated counterclockwise for convenience.

As shown in Fig. 4B, when the eccentric shaft 401 is at a -45 ° rotation angle, the first cylinder A is at the end of the compression stroke, and the second cylinder B is at the stroke time at the compression time. , The third cylinder (C) is the stroke immediately before the completion of suction, the fourth cylinder (D) represents the stroke state immediately after the suction.

Next, as shown in (ii) of FIG. 4, when the eccentric shaft 401 is rotated at 0 °, the first cylinder A is in a stroke state just before the discharge is finished, and the second cylinder B is in a stroke state just after the discharge. The cylinder C shows the stroke state just before the suction is completed, and the fourth cylinder D shows the stroke state immediately after the suction.

Next, in FIG. 4 (i), the eccentric shaft 401 has a 45 ° rotation angle, and the first cylinder A shows the stroke state immediately after suction, and the second cylinder B shows the stroke state immediately before the end of discharge. The three cylinders C represent the stroke state immediately after discharge, and the fourth cylinder D represents the stroke state immediately before the end of suction.

Next, in FIG. 4 (i), the eccentric shaft 401 is rotated at 90 degrees, and the first cylinder A is in the stroke state during the suction, and the second cylinder B is the stroke state in the discharge end state. The three cylinders C represent the stroke state during discharge, and the fourth cylinder D shows the stroke state at the end of suction.

On the other hand, in FIG. 5 (i), the eccentric shaft has a 135 ° rotation angle, and the first cylinder A has a stroke state just before the suction end, and the second cylinder B has a stroke state just before the suction, and the third cylinder. (C) shows the stroke state immediately before the end of the discharge, and the fourth cylinder D shows the stroke state immediately after the discharge.

Next, in Fig. 5 (ii), the eccentric shaft is rotated 180 degrees, and the first cylinder (A) is in the stroke state of the suction end state, the second cylinder (B) is in the stroke state during the suction, and the third cylinder ( C) denotes the stroke state of the discharge end, and the fourth cylinder D denotes the stroke state during discharge.

Next, in FIG. 5 (i), the eccentric shaft has a rotation angle of 225 ° and the first cylinder A has a stroke state immediately after discharge, and the second cylinder B has a stroke state just before the end of suction, and the third cylinder ( C) denotes the stroke state immediately after suction, and the fourth cylinder D denotes the stroke state immediately before the end of discharge.

Next, in (i) of FIG. 5, the eccentric shaft has a rotation angle of 270 °, and the first cylinder A shows the stroke state during discharge, the second cylinder B shows the stroke state of the suction end, and the third cylinder ( C) denotes the stroke state during suction, and the fourth cylinder D denotes the stroke state of the end of discharge.

While repeating the reciprocating four-cycle stroke according to the present invention as described above, as shown in Figure 3, the gas introduced through the gas suction pipe 104 of the compressor is the second cylinder (B) and the third cylinder (C). In the state of being branched and piped to the intake valve 208a provided in each muffler 208 of FIG. 4, according to each stroke cycle of FIG. 4, the 2nd cylinder B is made into the stroke state just after discharge, and the intake valve ( Since 208a is closed, the gas is sucked only through the intake valve 208a of the third cylinder C, and after the maximum suction at the next stroke, the intake valve 208a is closed and the discharge valve 208b is opened. The first pressurized gas is introduced through the intake valve 208a piped to the first cylinder A, which is in the stroke state immediately before the suction, and the suction stroke lowering the piston 201 of the first cylinder is attenuated. At the same time as the efficiency is increased, the secondary pressurized gas is discharged from the first cylinder A in the next stroke. To discharge the high compression gas, the efficiency improvements via (208b) to the gas discharge pipe 105.

As described above, the reciprocating four-cycle two-stage compressor according to the present invention operates four reciprocating pistons at the same time with one BLDC driving motor to reduce the driving load of the driving motor, and has a high compression efficiency, resulting in excellent freezing capacity. Short and economical, four-way centrifugal cylinder arrangement provides good balance, reducing vibration and noise, and low temperature type makes it a versatile refrigeration compressor for ships, tuna storage and microbial storage. Other small, lightweight, reciprocating four-cycle two-stage compressors are also suitable for printing equipment or aircraft.

'형으로 구비된 실린더고정파일(200a)의 양편 요홈부는 대응 설치되는 각 실린더블럭(200)의 간격을 가변시켜 실린더고정볼트(205)의 머리를 끼워 조립시키도록 하는 것이다.On the other hand, the longitudinal cross-section corresponding to the bottom outer of the compressor body case 100 according to the present invention '

The grooves on both sides of the cylinder fixing pile 200a provided in a 'shape' form the variable heads of the cylinder fixing bolts 205 by varying the intervals of the corresponding cylinder blocks 200.

This is a cylinder block 200 fixed to the cylinder fixing bolt nut portion 206 and the cylinder mounting portion 207 fixedly installed to correspond to the bottom outside of the compressor body case 100 orthogonal to the cylinder fixing pile 200a. By differentiating and fixedly installed by adjusting the distance between the cylinder block on the cylinder fixing pile (200a), it is possible to vary the stroke distance of the four-cycle stroke piston rod 202 according to the present invention.

This is to reduce the pipe diameter of the gas sucked in the first stage and discharged by the first compression relatively to the suction line to introduce the pressurized gas to the suction valve in the second stage cylinder. However, it is effective in correcting the delay time of intake through the intake valve. This is a useful invention that reduces the motor load when restarting after stopping operation according to Pascal's principle.

The suspension 103 according to the present invention is effective for attenuating vibrations according to different cycles and unbalance of each cylinder.

On the other hand, inside the compressor body case 100 to fill a certain amount according to the role of the cooling oil according to the supply of lubrication oil and the cylinder compression, the bearing metal surface of each cylinder and the fixed hub and the rotary link or various links and connecting pins, The drain bolt 107 is to be replaced periodically.

1 is a perspective view of a reciprocating four-cycle two-stage compressor according to an embodiment of the present invention.

Figure 2 is an exploded perspective view omitting a part of the piping line of the reciprocating four-cycle two-stage compressor according to the present invention.

Figure 3 is a reference plan view showing the stroke of a cylinder radially constructed in the rotary link rotatably coupled on the same plane of the fixed hub coupled to the center of one electric motor eccentric shaft in accordance with the present invention.

Figure 4 is a reference diagram showing the stroke of the eccentric shaft of the reciprocating four-cycle two-stage compressor according to Figure 3 is -45 ° to 90 ° in units of 45 ° rotation angle.

5 is a reference diagram showing an eccentric shaft of the reciprocating four-cycle two-stage compressor according to FIG. 3 having a stroke of 135 ° to 276 ° in units of a 45 ° rotation angle.

※ Explanation of code for main part of drawing.

100: compression body case 101: cover

102: BLDC electric motor 102a: tapered electric motor shaft

103b: Electric motor fixing bolt

103: suspension 103 ': suspension bracket

104: gas suction pipe 105: gasoline discharge pipe

106: body assembly bolt 107: drain bolt

200: cylinder block 200a: cylinder assembly file

200b: Cylinder assembly file assembly bolt

201: Piston

202: piston rod 203: piston pin

204: piston rod pin 205: cylinder fixing bolt

206: cylinder fixing bolt nut part 207: cylinder mounting part

208: muffler 208a: suction valve

208b: discharge valve

300: rotary link 301: fixed hub

302: hinge

400: eccentric cam 401: eccentric shaft

A: 1st cylinder B: 2nd cylinder

C: 3rd cylinder D: 4th cylinder

Claims (2)

A cover 101 having a gas suction pipe 104 and a gas discharge pipe 105 and assembled with a BLDC electric motor 102 by an electric motor fixing bolt 102b at a central portion thereof; The drain bolt 107 is provided on the outside of the bottom, and the suspension body 103 is provided on the suspension bracket 103 'integrally provided at the four corners, and the compressor body case 100 is assembled with the cover by the body assembly bolt 106. And A cylinder fixing bolt nut portion 206 is provided at the outside of the bottom of the compressor body case, and a cylinder mounting portion 207 is provided at a predetermined height so as to correspond to each other at a predetermined height. So that the longitudinal cross section is

'Assembling the cylinder assembly pile (200a) of the cylinder assembly pile fixing bolt (200b), the first cylinder (A) and the third cylinder (C) is fixed to both grooves of the cylinder assembly pile (200a) The head of the bolt 205 is assembled to the cylinder fixing bolt nut part 206, and the second cylinder B and the fourth cylinder D are the cylinder fixing bolt nut part 206 and the cylinder mounting part 207. Mounted on the cylinder fixing bolt 205, but assembled One end of the piston rod 202 is coupled to the piston 201 in each of the assembled cylinders by the piston pin 203, and the second end of the piston rod 202 has a rotary link 300 in which the hinge 302 is integrally formed in all directions. Piston rod pin 204 is coupled to, the center of the rotary link is a bearing hub fixed metal 301 is coupled, the fixed hub center is fixed to the eccentric shaft 401 formed on the eccentric cam 400, eccentric A reciprocating four-cycle two-stage compressor characterized in that the center of the axial eccentric cam is tapered and assembled with the electric motor shaft (102a) of the BLDC electric motor. According to claim 1, The gas sucked through the gas suction pipe 104 of the compression body case 100 is branched into each suction valve 208a of the second cylinder (B) and the third cylinder (C), The first pressurized gas in the second cylinder (B) is sucked into the intake valve (208a) of the fourth cylinder (D) through the discharge valve (208b) of the second cylinder (B), and the second pressurized gas is the fourth cylinder. The gas is piped to the gas discharge pipe 105 through the discharge valve 208b of (D), and the first pressurized gas in the third cylinder (C) passes through the discharge valve of the third cylinder (C). The gas intaken through the suction valve 208a of A) and pressurized secondary is discharged through the discharge valve 208b of the first cylinder A, and the discharge valve 208b of the fourth cylinder D is piped. A reciprocating four-cycle two-stage compressor characterized in that the pipe is piped to the gas discharge pipe 105.

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