CN206221256U - Rotary compressor and the refrigeration system with it - Google Patents

Abstract

The utility model discloses a kind of rotary compressor and the refrigeration system with it, rotary compressor is driven by the electric-control system of no electrolytic capacitor, it includes housing, motor and compression mechanism, electric-control system includes main circuit and control circuit, installing space is limited in housing, motor is located in installing space, motor includes stator and is located at stator interior and rotatable rotor, rotor is provided with the rotor steam vent through its height, the top and/or bottom of rotor are provided with end plate, at least one end plate covers rotor steam vent, compression mechanism includes cylinder, base bearing and bent axle, base bearing is located on cylinder, bent axle sequentially passes through rotor, base bearing and cylinder.Because end plate can cover rotor steam vent, gaseous coolant directly cannot arrange the top to installing space from the middle part of installing space by rotor steam vent, middle part and top such that it is able to avoid installing space produce the gaseous coolant of same frequency pulsation, can reduce noise, improving energy efficiency.

Description

Rotary compressor and the refrigeration system with it

Technical field

The utility model is related to Compressor Technology field, more particularly to a kind of rotary compressor and with the rotation The refrigeration system of formula compressor.

Background technology

At present, for most of compressor, design passage is advantageous for compressor air-discharging on rotor, therefore The upper and lower end plate of rotor have avoidance hole can ventilate.Pulsed gas that the pump housing is produced are by rotor vent holes and stator, rotor Gap, drains into housing upper space.But during for muffler steam vent in centre or near centre, the gas that the pump housing is produced can be directly Connect and discharged by rotor vent holes, due to without obstruct and abatement, the gas in housing upper space and the gas in housing central section space Know from experience the gas for producing same frequency pulsation, when condition is suitable, the pulsed gas of this same frequency can form vibration frequency and exist Pulsations in the range of 1000Hz~1250Hz；Because rotor core has versatility in itself, and this noise is specific Condition just can be abnormal prominent, if abating the noise the partial noise by removing rotor vent holes, needs to re-replace rotor Fabrication of iron core mould, can so cause huge difficulty, it is clear that unrealistic to cost.The partial noise cannot be by Sound-proof material simultaneously Eliminate, especially when the fluctuation of the DC pulse moving voltage of motor operation in driving compressor is more notable, noise is showed more Substantially, Consumer's Experience is had a strong impact on.It is therefore desirable to existing compressor arrangement and it is automatically controlled optimize, reduce noise.

Utility model content

The utility model is intended at least solve to a certain extent one of technical problem in above-mentioned technology.Therefore, this reality With a kind of rotary compressor that can effectively reduce noise and improving energy efficiency of new proposition.

The utility model further proposes a kind of refrigeration system.

According to the rotary compressor of the utility model one side, driven by the electric-control system of no electrolytic capacitor, the rotation Rotary compressor includes housing, motor and compression mechanism, and the electric-control system includes main circuit and control circuit, wherein, it is described Installing space is limited in housing, the motor is located in the installing space, the motor include stator and be located at it is described fixed Sub internal and rotatable rotor, the rotor is provided with the rotor steam vent through its height, the top of the rotor and/or Bottom is provided with end plate, and end plate described at least one covers the rotor steam vent, the compression mechanism include cylinder, base bearing and Bent axle, the base bearing is located on the cylinder, and the bent axle sequentially passes through the rotor, the base bearing and the cylinder； The main circuit includes the inverter that rectifier bridge, power supply unit are connected with the motor, and the rectifier bridge is used for the friendship to being input into Stream electricity carries out rectification, and said supply unit is used to export the first Rectified alternating current and the second direct current, and absorbs the motor hair The energy produced when electric, first Rectified alternating current is used to supply the inverter, and second direct current is used to supply institute Control circuit is stated, the control circuit is used to control the inverter to drive the motor, wherein, first pulsating direct current The maximum voltage of electricity is more than the twice of its minimum voltage.

According to rotary compressor of the present utility model, driven by the electric-control system of no electrolytic capacitor, can substantially reduced into This, and the energy produced during electric power generation can be absorbed to prevent overvoltage, and the voltage pulsation of the first Rectified alternating current causes Noise can obtain effectively suppression, i.e., be provided with end plate by the top and/or bottom of rotor, end plate can cover rotor exhaust Hole, gaseous coolant directly cannot arrange top to installing space by rotor steam vent from the middle part of installing space, such that it is able to Avoid the middle part and top of installing space from producing the gaseous coolant of same frequency pulsation, and then the gaseous state of same frequency pulsation can be avoided The pulsations that refrigerant is produced, can lift the comfortableness of the refrigeration system with the rotary compressor.

In addition, can also have following distinguishing feature according to rotary compressor of the present utility model：

Further, said supply unit includes：Acceptor of energy, the acceptor of energy includes storage capacitor；DC-DC Converter, the DC-DC converter is connected to the two ends of the storage capacitor, and the DC-DC converter is used to exporting described the Two direct currents；Pulsating volage offer portion, the pulsating volage offer portion receives the output voltage of the rectifier bridge, and exports described First Rectified alternating current is to the inverter.

Wherein, the acceptor of energy also includes：First diode, the anode of first diode and the pulsation electricity The positive terminal in pressure offer portion is connected；Absorption resistance, one end of the absorption resistance is connected with the negative electrode of first diode, institute The other end for stating absorption resistance is connected with one end of the storage capacitor, the other end of the storage capacitor and the pulsating volage The negative pole end in offer portion is connected.

Preferably, being also associated between the first input end of the rectifier bridge and an output end of the alternating current can Control switch, the gate-controlled switch is also included the second diode and second resistance by the control circuit control, said supply unit, The anode of second diode is connected with an output end of the alternating current, the negative electrode of second diode and described One end of two resistance is connected, and the other end of the second resistance is connected with the storage capacitor, second diode and second Resistance is used to be charged to the storage capacitor when the gate-controlled switch disconnects.

On the one hand, the end plate includes being located at the upper head plate of the rotor top, and the upper head plate covers the rotor row Stomata.

On the other hand, the end plate includes being located at the bottom plate of the rotor bottom, and the bottom plate covers the rotor Steam vent.

Specifically, the base bearing includes main shaft part and is centered around the flange portion of main shaft part outside setting, the method Blue portion is located on the upper surface of the cylinder, by the lower end of the motor, the upper end of the flange portion and the housing The spatial volume surrounded between wall is V1, and the capacity of the rotary compressor is V0, wherein V1/V0≤1.89.

Additionally, the rotary compressor also includes muffler, the muffler is located on the base bearing, the noise reduction Utensil has the intercommunicating pore connected with the installing space, between the center of the intercommunicating pore and the rotation axis of the bent axle away from From the distance between the center more than or equal to the rotor steam vent and rotation axis of the bent axle.

Wherein, the muffler includes internal layer muffler and outer layer muffler, and the internal layer muffler is located at the main shaft Hold, the outer layer muffler cover is located at the outside of the internal layer muffler, and the internal layer muffler is provided with interior intercommunicating pore, The outer layer muffler is provided with outer intercommunicating pore, wherein between the center of the outer intercommunicating pore and the rotation axis of the bent axle Center and the rotation axis of the bent axle the distance between of the distance more than or equal to the rotor steam vent.

According to the refrigeration system of the utility model another aspect, including above-mentioned rotary compressor.

According to refrigeration system of the present utility model, including above-mentioned rotary compressor, due to above-mentioned rotary compression Machine is driven by the electric-control system of no electrolytic capacitor, can substantially reduce cost, and can absorb the energy that is produced during electric power generation with Overvoltage is prevented, and the noise that the voltage pulsation of the first Rectified alternating current causes can obtain effectively suppression, i.e., at the top of rotor And/or bottom is provided with end plate, end plate can cover rotor steam vent, and gaseous coolant cannot directly by rotor steam vent from installation The top to installing space is arranged at the middle part in space, and the middle part and top such that it is able to avoid installing space produce same frequency pulsation Gaseous coolant, and then the pulsations of the gaseous coolant generation of same frequency pulsation can be avoided, can be lifted rotary with this The comfortableness of the refrigeration system of compressor.

Additional aspect of the present utility model and advantage will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined Become substantially and be readily appreciated that, wherein：

Figure 1A is the sectional view of the rotary compressor according to the utility model one embodiment；

Figure 1B is the circuit diagram of the electric-control system of the rotary compressor according to the utility model one embodiment；

Fig. 2 is according to second sectional view of the rotary compressor of embodiment of the utility model；

Fig. 3 is the upward view of the rotor for being provided with bottom plate；

Fig. 4 is the partial sectional view of the rotary compressor according to the utility model embodiment.

Reference：

Rotary compressor 100；

Housing 10；Installing space 11；

Motor 20；Stator 21；Rotor 22；Rotor steam vent 23；Upper head plate 24；Bottom plate 25；The lower surface 20a of motor；

Compression mechanism 30；Cylinder 31；The upper surface 31a of cylinder；Base bearing 32；Main shaft part 32a；Flange portion 32b；Bent axle 33；

Muffler 40；Internal layer muffler 41；Interior intercommunicating pore 41a；Outer layer muffler 42；Outer intercommunicating pore 42a；

Electric-control system 200：

Main circuit 300；Control circuit 400；

Rectifier bridge 301；Power supply unit 302；Inverter 303.

Specific embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng The embodiment for examining Description of Drawings is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.

In description of the present utility model, it is to be understood that term " " center ", " on ", D score, "front", "rear", " top ", " bottom ", " interior ", " outward ", etc. instruction orientation or position relationship be, based on orientation shown in the drawings or position relationship, to be only Described with simplified for the ease of description the utility model, must had rather than the device or element for indicating or implying meaning specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.Additionally, term " the One ", " second " is only used for describing purpose, and it is not intended that indicating or implying relative importance or implicit indicate indicated The quantity of technical characteristic.Thus, " first " is defined, one or more can be expressed or be implicitly included to the feature of " second " Multiple this feature.In description of the present utility model, " multiple " is meant that two or more, unless otherwise clearly specific Restriction.

, it is necessary to explanation, unless otherwise clearly defined and limited, term " is pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly Connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two element internals connection or two The interaction relationship of element.For the ordinary skill in the art, above-mentioned term can as the case may be understood Concrete meaning in the utility model.

Below with reference to the accompanying drawings the rotary compressor 100 according to the utility model embodiment is described in detail.

With reference to as shown in Figure 1A, Figure 1B and Fig. 2, the rotary compressor 100 according to the utility model embodiment is by without electricity The electric-control system 200 for solving electric capacity drives, and rotary compressor 100 may include housing 10, motor 20, compression mechanism 30, automatically controlled system System 200 includes main circuit 300 and control circuit 400.

With reference to as shown in Figure 1A and Fig. 2, installing space 11 is limited in housing 10, motor 20 and compression mechanism 30 are arranged on In installing space 11, motor 20 includes stator 21 and is located at the inside of stator 21 and rotatable rotor 22, and rotor 22 is provided with and passes through Wear the rotor steam vent 23 of the height (i.e. length of the rotor 22 on the above-below direction shown in Figure 1A) of rotor 22, the top of rotor 22 Portion and/or bottom are provided with end plate, at least one end plate capping rotor steam vent 23.

The end plate referred to as upper head plate 24 at the top of rotor 22 is provided with, the end plate for being arranged on the bottom of rotor 22 is bottom plate 25.The top and bottom of rotor 22 can simultaneously be provided with tip plate configurations, or the top and bottom of rotor 22 and set There are tip plate configurations.Alternatively, in example as shown in Figure 1A, the top of rotor 22 is provided with upper head plate 24, and the bottom of rotor 22 sets There is bottom plate 25, bottom plate 25 can cover rotor steam vent 23；Or as shown in Fig. 2 the top of rotor 22 is provided with upper head plate 24, the bottom of rotor 22 is provided with bottom plate 25, and bottom plate 25 can cover rotor steam vent 23；Or alternatively, upper head plate 24 Rotor steam vent 23 can be simultaneously covered with bottom plate 25.

As shown in figure 4, due to end plate capping rotor steam vent 23, when gaseous coolant flows out from compression mechanism 30, system Cryogen can travel up to the top of installing space 11 by the gap between stator 21 and rotor 22, such that it is able to pass through shell Steam vent on body 10 is discharged from rotary compressor 100.Thus, gaseous coolant cannot directly by rotor steam vent 23 from peace The top to installing space 11 is arranged at the middle part in dress space 11, and the middle part and top such that it is able to avoid installing space 11 are produced with frequency The gaseous coolant of rate pulsation, and then the pulsations of the gaseous coolant generation of same frequency pulsation can be avoided, can be lifted has The comfortableness of the refrigeration system of the rotary compressor 100.

As shown in Figure 1A and Fig. 2, compression mechanism 30 includes cylinder 31, base bearing 32 and bent axle 33, and base bearing 32 is located at gas On cylinder 31, bent axle 33 sequentially passes through rotor 22, base bearing 32 and cylinder 31.

With reference to shown in Figure 1B, main circuit 300 includes the inverter that rectifier bridge 301, power supply unit 302 are connected with motor 20 303, rectifier bridge 301 is used to carry out rectification to the alternating current being input into, and power supply unit 302 is used to exporting the first Rectified alternating current and the Two direct currents, and the energy produced when motor 20 generates electricity is absorbed, the first Rectified alternating current is used to supply inverter 303, and second is straight Stream electricity is used for supply control circuit 400, and control circuit 400 is used to control inverter 303 with motor 20, wherein, the first arteries and veins It is more than the twice of its minimum voltage to move galvanic maximum voltage.

According to one embodiment of the present utility model, as shown in Figure 1B, rectifier bridge 301 can be made up of four diodes Full bridge rectifier, inverter 303 can be the three-phase inverting circuit being made up of two switching tubes, and power supply unit 302 includes： Acceptor of energy 3021, DC-DC converter 3022 and pulsating volage offer portion 3023, acceptor of energy 3021 include storage capacitor Cs, DC-DC converter 3022 is connected to the two ends of storage capacitor Cs, DC-DC converter 3022 be used to exporting the second direct current with Supply control circuit 400, pulsating volage offer portion 3023 receives the output voltage of rectifier bridge 301, and exports the first pulsating direct current Electricity is to inverter 303.

Wherein, the first Rectified alternating current is forceful electric power, and the second direct current is light current, and power supply unit 302 is also to forceful electric power and light current It is effectively isolated.

Specifically, in one embodiment of the present utility model, as shown in Figure 1B, acceptor of energy 3021 also includes：The The anode of one diode Ds and absorption resistance Rs, the first diode Ds is connected with the positive terminal in pulsating volage offer portion 3023, inhales The one end for receiving resistance Rs is connected with the negative electrode of the first diode Ds, the other end of absorption resistance Rs and one end phase of storage capacitor Cs Even, the other end of storage capacitor Cs is connected with the negative pole end in pulsating volage offer portion 3023.

Also, in a preferred embodiment of the present utility model, in first input end and the alternating current of rectifier bridge 301 Gate-controlled switch S such as relays are also associated between one output end, the controlled circuits 400 of gate-controlled switch S are controlled, power supply unit A 302 output end phases of the anode with alternating current for also including the second diode Dss and second resistance Rss, the second diode Dss Even, the negative electrode of the second diode Dss is connected with one end of second resistance Rss, the other end and the storage capacitor Cs of second resistance Rss It is connected, the second diode Dss and second resistance Rss is used to be charged to storage capacitor Cs when gate-controlled switch S disconnects, it is ensured that control Circuit 400 can obtain electric working on.

Therefore, in embodiment of the present utility model, rotary compressor is driven by the electric-control system of no electrolytic capacitor, can The energy produced to substantially reduce cost, and when can absorb electric power generation by acceptor of energy, such that it is able to prevent electricity Pressure, and the noise that the voltage pulsation of the first Rectified alternating current causes can be had by the structure setting of above-mentioned rotary compressor Effect suppresses.

In sum, the rotary compressor 100 according to the utility model embodiment, by the electric-control system of no electrolytic capacitor Drive, cost can be substantially reduced, and the energy that is produced during electric power generation can be absorbed to prevent overvoltage, and the first pulsating direct current The noise that the voltage pulsation of electricity causes can obtain effectively suppression, i.e., be provided with end plate by the top and/or bottom in rotor 22, hold Plate can cover rotor steam vent 23, and gaseous coolant cannot be directly (electric from the middle part of installing space 11 by rotor steam vent 23 Space between machine 20 and base bearing 22) top (superjacent air space of motor 20) to installing space 11 is arranged, such that it is able to avoid The middle part of installing space 11 and top produce the gaseous coolant of same frequency pulsation, and then the gaseous state that same frequency is pulsed can be avoided cold The pulsations that matchmaker produces, can lift the comfortableness of the refrigeration system with the rotary compressor 100.

In some examples of the present utility model, the shape of rotor steam vent 23 can be annular, specifically, rotor exhaust Hole 23 overlaps with the pivot of bent axle 33.Correspondingly, end plate is also annular, and the end plate of annular has endoporus, its endoporus Radius can be less than or equal to the distance between the internal face of rotor steam vent 23 and the rotation axis of bent axle 33.Such as Figure 1A institutes Show, the distance between rotation axis of the radius r2 of the endoporus of bottom plate 25 and the internal face of rotor steam vent 23 and bent axle 33 L Meet relational expression：r2≤L.As shown in Fig. 2 the internal face and bent axle of the radius r1 of the endoporus of upper head plate 24 and rotor steam vent 23 The distance between 33 rotation axis L meets relational expression：r1≤L.The internal face of rotor steam vent 23 refers to neighbouring bent axle 33 Rotation axis wall.Thus, by rationally setting the radius of the endoporus of end plate, can cause that end plate covers rotor and arranges completely Stomata 23, such that it is able to effectively reduce the noise of rotary compressor 100.

In other examples of the present utility model, the shape of rotor steam vent 23 can also be other shapes, for example, turn Sub- steam vent 23 can be other than ring type, and the floor projection of such as rotor steam vent 23 is shaped as circle, ellipse, polygon, no Regular shape etc..The number of rotor steam vent 23 is arbitrary, and can be arranged in any position of rotor 22.Correspondingly, hold The structure of plate can also be other than ring type, as long as end plate can cover rotor steam vent 23.

Alternatively, as shown in Figure 1A and Fig. 2, base bearing 32 includes main shaft part 32a and is centered around the setting of main shaft part 32a outsides Flange portion 32b, flange portion 32b is located on the upper surface 31a of cylinder 31, by the lower surface 20a of motor 20, flange portion 32b The spatial volume surrounded between the inwall of upper surface and housing 10 is V1, and the capacity of rotary compressor 100 is V0, its Middle V1/V0≤1.89.By reasonable installation space volume V1, the middle part from the row of compression mechanism 30 to installing space 11 can be adjusted Gaseous coolant flow direction, the flow velocity of the gaseous coolant for flowing to rotor steam vent 23 can be slowed down at least to some extent, can be with Be conducive to gaseous coolant that the gap between rotor 22 and stator 21 is flowed to from the middle part of installing space 11.

According to a preferred embodiment of the present utility model, rotary compressor 100 can also include muffler 40, noise reduction Device 40 is located on base bearing 32, and muffler 40 has the intercommunicating pore connected with installing space 11, center and the bent axle 33 of intercommunicating pore The distance between rotation axis can be more than or equal between the center of rotor steam vent 23 and the rotation axis of bent axle 33 Distance.By rationally setting the relation between above-mentioned distance, guiding gaseous coolant from peace can be conducive at least to some extent The gap that the middle part in space 11 is flowed between stator 21 and rotor 22 is filled, the flow noise of gaseous coolant can be advantageously reduced, The noise reduction of rotary compressor 100 can be lifted.

In some specific examples of the present utility model, as shown in Figure 1A and Fig. 2, muffler 40 can include internal layer noise reduction Device 41 and outer layer muffler 42, internal layer muffler 41 are located on base bearing 32, and outer layer muffler 42 is located at internal layer muffler 41 Outside, and internal layer muffler 41 is provided with interior intercommunicating pore 41a, and outer layer muffler 42 is provided with outer intercommunicating pore 42a.

Alternatively, in example as described in Figure 2, between the center of outer intercommunicating pore 42a and the rotation axis of bent axle 33 away from The distance between rotation axis from the center more than or equal to rotor steam vent 23 and bent axle 33.It is understood that in gas In the flow process of state refrigerant, flowed into internal layer muffler 41 from the gaseous coolant of the discharge of compression mechanism 30, then disappeared from internal layer Interior intercommunicating pore 41a on sound device 41 flows into outer layer muffler 42, then the outer intercommunicating pore 42a flow direction installations from outer layer muffler 42 The middle part in space 11.Thus, outer intercommunicating pore 42a can guide gaseous coolant flowing into installing space 11 at least to some extent The gap between stator 21 and rotor 22 is flowed to behind middle part, such that it is able to lift the noise reduction of rotary compressor 100.It is optional Ground, in example as shown in Figure 1A, the axis of outer intercommunicating pore 42a can be arranged concentrically with the rotation axis of bent axle 33.

In some embodiments of the present utility model, as shown in Fig. 2 the axis of outer intercommunicating pore 42a can be with interior intercommunicating pore The axis of 41a is concentric.Thus, after refrigerant gas are discharged from internal layer muffler 41, internal layer muffler 41 and outer layer are entered into In space between muffler 41, outer layer muffler 42 can be more smoothly discharged.

In embodiment of the present utility model, outer layer muffler 42 can be one and positioned at the outer of internal layer muffler 41 Side, the quantity of internal layer muffler 41 can be any, for example, can be one or can also be multiple, as long as internal layer noise reduction The arrangement of device 41 and outer layer muffler 42 can allow refrigerant gas from after the discharge of cylinder 31, by the sound deadening of muffler Afterwards, drain into installing space 11.

Additionally, the utility model embodiment also proposed a kind of refrigeration system, it includes above-mentioned rotary compressor 100。

According to the refrigeration system of the utility model embodiment, including above-described embodiment rotary compressor 100, due to upper The rotary compressor 100 for stating embodiment is driven by the electric-control system of no electrolytic capacitor, can substantially reduce cost, and can absorb The energy produced during electric power generation is to prevent overvoltage, and the noise that the voltage pulsation of the first Rectified alternating current causes can be had Effect suppresses, i.e., be provided with end plate at the top and/or bottom of rotor 22, and end plate can cover rotor steam vent 23, gaseous coolant without Method directly arranges top to installing space 11 by rotor steam vent 23 from the middle part of installing space 11, such that it is able to avoid installing The middle part in space 11 and top produce the gaseous coolant of same frequency pulsation, and then the gaseous coolant that same frequency is pulsed can be avoided to produce Raw pulsations, can lift the comfortableness of the refrigeration system with the rotary compressor 100.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example are described Structure, material or feature are contained at least one embodiment of the present utility model or example.In this manual, to above-mentioned art The schematic representation of language is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or Person's feature can in an appropriate manner be combined in one or more any embodiments or example.

While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that： In the case where principle of the present utility model and objective is not departed from various changes, modification, replacement can be carried out to these embodiments And modification, scope of the present utility model limits by claim and its equivalent.

Claims (10)

1. a kind of rotary compressor, it is characterised in that the rotary compressor is driven by the electric-control system of no electrolytic capacitor, The rotary compressor includes housing, motor and compression mechanism, and the electric-control system includes main circuit and control circuit, its In,

Installing space is limited in the housing, the motor is located in the installing space, the motor includes stator and sets In the stator interior and rotatable rotor, the rotor is provided with the rotor steam vent through its height, the rotor Top and/or bottom are provided with end plate, and end plate described at least one covers the rotor steam vent, and the compression mechanism includes gas Cylinder, base bearing and bent axle, the base bearing are located on the cylinder, and the bent axle sequentially passes through the rotor, the base bearing With the cylinder；

The main circuit includes the inverter that rectifier bridge, power supply unit are connected with the motor, and the rectifier bridge is used for input Alternating current carry out rectification, said supply unit is used to export the first Rectified alternating current and the second direct current, and absorbs the electricity The energy that machine is produced when generating electricity, first Rectified alternating current is used to supply the inverter, and second direct current is used to supply To the control circuit, the control circuit is used to control the inverter to drive the motor, wherein, first pulsation Galvanic maximum voltage is more than the twice of its minimum voltage.

2. rotary compressor according to claim 1, it is characterised in that said supply unit includes：

Acceptor of energy, the acceptor of energy includes storage capacitor；

DC-DC converter, the DC-DC converter is connected to the two ends of the storage capacitor, and the DC-DC converter is used for defeated Go out second direct current；

Pulsating volage offer portion, the pulsating volage offer portion receives the output voltage of the rectifier bridge, and exports described first Rectified alternating current is to the inverter.

3. rotary compressor according to claim 2, it is characterised in that the acceptor of energy also includes：

First diode, the anode of first diode is connected with the positive terminal in the pulsating volage offer portion；

Absorption resistance, one end of the absorption resistance is connected with the negative electrode of first diode, the absorption resistance it is another End is connected with one end of the storage capacitor, the negative pole end phase in the other end of the storage capacitor and the pulsating volage offer portion Even.

4. rotary compressor according to claim 2, it is characterised in that first input end and institute in the rectifier bridge Gate-controlled switch is also associated between an output end for stating alternating current, the gate-controlled switch is described by the control circuit control Power supply unit also includes the second diode and second resistance, the anode of second diode and an output of the alternating current End is connected, and the negative electrode of second diode is connected with one end of the second resistance, the other end of the second resistance and institute State storage capacitor to be connected, second diode and second resistance are used for when the gate-controlled switch disconnects to the storage capacitor Charge.

5. the rotary compressor according to any one of claim 1-4, it is characterised in that the end plate includes being located at institute The upper head plate of rotor top is stated, the upper head plate covers the rotor steam vent.

6. the rotary compressor according to any one of claim 1-4, it is characterised in that the end plate includes being located at institute The bottom plate of rotor bottom is stated, the bottom plate covers the rotor steam vent.

7. rotary compressor according to claim 1, it is characterised in that the base bearing includes main shaft part and is centered around The flange portion that main shaft part outside is set, the flange portion is located on the upper surface of the cylinder, by the lower end of the motor, The spatial volume surrounded between the inwall of the upper end of the flange portion and the housing is V1, the rotary compressor Capacity is V0, wherein V1/V0≤1.89.

8. rotary compressor according to claim 1, it is characterised in that also including muffler, the muffler is located at On the base bearing, the muffler has the intercommunicating pore that is connected with the installing space, the center of the intercommunicating pore with it is described The distance between rotation axis of bent axle more than or equal to center and the bent axle of the rotor steam vent rotation axis it Between distance.

9. rotary compressor according to claim 8, it is characterised in that the muffler includes internal layer muffler and outer Layer muffler, the internal layer muffler is located on the base bearing, and the outer layer muffler cover is located at the internal layer muffler Outside, and the internal layer muffler is provided with interior intercommunicating pore, the outer layer muffler is provided with outer intercommunicating pore, wherein the outer company The distance between the center of through hole and rotation axis of the bent axle more than or equal to the rotor steam vent center with it is described The distance between rotation axis of bent axle.

10. a kind of refrigeration system, it is characterised in that including the rotary compressor according to any one of claim 1-9.