CN104214073A - Compressor - Google Patents
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- CN104214073A CN104214073A CN201310215663.0A CN201310215663A CN104214073A CN 104214073 A CN104214073 A CN 104214073A CN 201310215663 A CN201310215663 A CN 201310215663A CN 104214073 A CN104214073 A CN 104214073A
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Abstract
The invention discloses a compressor which comprises a pump box, a compression pump, upper elastic pulling parts and lower elastic pulling parts. Concretely, the compression pump is arranged in the pump box, the lower ends of the upper elastic pulling parts are connected with the compression pump, the upper ends of the upper elastic pulling parts are connected with the upper portion of the pump box, the upper ends of the lower elastic pulling parts are connected with the compression pump, and the lower ends of the lower elastic pulling parts are connected with the lower portion of the pump box. According to the compressor, the problem that the compression pump collides with other elements in the compressor due to the excessively large vibration can be avoided, the service life of the compression pump is prolonged, the application environment of the compression pump is improved, vibration attenuation can be rapidly carried out on the compression pump in the operating process of the compression pump, the compression pump can stably run, running stability of the compressor is improved, and the failure rate of the compressor is reduced.
Description
Technical field
The present invention relates to compressed air unit manufacturing technology field, particularly a kind of compressor.
Background technique
In the working procedure of medical air compressor, design a set of shock mitigation system for the vibrations and noise that reduce compressor pump are generally it, as: in the below of compressor pump, beam, damping spring are installed, up with spring suspension etc.But, because of the vibrations in transportation process, jolt, compressor pump being made to produce larger rocking and upwards vibration, as struck other device, will causing damage.Therefore usually before shipping to compressor pump top, below and fill in some sponges or rigid foam around to limit its motion.But the machine of process is like this behind destination, need to open air compressor shell and compress pump box to be taken out by plug thing inside, then installation, test-run a machine, be not easy to assembling and the transport of compressor.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or at least provides a kind of useful business to select.For this reason, one object of the present invention is to propose the little and installation and transportation compressor easily of a kind of vibration.
According to the compressor of the embodiment of the present invention, comprising: draw piece and elasticity pull-down member on pump box, compressor pump, described elasticity.Specifically, described compressor pump is located in described pump box; In described elasticity, the lower end of draw piece is connected with described compressor pump and in described elasticity, the upper end of draw piece is connected with the top of described pump box; The upper end of described elasticity pull-down member is connected with described compressor pump and the lower end of elasticity pull-down member is connected with the bottom of described pump box.
According to the compressor of the embodiment of the present invention, be provided with draw piece and elasticity pull-down member in elasticity, thus, can make compressor pump stable be suspended in compressor pump, the acting in conjunction of draw piece and elasticity pull-down member in elasticity, can avoid compressor pump because of vibrate excessive and cause with other element collisions in compressor, improve working life and the suitable environment of compressor pump, and in compressor pump running, vibration damping can be carried out rapidly to compressor pump, make the operation that compressor pump can be stable, improve the stability of compressor operating, reduce the rate of fault of compressor.
In addition, compressor according to the above embodiment of the present invention, can also have following additional technical characteristics:
According to one embodiment of present invention, in described elasticity, draw piece is four, wherein in two described elasticity draw piece be arranged in symmetrically the first end of described compressor pump both sides and in another two described elasticity draw piece be arranged in the both sides of the second end of described compressor pump symmetrically.Thus, by draw piece in four elasticity, compressor pump is suspended, improve the stability of compressor pump, compressor pump is operated steadily, and when compressor pump produces vibration, in elasticity, draw piece can reduce the vibration of compressor pump uniformly, so that the quick vibration damping of compressor pump, improve the performance of compressor.
According to one embodiment of present invention, described elasticity pull-down member is two, and two described elasticity pull-down members are arranged in the both sides at the middle part of described compressor pump symmetrically.Thus, compressor pump is made to stablize further, limit compressor pump rocking along the longitudinal direction, and limit compressor pump vibration along the vertical direction, make the quick vibration damping of compressor pump, add the stability of compressor pump, and in short-distance transport and using process, in elasticity, the acting in conjunction of draw piece and elasticity pull-down member reduces the wall of compressor pump and pump box or other elements are touched, the vibration & noise of reduction compressor pump.
According to one embodiment of present invention, the bottom of described compressor pump is provided with bracket, and in described elasticity, the lower end of draw piece is connected with described bracket, and the upper end of described elasticity pull-down member is connected with described bracket.Thus, in elasticity, draw piece is connected with compressor pump respectively by bracket with elasticity pull-down member, simplifies compression pump structure, is convenient to assembling and the production of compressor pump.In addition, be also convenient to the connection of draw piece and elasticity pull-down member and compressor pump in elasticity, improve the efficiency of assembling of compressor.
According to one embodiment of present invention, described bracket and described compressor pump are bolted.Thus, bracket can be stablized with compressor pump and coordinate fast, what not only increase pallet and compressor pump coordinates intensity, but also further increasing the efficiency of assembling of compressor.
According to one embodiment of present invention, also comprise fixed block, described fixed block is removably located on described pump box, and described fixed block is connected with described compressor pump.Thus, further can fix compressor pump, in the long-distance transport process of compressor, compressor pump can be reduced and rock, thus avoid because the miscellaneous part in compressor pump and compressor collides and cause damage.In addition, before use compressor, unload fixed block, compressor is suspended.
According to one embodiment of present invention, the bottom of described pump box is provided with air-blowing box, the bottom of described compressor pump is provided with the lower link stretching into described air-blowing box, on the diapire that described fixed block is rotatably located at described air-blowing box and described fixed block be connected by screw thread with described lower link.Thus, by rotary mount, the height of compressor pump can be regulated, and compressor pump can be fixed on the bottom of pump box, avoid compressor in long-distance transport process, cause damage because of rocking of compressor pump, and be convenient to fixed block and be connected with compressor pump.
According to one embodiment of present invention, the bottom surface of described air-blowing box is provided with supporting plate, and described fixed block is screw, and on the lower surface that the head of described fixed block is positioned at described supporting plate and the bar portion of described fixed block is connected with described lower link through described supporting plate.Thus, the height of compressor pump can be regulated by rotary mount, and in immovable point rotation process, only rub with the lower surface of supporting plate, avoid, to wearing and tearing compressor, improve the performance of compressor.
According to one embodiment of present invention, the lower surface of described bracket is provided with feet, and the distance between the inner bottom surface of lower link and described air-blowing box described in the Distance geometry between described feet and the inner bottom surface of described pump box is identical.Thus, support compressor pump by feet, create a further reduction the vibration of compressor pump, be convenient to the transport of compressor, avoid compressor damage, improve the practicability of compressor.
According to one embodiment of present invention, in described elasticity, draw piece is spring, rubber strip or rubber ring, and described elasticity pull-down member is spring, rubber strip or rubber ring.Thus, simply, low price, reduces the cost of compressor to make draw piece and elasticity pull-down member structure in elasticity.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the schematic diagram of the compressor of one embodiment of the present of invention;
Fig. 2 is the sectional view of the local of the compressor of one embodiment of the present of invention;
Fig. 3 is the schematic diagram of the compressor of another embodiment of the present invention;
Fig. 4 is the sectional view of Fig. 3 middle section A-A.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the working procedure of medical air compressor, design a set of shock mitigation system for the vibrations and noise that reduce compressor pump are generally it, as: in the below of compressor pump, beam, damping spring are installed, up with spring suspension etc.But, because of the vibrations in transportation process, jolt, compressor pump being made to produce larger rocking and upwards vibration, as struck other device, will causing damage.Therefore usually before shipping to compressor pump top, below and fill in some sponges or rigid foam around to limit its motion.But the machine of process is like this behind destination, need to open air compressor shell and compress pump box to be taken out by plug thing inside, then installation, test-run a machine, be not easy to assembling and the transport of compressor.For this reason, the present invention proposes a kind of shake little and be convenient to transport compressor.
Describe the compressor of the embodiment of the present invention with reference to the accompanying drawings in detail.
As shown in Figures 1 to 4, according to the compressor of the embodiment of the present invention, comprising: draw piece 30 and elasticity pull-down member 40 in pump box 10, compressor pump 20, elasticity.
Specifically, compressor pump 20 is located in pump box 10, and in other words, have receiving cavity 101 in pump box 10, compressor pump 20 is located in the receiving cavity 101 of pump box 10.In elasticity, the lower end of draw piece 30 is connected with compressor pump 20, and in elasticity, the upper end of draw piece 30 is connected with the top of pump box 10.The upper end of elasticity pull-down member 40 is connected with compressor pump 20, and the lower end of elasticity pull-down member 40 is connected with the bottom of pump box 10.Wherein, in elasticity, draw piece 30 and elasticity pull-down member 40 coordinate for being suspended in pump box 10 by compressor pump 20, to make compressor pump 20 be located in pump box 10, and play the effect of vibration damping.
According to the compressor of the embodiment of the present invention, be provided with draw piece 30 and elasticity pull-down member 40 in elasticity, thus, can make compressor pump 20 stable be suspended in compressor pump 20, the acting in conjunction of draw piece 30 and elasticity pull-down member 40 in elasticity, can avoid compressor pump 20 because of vibrate excessive and cause with other element collisions in compressor, improve working life and the suitable environment of compressor pump 20, and in compressor pump 20 running, vibration damping can be carried out rapidly to compressor pump 20, make the operation that compressor pump 20 can be stable, improve the stability of compressor operating, reduce the rate of fault of compressor.
As depicted in figs. 1 and 2, in some embodiments of the invention, in elasticity, draw piece 30 is four, wherein in two elasticity, draw piece 30 is arranged in the both sides of the first end (namely as shown in Figure 1 one end of compressor pump 20 left direction or vertical paper one end inwards of compressor pump 20 as shown in Figure 2) of compressor pump 20 symmetrically, and in another two elasticity, draw piece 30 is arranged in the both sides of second end (namely as shown in Figure 1 one end of compressor pump 20 right direction or the vertical paper of compressor pump 20 is outside as shown in Figure 2 one end) of compressor pump 20 symmetrically.Specifically, as depicted in figs. 1 and 2, in elasticity, draw piece 30 is four, in first elasticity, draw piece 30 is located at the front side of the left end of compressor pump 20, in second elasticity, draw piece 30 is located at the rear side of the left end of compressor pump 20, in 3rd elasticity, draw piece 30 is located at the front side of the right-hand member of compressor pump 20, and in the 4th elasticity, draw piece 30 is located at the rear side of the right-hand member of compressor pump 20.Thus, by draw piece 30 in four elasticity, compressor pump 20 is suspended, improve the stability of compressor pump 20, compressor pump 20 is operated steadily, when compressor pump 20 produces vibration, in elasticity, draw piece 30 can reduce the vibration of compressor pump 20 uniformly, so that the quick vibration damping of compressor pump 20, improves the performance of compressor.
In addition, in four elasticity, the lower end of draw piece 30 is on same horizontal plane, and in rectangular layout.
Further, as shown in Figures 2 and 3, elasticity pull-down member 40 is two, and two elasticity pull-down members 40 are arranged in the both sides at the middle part of compressor pump 20 symmetrically.The middle part of compressor pump 20 refers to the part between the first end of compressor pump 20 and the second end.Specifically, elasticity pull-down member 40 is two, and first elasticity pull-down member 40 is located at the front side at the middle part of compressor pump 20, and second elasticity pull-down member 40 is located at the rear side at the middle part of compressor pump 20.In other words, first elasticity pull-down member 40 is located at the middle part of the front side of compressor pump 20, second elasticity pull-down member 40 be located at compressor pump 20 the middle part of rear side.Thus, compressor pump 20 is made to stablize further, limit compressor pump 20 rocking along the longitudinal direction, and limit compressor pump 20 vibration along the vertical direction, make compressor pump 20 vibration damping fast, add the stability of compressor pump 20, and in transportation process, in elasticity, the acting in conjunction of draw piece 30 and elasticity pull-down member 40 avoids the wall of compressor pump 20 and pump box 10 or other elements to touch, and avoids compressor pump 20 to damage, improves the working life of compressor.
In addition, above-mentioned to draw piece in elasticity 30 and the quantity of elasticity pull-down member 40 and the description of position, it is only a specific embodiment of the present invention, in actual production process, due to differences such as the working environment of compressor, the sizes of compressor pump 20, quantity and the mounting point of draw piece 30 and elasticity pull-down member 40 in elasticity can be changed.This is for one of ordinary skill in the art will appreciate that.
As shown in Figure 2, in some embodiments of the invention, the bottom of compressor pump 20 is provided with bracket 50, and in elasticity, the lower end of draw piece 30 is connected with bracket 50, and the upper end of elasticity pull-down member 40 is connected with bracket 50.Thus, in elasticity, draw piece 30 is connected with compressor pump 20 respectively by bracket 50 with elasticity pull-down member 40, simplifies the structure of compressor pump 20, is convenient to assembling and the production of compressor pump 20.In addition, be also convenient to the connection of draw piece 30 and elasticity pull-down member 40 and compressor pump 20 in elasticity, improve the efficiency of assembling of compressor.
Advantageously, bracket 50 and compressor pump 20 are bolted.Thus, bracket 50 can be stablized with compressor pump 20 and coordinate fast, what not only increase pallet 50 and compressor pump 20 coordinates intensity, but also further increasing the efficiency of assembling of compressor.
As shown in Figures 2 to 4, in some embodiments of the invention, also comprise fixed block 61, fixed block 61 is removably located on pump box 10, and fixed block 61 is connected with compressor pump 20, for fixing compressor pump 20, reduce compressor pump 20 rocking in transportation process, in other words, compressor pump can be fixed on precalculated position by fixed block 61.Thus, can further fix compressor pump 20, in the transportation process of compressor, compressor pump 20 can be reduced and rock, thus avoid because compressor pump 20 collides with the miscellaneous part in compressor and cause damage.In addition, before the use of compressor, fixed block 61 should be unloaded, compressor is suspended.
Further, the bottom of pump box 10 is provided with air-blowing box 11, and the top of pump box 10 is provided with blower fan 12, for dispelling the heat to compressor pump 20.The bottom of compressor pump 20 is provided with the lower link 62 stretching into air-blowing box 11, and fixed block 61 is rotatably located on the diapire of air-blowing box 11, and fixed block 61 and lower link 62 are threaded connection.Thus, by rotary mount 61, the height of compressor pump 20 can be regulated, and can, by preposition fixing for compressor pump 20, avoid, in the transportation process of compressor, causing damage because of rocking of compressor pump 20, and be convenient to fixed block 61 and be connected with compressor pump 20.
In addition, lower link 62 is located at the lower surface of bracket 50, and lower link 62 and bracket 50 are connected by screw.
Advantageously, as shown in Figure 2, the bottom surface of air-blowing box 11 is provided with supporting plate 63, and fixed block 61 is screw, and the head of fixed block 61 is positioned on the lower surface of supporting plate 63, and the bar portion of fixed block 61 is connected with lower link 62 through supporting plate 63.In other words, fixed block 61 from the bottom up through supporting plate 63, and is threaded connection with lower link 62.Thus, the height of compressor pump 20 can be regulated by rotary mount 61, and in immovable point 61 rotation process, only rub with the lower surface of supporting plate 63, avoid, to wearing and tearing compressor, improve the performance of compressor.
Further, the lower surface of bracket 50 is provided with feet 51, and the Distance geometry lower link 62 between feet 51 and the inner bottom surface of pump box 10 is identical with the distance between the inner bottom surface of air-blowing box 11.In other words, in the process of height being regulated compressor pump 20 by fixed block 61, while the interior earth surface of lower link 62 and air-blowing box 11, feet 51 contacts with the inner bottom surface of pump box 10.Thus, support compressor pump 20 by feet 51, create a further reduction the vibration of compressor pump 20, be convenient to the transport of compressor, avoid compressor damage, improve the practicability of compressor.
In addition, in some embodiments of the invention, in elasticity, draw piece 30 is spring, rubber strip or rubber ring, and elasticity pull-down member 40 is spring, rubber strip or rubber ring.Thus, simply, low price, reduces the cost of compressor to make draw piece 30 and elasticity pull-down member 40 structure in elasticity.
Further, in examples more of the present invention, the internal surface of pump box 10 posts vibration damper plate and sponge, for sound insulation and sound-absorbing.
In addition, also comprise dolly, pump box 10 is located on dolly 70, so that the movement of compressor.
According to some embodiments of the present invention, the basis of conventional spring suspension damping adds the elasticity pull-down member 40 of two downward tractives, more being conducive to the smooth operation of compressor pump 20, when being subject to low amplitude vibrations, vertical tremor and the horizontal jitter of compressor pump 20 can being reduced.In addition, installed lower link 62 additional in the below of the bracket of compressor pump 20, before shipping, fixed block 61 has been screwed into lower link, tight compressor pump 20 can have been pulled down and prevent it movable.
According to concrete examples more of the present invention, compressor pump 20 is screwed on bracket 50, catch on the hole of bracket 50 surrounding with draw piece 30 in four elasticity and hang over the top of pump box 10, front side in the middle part of bracket 50 and rear side are separately installed with elasticity pull-down member 40, are fixed on the bottom of pump box 10 downwards.Such structure is more conducive to the smooth operation of compressor pump 20, when being subject to low amplitude vibrations, can reduce vertical tremor and the horizontal jitter of compressor pump 20.Lower link 62 is equipped with in below in the middle part of bracket 50, fills a feet 51 is respectively housed below 4 angles of bracket 50.Before transport, supporting plate 63 is placed below air-blowing box 11, lower link 62 is screwed into through after supporting plate 63 with screw, along with being constantly screwed into of screw, lower link 62 can move down with compressor pump 20, when the bottom surface of lower link 62 is attached to air-blowing box 11, four feets 51 below bracket 50 are also just in time pressed onto on the inner bottom surface of pump box 10, so namely limit moving upward of compressor pump 20 and also ensure that its stablizing in pump box 10.In transportation process, compressor pump 20 can remain on relatively-stationary position, there will not be large displacement and rocks.After arriving destination, before use screw is backed out, and remove supporting plate 63, compressor pump 20 can be made to suspend, so that the normal operation of compressor pump 20.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (10)
1. a compressor, is characterized in that, comprising:
Pump box;
Compressor pump, described compressor pump is located in described pump box;
Draw piece in described elasticity, in described elasticity, the lower end of draw piece is connected with described compressor pump and in described elasticity, the upper end of draw piece is connected with the top of described pump box;
Elasticity pull-down member, the upper end of described elasticity pull-down member is connected with described compressor pump and the lower end of elasticity pull-down member is connected with the bottom of described pump box.
2. compressor according to claim 1, it is characterized in that, in described elasticity, draw piece is four, wherein in two described elasticity draw piece be arranged in symmetrically the first end of described compressor pump both sides and in another two described elasticity draw piece be arranged in the both sides of the second end of described compressor pump symmetrically.
3. compressor according to claim 2, is characterized in that, described elasticity pull-down member is two, and two described elasticity pull-down members are arranged in the both sides at the middle part of described compressor pump symmetrically.
4. compressor according to claim 1, is characterized in that, the bottom of described compressor pump is provided with bracket, and in described elasticity, the lower end of draw piece is connected with described bracket, and the upper end of described elasticity pull-down member is connected with described bracket.
5. compressor according to claim 4, is characterized in that, described bracket and described compressor pump are bolted.
6. compressor according to claim 4, is characterized in that, also comprises fixed block, and described fixed block is removably located on described pump box, and described fixed block is connected with described compressor pump.
7. compressor according to claim 6, it is characterized in that, the bottom of described pump box is provided with air-blowing box, the bottom of described compressor pump is provided with the lower link stretching into described air-blowing box, on the diapire that described fixed block is rotatably located at described air-blowing box and described fixed block and described lower link be threaded connection.
8. compressor according to claim 7, it is characterized in that, the bottom surface of described air-blowing box is provided with supporting plate, and described fixed block is screw, and on the lower surface that the head of described fixed block is positioned at described supporting plate and the bar portion of described fixed block is connected with described lower link through described supporting plate.
9. compressor according to claim 7, is characterized in that, the lower surface of described bracket is provided with feet, and the distance between the inner bottom surface of lower link and described air-blowing box described in the Distance geometry between described feet and the inner bottom surface of described pump box is identical.
10. the compressor according to any one of claim 1-9, is characterized in that, in described elasticity, draw piece is spring, rubber strip or rubber ring, and described elasticity pull-down member is spring, rubber strip or rubber ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310215663.0A CN104214073B (en) | 2013-05-31 | 2013-05-31 | Compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310215663.0A CN104214073B (en) | 2013-05-31 | 2013-05-31 | Compressor |
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| Publication Number | Publication Date |
|---|---|
| CN104214073A true CN104214073A (en) | 2014-12-17 |
| CN104214073B CN104214073B (en) | 2019-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310215663.0A Active CN104214073B (en) | 2013-05-31 | 2013-05-31 | Compressor |
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Cited By (2)
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| CN109441781A (en) * | 2018-12-26 | 2019-03-08 | 南京舒普思达医疗设备有限公司 | A kind of noise-reducing structure of compressor |
| CN109563823A (en) * | 2016-08-09 | 2019-04-02 | 爱信精机株式会社 | Air pump equipment and seat unit |
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| EP1043554A2 (en) * | 1999-04-08 | 2000-10-11 | Matsushita Electric Industrial Co., Ltd. | Refrigeration cycle apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104214073B (en) | 2019-06-25 |
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