CN205533231U - Multi -cylinder rotary compressor and have its refrigeration cycle device - Google Patents

Abstract

The utility model discloses a multi -cylinder rotary compressor and have its refrigeration cycle device. Multi -cylinder rotary compressor has taken in compressing mechanism portion and motor in sealed casing, be equipped with the breathing pipe on the casing, and compressing mechanism portion includes: possess the 1st cylinder and the 2nd cylinder in the 1st compression chamber and the 2nd compression chamber respectively, the 1st cylinder and the 2nd cylinder all are equipped with the gleitbretter. Establish the median septum between the 1st cylinder and the 2nd cylinder. Eccentric moving piston carries out in the 1st compression chamber and the 2nd compression chamber. Drive the eccentric moving bent axle of two pistons. The 1st compression chamber and the 2nd compression chamber communicate the breathing pipe and the silencer intercommunication of breathing in with the inside silencer of breathing in that possesses of median septum respectively. According to the utility model discloses an inspiratory interference can not take place for multi -cylinder rotary compressor, can avoid the problem that cold volume and compression efficiency reduce, has reduced multi -cylinder rotary compressor's noise simultaneously.

Description

Multi-cylinder rotary compressor and there is its refrigerating circulatory device

Technical field

This utility model relates to compressor field, especially relates to a kind of multi-cylinder rotary compressor and has its refrigerating circulatory device.

Background technology

It is a big problem that the heating capacity of the domestic air conditioning that rotary compressor popularity rate is the highest and APF (specific consumption in season) promote.As the improvement means of these problems, can use the frequency conversion type multi-cylinder rotary compressor having low cruise to high-speed cruising excursion, the high rotation speed of compressor can expand 150rps to from current 120rps.Along with the increase of the speed of service, need to expand air-breathing caliber, but the cylinder High definition of multi-cylinder rotary compressor must be less, so air-breathing caliber expands relatively difficult.

As improvement alternative, thicker median septum is connected to 1 big suction nozzle of caliber, method that air-breathing is diverted in each compression chamber has obtained practical.Low pressure gas cognition owing to sucking from 1 suction hole is diverted in 2 compression chambers, therefore starts the compression chamber of air-breathing, can grab low-pressure gas from the compression chamber of the opposing party having terminated suction, produce the problem that between what is called compression chamber, air-breathing is interfered.Thus the phenomenon that the actual inspiration capacity producing each compression chamber declines, particularly when high speed rotating, cold is decreased obviously.

Utility model content

One of technical problem that this utility model is intended to solve in correlation technique the most to a certain extent.

To this end, the utility model proposes a kind of multi-cylinder rotary compressor, the interference of air-breathing will not occur, evade cold and the problem of compression efficiency reduction.

This utility model also proposes a kind of refrigerating circulatory device with above-mentioned multi-cylinder rotary compressor.

Multi-cylinder rotary compressor according to this utility model embodiment, compression mechanical part and motor has been received in the housing sealed, described housing is provided with suction nozzle, described compression mechanical part includes: possess the 1st compression chamber and the 1st cylinder of the 2nd compression chamber and the 2nd cylinder respectively, and described 1st cylinder and described 2nd cylinder are equipped with slide plate；It is located at the median septum between described 1st cylinder and described 2nd cylinder；The piston of eccentric operating is carried out in described 1st compression chamber and described 2nd compression chamber；Drive the bent axle of two described piston eccentric operating；The inhaling silencer that described 1st compression chamber possesses with septum intralaminar part respectively with described 2nd compression chamber connects, and described suction nozzle connects with described inhaling silencer.

Multi-cylinder rotary compressor according to this utility model embodiment, the interference of air-breathing will not occur, cold and the problem of compression efficiency reduction can be evaded, inhaling silencer can cut down the air-breathing pulsation sound of the 1st compression chamber and the generation of the 2nd compression chamber simultaneously, reduces the noise of multi-cylinder rotary compressor.

In embodiments more of the present utility model, described suction nozzle is located on septum plate and is at least one.

In embodiments more of the present utility model, it is respectively equipped with acoustic filter intercommunicating pore on described 1st cylinder and described 2nd cylinder, described 1st cylinder and described 2nd cylinder are correspondingly arranged a described suction nozzle respectively, and each described suction nozzle is connected with described inhaling silencer by corresponding described acoustic filter intercommunicating pore.

In embodiments more of the present utility model, the volume of described inhaling silencer more than described 1st compression chamber and described 2nd compression chamber discharge capacity and.

In embodiments more of the present utility model, the centerline axis parallel of described suction nozzle is arranged.

In embodiments more of the present utility model, the periphery wall of septum plate is fixed on the internal perisporium of described housing.

According to the refrigerating circulatory device of this utility model embodiment, including the multi-cylinder rotary compressor according to this utility model above-described embodiment.

According to the refrigerating circulatory device of this utility model embodiment, by being provided with above-mentioned multi-cylinder rotary compressor, the interference of air-breathing will not occur, cold and the problem of compression efficiency reduction can be evaded, reduce noise simultaneously.

In embodiments more of the present utility model, one end of described suction nozzle is connected with the reservoir being positioned at described hull outside.

Accompanying drawing explanation

Fig. 1 is relevant to embodiment 1 of the present utility model, represent the internal structure of multi-cylinder rotary compressor；

Fig. 2 is relevant to embodiment 1, represents the partial schematic diagram of compression mechanical part；

Fig. 3 is relevant to embodiment 1, represents the cross-sectional view of compression mechanical part；

Fig. 4 is relevant to embodiment 2 of the present utility model, represent that the plane of compression mechanical part is schemed in detail；

Fig. 5 is relevant to embodiment 2 of the present utility model, represent the relation aspect of the speed of service (rps) and cold (W) and the comparison diagram of design in the past；

Fig. 6 is relevant to embodiment 3 of the present utility model, represent the partial schematic diagram of compression mechanical part.

Reference:

Multi-cylinder rotary compressor 1, housing 2, motor 4, motor stator 4a, rotor 4b,

Compression mechanical part 5, median septum 50, 1st cylinder 11, 2nd cylinder 21, 1st compression chamber 11a, 2nd compression chamber 21a, 1st piston 18, 2nd piston 28, 1st end plate 40, 2nd end plate 45, 1st high pressure acoustic filter 41, 2nd high pressure acoustic filter 46, bent axle 30, slide plate 26, low pressure acoustic filter 52, 1st inlet hole 12, 2nd inlet hole 22, 1st inclined hole 12a, 2nd inclined hole 22a, gases at high pressure passage 60, acoustic filter steam vent 46a, steam vent 47, outside crest line 56a, inner side crest line 56b, median septum window 53,

Screw 8, suction nozzle 55, exhaustor 3, acoustic filter intercommunicating pore 15 (25),

Reservoir 80, L-shaped pipe 85, condenser 81, expansion valve 82, vaporizer 83.

Detailed description of the invention

Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings.The embodiment described below with reference to accompanying drawing is exemplary, it is intended to be used for explaining this utility model, and it is not intended that to restriction of the present utility model.

In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", on " ", D score, " front ", " afterwards ", " left ", " right ", " vertically ", " level ", " push up ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumferential " are based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express 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, three etc., unless otherwise expressly limited specifically.

In this utility model, unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection ", the term such as " fixing " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be mechanically connected, it is also possible to be electrical connection or each other can communication；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in this utility model can be understood as the case may be.

The multi-cylinder rotary compressor 1 according to this utility model embodiment is described in detail below with reference to Fig. 1-Fig. 6.Multi-cylinder rotary compressor 1 of the present utility model can be Vertical multi-cylinder rotary compressor, horizontal multi-cylinder rotary compressor or swing multi-cylinder rotary compressor.

Multi-cylinder rotary compressor 1 according to this utility model embodiment, compression mechanical part 5 and motor 4 has been received in the housing 2 sealed, housing 2 is provided with suction nozzle 55, it is understandable that, exhaustor 3 it is additionally provided with on housing 2, exhaustor 3 connects in housing 2, i.e. multi-cylinder rotary compressor 1 is housing high pressure formula rotary compressor.Compression mechanical part 5 includes: possess the 1st cylinder the 11 and the 2nd cylinder 21 of the 1st compression chamber 11a and the 2nd compression chamber 21a respectively, and the 1st cylinder the 11 and the 2nd cylinder 21 is equipped with slide plate 26.It is located at the median septum 50 between the 1st cylinder the 11 and the 2nd cylinder 21.The piston of eccentric operating is carried out in the 1st compression chamber 11a and the 2nd compression chamber 21a.Drive the bent axle 30 of two piston eccentric operating.1st compression chamber 11a and the 2nd compression chamber 21a inhaling silencer 52 that possess internal with median septum 50 respectively connects, and suction nozzle 55 connects with inhaling silencer 52.

In other words, compression mechanical part 5 includes the 1st cylinder the 11, the 2nd cylinder 21, slide plate the 26, the 1st piston the 18, the 2nd piston 28, median septum 50 and bent axle 30.

Being provided with the 1st compression chamber 11a in 1st cylinder 11, be provided with the 2nd compression chamber 21a in the 2nd cylinder 21, median septum 50 is located between the 1st cylinder the 11 and the 2nd cylinder 21.Being provided with the 1st piston 18 of eccentric rotation in 1st compression chamber 11a, be provided with the 2nd piston 28 of eccentric rotation, the 1st cylinder the 11 and the 2nd cylinder 21 is respectively equipped with slide plate 26 in the 2nd compression chamber 21a, two slide plates 26 coordinate with the 1st piston the 18 and the 2nd piston 28 respectively.

1st piston the 18 and the 2nd piston 28 is outer respectively to be enclosed within bent axle 30 to be driven rotation by bent axle 30.Cavity it is provided with to limit inhaling silencer 52 in median septum 50.1st compression chamber 11a and the 2nd compression chamber 21a connects with inhaling silencer 52 respectively.

Motor 4 includes that motor stator 4a and rotor 4b, rotor 4b are fixed on bent axle 30 to drive bent axle 30 to rotate.

The low-pressure gas coolant that suction nozzle 55 sucks enters in inhaling silencer 52, enters in the low-pressure gas coolant in inhaling silencer 52 is drawn into the 1st compression chamber 11a and the 2nd compression chamber 21a respectively and is compressed.

In examples more of the present utility model, the periphery wall of median septum 50 is fixed on the internal perisporium of housing 2.Of course, it should be understood that the fixed form of compression mechanical part 5 is not limited to this, such as, the 1st cylinder the 11 and/or the 2nd cylinder 21 can also be used to be fixed on the internal perisporium of housing 2.

Of course, it should be understood that multi-cylinder rotary compressor 1 can be the compressor of more than duplex cylinder compressor or triplex and triplex, when the compressor that multi-cylinder rotary compressor 1 is more than triplex and triplex, compression mechanical part 5 also includes at least one the 3rd cylinder.

Multi-cylinder rotary compressor 1 according to this utility model embodiment, by arranging inhaling silencer 52 in median septum 50, thus the low-pressure gas coolant sucked from suction nozzle 55 is introduced in inhaling silencer 52, have respectively entered in the 1st compression chamber 11a and the 2nd compression chamber 21a the most again, therefore the 1st compression chamber 11a and the 2nd compression chamber 21a will not occur the interference of air-breathing, cold and the problem of compression efficiency reduction can be evaded, inhaling silencer 52 can cut down the air-breathing pulsation sound that the 1st compression chamber 11a and the 2nd compression chamber 21a produces simultaneously, reduce the noise of multi-cylinder rotary compressor 1.

In embodiments more of the present utility model, suction nozzle 55 is located on median septum 50 and is at least one.The most as shown in Figures 2 and 3, suction nozzle 55 is one and is located on median septum 50；As shown in Figure 4, suction nozzle 55 is two and two suction nozzles 55 are each provided on median septum 50 connecting with inhaling silencer 52.Of course, it should be understood that suction nozzle 55 can also be three and more than three.Preferably, when suction nozzle 55 is multiple, the centerline axis parallel of multiple suction nozzles 55 is arranged.

In other embodiments of the present utility model, as shown in Figure 6, it is respectively equipped with acoustic filter intercommunicating pore on 1st cylinder the 11 and the 2nd cylinder 21,1st cylinder the 11 and the 2nd cylinder 21 is correspondingly arranged a suction nozzle 55 respectively, and each suction nozzle 55 is connected with inhaling silencer 52 by corresponding acoustic filter intercommunicating pore.It is to say, the low-pressure gas coolant from the suction of each suction nozzle 55 enters in inhaling silencer 52 after corresponding acoustic filter intercommunicating pore.Preferably, the centerline axis parallel of suction nozzle 55 is arranged.

In preferred embodiment of the present utility model, the volume of inhaling silencer 52 more than the 1st compression chamber 11a and the 2nd compression chamber 21a discharge capacity and.

According to the refrigerating circulatory device of this utility model embodiment, including the multi-cylinder rotary compressor 1 according to this utility model above-described embodiment.

According to the refrigerating circulatory device of this utility model embodiment, by being provided with above-mentioned multi-cylinder rotary compressor 1, the interference of air-breathing will not occur, cold and the problem of compression efficiency reduction can be evaded, reduce noise simultaneously.

In embodiments more of the present utility model, one end of suction nozzle 55 is connected with the reservoir 80 being positioned at outside housing 2.

The multi-cylinder rotary compressor according to three specific embodiments of this utility model is described in detail below with reference to Fig. 1-Fig. 6.

Embodiment 1:

Fig. 1 represents the internal structure of multi-cylinder rotary compressor 1 of the present utility model, and Fig. 2 represents the detailed construction of compression mechanical part 5.The periphery wall of the median septum 50 that in Fig. 1, the internal perisporium at housing 2 secures the composition periphery wall of motor stator 4a of motor 4, the center of compression mechanical part 5 possesses.

The 1st end plate 40 and the 2nd end plate 45, the 1st high pressure acoustic filter 41 and the 2nd high pressure acoustic filter 46 etc. that in the 1st compression chamber 11a that compression mechanical part 5 is had by fixing the 1st cylinder 11 in the two sides of median septum 50 and the 2nd cylinder 21, above-mentioned each cylinder and the 2nd compression chamber 21a, these compression chambers, the 1st piston 18 of storage and each opening surface of the 2nd piston 28, above-mentioned compression chamber connect are constituted.It addition, the 1st high pressure acoustic filter the 41 and the 2nd high pressure acoustic filter 46 is provided with the exhaust apparatus such as steam vent and air bleeding valve (not shown).

1st cylinder the 11 and the 2nd cylinder 21 is fixed in two planes of median septum 50 by 4 groups of screws 8 respectively together with the 1st end plate the 40 and the 2nd end plate 45.Secure the bearing that the bent axle 30 of rotor 4b possessed by the center of the 2nd end plate the 45 and the 1st end plate 40 and carry out the rotation that is slidably matched.

Bent axle 30 drives and carries out eccentric rotary by the 1st piston the 18 and the 2nd piston 28 of 180 degree of relative angle configurations.It addition, link with these pistons, 2 slide plates 26 (Fig. 3) move back and forth.Therefore, the 1st compression chamber 11a and the 2nd compression chamber 21a carries out suction and the compression of low-pressure gas.The outer openings end of the suction nozzle 55 that the low pressure acoustic filter 52 (being above-mentioned inhaling silencer) being equipped with in median septum 50 connects is connected to the L-shaped pipe 85 that the center of reservoir 80 possesses.It addition, suction nozzle 55 is after press-in is connected in the inlet hole that low pressure acoustic filter 52 possesses, it is welded on housing 2.

Discharge from 2 compression chambers, respectively through acoustic filter and flow out to exhaustor 3 that the gases at high pressure within housing 2 possess from the upper end of housing 2 by condenser 81, expansion valve 82, the sequential flowing of vaporizer 83, become the coolant of low-pressure gas from reservoir 80 through suction nozzle 55 is flowed into low pressure acoustic filter 52.Thereafter, low-pressure gas is from the beginning of the 1st inlet hole the 12 and the 2nd inlet hole 22 to low pressure acoustic filter 52 opening, be flowed in the 1st compression chamber 11a and the 2nd compression chamber 21a by the 1st inclined hole 12a and the 2nd inclined hole 22a respectively.

After in the 1st compression chamber 11a, the gases at high pressure of compression are discharged to the 1st high pressure acoustic filter 41, flowed out in the 2nd high pressure acoustic filter 46 by the gases at high pressure passage 60 of up/down perforation compression mechanical part 5.From the gases at high pressure of the 2nd compression chamber 21a discharge and collaborate from the 1st high pressure acoustic filter 41 gas out, start to be discharged to the top of compression mechanical part 5 from acoustic filter steam vent 46a.Therefore, the internal pressure of housing 2 is high-pressure side.

Fig. 3 be the Section X-X figure of Fig. 2, Fig. 2 be the Y-Y sectional view of Fig. 3.Fig. 3 represents the above of median septum 50 and the horizontal cross-section of the 2nd cylinder 21.It addition, centered by the slide plate 26 that possesses in the 2nd cylinder 21 of Fig. 3, represent the 2nd inlet hole 22 and the position of steam vent 47 that its both sides possess.2nd inlet hole 22 is to low pressure acoustic filter 52 opening, and the steam vent 47 possessed in the 2nd end plate 45 is to the 2nd high pressure acoustic filter 46 opening.

Petal-like outside, shown in dotted line 4 crest line 56a be the outer wall crest line of low pressure acoustic filter 52, circular inner side crest line 56b be its inwall crest line.Outside crest line 56a be petal-like reason be to avoid the tapping hole of 4 screws 8 that possesses in median septum 50 and 1 gases at high pressure passage 60.But, the shape of low pressure acoustic filter 52 can carry out all deformation as required.It addition, 4 median septum windows 53 of through median septum 50 are the gases at high pressure in housing 2 and the movable passageway of oil.

In Fig. 3, the gyratory directions of the 2nd piston 28 carrying out eccentric operating in the 2nd cylinder 21 is that counterclockwise the 2nd piston 28 is positioned at the rotary position starting about 270 degree from slide plate 26.Therefore, the suction stroke of the low pressure chamber of the 2nd compression chamber 21a split by the 2nd piston 28 and the instroke of high pressure chest are all close to completing (anglec of rotation 360 degree) state.

The anglec of rotation of the 1st piston 18 carrying out off-centre operation in the 1st compression chamber 11a connected below median septum 50 is in and the 2nd diametical position of piston 28 (about 90 degree), so the 1st compression chamber 11a is exactly after suction stroke starts, it is in the position of rotation that inspiration capacity expands rapidly.

In the present embodiment 1, possessing low pressure acoustic filter 52 between the 1st inlet hole the 12 and the 2nd inlet hole 22, so the 1st compression chamber 11a there is no need to fight for the air-breathing of the 2nd compression chamber 21a, the 1st compression chamber 11a easily obtains air-breathing from low pressure acoustic filter 52.That is, 2 compression chambers will not occur the dry phenomenon of air-breathing.Therefore, even if in high speed rotating, 2 compression chambers can also obtain the air-breathing of necessity and sufficiency.

Next according to Fig. 3, the arrangement angles of suction nozzle 55 is illustrated.In conventional design, the straight line connecting compression chamber center and inlet hole is necessary to configure suction nozzle, but suction nozzle of the present utility model 55 can be connected to the optional position of low pressure acoustic filter 52.Therefore, the configuration degree of freedom of the suction nozzle 55 of embodiment 1 is big, favourable to the installation degree of freedom of various devices.

But in order to play the volume effects of low pressure acoustic filter 52 fully, the opening of suction nozzle 55 and the 1st inlet hole the 12 and the 2nd inlet hole 22 leave relatively good.It addition, for the noise reducing effect playing low pressure acoustic filter 52 to greatest extent, need the position of suction nozzle 55 is optimized.

Here, the material of median septum 50 is illustrated.Generally, the material abrasion performance to be considered of median septum and processability etc., select (such as FC250) such as foundry goods.Therefore, the median septum 50 of the present embodiment can use above-mentioned material.

Next, as a example by the frequency conversion type rotary compressor (total displacement of 2 cylinders is as 11cc) carried in most popular home-use air-conditioner, the necessary volume of low pressure acoustic filter 52 is illustrated.The external diameter (suitable with the internal diameter of housing 2) of median septum 50 and when thickness is respectively about 105mmx15mm, the volume estimate of low pressure acoustic filter 52 be 40～50cc, discharge capacity (11cc) relative to above-mentioned compressor, the volume of low pressure acoustic filter 52 is its about 4 times.

This is equivalent to 4 turns of the 1st piston the 18 and the 2nd piston 28 in operating.As long as i.e. the 50rps at relatively low speed ensures if cold, the cold of its rotary speed 200rps of 4 times ensures that.I.e. it is interpreted as that the volume of low pressure acoustic filter 52 is enough the most permissible.

On the other hand, need to consider the air resistance in suction nozzle 55 flowing, such as embodiment 1, the when that the cold of 1 suction nozzle 200rps guaranteeing difficulty, this utility model needs 2 suction nozzles or 3 can also as following embodiment 2 (Fig. 4).Additionally, much less, even if median septum 50 thickeies, it is also possible to expand the caliber of suction nozzle.Therefore, this utility model has superiority in terms of air-breathing loop expands the degree of freedom of design.

Embodiment 2:

The present embodiment is as it has been described above, feature is to connect several suction nozzle in low pressure acoustic filter 52.As shown in Figure 4, it is in median septum 50, be equipped with 2 suction nozzle 55a and the design of suction nozzle 55b, owing to inspiratory resistance declines, cold and the compression efficiency of necessity if higher high speed rotating, can be obtained.Even if it addition, increase the discharge capacity of 2 compression chambers, owing to the thickness adding, not changing median septum 50 of suction nozzle can ensure that the cold of necessity.

In the diagram, point intracavity that a part of the outside crest line 56a of low pressure acoustic filter 52 expands, it is connected to suction nozzle 55a and suction nozzle 55b.The outer openings end of 2 above-mentioned suction nozzles, it is connected in reservoir 80 as shown in Figure 1 independent 2 the L word pipe 85 possessed.Additionally, as shown in Figure 4, if suction nozzle 55a and suction nozzle 55b configured in parallel, it is easy for assembling of L word pipe 85.

Fig. 5 represents the speed of service of above-mentioned rotary compressor and the relation of cold.Transverse axis be the speed of service (rps), the longitudinal axis be cold (W).Straight line T according to the data (W/rps) of be not readily susceptible to speed of service impact 50～60rps, represent that speed of service straight line in proportion extends to the cold desired value of 150rps.It addition, the cold at 150rps is 100%.

1. data are the experiment values of embodiment 2.2. data are most popular style (in such as prior art, 2 cylinders possess 1 suction nozzle respectively).3. data are the styles being diverted to the conventional compressor 2 compression chambers from 1 suction nozzle connecting median septum.It addition, the difference of above-mentioned 3 styles design is air suction way design, such as relevant with cold cylinder engine etc. is common.

1. the embodiment 2 shown in declines for starting cold from about 140rps, and thereafter, slippage increases on a small quantity, is about 1% about 150rps when.2. be of about 100rps start cold decline, with running speed, slippage increases, and about reduces the cold of 7% when 150rps.3., for starting cold decline from about 90rps, when about 150rps, the cold of 12% is the most about reduced.

2., in styles design, 2 suction nozzles being connected with cylinder are independent, and air-breathing caliber is little, suction nozzle drag losses rotate at high speed be the main cause that cold declines.3. big relative to 2. air-breathing caliber, but the air-breathing between compression chamber is dry can cause cold to decline.It can thus be appreciated that 1. the effect of low pressure acoustic filter 52 and big 2 suction nozzles of caliber is big, hence it is evident that than other 2 effective.

Additionally, the volume of the low pressure acoustic filter 52 of embodiment 2 specially reduces, even with 2 displacement volumes and quite (the most about 11cc) time, the cold of high speed rotating decline little, embodiment 2 be better than above-mentioned 2. and 3., can be proven according to experiment.

Embodiment 3:

In embodiment 3 shown in Fig. 6, represent that possess the 1st cylinder the 11 and the 2nd cylinder 21 of suction nozzle 55a independently and suction nozzle 55b sucks the design of low-pressure gas from the low pressure acoustic filter 52 of median septum 50.Acoustic filter intercommunicating pore 15 that the side of the 1st cylinder the 11 and the 2nd cylinder 21 possesses respectively and acoustic filter intercommunicating pore 25 are all to low pressure acoustic filter 52 perforate.It addition, these acoustic filter intercommunicating pores are connected to suction nozzle 55a and suction nozzle 55b respectively.

Therefore, after the low-pressure gas, in reservoir 80 is flowed into low pressure acoustic filter 52 by suction nozzle 55a, suction nozzle 55b, acoustic filter intercommunicating pore 15 and acoustic filter intercommunicating pore 25, begin to flow into the 1st compression chamber 11a and the 2nd compression chamber 21a from the 1st inlet hole the 12 and the 2nd inlet hole 22.

Embodiment 3 has following effect and effect.(1) the pulsation sound that low pressure acoustic filter 52 prevents the 1st compression chamber 11a and the 2nd compression chamber 21a from occurring is propagated to reservoir 80.(2) even if the caliber of suction nozzle 55a and suction nozzle 55b is little, low pressure acoustic filter 52 can store low-pressure gas, so the gettering efficiency of each compression chamber can improve, the cold of high speed rotating declines and can improve.The internal diameter of the above-mentioned suction nozzle of aperture ratio of (3) the 1st inlet hole the 12 and the 2nd inlet holes 22 is big, so gettering efficiency is higher.

In the present embodiment 1-embodiment 3, compression mechanical part 5 is the internal perisporium using the median septum 50 that rigidity is the highest to be fixed on housing 2, but it is understood that, if the periphery wall using the 2nd cylinder the 21 and the 2nd end plate 45 is fixed on the internal perisporium of housing 2, between periphery wall and the internal perisporium of housing 2 of median septum 50, gap can be set.

Additionally, above-described embodiment 1-embodiment 3 be the application examples representing twin-tub rotation-type compressor, but it is understood that, in the multi-cylinder rotary compressor needing more than 2 median septums, any one median septum can configure low pressure acoustic filter wherein.

Multi-cylinder rotary compressor of the present utility model can be mounted in air-conditioner, refrigerating plant, water heater, vehicle-mounted refrigeration or air condition with camion etc..It addition, rotary compressor of the present utility model can be horizontal multi-cylinder rotary compressor or swing multi-cylinder rotary compressor.

Understand in sum, problem to be solved in the utility model is: connect the compressor of suction nozzle in 2 cylinders respectively, or the multi-cylinder rotary compressor supplied to 2 compression chamber shuntings through the low-pressure gas of 1 suction nozzle, reduce, so cold and compression efficiency can decline due to inspiration capacity when high speed rotating.

This utility model solves the specific embodiment that the problems referred to above use: the low-pressure gas in reservoir 80 from suction nozzle 55 through median septum 50 low pressure acoustic filter 52, be diverted to the 1st cylinder the 11 and the 2nd cylinder 21 by the 1st inlet hole the 12 and the 2nd inlet hole 22 the most respectively.Low pressure acoustic filter 52 has enough volumes, interferes so not producing air-breathing between above-mentioned cylinder.Therefore, in the high speed rotating of 100～150rps, cold and the problem of compression efficiency reduction can be evaded.

Using above-mentioned specific embodiment is the beneficial effect that this utility model brings:

(1) each compression chamber is under the high rotational speeds that inspiration capacity increases, start to obtain respectively the inspiration capacity of necessity and sufficiency from adjacent low pressure acoustic filter.Thereby it can be assured that the cold proportional to the speed of service and prevent compression chamber efficiency from declining.

(2), during the volume enlargement of low pressure acoustic filter, the additional of suction nozzle connecting low pressure acoustic filter is easy, so corresponding compression chamber maximizes advantageous.It addition, the installation site change of suction nozzle is the simplest.

(3) the pulsation sound of the air-breathing produced at compression chamber is due to the decay of low pressure acoustic filter, so, the noise transmission of reservoir can be reduced.

In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.

In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means that the specific features, structure, material or the feature that combine this embodiment or example description are contained at least one embodiment of the present utility model or example.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be to combine in one or more embodiments in office or example in an appropriate manner.Additionally, in the case of the most conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be combined and combine by those skilled in the art.

Although above it has been shown and described that embodiment of the present utility model, it is understandable that, above-described embodiment is exemplary, it is not intended that to restriction of the present utility model, above-described embodiment can be changed in the range of this utility model, revises, replace and modification by those of ordinary skill in the art.

Claims (8)

1. a multi-cylinder rotary compressor, it is characterised in that received compression mechanical part and motor in the housing sealed, Described housing is provided with suction nozzle, and described compression mechanical part includes:

Possess the 1st compression chamber and the 1st cylinder of the 2nd compression chamber and the 2nd cylinder, described 1st cylinder and the described 2nd respectively Cylinder is equipped with slide plate；

It is located at the median septum between described 1st cylinder and described 2nd cylinder；

The piston of eccentric operating is carried out in described 1st compression chamber and described 2nd compression chamber；

Drive the bent axle of two described piston eccentric operating；

The inhaling silencer that described 1st compression chamber possesses with septum intralaminar part respectively with described 2nd compression chamber connects, institute State suction nozzle to connect with described inhaling silencer.

Multi-cylinder rotary compressor the most according to claim 1, it is characterised in that described suction nozzle is located at septum On plate and be at least one.

Multi-cylinder rotary compressor the most according to claim 1, it is characterised in that described 1st cylinder and the described 2nd Being respectively equipped with acoustic filter intercommunicating pore on cylinder, described 1st cylinder and described 2nd cylinder are correspondingly arranged a described air-breathing respectively Pipe, each described suction nozzle is connected with described inhaling silencer by corresponding described acoustic filter intercommunicating pore.

Multi-cylinder rotary compressor the most according to claim 1, it is characterised in that the volume of described inhaling silencer is big In described 1st compression chamber and described 2nd compression chamber discharge capacity and.

Multi-cylinder rotary compressor the most according to claim 3, it is characterised in that the central axis of described suction nozzle is put down Row is arranged.

Multi-cylinder rotary compressor the most according to claim 1, it is characterised in that the periphery wall of septum plate is fixed On the internal perisporium of described housing.

7. a refrigerating circulatory device, it is characterised in that include according to the Multi-cylinder rotation according to any one of claim 1-6 Formula compressor.

Refrigerating circulatory device the most according to claim 7, it is characterised in that one end of described suction nozzle be positioned at described The reservoir of hull outside connects.