WO2018188564A1 - Procédé de traitement pour surface d'évaporateur - Google Patents

Procédé de traitement pour surface d'évaporateur Download PDF

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Publication number
WO2018188564A1
WO2018188564A1 PCT/CN2018/082395 CN2018082395W WO2018188564A1 WO 2018188564 A1 WO2018188564 A1 WO 2018188564A1 CN 2018082395 W CN2018082395 W CN 2018082395W WO 2018188564 A1 WO2018188564 A1 WO 2018188564A1
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WO
WIPO (PCT)
Prior art keywords
evaporator
anticorrosive paint
drying
nitrogen
spraying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/082395
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English (en)
Chinese (zh)
Inventor
杜超
王小鹏
汤丹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Publication of WO2018188564A1 publication Critical patent/WO2018188564A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • 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

Definitions

  • the invention relates to the field of refrigeration technology, and in particular to a method for treating an evaporator surface.
  • condensers, evaporators, compressors and throttles are essential components.
  • the compressor compresses the refrigerant into a high-pressure high-temperature liquid
  • the condenser cools the refrigerant to a high-pressure normal temperature liquid
  • the throttle valve depressurizes the refrigerant to a normal-temperature low-pressure liquid
  • the evaporator is a cooling system in the refrigeration system.
  • the equipment, the normal temperature and low pressure refrigerant expands in the evaporator, absorbs heat, and achieves the cooling effect.
  • the evaporator plays a vital role in the operation of the air conditioner.
  • the air conditioner when the air conditioner is in a high-temperature and high-humidity environment, the evaporator is easily corroded, thereby affecting the service life of the evaporator, thereby affecting the cooling effect of the entire refrigeration system and reducing the user experience.
  • corroded evaporators can cause leakage of media (such as refrigerant), which can affect personal health and, more seriously, can lead to casualties.
  • anti-corrosion treatment is often applied by spraying anti-corrosive paint on both ends of the evaporator, but the oil-based anti-corrosive paint is an organic volatile solvent, has certain toxicity, and is flammable and explosive, and is ventilated for the production place.
  • the requirements for fireproof and explosion-proof are high, and there are safety hazards; although the water-based anti-corrosive paint is hygienic and environmentally friendly, the pretreatment requirements for the sprayed surface are strict, and it is generally required to use special sandpaper sanding or sandblasting to ensure good adhesion due to evaporation.
  • the structure at both ends of the device is not flat, and the pretreatment process is not easy to operate, resulting in slow production tact, which seriously affects the production efficiency of the evaporator.
  • a further object of the invention is to increase the production efficiency of the evaporator.
  • the present invention provides a method for treating the surface of an evaporator, comprising: placing the evaporator in a degreasing furnace heated to 150 ° C for drying to remove the oil on the surface of the evaporator by flashing; 0.6Mpa of nitrogen is used to blow nitrogen to the evaporator that removes surface oil; at a temperature of 15-30 ° C, relative humidity of less than 65%, under standard atmospheric conditions, the anti-corrosive paint is sprayed onto the surface of the evaporator; evaporation after spraying the anti-corrosive paint The device is allowed to stand to achieve flash drying; and the evaporator is placed in a degreasing furnace heated to 150 ° C for drying to dry the anticorrosive paint on the surface of the evaporator with high temperature.
  • the step of spraying the anticorrosive paint onto the surface of the evaporator comprises: spraying a thin layer of anticorrosive paint on the surface of the evaporator; and spraying the entire wet layer of the anticorrosive paint on the outside of the thin layer of the anticorrosive paint.
  • the step of blowing nitrogen to the surface oil-removing evaporator comprises: supplying liquid nitrogen in the liquid nitrogen device to the production line body of the evaporator through the liquid nitrogen pipeline; and using the nitrogen gas vaporized by the liquid nitrogen to the evaporator The nozzles of the inlet and outlet pipes are blown with nitrogen.
  • the distance between the nozzle of the nitrogen gas line conveying the nitrogen gas and the nozzle of the inlet and outlet pipes of the evaporator is 5-10 cm, and the nitrogen gas is blown to the evaporator by the front side of the nozzle of the nitrogen gas line.
  • the nozzle of the inlet and outlet pipes is 5-10 cm, and the nitrogen gas is blown to the evaporator by the front side of the nozzle of the nitrogen gas line.
  • the anticorrosive paint is an aqueous high temperature paint.
  • the drying of the oil on the surface of the evaporator is flashed and the drying duration is 3 minutes.
  • the drying duration of the anticorrosive paint using the high temperature drying evaporator surface is 20 minutes.
  • the evaporator after spraying the anticorrosive paint has a standing time of 5-10 minutes.
  • the method further comprises: cooling the evaporator at a temperature of less than 60 °C.
  • the evaporator has a cooling duration of 5-10 minutes.
  • the method for treating the surface of the evaporator of the present invention is carried out by placing the evaporator in a degreasing furnace heated to 150 ° C to remove the oil stain on the surface of the evaporator, and then removing it by using a nitrogen gas of 0.4-0.6 MPa.
  • the surface oily evaporator is blown with nitrogen, and then the anticorrosive paint is sprayed onto the surface of the evaporator at a temperature of 15-30 ° C and a relative humidity of less than 65% under standard atmospheric pressure, and the evaporator after spraying the anticorrosive paint is allowed to stand.
  • the evaporator After flashing, the evaporator is placed in a degreasing furnace heated to 150 ° C for drying to dry the anticorrosive paint on the surface of the evaporator with high temperature, and the oil on the surface of the evaporator is removed by drying, which can not only save the operation difficult. Washing or sandblasting process, the surface of the evaporator can be painted with the residual temperature after drying, which is beneficial to improve the adhesion of the anticorrosive paint, improve the treatment effect on the surface of the evaporator, effectively prevent the evaporator from being corroded, and thus extend the evaporator. The service life.
  • a thin layer of anticorrosive paint is sprayed on the surface of the evaporator, and then the entire wet layer of the anticorrosive paint is sprayed on the outside of the thin layer of the anticorrosive paint.
  • the method makes the anti-corrosion paint sprayed on the surface of the evaporator dry, which can effectively shorten the drying time of the evaporator and improve the production efficiency of the evaporator.
  • FIG. 1 is a schematic view of a method of treating an evaporator surface according to an embodiment of the present invention
  • FIG. 2 is a detailed flow chart of a method of processing an evaporator surface in accordance with one embodiment of the present invention.
  • the embodiment provides a method for treating the surface of the evaporator, and the oil stain on the surface of the evaporator is removed by drying, and the surface of the evaporator is sprayed by using the residual temperature after drying, which is beneficial to improving the adhesion of the anticorrosive paint. Improve the treatment effect of the evaporator surface, effectively prevent the evaporator from being corroded, thus extending the life of the evaporator.
  • Figure 1 is a schematic illustration of a method of treating an evaporator surface in accordance with one embodiment of the present invention. As shown, the method of treating the surface of the evaporator includes the following steps:
  • Step S102 the evaporator is placed in a degreasing furnace heated to 150 ° C for drying, so that the oil stain on the surface of the evaporator is flashed and removed;
  • Step S104 blowing nitrogen to the evaporator for removing surface oil by using nitrogen gas of 0.4-0.6 MPa;
  • Step S106 spraying the anticorrosive paint onto the surface of the evaporator under the condition of a temperature of 15-30 ° C, a relative humidity of less than 65%, and a standard atmospheric pressure;
  • Step S108 the evaporator after spraying the anticorrosive paint is allowed to stand to achieve flash drying
  • step S110 the evaporator is placed in a degreasing furnace heated to 150 ° C for drying to dry the anticorrosive paint on the surface of the evaporator with high temperature.
  • the oil stain on the surface of the evaporator in step S102 is mainly volatile oil and lubricating oil, and the main component is composed of isoparaffin as a base oil, and is composed of an oily agent, an antioxidant, a surfactant and the like, and these oil stains are formed.
  • the flash point temperature is generally not less than 75 °C.
  • the flash point temperature is the lowest temperature at which a vapor of a flammable liquid volatilizes under a specified test condition to form a flammable mixture with air and reaches a certain concentration, and can ignite at a certain temperature.
  • the test conditions specified above comply with the national standard GB/T267-1988, which is the flash point and ignition point method for petroleum products (open cup method). This national standard is applicable to the determination of lubricating oil and dark petroleum products.
  • the working temperature of the degreasing furnace is about 150 °C, which is higher than the flash point temperature of the volatile oil and the lubricating oil.
  • the treatment method of the evaporator surface of the embodiment can remove the oil stain on the surface of the evaporator without performing the processes such as water washing or sand blasting, meet the conditions for spraying the anticorrosive paint on the surface of the evaporator, and eliminate the natural air drying process, thereby shortening the entire production process. time.
  • the degreasing furnace is a mechanical device that is removed by volatilization and combustion of the grease on the surface of the workpiece by a heating method, and the type, size, and type thereof can be selected according to actual conditions.
  • the nitrogen pressure used in step S104 is 0.4-0.6 MPa, and the pressure nitrogen has a better cleaning effect on the evaporator.
  • Nitrogen can be prepared by vaporization of liquid nitrogen, and the evaporator part for nitrogen blowing is the inlet and outlet of the evaporator, the nozzle of the nitrogen pipeline for conveying nitrogen and the nozzle of the inlet and outlet of the evaporator. A certain distance between them. In a preferred embodiment, the distance between the nozzle of the nitrogen gas line conveying the nitrogen gas and the nozzle of the inlet and outlet tubes of the evaporator is 5-10 cm, and the nitrogen gas is positively connected to the nozzle of the nitrogen gas line. The nozzle of the inlet and outlet pipes that are blown to the evaporator. The cleanliness of the evaporator can be improved by blowing nitrogen. In addition, the nitrogen blowing process is carried out in the production line of the evaporator without affecting the production efficiency of the evaporator.
  • step S106 the temperature is 15-30 ° C, the relative humidity is less than 65%, and the standard atmospheric pressure condition is a suitable condition for spraying the anticorrosive paint on the surface of the evaporator.
  • the standard atmospheric pressure condition is a suitable condition for spraying the anticorrosive paint on the surface of the evaporator.
  • the anticorrosive paint of this embodiment can be made of waterborne anticorrosive paint.
  • the anticorrosive paint is hygienic and environmentally friendly.
  • the treatment method of the evaporator surface of the embodiment can meet the pretreatment requirements of the waterborne anticorrosive paint for the sprayed surface, and can ensure good adhesion of the evaporator surface.
  • the anticorrosive paint can be an aqueous high temperature paint.
  • the step of spraying the anticorrosive paint onto the surface of the evaporator may further comprise: spraying a thin layer of anticorrosive paint on the surface of the evaporator; and spraying the anti-corrosive paint full wet layer on the outside of the thin layer of the anticorrosive paint to further ensure the adhesion of the anticorrosive paint, and It can avoid sag after spraying anti-corrosive paint.
  • step S108 The process of restoring the evaporator after spraying the anticorrosive paint to achieve flash drying in step S108 is performed under the same conditions as in step S106, that is, under the condition of a temperature of 15-30 ° C, a relative humidity of less than 65%, and a standard atmospheric pressure. After the anticorrosive paint, the evaporator is allowed to stand to achieve flash drying.
  • step S110 the anticorrosive paint on the surface of the evaporator is dried by means of drying, and the high temperature can accelerate the crosslinking speed of the paint film, and the anticorrosive paint can be cured into a dry coating film in a short time. Compared with the traditional way of drying anti-corrosive paint, it can effectively shorten the process time and improve the production efficiency of the evaporator.
  • the method for treating the surface of the evaporator of the present embodiment removes the oil stain on the surface of the evaporator by drying, thereby not only eliminating the water washing or sand blasting process which is difficult to operate, but also utilizing the residual temperature after drying to perform the surface of the evaporator.
  • Spraying paint helps to improve the adhesion of the anti-corrosive paint, improve the treatment effect on the surface of the evaporator, effectively prevent the evaporator from being corroded, and thus prolong the service life of the evaporator.
  • the evaporator can achieve a higher technical effect by further optimizing and configuring the above steps.
  • the following describes the treatment of the evaporator surface of the present embodiment in combination with an optional execution flow of the present embodiment. The method is described in detail. This embodiment is only an example of the execution process. In the specific implementation, the execution sequence and operating conditions of some steps may be modified according to specific implementation requirements.
  • 2 is a detailed flow chart of a method of processing an evaporator surface in accordance with one embodiment of the present invention. The method of treating the surface of the evaporator includes the following steps:
  • Step S202 the evaporator is placed in a degreasing furnace heated to 150 ° C for drying, so that the oil stain on the surface of the evaporator is flashed and removed;
  • Step S204 the liquid nitrogen in the liquid nitrogen device is sent to the production line of the evaporator through the liquid nitrogen pipeline;
  • Step S206 nitrogen gas obtained by vaporization of liquid nitrogen is blown to the nozzle of the inlet and outlet pipes of the evaporator;
  • Step S208 spraying a thin layer of anticorrosive paint on the surface of the evaporator under the condition of a temperature of 15-30 ° C, a relative humidity of less than 65%, and a standard atmospheric pressure;
  • Step S210 spraying an anti-corrosive paint full wet layer on the outside of the thin layer of the anticorrosive paint
  • Step S212 the evaporator after spraying the anticorrosive paint is allowed to stand to achieve flash drying
  • Step S214 the evaporator is placed in a degreasing furnace heated to 150 ° C for drying to dry the anticorrosive paint on the surface of the evaporator with high temperature;
  • step S216 the evaporator is cooled at a temperature of less than 60 °C.
  • step S202 the drying duration of the oil stain on the evaporator surface is flashed and removed in step S202 for 3 minutes.
  • step S206 nitrogen gas is obtained by vaporization of liquid nitrogen, and the distance between the nozzle of the nitrogen gas pipeline for supplying nitrogen gas and the nozzle of the inlet and outlet of the evaporator is 5-10 cm, and the nitrogen gas is used for the nozzle of the nitrogen gas pipeline.
  • the front side is blown to the nozzle of the inlet and outlet pipes of the evaporator.
  • the evaporation time of the evaporator after spraying the anticorrosive paint in step S212 is 5-10 minutes.
  • the drying duration of the anticorrosive paint using the high temperature drying evaporator surface in step S214 is 20 minutes.
  • the cooling duration of the evaporator in step S216 is 5-10 minutes, and after the cooling, the subsequent other process flow can be performed.
  • the method for treating the surface of the evaporator of the present embodiment removes the oil stain on the surface of the evaporator by drying, thereby not only eliminating the water washing or sand blasting process which is difficult to operate, but also utilizing the residual temperature after drying to perform the surface of the evaporator.
  • Spraying paint helps to improve the adhesion of the anti-corrosive paint, improve the treatment effect on the surface of the evaporator, effectively prevent the evaporator from being corroded, and thus prolong the service life of the evaporator.
  • a thin layer of anticorrosive paint is sprayed on the surface of the evaporator, and then the entire wet layer of the anticorrosive paint is sprayed on the outside of the thin layer of the anticorrosive paint. It can ensure the adhesion of the anti-corrosive paint, avoid the sag phenomenon on the surface of the evaporator after spraying the anti-corrosive paint, and the nitrogen blowing of the evaporator for removing the surface oil can improve the cleanliness of the evaporator, and does not affect the production cycle, and uses the drying.
  • the method of drying the anti-corrosive paint sprayed on the surface of the evaporator can effectively shorten the drying time of the evaporator and improve the production efficiency of the evaporator.

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  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé de traitement pour la surface d'un évaporateur, comprenant : le placement d'un évaporateur dans un four de dégraissage chauffé à 150 °C pour le séchage, permettant ainsi à une tache d'huile sur la surface de l'évaporateur de subir un allumage instantané pour l'élimination (S102) ; l'utilisation d'azote gazeux à 0,4-0,6 MPa pour le soufflage d'azote sur l'évaporateur ayant la tache d'huile retirée de la surface (S104) ; dans l'état d'une température de 15 à 30 °C, d'une humidité relative inférieure à 65 % et d'une pression atmosphérique standard, l'application d'un revêtement par pulvérisation d'une peinture anticorrosion sur la surface de l'évaporateur (S106) ; le maintien de l'évaporateur revêtu par pulvérisation de la peinture anticorrosion stable à l'arrêt pour mettre en place un séchage instantané (S108) ; et le placement de l'évaporateur dans le four de dégraissage chauffé à 150 °C pour sécher, en utilisant ainsi la température élevée pour sécher la peinture anticorrosion sur la surface de l'évaporateur (S110). Le procédé évite un processus de lavage ou de sablage, utilise la chaleur résiduelle après séchage pour le revêtement par pulvérisation de la surface de l'évaporateur, favorise une augmentation de l'adhérence de la peinture anticorrosion, empêche efficacement l'évaporateur d'être corrodé et prolonge sa durée de vie.
PCT/CN2018/082395 2017-04-10 2018-04-09 Procédé de traitement pour surface d'évaporateur Ceased WO2018188564A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710230149.2A CN107138371A (zh) 2017-04-10 2017-04-10 蒸发器表面的处理方法
CN201710230149.2 2017-04-10

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WO2018188564A1 true WO2018188564A1 (fr) 2018-10-18

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WO (1) WO2018188564A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107138371A (zh) * 2017-04-10 2017-09-08 青岛海尔空调器有限总公司 蒸发器表面的处理方法

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH0665524A (ja) * 1992-08-18 1994-03-08 Sky Alum Co Ltd 熱交換器用アルミニウムフィン用材
CN101169215A (zh) * 2006-10-25 2008-04-30 白日忠 纳米涂层防护管及其涂敷制造工艺
CN102430509A (zh) * 2011-11-17 2012-05-02 中国电器科学研究院有限公司 一种将水性涂料应用于中央空调关键部件的涂装工艺
CN104138823A (zh) * 2014-07-29 2014-11-12 江苏康杰机械股份有限公司 铝制工件预喷涂装置
CN105849499A (zh) * 2013-11-20 2016-08-10 法雷奥热系统公司 热交换器涂层
CN107138371A (zh) * 2017-04-10 2017-09-08 青岛海尔空调器有限总公司 蒸发器表面的处理方法

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Publication number Priority date Publication date Assignee Title
CN103084316B (zh) * 2011-10-31 2015-08-19 郑州科林车用空调有限公司 一种车用空调冷凝器的制造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0665524A (ja) * 1992-08-18 1994-03-08 Sky Alum Co Ltd 熱交換器用アルミニウムフィン用材
CN101169215A (zh) * 2006-10-25 2008-04-30 白日忠 纳米涂层防护管及其涂敷制造工艺
CN102430509A (zh) * 2011-11-17 2012-05-02 中国电器科学研究院有限公司 一种将水性涂料应用于中央空调关键部件的涂装工艺
CN105849499A (zh) * 2013-11-20 2016-08-10 法雷奥热系统公司 热交换器涂层
CN104138823A (zh) * 2014-07-29 2014-11-12 江苏康杰机械股份有限公司 铝制工件预喷涂装置
CN107138371A (zh) * 2017-04-10 2017-09-08 青岛海尔空调器有限总公司 蒸发器表面的处理方法

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