WO2018188564A1 - 蒸发器表面的处理方法 - Google Patents

蒸发器表面的处理方法 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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Prior art keywords
evaporator
anticorrosive paint
drying
nitrogen
spraying
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PCT/CN2018/082395
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English (en)
French (fr)
Inventor
杜超
王小鹏
汤丹
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Publication of WO2018188564A1 publication Critical patent/WO2018188564A1/zh
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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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Abstract

蒸发器表面的处理方法，包括：将蒸发器放入加热至150℃的脱脂炉进行烘干，以使蒸发器表面的油污发生闪燃而去除(S102)；使用0.4-0.6 Mpa的氮气对去除表面油污的蒸发器进行吹氮(S104)；在温度为15-30℃，相对湿度小于65％，标准大气压条件下，将防腐漆喷涂到蒸发器表面(S106)；将喷涂防腐漆后的蒸发器静置以实现闪干(S108)；以及将蒸发器放入加热至150℃的脱脂炉进行烘干，以利用高温烘干蒸发器表面的防腐漆(S110)。该方法省去水洗或喷砂工艺，利用烘干后的余温对蒸发器表面进行喷漆，有利于提高防腐漆的附着力，有效防止蒸发器被腐蚀，延长使用寿命。

Description

蒸发器表面的处理方法 技术领域
本发明涉及制冷技术领域，特别是涉及一种蒸发器表面的处理方法。
背景技术
随着社会日益发展以及人们生活水平不断提高，环境调节电器如空调器等越来越普及，空调器已经成为人们生活中必不可少的家用电器。
在空调器的制冷系统中，冷凝器，蒸发器，压缩机和节流阀是必不可少的四大部件。其中压缩机将制冷剂压缩为高压高温的液体，冷凝器将制冷剂冷却为高压常温的液体，节流阀将制冷剂节流降压为常温低压的液体，蒸发器是制冷系统中输送冷量的设备，常温低压的制冷剂在蒸发器中体积膨胀，吸收热量，达到制冷效果，蒸发器在空调器的运行过程中起着至关重要的作用。
但是当空调器处于高温高湿的使用环境中时，蒸发器很容易被腐蚀，从而影响蒸发器的使用寿命，进而影响整个制冷系统的制冷效果，降低用户的使用体验。此外，腐蚀后的蒸发器还会造成介质(例如制冷剂)泄漏，可能会影响人身健康，更严重地，还可能导致伤亡事故。在蒸发器的生产过程中，目前往往采用在蒸发器两端喷涂防腐漆的方式进行防腐处理，但是油性防腐漆属于有机挥发溶剂，有一定的毒性，并且可燃可爆，对于生产场所的通风性和防火防爆的要求较高，存在安全隐患；水性防腐漆虽然卫生环保，但对于喷涂面的预处理要求较为严格，一般需要使用专门的砂纸打磨或者喷砂处理以保证良好的附着性，由于蒸发器两端的结构不平整，预处理的过程不易操作，导致生产节拍缓慢，严重影响蒸发器的生产效率。
发明内容
本发明的一个目的是延长蒸发器的使用寿命。
本发明一个进一步的目的是提高蒸发器的生产效率。
特别地，本发明提供了一种蒸发器表面的处理方法，包括：将蒸发器放入加热至150℃的脱脂炉进行烘干，以使蒸发器表面的油污发生闪燃而去除；使用0.4-0.6Mpa的氮气对去除表面油污的蒸发器进行吹氮；在温度为 15-30℃，相对湿度小于65％，标准大气压条件下，将防腐漆喷涂到蒸发器表面；将喷涂防腐漆后的蒸发器静置以实现闪干；以及将蒸发器放入加热至150℃的脱脂炉进行烘干，以利用高温烘干蒸发器表面的防腐漆。
可选地，将防腐漆喷涂到蒸发器表面的步骤包括：在蒸发器表面喷涂防腐漆薄层；以及在防腐漆薄层外部喷涂防腐漆全湿层。
可选地，对去除表面油污的蒸发器进行吹氮的步骤包括：将液氮设备中的液氮通过液氮管道送达蒸发器的生产线体；以及利用液氮汽化得到的氮气对蒸发器的进、出液管的管口进行吹氮。
可选地，输送氮气的氮气管路的管口与蒸发器的进、出液管的管口之间的距离为5-10㎝，并且氮气由氮气管路的管口正面吹向蒸发器的进、出液管的管口。
可选地，防腐漆为水性高温烤漆。
可选地，使蒸发器表面的油污发生闪燃而去除的烘干持续时间为3分钟。
可选地，利用高温烘干蒸发器表面的防腐漆的烘干持续时间为20分钟。
可选地，喷涂防腐漆后的蒸发器的静置时间为5-10分钟。
可选地，在利用高温烘干蒸发器表面的防腐漆的步骤之后还包括：将蒸发器在小于60℃的温度下冷却。
可选地，蒸发器的冷却持续时间为5-10分钟。
本发明的蒸发器表面的处理方法，通过将蒸发器放入加热至150℃的脱脂炉进行烘干，以使蒸发器表面的油污发生闪燃而去除，再使用0.4-0.6Mpa的氮气对去除表面油污的蒸发器进行吹氮，然后在温度为15-30℃，相对湿度小于65％，标准大气压条件下，将防腐漆喷涂到蒸发器表面，将喷涂防腐漆后的蒸发器静置以实现闪干之后将蒸发器放入加热至150℃的脱脂炉进行烘干，以利用高温烘干蒸发器表面的防腐漆，利用烘干的方式除去蒸发器表面的油污，不仅可以省去难以操作的水洗或喷砂工艺，还可以利用烘干后的余温对蒸发器表面进行喷漆，有利于提高防腐漆的附着力，提升蒸发器表面的处理效果，有效防止蒸发器被腐蚀，从而延长蒸发器的使用寿命。
进一步地，本发明的蒸发器表面的处理方法，其中将防腐漆喷涂到蒸发器表面的过程中先在蒸发器表面喷涂防腐漆薄层，然后在防腐漆薄层外部喷涂防腐漆全湿层，可以保证防腐漆的附着性，避免喷涂防腐漆之后在蒸发器表面出现流挂现象，对去除表面油污的蒸发器进行吹氮可以提高蒸发器的清 洁性，并且不影响生产节拍，利用烘干的方式使蒸发器表面喷涂的防腐漆干燥，可以有效缩短蒸发器的干燥时间，提高蒸发器的生产效率。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1是根据本发明一个实施例的蒸发器表面的处理方法的示意图；以及
图2是根据本发明一个实施例的蒸发器表面的处理方法的详细流程图。
具体实施方式
本实施例提供了一种蒸发器表面的处理方法，通过烘干的方式除去蒸发器表面的油污，并利用烘干后的余温对蒸发器表面进行喷漆，有利于提高防腐漆的附着力，提升蒸发器表面的处理效果，有效防止蒸发器被腐蚀，从而延长蒸发器的使用寿命。图1是根据本发明一个实施例的蒸发器表面的处理方法的示意图，如图所示，该蒸发器表面的处理方法包括以下步骤：
步骤S102，将蒸发器放入加热至150℃的脱脂炉进行烘干，以使蒸发器表面的油污发生闪燃而去除；
步骤S104，使用0.4-0.6Mpa的氮气对去除表面油污的蒸发器进行吹氮；
步骤S106，在温度为15-30℃，相对湿度小于65％，标准大气压条件下，将防腐漆喷涂到蒸发器表面；
步骤S108，将喷涂防腐漆后的蒸发器静置以实现闪干；
步骤S110，将蒸发器放入加热至150℃的脱脂炉进行烘干，以利用高温烘干蒸发器表面的防腐漆。
在以上步骤中，步骤S102中蒸发器表面的油污主要为挥发油及润滑油，主要成分以异构烷烃为基础油，并由油性剂、抗氧剂、表面活性剂等添加剂复合而成，这些油污的闪点温度一般不小于75℃。闪点温度是指在规定的试验条件下，可燃性液体挥发出的蒸汽在与空气混合形成可燃性混合物并达到一定浓度之后，遇一定的温度下时能够闪烁起火的最低温度。上述规定的试验条件符合国家标准GB/T267-1988，即石油产品闪点与燃点测定法(开口 杯法)，该国家标准适用于测定润滑油和深色石油产品。
脱脂炉的工作温度为150℃左右，该温度高于挥发油及润滑油的闪点温度，通过将蒸发器放入加热至150℃的脱脂炉进行烘干，可以使蒸发器表面的油污发生闪燃而去除。油污闪燃相比油污挥发，速度更快、周期更短，并且油污去除更加彻底，并且烘干去除蒸发器表面油污的同时还可以去除蒸发器表面的相关水分。本实施例的蒸发器表面的处理方法无需进行水洗或者喷砂等工艺就可以去除蒸发器表面的油污，满足蒸发器表面喷涂防腐漆的条件，并且省去了自然风干工序，缩短了整个生产工序的时间。需要说明的是，脱脂炉作为采用加热方法使工件表面的油脂挥发和燃烧而除去的机械设备，其型号、大小、类型可以根据实际情况进行选择。
步骤S104中使用的氮气压强为0.4-0.6Mpa，该压强的氮气对蒸发器具有更好的清洁效果。其中氮气可以通过液氮汽化来制备，并且进行吹氮的蒸发器部位为蒸发器的进、出液管口，输送氮气的氮气管路的管口与蒸发器的进、出液管的管口之间相距一定距离。在一种优选的实施例中，输送氮气的氮气管路的管口与蒸发器的进、出液管的管口之间的距离为5-10㎝，并且氮气由氮气管路的管口正面吹向蒸发器的进、出液管的管口。通过吹氮可以提高蒸发器的清洁性，此外，吹氮过程在蒸发器的生产线体流水进行，不会影响蒸发器的生产效率。
步骤S106中温度为15-30℃，相对湿度小于65％，标准大气压的条件，是对蒸发器表面喷涂防腐漆的适宜条件。步骤S102中烘干去除蒸发器表面的油污之后，蒸发器表面仍有余温，该余温高于步骤S106中15-30℃的温度，因而步骤S106中利用该余温将防腐漆喷涂到蒸发器表面，可以提高防腐漆的附着力，保证蒸发器表面的喷涂效果。
由于油性防腐漆属于有机挥发溶剂，有一定的毒性，并且可燃可爆，对于生产场所的通风性和防火防爆的要求较高，存在安全隐患，本实施例的防腐漆可以采用水性防腐漆，水性防腐漆卫生环保，本实施例的蒸发器表面的处理方法可以满足水性防腐漆对于喷涂面的预处理要求，能够保证蒸发器表面良好的附着性。在一种优选的实施例中，防腐漆可以为水性高温烤漆。此外，将防腐漆喷涂到蒸发器表面的步骤还可以包括：在蒸发器表面喷涂防腐漆薄层；以及在防腐漆薄层外部喷涂防腐漆全湿层，可以进一步保证防腐漆的附着性，并可以避免喷涂防腐漆之后产生流挂现象。
步骤S108中将喷涂防腐漆后的蒸发器静置以实现闪干的过程在步骤S106相同的条件下进行，即在温度为15-30℃，相对湿度小于65％，标准大气压的条件下，喷涂防腐漆之后，就将蒸发器静置以实现闪干。
步骤S110中通过烘干的方式使蒸发器表面的防腐漆干燥，高温可以加快漆膜的交联速度，在较短的时间内就可以使防腐漆固化成干燥的涂膜。相对于传统的晾干防腐漆的方式，可以有效缩短工艺流程的时间，提高了蒸发器的生产效率。
本实施例的蒸发器表面的处理方法，利用烘干的方式除去蒸发器表面的油污，不仅可以省去难以操作的水洗或喷砂工艺，还可以利用烘干后的余温对蒸发器表面进行喷漆，有利于提高防腐漆的附着力，提升蒸发器表面的处理效果，有效防止蒸发器被腐蚀，从而延长蒸发器的使用寿命。
在一些可选实施例中，可以通过对上述步骤的进一步优化和配置使得蒸发器实现更高的技术效果，以下结合对本实施例的一个可选执行流程的介绍对本实施例的蒸发器表面的处理方法进行详细说明，该实施例仅为对执行流程的举例说明，在具体实施时，可以根据具体实施需求，对部分步骤的执行顺序、运行条件进行修改。图2是根据本发明一个实施例的蒸发器表面的处理方法的详细流程图。该蒸发器表面的处理方法包括以下步骤：
步骤S202，将蒸发器放入加热至150℃的脱脂炉进行烘干，以使蒸发器表面的油污发生闪燃而去除；
步骤S204，将液氮设备中的液氮通过液氮管道送达蒸发器的生产线体；
步骤S206，利用液氮汽化得到的氮气对蒸发器的进、出液管的管口进行吹氮；
步骤S208，在温度为15-30℃，相对湿度小于65％，标准大气压条件下，在蒸发器表面喷涂防腐漆薄层；
步骤S210，在防腐漆薄层外部喷涂防腐漆全湿层；
步骤S212，将喷涂防腐漆后的蒸发器静置以实现闪干；
步骤S214，将蒸发器放入加热至150℃的脱脂炉进行烘干，以利用高温烘干蒸发器表面的防腐漆；
步骤S216，将蒸发器在小于60℃的温度下冷却。
在以上步骤中，步骤S202中使蒸发器表面的油污发生闪燃而去除的烘干持续时间为3分钟。
步骤S206中通过液氮汽化得到氮气，输送氮气的氮气管路的管口与蒸发器的进、出液管的管口之间的距离为5-10㎝，并且氮气由氮气管路的管口正面吹向蒸发器的进、出液管的管口。
步骤S212中喷涂防腐漆后的蒸发器的静置时间为5-10分钟。步骤S214中利用高温烘干蒸发器表面的防腐漆的烘干持续时间为20分钟。步骤S216中蒸发器的冷却持续时间为5-10分钟，冷却之后可以进行后续的其他工序流程。
本实施例的蒸发器表面的处理方法，利用烘干的方式除去蒸发器表面的油污，不仅可以省去难以操作的水洗或喷砂工艺，还可以利用烘干后的余温对蒸发器表面进行喷漆，有利于提高防腐漆的附着力，提升蒸发器表面的处理效果，有效防止蒸发器被腐蚀，从而延长蒸发器的使用寿命。
进一步地，本实施例的蒸发器表面的处理方法，其中将防腐漆喷涂到蒸发器表面的过程中先在蒸发器表面喷涂防腐漆薄层，然后在防腐漆薄层外部喷涂防腐漆全湿层，可以保证防腐漆的附着性，避免喷涂防腐漆之后在蒸发器表面出现流挂现象，对去除表面油污的蒸发器进行吹氮可以提高蒸发器的清洁性，并且不影响生产节拍，利用烘干的方式使蒸发器表面喷涂的防腐漆干燥，可以有效缩短蒸发器的干燥时间，提高蒸发器的生产效率。
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。

Claims (10)

  1. 一种蒸发器表面的处理方法，包括：
    将所述蒸发器放入加热至150℃的脱脂炉进行烘干，以使所述蒸发器表面的油污发生闪燃而去除；
    使用0.4-0.6Mpa的氮气对去除表面油污的所述蒸发器进行吹氮；
    在温度为15-30℃，相对湿度小于65％，标准大气压条件下，将防腐漆喷涂到所述蒸发器表面；
    将喷涂防腐漆后的所述蒸发器静置以实现闪干；以及
    将所述蒸发器放入加热至150℃的所述脱脂炉进行烘干，以利用高温烘干所述蒸发器表面的防腐漆。
  2. 根据权利要求1所述的蒸发器表面的处理方法，其中将防腐漆喷涂到所述蒸发器表面的步骤包括：
    在所述蒸发器表面喷涂防腐漆薄层；以及
    在所述防腐漆薄层外部喷涂防腐漆全湿层。
  3. 根据权利要求1所述的蒸发器表面的处理方法，其中对去除表面油污的所述蒸发器进行吹氮的步骤包括：
    将液氮设备中的液氮通过液氮管道送达所述蒸发器的生产线体；以及
    利用所述液氮汽化得到的氮气对所述蒸发器的进、出液管的管口进行吹氮。
  4. 根据权利要求3所述的蒸发器表面的处理方法，其中，
    输送氮气的氮气管路的管口与所述蒸发器的进、出液管的管口之间的距离为5-10㎝，并且氮气由所述氮气管路的管口正面吹向所述蒸发器的进、出液管的管口。
  5. 根据权利要求1所述的蒸发器表面的处理方法，其中，
    所述防腐漆为水性高温烤漆。
  6. 根据权利要求1所述的蒸发器表面的处理方法，其中，
    使所述蒸发器表面的油污发生闪燃而去除的烘干持续时间为3分钟。
  7. 根据权利要求1所述的蒸发器表面的处理方法，其中，
    利用高温烘干所述蒸发器表面的防腐漆的烘干持续时间为20分钟。
  8. 根据权利要求1所述的蒸发器表面的处理方法，其中，
    喷涂防腐漆后的所述蒸发器的静置时间为5-10分钟。
  9. 根据权利要求1所述的蒸发器表面的处理方法，其中在利用高温烘干所述蒸发器表面的防腐漆的步骤之后还包括：
    将所述蒸发器在小于60℃的温度下冷却。
  10. 根据权利要求9所述的蒸发器表面的处理方法，其中，
    所述蒸发器的冷却持续时间为5-10分钟。
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