Regulations of disassembled clean and maintenance for room air-conditioner
Some standard content:
ICS03.080.08
Registration number: 27074—2010
People's Republic of China domestic trade industry standard SB/T10543-—2009
Regulations of disassembled clean and maintenance for room air-conditioner2009-12-25 Issued
Ministry of Commerce of the People's Republic of China
2010-07-01 Implementation
SB/T10543—2009
Normative reference documents
3 Terms and definitions
4 Requirements for disassembly, cleaning and maintenance
Disassembly and cleaning methods and procedures
Inspection and testing
This standard is proposed by the China General Chamber of Commerce. This standard is under the jurisdiction of the Ministry of Commerce of the People's Republic of China. Foreword
SB/T10543-2009
This standard was drafted by China Household Electrical Appliances Maintenance Association and Guangdong Midea Refrigeration Equipment Co., Ltd., and Beijing University of Technology, Beijing Electrical Engineering School, Guangdong Chigo Air Conditioning Co., Ltd., and Hisense Kelon Electric Co., Ltd. participated in the drafting. The main drafters of this standard are: Guo Chibing, Liu Song, Zhao Jie, Jin Jiang, Li Hongqi, Song Youshan, Ji Qun, and Wang Yunwei. 1 Scope
Specification for disassembly, cleaning, and maintenance of room air conditioners SB/T10543-2009
This standard specifies the content, methods, steps, effects, and inspection activities related to the disassembly, cleaning, inspection of the use status, and main performance testing of room air conditioners (hereinafter referred to as air conditioners) for household and similar purposes at the place of use. This standard is applicable to air conditioners that use air-cooled condensers, fully enclosed compressor-motor, and air conditioning in enclosed spaces or speed-controlled air conditioners of the same purpose and one (outdoor unit) to multiple (indoor units) type. 2 Normative references
The clauses in the following documents become the clauses of this standard through the reference of this standard. For all referenced documents with dates, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all referenced documents without dates, the latest versions are applicable to this standard. GB/T700 Carbon structural steel
GB/T3787 Safety technical regulations for the management, use, inspection and maintenance of hand-held power tools GB4706.1 Safety of household and similar electrical appliances Part 1: General requirements (GB4706.1-2005, IEC60335-1:2004 (Ed4.1), IDT)
GB/T7725 Room air conditioners (GB/T7725-2004, ISO5151:1994, NEQ) GB8877 Safety requirements for installation, use and maintenance of household and similar electrical appliances GB12021.3-2004 Energy efficiency limit values and energy-saving efficiency grades of room air conditioners GB17790 Installation specification for household and similar air conditioners GB/T21097.1-2007 General rules for safe service life and recycling of household and similar electrical appliances 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
Disassembled clean
For air conditioners that have been used for 3 years or more (or when they are moved or repaired), in order to restore their original performance, professionals shall disassemble the heat exchanger (evaporator, condenser) and ventilation and mechanical rotation systems at the site of use for professional cleaning, lubrication and adjustment.
Level of disassembled
The degree of disassembly of the air conditioner during cleaning and the difficulty of the operation. It is divided into two levels: exposing the heat exchanger in situ after the external parts are disassembled and disassembling the heat exchanger (to the indoor operation position) by disconnecting the refrigeration sealing system. The operation process of disassembling the heat exchanger is complex and difficult. 3.3
Safe service life
After a certain period of time, the safety performance of household appliances in accordance with the requirements of the instruction manual still meets GB4706.1 and its corresponding special requirements.
The safe service life starts from the date of purchase by the consumer. [GB/T21097.1—2007, definition 3.2]
SB/T10543—2009
Rated energy efficiency grade rateenergyefficiencygrade The energy efficiency grade of the air conditioner indicated by the manufacturer in accordance with the standard when the air conditioner leaves the factory. [GB12021.3—2004, definition 3.4]
4 Requirements for disassembly, cleaning and maintenance
4.1 Effect
After disassembly, cleaning and maintenance, there is no dirt and attachments on the surface of the heat exchanger that affect the heat exchange efficiency; the ventilation system is normal and in a low wind resistance state; the safe use period and service life are extended accordingly. 4.2 Content
4.2.1 Clean the outer (front) part of the heat exchanger fins inside the indoor and outdoor units, the rotating parts, connection parts, channels, and air filter parts of the air supply system. 4.2.2 Check the common working conditions and main performance status, and perform corresponding maintenance. 4.2.3 Discover, remind, and eliminate safety hazards as needed. 4.3 Operation
4.3.1 Ensure operation safety
Turn off the power switch of the room air conditioner, unplug the power plug, and ensure operation safety. Wear and use necessary protective equipment and supplies, use equipment and facilities correctly, and use tools in accordance with GB/T3787. Disassembly and maintenance operations should comply with the relevant provisions of GB8877. 4.3.2 Ensure product integrity
Neutral or weak alkaline cleaning agents should be used for cleaning operations, and cleaning tools and cleaning methods should not cause permanent damage such as corrosion, inefficiency, and failure to the cleaning object.
Maintenance operations should use the material models and quantities specified by the air conditioner manufacturer. 4.3.3 Confirm that the installation and use of the product meet the specified requirements and check and confirm the power supply.
Check and confirm that the indoor unit, outdoor unit, and installation parts can operate or be used normally. 4.4 Other requirements
4.4.1 Ensure that the user's items are intact and clean
Put out cleaning protection equipment that matches the cleaning method, install waste containers or collection devices, etc., and protect the parts and items near the operation site to be intact and clean during the disassembly, washing and installation process. 4.4.2 Protect the cleanliness of the user's room
When cleaning, the doors and windows should be opened to keep the cleaning site ventilated to prevent dust, waste and odor pollution. Use dirt protection, collection and collection devices to ensure the cleanliness of the user's room. 4.4.3 Protect the environment
Appropriate measures should be taken to prevent the scattering (falling) of waste items and reduce the adverse effects on surrounding residences and public facilities, equipment and venues.
Use non-polluting and lightly polluting cleaning supplies, tools and operating methods; reduce and reduce pollution emissions. 4.4.4 Save resourceswww.bzxz.net
Save water, electricity resources and cleaning consumables. 4.4.5 Improving efficiency
Disassembly and cleaning can be combined with regular maintenance (before use in summer, during the safe use period), fault repair and other operations. The disassembly and cleaning of the heat exchanger should be carried out together with the time before installation (or after disassembly), fault repair or overhaul when the machine is moved. 5 Disassembly and cleaning methods and procedures
Depending on the material, location, degree of dirtiness, etc. of the cleaning object, use suction (dust blowing, brushing, water flushing or a combination of these methods, and use appropriate cleaning agents when necessary.
SB/T10543—2009
When moving, maintaining, or repairing a fault, the heat exchanger can be disassembled and carefully cleaned according to specific needs, provided that the refrigerant is recovered.
Without disconnecting the closed circulation system of the refrigerant (to ensure that there is no leakage of the refrigerant) and without disassembling the precision electromechanical components and parts, the in-situ cleaning of the heat exchanger after disassembly should be carried out in accordance with the following steps. Cleaning is performed. 5.1 Inspection of usage status before disassembly and cleaning
5.1.1 Basic information of the product
Check the product information to determine the product model, production date, installation record, service life, warranty (maintenance) record, etc. 5.1.2 Product usage status
Before cleaning, turn on the machine to observe the main performance and working conditions, and make records. 5.1.3 Main performance data
If you need to compare the effects before and after cleaning, test and record the main performance parameters (such as: operating voltage, current, power consumption, system pressure, outlet temperature, wind speed, temperature drop (rise) curve, etc.) before cleaning. 5.2 Disassembly, cleaning and maintenance of split wall-mounted indoor unit 5.2.1 Preparation for cleaning
According to the disassembly and assembly procedures, remove the housing, air freshener components, filter screen, louver, air outlet frame assembly, water tray and crossflow impeller to expose the evaporator assembly (see Figure 1 for the exploded view of the relevant parts of the wall-mounted machine). During this period, lay out protective equipment according to the cleaning method and carry out the following cleaning. Chassis
Evaporator assembly
Crossflow impeller
Air outlet frame assembly
Filter screen
Air freshener components
5.2.2 Filter screen
Figure 1 Exploded view of the relevant parts of the wall-mounted machine
Rinse with clean water in a water container first, then brush lightly with a soft brush. If there is oil on the surface or strong attachments, use a neutral detergent to scrub it, rinse with clean water, and take it out to dry. 5.2.3 Components of the housing, shutters and air outlet frame
Wipe with degreased gauze or non-woven fabric in a water container. Use a neutral detergent to scrub the surface oil until the surface is smooth, then remove and wipe dry. 5.2.4 Components of the evaporator
Choose an appropriate cleaning method according to the degree of dirt, assemble the corresponding protective equipment, and clean the outer (front) part of the fin in situ until the metallic luster of the fin is visible.
When the fins are free of dirt and firm adhesion, they can be cleaned with a special vacuum cleaner or air blower with a brush; when the fins are slightly dirty and have firm adhesion, they can be cleaned with a hand pressure water spray device and a brush and blown dry; when the fins are heavily dirty, oxidized, and firmly adhered, they can first be sprayed with an appropriate amount of special air conditioner cleaning agent (which should meet the requirements of relevant national laws and relevant 3
SB/T10543-2009
standards) to soak, then clean with a hand pressure water spray device and a brush, rinse with clean water until there is no residue, and blow dry. 5.2.5 Wash the water tray with clean water in a water container, take it out and wipe it dry. 5.2.6 Crossflow impeller
Brush it with clean water in a water container until there is no dirt. When there is a lot of dirt, oxides or oil stains, add an appropriate amount of special cleaning agent to clean it, rinse with clean water, take it out and wipe it.
5.2.7 Indoor unit back panel
Wipe in situ. When there is a lot of dust or dirt, clean it with a neutral detergent. 5.2.8 Indoor unit mask and middle frame
Wipe with absorbent gauze or non-woven fabric dipped in water. When there is a lot of dust or oil, wipe it with a neutral detergent and wipe it with clean water until it is smooth. 5.2.9 Reinstallation
Assemble and debug according to the disassembly and assembly procedures (after the drainage pipeline is reinstalled, perform drainage inspection. Pour clean water into the indoor unit sink to check whether the drainage is unobstructed).
Add lubricant to the rotating parts as needed, put away the protective equipment, and restore the cleaning site to a clean state. 5.3 Disassembly, cleaning and maintenance of split vertical cabinet indoor unit 5.3.1 Preparation for cleaning
According to the disassembly and assembly procedures, remove the panel, top cover, side panels, air filter, air inlet grille, air outlet frame assembly, centrifugal fan wheel, and expose the evaporator and water tray (the exploded diagram of the cabinet related parts is shown in Figure 2). During this period, lay out protective equipment according to the cleaning method. Box
Evaporator parts
Longitudinal wind plate
Horizontal wind plate
Wind hood
Drain hose
Right centrifugal fan
Left centrifugal fan
Lower panel
Water tray
Air guide cavity
Air duct bracket parts
Air filter
Figure 2 Exploded view of cabinet parts
5.3.2 Air inlet grille
Wipe with degreased gauze or non-woven fabric dipped in water. Use neutral detergent to brush the surface oil until the surface is smooth. 5.3.3 Filter
Rinse with clean water in a water container first, then brush lightly with a soft brush. When there is oil or strong attachments on the surface, use neutral detergent to brush, rinse with clean water, and take out to dry. 5.3.4 Wipe the panel, top cover, side panel, and air outlet frame assembly with absorbent gauze or non-woven fabric dipped in water. When there is oil on the surface, wipe it with a neutral detergent until the surface is clean, and wipe it with clean water for 4
clean.
5.3.5 Evaporator assembly
SB/T10543--2009
Choose an appropriate cleaning method according to the degree of dirt, assemble the corresponding protective equipment, and clean the outer (front) part of the fins in the working position of the evaporator until the fins are shiny.
When there is no dirt or adhesion around the fins, you can use a special vacuum cleaner or air blower with a brush to clean them; when there is slight dirt and strong adhesion on the fins, you can use a hand-pressure water spray device with a brush to remove dust and brush, and blow dry; when there is heavy dirt, oxides, and strong adhesion on the fins, first spray and soak with an appropriate amount of air conditioner special cleaning agent (which should meet the requirements of relevant national laws and standards), then use a hand-pressure water spray device with a brush to brush, rinse with clean water until there is no residue, and blow dry. 5.3.6 Centrifugal impeller
Brush with clean water in a water container with a brush until there is no dirt. When there is a lot of dirt, oxides or oil, add an appropriate amount of special cleaning agent to brush, rinse with clean water, take out and wipe dry.
5.3.7 Side panels, back panels, and top cover panels
Wipe with degreased gauze or non-woven fabric. When there is a lot of dust or oil, scrub it with a neutral detergent and wipe it with clean water until it is bright and clean. 5.3.8 Reinstallation and restoration
Assemble and debug according to the disassembly and assembly procedures (after the drainage pipeline is reinstalled, perform drainage inspection. Pour clean water into the indoor unit sink to check whether the drainage is unobstructed).
Add lubricant to the rotating parts as needed, put away the protective equipment, and restore the cleaning site to a clean state. 5.4 Disassembly, cleaning and maintenance of split outdoor units
5.4.1 Preparation for cleaning
It is necessary to confirm that the safety protection measures for high-altitude workers are effective. According to the disassembly and assembly procedures, remove the panel, top plate, and side plate respectively to expose the heat exchanger (see Figure 3 for the exploded diagram of the relevant parts of the outdoor unit), and lay out the protective equipment as required by the cleaning method. Or confirm that there is no adverse impact on the surrounding and public facilities, equipment, and venues. Top panel
Outdoor fan motor
Motor bracket
Outdoor heat exchanger,
Front panel
Compressor
Separator
Cooler
Directional valve
Image expansion
Rear panel
Inspection panel
Stop valve
(Flying body) Stop valve (gas)
Figure 3 Exploded view of relevant parts of outdoor unit
5.4.2 Top cover
Wipe in a water container. When there is a lot of dust or dirt, clean it with a neutral detergent until the surface is smooth and clean, remove it and wipe it dry. 5.4.3 Fan impeller
Rinse it with clean water in a water container. When there is dirt, scrub it with a neutral detergent, rinse it with clean water, remove it and wipe it dry. 5
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5.4.4 Heat exchanger
Choose appropriate cleaning method according to the degree of dirt, assemble corresponding protective equipment, or confirm that there is no adverse effect on the bottom, and clean the outer (front) part of the fin in situ until the metallic luster of the fin is seen. When there is no dirt and firm adhesion on the fin, it can be cleaned with a special vacuum cleaner or air blower with a brush; when there is heavy dirt, oxide, and sediment attachment on the fin, first spray and soak it with an appropriate amount of special air conditioner cleaning agent (which should meet the requirements of relevant national laws and relevant standards), then use a hand-pressure water spray device with a brush to brush, rinse with clean water until there is no residue, and dry it. 5.4.5 Reinstallation
Assemble and debug according to the disassembly and assembly procedures.
Add lubricant to the rotating parts as needed, put away the protective equipment, and keep the cleaning site clean. 6 Inspection and testing
6.1 Inspection
6.1.1 Safety status
6.1.1.1 Power supply wiring, etc.
Inspect the configuration, polarity, power capacity, wiring and wear of the dedicated power supply wiring, electrical switches and plugs and sockets; inspect the power limit protection device, power leakage protection device, and grounding connection. See Table 1 for the comparison table of copper wire cross-sectional area (wire diameter) and load current.
Table 1 Comparison table of copper wire cross-sectional area (wire diameter) and load current Maximum current passing through the line
X Safety factor/A
Connecting soft wire
Nominal cross-sectional area/mm2
Cables used for power wiring lines
0.75 and 1.0
1.0 and 1.5
1.5 and 2.0
2.0 and 2.5
2.5 and 4.0
4.0 and 6.0
10 and 16
Application examples
(without electric auxiliary heating function)
Signal line and 1200W machine
2000W machine
Single-phase 3500W machine
Single-phase 4500W machine
Single-phase 6800W machine
Single-phase 11500W machine
Single-phase 16000W machine
Single-phase 22500W machine
Note: Safety requirements: Room air conditioners must be powered by a dedicated power branch line, and the wire diameter of the auxiliary wiring should allow the current to pass through to meet 1.5 times greater than the maximum rated current of the room air conditioner. This power branch line should be prevented from being connected to other high-power electrical appliances to avoid fire or fuse blowing due to line overload.
6.1.1.2 Electrical wiring
Check the connection status of the indoor and outdoor units, and the status of the electronic controller. 6.1.2 Installation status
Check the installation (sealing) status of the indoor and outdoor units, the connecting pipes, and the connectors, check the installation parts and installation surfaces of the indoor and outdoor units, and check the connection wires, connectors, and connection points of the indoor and outdoor units. 6.1.3 Maintenance of key components
6.1.3.1 Indoor fan inspection
Easy to turn by hand without abnormal noise; clean appearance. 6.1.3.2 Electric control board inspection
Remove the dust accumulated on the electric control board; clean the receiving head; protection and moisture-proof status of the electrical parts such as the circuit board. 6
B Indoor terminal inspection
Remove the deposited dust; check the connection status. 6.1.3.4 Drainage pipe inspection
Clear the internal scale of the insulation water pipe and the external water pipe wall, and clean the internal attachments. 6.1.4 Consumable parts
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Check whether the refrigerant is leaking, check the working efficiency of auxiliary functional components such as dehumidification, sterilization, ozone, dust collection, and negative ion generation, and make replacement suggestions based on the usage time and usage status. 6.1.5 Product safe service life
Refer to GB/T21097.1-2007, and check the service life based on the product sales invoice and factory nameplate. 6.2 Test
Plug in the room air conditioner power plug, turn on the switch, and check whether the main status performance such as cooling, heating, air supply, temperature control, etc. is normal. When it is necessary to compare the effects before and after cleaning, test again after cleaning and record the main performance parameters (such as: operating voltage, current, power consumption, system pressure, outlet temperature, wind speed, temperature drop [rise] curve, etc.) data.
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