CN1278039C

CN1278039C - Reciprocating compressor

Info

Publication number: CN1278039C
Application number: CNB031025145A
Authority: CN
Inventors: 金炳稷; 金炯锡; 金烔汉; 朴真成
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2002-09-05
Filing date: 2003-02-09
Publication date: 2006-10-04
Anticipated expiration: 2023-02-09
Also published as: KR20040022320A; JP2004100685A; DE10302065B4; CN1480649A; DE10302065A1; BR0300264A; BR0300264B1; US20040047751A1; KR100486575B1

Abstract

A reciprocating compressor includes a piston which reciprocates in a cylinder; a suction valve mounted at an end surface of the piston; a discharging valve assembly that compresses and discharges gas taken into a compression space; and a suction valve fixing member engaged to a frontal surface of the piston to movably receive the suction valve.

Description

Reciprocal compressor

Technical field

The present invention relates to a kind of reciprocal compressor, relate in particular to a kind of by improving the reciprocal compressor that improves compressor performance in order to the structure of the bleeder valve controlling air-breathing suction valve and discharge in order to control gaseous.

Background technique

Usually, compressor is a kind of cooled gas of introducing from vaporizer in low-temp low-pressure state lower compression and by gaseous state being become the equipment that High Temperature High Pressure discharges gas.

According to the method for compressed fluid, compressor can be divided into rotary compressor, reciprocal compressor and scroll compressor.

Particularly, reciprocal compressor sucks when the piston linear motion and compressed fluid, and such reciprocal compressor can be divided into following method of work: compressor changes rotatablely moving of drive motor the linear reciprocating motion of piston into and compressed fluid; And when drive motor was carried out linear reciprocating motion, piston was carried out to-and-fro motion, and compressor compresses thus and sucks fluid.

Fig. 1 is the sectional view that conventional reciprocating formula compressor is shown, Fig. 2 is the partial sectional view that the working state of suction valve and bleeder valve when carrying out suction operation among Fig. 1 is shown, and Fig. 3 is the phantom that the working state of suction valve and bleeder valve when carrying out bleeding among Fig. 1 is shown.

As shown in drawings, conventional reciprocating formula compressor comprises: the shell 10 with sucking pipe SP and outlet pipe DP; Flexibly be installed in the frame unit 20 in the shell 10; Reciprocable machine 30, it is fixed on the frame unit 20 and produces driving force; Compression unit 40, its linear reciprocation force by reciprocable machine 30 suck, compress and discharge gas; And, resonant spring unit 50, it causes resonance motion by yielding support compression unit 40 on moving direction.

Reciprocable machine 30 comprises: be installed in the external stator 31 between middle frame 22 and the afterframe 23; The inner stator 32 that links to each other and insert afterframe 23 and be attached thereto with external stator 31 with predetermined interval; And be installed between external stator 31 and the inner stator 32 to carry out the movable piece 33 of linear reciprocating motion.

Compression unit 40 comprises: be integrally formed in the cylinder 41 in the front baffle 21; Link to each other so that in the compression volume P1 of cylinder 41, carry out pistons reciprocating 42 with the movable piece 33 of reciprocable machine 30; Be installed in the front end of piston 42 so that control air-breathing suction valve 43 by the suction path F that opens and closes piston 42; And, bleeder valve assembly 70, it is installed in the release side of cylinder 41, in order to control the release of pressurized gas by opening and closing compression volume P1.

Bleeder valve assembly 70 comprises: in order to the release lid 71 of the side that covers cylinder 41 once more; Insert to discharge cover in 71, in order to the bleeder valve 72 of the compression volume P1 of opening and closing cylinder 41; And, be installed in to discharge and cover 71 inside, valve spring 73 in order to flexibly to support bleeder valve 72.

At pressure support face 72a place, promptly place, the rear surface of bleeder valve 72 forms insertion groove 72b, and fixedly the head of the bolt of suction valve 43 stretches out.Correspondingly, the head of bolt can be inserted into insertion groove 72b when propellant compresses.

The working procedure of the conventional reciprocating formula compressor with said structure will be described below.

Thereby when producing magnetic flux for reciprocable machine 30 energisings between external stator 31 and inner stator 32, the movable piece 33 of reciprocable machine 30 is subjected to the effect of resonant spring unit 50 to carry out the elasticity reciprocatory motion.

At this moment, along with piston 42 is carried out to-and-fro motion in cylinder 41, the stereomutation of compression volume P1, gas is inhaled into and compresses.

Because the pressure of gas is higher than predetermined pressure, when this pressure became elastic force greater than valve spring 73, bleeder valve 72 was moved.The sequential process that is released to compression volume P2 along with pressurized gas is repeated to carry out, and cover 71 interior outlet pipe DP and is released to the outside through being formed on to discharge by opening and closing gas that bleeder valve 72 discharges.

After this, 2 and 3 explain air-breathing, compression and releasing course with reference to the accompanying drawings.

As shown in Figure 2, when piston 42 moves to lower dead centre (a), the bleeder valve of bleeder valve assembly 70 72 contacts with the end of cylinder 41 because of pressure reduction, thus closes compression space P1.

Simultaneously and the suction valve 43 that cooperates of piston 42 be bent and open and suck path F, like this, cooled gas is inhaled into the compression volume P1 of cylinder 41 through the suction path F of piston 42.

As shown in Figure 3, piston 42 arrives when after bottom dead center moving to upper dead center (b), and suction valve 43 turns back to original state, and sucks path F and be closed, thereby compression sucks cooled gas in the compression volume P1 of cylinder 41.

Because gas pressure is higher than scheduled pressure value, when it becomes when being higher than the elastic force of valve spring 73, the bleeder valve 72 of releasing unit 70 is opened, thereby discharges the cooled gas that has compressed.

But in traditional compressor, the bleeder valve 72 that is supported by valve spring 73 can not carry out horizontal motion and the state motion to tilt in gas compression processes.

This is because valve spring 73 is difficult in horizontal position is arranged in the structure.

Foregoing, when bleeder valve 72 moved under heeling condition rather than under the level, the head of bolt B (especially seamed edge) did not insert insertion groove 72b, but contacted or pressurized with neighbouring part, thereby had destroyed bleeder valve and increased compression volume.Correspondingly, produce the dead band, thereby reduced compression performance.

In addition, in traditional compressor owing to suck the core that the path is not formed on piston, during gas release with disequilibrium.

Summary of the invention

So, an object of the present invention is to provide a kind of reciprocal compressor, it improves compression performance by the structure of improving in order to the bleeder valve controlling air-breathing suction valve and discharge in order to control gaseous.

For advantage and the corresponding target of the present invention that reaches these and other, routine as shown here and broad description, a kind of compressor is provided, has comprised: to-and-fro motion and its inside have the piston in air-breathing path in cylinder under the driving force effect of reciprocable machine; Be installed in the piston end face place, pass through the suction valve of the suction gas flow that sucks the path in order to control; Valve assembly, it has the release lid that the side with cylinder matches, and the valve spring of bleeder valve is flexibly supported so that the bleeder valve of the gas release in the compression volume that control is formed by piston and cylinder in the end that is installed in cylinder; And, the suction valve fixed block, it matches with the front surface of piston, and in order to receiving suction valve before and after movably, the suction valve fixed block comprises the cylinder that cooperates with piston and from the end face bending of body, in order to the stopping part of the motion of restriction suction valve.

The excircle of suction valve is provided with supporting surface, and the suction face that gas is passed through is formed between the supporting surface.

The suction valve fixed block is provided with at the center of its front surface and sucks the through hole that the path links to each other.

Be provided with at the center of the rear surface of bleeder valve to the crowning of through hole correspondence.

For advantage and the corresponding target of the present invention that reaches these and other, routine as shown here and broad description, a kind of compressor is provided, has comprised: to-and-fro motion and its inside have the piston in air-breathing path in cylinder under the driving force effect of reciprocable machine; Be installed in the piston end face place and suck gas through sucking the suction valve that flows in path in order to control; Valve assembly, it has the release lid that the side with cylinder matches, and the valve spring of bleeder valve is flexibly supported so that the bleeder valve of the gas release in the compression volume that control is formed by piston and cylinder in the end that is installed in cylinder; In order to suction valve is fixed to the conical head rivet on the piston; And be formed on the rear surface place of bleeder valve, in order to insert the insertion groove of this conical head rivet.

By below in conjunction with the accompanying drawing detailed description of the invention, aforesaid and other purpose, feature and advantage will become more clear.

Description of drawings

To add accompanying drawing and be in order to provide, and accompanying drawing constituted the part of specification further understanding of the present invention, in order to the explanation embodiments of the invention and and explanation explain principle of the present invention together, in the accompanying drawing:

Fig. 1 is the sectional view of conventional reciprocating formula compressor;

Fig. 2 is the partial sectional view that the working state of bleeder valve assembly when carrying out suction operation among Fig. 1 is shown;

Fig. 3 is the partial sectional view that the working state of bleeder valve assembly when carrying out bleeding among Fig. 1 is shown;

Fig. 4 is the longitudinal section that reciprocal compressor according to a preferred embodiment of the present invention is shown;

Fig. 5 is the partial sectional view that the working state of bleeder valve assembly when carrying out suction operation among Fig. 4 is shown;

Fig. 6 is the partial sectional view that the working state of bleeder valve assembly when carrying out bleeding among Fig. 4 is shown;

Fig. 7 is the perspective exploded view that the cooperation of suction valve and piston is shown;

Fig. 8 is the perspective exploded view that another cooperation of suction valve and piston is shown;

Fig. 9 is the front view that the suction valve fixed block of Fig. 4 is shown; And

Figure 10 and Figure 11 show the part of reciprocal compressor according to a further advantageous embodiment of the invention, wherein

Figure 10 is the longitudinal section that the working state of bleeder valve when carrying out suction operation is shown;

Figure 11 is the longitudinal section that the working state of bleeder valve when carrying out bleeding is shown.

Embodiment

Referring now to accompanying drawing embodiments of the invention are elaborated.

With reference to description of drawings reciprocal compressor of the present invention.

Fig. 4 is the longitudinal section that reciprocal compressor according to a preferred embodiment of the present invention is shown, Fig. 5 is the partial sectional view that the working state of bleeder valve when carrying out bleeding among Fig. 4 is shown, Fig. 6 is the partial sectional view that the working state of bleeder valve when carrying out bleeding among Fig. 4 is shown, Fig. 7 is the view sub-anatomy that the cooperation of suction valve and piston is shown, Fig. 8 is the view sub-anatomy that another cooperation of suction valve and piston is shown, and Fig. 9 is the front view that the suction valve fixed block among Fig. 4 is shown.

As shown in the figure, reciprocal compressor according to a preferred embodiment of the present invention comprises: the shell 10 with gaseous state suction pipe SP and outlet pipe DP; Be installed in the frame unit 20 in the shell 10; Reciprocable machine 30 with movable piece of linear motion; The to-and-fro motion in cylinder 141 by linking to each other with movable piece, and within it portion have the piston 142 of air-breathing path F; Be installed in the end of piston 142, in order to the suction valve 143 of the suction gas flow of control through sucking path F; The valve assembly 170 of release in order to the control pressurized gas; And and the front surface of piston 142 cooperate so that front and back receive the suction valve fixed block 144 of suction valve 143.

Bleeder valve assembly 170 comprises: have predetermined space and cover the release lid 171 of a side of cylinder 141; Insert to discharge cover 171 inside, in order to the bleeder valve 172 of the compression volume P1 of opening and closing cylinder 141; And, flexibly be bearing in discharge cover on 171 the inboard and and bleeder valve 172 match so that in the position of setting bleeder valve 172, flexibly support bleeder valve 172.

In a described preferred embodiment of the present invention, suction valve fixed block 144 cooperates with the front surface of certain interval and piston 142, thereby admit suction valve 143 movably, the attachment hole H that links to each other with suction path F is formed on the center of the front surface of suction valve fixed block 144.Anti-dead band face 172a is in the center projection corresponding to the rear surface of the bleeder valve 172 of attachment hole H.

More specifically, columniform suction valve fixed block 144 comprises: and the cylinder 144b of piston 142 cooperations; And stopping part 144a, it is from the end surface bending of body 144b, in order to the motion of restriction suction valve 143.

As shown in Figure 7, when suction valve fixed block 144 and piston 142 cooperates, this suction valve fixed block 144 can with the front side press fit of piston 142.

In addition, as shown in Figure 8, can with the internal thread S2 that is formed on the inner peripheral surface place of suction valve fixed block 144 suction valve fixed block 144 and piston 142 be combined together by being formed on piston 142 preceding outside thread S1.

This suction valve forms lamellar, and can comprise any the suction of gas and in the squeeze operation time smooth successfully the operation element.

Suction valve 143 is opened when air-breathing and is sucked path F, and closes suction path F when gas compression.This suction valve 143 is included in the supporting surface 143b of excircle and is formed on the suction surface 143a in order to allow gas pass through between the supporting surface 143b.

That is, supporting surface 143b is inhaled into the stopping part 144a stop of valve fixed block 144, and, suck surperficial 143a opens the suction path F of piston 142 and close suction valve 143 when gas compression is operated when sucking gas-operated attachment hole H.

Hereinafter will explain work effect according to the reciprocal compressor of a described preferred embodiment of the present invention.

When moving to lower dead centre (a) under the driving force effect of piston 142 at reciprocable machine 30, be inhaled into the gas that sucks path F and utilize inferior difference to promote suction valve 143.

At this moment, the suction valve 143 that is installed in the inside of suction valve fixed block 144 moves backward and opens and sucks path F.Simultaneously, pass the gas that sucks path F and pass the suction face 143a of suction valve 143, thereby pass attachment hole H, and thereby be introduced into compression volume P1.

When finish suck operation after, piston 142 is under the driving force effect of reciprocable machine 30 and travel forward.At this moment, suction valve 143 returns the also suction path 142 of closure piston 142 because of pressure reduction.

The pressure that arrives upper dead centers (b) and gas along with piston 142 is higher than scheduled pressure value, and when it became elastic force greater than valve spring 173, bleeder valve 72 was moved, gas is released.

In addition, when the pressurized gas of compression volume P1 to Free up Memory P2 motion and thereby when making the pressure of compression volume P1 become less than predetermined pressure, bleeder valve 172 utilizes the elastic force of valve spring 173 to turn back to original state, and gas is inhaled into and the sequential process that compresses is repeated to carry out.

In the first embodiment of the present invention, even bleeder valve 172 moves with heeling condition, the anti-dead band face 172a of bleeder valve 172 still is inserted into the attachment hole H of suction valve fixed block 144, thereby has prevented the contact and the collision of structural element, and makes the dead band minimum.

At this moment, owing to be formed with suction path F in the center of piston 142, gas is discharged equably, thereby can not cause the imbalance of quality.

Figure 10 and 11 shows the part of reciprocal compressor according to another embodiment of the invention, wherein, Figure 10 is the longitudinal section that the working state of bleeder valve assembly when carrying out suction operation is shown, and Figure 11 is the longitudinal section that the working state of bleeder valve assembly when carrying out the gas compression operation is shown.

As shown in the figure, in another embodiment of the present invention, provide a kind of reciprocal compressor, it comprises: the shell 10 with sucking pipe SP and outlet pipe DP; Be installed in the frame unit 20 in the shell 10; Reciprocable machine 30 with movable piece of linear motion; The to-and-fro motion in cylinder 141 by linking to each other with movable piece, and within it portion have the piston 142 of air-breathing path F; Be installed in the end of piston 142, in order to the suction valve 143 of the suction gas flow of control through sucking path F; The valve assembly 170 of release in order to the control pressurized gas; In order to suction valve 143 is fixed to the conical head rivet R on the piston 142; And, be formed on the rear surface place of bleeder valve 172, in order to insert the insertion groove 172b of conical head rivet R.

Bleeder valve assembly 170 comprises: have predetermined space and in order to the release lid 171 of the side that covers cylinder 141; Insert to discharge cover 171 inside, in order to the bleeder valve 172 of the compression volume P1 of opening and closing cylinder 141; Valve spring 173, its be supported on discharge cover 171 inboard and and bleeder valve 172 match, in order in the position of setting bleeder valve 172, flexibly to support bleeder valve 172.

When gas is compressed, form insertion groove 272b at the place, rear surface of bleeder valve 272, so that insert conical head rivet R.

In another embodiment of the present invention, when moving to lower dead centre (a) under the driving force effect of piston 142 at reciprocable machine 30, the gas that sucks path F utilizes pressure reduction to promote suction valve 143.

At this moment, the suction valve 143 that is installed in the space place of suction valve fixed block 144 move backward, and thereby opens suction path F.Simultaneously, pass the gas that sucks path F and be introduced into compression volume P1.

When finishing suction operation, piston 142 travels forward under the driving force effect of reciprocable machine 30.Simultaneously, suction valve 143 returns the also suction path F of closure piston 142 because of pressure reduction.

The pressure that arrives upper dead centers (b) and gas along with piston 142 is higher than predetermined pressure, and when it becomes when being higher than the elastic force of valve spring 173, bleeder valve 72 is moved, gas is released.

In another described embodiment according to the present invention, even bleeder valve 272 state motion to tilt when gas compression, conical head rivet R still can be inserted into insertion groove 272b.

Correspondingly, because conical head rivet R not have to contact or collide with the rear surface of bleeder valve 272, can prevent from that element is damaged also can make the dead band minimum, thereby improve compression performance.

As previously mentioned, in the present invention, can in the squeeze operation of gas, prevent because and the damage of the structural element that caused of bleeder valve collision and make the dead band minimum, thereby improve the compression performance of compressor.

In addition, owing to suck the core that the path is formed on piston, gas is evenly discharged, thereby can not cause the imbalance of quality.

Because the present invention can embody under the prerequisite that does not deviate from its spirit and inner characteristic and express in a variety of forms, so should be understood that, unless otherwise indicated, before not being subjected to, the foregoing description states the restriction of any details of name, and should in its spirit and scope that the attached claims in back limits, do to understand widely, so, every at claims and equivalent thereof requirement and the institute in the scope change and be out of shape all should be included by accompanying claims.

Claims

1. reciprocal compressor comprises:

Piston, its to-and-fro motion in cylinder under the driving force effect of reciprocable machine, and portion has air-breathing path within it;

Suction valve, it is installed in the piston end face place, in order to the gas flow of control through the suction of suction path;

Valve assembly, it has: and the release lid that matches of a side of cylinder, the bleeder valve of the gas release of the compression volume that be installed in place, cylinder end, forms in order to control by cylinder and piston, and in order to flexibly to support the valve spring of bleeder valve; And

The suction valve fixed block, the front surface of itself and piston matches, and admits suction valve before and after movably, and the suction valve fixed block comprises the cylinder that cooperates with piston and from the end face bending of body, in order to the stopping part of the motion of restriction suction valve.

2. compressor according to claim 1, wherein, suction valve is opened when sucking gas and is sucked the path, closes when pressurized gas and sucks the path.

3. compressor according to claim 1, wherein, suction valve is provided with supporting surface at its excircle place, and with so that the suction face that gas passes through be formed between the supporting surface.

4. compressor according to claim 1, wherein, the suction valve fixed block is provided with the through hole that sucks the path in the center of its front surface.

5. compressor according to claim 1, wherein, the suction valve fixed block has columniform shape.

6. compressor according to claim 1, wherein, the suction valve fixed block is in the press fit of the front side of piston.

7. compressor according to claim 1 wherein, forms internal thread at the inner peripheral surface place of suction valve fixed block, forms outside thread before piston.