CN201837155U - Improved structure of refrigerant recycling filling machine - Google Patents
Improved structure of refrigerant recycling filling machine Download PDFInfo
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- CN201837155U CN201837155U CN201020574882XU CN201020574882U CN201837155U CN 201837155 U CN201837155 U CN 201837155U CN 201020574882X U CN201020574882X U CN 201020574882XU CN 201020574882 U CN201020574882 U CN 201020574882U CN 201837155 U CN201837155 U CN 201837155U
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Abstract
The utility model discloses an improved structure of a refrigerant recycling filling machine, which comprises four external pipelines, wherein the first external pipeline is sequentially connected with a filtering device, a first valve, a compressor, a condenser, a filter, a fourth valve and a second external pipeline. Simultaneously, a third valve is connected onto a pipeline between the first valve and the compressor by the aid of an external pipeline; an outlet of a third valve is divided into two branches; one branch is connected with the third external pipeline after being connected with a second valve; the other branch is directly connected with the fourth external pipeline; a fifth valve is connected outside an outlet of the compressor and communicated with an exhaust port; and the compressor is an oil-free scroll compressor integrating double functions of a combined plunger type compressor and a vacuum pump. The improved structure is applicable to wide-range extraction, suction and filling of refrigerant media in different states, and has the advantages of high efficiency, low noise and simplicity and convenience in operation. Simultaneously, oil-free lubrication is realized in an operating cavity of the compressor, and pollution of lubricating oil to the refrigerant media is eradicated.
Description
Technical field
The utility model relates to a kind of refrigerant recovering charging machine, particularly a kind of structure-improved of refrigerant recovering charging machine.
Background technology
When refrigeration system such as air-conditioning system and large-scale icebox is keeped in repair at the use scene,,, all need the refrigerant medium is reclaimed and filling work simultaneously also in order to reduce maintenance cost for reducing the infringement that secondary refrigerant leakage causes ozone layer.
Yet existing refrigerant recovering charging machine all is to adopt rolling piston compressor that the refrigerant medium is reclaimed, compresses on internal structure, adopts vavuum pump that refrigeration system is carried out preceding the vacuumizing of refrigerant medium filling.The double structure setting of this compressor and vavuum pump, make existing refrigerant recovering charging machine refrigerant recovering and the filling course of work in complex operation, inefficiency, the execute-in-place technical difficulty is big.
In addition, because the structural limitations of rolling piston compressor, make the refrigerant recovering charging machine when the liquid cold media matter of suction, for the liquid refrigerants medium that prevents to suck hits the cylinder phenomenon in compressor, avoid causing the compressor damage of components, need in the refrigerant recovering charging machine, to be provided with expansion valve and evaporimeter and make liquid medium gasification earlier, also needing simultaneously to switch the refrigerant medium enters the passage of compressor or adjusts the flow that the refrigerant medium enters the compressor passage by valve, guarantee the security of operation of equipment with the method that lowers efficiency, in the liquid cold media matter of whole suction process, the fuselage heating is high, and noise is big.And when suction gaseous coolant medium, because of rolling piston compressor is depended merely on the compression that leather cup carries out High Pressure Difference, leak big in the compression process, heating is high, operation stability is poor, rolling piston compressor is owing to existing crashproof exhaust dead space, so rolling piston compressor is unfavorable for work on the spot at suction, the inefficiency of compressed gaseous refrigerant medium, noise height simultaneously.In addition, all there is oil lubrication in the working chamber of rolling piston compressor and vavuum pump, has the pollution to the refrigerant medium during work.
The utility model content
At the problems referred to above, the utility model has designed a kind of structure-improved of refrigerant recovering charging machine, it adopts in conjunction with rolling piston compressor and vavuum pump are difunctional and is the oil-free scroll compressor of one, can be applicable to wide region suction, compression, fill the refrigerant medium of different conditions, have high efficiency, low noise, characteristics easy and simple to handle, realized oil-free lubrication in the working chamber of compressor simultaneously, stopped the pollution of lubricating oil the refrigerant medium.
For achieving the above object, the utility model is by the following technical solutions:
A kind of structure-improved of refrigerant recovering charging machine is characterized in that: comprise four external pipes, wherein first external pipe connects filter, first valve, compressor, condenser, filter, the 4th valve and second external pipe in regular turn; External pipeline connects the 3rd valve on the pipeline between first valve and the compressor simultaneously, the outlet of the 3rd valve is divided into two branch roads, one of them branch road is connected with the 3rd external pipe after connecting second valve, and another branch road then directly connects portion's pipeline all round; The outlet of described compressor is circumscribed with one the 5th valve and is communicated with exhaust outlet.
Be provided with first Pressure gauge between the above-mentioned filter and first valve.
Above-mentioned the 4th valve and second external pipe are provided with the 4th Pressure gauge.
Be provided with the 3rd Pressure gauge between above-mentioned first valve and the 3rd valve.
Be provided with second Pressure gauge between above-mentioned second valve and the 3rd external pipe.
Above-mentioned compressor is the oil-free scroll compressor, and it comprises quiet dish of vortex and eddy spinner disk; The quiet dish of its mesoscale eddies is provided with quiet dish tooth and forms the teeth groove structure, and the teeth groove structure centre is provided with primary outlet; Described eddy spinner disk is provided with the Moving plate tooth and makes circular translational in the teeth groove of the quiet dish of vortex, and the outer flank of tooth of quiet dish tooth that the Moving plate tooth inner toothed surface of eddy spinner disk is close to the quiet dish of vortex is done slide displacement; Be provided with pressure Automatic Balance Regulation structure in the described teeth groove structure simultaneously.
Above-mentioned pressure Automatic Balance Regulation structure comprises several bypass that is communicated with primary outlet outlets that are provided with at interval in the teeth groove structure, is provided with in each bypass outlet and opens the pressure balance control valve that carries out pressure release automatically when pressure surpasses predetermined value.
The cavity volume of piezodielectric is just inhaled in the outer formed engagement of the flank of tooth space of the quiet dish tooth of the Moving plate tooth inner toothed surface of the utility model eddy spinner disk and the quiet dish of vortex for screw compressor.Whole screw compressor is divided into its inner space by quiet dish of vortex and eddy spinner disk the cavity volume of several suction piezodielectrics that seal mutually.When eddy spinner disk is made circular translational with respect to the quiet dish of vortex, its inside is cut apart and the cavity volume of sealing is mutually done cyclically-varying from large to small, the medium that is inhaled into cavity volume is progressively pushed, until the cavity volume that is discharged from screw compressor with cavity volume variation from large to small.
Whole when being gaseous medium when what suck, under the circular translational of eddy spinner disk with respect to the quiet dish of vortex, after in case the cavity volume of suction piezodielectric is closed, the space of cavity volume will be reduced gradually, gaseous medium is progressively compressed, pressure stability in the cavity volume rises, even but conversion moves to last primary outlet, the minimum that cavity volume dwindles, pressure wherein also is not enough to be higher than the automatic deloading setup pressure value of pressure balance control valve in each bypass outlet, and in whole process, the pressure balance control valve in the bypass outlet is attonity all the time, be in closed condition, all gaseous mediums will be discharged by primary outlet.
And when be inhaled into be gas-liquid blending agent or liquid medium the time, under the circular translational of eddy spinner disk with respect to the quiet dish of vortex, after in case the cavity volume of suction piezodielectric is closed, the space of cavity volume will be reduced gradually, the pressure that liquid medium in the cavity volume is subjected to will rise rapidly, when cavity volume transforms to a bypass outlet, when if this moment, liquid medium pressure was lower than the automatic deloading setup pressure value of pressure balance control valve in this bypass outlet, the pressure balance control valve keeps being failure to actuate, be in closed condition, and if liquid medium pressure is when being higher than the automatic deloading setup pressure value of this pressure balance control valve, the pressure balance control valve will be opened automatically, make the liquid medium of overpressure restricted part discharge compressor from this bypass outlet, make the pressure held stationary in the cavity volume, eliminate the liquid medium fluctuation pressure that pressurized produces in cavity volume.Then,, and, reach primary outlet at last, discharge corresponding medium according to judging whether pressure release or not pressure release through out-of-date pressure gradually through each bypass outlet along with the continuation running transform of cavity volume.
The utility model structure is compared tradition recovery charging machine and is had the following advantages:
One: reclaim charging machine when the refrigerant medium of suction refrigeration system, because what adopted is the oil-free scroll compressor with pressure automatic balance control system, so the refrigerant medium that is sucked is had the adaptive ability of the wide category of gas-liquid attitude, no matter the refrigerant medium is liquid state or gaseous state, operate as normal at full capacity has high efficiency, characteristics that noise is low.
Two: when suction refrigerant medium, because the oil-free scroll compressor is when compressing the refrigerant medium, what its compression process adopted is multi-cavity compression continuously synchronously, adjacent constricted zone pressure reduction is little, leak little, so this refrigerant medium reclaim charging machine when suction, compressed gaseous refrigerant medium heating less, high efficiency.
Three: when suction refrigerant medium, because the oil-free scroll compressor is when compressing the refrigerant medium, be when moving scroll plate is made circular translational with respect to fixed scroll, carry out the working cycles of air-breathing, compression, exhaust continuously, do not have dead space in the compression process, recovering effect is better.
Four: realized oil-free lubrication in the working chamber of compressor, stopped the pollution of lubricating oil to the refrigerant medium.
Five, when vacuumizing, annotating the refrigerant medium, do not need to dispose separately, start vaccum pump unit, difunctional oil-free scroll compressor just can be finished by a machine by the functional module conversion of control system, has designs simplification, simple to operate, the characteristics that automaticity is high.
To sum up, it adopts the utility model in conjunction with rolling piston compressor and vavuum pump are difunctional and is the oil-free scroll compressor of one, can be applicable to wide region suction, compression, fill the refrigerant medium of different conditions, have high efficiency, low noise, characteristics easy and simple to handle, realized oil-free lubrication in the working chamber of compressor simultaneously, stopped the pollution of lubricating oil the refrigerant medium.
Description of drawings
Fig. 1, topology layout schematic diagram of the present utility model;
The quiet dish of vortex of Fig. 2, the utility model oil-free scroll compressor and the front view of eddy spinner disk;
Fig. 3, structure cutaway view of the present utility model;
Fig. 4, fundamental diagram of the present utility model;
Fig. 5, operation principle block diagram of the present utility model.
The specific embodiment
As shown in Figure 1, a kind of structure-improved of refrigerant recovering charging machine comprises four external pipes, and it is respectively first external pipe 11, second external pipe 12, the 3rd external pipe 13 and portion's pipeline 14 all round.Wherein first external pipe 11 connects filter 2, first valve 31, compressor 4, condenser 5, filter 6, the 4th valve 34 and second external pipe 12 in regular turn; External pipeline connects the 3rd valve 33 on the pipeline between first valve 31 and the compressor 4 simultaneously, the outlet of the 3rd valve 33 is divided into two branch roads, one of them branch road connects second valve 32 back and is connected with the 3rd external pipe 13, and another branch road then directly connects the portion's pipeline 14 all round; The outlet of described compressor 4 is circumscribed with one the 5th valve 35 and is communicated with exhaust outlet 351.Be provided with first Pressure gauge 71 between the filter 2 and first valve 31 simultaneously.The 4th valve 34 and second external pipe 12 are provided with the 4th Pressure gauge 74.Be provided with the 3rd Pressure gauge 73 between first valve 31 and the 3rd valve 33.Be provided with second Pressure gauge 72 between second valve 32 and the 3rd external pipe 13.
Shown in Fig. 2-5, described compressor 4 is the oil-free scroll compressor, and this oil-free scroll compressor comprises quiet dish 41 of vortex and eddy spinner disk 42.The quiet dish 41 of its mesoscale eddies is provided with quiet dish tooth 411 and forms the teeth groove structure, and the teeth groove structure centre is provided with primary outlet 412.Described eddy spinner disk 42 is provided with Moving plate tooth 421 and makes circular translational in the teeth groove of the quiet dish of vortex, and the outer flank of tooth that Moving plate tooth 421 inner toothed surface of eddy spinner disk 42 are close to the quiet dish tooth 411 of the quiet dish of vortex is done slide displacement.Be provided with pressure Automatic Balance Regulation structure in the described teeth groove structure simultaneously.
Described pressure Automatic Balance Regulation structure comprises several bypass that is communicated with primary outlet 412 outlets 4112 that are provided with at interval in the teeth groove structure, in practice, the number of bypass outlet 4112 is set according to actual needs, be provided with two in the present embodiment, it is respectively bypass outlet A and bypass outlet B, is provided with in each bypass outlet A, B and opens the pressure balance control valve 4113 that carries out pressure release automatically when pressure surpasses predetermined value.
The cavity volume 3 of piezodielectric is just inhaled in the formed engagement of the flank of tooth space of the utility model eddy spinner disk Moving plate tooth 421 flank of tooth and the quiet dish tooth 411 of the quiet dish of vortex for screw compressor.Whole screw compressor is divided into its inner space by quiet dish 41 of vortex and eddy spinner disk 42 cavity volume 43 of several suction piezodielectrics that seal mutually.When eddy spinner disk 42 is made circular translational with respect to the quiet dish 41 of vortex, its inside is cut apart and the cavity volume 43 of sealing is mutually done cyclically-varying from large to small, the medium that is inhaled into cavity volume 43 is with cavity volume 43 variation from large to small, progressively pushed, until the cavity volume 43 that is discharged from screw compressor.
Whole when being gaseous medium when what suck, under the circular translational of eddy spinner disk 42 quiet dish 41 with respect to vortex, after in case the cavity volume 43 of suction piezodielectric is closed, the engagement space of the quiet dish 41 of eddy spinner disk 42 and vortex is that the space of cavity volume 43 will be reduced gradually, gaseous medium is progressively compressed, pressure stability in the cavity volume 43 rises, even but conversion moves to last primary outlet 412, cavity volume 43 narrows down to minimum, pressure wherein also is not enough to be higher than bypass outlet A, the automatic deloading setup pressure value of pressure balance control valve 4113 among the B, in whole process, bypass outlet A, pressure balance control valve 4113 among the B is attonity all the time, be in closed condition, all gaseous mediums will be discharged by primary outlet 412.Its entire work process is the same with existing screw compressor.
And when be inhaled into be gas-liquid blending agent or liquid medium the time, under the circular translational of eddy spinner disk 42 quiet dish 41 with respect to vortex, after in case the cavity volume 43 of suction piezodielectric is closed, the space of cavity volume 43 will be reduced gradually, the pressure that liquid medium in the cavity volume 43 is subjected to will rise rapidly, when cavity volume 43 transforms to a bypass outlet A, when if this moment, liquid medium pressure was lower than the automatic deloading setup pressure value of pressure balance control valve 4113 among the bypass outlet A, pressure balance control valve 4113 keeps being failure to actuate, be in closed condition, and if liquid medium pressure is when being higher than the automatic deloading setup pressure value of this pressure balance control valve 4113, pressure balance control valve 4113 will be opened automatically, make the liquid medium of overpressure restricted part discharge cavity volume 43 from this bypass outlet, make the pressure held stationary in the cavity volume 43, eliminate the liquid medium fluctuation pressure that pressurized produces in cavity volume 43, and other a part of medium exists in cavity volume 43 along with cavity volume 43 moves.Then along with the continuation circular motion of the quiet dish 41 of eddy spinner disk 42 relative vortexs, the cavity volume 43 that is formed by the engagement space further reduces, medium in the cavity volume 43 continues to be squeezed, when cavity volume 43 moves to bypass outlet B, pressure according to this moment judges whether pressure release or not pressure release, reach primary outlet at last, discharge corresponding medium.
The utility model is when carrying out conventional refrigerant recovering function, and first valve 31 is opened, and the 4th valve 34 is opened, and second valve 32 is closed, and the 3rd valve 33 is closed, and the 5th valve 35 is closed.Refrigerant medium in the refrigeration system 9 enters the refrigerant medium by first external pipe 11 and reclaims in the charging machine, then by entering the working chamber of difunctional oil-free scroll compressor 4 behind filtration 2, first valve 31, at this moment, be arranged on the refrigerant medium current pressure of first Pressure gauge, 71 demonstrations, first external pipe, 11 inside of first valve, 31 fronts; Be arranged on difunctional oil-free scroll compressor 4 pressure inside Automatic Balance Regulation valves 4113 control recovery charging machine operating pressure in the working chamber when suction, compressed liquid refrigerant medium automatically, when the state of refrigerant medium by liquid state to the gaseous state transition, pressure Automatic Balance Regulation valve 4113 can make the recovery charging machine be in the high efficiency state all the time when reclaiming the refrigerant medium along with the unlatching of automatic adjustment control valve 4113 valves of the change of refrigerant medium state.Then the refrigerant medium of being discharged by compressor passes through condenser 5, filter 6, the 4th valve 34, and enters fluid reservoir 8 through second external pipe 12, at this, is connected the current pressure that the 4th valve 34 the 4th Pressure gauge 74 afterwards shows fluid reservoirs 8 inside.When the 4th Pressure gauge 74 sends the alarm signal that reaches the setting safety value; difunctional oil-free scroll compressor 4 is shut down; the 4th valve 34 is closed; first valve 31 is closed; the refrigerant medium reclaims the recovery function that charging machine is closed the refrigerant medium automatically; and entering into the self-cleaning function that reclaims charging machine automatically, control system enters holding state automatically.
When the refrigerant recovering charging machine carries out self-cleaning function, first valve 31 is closed, second valve 32 is closed, the 5th valve 35 is closed, the 3rd valve 33 is opened, the 4th valve 34 is opened, a spot of gaseous state cleaning refrigerant from fluid reservoir 8 through all round portion's pipeline 14 enter into the inside that the refrigerant medium reclaims charging machine, enter the working chamber of difunctional oil-free scroll compressor 4 inside by the 3rd valve 33 and internal pipeline, wrap up in and lead out remaining in refrigerant medium that working chamber contains impurity, and through condenser 5, filter 6 and the 4th valve 34, second external pipe 12 is got back to fluid reservoir 8, realize reclaiming the automatically cleaning work of charging machine, at this, the 3rd Pressure gauge 73 shows the current pressure of the gaseous coolant medium that comes out from fluid reservoir 8.More than work by program setting, after realizing reclaiming the automatically cleaning work of charging machine, difunctional oil-free scroll compressor 4 is shut down, and the 3rd valve 33, the 4th valve 34 are closed automatically.Control system enters holding state automatically.
When refrigerant medium recovery charging machine carried out refrigerant medium filling function, first valve 31 was opened, and the 5th valve 35 is opened, and second valve 32 is closed, and the 3rd valve 33 is closed, and the 4th valve 34 is closed; Start difunctional oil-free scroll compressor 4, gas in the refrigeration system 9 and remaining aqueous vapor and other impurity are drawn out of refrigeration system by first external pipe 11, and enter difunctional oil-free scroll compressor 4 by filtration 2, first valve 31, at this moment, first Pressure gauge 71 shows the current pressure (vacuum) of refrigeration system 9, the gas of discharging from difunctional oil-free scroll compressor 4 working chambers passes through the 5th valve 35 to exhaust outlet 351, pumped gas is discharged the refrigerant medium reclaim charging machine; When the current pressure of being taken out refrigeration system 9 reached the controlling value of setting, control system was closed first valve 31 automatically, difunctional oil-free scroll compressor 4 is shut down, and the 5th valve 35 is closed, and system finishes the work that vacuumizes to refrigeration system.Then second valve 32 is opened automatically, and the refrigerant media in the fluid reservoir 8 are by the portion's pipeline 14, the second valves 32 all round, and the 3rd external pipe 13 enters into the pressure state that refrigeration system 9, the second Pressure gauges 72 show that refrigeration system 9 is current; When second Pressure gauge, 72 surveying work states reached setting value, control system was sent instruction, closes second valve 32, and system finishes the filling work of refrigerant medium.
The utility model structure is compared tradition recovery charging machine and is had the following advantages:
One: reclaim charging machine when the coolant media of suction refrigeration system, because what adopt is the oil-free turbo-compressor 4 with automatic pressure-balancing control system, so the coolant media that is sucked is had the adaptive ability of the wide category of liquid state, no matter coolant media is liquid state or gaseous state, can work at full capacity, have high efficiency, characteristics that noise is low.
Two: when the suction coolant media, because oil-free turbo-compressor is when compressing coolant media, what its compression process adopted is synchronously continuously compression of multi-cavity, adjacent constricted zone pressure reduction is little, leak little, so this coolant media reclaim charging machine when suction, compression refrigerant medium heating less, high efficiency.
Three: when the suction coolant media, because oil-free turbo-compressor is when compressing coolant media, be when orbiter is made circular translational with respect to fixed scroll, carry out continuously the operation cycle of air-breathing, compression, exhaust, do not have dead space in the compression process, recovering effect is better.
Four: realized oil-free lubrication in the working chamber of compressor, stopped the pollution of lubricating oil to coolant media.
Five, vacuumize, when annotating coolant media, do not need to dispose separately, start vaccum pump unit, difunctional oil-free turbo-compressor just can be finished by a machine by the functional module conversion of control system, has designs simplification, simple to operate, the characteristics that automaticity is high.
To sum up, it adopts the utility model in conjunction with rolling piston compressor and the difunctional oil-free turbo-compressor that is integrated of vavuum pump, can be applicable to wide region suction, compression, fill the coolant media of different conditions, have high efficiency, low noise, characteristics easy and simple to handle, realize oil-free lubrication in the working chamber of compressor simultaneously, stopped the pollution of lubricating oil to coolant media.
Claims (7)
1. the structure-improved of a refrigerant recovering charging machine, it is characterized in that: comprise four external pipes, wherein first external pipe connects filter, first valve, compressor, condenser, filter, the 4th valve and second external pipe in regular turn; External pipeline connects the 3rd valve on the pipeline between first valve and the compressor simultaneously, the outlet of the 3rd valve is divided into two branch roads, one of them branch road is connected with the 3rd external pipe after connecting second valve, and another branch road then directly connects portion's pipeline all round; The outlet of described compressor is circumscribed with one the 5th valve and is communicated with exhaust outlet.
2. the structure-improved of a kind of refrigerant recovering charging machine as claimed in claim 1 is characterized in that: be provided with first Pressure gauge between the described filter and first valve.
3. the structure-improved of a kind of refrigerant recovering charging machine as claimed in claim 1 is characterized in that: described the 4th valve and second external pipe are provided with the 4th Pressure gauge.
4. the structure-improved of a kind of refrigerant recovering charging machine as claimed in claim 1 is characterized in that: be provided with the 3rd Pressure gauge between described first valve and the 3rd valve.
5. the structure-improved of a kind of refrigerant recovering charging machine as claimed in claim 1 is characterized in that: be provided with second Pressure gauge between described second valve and the 3rd external pipe.
6. the structure-improved of a kind of refrigerant recovering charging machine as claimed in claim 1 is characterized in that: described compressor is the oil-free scroll compressor, and it comprises quiet dish of vortex and eddy spinner disk; The quiet dish of its mesoscale eddies is provided with quiet dish tooth and forms the teeth groove structure, and the teeth groove structure centre is provided with primary outlet; Described eddy spinner disk is provided with the Moving plate tooth and makes circular translational in the teeth groove of the quiet dish of vortex, and the outer flank of tooth of quiet dish tooth that the Moving plate tooth inner toothed surface of eddy spinner disk is close to the quiet dish of vortex is done slide displacement; Be provided with pressure Automatic Balance Regulation structure in the described teeth groove structure simultaneously.
7. the structure-improved of a kind of refrigerant recovering charging machine as claimed in claim 6, it is characterized in that: described pressure Automatic Balance Regulation structure comprises several bypass that is communicated with primary outlet outlets that are provided with at interval in the teeth groove structure, is provided with in each bypass outlet and opens the pressure balance control valve that carries out pressure release automatically when pressure surpasses predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020574882XU CN201837155U (en) | 2010-10-25 | 2010-10-25 | Improved structure of refrigerant recycling filling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020574882XU CN201837155U (en) | 2010-10-25 | 2010-10-25 | Improved structure of refrigerant recycling filling machine |
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| Publication Number | Publication Date |
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| CN201837155U true CN201837155U (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201020574882XU Expired - Lifetime CN201837155U (en) | 2010-10-25 | 2010-10-25 | Improved structure of refrigerant recycling filling machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438629A (en) * | 2013-08-22 | 2013-12-11 | 冯亦王 | Multi-functional refrigerant machine |
| CN104236183A (en) * | 2013-06-14 | 2014-12-24 | 上汽通用五菱汽车股份有限公司 | Filling gun of refrigerant filling machine |
| WO2023279725A1 (en) * | 2021-07-06 | 2023-01-12 | 青岛海尔空调器有限总公司 | Refrigerant recovery system and method |
-
2010
- 2010-10-25 CN CN201020574882XU patent/CN201837155U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236183A (en) * | 2013-06-14 | 2014-12-24 | 上汽通用五菱汽车股份有限公司 | Filling gun of refrigerant filling machine |
| CN104236183B (en) * | 2013-06-14 | 2017-08-18 | 上汽通用五菱汽车股份有限公司 | A kind of refrigerant filling machine filling gun |
| CN103438629A (en) * | 2013-08-22 | 2013-12-11 | 冯亦王 | Multi-functional refrigerant machine |
| WO2023279725A1 (en) * | 2021-07-06 | 2023-01-12 | 青岛海尔空调器有限总公司 | Refrigerant recovery system and method |
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| GR01 | Patent grant | ||
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Granted publication date: 20110518 |
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| CX01 | Expiry of patent term |