CN105257539A - Multi-cylinder rotary compressor and refrigerating system with same - Google Patents
Multi-cylinder rotary compressor and refrigerating system with same Download PDFInfo
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- CN105257539A CN105257539A CN201510742347.8A CN201510742347A CN105257539A CN 105257539 A CN105257539 A CN 105257539A CN 201510742347 A CN201510742347 A CN 201510742347A CN 105257539 A CN105257539 A CN 105257539A
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Abstract
The invention discloses a multi-cylinder rotary compressor and a refrigerating system with the same. The multi-cylinder rotary compressor comprises a shell and a compression structure. A sealed space is defined in the shell. The compression structure is arranged in the sealed space and comprises multiple air cylinders, a crankshaft, multiple pistons and multiple sliding pieces. The crankshaft is provided with multiple eccentric portions. The pistons are arranged on the eccentric portions in a sleeving manner respectively. The pistons are rotationally arranged in the air cylinders respectively. The sliding pieces are arranged in the air cylinders in a sliding manner respectively and abut against the corresponding pistons respectively. The air cylinders have at least two different gas displacements, and the air cylinder which has the minimum gas displacement has the minimum cylinder diameter. The multi-cylinder rotary compressor is high in efficiency and good in performance.
Description
Technical field
The present invention relates to Compressor Technology field, especially relate to a kind of multi-cylinder rotary compressor and the refrigeration system with this multi-cylinder rotary compressor.
Background technique
In rotary compressor, there is single cylinder and twin-tub (multi-cylinder) structure.Single cylinder compressor structure is comparatively simple, and cost is lower, but due to structural feature, and it exists the larger problem of the fluctuation of eccentric mass and compression moment, and particularly along with the increase of rotating speed, its vibration also obviously worsens.Therefore, compared with in the frequency-changeable compressor of huge discharge, single cylinder structure is adopted to there is limitation.In order to overcome the problem of torque fluctuations, in correlation technique, have employed the structural type of two cylinder or multi cylinder, by the stress balance effect between multi cylinder, reducing the running vibration of compressor, being more suitable for the needs of high frequency running.
Along with the technical development of compressor, the Miniaturization Design with low-cost advantage becomes one of important directions of rotary compressor design.But, along with the reduction of compressor housing size, also restriction is created to compressor pump body structure.In correlation technique, in duplex cylinder compressor, the structure of upper and lower cylinder generally makes symmetric design, and such benefit farthest can reduce torque fluctuations, reduces the vibration of compressor.But this design is difficult to the efficiency advantage playing duplex cylinder compressor, and the size of upper and lower two cylinders all receives the constraint of housing inner diameter, is difficult to accomplish best performance.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the present invention proposes a kind of multi-cylinder rotary compressor, and this multi-cylinder rotary compressor efficiency is high, and performance is good.
The present invention also proposes a kind of refrigeration system with this multi-cylinder rotary compressor.
According to the multi-cylinder rotary compressor of the embodiment of the present invention, comprising: casing, in described casing, limit confined space; Compressing mechanism, described compressing mechanism is located in described confined space, described compressing mechanism comprises: multiple cylinder, bent axle, multiple piston and multiple slide plate, described bent axle is provided with multiple eccentric part, described multiple piston is set on described multiple eccentric part respectively and described multiple piston is located in described multiple cylinder respectively rotationally, described multiple slide plate to be located at slidably respectively in described multiple cylinder and to be only against on corresponding described piston respectively, and described multiple cylinder has at least two kinds of different air displacemenies and the cylinder diameter of the minimum described cylinder of air displacement is minimum.
According to the multi-cylinder rotary compressor of the embodiment of the present invention, by making the air displacement of multiple cylinder have at least two kinds, the high efficiency design of compressor can be realized thus.On the one hand, the cylinder diameter of the cylinder that air displacement is less is less, comparatively speaking, the cylinder diameter design of the cylinder that discharge capacity is large is larger, thus when compressor start, the cylinder of little air displacement (cylinder that cylinder diameter is minimum) can be utilized to set up pressure in compressor housing, after housing internal pressure is promoted to predetermined value, normally can use the cylinder of large-diameter, and then meet the overall air displacement of compressor.Like this, the efficiency of the cylinder that discharge capacity is less is lower slightly, but because air displacement is less, also less on the overall efficiency impact of compressor, thus give full play to the high energy efficiency advantage of large air displacement cylinder, improve the efficiency level of multi-cylinder rotary compressor entirety, the basis realizing miniaturization realizes the high efficiency of compressor.
In some preferred embodiments, the cylinder height of the described cylinder that air displacement is minimum is minimum.
In some preferred embodiments, the cylinder height of described multiple cylinder is equal.
In some preferred embodiments, described multiple cylinder along the vertical direction interval is arranged, the minimum described cylinder of air displacement is positioned at bottom.
In some preferred embodiments, described multiple cylinder along the vertical direction interval is arranged, the maximum described cylinder of air displacement is positioned at bottom.
In some preferred embodiments, the afterbody of the slide plate in the described cylinder that air displacement is minimum is provided with spring.
In some preferred embodiments, the ratio that the air displacement of the described cylinder that air displacement is minimum accounts for described compressor gross exhaust gas is less than or equal to 35%.
In some preferred embodiments, described cylinder is two and comprises the first cylinder and the second cylinder, and the air displacement of described first cylinder is less than the air displacement of described second cylinder.
In some preferred embodiments, the afterbody of the slide plate in described first cylinder is provided with spring.
The refrigeration system of embodiment according to a second aspect of the present invention, comprises according to above-mentioned multi-cylinder rotary compressor.The advantages such as owing to having above-mentioned advantage according to the multi-cylinder rotary compressor of the embodiment of the present invention, thus refrigeration system has corresponding advantage, and namely refrigeration system efficiency is high, performance is good.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structural representation of the compressing mechanism of multi-cylinder rotary compressor according to the embodiment of the present invention.
Reference character:
Compressing mechanism 100;
Cylinder 1; First cylinder 11; Second cylinder 12;
Bent axle 3; Eccentric part 31;
Piston 4; Slide plate 5; Lower bearing 6; Upper bearing (metal) 7; Dividing plate 8; Spring 9.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " on ", D score, " vertically ", " level ", " top ", " end ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Below with reference to Fig. 1, the multi-cylinder rotary compressor according to the embodiment of the present invention is described.As shown in Figure 1, casing (scheming not shown) and compressing mechanism is comprised according to the multi-cylinder rotary compressor of the embodiment of the present invention.
Limit confined space in casing, compressing mechanism is located in the confined space in casing.Compressing mechanism comprises: multiple cylinder 1, bent axle 3, multiple piston 4 and multiple slide plate 5.
Multiple cylinder 1 can be arranged at interval along the vertical direction, is provided with dividing plate 8 between adjacent two cylinders 1.Upper bearing (metal) 7 can be provided with above the cylinder 1 being positioned at the top, below the cylinder 1 being positioned at bottom, lower bearing 6 can be provided with.Limit cylinder-bore in each cylinder 1, multiple piston 4 is located in the cylinder-bore of multiple cylinder 1 respectively rotationally.Each cylinder 1 is also formed with suction port, and refrigerant can enter in cylinder-bore via suction port, and piston 4 rotates prejudicially in cylinder-bore, thus is compressed by the refrigerant be drawn in cylinder-bore, and then discharges compressor.
Bent axle 3 can extend in the vertical direction, and is each passed through the cylinder-bore of each cylinder 1.Also be provided with motor in casing, the rotor secure fit of bent axle 3 and motor, to utilize driven by motor bent axle 3 to rotate.Bent axle 3 is provided with multiple eccentric part 31, and above-mentioned multiple piston 4 is set on multiple eccentric part 31 respectively, when bent axle 3 rotates, and then piston 4 can be driven to rotate in cylinder-bore.
Multiple slide plate 5 to be located at slidably respectively in multiple cylinder 1 and to be only against on corresponding piston 4 respectively, and particularly, be provided with slide plate 5 groove in each cylinder 1, slide plate 5 is located in slide plate 5 groove slidably.It is to be understood that one end that slide plate 5 and piston 4 only support is called the head of slide plate 5, slide plate 5 and piston 4 away from one end be called the afterbody of slide plate 5.
Multiple cylinder 1 has at least two kinds of different air displacemenies and the cylinder diameter of the minimum cylinder 1 of air displacement is minimum.It should be noted that, multiple cylinder 1 refers to that the quantity of cylinder 1 can be two or more.
When the quantity of cylinder 1 is two, the air displacement of two cylinders 1 is different, and the cylinder diameter (i.e. the diameter of cylinder-bore) of the little cylinder 1 of air displacement is less than the cylinder diameter of the large cylinder of air displacement 1.
When the quantity of cylinder 1 is two or more, have at least the air displacement of different from the air displacement of other cylinder 1 in multiple cylinder 1, and the air displacement of other cylinder 1 can be the same or different, in certain multiple cylinder 1, each cylinder 1 is compared with other cylinders 1, and air displacement can be different.When the quantity of cylinder 1 is two or more, the cylinder diameter (i.e. the diameter of cylinder-bore) of the cylinder 1 that air displacement is little is minimum in multiple cylinder 1.
According to the multi-cylinder rotary compressor of the embodiment of the present invention, by making the air displacement of multiple cylinder 1 have at least two kinds, the high efficiency design of compressor can be realized thus.On the one hand, the cylinder diameter of the cylinder 1 that air displacement is less is less, comparatively speaking, the cylinder diameter design of the cylinder 1 that discharge capacity is large is larger, thus when compressor start, the cylinder 1 (cylinder 1 that cylinder diameter is minimum) of little air displacement can be utilized to set up pressure in compressor housing, after housing internal pressure is promoted to predetermined value, normally can use the cylinder 1 of large-diameter, and then meet the overall air displacement of compressor.Like this, the efficiency of the cylinder 1 that discharge capacity is less is lower slightly, but because air displacement is less, also less on the overall efficiency impact of compressor, thus give full play to the high energy efficiency advantage of large air displacement cylinder 1, improve the efficiency level of multi-cylinder rotary compressor entirety, the basis realizing miniaturization realizes the high efficiency of compressor.
On the other hand, by larger for cylinder 1 internal diameter larger for air displacement design, and the spring 9 of slide plate 5 afterbody of the prior art can be cancelled in the cylinder 1 that air displacement is larger, cylinder can be reduced by increase cylinder diameter thus high while meeting air displacement, and then the leakage of cylinder 1 can be slowed down, thus the efficiency of compressor entirety can be improved further.
In some embodiments of the invention, the ratio that the air displacement of the cylinder 1 that air displacement is minimum accounts for compressor gross exhaust gas is less than or equal to 35%.Namely in other words, the ratio that the air displacement of the cylinder 1 that air displacement is minimum accounts for compressor gross exhaust gas is less than 35%, or the ratio that the air displacement of the minimum cylinder 1 of air displacement accounts for compressor gross exhaust gas equals 35%.The impact of the minimum cylinder of air displacement 1 on the overall efficiency of compressor can be reduced thus, its objective is the lifting effect that the efficiency of the cylinder 1 that can give full play to larger air displacement is brought the overall efficiency of compressor.
Preferably, the air displacement of cylinder 1 minimum for air displacement can be reduced further, such as the air displacement of cylinder 1 minimum for air displacement can being accounted for the Proportionality design of compressor gross exhaust gas for being less than or equal to 30%, the impact of the minimum cylinder of air displacement 1 on the overall efficiency of compressor can be reduced thus further.
Alternatively, the cylinder height of the cylinder 1 that air displacement is minimum is minimum.Correspondingly, by larger for the design of the cylinder of cylinder 1 larger for air displacement height, thus air displacement larger cylinder 1 inside cylinder pore volume can be improved further, the air displacement of large air displacement cylinder 1 can be improved thus further, and then the efficiency of large air displacement cylinder 1 can be improved.
Certainly, alternatively, the cylinder of multiple cylinder 1 is high can be equal, and the mounting arrangements of multiple cylinders 1 in housing can be made thus simpler.
Alternatively, multiple cylinder 1 along the vertical direction interval is arranged, the minimum cylinder 1 of air displacement is positioned at bottom.Correspondingly, the cylinder 1 of large air displacement can be located at the top of the cylinder 1 of little air displacement, is beneficial to the stress balance of compressing mechanism thus, reduces the vibration of compressor.
Certainly, multiple cylinder 1 along the vertical direction interval is arranged, the maximum cylinder 1 of air displacement is positioned at bottom.The cylinder 1 of large air displacement is more close to the bottom oil sump of compressor thus, thus can improve lubrication and sealing effect, improves the performance of large air displacement cylinder 1 further, and then can improve compressor efficiency and performance.
In some embodiments of the invention, the afterbody of the slide plate 5 in the cylinder 1 that air displacement is minimum is provided with spring 9, thus, when compressor start and the cylinder 1 utilizing air displacement little sets up the pressure of compressor inside, now may produce between slide plate 5 and piston 4 and collide thus the noise that collides.Be provided with spring 9 by the afterbody of the slide plate 5 in the minimum cylinder 1 of air displacement, thus the afterbody to slide plate 5 of spring 9 can be utilized to produce Driving force, thus the transition between piston 4 and slide plate 5 can be avoided to collide, and then the noise of compressor can be reduced.
Preferably, slide plate 5 afterbody in the cylinder 1 that air displacement is larger does not arrange spring 9, and it can ensure the snug fit of slide plate 5 and piston 4 by the pressure of compressor inside, thus avoids the problem that spring 9 design is limited to miniaturization structure.Further the cylinder-bore in cylinder 1 larger for air displacement can be expanded thus, thus expand the air displacement of cylinder 1, and then improve the overall efficiency of compressor.
Describe according to a preferred embodiment of the present invention referring to Fig. 1.Wherein compressor illustrated in fig. 1 is twin-tub rotation-type compressor.This compressor comprises casing (scheming not shown) and compressing mechanism 100.
As shown in Figure 1, this compressing mechanism 100 comprises two cylinders, bent axle 3, two pistons 4 and two slide plates 5.Two cylinders are respectively the first cylinder 11 and the second cylinder 12, and bent axle 3 is provided with two eccentric parts, 31, two pistons 4 and is set on two eccentric parts 31 respectively, and two slide plates 5 are separately positioned in the first cylinder 11 and the second cylinder 12.
The below of the first cylinder 11 is provided with lower bearing 6, and the top of the second cylinder 12 is provided with upper bearing (metal) 7, is provided with dividing plate 8 between the first cylinder 11 and the second cylinder 12.
Wherein the air displacement of the first cylinder 11 is less than the air displacement of the second cylinder 12, and correspondingly, the cylinder diameter of the first cylinder 11 is less than the cylinder diameter of the second cylinder 12.During compressor start, can only make the first cylinder 11 work, the second cylinder 12 can not start.The first cylinder 11 of small displacement now can be utilized to set up the pressure of compressor inside, that is, after making the first cylinder 11 run a period of time, enter to enclosure interior after the pressure of cold media air is enhanced, thus after the pressure of enclosure interior can be made to reach the breakout pressure of the second cylinder 12, the second cylinder 12 can be made again to carry out work.
As shown in Figure 1, the afterbody of the slide plate 5 in the first cylinder 11 is provided with spring 9, this spring 9 can be utilized thus to produce Driving force to the afterbody of the slide plate 5 in the first cylinder 11, thus the transition between piston 4 and slide plate 5 can be avoided to collide, and then the noise of compressor can be reduced.
Preferably, the afterbody of the slide plate 5 of the second cylinder 12 inside can not arrange spring 9.While meeting air displacement, cylinder can be reduced by the cylinder diameter increasing by the second cylinder 12 thus high, and then the leakage of the second cylinder 12 can be slowed down, thus the efficiency of compressor entirety can be improved further.
In the example depicted in fig. 1, the first cylinder 11 is positioned at the below of the second cylinder 12, is beneficial to the stress balance of compressing mechanism 100 thus, can reduce the vibration of compressor.Wherein, the high cylinder in the second cylinder 12 of cylinder of the first cylinder 11 is high, be conducive to the second cylinder 12 thus and the layout of the second cylinder 12 in housing simpler.
The invention allows for a kind of refrigeration system, this refrigeration system at least comprises multi-cylinder rotary compressor as above-mentioned in the present invention, high pressure heat exchanger, throttling arrangement and low pressure heat exchanger, and compressor, high pressure heat exchanger, throttling arrangement and low pressure heat exchanger join end to end to form refrigerant circulation successively.
The advantages such as owing to having above-mentioned advantage according to the multi-cylinder rotary compressor of the embodiment of the present invention, thus refrigeration system has corresponding advantage, and namely refrigeration system efficiency is high, performance is good.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. a multi-cylinder rotary compressor, is characterized in that, comprising:
Casing, limits confined space in described casing;
Compressing mechanism, described compressing mechanism is located in described confined space, described compressing mechanism comprises: multiple cylinder, bent axle, multiple piston and multiple slide plate, described bent axle is provided with multiple eccentric part, described multiple piston is set on described multiple eccentric part respectively and described multiple piston is located in described multiple cylinder respectively rotationally, described multiple slide plate to be located at slidably respectively in described multiple cylinder and to be only against on corresponding described piston respectively, and described multiple cylinder has at least two kinds of different air displacemenies and the cylinder diameter of the minimum described cylinder of air displacement is minimum.
2. multi-cylinder rotary compressor according to claim 1, is characterized in that, the cylinder height of the described cylinder that air displacement is minimum is minimum.
3. multi-cylinder rotary compressor according to claim 1, is characterized in that, the cylinder height of described multiple cylinder is equal.
4. multi-cylinder rotary compressor according to claim 1, is characterized in that, described multiple cylinder along the vertical direction interval is arranged, the minimum described cylinder of air displacement is positioned at bottom.
5. multi-cylinder rotary compressor according to claim 1, is characterized in that, described multiple cylinder along the vertical direction interval is arranged, the maximum described cylinder of air displacement is positioned at bottom.
6. multi-cylinder rotary compressor according to claim 1, is characterized in that, the afterbody of the slide plate in the described cylinder that air displacement is minimum is provided with spring.
7. the multi-cylinder rotary compressor according to any one of claim 1-6, is characterized in that, the ratio that the air displacement of the described cylinder that air displacement is minimum accounts for described compressor gross exhaust gas is less than or equal to 35%.
8. multi-cylinder rotary compressor according to claim 1, is characterized in that, described cylinder is two and comprises the first cylinder and the second cylinder, and the air displacement of described first cylinder is less than the air displacement of described second cylinder.
9. multi-cylinder rotary compressor according to claim 8, is characterized in that, the afterbody of the slide plate in described first cylinder is provided with spring.
10. a refrigeration system, is characterized in that, comprises the multi-cylinder rotary compressor according to any one of claim 1-9.
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| CN201510742347.8A CN105257539A (en) | 2015-11-02 | 2015-11-02 | Multi-cylinder rotary compressor and refrigerating system with same |
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| CN201510742347.8A CN105257539A (en) | 2015-11-02 | 2015-11-02 | Multi-cylinder rotary compressor and refrigerating system with same |
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Cited By (1)
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| CN106014990A (en) * | 2016-07-15 | 2016-10-12 | 上海日立电器有限公司 | Double-cylinder rotary compressor and air conditioning system thereof |
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Application publication date: 20160120 |