CN104755762B - Scroll compressor - Google Patents

Abstract

The present invention provides the scroll compressor of the noise of a kind of specific frequency band that can reduce and produce when using mix refrigerant.The scroll compressor (1) of the present invention possesses: convolution whirlpool dish (30), it is linked to the cam pin (17A) of main shaft (17) in the way of rotatable；Fixed eddy plate (20), it is opposed with convolution whirlpool dish (30) thus forms the discharge chambe being compressed cold-producing medium, and there is end plate, the ejection port (23) that the cold-producing medium after described end plate being formed with by compression sprays towards altitude chamber (10B).Scroll compressor (1) is characterised by, ejection port (23) including: being connected with discharge chambe and having the upstream extremity oral area (23A) of aperture area (A1) is connected with upstream extremity oral area (23A) and aperture area (A2) is more than the downstream oral area (33B) of the aperture area (A1) of upstream extremity oral area (23A), at the joint of the border of upstream extremity oral area (23A) and downstream oral area (23B) generation vibration mode.

Description

Scroll compressor

Technical field

The present invention relates to a kind of scroll compressor constituting the most indoor air-conditioning device.

Background technology

The scroll compressor used in the kind of refrigeration cycle such as air-conditioning device, refrigerating plant possesses fixed eddy plate and convolution whirlpool Dish.Fixed eddy plate, convolution whirlpool dish are that one side side at discoideus end plate is integrally formed with gyrate roll bending wall respectively Component.So that the state of roll bending wall engagement makes this fixed eddy plate opposed with convolution whirlpool dish, make convolution whirlpool dish by motor etc. Circumnutation of revolving round the sun is carried out relative to fixed eddy plate.And, by making the discharge chambe being formed between the roll bending wall of both sides from outward Week, lateral inner circumferential side made its volume reduce while moving, and was thus compressed the compression of the refrigerant gas of indoor.

The refrigerant gas compressed by discharge chambe, by the ejection port being formed on the end plate of fixed eddy plate, flows into and discharges Altitude chamber between lid and housing, then spray towards refrigerant loop from the bleed pipe being arranged on housing.

The performance of scroll compressor or noise can be impacted, therefore by the ejection port being formed on fixed eddy plate Propose various scheme.

Such as in patent documentation 1, improve mechanical efficiency to reduce the pressure loss, it is proposed that formed at ejection port The scheme of bubbler.It addition, in patent documentation 2, in order to realize the low noise of compressor steadily in the long term, it is proposed that solid The upper surface open of the end plate of static vortex disk and the dead room connected with the ejection port of fixed eddy plate.

[citation]

[patent documentation]

Patent documentation 1: Japanese Unexamined Patent Publication 6-66271 publication

Patent documentation 2: Japanese Unexamined Patent Publication 2012-122376 publication

Summary of the invention

[inventing problem to be solved]

In order to suppress environmental pressure, gradually use R410C (near azeotropic mixed refrigerant) or R407C (non-azeotrope mixing system Cryogen) etc. mix refrigerant.When using mix refrigerant, there is the spray of the ejection port of fixed eddy plate as noise Go out the composition in 1k～the 2kHz region of pulsation.According to the research of the present inventor, this noise is not carried by patent documentation 1, patent documentation 2 Go out solution.

The present invention is to complete based on this technical task, its object is to provide one to reduce and is using mixing The scroll compressor of the noise of the specific frequency band produced during cold-producing medium.

[for solving the scheme of problem]

The present inventor is studied to achieve these goals, draws the velocity of sound of mix refrigerant and comprises ejection end The relation of the distance of the refrigerant flow path of mouth can affect the conclusion that noise produces.

In the formula (1) relevant to the velocity of sound, if considering boundary condition, then λ=4L (L:L1 (fixed eddy plate end plate thickness) + L1 (whirlpool dish tooth depth)).

C=f × λ ... (1)

C: the velocity of sound (mm/s) f: frequency (kHz) λ: wavelength (4L)

The velocity of sound of the ejection port of the mix refrigerants such as R410A, 407C is 160～about 180m/s.It addition, will be fixing Whirlpool dish end plate thickness L1 is set to 10～20mm, and whirlpool dish tooth depth L2 is set to 10～20mm.Here, L1 is equivalent to be formed at fixing whirlpool The length of the ejection port on dish end plate, L2 is equivalent to the length of the discharge chambe formed by fixed eddy plate, therefore L with convolution whirlpool dish For the distance from discharge chambe to the refrigerant flow path of ejection port.And, by the velocity of sound (160m/s) of mix refrigerant, refrigeration When distance L of agent path substitutes into formula (1), acoustic features value (f) becomes 1～2kHz.If ejection pulsation is altogether in this frequency band Ring, then easily with other structure components of scroll compressor and structure (below, the general name of the surrounding of scroll compressor For " structure ") resonate, cause the noise from compressor to increase.

Therefore, the present inventor is conceived to regulate acoustic features value to avoid the resonance with structure, and completes the present invention.

The i.e. scroll compressor of the present invention is characterised by possessing: convolution whirlpool dish, it links in the way of rotatable Eccentric axial portion in main shaft；Fixed eddy plate, it is opposed with convolution whirlpool dish thus forms the discharge chambe being compressed cold-producing medium, and And there is end plate, and the ejection port that the cold-producing medium after described end plate being formed by compression sprays towards altitude chamber, spray port Including: it is connected with discharge chambe and there is the upstream extremity oral area of aperture area A1, be connected with upstream extremity oral area and aperture area A2 is big In the downstream oral area of the aperture area A1 of upstream extremity oral area, produce vibration mould on the border of upstream extremity oral area with downstream oral area The abdominal part of formula, the aperture area A2 of upstream extremity oral area vibrates mould according to the relation with the aperture area A1 of upstream extremity oral area to produce The mode of the abdominal part of formula sets.

The scroll compressor of the present invention is different from each other by the aperture area making upstream extremity oral area and downstream oral area Thus the abdominal part of vibration mode is produced on the border of upstream extremity oral area with downstream oral area, the most only make upstream extremity oral area be equivalent to The part of above-mentioned L1.This structure shortens distance L of above-mentioned refrigerant passage such that it is able to will be obtained by formula (1) Acoustic features value regulate higher to avoid the resonance with structure.

Ejection port in the present invention comprises some modes.

About downstream oral area, aperture area A2 can be made constant or periodically on the flow direction of cold-producing medium Or seriality ground expands.The aspect of processability is preferably set to the circular port of equal diameters.

[invention effect]

According to the present invention, by making the aperture area difference of upstream extremity oral area and downstream oral area thus at upstream port The border of portion and downstream oral area produces the abdominal part of vibration mode, thus shortens distance L of refrigerant passage, thus that acoustics is special Value indicative regulates relatively low, it is possible to avoid the resonance with structure.Therefore, the scroll compressor of the present invention can reduce in use The noise of produced specific frequency band during mix refrigerant.

Accompanying drawing explanation

Fig. 1 is the longitudinal section representing the scroll compressor in present embodiment.

Fig. 2 (a) is the partial enlarged drawing of Fig. 1, and Fig. 2 (b) is that the IIb-IIb alignment of Fig. 2 (a) regards sectional view.

Fig. 3 is the figure for illustrating the action effect of the ejection port of the fixed charge method end plate of present embodiment, Fig. 3 A () schematically shows the ejection stream of the cold-producing medium comprising ejection port of present embodiment, Fig. 3 (b) is schematic Show the ejection stream of conventional general cold-producing medium.

Fig. 4 is the figure of the variation of the ejection port representing present embodiment, and Fig. 4 (a) shows under periodically amplifying The example of trip port part, Fig. 4 (b) amplifies the example of downstream oral area with showing seriality.

Detailed description of the invention

Hereinafter, the present invention is described in detail for shown with reference to the accompanying drawings embodiment.

As it is shown in figure 1, the scroll compressor 1 of present embodiment possesses electro-motor 12, by electronic horse in housing 10 Reach the scroll compressor mechanism 2 of 12 drivings.The cold-producing mediums such as R410C, R407C are compressed and to example by this scroll compressor 1 As the refrigerant loop such as air conditioner, fridge supplies.

Housing 10 possesses opening of the upper end of the housing body 101 of the open bottomed cylindrical in upper end, covering housing body 101 The case top 102 of mouth.

It is provided with in the side of housing body 101 and in housing body 101, imports cold-producing medium from not shown memorizer Suction tube 13.

In case top 102, it is provided with the bleed pipe 14 of the cold-producing medium after ejection is compressed by scroll compressor mechanism 2.Shell The inside of body 10 is separated into low-pressure chamber 10A and altitude chamber 10B by discharge cap 25.

Electro-motor 12 possesses stator 15, rotor 16.

Being provided with coil on stator 15, this coil is by by side not shown being arranged on housing body 101 Power subsystem supplies electric power thus produces magnetic field.Rotor 16 possesses permanent magnet with yoke as staple, during this is external Main shaft 17 it is combined with integratedly at the heart.

It is provided with in the both end sides of main shaft 17 across electro-motor 12 and main shaft 17 is supported the upper bearing for rotating 18 and lower bearing 19.

In the receiving space 190 being formed at upper bearing 18, the cam pin 17A of the upper end being arranged on main shaft 17 prominent and It is received.

Scroll compressor mechanism 2 possesses fixed eddy plate 20, carries out the convolution of revolution circumnutation relative to fixed eddy plate 20 Whirlpool dish 30.

Fixed eddy plate 20 possesses fixed charge method end plate 21, erects the gyrate roll bending of setting from a face of fixed charge method end plate 21 22.Fixed eddy plate 20 also possesses ejection port 23 on fixed charge method end plate 21.Ejection port 23 runs through the exterior and the interior of fixed charge method end plate 21, and One end (in the drawings for lower section) is towards the discharge chambe PR opening being formed between fixed eddy plate 20 and convolution whirlpool dish 30, the other end (being top in the drawings) is towards ejection port 27 opening of the discharge cap 25 of the top covering fixed eddy plate 20.

In the present embodiment, ejection port 23 is on the basis of the flow direction F (Fig. 2 (a)) of cold-producing medium, by being positioned at upstream The upstream extremity oral area 23A of side, it is positioned at compared with upstream extremity oral area 23A the downstream oral area 23B at downstream and constitutes.Upstream extremity Oral area 23A is connected with discharge chambe PR, and downstream oral area 23B is connected with upstream extremity oral area 23A.As shown in Fig. 2 (b), upstream port The opening shape of portion 23A is rounded, and its aperture area is set to A1.It addition, the opening shape of downstream oral area 23B is fan, Its aperture area is set to A2.In the present embodiment, the aperture area A2 of downstream oral area 23B is more than upstream extremity oral area 23A Aperture area A1.Further, according to the difference of this aperture area, upstream extremity oral area 23A and downstream oral area 23B is in its boundary portion Divide the abdominal part producing vibration mode.Institute is constituted by upstream extremity oral area 23A and downstream oral area 23B for spraying port 23 like this The action effect produced is aftermentioned.

Convolution whirlpool dish 30 also possesses discoideus convolution end plate 31, erects the vortex of setting from a face of convolution end plate 31 The roll bending 32 of shape.

The back side of the convolution end plate 31 of convolution whirlpool dish 30 is provided with protruding 34, and by bearing in this projection 34 It is assembled with driving lining 36.It is embedded with cam pin 17A in the inner side driving lining 36.Thus, convolution whirlpool dish 30 and main shaft 17 Axle center bias combines, and therefore when main shaft 17 rotates, the whirlpool dish 30 eccentric distance with the axle center away from main shaft 17 that circles round is for convolution half Footpath and rotate (revolution).

It should be noted that in order to not make convolution whirlpool dish 30 rotation while revolution, at convolution whirlpool dish 30 and main shaft 17 Between be provided with constraint rotation not shown partition ring.

Rotation by mutual the eccentric gauge roll bending 22,32 quantitatively and engaged in the way of the 180 degree of phase places that stagger and the whirlpool dish 30 that circles round Corner contacts with each other in multiple positions accordingly.Then, relative to central part (inner peripheral portion) point of vortex of roll bending 22,32 Be asymmetrically formed discharge chambe PR, and along with the convolution of convolution whirlpool dish 30, discharge chambe while making its volume reduce gradually To inner circumferential side shifting.And, the central part cold-producing medium at vortex is farthest compressed.The discharge chambe PR of Fig. 1 shows this Part.

In this scroll compressor mechanism 2, make the volume of the discharge chambe PR being formed between the whirlpool dish 20,30 of both sides in rotation The midway in whirlpool also reduces in the short transverse of roll bending.To this end, fixed eddy plate 20 and convolution whirlpool dish 30 both sides, with outer circumferential side Compare the height reducing roll bending in inner circumferential side, and make in inner circumferential side compared with outer circumferential side opposed with this stair-stepping roll bending right The end plate of side, side is prominent to end plate inner face side.

In order to be started by the scroll compressor 1 of above this structure, electro-motor 12 is carried out excitation, and by inhaling Enter pipe 13 in housing 10, import cold-producing medium.

When electro-motor 12 is excited, main shaft 17 rotates, and is accompanied by this, and convolution whirlpool dish 30 enters relative to fixed eddy plate 20 Row revolution circumnutation.Then, cold-producing medium is compressed in the discharge chambe PR between convolution whirlpool dish 30 and fixed eddy plate 20, and The cold-producing medium of the low-pressure chamber 10A being directed in housing 10 from suction tube 13 is inhaled between convolution whirlpool dish 30 and fixed eddy plate 20. Further, in discharge chambe PR, ejection port 23, the spray of discharge cap 25 of fixed charge method end plate 21 is passed sequentially through by the cold-producing medium after compressing Go out port 27 and spray to altitude chamber 10B, then spray to outside from bleed pipe 14.So, carry out continuously cold-producing medium suction, Compression and ejection.

In the present embodiment, the ejection port 23 of fixed eddy plate 20 is by above-mentioned upstream extremity oral area 23A and downstream port Portion 23B is constituted, and the aperture area A2 of downstream oral area 23B is relatively big compared with the aperture area A1 of upstream extremity oral area 23A, and, Upstream extremity oral area 23A and downstream oral area 23B produces the abdominal part of vibration mode on its border.With reference to the Fig. 3 work to being arranged such Illustrate by effect.

First, the conventional ejection port 123 that the aperture area shown in Fig. 3 (b) is constant is illustrated.By this opening surface Amass and be set to the A1 identical with the upstream extremity oral area 23A of present embodiment.In other words, ejection port 123 and present embodiment Upstream extremity oral area 23A is connected to the structure equivalent of the end in downstream.

In Fig. 3 (b), the following wavelength X in formula (1) is come by the aggregate value of L1 ' following by definition, L2 ', L3 ' Determine.In the case of the ejection port 123 that application is conventional, the vibration mode of stream C1 ' and stream C2 ' is continuous, and stream C3 ' Produce the abdominal part of vibration mode in contrast at its boundary by the stream C1 at upstream side and stream C2.And, just stream Length L of the total of road C1 ' and stream C2 ' ' (L1 '+L2 ') for, when considering boundary condition, λ=4L '.As described above, The velocity of sound in the refrigerant flow path of the mix refrigerants such as R410A, 407C is 160～about 180m/s, by the thickness of fixed charge method end plate Degree (L2 ') is set to 10～20mm, and when whirlpool dish tooth depth (L1 ') is set to 10～20mm, acoustic features value (f) is 1～2kHz (to be set to The situation of c=160m/s).But this may produce the resonance with structure.

C=f × λ ... (1)

C: the velocity of sound (mm/s) f: frequency (kHz) λ: wavelength (4L)

λ=L1 '+L2 '+L3 '

The length of the stream C1 ' of L1 ': the cold-producing medium in discharge chambe PR

The length of the stream C2 ' of the cold-producing medium in L2 ': fixed charge method end plate 21

L3 ': the length of the stream C3 ' of cold-producing medium at downstream compared with fixed charge method end plate 21

Therefore, as shown in Fig. 3 (a) of present embodiment, make the opening of ejection port 23 significantly expand from midway, on The stream (C1, C2) of the cold-producing medium till trip port part 23A and port part 23B downstream are to the stream of the cold-producing medium in downstream (C3) abdominal part of vibration mode is produced between.So, shorten owing to being equivalent to the L of conventional L ', therefore, it is possible to it is special to improve acoustics Value indicative (f), therefore, it is possible to avoid the resonance with structure.Such as, in shape from the position of the 1/4 of the thickness of fixed charge method end plate 21 When becoming downstream oral area 23B, acoustic features value (f) becomes 1.6～3.2kHz.

But, it is possible to easily speculate and arrive, in order to shorten L, if thinning fixed charge method end plate 21.But, solid in order to make Static vortex disk 20 guarantees required intensity, sometimes cannot thinning fixed charge method end plate 21.Particularly, height is required for scroll compressor 1 Speed rotates and lightweight, is thus in being difficult to the fixed charge method end plate 21 of thinning fixed eddy plate 20 in the range of currently allowing, difficult To implement the state of further slimming.Therefore, the knot of the ejection port 23 of present embodiment is configured to the most thinning The important mechanism of resonance with structure is avoided in the case of fixed charge method end plate 21.

It addition, as ejection port 23, by increasing the aperture area of downstream oral area 23B, it is possible to reduce this part The pressure loss of the cold-producing medium at place, the performance that therefore can also contribute to scroll compressor 1 improves.

In the present embodiment, the aperture area A2 of downstream oral area 23B is according to by the opening with upstream extremity oral area 23A The relation of area A1 sets in the way of producing the abdominal part of vibration mode.Furthermore, it is contemplated that the vibration of the structure with surrounding, with Can obtain it can be avoided that set length L2 of upstream port 23A with the mode of acoustic features value (f) of the resonance of structure.Only Vibration test to be simulated just can obtain the length of the aperture area A2 and upstream port 23A of above-mentioned downstream oral area 23B Either one in degree L2.

It should be noted that in the above-described embodiment, show that aperture area is at cold-producing medium as downstream oral area 23B Flow direction on constant example, but the present invention is not limited to this.Such as, as long as the effect of the present invention can be obtained, also Can as Fig. 4 (a) Suo Shi periodically expand downstream oral area 23B, it is also possible to continuous as Fig. 4 (b) Suo Shi Property ground expand downstream oral area 23B.It addition, about upstream extremity oral area 23A, although eliminate diagram, but opening can also be made Area is periodically or seriality ground changes.

It addition, the opening shape of downstream oral area 23B is sector, but the present invention is not limited to this, it is also possible to be other Opening shape, such as circular.

Further, the present invention is carried out by the situation of composition based on 1k～the 2kHz region producing ejection pulsation as noise Illustrate, but this is only an example, naturally it is also possible to apply this to reduce the noise of the composition beyond this scope Bright.

It addition, the opening shape of downstream oral area 23B is arbitrary, and it is not limited to fan.

In addition, without departing from the purport of the present invention, then can accept or reject and select cited by above-mentioned embodiment Structure or be suitably changed to other structures.

[description of reference numerals]

1 scroll compressor

2 scroll compressor mechanisms

10 housings

10A low-pressure chamber

10B altitude chamber

12 electro-motors

13 suction tubes

14 bleed pipes

15 stators

16 rotors

17 main shafts

17A cam pin

18 upper bearings

19 lower bearings

20 fixed eddy plates

22,32 roll bending

23 ejection ports

23A upstream extremity oral area

23B downstream oral area

25 discharge caps

27 ejection ports

30 convolution whirlpool dishes

34 is protruding

36 drive lining

101 housing body

102 case top

21 fixed charge method end plates

31 convolution end plates

Claims (6)

1. a scroll compressor, it is characterised in that possess:

Convolution whirlpool dish, it is linked to the eccentric axial portion of main shaft in the way of rotatable；

Fixed eddy plate, it is opposed with described convolution whirlpool dish thus forms the discharge chambe being compressed cold-producing medium, and has end Plate, the ejection port that the described cold-producing medium after described end plate being formed by compression sprays towards altitude chamber,

Described ejection port includes: is connected with described discharge chambe and has the upstream extremity oral area of aperture area A1 and described upstream Port part is connected and the aperture area A2 downstream oral area more than the aperture area A1 of described upstream extremity oral area, at described upstream extremity The border of oral area and described downstream oral area produces the abdominal part of vibration mode,

The described opening area A2 of described downstream oral area is according to the pass with the described aperture area A1 of described upstream extremity oral area It is to set in the way of producing the described abdominal part of described vibration mode.

Scroll compressor the most according to claim 1, wherein,

The described aperture area A2 of described downstream oral area is constant on the flow direction of described cold-producing medium.

Scroll compressor the most according to claim 1, wherein,

The described aperture area A2 of described downstream oral area periodically or continuously expands.

Scroll compressor the most according to any one of claim 1 to 3, wherein,

The opening shape of described downstream oral area is circular or fan-shaped.

Scroll compressor the most according to any one of claim 1 to 3, wherein,

The opening shape of described upstream extremity oral area is circular.

Scroll compressor the most according to claim 4, wherein,

The opening shape of described upstream extremity oral area is circular.