CN204003473U - For the compressing mechanism of oscillating compressor and there is its oscillating compressor - Google Patents
For the compressing mechanism of oscillating compressor and there is its oscillating compressor Download PDFInfo
- Publication number
- CN204003473U CN204003473U CN201420437000.3U CN201420437000U CN204003473U CN 204003473 U CN204003473 U CN 204003473U CN 201420437000 U CN201420437000 U CN 201420437000U CN 204003473 U CN204003473 U CN 204003473U
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- piston
- piston ring
- compressing mechanism
- bent axle
- slide plate
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Abstract
The utility model discloses a kind of compressing mechanism for oscillating compressor and there is its oscillating compressor.Compressing mechanism comprises: cylinder, bent axle, piston, slide plate and piston ring, the slide plate chamber that has compression chamber in cylinder and be communicated with compression chamber.Bent axle is through compression chamber.Piston jacket is on bent axle and be located at rotationally in compression chamber.Slide plate is located in slide plate chamber slidably and one end of slide plate is fixedly attached to the outer circumferential face of piston.Piston ring is enclosed within outward on bent axle and between crankshaft and piston so that bent axle drives piston rotation by piston ring.According to compressing mechanism of the present utility model, can make the temperature uneven phenomenon of piston weaken, even eliminate, can avoid piston to occur thermal expansion uneven phenomenon, avoid leaking between uneven end, cylinder and the piston that causes cylinder of thermal expansion because of piston, promoted the efficiency of compressor.
Description
Technical field
The utility model relates to refrigerating field, especially relates to a kind of compressing mechanism for oscillating compressor and has its oscillating compressor.
Background technique
Oscillating compressor in correlation technique is due to piston and slide plate are processed into one, cause the piston can not rotation in operation process, while being the pump housing running of oscillating compressor, piston only revolves round the sun around cylinder axis in cylinder, and the rotation of piston itself disappears.Owing to there being larger temperature difference between cylinder chamber's inner high voltage chamber and low pressure chamber, when not time rotational of piston, will cause piston to be distributed in the portion temperature of hyperbaric chamber and low pressure chamber different, so when piston operation, piston will cause that along the temperature difference producing on circumference the differentiated phenomenon of thickness direction thermal expansion appears in piston.
Simultaneously cylinder is arranged in the housing that has been full of the pressurized gas of discharging and refrigeration oil, and its thermal expansion can think along being roughly uniform on the circumference of cylinder chamber, and the thickness of cylinder is by the maximum heat swell increment design of pre-estimating.Its result is exactly, for the end face of the low temperature side wall section of the swell increment minimum contacting with induction chamber of piston, just has done greatly in gap between piston and cylinder, thereby can produce Leakage Gas the problem to suction side gas-heated, and make the volumetric efficiency of compressor low.
Model utility content
The utility model is intended to solve at least to a certain extent one of technical problem in correlation technique.
For this reason, an object of the present utility model is to propose a kind of compressing mechanism for oscillating compressor, and the temperature uneven phenomenon of piston is weakened.
Another object of the present utility model is to propose a kind of oscillating compressor with above-mentioned compressor structure.
According to the compressing mechanism for oscillating compressor of the present utility model, comprising: cylinder, the slide plate chamber that there is compression chamber in described cylinder and be communicated with described compression chamber; Bent axle, described bent axle is through described compression chamber; Piston, described piston jacket is on described bent axle and be located at rotationally in described compression chamber; Slide plate, described slide plate is located in described slide plate chamber slidably and one end of described slide plate is fixedly attached to the outer circumferential face of described piston; Piston ring, described piston ring is enclosed within outward on described bent axle and between described bent axle and described piston so that described bent axle drives described piston rotation by described piston ring.
According to the compressing mechanism for oscillating compressor of the present utility model, by be provided with piston ring between crankshaft and piston, piston ring not only can revolve round the sun can also rotation, in the process of piston ring rotation, the heat of the part that is positioned at hyperbaric chamber of piston is delivered in the part that is positioned at low pressure chamber of piston, thereby can make the temperature uneven phenomenon of piston weaken, even eliminate, can avoid piston to occur thermal expansion uneven phenomenon, avoid the uneven end that causes cylinder of thermal expansion because of piston, between cylinder and piston, leak, promote the efficiency of compressor.
In addition, can also there is following additional technical characteristics according to the above-mentioned compressing mechanism for oscillating compressor of the utility model:
In embodiments more of the present utility model, the periphery wall of described piston ring is provided with the groove extending on the axial direction of described piston ring.
Further, described groove runs through described piston ring in the axial direction of described piston ring.
Preferably, described groove is multiple and is uniformly distributed in the circumferential direction of described piston ring.
In embodiments more of the present utility model, described piston ring is provided with at the oilhole that runs through in the radial direction described piston ring.
Preferably, described oilhole is multiple and is uniformly distributed.
In embodiments more of the present utility model, the periphery wall of described piston ring is provided with multiple reentrant part.
Preferably, the area summation of described multiple reentrant part accounts for the 5%-30% of the area of the periphery wall of described piston ring.
Preferably, the span of the ratio between the degree of depth and the diameter of the female portion of each the female portion is 0.01-0.05.
In embodiments more of the present utility model, the periphery wall of described piston ring is provided with lubricant coating.
According to oscillating compressor of the present utility model, comprise the compressing mechanism above-mentioned according to the utility model.
According to oscillating compressor of the present utility model, by being provided with above-mentioned compressing mechanism, can make the temperature uneven phenomenon of piston weaken, even eliminate, can avoid piston to occur thermal expansion uneven phenomenon, avoid leaking between uneven end, cylinder and the piston that causes cylinder of thermal expansion because of piston, promoted the efficiency of compressor.
Brief description of the drawings
Fig. 1 is the assembling schematic diagram according to the utility model embodiment's compressing mechanism;
Fig. 2 is according to the decomposing schematic representation of the utility model embodiment's compressing mechanism;
Fig. 3 is according to the schematic diagram of an embodiment's of the utility model piston ring;
Fig. 4 is according to the schematic diagram of another embodiment's of the utility model piston ring;
Fig. 5 is according to the schematic diagram of another embodiment's of the utility model piston ring;
Fig. 6 is the part schematic diagram according to another embodiment's of the utility model piston ring;
Fig. 7 is the size schematic diagram of the reentrant part on the piston ring shown in Fig. 6.
Reference character:
Compressing mechanism 100,
Cylinder 1, compression chamber 10, suction chamber (low pressure chamber) 101, ejection chamber (hyperbaric chamber) 102, slide plate chamber 11,
Piston 3, slide plate 4, piston ring 5, groove 50, oilhole 51, reentrant part 52, the first embedded block 6, the second embedded block 7.
Embodiment
Describe embodiment of the present utility model below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment who is described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as 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 side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of instructions such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
Describe in detail according to the utility model embodiment's the compressing mechanism 100 for oscillating compressor below with reference to Fig. 1-Fig. 7.
As depicted in figs. 1 and 2, according to the utility model embodiment's the compressing mechanism 100 for oscillating compressor, comprise: cylinder 1, bent axle (scheming not shown), piston 3, slide plate 4 and piston ring 5, wherein, the slide plate chamber 11 that there is compression chamber 10 in cylinder 1 and be communicated with compression chamber 10.Bent axle is through compression chamber 10.Piston 3 is outer to be enclosed within on bent axle and to be located at rotationally in compression chamber 10.Slide plate 4 is located in slide plate chamber 11 slidably and one end of slide plate 4 is fixedly attached to the outer circumferential face of piston 3, particularly, and slide plate 4 and piston 3 part that is formed in one.Thus by the cooperation of piston 3 and slide plate 4, compression chamber 10 is separated into suction chamber (low pressure chamber) 101 and ejection chamber (hyperbaric chamber) 102, in the time that piston 3 only supports the side wall surface of compression chamber 10 and moves along this side wall surface, the volume-variation in hyperbaric chamber 102 and compress the refrigeration agent in ejection hyperbaric chamber 102.
As depicted in figs. 1 and 2, compressing mechanism 100 also comprises the first embedded block 6 and the second embedded block 7, the first embedded block 6 and the second embedded block 7 are embedded into respectively in the space limiting between slide plate 4 and slide plate chamber 11, thereby by being provided with the first embedded block 6 and the second embedded block 7, not only can limit the movement locus of slide plate 4, can also improve the sealing of compressing mechanism 100 simultaneously.
Piston ring 5 is outer to be enclosed within on bent axle and between crankshaft and piston 3 so that bent axle drives piston 3 to rotate by piston ring 5.In other words, piston ring 5 is outer to be enclosed within on bent axle, and piston 3 is outer to be enclosed within on piston ring 5, from the center of cylinder 1 direction of the periphery wall of cylinder 1, bent axle, piston ring 5 and piston 3 distribute successively.Bent axle drives piston ring 5 to rotate while rotation, and piston ring 5 drives piston 3 to rotate while rotation, thereby realizes the object that crankshaft driving piston 3 rotates.
Need to describe, compressing mechanism 100 also comprises the element such as main bearing (scheming not shown) and supplementary bearing (scheming not shown), and main bearing and supplementary bearing are located at respectively on two end faces of cylinder 1.Traditional piston is owing to occurring thermal expansion inequality, therefore between two of cylinder end faces and main bearing and supplementary bearing, there will be gap respectively and cause the end of cylinder to be leaked, simultaneously traditional piston, owing to there is thermal expansion inequality, therefore also there will be radial leakage between piston and cylinder.
Be enclosed within on bent axle and between crankshaft and piston 3 because piston ring 5 is outer, therefore, in the time that crankshaft driving piston ring 5 rotates, piston ring 5 not only can revolve round the sun together with piston 3, and piston ring 5 is also around self spin axis rotation.Because the periphery wall of piston ring 5 contacts with the inner circle wall of piston 3, therefore in the process of piston ring 5 rotations, piston ring 5 can be delivered to the heat of the part that is positioned at hyperbaric chamber 102 of piston 3 in the part that is positioned at low pressure chamber 101 of piston 3, piston 3 temperature uneven phenomenon are weakened, even eliminate.
According to the utility model embodiment's the compressing mechanism 100 for oscillating compressor, by be provided with piston ring 5 between crankshaft and piston 3, piston ring 5 not only can revolve round the sun can also rotation, in the process of piston ring 5 rotations, the heat of the part that is positioned at hyperbaric chamber 102 of piston 3 is delivered in the part that is positioned at low pressure chamber 101 of piston 3, thereby can make the temperature uneven phenomenon of piston 3 weaken, even eliminate, can avoid piston 3 to occur thermal expansion uneven phenomenon, avoid the uneven end that causes cylinder 1 of thermal expansion because of piston 3, between cylinder 1 and piston 3, leak, promote the efficiency of compressor.
Describe in detail according to the structure of the piston ring 5 of the several specific embodiments of the utility model below with reference to Fig. 3-Fig. 7.
The first embodiment:
As shown in Figure 3, in this embodiment, the periphery wall of piston ring 5 is provided with the groove 50 extending on the axial direction of piston ring 5, and groove 50 runs through piston ring 5 in the axial direction of piston ring 5.Certainly can understand, in the axial direction of piston ring 5, groove 50 also can not run through piston ring 5.
Groove 50 is 4 and is uniformly distributed in the circumferential direction of piston ring 5.What certainly can understand is, the number of groove 50 is not limited to this, groove 50 can be one, two, more than three or four, thereby by being provided with groove 50, can effectively reduce the area of contact between piston ring 5 and piston 3, reduce the power consumption that both frictions cause, while is due to the existence of groove 50, can play the oily effect of holding, a small amount of lubricant oil is kept in groove 50, improve the lubrication effect between piston ring 5 and piston 3.
The second embodiment:
In this embodiment, piston ring 5 is provided with and is running through in the radial direction the oilhole 51 of piston ring 5, and it can be also multiple that oilhole 51 can be one, when oilhole 51 is while being multiple, multiple oilholes 51 are evenly distributed on piston ring 5, and in other words, oilhole 51 can be multiple and be uniformly distributed.In this embodiment, on the periphery wall of piston ring 5, can be provided with groove 50 and also can not be provided with groove 50, in the time that the periphery wall of piston ring 5 is provided with groove 50, the setting position of oilhole 51 can be divided into three kinds of situations: a kind of situation is that oilhole 51 is arranged in the groove 50 of piston ring 5, another kind of situation is in the part of not establishing groove 50 of oilhole 51 periphery wall that is arranged on piston ring 5, another situation is that oilhole 51 is for multiple, and a part of oilhole 51 is arranged in groove 50, another part oilhole 51 is arranged in the part of not establishing groove 50 of periphery wall of piston ring 5.
Due to the special rigging position of piston ring 5, the lubricant oil at bent axle oil outlet place cannot flow between piston ring 5 and piston 3 normally, therefore larger between piston ring 5 and piston 3 may be in weary oil lubrication state, therefore in this embodiment, by being provided with oilhole 51, lubricant oil between bent axle and piston ring 5 can be flow between piston ring 5 and piston 3 by oilhole 51, improve the lubricating status between piston ring 5 and piston 3.
The 3rd embodiment:
As shown in Figure 4, in this embodiment, the periphery wall of piston ring 5 is provided with four grooves 50, each groove 50 runs through piston ring 5 on the axial direction of piston ring 5, in each groove 50, be provided with and running through in the radial direction the oilhole 51 of piston ring 5 simultaneously, the oilhole 51 in each groove 50 is four and evenly spaced apart.Need to describe, the number of groove 50 and oilhole 51 is all not limited to this, and the number of groove 50 and oilhole 51 can specifically limit according to actual conditions.
Therefore in this embodiment, by being provided with oilhole 51, lubricant oil between bent axle and piston ring 5 can be flow between piston ring 5 and piston 3 by oilhole 51, improve the lubricating status between piston ring 5 and piston 3, simultaneously by being provided with groove 50, can effectively reduce the area of contact between piston ring 5 and piston 3, reduce the power consumption that both frictions cause, while is due to the existence of groove 50, can play the oily effect of holding, a small amount of lubricant oil is kept in groove 50, further improves the lubrication effect between piston ring 5 and piston 3.
The 4th embodiment:
As shown in Figure 5, in this embodiment, the periphery wall of piston ring 5 is provided with four grooves 50.On the axial direction of piston ring 5, each groove 50 does not run through piston ring 5, and one end of each groove 50 is opened wide and one end sealing.In each groove 50, be provided with and running through in the radial direction the oilhole 51 of piston ring 5 simultaneously, the oilhole 51 in each groove 50 is four and evenly spaced apart.Need to describe, the number of groove 50 and oilhole 51 is all not limited to this, and the number of groove 50 and oilhole 51 can specifically limit according to actual conditions.
Therefore by being provided with oilhole 51, lubricant oil between bent axle and piston ring 5 can be flow between piston ring 5 and piston 3 by oilhole 51, improve the lubricating status between piston ring 5 and piston 3, simultaneously by being provided with groove 50, can effectively reduce the area of contact between piston ring 5 and piston 3, reduce the power consumption that both frictions cause, while is due to the existence of groove 50, can play the oily effect of holding, a small amount of lubricant oil is kept in groove 50, further improves the lubrication effect between piston ring 5 and piston 3.
The 5th embodiment:
As shown in Figure 6 and Figure 7, in this embodiment, the periphery wall of piston ring 5 is provided with multiple reentrant part 52.Each reentrant part 52 can be formed as spherical reentrant part 52 as shown in Figure 7, also can be formed as the cylindrical reentrant part structure that waits.Thereby by being provided with reentrant part 52, can there be a small amount of lubricant oil at these reentrant part 52 places, improves the lubrication effect between piston ring 5 and piston 3, produce hydrodynamic lubrication effect.
Wherein, the area summation of multiple reentrant part 52 accounts for the 5%-30% of the area of the periphery wall of piston ring 5, the opening rate that is equivalent to reentrant part 52 accounts for the 5%-30% of the periphery wall area of piston ring 5, and the span of the ratio h/d between the diameter d of the degree of depth h of each reentrant part 52 and reentrant part 52 is 0.01-0.05, it is best that what now multiple reentrant part 52 were risen improve lubrication effect.
The 6th embodiment:
Consider lubricant oil deficiency between piston ring 5 and piston 3, in weary oil lubrication state, in this embodiment, the periphery wall of piston ring 5 is provided with lubricant coating, this lubricant coating includes metallic composite, particularly, this lubricant coating can be made up of materials such as teflon, fluoropolymer, bulking agents, improves the outer surface of piston ring 5 because of the lubrication effect under weary oil condition.
Be understandable that, six above-mentioned embodiments are illustrating of the structure to piston ring 5 just, the structure of piston ring 5 is not limited to six kinds of above-mentioned embodiments, for example on the outer surface of piston ring 5, can be provided with the groove of spiral extension, here be not specifically limited, as long as ensureing on the basis of structural strength of piston ring 5, can improve the lubrication effect between piston ring 5 and piston 3 in the structure of the outer surface setting of piston ring 5.
According to the utility model embodiment's oscillating compressor, comprise the compressing mechanism 100 according to the utility model above-described embodiment.Need to describe, other structures of oscillating compressor can adopt structure of the prior art, are not just described in detail here.
According to the utility model embodiment's oscillating compressor, by being provided with above-mentioned compressing mechanism 100, can make the temperature uneven phenomenon of piston 3 weaken, even eliminate, can avoid piston 3 to occur thermal expansion uneven phenomenon, avoid leaking between uneven end, cylinder 1 and the piston 3 that causes cylinder 1 of thermal expansion because of piston 3, promoted the efficiency of compressor.
In the utility model, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " 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, First Characteristic Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And, specific features, structure, material or the feature of description can one or more embodiments in office or example in suitable mode combination.In addition,, not conflicting in the situation that, those skilled in the art can carry out combination and combination by the feature of the different embodiments that describe in this specification or example and different embodiment or example.
Although illustrated and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment in scope of the present utility model, amendment, replacement and modification.
Claims (11)
1. for a compressing mechanism for oscillating compressor, it is characterized in that, comprising:
Cylinder, the slide plate chamber that there is compression chamber in described cylinder and be communicated with described compression chamber;
Bent axle, described bent axle is through described compression chamber;
Piston, described piston jacket is on described bent axle and be located at rotationally in described compression chamber;
Slide plate, described slide plate is located in described slide plate chamber slidably and one end of described slide plate is fixedly attached to the outer circumferential face of described piston;
Piston ring, described piston ring is enclosed within outward on described bent axle and between described bent axle and described piston so that described bent axle drives described piston rotation by described piston ring.
2. the compressing mechanism for oscillating compressor according to claim 1, is characterized in that, the periphery wall of described piston ring is provided with the groove extending on the axial direction of described piston ring.
3. the compressing mechanism for oscillating compressor according to claim 2, is characterized in that, described groove runs through described piston ring in the axial direction of described piston ring.
4. according to the compressing mechanism for oscillating compressor described in claim 2 or 3, it is characterized in that, described groove is multiple and is uniformly distributed in the circumferential direction of described piston ring.
5. the compressing mechanism for oscillating compressor according to claim 1 and 2, is characterized in that, described piston ring is provided with at the oilhole that runs through in the radial direction described piston ring.
6. the compressing mechanism for oscillating compressor according to claim 5, is characterized in that, described oilhole is multiple and is uniformly distributed.
7. the compressing mechanism for oscillating compressor according to claim 1, is characterized in that, the periphery wall of described piston ring is provided with multiple reentrant part.
8. the compressing mechanism for oscillating compressor according to claim 7, is characterized in that, the area summation of described multiple reentrant part accounts for the 5%-30% of the area of the periphery wall of described piston ring.
9. the compressing mechanism for oscillating compressor according to claim 7, is characterized in that, the span of the ratio between the degree of depth and the diameter of the female portion of each the female portion is 0.01-0.05.
10. the compressing mechanism for oscillating compressor according to claim 1, is characterized in that, the periphery wall of described piston ring is provided with lubricant coating.
11. 1 kinds of oscillating compressors, is characterized in that, comprise according to the compressing mechanism described in any one in claim 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420437000.3U CN204003473U (en) | 2014-08-04 | 2014-08-04 | For the compressing mechanism of oscillating compressor and there is its oscillating compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420437000.3U CN204003473U (en) | 2014-08-04 | 2014-08-04 | For the compressing mechanism of oscillating compressor and there is its oscillating compressor |
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| Publication Number | Publication Date |
|---|---|
| CN204003473U true CN204003473U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420437000.3U Expired - Fee Related CN204003473U (en) | 2014-08-04 | 2014-08-04 | For the compressing mechanism of oscillating compressor and there is its oscillating compressor |
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| CN (1) | CN204003473U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545741A (en) * | 2016-01-26 | 2016-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Swinging rotor compressor |
| CN116892511A (en) * | 2023-08-25 | 2023-10-17 | 广州航海学院 | Rotary compressor, gas compression system and refrigerating system |
| CN116892511B (en) * | 2023-08-25 | 2024-04-26 | 广州航海学院 | Rotary compressor, gas compression system and refrigerating system |
-
2014
- 2014-08-04 CN CN201420437000.3U patent/CN204003473U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545741A (en) * | 2016-01-26 | 2016-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Swinging rotor compressor |
| CN105545741B (en) * | 2016-01-26 | 2018-11-09 | 珠海格力电器股份有限公司 | A kind of swinging rotor type compressor |
| CN116892511A (en) * | 2023-08-25 | 2023-10-17 | 广州航海学院 | Rotary compressor, gas compression system and refrigerating system |
| CN116892511B (en) * | 2023-08-25 | 2024-04-26 | 广州航海学院 | Rotary compressor, gas compression system and refrigerating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20160804 |