CN107138371A - The processing method of evaporator surface - Google Patents
The processing method of evaporator surface Download PDFInfo
- Publication number
- CN107138371A CN107138371A CN201710230149.2A CN201710230149A CN107138371A CN 107138371 A CN107138371 A CN 107138371A CN 201710230149 A CN201710230149 A CN 201710230149A CN 107138371 A CN107138371 A CN 107138371A
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- Prior art keywords
- evaporator
- nitrogen
- corrosion resistant
- resistant coating
- processing method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0218—Pretreatment, e.g. heating the substrate
- B05D3/0236—Pretreatment, e.g. heating the substrate with ovens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0272—After-treatment with ovens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides a kind of processing method of evaporator surface.The processing method of the wherein evaporator surface includes：Evaporator is put into and is heated to 150 DEG C of debinding furnace and is dried, so that the greasy dirt of evaporator surface occurs flash burn and removed；Nitrogen flushing is carried out to the evaporator for removing surface and oil contaminant using 0.4 0.6Mpa nitrogen；It it is 15 30 DEG C in temperature, relative humidity is less than under 65%, standard atmosphere condition, and corrosion resistant coating is sprayed into evaporator surface；Evaporator after anticorrosion with painting paint is stood and dodges dry to realize；And evaporator is put into is heated to 150 DEG C of debinding furnace and is dried, to utilize the corrosion resistant coating on high temperature drying evaporator surface.The solution of the present invention, unworkable washing or blasting craft can not only be saved, evaporator surface can also be painted using the remaining temperature after drying, be conducive to improving the adhesive force of corrosion resistant coating, lift the treatment effect of evaporator surface, effectively evaporator is prevented to be corroded, so as to extend the service life of evaporator.
Description
Technical field
The present invention relates to refrigeration technology field, more particularly to a kind of processing method of evaporator surface.
Background technology
As society is growing and people's living standard is improved constantly, environment regulation electrical equipment such as air conditioner etc. is increasingly
Popularization, air conditioner has become household electrical appliance essential in people's life.
In the refrigeration system of air conditioner, condenser, evaporator, compressor and choke valve are the big portions of essential four
Part.Wherein compressor is by the liquid that refrigerant compression is high pressure-temperature, and refrigerant is cooled to the liquid of high normal pressure and temperature by condenser,
Choke valve is by the liquid that refrigerant reducing pressure by regulating flow is Room-temperature low-pressure, and evaporator is the equipment of conveying cold in refrigeration system, normal temperature
The volumetric expansion in evaporator of the refrigerant of low pressure, absorbs heat, reaches refrigeration, running of the evaporator in air conditioner
In play vital effect.
But when air conditioner is in hot and humid use environment, evaporator is easy to be corroded, so as to influence to steam
The service life of device is sent out, and then influences the refrigeration of whole refrigeration system, the usage experience of user is reduced.In addition, after corrosion
Evaporator can also cause medium (such as refrigerant) leak, health of human body may be influenceed, more seriously, it is also possible to cause wound
Die accident.In the production process of evaporator, at present often using carrying out anti-corrosion by the way of the anticorrosion with painting paint of evaporator two ends
Processing, but oiliness corrosion resistant coating belongs to organic volatile solvent, there is certain toxicity, and it is flammable explosive, for Workplace
Air permeability and fire-proof and explosion-proof requirement are higher, there is potential safety hazard；Although aqueous anticorrosion paint hygienic environment-protecting, for spray-coating surface
Pre-processing requirements are more strict, generally require using special sand paper polishing or blasting treatment to ensure good tack,
Due to the structure out-of-flatness at evaporator two ends, the process of pretreatment is not easy to operate, causes productive temp slow, has a strong impact on evaporation
The production efficiency of device.
The content of the invention
It is an object of the invention to extend the service life of evaporator.
The present invention one is further objective is that improve the production efficiency of evaporator.
Especially, the invention provides a kind of processing method of evaporator surface, including：Evaporator is put into and is heated to
150 DEG C of debinding furnace is dried, so that the greasy dirt of evaporator surface occurs flash burn and removed；Use 0.4-0.6Mpa nitrogen
Nitrogen flushing is carried out to the evaporator for removing surface and oil contaminant；It it is 15-30 DEG C in temperature, relative humidity is less than 65%, normal atmosphere press strip
Under part, corrosion resistant coating is sprayed into evaporator surface；Evaporator after anticorrosion with painting paint is stood and dodges dry to realize；And will evaporation
Device, which is put into, to be heated to 150 DEG C of debinding furnace and is dried, to utilize the corrosion resistant coating on high temperature drying evaporator surface.
Alternatively, the step of corrosion resistant coating being sprayed into evaporator surface includes：In evaporator surface anticorrosion with painting paint thin layer；
And in the full wet layer of corrosion resistant coating thin layer external spray corrosion resistant coating.
Alternatively, the step of carrying out nitrogen flushing to the evaporator for removing surface and oil contaminant includes：Liquid nitrogen in liquid nitrogen plant is led to
Cross the production wire body that liquid nitrogen pipes are sent to evaporator；And the nitrogen obtained using liquid nitrogen vaporization to evaporator into and out of liquid pipe
The mouth of pipe carry out nitrogen flushing.
Alternatively, the mouth of pipe of the nitrogen pipeline of supplying nitrogen and evaporator is into and out of the distance between mouth of pipe of liquid pipe
5-10 ㎝, and nitrogen is blowed to the mouth of pipe into and out of liquid pipe of evaporator by the mouth of pipe front of nitrogen pipeline.
Alternatively, corrosion resistant coating is aqueous high temperature baking vanish.
Alternatively, the baking duration for making the greasy dirt of evaporator surface occur flash burn and remove is 3 minutes.
Alternatively, it is 20 minutes using the baking duration of the corrosion resistant coating on high temperature drying evaporator surface.
Alternatively, the time of repose of the evaporator after anticorrosion with painting paint is 5-10 minutes.
Alternatively, the step of using the corrosion resistant coating on high temperature drying evaporator surface after also include：By evaporator small
Cooled down at a temperature of 60 DEG C.
Alternatively, the cool and add temperature-sensitive ingredients of evaporator are 5-10 minutes.
The processing method of the evaporator surface of the present invention, the debinding furnace that 150 DEG C are heated to by the way that evaporator is put into is carried out
Drying, so that the greasy dirt of evaporator surface occurs flash burn and removed, reuses 0.4-0.6Mpa nitrogen to removing surface and oil contaminant
Evaporator carry out nitrogen flushing, be then 15-30 DEG C in temperature, relative humidity is less than 65%, under standard atmosphere condition, by anti-corrosion
Paint sprays to evaporator surface, and the evaporator after anticorrosion with painting paint is stood and is heated to realizing that evaporator is put into by sudden strain of a muscle after doing
150 DEG C of debinding furnace is dried, so that using the corrosion resistant coating on high temperature drying evaporator surface, devaporation is removed using the mode of drying
The greasy dirt on device surface, can not only save unworkable washing or blasting craft, can also be using the remaining temperature after drying to steaming
Hair device surface is painted, and is conducive to improving the adhesive force of corrosion resistant coating, is lifted the treatment effect of evaporator surface, effectively prevents from steaming
Hair device is corroded, so as to extend the service life of evaporator.
Further, the processing method of evaporator surface of the invention, wherein corrosion resistant coating is sprayed into evaporator surface
During first in evaporator surface anticorrosion with painting paint thin layer, can be with then in the full wet layer of corrosion resistant coating thin layer external spray corrosion resistant coating
Ensure the tack of corrosion resistant coating, it is to avoid sagging phenomenon occur in evaporator surface after anticorrosion with painting paint, to removing surface and oil contaminant
Evaporator carry out nitrogen flushing and can improve the spatter property of evaporator, and do not influence productive temp, make steaming using the mode of drying
The corrosion resistant coating for sending out device surface spraying is dried, and can effectively shorten the drying time of evaporator, improves the production efficiency of evaporator.
According to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will be brighter
Above-mentioned and other purposes, the advantages and features of the present invention.
Brief description of the drawings
Some specific embodiments of the present invention are described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is the schematic diagram of the processing method of evaporator surface according to an embodiment of the invention；And
Fig. 2 is the detail flowchart of the processing method of evaporator surface according to an embodiment of the invention.
Embodiment
A kind of processing method of evaporator surface is present embodiments provided, evaporator surface is removed by way of drying
Greasy dirt, and evaporator surface is painted using the remaining temperature after drying, be conducive to improving the adhesive force of corrosion resistant coating, lifting evaporation
The treatment effect on device surface, effectively prevents evaporator to be corroded, so as to extend the service life of evaporator.Fig. 1 is according to this hair
The schematic diagram of the processing method of the evaporator surface of bright one embodiment, as illustrated, the processing method bag of the evaporator surface
Include following steps：
Step S102, evaporator is put into and is heated to 150 DEG C of debinding furnace and is dried, so that the greasy dirt of evaporator surface
Generation flash burn and remove；
Step S104, nitrogen flushing is carried out using 0.4-0.6Mpa nitrogen to the evaporator for removing surface and oil contaminant；
Step S106, is 15-30 DEG C in temperature, relative humidity is less than under 65%, standard atmosphere condition, and corrosion resistant coating is sprayed
It is coated onto evaporator surface；
Step S108, the evaporator after anticorrosion with painting paint is stood and dodges dry to realize；
Step S110, evaporator is put into and is heated to 150 DEG C of debinding furnace and is dried, to utilize high temperature drying evaporator
The corrosion resistant coating on surface.
In above step, the greasy dirt of evaporator surface is mainly volatile oil and lubricating oil, main component in step S102
It is oily based on isoparaffin, and be composited by additives such as oiliness improver, antioxidant, surfactants, the sudden strain of a muscle of these greasy dirts
Point temperature is typically no less than 75 DEG C.Flash temperature refers to that under prescribed test conditions the steam that flammable liquid is volatilized exists
After being mixed to form flammable mixtures with air and reach finite concentration, can be flashed when meeting at certain temperature it is on fire most
Low temperature.Experimental condition as defined in above-mentioned meets standard GB/T/T267-1988, i.e. Flash Point for Petroleum Products and determination of ignition point method
(opening agar diffusion method), the national standard is applied to determine lubricating oil and deep color petroleum product.
The operating temperature of debinding furnace is 150 DEG C or so, and the temperature is higher than the flash temperature of volatile oil and lubricating oil, by inciting somebody to action
Evaporator, which is put into, to be heated to 150 DEG C of debinding furnace and is dried, and the greasy dirt of evaporator surface can be made to occur flash burn and remove.Oil
Pollution flashover combustion compared to greasy dirt volatilization, speed faster, the cycle it is shorter, and oily waste degradation is more thorough, and dries removal evaporator
The related moisture of evaporator surface can also be removed while surface and oil contaminant.The processing method of the evaporator surface of the present embodiment without
It need to be washed or the technique such as sandblasting can just remove the greasy dirt of evaporator surface, meet evaporator surface anticorrosion with painting paint
Condition, and natural air drying process is eliminated, shorten the time of whole production process.It should be noted that debinding furnace conduct
Make the plant equipment that the grease of workpiece surface volatilizees and burns and remove using heating means, its model, size, type can roots
Selected according to actual conditions.
The nitrogen pressure used in step S104 is 0.4-0.6Mpa, and the nitrogen of the pressure has preferably clearly to evaporator
Clean effect.Wherein nitrogen can be prepared by liquid nitrogen vaporization, and carry out the evaporator position of nitrogen flushing for evaporator into and out of
Liquid pipe mouthful, is separated by a certain distance between the mouth of pipe of the nitrogen pipeline of supplying nitrogen and the mouth of pipe into and out of liquid pipe of evaporator.One
In kind of preferred embodiment, the mouth of pipe of the nitrogen pipeline of supplying nitrogen and evaporator into and out of the distance between mouth of pipe of liquid pipe
For 5-10 ㎝, and nitrogen is blowed to the mouth of pipe into and out of liquid pipe of evaporator by the mouth of pipe front of nitrogen pipeline.Can be with by nitrogen flushing
The spatter property of evaporator is improved, in addition, Blowing Nitrogen Process is carried out in the production wire body flowing water of evaporator, the life of evaporator is not interfered with
Produce efficiency.
Temperature is 15-30 DEG C in step S106, and relative humidity is less than 65%, and the condition of standard atmospheric pressure is to evaporator
The suitable condition of surface spraying corrosion resistant coating.After drying removes the greasy dirt of evaporator surface in step S102, evaporator surface is still
Have a surplus temperature, the remaining temperature is higher than 15-30 DEG C in step S106 of temperature, thus using the remaining temperature sprayed corrosion resistant coating in step S106
To evaporator surface, the adhesive force of corrosion resistant coating can be improved, it is ensured that the spraying effect of evaporator surface.
Because oiliness corrosion resistant coating belongs to organic volatile solvent, there is certain toxicity, and it is flammable explosive, for Workplace
Air permeability and fire-proof and explosion-proof requirement it is higher, there is potential safety hazard, the corrosion resistant coating of the present embodiment can use aqueous anticorrosion paint,
Aqueous anticorrosion paint hygienic environment-protecting, the processing method of the evaporator surface of the present embodiment can meet aqueous anticorrosion paint for spray-coating surface
Pre-processing requirements, ensure that the good tack of evaporator surface.In a kind of preferred embodiment, corrosion resistant coating can be
Aqueous high temperature baking vanish.In addition, the step of corrosion resistant coating is sprayed into evaporator surface can also include：It is anti-in evaporator surface spraying
Corruption paint thin layer；And in the full wet layer of corrosion resistant coating thin layer external spray corrosion resistant coating, the tack of corrosion resistant coating is may further ensure that, and
It can avoid producing sagging phenomenon after anticorrosion with painting paint.
The evaporator after anticorrosion with painting paint is stood in step S108 and dodges dry process in step S106 identicals to realize
Under the conditions of carry out, i.e., be 15-30 DEG C in temperature, relative humidity is less than 65%, under conditions of standard atmospheric pressure, anticorrosion with painting paint it
Afterwards, just evaporator is stood and dodges dry to realize.
Dry by way of drying the corrosion resistant coating of evaporator surface in step S110, high temperature can accelerate the friendship of paint film
Join speed, just corrosion resistant coating can be made to be solidified into dry film in the short period of time.Relative to traditional corrosion resistant coating that dries
Mode, can effectively shorten the time of technological process, improve the production efficiency of evaporator.
The processing method of the evaporator surface of the present embodiment, the greasy dirt of evaporator surface is removed using the mode of drying, no
Unworkable washing or blasting craft can be only saved, evaporator surface can also be sprayed using the remaining temperature after drying
Paint, is conducive to improving the adhesive force of corrosion resistant coating, lifts the treatment effect of evaporator surface, effectively prevent evaporator to be corroded, from
And extend the service life of evaporator.
In some alternative embodiments, by the further optimization to above-mentioned steps and configuration evaporator can be realized
Higher technique effect, evaporator table of the introduction for optionally performing flow below in conjunction with one to the present embodiment to the present embodiment
The processing method in face is described in detail, the embodiment be only to perform flow for example, in the specific implementation, Ke Yigen
According to specific implementation demand, execution sequence, service condition to part steps are modified.Fig. 2 is according to one implementation of the present invention
The detail flowchart of the processing method of the evaporator surface of example.The processing method of the evaporator surface comprises the following steps：
Step S202, evaporator is put into and is heated to 150 DEG C of debinding furnace and is dried, so that the greasy dirt of evaporator surface
Generation flash burn and remove；
Step S204, the liquid nitrogen in liquid nitrogen plant is sent to by liquid nitrogen pipes the production wire body of evaporator；
Step S206, the nitrogen obtained using liquid nitrogen vaporization carries out nitrogen flushing to the mouth of pipe into and out of liquid pipe of evaporator；
Step S208, is 15-30 DEG C in temperature, relative humidity is less than under 65%, standard atmosphere condition, in evaporator table
Face anticorrosion with painting paint thin layer；
Step S210, in the full wet layer of corrosion resistant coating thin layer external spray corrosion resistant coating；
Step S212, the evaporator after anticorrosion with painting paint is stood and dodges dry to realize；
Step S214, evaporator is put into and is heated to 150 DEG C of debinding furnace and is dried, to utilize high temperature drying evaporator
The corrosion resistant coating on surface；
Step S216, evaporator is cooled down at a temperature of less than 60 DEG C.
In above step, the baking duration for making the greasy dirt of evaporator surface occur flash burn and remove in step S202
For 3 minutes.
Nitrogen is obtained by liquid nitrogen vaporization in step S206, the entering of the mouth of pipe of the nitrogen pipeline of supplying nitrogen and evaporator,
The distance between mouth of pipe of drain pipe be 5-10 ㎝, and nitrogen by the mouth of pipe front of nitrogen pipeline blow to evaporator into and out of
The mouth of pipe of liquid pipe.
The time of repose of evaporator in step S212 after anticorrosion with painting paint is 5-10 minutes.High temperature is utilized in step S214
The baking duration of the corrosion resistant coating on drying evaporator surface is 20 minutes.The cool and add temperature-sensitive ingredients of evaporator are in step S216
5-10 minutes, other follow-up process flows can be carried out after cooling.
The processing method of the evaporator surface of the present embodiment, the greasy dirt of evaporator surface is removed using the mode of drying, no
Unworkable washing or blasting craft can be only saved, evaporator surface can also be sprayed using the remaining temperature after drying
Paint, is conducive to improving the adhesive force of corrosion resistant coating, lifts the treatment effect of evaporator surface, effectively prevent evaporator to be corroded, from
And extend the service life of evaporator.
Further, the processing method of the evaporator surface of the present embodiment, wherein corrosion resistant coating is sprayed into evaporator surface
During first in evaporator surface anticorrosion with painting paint thin layer, can then in the full wet layer of corrosion resistant coating thin layer external spray corrosion resistant coating
To ensure the tack of corrosion resistant coating, it is to avoid sagging phenomenon occur in evaporator surface after anticorrosion with painting paint, to removing surface oil
Dirty evaporator, which carries out nitrogen flushing, can improve the spatter property of evaporator, and not influence productive temp, be made using the mode of drying
The corrosion resistant coating of evaporator surface spraying is dried, and can effectively shorten the drying time of evaporator, improves the production efficiency of evaporator.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, still can be direct according to present disclosure without departing from the spirit and scope of the present invention
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognized
It is set to and covers other all these variations or modifications.
Claims (10)
1. a kind of processing method of evaporator surface, including：
The evaporator is put into and is heated to 150 DEG C of debinding furnace and is dried, so that the greasy dirt of the evaporator surface occurs
Flash burn and remove；
Nitrogen flushing is carried out to the evaporator for removing surface and oil contaminant using 0.4-0.6Mpa nitrogen；
It it is 15-30 DEG C in temperature, relative humidity is less than under 65%, standard atmosphere condition, and corrosion resistant coating is sprayed into the evaporation
Device surface；
The evaporator after anticorrosion with painting paint is stood and dodges dry to realize；And
The evaporator is put into and is heated to 150 DEG C of the debinding furnace and is dried, to dry the evaporator using high temperature
The corrosion resistant coating on surface.
2. the processing method of evaporator surface according to claim 1, wherein corrosion resistant coating is sprayed into the evaporator table
The step of face, includes：
In the evaporator surface anticorrosion with painting paint thin layer；And
In the full wet layer of the corrosion resistant coating thin layer external spray corrosion resistant coating.
3. the processing method of evaporator surface according to claim 1, wherein the evaporator to removing surface and oil contaminant
The step of carrying out nitrogen flushing includes：
Liquid nitrogen in liquid nitrogen plant is sent to the production wire body of the evaporator by liquid nitrogen pipes；And
The nitrogen obtained using the liquid nitrogen vaporization carries out nitrogen flushing to the mouth of pipe into and out of liquid pipe of the evaporator.
4. the processing method of evaporator surface according to claim 3, wherein,
The mouth of pipe of the nitrogen pipeline of supplying nitrogen and the evaporator into and out of the distance between mouth of pipe of liquid pipe be 5-10 ㎝,
And nitrogen is blowed to the mouth of pipe into and out of liquid pipe of the evaporator by the mouth of pipe front of the nitrogen pipeline.
5. the processing method of evaporator surface according to claim 1, wherein,
The corrosion resistant coating is aqueous high temperature baking vanish.
6. the processing method of evaporator surface according to claim 1, wherein,
The baking duration for making the greasy dirt of the evaporator surface occur flash burn and remove is 3 minutes.
7. the processing method of evaporator surface according to claim 1, wherein,
The baking duration that the corrosion resistant coating of the evaporator surface is dried using high temperature is 20 minutes.
8. the processing method of evaporator surface according to claim 1, wherein,
The time of repose of the evaporator after anticorrosion with painting paint is 5-10 minutes.
9. the processing method of evaporator surface according to claim 1, wherein drying the evaporator table using high temperature
Also include after the step of corrosion resistant coating in face：
The evaporator is cooled down at a temperature of less than 60 DEG C.
10. the processing method of evaporator surface according to claim 9, wherein,
The cool and add temperature-sensitive ingredients of the evaporator are 5-10 minutes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710230149.2A CN107138371A (en) | 2017-04-10 | 2017-04-10 | The processing method of evaporator surface |
| PCT/CN2018/082395 WO2018188564A1 (en) | 2017-04-10 | 2018-04-09 | Treatment method for surface of evaporator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710230149.2A CN107138371A (en) | 2017-04-10 | 2017-04-10 | The processing method of evaporator surface |
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| WO2018188564A1 (en) * | 2017-04-10 | 2018-10-18 | 青岛海尔空调器有限总公司 | Treatment method for surface of evaporator |
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| CN104138823A (en) * | 2014-07-29 | 2014-11-12 | 江苏康杰机械股份有限公司 | Aluminum-workpiece pre-spraying device |
| CN107138371A (en) * | 2017-04-10 | 2017-09-08 | 青岛海尔空调器有限总公司 | The processing method of evaporator surface |
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| WO2018188564A1 (en) * | 2017-04-10 | 2018-10-18 | 青岛海尔空调器有限总公司 | Treatment method for surface of evaporator |
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Application publication date: 20170908 |
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| RJ01 | Rejection of invention patent application after publication |