CN206000728U - Compressor list twin-tub switching device and positive displacement compressor - Google Patents

Abstract

The utility model is related to a kind of compressor list twin-tub switching device and positive displacement compressor, wherein, compressor list twin-tub switching device includes the first cylinder and the second cylinder, the second slide plate is provided with second cylinder, second slide plate is provided with breach, second slide plate side is provided with lock piece, lock piece is moved back and forth in slide opening, lock piece stretches out slide opening insertion breach, the second slide plate can be limited, so that the first cylinder is worked independently, lock piece retraction slide opening, the second slide plate can be avoided, and the first cylinder and the second cylinder is made while work；Second slide plate is divided at least two regions by breach, the first end of slide opening is near the second slide plate, second end of slide opening is away from the second slide plate, the aperture of the first end of slide opening is less than the size of the Minimum Area of the second slide plate, second slide plate can avoid the Minimum Area of the second slide plate from falling into slide opening in reciprocatory movement in the second cylinder.The utility model can reduce the abrasion of the second slide plate and miscellaneous part, reduce the power loss of compressor.

Description

Compressor list twin-tub switching device and positive displacement compressor

Technical field

The utility model is related to Compressor Technology field, more particularly to a kind of compressor list twin-tub switching device and transfiguration pressure Contracting machine.

Background technology

For meeting that user is efficient to air-conditioning products, energy-conservation, comfortable requirement, air-conditioning system adopts positive displacement compressor, transfiguration Compressor includes double-cylinder variable-capacity compressor again, when operation of air conditioner load is larger, using twin-tub operational mode, when operation of air conditioner is negative Lotus relatively hour, using single cylinder operational mode.

As shown in figure 1, double-cylinder variable-capacity compressor of the prior art includes the first cylinder and the second cylinder 1 ', the first cylinder Dividing plate 2 ' is provided between the second cylinder 1 ', slide plate 3 ' in the second cylinder 1 ', is provided with, in the flange 4 ' below slide plate 3 ', be provided with cunning Hole, is provided with lock piece 5 ' and spring 6 ' in slide opening, the bottom of slide plate 3 ' is provided with breach, by changing lock piece head and lock piece The pressure reduction of afterbody, can make lock piece 5 ' move upwards and stretch into the breach pinning slide plate 3 ' of slide plate 3 ', and the second cylinder 1 ' is not produced Compression, compressor are single cylinder operational mode, it is also possible to move downward lock piece 5 ' and retract from the breach of slide plate 3 ', away from avoidance Slide plate 3 ', slide plate 3 ' are contacted with roller 7 ', and the second cylinder 1 ' recovers normal work, and compressor is twin-tub operational mode, is come with this Realize single twin-tub handoff functionality.

In the above prior art, positive displacement compressor changes lock piece head and lock by controlling compressor exterior line The pressure reduction of stop member afterbody realizes constraint and constraint relief to slide plate 3 ' controlling the motion of lock piece 5 '.Lock piece 5 ' is being slided In the hole is slided, and as the aperture of slide opening is excessive, the constraint length to slide plate 3 ' is shorter, and slide plate 3 ' makees reciprocating linear against roller 7 ' Easily incline during motion (as shown in Figure 1), slide plate 3 ' has the risk for falling into slide opening away from the part of roller 7 ', easily causes slide plate 3 ' With the brinelling of flange 4 ', and slide plate 3 ' and roller 7 ', the abrasion of dividing plate 2 ', compressor power consumption loss are increased；While footpath Coolant leakage circulation passage is increased to size slide opening bigger than normal, reduce compressor refrigerating capacity.

Utility model content

The purpose of this utility model is to propose a kind of compressor list twin-tub switching device and positive displacement compressor, and which can avoid Slide plate falls into slide opening, reduces abrasion, reduces power consumption penalty.

For achieving the above object, the utility model provides a kind of compressor list twin-tub switching device, and which includes the first gas Cylinder and the second cylinder, are provided with the second slide plate in second cylinder, second slide plate is provided with breach, the second slide plate side Lock piece is provided with, the lock piece is moved back and forth in slide opening, the lock piece stretches out the slide opening and the breach is inserted, can Second slide plate is limited, so that first cylinder is worked independently, the lock piece is retracted the slide opening, described the can be avoided Two slide plates, make first cylinder and second cylinder while work；

Second slide plate is divided at least two regions by the breach, and the first end of the slide opening is slided near described second Piece, away from second slide plate, the aperture of the first end of the slide opening is less than second slide plate at the second end of the slide opening The size of Minimum Area, second slide plate can avoid the described second cunning in reciprocatory movement in second cylinder The Minimum Area of piece falls into the slide opening.

One preferably or in alternative embodiment, the aperture at the second end of the slide opening is more than the hole of the first end of the slide opening Footpath.

One preferably or in alternative embodiment, the slide opening is shoulder hole, and which includes the first hole and the second hole, the locking Part stretches out first hole to limit second slide plate, and the aperture in first hole is less than the Minimum Area of second slide plate Size, the aperture in second hole is more than the aperture in first hole.

One preferably or in alternative embodiment, the lock piece is stepped, and which includes first paragraph and second segment, and described the Less than the aperture in first hole, the radial dimension of the second segment is more than the aperture in first hole to one section of radial dimension, Aperture less than second hole.

One preferably or in alternative embodiment, the lock piece includes the 3rd section, and described 3rd section is located at the first paragraph Between the second segment, described 3rd section of radial dimension is less than the second segment more than the radial dimension of the first paragraph Radial dimension, described 3rd section of radial dimension are more than the aperture in first hole, and described 3rd section located at the second hole hinge Hole region not in place.

One preferably or in alternative embodiment, the slide opening includes the 3rd hole, the 3rd hole position in first hole with Between second hole, the aperture in the 3rd hole more than the aperture in first hole and the aperture in second hole, described the Three hole positions are in second hole fraising region not in place.

Cooperation one preferably or in alternative embodiment, between the second hole of the slide opening and the second segment of the lock piece Gap is less than 0.05mm, more than 0.005mm.

One preferably or in alternative embodiment, the second slide plate chamber that the first end of the slide opening is located with second slide plate Connection, the second slide plate chamber connect the first control mouth, and the second end of the slide opening is connected with second control mouth, by institute Stating the first control mouth controls the lock piece to move back and forth in the slide opening with the pressure reduction of second control mouth.

Preferably or in alternative embodiment, spring cavity is provided with the lock piece, is provided with spring, institute in the spring cavity one State spring cavity to connect with second control mouth；First control mouth is high pressure, when second control mouth is low pressure, described Lock piece can be retracted the slide opening, avoid second slide plate, and first control mouth and second control mouth are low During pressure, the lock piece can stretch out the slide opening under the effect of the restoring force of the spring, limit second slide plate.

One preferably or in alternative embodiment, second control mouth is the air entry of second cylinder.

One preferably or in alternative embodiment, the lock piece is pin or bearing pin.

For achieving the above object, the utility model additionally provides a kind of positive displacement compressor, and which includes any of the above-described embodiment In compressor list twin-tub switching device.

One preferably or in alternative embodiment, including housing and bent axle, the bent axle in the housing is vertically successively It is provided with the first cylinder, dividing plate, the second cylinder and second flange；The first slide plate chamber and the first roller is provided with first cylinder, The first slide plate is provided with the first slide plate chamber, is provided with the second roller in second cylinder, described in the bent axle drive connection First roller and second roller, first roller and second roller are rotated, and corresponding can promote described first Slide plate and second slide plate are moved back and forth.

One preferably or in alternative embodiment, the slide opening is located at the second flange, first connected with the slide opening Control mouth is located at second cylinder, and the second control mouth connected with the slide opening is the air entry of second cylinder.

One preferably or in alternative embodiment, the air entry of the air entry of the positive displacement compressor and first cylinder and The air entry connection of second cylinder, the air entry of the positive displacement compressor are sequentially communicated evaporimeter, throttling unit by pipeline The exhaust outlet of part, condenser and the positive displacement compressor；Pipe between the exhaust outlet of the positive displacement compressor and the condenser Road is connected with tie point, and the tie point is provided with the first magnetic valve, the air entry of the positive displacement compressor and the evaporation Pipeline between device is connected with the second branch road, and second branch road is provided with the second magnetic valve, the tie point and described Two branch roads all connect first control mouth.

Based on technique scheme, the utility model at least has the advantages that：

The utility model provide slide opening first end near the second slide plate, the second end of slide opening away from the second slide plate, and The aperture of the first end of slide opening was moved back and forth in the second cylinder less than the size of the Minimum Area of the second slide plate, the second slide plate Cheng Zhong, can avoid the Minimum Area of the second slide plate from falling into slide opening, therefore, it is possible to reduce the mill of the second slide plate and miscellaneous part Damage, reduce the power loss of compressor；Meanwhile, the aperture of slide opening is less, and the circulation passage less than normal that slide opening is formed can subtract Few leakage rate of the refrigerant from the high-pressure side of lock piece to low-pressure side, improves the refrigerating capacity of compressor.

Description of the drawings

Accompanying drawing described herein is used for providing further understanding to of the present utility model, constitutes the part of the application, Schematic description and description of the present utility model is used for explaining the utility model, does not constitute to of the present utility model improper Limit.In the accompanying drawings：

Fig. 1 is that the slide plate of compressor list twin-tub switching construction in prior art inclines schematic diagram；

The structural representation of the compressor list twin-tub switching device that Fig. 2 is provided for the utility model；

Fig. 3 is the enlarged diagram of a-quadrant shown in Fig. 2；

The structural representation of the first embodiment of the lock piece that Fig. 4 is provided for the utility model；

The structural representation of the second embodiment of the lock piece that Fig. 5 is provided for the utility model；

The second embodiment of the lock piece that Fig. 6 is provided for the utility model is located at the schematic diagram of slide opening；

Fig. 7 is the enlarged diagram in B region shown in Fig. 6；

The structural representation of the preferred embodiment of the slide opening that Fig. 8 is provided for the utility model；

The transfiguration schematic diagram of the compressor list twin-tub switching device that Fig. 9 is provided for the utility model；

The schematic cross-section of the positive displacement compressor that Figure 10 is provided for the utility model.

Label in accompanying drawing：

1 '-the second cylinder；2 '-dividing plate；3 '-slide plate；4 '-flange；5 '-lock piece；6 '-spring；7 '-roller；

The first cylinder of 1-；The second cylinder of 2-；The second slide plate of 3- chamber；

The second slide plate of 4-；41- breach；

5- lock piece；51- first paragraph；52- second segment；The 3rd section of 53-；

6- slide opening；The first hole of 61-；The second hole of 62-；The 3rd hole of 63-；

The first control mouth of 7-；8- spring；The air entry of the second cylinder of 9-；10- bent axle；11- first flange；12- dividing plate； 13- second flange；The first slide plate of 14-；The first roller of 15-；The second roller of 16-；17- cover plate；18- low-pressure channel；The first gas of 19- The air entry of cylinder；20- housing；The air entry of 21- positive displacement compressor；The exhaust outlet of 22- positive displacement compressor；23- evaporimeter；24- Restricting element；25- condenser；The first magnetic valve of 26-；The second magnetic valve of 27-；

The theoretical fraising region in the second hole of a-；The actual fraising region in the second hole of b-.

Specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in embodiment is carried out clear, complete Ground description.Obviously, described embodiment is only a part of embodiment of the present utility model, rather than whole embodiments. Based on embodiment of the present utility model, the institute obtained under the premise of creative work is not made by those of ordinary skill in the art There is other embodiment, belong to the scope of the utility model protection.

Of the present utility model description in, it is to be understood that term " " center ", " longitudinal direction ", " horizontal ", "front", "rear", The orientation of instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " or position relationship be based on accompanying drawing institute The orientation for showing or position relationship, are for only for ease of description the utility model and simplify description, rather than indicate or hint indication Device or element must be with specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this practicality The restriction of novel protected scope.

In prior art there is integrity problem in huge discharge positive displacement compressor, and the eccentric part offset of bent axle transfiguration cylinder is relatively When big, slide plate stroke is long, and when twin-tub runs, lock piece avoids slide plate under the differential pressure action of head high pressure and aft low pressure, sliding Piece is done reciprocating linear motion against roller, if slide opening is excessive, the constraint length to slide plate is shorter, and slide plate is easily inclined and falls into slide opening Active force between (as shown in Figure 1), slide plate and flange, dividing plate and roller is uneven, causes abrasion aggravation, and compressor horsepower disappears Consumption increases.

The compressor list twin-tub switching device that the utility model is provided can avoid slide plate from inclining and fall into slide opening, reduce slide plate With the abrasion of flange, dividing plate and roller, reduce compressor horsepower loss.

As shown in Figure 2 and Figure 3, be the utility model provide compressor list twin-tub switching device illustrative examples, In the illustrative examples, compressor list twin-tub switching device includes the first cylinder 1 and the second cylinder 2, is provided with the second cylinder 2 Second slide plate chamber 3, is provided with the second slide plate 4 in the second slide plate chamber 3, and the second slide plate 4 is provided with breach 41, and 4 side of the second slide plate is provided with Lock piece 5, can make lock piece 5 move back and forth in slide opening 6 by the pressure reduction at control 5 two ends of lock piece, and lock piece 5 stretches out Slide opening 6 inserts breach 41, can limit the second slide plate 4, so that the first cylinder 1 is worked independently, realize single cylinder operational mode；Lock piece 5 retraction slide openings 6, can avoid the second slide plate 4, make the first cylinder 1 and the second cylinder 2 while work, realizes twin-tub operational mode.

Second slide plate 4 is divided at least two regions by breach 41, the first end of slide opening 6 near the second slide plate 4, slide opening 6 Away from the second slide plate 4, the aperture of the first end of slide opening 6 is less than the size of the Minimum Area of the second slide plate 4, the second slide plate at the second end 4 in reciprocatory movement in the second cylinder 2, the Minimum Area of the second slide plate 4 can be avoided to fall into slide opening 6, therefore, it is possible to subtract Few second slide plate 4 and the abrasion of miscellaneous part (flange, dividing plate and roller), reduce the power loss of compressor；Meanwhile, slide opening 6 aperture is less, and the circulation passage less than normal that slide opening 6 is formed can reduce refrigerant from 5 head high-pressure side of lock piece (near second The side of slide plate 4) to low-pressure side (away from the side of the second slide plate 4) leakage rate, improve compressor refrigerating capacity.

In above-described embodiment, near the second slide plate 4, the second end of slide opening 6 is away from the second slide plate 4, sliding for the first end of slide opening 6 The aperture at second end in hole 6 can be less than normal more than the aperture of the first end of slide opening 6, the aperture of the first end of slide opening 6, slides to second The constraint length of piece 4 is long, the Minimum Area of the second slide plate 4 can be avoided to fall into slide opening 6, reduce abrasion, reduce power attenuation.

One preferably or in alternative embodiment, slide opening 6 can be to include degree of lip-rounding structure, i.e. the aperture of the first end of slide opening 6 is arrived The aperture at the second end of slide opening 6 is gradually increased.

As shown in figure 3, one preferably or in alternative embodiment, slide opening 6 can be shoulder hole, which includes the first hole 61 and the Two holes 62, the first hole 61 near the second slide plate 4, the second hole 62 away from the second slide plate 4, lock piece 5 can stretch out the first hole 61 with The second slide plate 4 is limited, lock piece 5 can retract the first hole 61 so that the second slide plate 4 is avoided, and the aperture in the first hole 61 is slided less than second The size of the Minimum Area of piece 4, the aperture in the second hole 62 are more than the aperture in the first hole 61.

As slide opening 6 is shoulder hole, and the aperture in the first hole 61 is less than normal, and the constraint length to the second slide plate 4 is long, and second slides Piece 4 is difficult inclination and drops in slide opening 6, reduce second under the drive of roller in 3 reciprocatory movement of the second slide plate chamber Slide plate 4 and the abrasion of flange, dividing plate and roller, reduce the power loss of compressor；Meanwhile, the stream less than normal that slide opening 6 is formed Circulation passage can reduce refrigerant from 5 head high-pressure side of lock piece (lock piece 5 is located at the one end in the first hole 61) to low-pressure side (locking Part 5 be located at the second hole 62 one end) leakage rate, improve compressor refrigerating capacity.

As shown in figure 4, stretching out the length of slide opening 6 and ensureing that 5 two ends of lock piece form stable pressure to limit lock piece 5 Difference, lock piece 5 can arrange stepped, and lock piece 5 can include first paragraph 51 and second segment 52, the radial ruler of first paragraph 51 The very little aperture for being less than the first hole 61, the radial dimension of second segment 52 are more than the aperture in the first hole 61, and the hole less than the second hole 62 Footpath；In reciprocatory movement in slide opening 6, first paragraph 51 can stretch out retraction from the first hole 61 to lock piece 5.Further, it is Guarantee lock piece 5 can stretch out the first hole 61, insert the breach 41 arranged on second slide plate 4, and the length of first paragraph 51 is more than The depth in the first hole 61.

It should be noted that：Slide opening 6 is elongate aperture, radially refers to the radial direction of slide opening 6.

As slide opening 6 is shoulder hole, in process, the probability of tool nose abrasion is big, after abrasion, tool nose size Can reduce, when processing shoulder hole, the part aperture in the second hole 62 of tool nose processing can be less than normal, that is, there is fraising not in place Problem, while general tool nose itself have chamfering, can also ream not in place.

In order to solve the above problems, as shown in figure 5, lock piece 5 can include the 3rd section 53, the 3rd section 53 is located at first paragraph Between 51 and second segment 52, the 3rd section 53 of radial dimension is more than the aperture in the first hole 61, and the 3rd section 53 of radial dimension is more than Less than the radial dimension of second segment 52, the 3rd section 53 is reamed area not in place the radial dimension of first paragraph 51 located at the second hole 62 Domain.

As shown in Figure 6, Figure 7, the lock piece 5 with first paragraph 51, second segment 52 and the 3rd section 53 is located at has the first hole 61 and second hole 62 slide opening 6 in when, according to the second hole 62 of the theoretical fraising region a in the second hole 62 of slide opening 6 and slide opening 6 Actual fraising region b, it can be seen that the second hole 62 of slide opening 6 there may be fraising problem not in place.

It is not in place that the 3rd section 53 of lock piece 5 the second hole 62 located at slide opening 6 there may be fraising by the utility model Region, mutually hits abrasion with the second hole 62 when being avoided that 5 upward sliding of lock piece, ensure that lock piece 5 is free in slide opening 6 Slide, the 3rd section 53 of lock piece 5 plays a part of resigning, compressor horsepower loss reduced, the performance of compressor is improve, While be avoided that lock piece 5 is stuck, 5 upward sliding of lock piece can be also prevented apart from too short and slide plate can not be locked.

Further, the fit clearance between the second hole 62 of slide opening 6 and the second segment 52 of lock piece 5 should be less than 0.05mm, to reduce leakage rate, simultaneously greater than 0.005mm, interior slidably in slide opening 6 to ensure lock piece 5.That is slide The radius in second hole 62 in hole 6 is 0.005mm～0.05mm with the difference range of the difference of the radius of the second segment 52 of lock piece 5.

As shown in figure 8, another preferably or in alternative embodiment, in order to the second hole 62 for solving slide opening 6 ream not in place Problem, the slide opening 6 that the utility model is provided can include the 3rd hole 63, the 3rd hole 63 be located at the first hole 61 and the second hole 62 it Between, more than the aperture in the first hole 61 and the aperture in the second hole 62, the 3rd hole 63 is reamed positioned at the second hole 62 in the aperture in the 3rd hole 63 Region not in place.

It is located at the lock piece 5 having in the first hole 61, the second hole 62 and the 3rd hole 63 and can only has first paragraph 51 and the Two section 52, and be not provided with the 3rd section 53, the part second segment 52 of lock piece 5 located at the 3rd hole 63 of slide opening 6, the 3rd of slide opening 6 the Resigning effect can be played in hole 63.

The compressor list twin-tub switching device that the utility model is provided can be made by the pressure reduction at control 5 two ends of lock piece Lock piece 5 is moved back and forth in slide opening 6.The second slide plate chamber 3 that the first end of slide opening 6 can be located with the second slide plate 4 connects, the Two slide plate chamber 3 connects the first control mouth 7, and the second end of slide opening 6 is connected with the second control mouth, by the first control mouth and 7 second The pressure reduction control lock piece 5 of control mouth is moved back and forth in slide opening 6.

As shown in figure 9, one preferably or in alternative embodiment, spring cavity can be provided with lock piece 5, be provided with spring cavity Spring 8, spring cavity are connected with the second control mouth, and further, the second control mouth can be the air entry 9 of the second cylinder 2.

When the first control mouth 7 is high pressure, and the second control mouth is low pressure, lock piece 5 can be retracted slide opening 6, avoid second Slide plate 4；When the first control mouth 7 and the second control mouth are low pressure, lock piece 5 can be stretched under the effect of the restoring force of spring 8 Go out slide opening 6, the breach 41 on the second slide plate 4 is inserted, limit the second slide plate 4.

In each embodiment above-mentioned, lock piece 5 can be column construction or strip structure etc., for example：It can be pin Or bearing pin etc..

The utility model additionally provides a kind of positive displacement compressor, and which includes the compressor list twin-tub in any of the above-described embodiment Switching device.

As shown in Fig. 2 in above-described embodiment, positive displacement compressor can specifically include housing 20 and bent axle 10, positioned at housing Bent axle 10 in 20 is sequentially provided with first flange 11, the first cylinder 1, dividing plate 12, the second cylinder 2 and second flange 13 vertically； The first slide plate chamber and the first roller 15 are provided with first cylinder 1, the first slide plate 14 is provided with the first slide plate chamber, in the second cylinder 2 The second slide plate chamber 3 and the second roller 16 is provided with, in the second slide plate chamber 3, is provided with the second slide plate 4,10 the first roller of drive connection of bent axle 15 and second roller 16, the first roller 15 and the second roller 16 are rotated, being capable of the first slide plate 14 of corresponding promotion and the second slide plate 4 Move back and forth.

Due to 10 the first roller of drive connection 15 of bent axle, the rotation of bent axle 10 can drive the first roller 15 corresponding first Rotate in cylinder 1, in the case that the first slide plate chamber is in high pressure, the first slide plate 14 can be close to the first roller 15, therefore, the One slide plate 14 can be moved left and right under the promotion of the first roller 15 in the first slide plate chamber.

Due to 10 the second roller of drive connection 16 of bent axle, the rotation of bent axle 10 can drive the second roller 16 corresponding second Rotate in cylinder 2, in the case that the second slide plate chamber 3 is in high pressure, the second slide plate 4 can be close to the second roller 16, therefore, the Two slide plates 4 can be moved left and right under the promotion of the second roller 16 in the second slide plate chamber 3.

One preferably or in alternative embodiment, the second cylinder 2 can be transfiguration cylinder, the first control mouth 7 and the second slide plate chamber 3 It is connected, the second slide plate chamber 3 is connected (as Fig. 3 institute with the head (one end that slide opening 6 is connected with the first control mouth 7) of lock piece 5 Show).Slide opening 6 can be located at second flange 13, and the first control mouth 7 connected with slide opening 6 can be located at the second cylinder 2, with slide opening 6 Second control mouth of connection can be the air entry 9 of the second cylinder 2.I.e. the air entry 9 of the second cylinder 2 and the first control mouth 7 equal Can be located at the side wall (as shown in Figure 9) of the second cylinder 2.

Further, second flange 13 can be provided with cover plate 17, cover plate 17 and second flange away from the side of the second cylinder 2 13 can be provided with low-pressure channel 18, and slide opening 6 can connect the air entry 9 of the second cylinder 2 by low-pressure channel 18.Lock piece 5 Afterbody (one end that slide opening 6 is connected with the air entry 9 of the second cylinder 2) should be less than 0.005mm with the flatness of cover plate 17, to ensure The afterbody of lock piece 5 is fitted tightly with cover plate 17, reduces leakage.

As shown in Figure 10, the control connected mode of the positive displacement compressor that the utility model is provided is：The suction of positive displacement compressor Gas port 21 is connected with the air entry 19 of the first cylinder 1 and the air entry 9 of the second cylinder 2, and the air entry 21 of positive displacement compressor passes through Pipeline is sequentially communicated the exhaust outlet 22 of evaporimeter 23, restricting element 24, condenser 25 and positive displacement compressor；The row of positive displacement compressor Pipeline between gas port 22 and condenser 25 is connected with tie point, and tie point is provided with the first magnetic valve 26, positive displacement compressor Air entry 21 and evaporimeter 23 between pipeline be connected with the second branch road, the second branch road is provided with the second magnetic valve 27, first Branch road all connects the first control mouth 7 with the second branch road.The pressure of the first control mouth 7 adjusts 5 head of lock piece (slide opening 6 and One control mouth 7 connect one end) pressure, 5 afterbody of lock piece (one end that slide opening 6 is connected with the air entry 9 of the second cylinder 2) beginning Connect with the air entry 9 of the second cylinder 2 eventually, be low pressure always.

As shown in Figure 10, when the first magnetic valve 26 is opened, the second magnetic valve 27 cuts out, and compressor high pressure gas enter first Control mouth 7,5 head of lock piece be high pressure, lock piece 5 under the differential pressure action of head high pressure and aft low pressure, slide downward, far From the second slide plate 4 is avoided, the second slide plate 4 is close to the second roller 16 and is done reciprocating linear motion, and compressor is in twin-tub operational mode.

As shown in Figure 10, when the first magnetic valve 26 cuts out, the second magnetic valve 27 is opened, the low pressure gas of compressor air suction mouth side Body enters the first control mouth 7, and 5 head of lock piece is low pressure, and now the afterbody of the head of lock piece 5 and lock piece 5 is in low Pressure, under the effect of 8 elastic force of spring, upward sliding, the head of lock piece 5 stretch into the breach 41 of the second slide plate 4 to lock piece 5, pin Second slide plate 4, the second slide plate 4 do not work, and compressor is in single cylinder operational mode.

The compressor list twin-tub switching device that the positive displacement compressor that the utility model is provided is provided using the utility model, becomes Stair-stepping slide opening 6 is set in the second flange 13 of appearance formula compressor, the integrity problem of huge discharge positive displacement compressor is solved, Aperture near the first hole 61 of 4 side of the second slide plate in the second cylinder 2 is little, and the second slide plate 4 is difficult to incline, and reduces the second slide plate 4 with the abrasion of second flange 13, dividing plate 12 and the second roller 16, reduce the power attenuation of compressor, while can reduce cold The circulation passage of amount leakage, improves the refrigerating capacity of compressor.

The utility model makes 5 selective locking of lock piece or release slide plate by adjusting the pressure at 5 two ends of lock piece, realizes Cylinder idle running is compressed；And 5 afterbody of lock piece is always low pressure, when 5 head of lock piece is high pressure, lock piece 5 unclamps to be slided Piece, twin-tub run；When 5 head of lock piece is low pressure, acted on by 8 power of spring, lock piece 5 pins slide plate, single cylinder runs, switching Convenient.

In description of the present utility model, it is to be understood that limited using the word such as " first ", " second ", " the 3rd " Determine parts, it is only for be easy to above-mentioned parts are distinguished, such as without Stated otherwise, above-mentioned word is not special Implication, therefore it is not intended that restriction to the utility model protection domain.

Finally it should be noted that:Above example is limited only in order to the technical solution of the utility model to be described rather than to which System；Although being described in detail to the utility model with reference to preferred embodiment, those of ordinary skill in the art should Understand：Still specific embodiment of the present utility model can be modified or equivalent is carried out to some technical characteristics and replace Change；Without deviating from the spirit of technical solutions of the utility model, which all should cover the technical scheme being claimed in the utility model In the middle of scope.

Claims (15)

1. a kind of compressor list twin-tub switching device, it is characterised in that：Including the first cylinder (1) and the second cylinder (2), described The second slide plate (4) is provided with two cylinders (2), the second slide plate (4) are provided with breach (41), and the second slide plate (4) side sets There is lock piece (5), lock piece (5) are moved back and forth in slide opening (6), lock piece (5) stretch out the slide opening (6) insertion Breach (41), can limit the second slide plate (4), so that the first cylinder (1) is worked independently, lock piece (5) Retract the slide opening (6), the second slide plate (4) can be avoided, make the first cylinder (1) and second cylinder (2) with When work；

Second slide plate (4) are divided at least two regions by breach (41), and the first end of slide opening (6) is near described Second slide plate (4), second end of slide opening (6) is away from the second slide plate (4), the aperture of the first end of slide opening (6) Less than the size of the Minimum Area of the second slide plate (4), the second slide plate (4) are back and forth transported in the second cylinder (2) During dynamic, the Minimum Area of the second slide plate (4) can be avoided from falling into the slide opening (6).

2. compressor list twin-tub switching device as claimed in claim 1, it is characterised in that：Second end of slide opening (6) Aperture is more than the aperture of the first end of slide opening (6).

3. compressor list twin-tub switching device as claimed in claim 2, it is characterised in that：Described slide opening (6) are shoulder hole, its Including the first hole (61) and the second hole (62), lock piece (5) stretch out the first hole (61) to limit second slide plate (4), aperture described first hole (61) is less than the size of the Minimum Area of the second slide plate (4), the second hole (62) Aperture is more than the aperture of the first hole (61).

4. compressor list twin-tub switching device as claimed in claim 3, it is characterised in that：Lock piece (5) are stepped, Which includes first paragraph (51) and second segment (52), and the radial dimension of first paragraph (51) is less than the hole of the first hole (61) Footpath, the radial dimension of second segment (52) are more than the aperture of the first hole (61), less than the aperture of the second hole (62).

5. compressor list twin-tub switching device as claimed in claim 4, it is characterised in that：Described lock piece (5) include the 3rd Section (53), described 3rd section (53) Wei Yu first paragraph (51) and the second segment (52) between, the 3rd section (53) Radial dimension more than first paragraph (51) radial dimension less than second segment (52) radial dimension, described 3rd section (53) radial dimension is reamed not located at described second hole (62) more than the aperture of the first hole (61), described 3rd section (53) The region for putting in place.

6. compressor list twin-tub switching device as claimed in claim 4, it is characterised in that：Described slide opening (6) include the 3rd hole (63), the 3rd hole (63) is Wei Yu the first hole (61) and the second hole (62) between, the hole of the 3rd hole (63) Footpath is located at second hole more than the aperture of the first hole (61) and the aperture in second hole (62), the 3rd hole (63) (62) fraising region not in place.

7. compressor list twin-tub switching device as claimed in claim 4, it is characterised in that：Second hole of slide opening (6) (62) fit clearance and between the second segment (52) of the lock piece (5) is less than 0.05mm, more than 0.005mm.

8. compressor list twin-tub switching device as claimed in claim 1, it is characterised in that：The first end of slide opening (6) with The second slide plate chamber (3) connection that second slide plate (4) are located, described second slide plate chamber (3) connect the first control mouth (7), institute The second end for stating slide opening (6) is connected with the second control mouth, by the pressure reduction of the first control mouth (7) and second control mouth The lock piece (5) is controlled to move back and forth in the slide opening (6).

9. compressor list twin-tub switching device as claimed in claim 8, it is characterised in that：Bullet is provided with lock piece (5) Spring chamber, is provided with spring (8) in the spring cavity, the spring cavity is connected with second control mouth；First control mouth (7) For high pressure, when second control mouth is low pressure, lock piece (5) can retract the slide opening (6), avoid the described second cunning When piece (4), the first control mouth (7) and second control mouth are low pressure, lock piece (5) can be in the spring (8) slide opening (6) is stretched out under restoring force effect, limit the second slide plate (4).

10. compressor list twin-tub switching device as claimed in claim 9, it is characterised in that：Second control mouth is described The air entry (9) of the second cylinder (2).

11. compressor list twin-tub switching devices as claimed in claim 1, it is characterised in that：Described lock piece (5) be pin or Bearing pin.

A kind of 12. positive displacement compressors, it is characterised in that：Including the compressor list twin-tub as described in any one of claim 1～11 Switching device.

13. positive displacement compressors as claimed in claim 12, it is characterised in that：Including housing (20) and bent axle (10), positioned at institute State the bent axle (10) in housing (20) and be sequentially provided with the first cylinder (1), dividing plate (12), the second cylinder (2) and the second method vertically Blue (13)；The first slide plate chamber and the first roller (15) are provided with first cylinder (1), in the first slide plate chamber, are provided with first Slide plate (14), is provided with the second roller (16), the first roller described in bent axle (10) drive connection in the second cylinder (2) (15) and second roller (16), the first roller (15) and second roller (16) are rotated, and corresponding can be promoted First slide plate (14) and second slide plate (4) are moved back and forth.

14. positive displacement compressors as claimed in claim 13, it is characterised in that：Described slide opening (6) are located at the second flange (13) the first control mouth (7) for, connecting with the slide opening (6) is located at the second cylinder (2), connects with the slide opening (6) Second control mouth is the air entry (9) of the second cylinder (2).

15. positive displacement compressors as claimed in claim 14, it is characterised in that：The air entry (21) of the positive displacement compressor and institute The air entry (9) of the air entry (19) and the second cylinder (2) of stating the first cylinder (1) is connected, the suction of the positive displacement compressor Gas port (21) is sequentially communicated evaporimeter (23), restricting element (24), condenser (25) and the positive displacement compressor by pipeline Exhaust outlet (22)；The exhaust outlet (22) of the positive displacement compressor is connected with first with the pipeline between the condenser (25) Road, the tie point are provided with the first magnetic valve (26), the air entry (21) of the positive displacement compressor and the evaporimeter (23) Between pipeline be connected with the second branch road, second branch road is provided with the second magnetic valve (27), the tie point with described Second branch road all connects the first control mouth (7).