CN104963864A - Multi-cylinder rotary compressor and refrigeration cycle device with same - Google Patents
Multi-cylinder rotary compressor and refrigeration cycle device with same Download PDFInfo
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- CN104963864A CN104963864A CN201510408486.7A CN201510408486A CN104963864A CN 104963864 A CN104963864 A CN 104963864A CN 201510408486 A CN201510408486 A CN 201510408486A CN 104963864 A CN104963864 A CN 104963864A
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Abstract
The invention discloses a multi-cylinder rotary compressor and a refrigeration cycle device with the same. The multi-cylinder rotary compressor comprises a motor part, a plurality of compression mechanism parts and two bearings, wherein each compression mechanism part comprises a cylinder, a crankshaft, a roller and a sliding sheet; a sliding sheet backpressure chamber arranged in the first cylinder comprises a spring which exerts elastic force on the rear end part of the corresponding sliding sheet to enable the front end part of the sliding sheet to be in contact with the peripheral wall of the corresponding roller; a sliding sheet backpressure chamber of each cylinder except the first cylinder is connected with a pressure control distribution pipe which is used for supplying by switching between high-pressure gas and low-pressure gas to control whether each cylinder chamber is effectively compressed. According to the multi-cylinder rotary compressor provided by the embodiment of the invention, large-scale load regulation can be achieved by the rotating speed and the number of the compression mechanism parts of which an effective compression action is varied.
Description
Technical field
The present invention relates to refrigerating field, especially relate to a kind of multi-cylinder rotary air compressor and there is its refrigerating circulatory device.
Background technique
In the refrigerating circulatory device of single compressor, control to regulate refrigerant circulation by means of only rotating speed, usually the needs that load acutely converts can not be adapted to, therefore multiple compressors parallel connection is used in same cooling cycle system, greatly can widen the load capacity scope of cooling cycle system, but in the refrigerating circulatory device of multiple compressors parallel connection, the refrigerator oil of each compressor and the mixed flow of refrigerant know from experience the pipeline together entered in refrigerating circulatory device, condenser and vaporizer, and the fluid-mixing of refrigerator oil and refrigerant and the mobility status of refrigerant inconsistent, therefore the oil mass being difficult to ensure to return each compressor is consistent with the oil mass that each compressor is discharged, it is uneven that each compressor in running there will be oil return, compressor pasta may be caused to decline, thus damage compressor.
In order to ensure that each compressor oil return is even, usually need in refrigerating circulatory device, increase oil separator, solenoid valve and oil mass balanced loop etc., but form and control more complicated, cost can significantly increase.
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 air compressor, can realize large-scale Load Regulation by rotating speed and the number of the compression mechanical part of the effective compression of change simultaneously.
The present invention also proposes a kind of refrigerating circulatory device with above-mentioned multi-cylinder rotary air compressor.
According to the multi-cylinder rotary air compressor of the embodiment of the present invention, it has accommodated the motor part connected via bent axle, multiple compression mechanical part and two bearings in seal casinghousing, each described compression mechanical part comprises cylinder, bent axle, roller and a slide plate, the inside diameter of each described cylinder is formed with the cylinder chamber imported for low-pressure gas, and is provided with the slide plate back pressure chamber be communicated with these cylinder chamber via vane slot; Each described bent axle has the eccentric part in the described cylinder chamber being housed in corresponding described cylinder; Each described roller is chimeric with the eccentric part of corresponding described bent axle, along with the rotation of described bent axle in corresponding described cylinder chamber eccentric rotary; Each described slide plate can be housed in corresponding described vane slot with being freely shifted in the horizontal direction, and under the state abutted with described roller perisporium at its front end, described cylinder chamber is divided into two rooms; Multiple described cylinder is arranged across intermediate clapboard; The end face of described multiple cylinder is located at respectively by described two bearings, covers described cylinder chamber together with described intermediate clapboard; The described slide plate back pressure chamber being located at first cylinder comprises the spring contacted with the perisporium of described roller to make the front end of described slide plate the rearward end applying elastic force of described slide plate; Whether the described slide plate back pressure chamber of each cylinder except described first cylinder is connected with the Stress control pipe arrangement switching pressurized gas and low-pressure gas and carry out supplying, effectively compress to control described each cylinder chamber.
According to the multi-cylinder rotary air compressor of the embodiment of the present invention, by changing the number of effectively carrying out the cylinder compressed, refrigerant circulation in a seal casinghousing can change, with the existing frequency-changeable compressor only variable quantity that brings of rotation speed change, excursion is wider, simultaneously because multi-cylinder rotary air compressor R comprises multiple cylinder chamber, and whether multiple cylinder chamber can control effectively to compress, therefore in the refrigerating circulatory device of single compressor, large-scale Load Regulation can be realized by rotating speed and the number of the compression mechanical part of the effective compression of change simultaneously.
In some embodiments of the invention, the described bent axle of described multiple compression mechanical part can carry out combining, being separated.
Alternatively, between two the described bent axles can carry out combining, being separated by groove with male cooperation to be fixedly connected with.
Further alternatively, the cross section of described groove and described projection is formed as " ten " shape respectively.
In a particular embodiment of the present invention, described compression mechanical part is even number and is divided into multipair, and often pair of described compression mechanical part shares a described bent axle.
Preferably, the joint of two the described bent axles can carry out combining, being separated has gap.
According to the refrigerating circulatory device of the embodiment of the present invention, comprise multi-cylinder rotary air compressor according to the above embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is the sectional view of the multi-cylinder rotary air compressor of the embodiment of the present invention;
Fig. 2 is the bent axle joint schematic diagram of the embodiment of the present invention;
Fig. 3 is the refrigerant circulation flow characteristic of compressor efficiency of the present invention and rotation speed change curve, effectively compression mechanical part.
Reference character:
R multi-cylinder rotary air compressor, 2 seal casinghousings, 3 outlet pipes, 4 condensers, 5 expansion valves, 6 vaporizers, 7 sucking pipes, 21 stators, 22 rotors, 23a ~ 23b bent axle, 24a ~ 24d compression mechanical part, 25a ~ 25d cylinder, 26a ~ 26d roller, 27a ~ 27d slide plate, 28a bearing, 28f bearing, 28b ~ 28e intermediate clapboard, 29 oil pump mechanism, 30a ~ 30d slide plate back pressure chamber, 31a ~ 31d pressure switches pipe, 32a ~ 32d pressure switching valve, 34 springs.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are 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 limitation of the present invention can not be interpreted as.
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 at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection or each other can communication; 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, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
The multi-cylinder rotary air compressor R according to the embodiment of the present invention is described in detail below with reference to Fig. 1-Fig. 3, wherein this multi-cylinder rotary air compressor R can be applied in refrigerating circulatory device, the device that above-mentioned refrigerating circulatory device can need refrigeration for air conditioner, vehicle cooling air conditioner etc. or heat.
As shown in Figure 1, according to the multi-cylinder rotary air compressor R of the embodiment of the present invention, its accommodated in seal casinghousing 2 via bent axle connect motor part, multiple compression mechanical part 24a-24d and two bearing 28a, 28f, each compression mechanical part comprises cylinder, bent axle, roller and a slide plate, the inside diameter of each cylinder is formed with the cylinder chamber imported for low-pressure gas, and is provided with the slide plate back pressure chamber be communicated with these cylinder chamber via vane slot; Each bent axle has the eccentric part in the cylinder chamber being housed in corresponding cylinder.
Each roller is chimeric with the eccentric part of corresponding bent axle, along with the rotation of bent axle in corresponding cylinder chamber eccentric rotary.
Each slide plate can be housed in corresponding vane slot with being freely shifted in the horizontal direction, and under the state abutted with roller perisporium at its front end, cylinder chamber is divided into two rooms.
Multiple cylinder 25a ~ 25d is arranged across intermediate clapboard.Two bearings 28a, 28f are located at the end face of multiple cylinder 25a ~ 25d respectively, cover cylinder chamber together with intermediate clapboard.
The slide plate back pressure chamber 30a being located at first cylinder 25a comprises the spring 34 contacted with the perisporium of roller 26a to make the front end of slide plate 27a the rearward end applying elastic force of slide plate 27a.
Whether the slide plate back pressure chamber 30b-30d of each cylinder 25b-25d except first cylinder 25a is connected with the Stress control pipe arrangement switching pressurized gas and low-pressure gas and carry out supplying, effectively compress to control each cylinder chamber.
In other words, according to the multi-cylinder rotary air compressor R of the embodiment of the present invention, comprise seal casinghousing 2, motor part and multiple compression mechanical part 24a ~ 24d.Wherein motor part and multiple compression mechanical part 24a ~ 24d are located in seal casinghousing 2 respectively, and motor part is connected by bent axle with multiple compression mechanical part 24a ~ 24d.Motor section comprises stator 21 and rotor 22.
Each compression mechanical part comprises cylinder, bent axle, roller and a slide plate.Multiple cylinder 25a ~ 25d arranges successively setting on the length direction of bent axle.Each cylinder has cylinder chamber and the slide plate back pressure chamber be communicated with cylinder chamber by vane slot.Be clamped with intermediate clapboard between two often adjacent cylinders, bearing 28a is placed on first cylinder 25a, and bearing 28f is placed on last cylinder 25d, and bearing 28a, bearing 28f and multiple intermediate clapboard 28b ~ 28e coordinate with spaced apart multiple cylinder chamber.
The upper end of the bent axle of first compression mechanical part 24a is connected to drive rotation by rotor 22 with rotor 22, and the bent axle of multiple compression mechanical part is connected.Each bent axle comprises eccentric part, and multiple eccentric part is accommodated in multiple cylinder chamber respectively.Also be accommodated with roller in each cylinder chamber, each roller envelope on corresponding eccentric part to drive eccentric rotary by eccentric part.Reciprocating slide plate is provided with, so that corresponding cylinder chamber is divided into two rooms on the periphery wall that the front end of each slide plate only can be against corresponding roller in the eccentric grove of each cylinder.
Be provided with spring 34 in the slide plate back pressure chamber 30a of first cylinder 25a, this spring 34 applies elastic force to the rearward end of the slide plate 27a in the vane slot of first cylinder 25a and is only against all the time on the periphery wall of roller 26a to make the front end of this slide plate 27a.
The slide plate back pressure chamber 30b-30d of the remaining cylinders 25b-25d of removing first cylinder 25a switches respectively between environment under low pressure and hyperbaric environment, when environment in the slide plate back pressure chamber of one of them cylinder is hyperbaric environment, pressure difference is there is between the rearward end of the slide plate of corresponding cylinder and front end, under the effect of pressure difference, cylinder chamber to be divided into two rooms on the periphery wall that the front end of corresponding slide plate is only against corresponding roller, thus this cylinder can carry out compression work.
Therefore, by controlling the number being in the slide plate back pressure chamber of hyperbaric environment of the remaining cylinders 25b-25d of removing first cylinder 25a, the number of carrying out the cylinder compressed can be controlled, thus realize the adjustment of the decrement of multi-cylindrical rotary compressor.
According to the multi-cylinder rotary air compressor R of the embodiment of the present invention, by changing the number of effectively carrying out the cylinder compressed, refrigerant circulation in a seal casinghousing 2 can change, with the existing frequency-changeable compressor only variable quantity that brings of rotation speed change, excursion is wider, simultaneously because multi-cylinder rotary air compressor R comprises multiple cylinder chamber, and whether multiple cylinder chamber can control effectively to compress, therefore in the refrigerating circulatory device of single compressor, large-scale Load Regulation can be realized by rotating speed and the number of the compression mechanical part of the effective compression of change simultaneously.
In some embodiments of the invention, the bent axle of multiple compression mechanical part 24a ~ 24d can carry out combining, being separated.That is, the bent axle of multiple compression mechanical part 24a ~ 24d is removably, thus is convenient to the machine shaping of multi-cylinder rotary air compressor R, meets the requirement of multi-cylinder rotary air compressor R to cylinder, fit up gap between bent axle and roller simultaneously.In concrete example of the present invention, compression mechanical part is even number and is divided into multipair, and often pair of compression mechanical part shares a bent axle, and that is, the bent axle of often pair of compression mechanical part is non-removable.Such as shown in Figure 1, compression mechanical part is four, and first compression mechanical part 24a and second compression mechanical part 24b shares a bent axle, and the 3rd compression mechanical part 24c and a 4th compression mechanical part 24d shares a bent axle.
Alternatively, as shown in Figure 2, between two bent axles can carry out combining, being separated by groove with male cooperation to be fixedly connected with.Thus be convenient to the assembling of bent axle.Further alternatively, groove and protruding cross section are formed as " ten " shape respectively.Thus the join strength between the bent axle that can improve connection.
Preferably, between the joint of two bent axles can carry out combining, being separated, there is gap.Thus the skew in axle center can be absorbed, can smooth and easy transmission rotation torque.
According to the refrigerating circulatory device of the embodiment of the present invention, comprise multi-cylinder rotary air compressor R according to the above embodiment of the present invention.
Below with reference to Fig. 1-Fig. 3, the multi-cylinder rotary air compressor R according to the specific embodiment of the invention is described in detail.
Describe according to the schematic cross-section structural drawing of the multi-cylinder rotary air compressor R of the embodiment of the present invention and the refrigeration cycle structure schematic diagram of refrigerating circulatory device comprising this multi-cylinder rotary air compressor R see Fig. 1.
Multi-cylinder rotary air compressor R according to the embodiment of the present invention: the top in seal casinghousing 2 is provided with the motor part be made up of stator 21 and rotor 22, bottom in seal casinghousing 2 is provided with compression mechanical part, and motor part is connected by bent axle 23a and bent axle 23b with compression mechanical part.
According to the multi-cylinder rotary air compressor R of the embodiment of the present invention by the formation refrigerating circulatory device that is linked in sequence from outlet pipe 3, condenser 4, expansion valve 5, vaporizer 6, sucking pipe 7, the large load capacity range of corresponding cooling cycle system.
4 compression mechanical part 24a ~ 24d are had according to the multi-cylinder rotary air compressor R of the embodiment of the present invention, comprise: multiple cylinder 25a ~ 25d, the plurality of cylinder 25a ~ 25d is arranged across intermediate clapboard 28b ~ 28e, and be formed with the cylinder chamber imported for low-pressure gas at respective inside diameter, and be provided with the slide plate back pressure chamber be communicated with these cylinder chamber via vane slot; Bearing 28a, 28f, this bearing 28a, 28f are located at the end face of the plurality of cylinder 25a ~ 25d, cover cylinder chamber together with intermediate clapboard 28b ~ 28e; Bent axle 23a, 23b, this bent axle has the eccentric part be housed in multiple cylinder described cylinder chamber separately; Roller 26a ~ 26d, this roller is chimeric with the eccentric part of bent axle 23a and bent axle 23b, distinguishes eccentric rotary along with the rotation of described bent axle 23a and bent axle 23b in described cylinder chamber; Slide plate 27a ~ 27d, what this slide plate 27a ~ 27d can be freely shifted in the horizontal direction is housed in described vane slot, and under the state abutted with roller 26a ~ 26d perisporium at its front end, described cylinder chamber is divided into two rooms; The slide plate back pressure chamber being located at first cylinder chamber comprises the spring 34 contacted with the perisporium of roller 26a to make the front end of slide plate 27a the rearward end applying elastic force of slide plate 27a, and there is oil pump mechanism 29 bottom of the lower bearing 28f of compression mechanical part to the refrigerator oil of the hole supply lubrication of through bent axle 23b.
The slide plate back pressure chamber 30a of cylinder 25a is communicated with in seal casinghousing 2.The slide plate back pressure chamber 30b ~ 30d of cylinder 25b ~ 25d carries out the pressure supplied from compressor R outside connection switching pressurized gas and low-pressure gas respectively by pressure switching pipe 31b ~ 31d.
Pressure switches pipe 31b branch, is connected, while be connected with the pipeline 33a be communicated with pressure switching valve 32b with pressure switching valve 32a.Pressure switches pipe 31c branch, is connected, while be connected with the pipeline 33b be communicated with pressure switching valve 32c with pressure switching valve 32b.Described pressure switches pipe 31d branch, is connected, while be connected with the pipeline 33c be communicated with pressure switching valve 32d with pressure switching valve 32c.
Pressure switching valve 32a is connected with pipeline 33a and with the pipeline that the pressure duct of refrigeration cycle is communicated with, and when opening, pipeline 33a is high pressure conditions.Pressure switching valve 32d is connected with pipeline 33c and with the low pressure line of refrigeration cycle, and when opening, pipeline 33c is low-pressure state.
See Fig. 2 description according to the bent axle 23a of the multi-cylinder rotary air compressor R of the embodiment of the present invention and bent axle 23b joint schematic diagram.The lug boss 40 of cross shape is defined in the upper end of bent axle 23b, the lower end of bent axle 23a defines the recess 41 mutually embedding with lug boss 40, recess 41 size is greater than the size of lug boss 40, guarantees the gap of more than the maximum build-up tolerance of the intermediate clapboard 28c of compression mechanical part and the intermediate clapboard 28d of compression mechanical part.
See Fig. 3, the refrigerant circulation flow characteristic according to compressor efficiency of the present invention and rotation speed change curve, effectively compression mechanical part is described.First be minimum refrigerant circulation, closing pressure switching valve 32a, opens pressure switching valve 32b, 32c, 32d.If compressor rotates with minimum speed r1, compression mechanical part 24a internal cause has the resilient force of spring 34, and the front end of slide plate 27a is contacted with the perisporium of roller 26a, and the cylinder chamber of compression mechanical part 24a normally effectively compresses.Compression mechanical part 24a effectively compresses, then the pressure increase in closed shell 2, by the pressure drop of suction pipe 7 side.Because slide plate back pressure chamber 30a is communicated with in closed shell 2, then slide plate back pressure chamber 30a pressure becomes the pressure (hereinafter referred to as high pressure) in closed shell, and the front end of slide plate 27a tightly contacts with the perisporium of roller 26a.Closing pressure switching valve 32a, because pressure switching valve 32b, 32c, 32d open, pipeline 33a, 33b, 33c all become the pressure (hereinafter referred to as low pressure) of suction pipe 7 side.Slide plate back pressure chamber 30b, 30c, 30d are low pressure, and slide plate 27b, 27c, 27d are zero along the radial force of vane slot, are all accommodated in vane slot.Because cylinder 25b, 25c, 25d are not divided into press part and sucting, compression work will not be carried out.Therefore press shown in Fig. 3, only the cylinder 25a of compression mechanical part 24a operates, by the state running of the refrigerant circulation Qr1 under r1rps running.
When refrigerant circulation is from Qr1 to Qr2, under the state of above-mentioned pressure switching valve, guarantee refrigerant circulation by rotating speed is promoted to r2.When refrigerant circulation is Qr2, closing pressure switching valve 32b, open pressure switching valve 32a, 32c, 32d, compressor rotary speed is set to r3.By opening pressure switching valve 32a, by pipeline 33a, slide plate back pressure chamber 30b becomes high pressure, and the front end of slide plate 27b tightly contacts with the perisporium of roller 26b, and the cylinder chamber of compression mechanical part 24b normally effectively compresses.Because pressure switching valve 32b is closed, pipeline 33b, 33c and slide plate back pressure chamber 30c, 30d maintain low pressure, and the cylinder chamber of compression mechanical part 24c, 24d will not carry out compression work.Therefore become cylinder 25a, 25b running of compression mechanical part 24a, 24b, therefore press shown in Fig. 3, the state running of the refrigerant circulation Qr2 under the r3rps rotation of cylinder 25a, 25b running of compression mechanical part 24a, 24b.
When refrigerant circulation is from Qr2 to Qr3, under the state of above-mentioned pressure switching valve, guarantee refrigerant circulation by rotating speed is promoted to r4.When refrigerant circulation becomes Qr3, then closing pressure switching valve 32c, opens pressure switching valve 32a, 32b, 32d, compressor rotary speed is set to r5.By opening pressure switching valve 32a, 32b, slide plate back pressure chamber 30b, 30c become high pressure by pipeline 33a, 33b, the front end of slide plate 27b, 27c tightly contacts with the perisporium of roller 26b, 26c, and the cylinder chamber of compression mechanical part 24b, 24c normally effectively compresses.Because pressure switching valve 32c is closed, pipeline 33c and slide plate back pressure chamber 30d maintains low pressure, and the cylinder chamber of compression mechanical part 24d will not carry out compression work.Therefore the cylinder 25a ~ 25c becoming compression mechanical part 24a ~ 24c operates, and therefore presses shown in Fig. 3, the state running of the refrigerant circulation Qr3 under the r5rps rotation of cylinder 25a ~ c running of compression mechanical part 24a ~ c.
When refrigerant circulation is from Qr3 to Qr4, under the state of above-mentioned pressure switching valve, guarantee refrigerant circulation by rotating speed is promoted to r6.When refrigerant circulation becomes Qr4, then closing pressure switching valve 32d, open pressure switching valve 32a, 32b, 32c, compressor rotary speed is set to r7.Because of pressure switching valve 32a, 32b, 32c opens, pressure switching valve 32d closes, by pipeline 33a, 33b, 33c, slide plate back pressure chamber 30b, 30c, 30d become high pressure, the front end of slide plate 27b ~ 27d tightly contacts with the perisporium of roller 26b ~ 26d, and the cylinder chamber that can realize full compression mechanism part 24a ~ 24d normally effectively compresses.Therefore the cylinder 25a ~ 25d becoming compression mechanical part 24a ~ 24d operates, and therefore presses shown in Fig. 3, the state running of the refrigerant circulation qr4 under the r8rps rotation of cylinder 25a ~ 25d running of compression mechanical part 24a ~ 24d.
When refrigerant circulation is from Qr4 to maximum refrigerant circulation Qr5, under the state of above-mentioned pressure switching valve, guarantee refrigerant circulation by rotating speed being promoted to maximum (top) speed r8.
According to the multi-cylinder rotary air compressor of the embodiment of the present invention, by changing the compression mechanical part effectively carrying out compressing, refrigerant circulation in a seal casinghousing can change from Qr1 to Qr5, and more common frequency-changeable compressor is the variable quantity that brings of rotation speed change only, and excursion is wider.
On common frequency-changeable compressor, as shown in Figure 3, can efficiency be changed by compressor rotary speed change, guarantee from 30rps to 90rps stability and high efficiency in interval, but when compressor rotary speed is lower than during during 20rps or higher than 100rps, compressor efficiency obviously declines.According to the multi-cylinder rotary air compressor of the embodiment of the present invention, rotation speed operation between the situation of nearly all refrigerant circulation change all can realize from 30rps to 90rps, can realize high-efficiency operation during reality use.
The assembling of the cylinder in rotary compressor, bent axle, roller, strict to requiring gap to manage, multiple compression mechanical part can not be assembled by a bent axle.According to the multi-cylinder rotary air compressor of the embodiment of the present invention, assembled by 1 bent axle by existing 2 compression mechanical parts, as shown in Figure 2, the joint of bent axle arranges gap, absorbs the skew in axle center, can smooth and easy transmission rotation torque.
Be the rotary compressor having 4 compression mechanical parts according to the multi-cylinder rotary air compressor of the embodiment of the present invention, by same formation, more compression mechanical part can be adopted.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " 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, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (7)
1. a multi-cylinder rotary air compressor, it has accommodated the motor part connected via bent axle, multiple compression mechanical part and two bearings in seal casinghousing, it is characterized in that, each described compression mechanical part comprises cylinder, bent axle, roller and a slide plate, the inside diameter of each described cylinder is formed with the cylinder chamber imported for low-pressure gas, and is provided with the slide plate back pressure chamber be communicated with these cylinder chamber via vane slot; Each described bent axle has the eccentric part in the described cylinder chamber being housed in corresponding described cylinder;
Each described roller is chimeric with the eccentric part of corresponding described bent axle, along with the rotation of described bent axle in corresponding described cylinder chamber eccentric rotary;
Each described slide plate can be housed in corresponding described vane slot with being freely shifted in the horizontal direction, and under the state abutted with described roller perisporium at its front end, described cylinder chamber is divided into two rooms;
Multiple described cylinder is arranged across intermediate clapboard; The end face of described multiple cylinder is located at respectively by described two bearings, covers described cylinder chamber together with described intermediate clapboard;
The described slide plate back pressure chamber being located at first cylinder comprises the spring contacted with the perisporium of described roller to make the front end of described slide plate the rearward end applying elastic force of described slide plate;
Whether the described slide plate back pressure chamber of each cylinder except described first cylinder is connected with the Stress control pipe arrangement switching pressurized gas and low-pressure gas and carry out supplying, effectively compress to control described each cylinder chamber.
2. multi-cylinder rotary air compressor according to claim 1, is characterized in that, the described bent axle of described multiple compression mechanical part can carry out combining, being separated.
3. multi-cylinder rotary air compressor according to claim 2, between two the described bent axles can carry out combining, being separated by groove with male cooperation to be fixedly connected with.
4. multi-cylinder rotary air compressor according to claim 3, is characterized in that, the cross section of described groove and described projection is formed as " ten " shape respectively.
5. multi-cylinder rotary air compressor according to claim 2, is characterized in that, described compression mechanical part is even number and is divided into multipair, and often pair of described compression mechanical part shares a described bent axle.
6. multi-cylinder rotary air compressor according to claim 2, is characterized in that, the joint of two the described bent axles can carry out combining, being separated has gap.
7. a refrigerating circulatory device, is characterized in that, comprises the multi-cylinder rotary air compressor according to any one of claim 1-6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017008229A1 (en) * | 2015-07-13 | 2017-01-19 | 广东美芝制冷设备有限公司 | Multi-cylinder rotary compressor and refrigeration circulation apparatus having same |
| CN106704188A (en) * | 2017-02-24 | 2017-05-24 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigeration system having same |
| CN108591537A (en) * | 2018-06-19 | 2018-09-28 | 广东美芝精密制造有限公司 | Fluid pressure switching valve, capacity-varying rotary type compressor and refrigerating circulatory device |
| CN108799115A (en) * | 2018-08-03 | 2018-11-13 | 天津商业大学 | Become four cylinder Two-stage Compression compressor with rolling rotor of discharge capacity |
| CN110821836A (en) * | 2019-10-24 | 2020-02-21 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor variable-capacity structure, compressor, air conditioner and control method |
| CN111954761A (en) * | 2018-03-27 | 2020-11-17 | 东芝开利株式会社 | Rotary compressor and refrigeration cycle device |
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