WO2021133151A1 - Dispositif de filtration - Google Patents

Dispositif de filtration Download PDF

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Publication number
WO2021133151A1
WO2021133151A1 PCT/MY2020/000023 MY2020000023W WO2021133151A1 WO 2021133151 A1 WO2021133151 A1 WO 2021133151A1 MY 2020000023 W MY2020000023 W MY 2020000023W WO 2021133151 A1 WO2021133151 A1 WO 2021133151A1
Authority
WO
WIPO (PCT)
Prior art keywords
filtering device
refrigerant
connecting pipes
filter unit
flushing
Prior art date
Application number
PCT/MY2020/000023
Other languages
English (en)
Inventor
Kwee Heng YAP
Original Assignee
Speed Car Auto Parts Sdn Bhd
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 Speed Car Auto Parts Sdn Bhd filed Critical Speed Car Auto Parts Sdn Bhd
Publication of WO2021133151A1 publication Critical patent/WO2021133151A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/001—Charging refrigerant to a cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/002—Collecting refrigerant from a cycle

Definitions

  • the invention relates to a filtering device for a servicing machine of an air conditioning (AC) system or a refrigerating system.
  • the invention relates to a filtering device which is to be equipped to a flushing machine or an AC servicing machine for flushing and cleaning of the AC system, particularly the automotive AC system of a vehicle.
  • the heating, ventilation and AC system in the industry or household, domestic or industrial refrigerating system or AC system of an automobile is required to be regularly serviced so that the condition of the system can be well maintained.
  • the service and maintenance of the automotive AC system is capable of keeping the interior of the vehicle effectively cool, as well as reducing the risk of failure of the AC system.
  • the AC system of a vehicle can be serviced by physical cleaning of the condenser, cooling coil and compressor, replacing of coil filter, leakage checking, oil flushing, refilling of cooling fluid or refrigerant, and others.
  • Most of these AC system service and maintenance tasks can also be carried out by an AC servicing machine, which is generally known in the art as a flushing machine.
  • a flushing process is considered an essential part of the AC service and maintenance processes, as this process is applied to remove impurities from the cooling fluid or refrigerant of the AC system.
  • impurities could be dirt, oils, contaminants or solid residues, including rubber and metal residues.
  • Impurities left in the refrigerant or the internal components of the AC system may clog up or damage the AC system, particularly its compressor, condenser, valves and cooling coil. Acidic contaminants may even cause corrosion to the internal components of the system. Therefore, it would be necessary that the impurities be removed from the AC refrigerant before such refrigerant is recycled back to the AC system and causes further damage to the system.
  • the condition of the system could be generally maintained or improved.
  • the AC system may work more effectively to produce cleaner and cooler air.
  • the lifespan of the AC system and its internal components may also be prolonged.
  • a considerable amount of such impurities removed from AC system may remain in the flushing machine, resulting from said AC flushing or servicing process.
  • the impurities may also cause clogs, corrosions or damage to the internal components of the flushing machine, such as the solenoid valves, compressor, and others, the flushing machine may soon encounter various technical issues after a few rounds of flushing, including shortening of the machine’s service life.
  • China patent publication no. 206138819 discloses a filter for use in filtering the air conditioner pipelines, wherein the filter is cylindrical in shape and containing a filter screening drum.
  • This filter contains an automated back flushing system which may serve as a maintenance mechanism for the AC system.
  • the filter is used for maintaining the AC system, there is no disclosure in this document on how this filter is connected or integrated with the AC system.
  • This filter applies a filtering mechanism by applying a water purifier cartridge and a water tank. The document also does not provide any disclosure on whether the filter can be equipped to a flushing machine for servicing the AC system.
  • US 5,117,641 discloses a refrigerant recovery apparatus, which is to be connected to an AC system for recovering refrigerant when the AC system requires maintenance.
  • This apparatus contains a few pipelines for transferring the liquid refrigerant, and a filter dryer which filters the refrigerant at the return line.
  • the filter dryer is internally located within the apparatus for removing moisture and impurities, while the liquid pump of the apparatus will pump the refrigerant back through the AC system to perform the flushing. It is however not disclosed in this document on how a flushing machine can be connected to this filter dryer or how the filter dryer could facilitate the work of the flushing machine to improve the AC flushing performance.
  • some of the commercially available flushing machines in the industry may contain a filtering member which is located within the machines.
  • Such internally located filtering member is not visible to the mechanics hence does not provide any performance-checking or maintenance advantage to the flushing machine.
  • These filtering members also do not provide any additional or performanceenhancing mechanism before or after the AC flushing process. Therefore, it remains a technical challenge in the art in providing a filtering device or mechanism which could efficiently overcome the technical issues associated with the performance and maintenance of the flushing machine.
  • One of the objects of the invention is to provide a filtering device which is capable of facilitating the flushing or servicing works of a flushing machine, while preventing or reducing the blockage and damage of the internal components of the flushing machine, thus prolonging its service life.
  • the invention also aims to provide a filtering device which can maintain or enhance the performance of AC servicing process, so that noticeably cleaner refrigerant could be returned to the AC system after the AC servicing process.
  • a filtering device for facilitating service and maintenance of an AC system (170) or a refrigerating system by a flushing machine (160), comprising connecting pipes (108) having at least two ends (104, 106), adapted for delivering refrigerant from the AC system (170) or the refrigerating Systran from either one of the ends (104, 106) to the other end; at least one filter unit (102) mounted to the connecting pipes (108), for removing impurities from the refrigerant which passes therethrough; and a plurality of one-way valves (112, 114, 116, 118) respectively assembled at predetermined positions along the connecting pipes (108) for controlling the irreversible flow of the refrigerant along
  • either one of the at least two raids (104, 106) of the connecting pipes (108) is adapted to connect to the flushing machine (160) and the other is adapted to connect to the AC system (170), in such a way that the refrigerant from the AC system (170) enters the filtering device (100) to be filtered before entering or after exiting the flushing machine (160).
  • the filtering device (100) further comprises a casing (110) enclosing the connecting pipes (108), the at least one filter unit (102) and the plurality of one-way valves (112, 114, 116, 118).
  • the casing (110) further comprises a window (122) which allows visual inspection of the filter unit (102).
  • the filtering device (100) further comprises a lighting means (128) mounted besides the filter unit (102).
  • filtering device (100) further comprises a reflecting means (130) adjacent to the filter unit (102).
  • the filter unit (102) comprises a filter cartridge (120).
  • the filter cartridge (120) is replaceable.
  • a further embodiment of the invention discloses that the filtering device (100) further comprises a plurality of fastening means (132, 134, 142, 144, 146, 148, 150, 152, 154, 156) for securing the filter unit (102) and the plurality of one-way valves (112, 114, 116, 118) to the connecting pipes (108).
  • the filtering device (100) further comprises one or more additional filter units.
  • the filtering device (100) of the invention may serve as a protective shield to a flushing machine, as it is able to screen through the refrigerant from an AC system before it enters the flushing machine, hence preventing, or reducing the amount of, the impurities from entering the internal components of the flushing machine.
  • the filtering device (100) of the invention can also be applied for running an initial check on the condition of the refrigerant within an AC system or a refrigerating system, before the service and maintenance processes are carried out, so that a flushing machine can be refrained from being used for flushing highly contaminated refrigerant which may cause major damage to the internal components of an AC system.
  • the filtering device (100) could also facilitate a flushing machine in providing a more cost-efficient AC service and maintenance processes, such as providing an additional filtering mechanism to the refrigerant after the flushing process under certain modes of flushing machine It is also designed to be compatible with a wide range of flushing machines for the AC system service and maintenance.
  • FIG. 1 is a schematic diagram of the filtering device (100) as described in one of the embodiments of the invention, showing the respective circuits of the flow of refrigerant through the filtering device (100), the flushing machine (160) and the AC system (170), during different phases of flushing and filtering process.
  • Figure 2 is a front view of the filtering device (100) without the front cover of the casing (110), as described in one of the embodiments of the invention.
  • Figure 3 is a back view of the filtering device (100) without the back cover of the casing (110), as described in one of the embodiments of the invention.
  • Figure 4 is an external view of the filtering device (100), showing the exterior design of the casing (110) as described in one of the embodiments of the invention.
  • Figure 5 is the side view of the filtering cartridge (120) as described in one of the embodiments of the invention.
  • the invention discloses a filtering device (100) for facilitating service and maintenance of an AC system (170) or a refrigerating system by a flushing machine (160), comprising connecting pipes (108) having at least two ends (104, 106), adapted for delivering refrigerant from the AC system (170) or the refrigerating system from either one of the aids (104, 106) to the otha end; at least one filter unit (102) mounted to the connecting pipes (108), for removing impurities from the refrigerant which passes therethrough; and a plurality of one- way valves (112, 114, 116, 118) respectively assembled at predetermined positions along the connecting pipes (108) for controlling the irreversible flow of the refrigerant along the connecting pipes (108) and creating unidirectional flow of the refrigerant through the filter unit (102), irrespective of the flow is delivaed from which end of the connecting pipes (108), such that the filtered and unfiltaed refrigerant flow through separate circuits within the connecting pipes (
  • Illustrated in Figure 1 is a schematic diagram of the filtering device (100), which is coupled with a flushing machine (160) fa the service and maintenance of an AC systan (170), as described in one of the anbodiments of the invention.
  • the filtering device (100) can also be adapted to be used with the flushing machine (160) for the service and maintenance of a refrigerating system, such as a domestic or an industrial refrigerating or freezing system.
  • the fihering device (100) is heran described along with a flushing machine (160) applied for the flushing process of an automotive AC system (170) in a vehicle.
  • a flushing fluid or refrigerant is applied in the flushing process for AC service and maintenance.
  • the refrigerant is a cooling fluid used in an AC or refrigerating system. It can be in the form of gas or compressed liquid.
  • the refrigerant described herein can be any commercially available refrigerant, including tetrafluoroethane (R-134a, or commercially known as Freon-134a), dichlorodifluoromethane (R-12, or commercially known as Freon-12), chlorodifluoromethane (R-22), 2,3,3,3-tetrafluoropropene (HFO- 1234yf), or a combination that is commercially known as R-406a (which is made up of chlorodifluoromethane (R-22), isobutane (R-600a) and chlorodifluoroethane (R-142b)).
  • the filtering device (100) of the invention can comprise three main components, i.e. an assembly of connecting pipes (108), at least one filter unit (102) and a plurality of one-way valves (112, 114, 116, 118).
  • the connecting pipes (108) can contain at least two ends (104, 106), for example, a first end (104) and a second end (106).
  • the connecting pipes (108) may also have additional two ends, such as a third end and a fourth end. Either one of the two ends (104, 106) of the connecting pipes (108) can be adapted to connect to the AC system (170) or to the flushing machine (160).
  • the first end (104) of the connecting pipes (108) can be adapted to connect to the AC system (170), whereas the second end (106) of the connecting pipes (108) can be adapted to connect to the flushing machine (160), as depicted in Figure 1.
  • the refrigerant, or the flushing fluid from the flushing machine (160) can be delivered from the AC system (170) to the filtering device (100) to be filtered before entering the flushing machine (160) and returning to the AC system (170).
  • the refrigerant can be delivered from the AC system (170) to the filtering device (100) to be filtered after exiting the flushing machine (160) and then returning to the AC system (170), during another mode of the flushing machine (160).
  • either end of the connecting pipes (108) can be connected to the AC system (170), at its high-side or low-side fittings, in order to receive the refrigerant from the AC system (170) and deliver it to the filter unit (102).
  • both the first and the second ends (104, 106) of the connecting pipes (108) can be adapted as inlet or outlet for the flow of refrigerant, respectively during different phases of the AC flushing process or different modes of the flushing machine (160). These different modes of the flushing are generally preset or configured within the flushing machine (160) aiming to flush and clean different internal components of the AC system (170).
  • the connecting pipes (108) is preferably made of pressure-resistant materials of metals or non-metals.
  • the connecting pipes (108) can be made of copper, stainless steel, zinc, copper or polyvinyl chloride (PVC). It is also preferable that the connecting pipes (108) are made of rust-resistant materials.
  • Figure 1 also illustrates that the filtering device (100) comprises a casing (110) which encloses the filter unit (102), connecting pipes (108) and the one-way valves (112, 114, 116, 118).
  • the casing (110) can be made of various metal or non-metal materials, including stainless steel, zinc, aluminium, wood, or polymeric materials such as polypropylene, polyvinyl chloride (PVC), acrylic, or the like.
  • the casing (110) is made of coated metal.
  • the casing (110) is made of an opaque material. Nevertheless, one skilled in the art may appreciate that the casing (110) can also be made of transparent or translucent materials for a more aesthetic look or a clearer view of the filtering mechanism within the filtering device (100).
  • the casing (110) can comprise at least two openings (124, 126) for receiving the at least two ends (104, 106) of the connecting pipes (108).
  • the casing (110) can comprise a first opening (124) and a second opening (126).
  • the casing can comprise an additional pair of openings, for example a third opening and a fourth opening, to adapt to the third end and the fourth end of the connecting pipes (108).
  • the first and the second openings (124, 126) can be located opposite from one another, as shown in Figure l.
  • the openings ( 124, 126) allow the ends (104, 106) ofthe connecting pipes (108) to connect to the flushing machine (160) and the AC system (170) via other external pipelines.
  • the filtering device (100) may employ at least one filter unit (102).
  • This filter unit (102) can be mounted to and engaged with the connecting pipes (108) between the at least two ends (104, 106), so as to remove any impurities from the refrigerant which passes therethrough from either end of the connecting pipers (108) to the other end.
  • the filter unit (102) can be located in such a predetermined position on the connecting pipes, in relation to the plurality of one-way valves (112, 114, 116, 118), so that the refrigerant passes through the filter unit (102) in a single direction (unidirection), irrespective of the flow is delivered from which end of the connecting pipes (108).
  • Such unidirectional flow of the refrigerant through the filter unit (102) is shown by an arrow ( ⁇ ) in Figure 1.
  • the unidirectional flow of the refrigerant within the filtering device (100) can be achieved by the unique assembly of the plurality of one-way valves (112, 114, 116, 118).
  • One-way valves are also known as check valves. These valves (112, 114, 116, 118) contains two ports at both ends to allow the flow of fluid thaethrough from the higher pressure end to the Iowa pressure end.
  • the filtering device (100) comprises four units of one-way valves, i.e. the first one-way valve (112), the second one-way valve (112), the third one-way valve (112) and the fourth one-way valve (112).
  • the filtaing device (100) can comprise five or more one-way valves.
  • the plurality of one-way valves (112, 114, 116, 118) of the invention are respectively assembled at predetermined positions along the connecting pipes (108) to create the unidirectional flow of the refrigerant.
  • these one-way valves (112, 114, 116, 118) are assembled in such a way to control the flow of refrigerant within the filtering device (100) during each cycle of filtering process, so that the refrigaant passes through the filter unit (102) in a single direction, irrespective of the refrigaant is flushed from which end of the connecting pipes (108).
  • the flow of the refrigerant along the connecting pipes (108) could also be kept irrevasible with the unique assembly of these one-way valves (112, 114, 116, 118).
  • the filtaed and unfiltered refrigerant would not be mixed with one anotha when passing through the set of connecting pipes (108) as they pass through separate circuits from one anotha.
  • Figure 1 demonstrates the respective circuits of the flow of refrigaant through the filtering device (100) during different phases of flushing and filtering of the AC system.
  • the servicing process of the AC system includes a low-side flushing phase, aiming to flush and clean the condensa (172) and the compressor (174); followed by a high-side flushing phase, in which the cooling coil (176) can be flushed or cleaned.
  • the servicing process of the AC system only includes a low-side flushing phase.
  • these different phases of flushing process are subject to the settings configured in the flushing machine (160).
  • a two-way flushing machine would be configured with both a low-side flushing mode to conduct the low-side flushing, and a high-side flushing mode to conduct the high-side flushing.
  • the filtering device (100) of the invention could be applied in the same manner to facilitate the AC flushing process of different flushing machines during different flushing modes.
  • the refrigerant can be flushed from the flushing machine (160) into the internal circuit of the AC system (170).
  • the unfiltered refrigerant from the AC system (170), particularly from the compressor (174) and the condenser (172), can be delivered into the filtering device (100) via the first «id (104) of the connecting pipes (108).
  • the flow of the refrigerant through the filter unit (102) and connecting pipes (108) during an exemplary high-side flushing phase is shown in Figure 1 in dashed arrow line ( __ ⁇ ).
  • the unfiltered refrigerant from the AC system (170) can be delivered to the flushing machine (160) for flushing and then enter the filtering device (100) via the second end (106) of the connecting pipes (108).
  • the unfiltered refrigerant can flow through the second one-way valve (114) and passes through the filter unit (102) to be filtered therethrough.
  • the filtered refrigerant can then flow through the third one-way valve (116) and exit the filtering device (100) via the first «id (104) to return to the AC system (170).
  • the condenser (172) and the compressor (174) of the AC system (170) are considered the relatively dirtier and more contaminated components which may be greatly clogged by impurities.
  • the filtered refrigerant flows out from the filtering device (100) via a separate circuit from that of the unfiltered refrigerant from the AC system (170). Therefore, it could prevent or greatly reduce the impurities originating from the condenser (172) and compressor (174) from entering the flushing machine (160).
  • the filtering device (100) can serve as an additional filtering mechanism to the flushed refrigerant from the flushing machine (160), thus ensuring cleaner refrigerant return to the AC system (170).
  • an AC system servicing process may contain a few cycles of low-side flushing phase and high-side flushing phase, depending on the settings of the flushing machine (160).
  • the flushing machine (160) may be configured to conduct a low-side flushing phase and a high-side flushing phase, repeatedly for two to three cycles of 5 to 15 minutes each.
  • the flow of refrigerant through the filter unit (102) would be kept unidirectionally so that the filtered refrigerant would not undergo a back flow within the filter unit (102).
  • the filtered refrigerant passed through the filter unit (102) could be guided by the one-way valves(112, 114, 116, 118) along the connecting pipes (108) to exit the filtering device (100) in an irreversible manner, irrespective of the different flushing modes performed by the flushing machine (170) or different directions of pressure from the internal circuit of the AC system (170).
  • the casing (110) of the filtering device (100) can be formed into various three-dimensional structures, including cuboidal, cubical, cylindrical, trapezoidal or prismatic structures. In certain embodiment, the casing (110) is formed into a substantially trapezoidal structure.
  • the casing (100) can be made into a one- piece structure or assembable pieces, containing a front cover and a back cover.
  • Figure 2 shows a front view of the filtering device (100) as described in one of the embodiments of the invention, without the front cover of the casing (110), demonstrating the assembly of the filter unit (102), the first and the second opening (124, 126), and the connecting pipes (108) within the filtering device (100).
  • the filter unit (102) can comprise a filter housing (140).
  • the filter housing (140) is provided with a substantially cylindrical, cuboidal or tubular structure.
  • the filter housing (140) can be made of rust-resistant and pressure-resistant materials, including metals or non-metals.
  • the filter housing (140) is made of aluminium, stainless steel or polymers such as polypropylene.
  • the filter unit (102) is deployed relatively at the front part of the casing (110). Accordingly, the assembly of connecting pipes (108) and the plurality of one-way valves (112, 114, 116, 118) are located relatively at the rear part of the casing (110) as shown in Figure 3. In certain embodiments, the filter unit (102) can be located side-by-side with the assembly of connecting pipes (108) and the oneway valves (112, 114, 116, 118) within the casing (110). Alternatively, the filter unit (102) can be located at the relatively upper part of the assembly of connecting pipes (108) and the one-way valves (112, 114, 116, 118).
  • the filtering device (100) comprises a plurality of fastening means (132, 134, 142, 144, 146, 148, 150, 152, 154, 156).
  • the filter unit (102) can be secured to the connecting pipes (108) by the first set of fastening means (132, 134), while the plurality of one-way valves (112, 114, 116, 118) can be secured to the connecting pipes (108) by the second, third, fourth and fifth sets of fattening means (142, 144, 146, 148, 150, 152, 154, 156).
  • the fastening means (132, 134) can be metal or non-metal nuts, such as coupling nuts, lock nuts, flange nuts or the like.
  • Figure 4 is an external view of the filtering device (100), showing the exterior design of the casing (110) as described in one of the embodiments of the invention.
  • the casing (110) of the filtering device (100) can comprise a window (122) which allows visual inspection of the filter unit (102), particularly when the casing (100) is made of opaque materials.
  • the filtering device (100) allows the filtering mechanism that takes place within the filter unit (102) to be inspected during the flushing and filtering processes.
  • An AC service worker or mechanic carrying out the flushing or servicing process would be able to ascertain the performance of the flushing or servicing process, by assessing the clarity of the refrigerant which passes through the filter unit (102).
  • the window (122) also allows the initial check on the condition of the refrigerant within the AC system or the refrigerating system before the service and maintenance processes are carried out, where the turbidity of the refrigerant that passes through the filter unit (102) can be assessed. This allows the AC service workers or mechanics to determine whether the AC system is still in its serviceable condition and able to maintain its performance level after the service and maintenance processes, or it is highly contaminated that flushing is not recommended.
  • the filtering device (100) further comprises a lighting means (128) mounted besides the filter unit (102).
  • the lighting means (128) can be a light-emitting diode (LED), a fluorescent or incandescent bulb.
  • the filtering device (100) further comprises a reflecting means (130) adjacent to the filter unit (102).
  • the reflecting means (130) is a glass mirror, acrylic mirror or plastic mirror.
  • the reflecting means (130) can also be reflecting sticker.
  • the lighting means (128) and the reflecting means (130), as shown in Figure 2 are adapted to assist the inspection of the condition within the filter unit (102) through the window (122), while providing a better aesthetic look to the filter unit (102).
  • the lighting means (128) can be powered by a power supply (158), preferably a potable power supply such as battery.
  • the filtering device (100) can be provided with different exterior design or aesthetic look. For example, it can contain a brand label (136). It can also contain a user panel (138). The user panel (138) can comprise a switch for the lighting means (128), user instruction, or others.
  • FIG. 5 depicts a filter cartridge (120) applied in the filter unit (102), in accordance with one embodiment of the invention.
  • the filter cartridge (120) can be a porous material, preferably made of a mechanical media.
  • the filter cartridge (120) can be a wire mesh, polymeric netting, nylon cloths, or the like.
  • the filter cartridge (120) is replaceable.
  • the filtering device (100) further comprises one or more additional filter units.
  • the filtering device (100) further comprises an additional filter unit
  • the additional filter unit can be adapted to facilitate additional flushing modes configured within the flushing machine (160).
  • the filtering device ( 100) can comprise a pressure meter accommodated within the casing (110). The pressure meter can be located before the filter unit (102) and adapted to check the pressure of the refrigerant in the filtering device (100).
  • the filtering device (100) of the invention can be used with a wide range of flushing machine (160), including one-way flushing machine and two-way flushing machine (160), as described in the foregoing description. Asides from the service and maintenance of automotive AC system, the filtering device (100) can also be equipped to the flushing machine (160) for checking or cleaning different internal components of domestic or industrial refrigerating systems, including fridges and freezers.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un dispositif de filtration (100) permettant de faciliter le service et l'entretien d'un système de climatisation (170) ou d'un système de réfrigération au moyen d'une machine de rinçage (160), le dispositif comprenant des tuyaux de raccordement (108) comportant au moins deux extrémités (104, 106), et conçus pour distribuer du fluide frigorigène, en provenance du système de climatisation (170) ou du système de réfrigération, de l'une des extrémités (104, 106) vers l'autre extrémité ; au moins une unité de filtration (102) montée sur les tuyaux de raccordement (108) et permettant d'éliminer les impuretés du fluide frigorigène passant à travers ladite unité ; et une pluralité de soupapes de retenue (112, 114, 116, 118) assemblées respectivement à des positions prédéfinies le long des tuyaux de raccordement (108), afin de commander l'écoulement irréversible du fluide frigorigène le long des tuyaux de raccordement (108) et de créer un écoulement unidirectionnel du fluide frigorigène à travers l'unité de filtration (102), indépendamment de l'extrémité des tuyaux de raccordement (108) distribuant l'écoulement, de sorte que le fluide frigorigène filtré et non filtré coule à travers des circuits séparés à l'intérieur des tuyaux de raccordement (108).
PCT/MY2020/000023 2019-12-23 2020-12-21 Dispositif de filtration WO2021133151A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI2019007732 2019-12-23
MYPI2019007732 2019-12-23

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WO2021133151A1 true WO2021133151A1 (fr) 2021-07-01

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Citations (5)

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Publication number Priority date Publication date Assignee Title
US4887435A (en) * 1988-06-23 1989-12-19 Anderson Jr David W Refrigeration cleaning and flushing system
US5638689A (en) * 1995-03-17 1997-06-17 Mainstream Engineering Corporation Portable refrigerant recovery system
US20040035805A1 (en) * 2002-08-21 2004-02-26 Hansen Dennis B. Method and apparatus for flushing contaminants from a container of fluids
WO2004069366A2 (fr) * 2003-01-27 2004-08-19 Paul Joseph Sullivan Dispositif, systeme et procede de rinçage de substances contaminantes convenant tout particulierement pour l'entretien des systemes de refrigeration
EP3483527A1 (fr) * 2017-11-09 2019-05-15 Carrier Corporation Système de purge de réfrigérant avec protection de membrane

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US5638689A (en) * 1995-03-17 1997-06-17 Mainstream Engineering Corporation Portable refrigerant recovery system
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WO2004069366A2 (fr) * 2003-01-27 2004-08-19 Paul Joseph Sullivan Dispositif, systeme et procede de rinçage de substances contaminantes convenant tout particulierement pour l'entretien des systemes de refrigeration
EP3483527A1 (fr) * 2017-11-09 2019-05-15 Carrier Corporation Système de purge de réfrigérant avec protection de membrane

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