CN207004813U

CN207004813U - Rotary compressor and there is its refrigeration system

Info

Publication number: CN207004813U
Application number: CN201720111328.XU
Authority: CN
Inventors: 汤立宽; 巫华龙
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2017-02-06
Filing date: 2017-02-06
Publication date: 2018-02-13
Anticipated expiration: 2027-02-06

Abstract

The utility model discloses a kind of rotary compressor and there is its refrigeration system, rotary compressor includes：Housing and compression mechanism.Compression mechanism includes：First, second compression member and variable capacity control mechanism, first air intake passage, middle pressure jet channel connects with the first compression member, second air intake passage connects with the second compression member, the both ends of variable capacity control mechanism respectively with middle pressure jet channel, housing back pressure cavity connects, with the slide plate back pressure cavity and the first air intake passage for driving the slide plate back pressure cavity of the slide plate back pressure cavity for selectively connecting the second compression member and the first compression member under the differential pressure action of variable capacity control mechanism by being applied to or connecting the second compression member, with two compression members all operations when slide plate back pressure cavity connects with housing back pressure cavity, when being connected with the first air intake passage, only the first compression member is run.The rotary compressor can realize the voluntarily switching of single twin-tub operation according to the change of operating condition, simple in construction, cost is relatively low.

Description

Rotary compressor and there is its refrigeration system

Technical field

Compressor Technology field is the utility model is related to, in particular to a kind of rotary compressor and there is it Refrigeration system.

Background technology

In correlation technique, with the continuous exhaustion of earth resource and the deterioration of environment, high energy efficiency, low cost are The target that air conditioner, refrigerator etc. are constantly pursued.

In some application scenarios such as low temperature environment, the evaporating temperature of rotary compressor reduces, and can cause freeze cycle system The ability of system reduces, and causing the degradation of ordinary single-stage rotary compressor can not use, using Large Copacity air injection enthalpy-increasing Compressor, can effectively lift the ability of refrigerating circulation system, but twin-tub jet compressor when load is less still Run using twin-tub so that running efficiency reduces.The external electromagnetic component of existing twin-tub capacity variable type compressor generally use enters Row single cylinder runs the switching with twin-tub operation, and cost is higher and takes larger installing space.

Utility model content

The utility model is intended to one of technical problem at least solving in correlation technique to a certain extent.Therefore, this reality With it is new propose it is a kind of can be realized according to the change of operating condition single cylinder operation twin-tub run between voluntarily switching, into This relatively low rotary compressor.

According to the rotary compressor of the utility model embodiment, it can realize that single cylinder is run according to the change of operating condition Voluntarily switching between being run with twin-tub, so that cost is relatively low.

The utility model also proposes a kind of refrigerating plant with above-mentioned rotary compressor.

Included according to the rotary compressor of the utility model first aspect embodiment：Housing and compression mechanism, the shell There is housing back pressure cavity in vivo.The compression mechanism is located in the housing, is led in the compression mechanism formed with the first air-breathing Road, the second air intake passage and middle pressure jet channel, the compression mechanism include：First compression member, the second compression member and Variable capacity control mechanism.First air intake passage, medium pressure jet channel connected with first compression member think it is described First compression member supplies, and second air intake passage connects with second compression member thinks that second compression member supplies Gas, the slide plate back pressure cavity of second compression member selectively with the slide plate back pressure cavity of first compression mechanism or described One air intake passage connects, wherein, the slide plate back pressure of the slide plate back pressure cavity of second compression member and first compression mechanism When chamber connects, first compression member and second compression member are all run, the slide plate back of the body of second compression member Pressure chamber when connect with first air intake passage, run by only described first compression member, one end of the variable capacity control mechanism and Medium pressure jet channel connects, and the other end of the variable capacity control mechanism connects with the housing back pressure cavity, with by applying It is added under the differential pressure action of the variable capacity control mechanism and drives the variable capacity control mechanism selectively to connect second compression The slide plate back pressure cavity of the slide plate back pressure cavity of part and first compression mechanism connects the slide plate of second compression member and carried on the back Press chamber and first air intake passage.

Elastic component is provided with according to some embodiments of the utility model, in the variable capacity control mechanism and slides core body, institute State the action critical pressure for sliding core body and the differential pressure action is in opposite direction, when the action of the pressure differential deltap P≤slip core body During critical pressure P1, the variable capacity control mechanism connects slide plate back pressure cavity and the described first compression of second compression member The slide plate back pressure cavity of mechanism；When the pressure differential deltap P ＜ slide the action critical pressure P1 of core body, the variable capacity control mechanism connects Lead to the slide plate back pressure cavity of second compression member and first air intake passage.

According to some embodiments of the utility model, the variable capacity control mechanism includes：Dividing plate, the dividing plate is positioned at described Between first compression member and second compression member, the dividing plate has installation cavity；The slip core body is provided with low pressure Gas inlet pathways and gases at high pressure introduction passage, the slip core body are slidably disposed in the installation cavity, the slip One end of core body is connected by elastic component with the dividing plate and medium pressure jet channel is connected with the installation cavity with by middle pressure Gas is guided housing back pressure cavity described in the end into and connected with the installation cavity to guide gases at high pressure into the slip core body another End；As the action critical pressure P1 of pressure Pd- medium pressure gas pressure Pm≤slip core body of housing back pressure cavity, the high pressure gas Body introduction passage and the installation cavity are by the slide plate of the slide plate back pressure cavity of first compression mechanism and second compression member Back pressure cavity connects；When the pressure Pd- medium pressure gas pressure Pm ＜ of housing back pressure cavity slide the action critical pressure P1 of core body, institute Low-pressure gas introduction passage and the installation cavity are stated by first air intake passage and the slide plate back pressure of second compression member Chamber connects.

According to some embodiments of the utility model, the installation cavity includes：Cavity volume is run, the slip core body is slidably Ground is arranged in the operation cavity volume, and one end of the elastic component is connected with the operation cavity volume and the other end of the elastic component With it is described slip core body be connected, it is described run cavity volume open at one end and connected with the housing back pressure cavity；First gas passage, One end of the first gas passage connects with medium pressure jet channel, the other end of the first gas passage and the fortune The other end connection of row cavity volume；Cavity volume and institute are run in second gas passage, the both ends of the second gas passage with described respectively State the connection of the first air intake passage；Cavity volume and institute are run in third gas passage, the both ends of the third gas passage with described respectively State the slide plate back pressure cavity connection of the second compression member；And the 4th gas passage, the both ends of the 4th gas passage respectively with The operation cavity volume connects with the slide plate back pressure cavity of first compression member；When the pressure Pd- medium pressure gas of housing back pressure cavity During the action critical pressure P1 of pressure Pm≤slip core body, the gases at high pressure introduction passage by the 4th gas passage with it is described The slide plate back pressure cavity connection of first compression member, and pass through third gas passage and the slide plate back pressure cavity of second compression member Connection；When the pressure Pd- medium pressure gas pressure Pm ＜ of housing back pressure cavity slide the action critical pressure P1 of core body, the low pressure Gas inlet pathways are connected by the second gas passage with first air intake passage, and pass through the third gas passage Connected with the slide plate back pressure cavity of second compression member.

According to some embodiments of the utility model, medium pressure jet channel is formed on the dividing plate, the dividing plate On be additionally provided with the 5th gas passage, first compression member is connected by the 5th gas passage with medium pressure jet channel.

According to some embodiments of the utility model, the length direction of medium pressure jet channel, described core body is slided The axial direction of length direction and the dividing plate is perpendicular, and the length of the length direction of medium pressure jet channel and the slip core body Spend angular separation α≤90 °.

According to some embodiments of the utility model, described at least one end for sliding core body is provided with cushion pad；And/or institute It is stating operation cavity volume to be provided with cushion pad with least one in slip core body both ends respectively relative both ends of the surface.

According to some embodiments of the utility model, in addition to sealing ring, the periphery wall for sliding core body, which is provided with, to be used In the seal groove for installing the sealing ring.

According to some embodiments of the utility model, in addition to：Slide plate keeper, the slide plate keeper are arranged in institute When stating the slide plate back pressure cavity of the second compression member and being connected with first air intake passage, the slide plate keeper and the slide plate knot Close to be positioned and made the slide plate to be accommodated in the vane slot of second compression member to slide plate, in the described second compression When the slide plate back pressure cavity of part connects with the housing high pressure chamber, the slide plate keeper takes off with the slide plate under differential pressure action From so that slide plate is only against on corresponding piston.

According to some embodiments of the utility model, the slide plate keeper is magnetic part, in second compression member Slide plate back pressure cavity when being connected with first air intake passage, the slide plate keeper and the slide plate magnetic attracting.

Included according to the rotary compressor rotary compressor of the utility model second aspect embodiment：Housing and compression Mechanism, the housing is interior to have housing back pressure cavity.The compression mechanism is located in the housing, in the compression mechanism formed with First air intake passage, the second air intake passage and middle pressure jet channel, the compression mechanism include：First compression member, the second pressure Contracting part and variable capacity control mechanism.First air intake passage, medium pressure jet channel and first compression member connect Pass to and supplied for first compression member；Second air intake passage connects with second compression member thinks described second Compression member is supplied, and the slide plate back pressure cavity of second compression member is selectively inhaled with the housing back pressure cavity or described first Gas passage connects, wherein, when the slide plate back pressure cavity of second compression member connects with the housing back pressure cavity, first pressure Contracting part and second compression member are all run, and the slide plate back pressure cavity of second compression member is led to first air-breathing When road connects, only described first compression member operation；One end of the variable capacity control mechanism connects with medium pressure jet channel, And the other end of the variable capacity control mechanism connects with the housing back pressure cavity, with by being applied to the variable capacity control mechanism Driven under differential pressure action the variable capacity control mechanism selectively connect the slide plate back pressure cavity of second compression member with it is described The slide plate back pressure cavity and first air intake passage of housing back pressure cavity or connection second compression member.

According to some embodiments of the utility model, elastic component, the slip core body are provided with the variable capacity control mechanism Action critical pressure and the differential pressure action it is in opposite direction, as the action critical pressure P1 of the pressure differential deltap P≤slip core body When, the variable capacity control mechanism connects the slide plate back pressure cavity of second compression member and the housing back pressure cavity；When the pressure When poor Δ P ＜ slide the action critical pressure P1 of core body, the variable capacity control mechanism connects the slide plate of second compression member Back pressure cavity and first air intake passage.

According to some embodiments of the utility model, the variable capacity control mechanism includes：Dividing plate, the dividing plate is positioned at described Between first compression member and second compression member, the dividing plate has installation cavity；Core body is slided, it is described to slide on core body Provided with low-pressure gas introduction passage and gases at high pressure introduction passage, the slip core body is slidably disposed in the installation cavity, Described one end for sliding core body is connected by elastic component with the dividing plate and medium pressure jet channel connects with the installation cavity Connected with guiding medium pressure gas into described in end housing back pressure cavity with the installation cavity to guide gases at high pressure into the slide cores The other end of body；As the action critical pressure P1 of pressure Pd- medium pressure gas pressure Pm≤slip core body of housing back pressure cavity, institute Gases at high pressure introduction passage and the installation cavity are stated by the housing back pressure cavity and the slide plate back pressure cavity of second compression member Connection；When the pressure Pd- medium pressure gas pressure Pm ＜ of housing back pressure cavity slide the action critical pressure P1 of core body, the low pressure Gas inlet pathways and the installation cavity connect first air intake passage with the slide plate back pressure cavity of second compression member.

According to some embodiments of the utility model, the installation cavity includes：Cavity volume is run, the slip core body is slidably Ground is arranged in the operation cavity volume, and one end of the elastic component is connected with the operation cavity volume and the other end of the elastic component With it is described slip core body be connected, it is described run cavity volume open at one end and connected with the housing back pressure cavity, the gases at high pressure Introduction passage is through the other end for sliding core body and is often connected with the housing back pressure cavity；First gas passage, described One end of one gas passage connects with medium pressure jet channel, the other end of the first gas passage and the operation cavity volume The other end connection；Cavity volume and described first is run in second gas passage, the both ends of the second gas passage with described respectively Air intake passage connects；And third gas passage, the both ends of the third gas passage respectively with the operation cavity volume and described The slide plate back pressure cavity connection of second compression member；When pressure Pd- medium pressure gas pressure Pm≤slip core body of housing back pressure cavity When acting critical pressure P1, the gases at high pressure introduction passage is directly connected with the housing back pressure cavity and led to by third gas Road connects with the slide plate back pressure cavity of second compression member；When the pressure Pd- medium pressure gas pressure Pm ＜ of housing back pressure cavity are slided During the action critical pressure P1 of dynamic core body, the low-pressure gas introduction passage passes through the second gas passage and described first Air intake passage connects, and is connected by the third gas passage with the slide plate back pressure cavity of second compression member.

According to the refrigeration system of the utility model third aspect embodiment, including：Described rotary compressor；Condensation Device, the refrigerant import of the condenser connect with the refrigerant exit of the compressor；First throttle device, the first throttle dress The refrigerant import put connects with the refrigerant exit of the condenser；Flash vessel, the refrigerant import of the flash vessel and described first The refrigerant exit connection of throttling arrangement, the flash vessel have middle pressure refrigerant exit, medium pressure refrigerant exit and medium pressure Jet channel connects；Second throttling device, the refrigerant import of the second throttling device and the refrigerant exit of the flash vessel connect Connect；And evaporator, the refrigerant import of the evaporator connect with the refrigerant exit of the second throttling device, the evaporator Refrigerant exit be connected with the refrigerant import of the compressor.

Brief description of the drawings

Fig. 1 is the schematic diagram according to the rotary compressor of the utility model first aspect embodiment.

Fig. 2 is the schematic diagram according to the rotary compressor of the utility model one embodiment.

Fig. 3 is the partial enlarged drawing A-1 in Fig. 2 at A (when twin-tub is run, first aspect embodiment).

Fig. 4 is the partial enlarged drawing A-2 in Fig. 2 at A (when single cylinder is run, first aspect embodiment).

Fig. 5 a are the schematic perspective views of the slip core body of Fig. 3 and the compressor of embodiment illustrated in fig. 4.

Fig. 5 b are the schematic cross-sectional views of the slip core body of Fig. 3 and the compressor of embodiment illustrated in fig. 4.

Fig. 6 be in Fig. 2 at A partial enlarged drawing A-3 (cross section of the passage portion of low pressure tap air channel is Long Circle, High-pressure bleed air passage can be connected by the 4th gas passage with the slide plate back pressure cavity of the second compression member).

Fig. 7 a are the schematic perspective views of the slip core body of the compressor of embodiment illustrated in fig. 6.

Fig. 7 b are the schematic cross-sectional views of the slip core body of the compressor of embodiment illustrated in fig. 6.

Fig. 8 is the partial schematic diagram according to the compression member of the utility model embodiment.

Fig. 9 is the schematic perspective view according to the dividing plate of the utility model embodiment.

Figure 10 is the schematic cross-sectional view along Fig. 9 center lines B-B.

Figure 11 is the schematic cross-sectional view along Fig. 9 center lines C-C.

Figure 12 is the schematic diagram according to the dividing plate of the utility model embodiment and the cylinder of the first compression member.

Figure 13 is the schematic diagram along the line D-D in Figure 12.

Figure 14 is the close-up schematic view at the E in Figure 13.

Figure 15 is the scheme of installation according to middle the pressure air jet pipe and variable capacity control mechanism of the utility model one embodiment.

Figure 16 is the scheme of installation according to middle the pressure air jet pipe and variable capacity control mechanism of the another embodiment of the utility model.

Figure 17 is the partial enlarged drawing A-4 in Fig. 2 at A (cushion pad is located at the both ends for sliding core body).

Figure 18 is that the schematic diagram that core body is connected with cushion pad is slided in Figure 17.

Figure 19 is the partial enlarged drawing A-5 in Fig. 2 at A (cushion pad is located in operation cavity volume).

Figure 20 is the partial enlarged drawing A-6 in Fig. 2 at A (slide cores are provided with sealing ring in vitro).

Figure 21 is the schematic diagram of sealing ring in embodiment illustrated in fig. 20.

Figure 22 is according to scheme of installation of the sealing ring of the utility model embodiment with sliding core body.

Figure 23 is the schematic diagram according to the rotary compressor of the utility model second aspect embodiment.

Figure 24 is the partial enlarged drawing A ' -1 (when twin-tub is run, second aspect embodiment) at A ' places in Figure 23.

Figure 25 is the partial enlarged drawing A ' -2 (when single cylinder is run, second aspect embodiment) at A ' places in Figure 23.

Figure 26 a are the schematic perspective views of the slip core body of the compressor of embodiment illustrated in fig. 24.

Figure 26 b are the schematic cross-sectional views of the slip core body of the compressor of embodiment illustrated in fig. 24.

Figure 27 is the schematic diagram according to the refrigeration system of the utility model third aspect embodiment.

Reference：

Rotary compressor 100, condenser 200, first throttle device 300, evaporator 400, flash vessel 500, the second section Stream device 600, refrigeration system 1000,

Housing 10, housing back pressure cavity 11,

First air intake passage T1, the second air intake passage T2, middle pressure jet channel T3,

First compression member 20, the slide plate 21 of the first compression member, the slide plate back pressure cavity 22 of the first compression member, the first pressure The cylinder 23 of contracting part, the piston 24 of the first compression member, the spring 25 of the first compression member,

Second compression member 30, the slide plate 31 of the second compression member, the slide plate back pressure cavity 32 of the second compression member, the second pressure The cylinder 33 of contracting part, the piston 34 of the second compression member,

Variable capacity control mechanism 40, dividing plate 41, installation cavity 411, run cavity volume 411a, first gas passage 411b, the second gas Body passage 411c, third gas passage 411d, the 4th gas passage 411e, the 5th gas passage 411f, slide core body 42, high pressure Gas inlet pathways 421, low-pressure gas introduction passage 422, seal groove 423, elastic component 43, cushion pad 44, sealing ring 45,

Slide plate keeper 50, fluid reservoir 60, middle pressure air jet pipe 70.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings.Below by The embodiment being described with reference to the drawings is exemplary, it is intended to for explaining the utility model, and it is not intended that new to this practicality The limitation of type.

It is described in detail referring to Fig. 1 to Figure 27 according to the rotary compressor of the utility model embodiment and with this The refrigeration system of compressor.

As depicted in figs. 1 and 2, included according to the rotary compressor of the utility model first aspect embodiment：Housing 10 And compression mechanism.Housing 10 has housing back pressure cavity 11, and compression mechanism includes：First compression member 20, the second compression member 30 And variable capacity control mechanism 40.

Compression mechanism is located in housing 10, in compression mechanism formed with the first air intake passage T1, the second air intake passage T2 and Middle pressure jet channel T3.First air intake passage T1, middle pressure jet channel T3 are connected with the first compression member 20 and are thought the first compression Part 20 supplies；Second air intake passage T2 connects with the second compression member 30 thinks that the second compression member 30 supplies, the second compression The slide plate back pressure cavity 32 of part 30 selectively connects with the air intake passage T1 of slide plate back pressure cavity 22 or first of the first compression member 20 It is logical.

Wherein, the slide plate back pressure cavity 32 of the second compression member 30 connects with the slide plate back pressure cavity 22 of the first compression member 20 When, the first compression member 20 and the second compression member 30 are all run；The slide plate back pressure cavity 32 and first of second compression member 30 When air intake passage T1 is connected, the slide plate back pressure cavity 32 of the second compression member 30 connects with the first air intake passage T1, the only first compression Part 20 is run.One end of variable capacity control mechanism 40 connects with middle pressure jet channel T3, and the other end of variable capacity control mechanism 40 with Housing back pressure cavity 11 connects, selectively to be connected by the pressure differential variable capacity control mechanism 40 for being applied to variable capacity control mechanism 40 The compression member 30 of slide plate back pressure cavity 22 or second of the compression member 20 of slide plate back pressure cavity 32 and first of logical second compression member 30 The air intake passage T1 of slide plate back pressure cavity 32 and first.

Specifically, " the slide plate back pressure cavity 32 and first that variable capacity control mechanism 40 connects the second compression member 30 is compressed for definition It is the first connected state during the slide plate back pressure cavity 22 " of part 20, " variable capacity control mechanism 40 connects the second compression member 30 for definition The air intake passage T1 " of slide plate back pressure cavity 32 and first be the second connected state, " variable capacity control mechanism 40 selectively connects second The slide plate of the compression member 30 of slide plate back pressure cavity 22 or second of the compression member 20 of slide plate back pressure cavity 32 and first of compression member 30 The air intake passage T1 " of back pressure cavity 32 and first refer to variable capacity control mechanism 40 can the first connected state and the second connected state it Between switch.

It is understood that middle pressure jet channel T3 is used for (including but not limited to flash vessel 500) outside compressor Medium pressure gas is introduced in the first compression member 20 to be compressed；First air intake passage T1 is used for the low pressure gas in fluid reservoir 60 Body is introduced in the first compression member 20 to be compressed, and the second air intake passage T2 is used to introduce the low-pressure gas in fluid reservoir 60 To be compressed in second compression member 30.

According to the rotary compressor of the utility model embodiment, by the way that medium pressure gas is introduced in the first compression member 20 To realize air injection enthalpy-increasing, the freeze cycle ability of compressor is improved, and by the medium pressure gas in middle pressure jet channel T3 and the Gases at high pressure in the slide plate back pressure cavity 22 of one compression member 20 are introduced in variable capacity control mechanism 40, in variable capacity control mechanism 40 Pressure difference changes (pressure difference is smaller during low load, and pressure difference is larger when height carries) according to the change of compressor operating operating mode.

Thus, variable capacity control mechanism 40 selectively connects the slide plate back pressure of the second compression member 30 in the presence of pressure difference Chamber 32 and the slide plate back pressure cavity 32 of the compression member 30 of slide plate back pressure cavity 22 or second of the first compression member 20 are led to the first air-breathing Road T1.When the slide plate back pressure cavity 32 of the second compression member 30 connects with the slide plate back pressure cavity 22 of the first compression member 20, second The slide plate of compression member 30 in the presence of the larger pressure difference in both ends setting in motion to realize the normal fortune of the second compression member 30 OK, now the first compression member 20 and the second compression member 30 are run；When the second compression member 30 slide plate back pressure cavity 32 with When first air intake passage T1 is connected, the pressure difference at the slide plate both ends of the second compression member 30 is smaller, is not enough to promote vane motion, because This second compression member 30 is not run, and now only the first compression member 20 is run.

So, variable capacity control mechanism 40 can be just realized according to the change of operating condition between single cylinder operation and twin-tub operation Voluntarily switching, with it is low load operating mode under single cylinder operation, height carry operating mode under twin-tub run, not only save the energy, improve pressure The operational efficiency of contracting machine, and compared to conventional positive displacement compressor without external pressure switching solenoid valve and connecting pipings, cost and Installing space more saves.

Shown in reference picture 3, elastic component 43 is provided with certain embodiments, in variable capacity control mechanism 40 and slides core body 42, Elastic component 43 to compress power in opposite direction with differential pressure action.As the action critical pressure P1 of pressure differential deltap P≤slip core body 42, become Hold the slide plate back pressure cavity 22 that controlling organization 40 connects the compression member 20 of slide plate back pressure cavity 32 and first of the second compression member 30；When When pressure differential deltap P ＜ slide the action critical pressure P1 of core body 42, variable capacity control mechanism 40 connects the slide plate of the second compression member 30 The air intake passage T1 of back pressure cavity 32 and first.

Thus, the power of only supporting of pressure difference and elastic component 43 interacts so that variable capacity control mechanism 40 is in above two connected state Switch under state, and then realize that gases at high pressure enter the slide plate back pressure cavity 32 of the second compression member 30 under high load operating mode and then promotion is slided Piece 32 is often only against on piston, so that the second compression member 30 and the first compression member 20 are run；Low pressure gas under low load operating mode Body enters the slide plate back pressure cavity 32 of the second compression member 30 and then remains stationary as the second slide plate, and now the second compression member 30 is not Operation, only the first compression member 20 is run.

According to some embodiments of the utility model, as shown in figure 1, rotary compressor also includes slide plate keeper 50, Slide plate keeper 50 is arranged to when the slide plate back pressure cavity 32 of the second compression member 30 connects with the first air intake passage T1, and slide plate is fixed Position part 50 is combined with slide plate 31 to be positioned to slide plate 31 and slide plate 31 is accommodated in the vane slot of the second compression member 30, When the slide plate back pressure cavity 32 of the second compression member 30 connects with the slide plate back pressure cavity 22 of the first compression member 20, in differential pressure action Lower slide plate keeper 50 departs from slide plate 31 so that slide plate is only against on corresponding piston.

Further, slide plate keeper is magnetic part, in the air-breathing of slide plate back pressure cavity 32 and first of the second compression member 30 When passage T1 is connected, slide plate keeper 50 and the magnetic attracting of slide plate 31.

So, when the load of refrigeration system is larger (under low load operating mode), the pressure difference of gases at high pressure and medium pressure gas surpasses After crossing certain numerical value, slide core body 42 and be pressurized and extrude the set of elastic component 43, make the slide plate back pressure cavity 32 of the second compression member 30 With the connection of the slide plate back pressure cavity 22 of the first compression member 20, high pressure and second air intake passage of the slide plate 31 in slide plate back pressure cavity 32 Under the differential pressure action of T2 low pressure, the suction of slide plate keeper 50 is overcome often only to be supported with corresponding piston, so as to realize second The operation of compression member 30；(height is carried under operating mode), the pressure difference of gases at high pressure and medium pressure gas when refrigeration system load is smaller It is smaller, the set of core body 42 is slided, by sliding the interface channel on core body 42 and dividing plate 41, realizes the second compression member 30 Slide plate back pressure cavity connected with the first air intake passage T1, the both ends pressure difference of slide plate 31 is smaller, in the positioning action of slide plate keeper 50 Under, slide plate 31 departs from corresponding piston 34, and now the second compression member 30 does not work.

In a specific embodiment of the present utility model, as shown in figure 3, variable capacity control mechanism 40 includes：Dividing plate 41.Every For plate 41 between the first compression member 20 and the second compression member 30, dividing plate 41 has installation cavity 411, slides on core body 42 Provided with low-pressure gas introduction passage 422 and gases at high pressure introduction passage 421, slide core body 42 and be slidably disposed in installation cavity 411 It is interior, slide core body 42 one end be connected by elastic component 43 with dividing plate 41 and middle pressure jet channel T3 connected with installation cavity 411 with Guide medium pressure gas into the end, housing back pressure cavity 11 connects with installation cavity 411 slides the another of core body 42 so that gases at high pressure to be guided into One end.

As the action critical pressure P1 of pressure Pd- medium pressure gas pressure Pm≤slip core body 42 of housing back pressure cavity 11, Gases at high pressure introduction passage 421 and installation cavity 411 are by the compression member 30 of slide plate back pressure cavity 22 and second of the first compression member 20 Slide plate back pressure cavity 32 connect.The action that core body 42 is slided as the pressure Pd- medium pressure gas pressure Pm ＜ of housing back pressure cavity 11 is faced During boundary pressure P1, low-pressure gas introduction passage 422 and installation cavity 411 are by the first air intake passage T1 and the second compression member 30 Slide plate back pressure cavity 32 connects.

That is, when being run under compressor carries operating mode in height, act on the pressure difference slided on core body 42 and be more than or wait In compressing power, sliding core body 42 and resting in makes the slide plate back pressure cavity 22 of the first compression member 20 be introduced through installation cavity 411 and gas The first position (referring to Fig. 3, Fig. 5) that passage 421 is connected with the slide plate back pressure cavity 32 with the second compression member 30, when compression machine-cut Change under low load operating mode when running, act on the pressure difference slided on core body 42 and be less than and compress power, now slide core body 42 towards away from The direction of elastic component 43 move and rest in make the first air intake passage T1 through installation cavity 411 and low-pressure gas introduction passage 422 with The second place that the slide plate back pressure cavity 32 of second compression member 30 connects (referring to Fig. 4, Fig. 6).

Installation cavity 411 and the structure for sliding core body 42 can have multiple choices, such as in certain embodiments, such as Fig. 3 and Shown in Fig. 4, installation cavity 411 includes：Run cavity volume 411a, first gas passage 411b, second gas passage 411c, the 3rd gas Body passage 411d and the 4th gas passage 411e.

It is slidably disposed on as shown in figure 3, sliding core body 42 in operation cavity volume 411a, one end of elastic component 43 and operation The other end of cavity volume 411a connections and elastic component 43 is connected with sliding core body 42, operation cavity volume 411a open at one end and and housing Back pressure cavity 11 connects.First gas passage 411b one end connects with middle pressure jet channel T3, and first gas passage 411b's is another One end connect with running the cavity volume 411a other end, and second gas passage 411c both ends are respectively with running cavity volume 411a and the One air intake passage T1 is connected, third gas passage 411d both ends respectively with operation cavity volume 411a and the second compression member 30 Slide plate back pressure cavity 32 connects, the 4th gas passage 411e both ends respectively with operation cavity volume 411a and the first compression member 20 Slide plate back pressure cavity 22 connects.

As the action critical pressure P1 of pressure Pd- medium pressure gas pressure Pm≤slip core body 42 of housing back pressure cavity 11, Gases at high pressure introduction passage 421 is connected by the 4th gas passage 411e with the slide plate back pressure cavity 22 of the first compression member 20, and Connected by third gas passage 411d with the slide plate back pressure cavity 32 of the second compression member 30, due to the cunning of the first compression member 20 Piece back pressure cavity is connected with housing back pressure cavity 11 so that the gases at high pressure after compression are arranged into housing back pressure cavity 11, so, can just be incited somebody to action Gases at high pressure guide the second compression unit into through the 4th gas passage 411e, gases at high pressure introduction passage 421, third gas passage 411d In the slide plate back pressure cavity of part 30, now the pressure-driven slide plate 31 at the both ends of slide plate 31 of the second compression member 30 overcomes slide plate to position The brake force of part 50, slide plate 31 is moved and is only against on corresponding piston 34, and then makes the second compression member 30 and the first compression unit The cooperation of part 20, the high twin-tub operation carried under operating mode is achieved in, as shown in Figure 3.

When the pressure Pd- medium pressure gas pressure Pm ＜ of housing back pressure cavity 11 slide the action critical pressure P1 of core body 42, Slide core body 42 to move towards away from the direction of elastic component 43, low-pressure gas introduction passage 422 passes through second gas passage 411c and the One air intake passage T1 is connected, and is connected by third gas passage 411d with the slide plate back pressure cavity 32 of the second compression member 30.This Sample, low-pressure gas can just be guided into through second gas passage 411c, low-pressure gas introduction passage 422, third gas passage 411d In the slide plate back pressure cavity 32 of second compression member 30, now the pressure difference at the slide plate both ends of the second compression member 30 is smaller, and slide plate is not Dynamic, the second compression member 30 does not work, and only the first compression member 20 works, and thus achieves the single cylinder operation under low load operating mode, As shown in Figure 4.

Wherein, P1 design load is related to compressor purposes and the refrigerant run, wherein when compressor is cold for R410A Matchmaker and when being applied to field of air conditioning, for the compressor using R410A refrigerants, P1 design load is taken between 0.7-1.5MPa； For the compressor using R290 refrigerants, P1 design load is taken between 0.3-1.2MPa, for the compression using R32 refrigerants Machine, P1 design load are taken between 0.7-1.5MPa.Elastic component 43 can be compression spring, the size of compression spring and slip The action critical pressure P1 of core body 42 is relevant, after have chosen suitable P1 design load for compressor, by compression spring Relevant parameter is designed with regard to that can obtain satisfactory compression spring, compression spring is applied to slip core body 42 to reach On compress power meet slide core body 42 action critical pressure for P1 requirement.

As shown in figure 5a and 5b, in this embodiment, low-pressure gas introduction passage 422 and gases at high pressure introduction passage 421 It is the through hole that the side wall of core body 42 is slided in insertion, the aperture of through hole is respectively that d1 and d2, wherein d1 and d2 size do not surpass Cross 5mm, gases at high pressure introduction passage 421 is the straight hole intersected with sliding the central axis of core body 42, low-pressure gas introduction passage 422 include the first subchannel and the second subchannel of the central axis upright with sliding core body 42, the first subchannel and second point Passage connects at the central axis for sliding core body 42.

Slip core body 42 is cylinder, and operation cavity volume 411a is cylinder, runs cavity volume 411a internal diameter-slip core body 42 External diameter≤0.02mm, taken to by low-pressure gas introduction passage 422 or gases at high pressure introduction passage 421 in operation cavity volume 411a Lubricating oil, which can guarantee that between the wall for sliding core body 42 and operation cavity volume 411a wall, has preferable sealing.

In addition, the shape of low-pressure gas introduction passage 422 and gases at high pressure introduction passage 421 there can be multiple choices, such as scheme 6th, shown in Fig. 7 a, Fig. 7 b, the cross section of the first subchannel of low-pressure gas introduction passage 422 is Long Circle, the second subchannel Cross section is circle.It is appreciated that low-pressure gas introduction passage 422, gases at high pressure introduction passage 421 can be arranged as required to Position and shape so that slide core body 42 only at a certain position, respective channel connects with installation cavity 411, or slip The respective channel in a certain sliding scale of core body 42 connects with installation cavity 411.

As shown in Fig. 1,8, the first compression member 20 includes cylinder 23, bearing, piston 24, spring 25, the first compression member Formed with vane slot in 20 cylinder 23, slide plate 31 is provided with vane slot, spring 25 is connected to rear end and the slide plate of slide plate 21 Between groove and slide plate 21 tip often only be against on piston 24.Second compression member 30 includes cylinder 34, bearing, the second compression unit Formed with vane slot in the cylinder 34 of part 30, slide plate 31 is provided with vane slot, is limited between the rear end of slide plate 31 and vane slot Go out slide plate back pressure cavity 32.

As shown in figure 8, be enclosed on the bent axle of motor component and opened with crankshaft interval outside dividing plate 41, the He of the first compression member 20 One in second compression member 30 positioned at the top of dividing plate 41 and another be located at below dividing plate 41.In the implementation shown in accompanying drawing 8 In example, the first compression member 20 is located at the top of dividing plate 41 and inside has spring, and the second compression member 30 is located at the lower section of dividing plate 41 And only support or depart from corresponding cylinder by pressure differential slide plate.It will be understood by those skilled in the art that this be applicable it is new not It is limited to this, the first compression member 20 may be located on the lower section of dividing plate 41, now the second compression member 30 is located at the top of dividing plate 41.

As shown in figs. 9-11, offered on the operation cavity volume 411a of dividing plate 41 wall and be connected to middle pressure jet channel T3's First gas passage 411b, the second gas passage 411c for being connected to the first air intake passage T1, it is connected to the first compression member 20 Slide plate back pressure cavity third gas passage 411d, be connected to the second compression member 30 slide plate back pressure cavity the 4th gas passage 411e。

As shown in figs. 12-14, in a specific embodiment, it is perpendicular from the air entry processing of the cylinder of the first compression member 20 Straight hole, the vertical holes is often connected by second gas passage 411c with the operation cavity volume 411a of dividing plate 41, to realize operation cavity volume 411a and low-voltage space connection.The open end for running cavity volume 411a is carried on the back by the gap between dividing plate 41 and housing 10 and housing Pressure chamber 11 connects.

According to some embodiments of the utility model, as shown in Figure 1, Figure 2 with shown in Figure 16, middle pressure jet channel T3 formed every On plate 41, the 5th gas passage 411f is additionally provided with dividing plate 41, the first compression member 20 is by the 5th gas passage 411f with Press jet channel T3 connections.

As shown in Figure 15 and Figure 16, middle pressure jet channel T3 length direction, the length direction and dividing plate of slip core body 42 41 axial direction is perpendicular, and length direction angle α≤90 ° of the middle pressure jet channel T3 length direction with sliding core body 42.

In the specific embodiment shown in Figure 15, middle pressure jet channel T3 is with sliding the angle very little of core body 42 and along dividing plate 41 axially distribution up and down, first gas passage 411b are vertical substantially with sliding core body 42, middle pressure jet channel T3.In Figure 16 In shown specific embodiment, middle pressure jet channel T3 is 90 ° with the angle for sliding core body 42, middle pressure jet channel T3 center Axis, the central axis for sliding core body 42, first gas passage 411b central axis are substantially perpendicular to the axial direction of dividing plate 41 On same plane.One end of middle pressure air jet pipe 70 is connected with medium pressure gas feeding mechanism (such as flash vessel 500), middle pressure air jet pipe 70 The other end be inserted into middle pressure jet channel T3.

According to some embodiments of the utility model, as shown in FIG. 17 and 18, at least one end for sliding core body 42 is provided with Cushion pad 44.In further embodiments, as shown in figure 19, the both ends with sliding core body 42 for running cavity volume 411a are relative respectively Both ends of the surface at least one be provided with cushion pad 44.It is appreciated that only it can be set at the both ends for sliding core body 42 slow Pad 44 is rushed, cushion pad 44 only can also be set at operation cavity volume 411a both ends, can also be in operation cavity volume 411a one end Cushion pad 44 is set and cushion pad 44 is set on the relative end face of the other end with running cavity volume 411a for sliding core body 42. So, the impact to running cavity volume 411a when slip core body 42 moves to two limit positionses is effectively reduced, improves transfiguration control The reliability of mechanism 40 processed.

The material of cushion pad 44 be oil resistant, wear-resisting nonmetallic materials, cushion pad 44 can be bonded in slide core body 42 or Run on cavity volume 411a.

As shown in figure 21, variable capacity control mechanism 40 also includes sealing ring 45, and the periphery wall of slip core body 42, which is provided with, to be used for The seal groove 423 of sealing ring 45 is installed.Specifically, as shown in Fig. 2 and Figure 22, sealing ring 45 is provided with opening in order to sealing ring 45 dismounting on seal groove 423, the material of sealing ring 45 is gray iron or magnesium iron.Thus, by being arranged with seal groove 423 Sealing ring 45, it can strengthen and slide 42 weeks sealings for facing each gas passage of core body.Sealing ring 45 is with operation cavity volume 411a's Inwall has certain magnitude of interference, and the magnitude of interference is between 4 μm and 20 μm.

According to the compressor of the utility model second aspect embodiment, shown in reference picture 23, the pressure of second aspect embodiment The difference of contracting machine and the compressor of above-mentioned first aspect embodiment is：The slide plate back pressure cavity 32 of second compression member 30 may be selected Ground connects with the air intake passage T1 of housing back pressure cavity 11 or first.So in the case where height carries operating mode by by the height in housing back pressure cavity 11 Body of calming the anger is introduced directly into the slide plate back pressure cavity 32 of the second compression member 30, to realize that the high twin-tub carried under operating mode is run.This The operation principle of the compressor of two aspect embodiments and effect are similar with the compressor of first aspect embodiment, do not go to live in the household of one's in-laws on getting married herein State.

As shown in figures 24 and 25, the gases at high pressure introduction passage 421 for sliding core body 42 is located at end and all the time with operation One end connection connected on cavity volume 411a with housing back pressure cavity 11.

Specifically, installation cavity 411 includes：Run cavity volume 411a, first gas passage 411b, second gas passage 411c And third gas passage 411d.Core body 42 is slided to be slidably disposed in operation cavity volume 411a, one end of elastic component 43 with The other end of operation cavity volume 411a connections and elastic component 43 is connected with slip core body 42, run cavity volume 411a open at one end and with Housing back pressure cavity 11 connects, low-pressure gas introduction passage 422 through slide core body 42 the other end and often with housing back pressure cavity 11 Connection.First gas passage 411b one end connects with middle pressure jet channel T3, first gas passage the 411b other end and fortune Row cavity volume 411a other end connection.Second gas passage 411c both ends are respectively with running cavity volume 411a and the first air intake passage T1 is connected, third gas passage 411d both ends respectively with operation cavity volume 411a and the slide plate back pressure cavity 32 of the second compression member 30 Connection.

As the action critical pressure P1 of pressure Pd- medium pressure gas pressure Pm≤slip core body 42 of housing back pressure cavity 11, Gases at high pressure introduction passage 421 directly connects with housing back pressure cavity 11 and by third gas passage 411d and the second compression member 30 slide plate back pressure cavity 32 connects, referring to Figure 24.

When the pressure Pd- medium pressure gas pressure Pm ＜ of housing back pressure cavity 11 slide the action critical pressure P1 of core body 42, Low-pressure gas introduction passage 422 is connected by second gas passage 411c with the first air intake passage T1, and is led to by third gas Road 411d connects with the slide plate back pressure cavity 32 of the second compression member 30, referring to Figure 25.

As shown in Figure 26 a and 26b, in this embodiment, the gases at high pressure introduction passage 421 slided on core body 42 includes edge Slide the extension of core body 42 central axis and insertion slide core body 42 one end the first subchannel and be connected with the first subchannel and The second subchannel of the side wall of core body 42 is slided in insertion.

In addition, the slip core body 42 in embodiment shown in Fig. 8 to Figure 22 can be the slip in first aspect embodiment The slip core body of core body or second aspect embodiment.

As shown in figure 27, included according to the refrigeration system 1000 of the utility model third aspect embodiment：Rotary compression Machine 100, condenser 200, first throttle device 300, flash vessel 500, second throttling device 600 and evaporator 400.Condenser 200 refrigerant import connects with the refrigerant exit of compressor, and the refrigerant import of first throttle device 300 is cold with condenser 200 Matchmaker's outlet, the refrigerant import of flash vessel 500 connects with the refrigerant exit of first throttle device 300, during flash vessel 500 has Refrigerant exit is pressed, middle pressure refrigerant exit connects with middle pressure jet channel, the refrigerant import and flash vessel of second throttling device 600 500 refrigerant exit connection, the refrigerant import of evaporator 400 connect with the refrigerant exit of second throttling device 600, evaporator 400 refrigerant exit and the refrigerant import of compressor connect.

According to capacity variable type compressor of the present utility model, with the change of refrigeration space load, refrigeration system 1000 is run The change of operating mode, compressor can realize the switching of single twin-tub mode adaptive, and twin-tub is run when realizing big load, single cylinder during Smaller load Operation, greatly improves energy conservation of compressor efficiency.

In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " suitable The orientation or position relationship of the instruction such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on the orientation described in accompanying drawing Or position relationship, be for only for ease of description the utility model and simplify and describe, rather than instruction or imply signified device or Element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to limit of the present utility model System.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, such as two It is individual, three etc., unless otherwise specifically defined.

In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be Mechanically connect or electrically connect or can communicate each other；Can be joined directly together, the indirect phase of intermediary can also be passed through Even, can be two element internals connection or two elements interaction relationship, limited unless otherwise clear and definite.For this For the those of ordinary skill in field, concrete meaning of the above-mentioned term in the utility model can be understood as the case may be.

In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be 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 ", " lower section " and " below " can be with Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be with Combined in an appropriate manner in any one or more embodiments or example.In addition, in the case of not conflicting, this area Technical staff the different embodiments or example and the feature of different embodiments or example described in this specification can be entered Row combines and combination.

Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.

Claims

A kind of 1. rotary compressor, it is characterised in that including：

Housing, the housing is interior to have housing back pressure cavity；

Compression mechanism, the compression mechanism are located in the housing, formed with the first air intake passage, second in the compression mechanism Air intake passage and middle pressure jet channel, the compression mechanism include：

First compression member, first air intake passage, medium pressure jet channel connect with first compression member to be thought The first compression member supply；

Second compression member, second air intake passage connects with second compression member thinks that second compression member supplies Gas, the slide plate back pressure cavity of second compression member selectively with the slide plate back pressure cavity of first compression member or described One air intake passage connects, wherein, the slide plate back pressure of the slide plate back pressure cavity of second compression member and first compression member When chamber connects, first compression member and second compression member are all run, the slide plate back of the body of second compression member When pressure chamber connects with first air intake passage, only described first compression member operation；And

Variable capacity control mechanism, one end of the variable capacity control mechanism connect with medium pressure jet channel, and the transfiguration controls The other end of mechanism connects with the housing back pressure cavity, to be driven by being applied under the differential pressure action of the variable capacity control mechanism The variable capacity control mechanism selectively connects the slide plate back pressure cavity of second compression member and first compression member The slide plate back pressure cavity and first air intake passage of slide plate back pressure cavity or connection second compression member.
2. rotary compressor according to claim 1, it is characterised in that be provided with elastic component in the variable capacity control mechanism With slip core body, the action critical pressure for sliding core body and the differential pressure action are in opposite direction, when the pressure differential deltap P≤cunning During the action critical pressure P1 of dynamic core body, the variable capacity control mechanism connects slide plate back pressure cavity and the institute of second compression member State the slide plate back pressure cavity of the first compression member；When the pressure differential deltap P ＜ slide the action critical pressure P1 of core body, the transfiguration Controlling organization connects the slide plate back pressure cavity of second compression member and first air intake passage.
3. rotary compressor according to claim 2, it is characterised in that the variable capacity control mechanism includes：

Dividing plate, for the dividing plate between first compression member and second compression member, the dividing plate has installation Chamber；

The slip core body is provided with low-pressure gas introduction passage and gases at high pressure introduction passage, and the slip core body is slideably It is located in the installation cavity, described one end for sliding core body is connected by elastic component with the dividing plate and medium pressure jet channel Connect with the installation cavity and connected with guiding medium pressure gas into described in end housing back pressure cavity with the installation cavity with by high pressure gas Body guides the other end of the slip core body into；

As the action critical pressure P1 of pressure Pd- medium pressure gas pressure Pm≤slip core body of housing back pressure cavity, the high pressure Gas inlet pathways and the installation cavity are by the slide plate back pressure cavity of first compression member and the cunning of second compression member Piece back pressure cavity connects；When the pressure Pd- medium pressure gas pressure Pm ＜ of housing back pressure cavity slide the action critical pressure P1 of core body, The low-pressure gas introduction passage and the installation cavity carry on the back first air intake passage and the slide plate of second compression member Press chamber connection.
4. rotary compressor according to claim 3, it is characterised in that the installation cavity includes：

Run cavity volume, it is described slip core body be slidably disposed on it is described operation cavity volume in, one end of the elastic component with it is described Operation cavity volume connection and the other end of the elastic component with it is described slip core body be connected, it is described run cavity volume open at one end and with The housing back pressure cavity connection；

First gas passage, one end of the first gas passage are connected with medium pressure jet channel, and the first gas is led to The other end in road connects with the other end of the operation cavity volume；

Second gas passage, the both ends of the second gas passage connect with the operation cavity volume and first air intake passage respectively It is logical；

Third gas passage, the both ends of the third gas passage respectively with the operation cavity volume and second compression member Slide plate back pressure cavity connects；And

4th gas passage, the both ends of the 4th gas passage respectively with the operation cavity volume and first compression member Slide plate back pressure cavity connects；

As the action critical pressure P1 of pressure Pd- medium pressure gas pressure Pm≤slip core body of housing back pressure cavity, the high pressure Gas inlet pathways are connected by the 4th gas passage with the slide plate back pressure cavity of first compression member, and pass through third gas Passage connects with the slide plate back pressure cavity of second compression member；As the pressure Pd- medium pressure gas pressure Pm ＜ of housing back pressure cavity When sliding the action critical pressure P1 of core body, the low-pressure gas introduction passage passes through the second gas passage and described first Air intake passage connects, and is connected by the third gas passage with the slide plate back pressure cavity of second compression member.
5. rotary compressor according to claim 3, it is characterised in that medium pressure jet channel formed it is described every On plate, the 5th gas passage is additionally provided with the dividing plate, first compression member passes through the 5th gas passage and medium pressure Jet channel connects.
6. rotary compressor according to claim 5, it is characterised in that the length direction of medium pressure jet channel, The axial direction of the length direction and the dividing plate for sliding core body is perpendicular, and the length direction of medium pressure jet channel and institute State length direction angle α≤90 ° for sliding core body.
7. rotary compressor according to claim 3, it is characterised in that described at least one end for sliding core body is provided with Cushion pad；And/or the operation cavity volume with least one in the both ends of the slip core body respectively relative both ends of the surface Provided with cushion pad.
8. according to the rotary compressor any one of claim 1-7, it is characterised in that also include：Slide plate keeper, The slide plate keeper is arranged to when the slide plate back pressure cavity of second compression member connects with first air intake passage, institute Slide plate keeper is stated to be combined with the slide plate to position slide plate and make the slide plate to be accommodated in second compression member Vane slot in, when the slide plate back pressure cavity of second compression member connects with the housing high pressure chamber, under differential pressure action The slide plate keeper departs from the slide plate so that slide plate is only against on corresponding piston.
9. rotary compressor according to claim 8, it is characterised in that the slide plate keeper is magnetic part, in institute When stating the slide plate back pressure cavity of the second compression member and being connected with first air intake passage, the slide plate keeper and the slide plate magnetic Property adhesive.
A kind of 10. refrigeration system, it is characterised in that including：

Rotary compressor as claimed in any one of claims 1-9 wherein；

Condenser, the refrigerant import of the condenser connect with the refrigerant exit of the compressor；

First throttle device, the refrigerant import of the first throttle device connect with the refrigerant exit of the condenser；

Flash vessel, the refrigerant import of the flash vessel connect with the refrigerant exit of the first throttle device, the flash distillation utensil There is middle pressure refrigerant exit, medium pressure refrigerant exit connects with medium pressure jet channel；

Second throttling device, the refrigerant import of the second throttling device are connected with the refrigerant exit of the flash vessel；And

Evaporator, the refrigerant import of the evaporator connect with the refrigerant exit of the second throttling device, the evaporator Refrigerant exit is connected with the refrigerant import of the compressor.