CN1740730A - Cleaning device for embedded roof air conditioner heat exchanger - Google Patents
Cleaning device for embedded roof air conditioner heat exchanger Download PDFInfo
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- CN1740730A CN1740730A CN 200510097747 CN200510097747A CN1740730A CN 1740730 A CN1740730 A CN 1740730A CN 200510097747 CN200510097747 CN 200510097747 CN 200510097747 A CN200510097747 A CN 200510097747A CN 1740730 A CN1740730 A CN 1740730A
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- air conditioner
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Abstract
Description
Technical field
The present invention relates to clean the cleaning device of the heat exchanger of the air conditioner that ceiling-mounted is provided with; say in detail; relate to by not using chemical detergent, significantly reducing the consumption of rinse water and shorten the operating time and reduce the cleaning cost, do not pollute the washing apparatus of air conditioner of the special attention environmental protection in draining, sea, river because of chemical detergent.
Background technology
Now, all by automatic cleaning, manually clear is removed dirts such as the dust paid on the coil pipe blade (heat exchanger) of the air conditioner of ceiling-mounted type, oil smoke, carries out the cleaning of air conditioner, with recovery heat efficient, prevent to become the pollution sources of room air.
Up to now, in order to clean the air conditioner that is arranged on the ceiling, a water can not remove greasy dirt dirt etc., the therefore general chemical detergent that uses.In addition, also employing is used cleaning machine, is peeled off the cleaning method of the mobile cleaning of dirt by jet cleaning agent and water under high pressure.
But, use the method for chemical detergent, usually bring the danger of public hazards and environmental pollution, in addition, when handling washing agent, need nertralizer and a large amount of rinse water, the result has funds to increase and produces shortcoming such as a large amount of drainings.
In addition, use the method for automatic rinser, owing to need high pressure, thereby must form bit by bit to flow and clean the mode of small area, therefore exist for and make cleaning be close to perfect and need long-time this shortcoming.
In addition, above-mentioned existing method needs a large amount of plumbing, and therefore, existence follows cleaning operation may cause many problems such as maximization, the flexible pipe of secondary pollution and device coil back and forth on precision machinery factory, research institute, hospital, office and other places.Therefore, the problem that existence can not simple application.
The inventor develops a kind of washing apparatus of air conditioner, has proposed patent application earlier.This washing apparatus of air conditioner is peeled off the hot water that sprays set point of temperature after the dirt, again by the steam that uses set point of temperature and cleaned and do not need to use chemical detergent, cleans the back and purges with compressed air and remove moisture content, and is dry at short notice.Like this, obvious shortening time of finally finishing cleaning.
Yet this device is although be epoch-making not needing the chemical detergent this point, but,, must carry out the temperature control of steam and hot water for damaged blade not, in addition, not necessarily can both satisfy the requirement of cleaning in the short time with small amount of steam and hot water to any air conditioner.Promptly must clean and need a large amount of steam and hot water with the steam of set point of temperature and hot water for damaged blade not.In addition, make nozzle be cleaned position uperize and the hot water of body 29～30cm from distance now.Therefore, because blade makes with thin metal, thereby, the problem of bending blade, thermal efficiency reduction also takes place sometimes.
Summary of the invention
The present invention is in view of these problems, and purpose provides temperature control also not damaged blade, the washing apparatus of air conditioner that can clean at short notice with a spot of steam and hot water that does not carry out steam and hot water especially.
In order to achieve the above object, the result that the present inventor concentrates on studies, find, by nozzle is cleaned in the position near cleaning blade, even do not carry out the temperature control of steam and hot water especially, do not worry bending blade or damage yet, can clean in the short time, realized the present invention with small amount of steam and hot water.
That is, the present invention is a kind of ceiling-mounted type air conditioner heat exchanger cleaning device, and it has the bucker that receives the washing lotion of cleaning ceiling-mounted type air conditioner and is positioned at the ejection steam of this bucker top and the washer jet of hot water.In this cleaning device, have: identification (the three-dimensional detection) is as the detector that is cleaned the heat exchanger shape of body; The shape of the heat exchanger of blank determination does not contact washer jet but near being cleaned the means that body stretches.In addition, the washer jet of ejection steam and hot water can be single washer jet, also can be the washer jet that separates steam and hot water.
In a word, aim of the present invention is by making nozzle near the coil pipe blade, with steam and hot water cleaning, even do not carry out the temperature control of steam and hot water especially, also do not make coil pipe bending blade and damage, can cleaning in the short time with a spot of steam and hot water.
It is desirable to, have: receive air conditioner washer jet, the ejection of the bucker of the cleaning draining of above-mentioned cleaning ceiling-mounted type air conditioner, the ejection steam that is positioned at this bucker top and hot water dry with compressed-air actuated spray tip, observe video camera and discern the detector of the shape of heat exchanger.Detector by this air conditioner washer jet, spray tip, observation video camera and identification heat exchanger shape constitutes head.(the present invention the 2nd aspect).
It is desirable to, have the X-axis drive division that above-mentioned washer jet, air nozzle and observation video camera are moved in the horizontal direction.(the present invention the 3rd aspect).
It is desirable to, have in the horizontal direction and be the θ axle drive division of the above-mentioned X-axis drive division of centre-driven rotation with the Z axle.(the present invention the 4th aspect).
It is desirable to, have the Z axle drive division that drives above-mentioned X-axis drive division and above-mentioned θ axle drive division integral body up and down.(the present invention the 5th aspect).
Above-mentioned observation video camera constitutes that ccd video camera and White LED light source are accommodated in the clear glass is in the housing of double-layer structure in front, between this two-layer housing, form by compressed-air actuated path, formation can prevent the heat of steam and hot water, prevent the air curtain layer of above-mentioned front clear glass knot mist simultaneously, so, can prevent face glass knot mist, by monitor can Real Time Observation, video recording clean before, clean the state after neutralization is cleaned.(the present invention the 6th aspect).
It is desirable to, the detector of discerning the shape of above-mentioned heat exchanger forms vertical range detector and horizontal range detector.(the present invention the 7th aspect).
Above-mentioned vertical range detector is used to measure when lifting air conditioner to the distance of ceiling, the height of calculating heat exchanger or obtain and the distance (the present invention the 8th aspect) of the nozzle when cleaning ceiling.
Above-mentioned horizontal range detector, 360 ° of measurements of limit rotation θ axle limit upset are the distance of the horizontal direction of the nozzle at center and heat exchanger with the Z axle, thereby measure the shape of heat exchanger.By the horizontal range detector is set, identification is the shape and the height of the heat exchanger at center with the Z axle, can make the distance of heat exchanger and washer jet, compressed-air atomizer and observation video camera approaching as far as possible, spread all over everywhere and do not contact and to clean from minimum distance.(the present invention the 9th aspect).
It is desirable to, the horizontal vertical switch means is set, it changes the direction of the washer jet, compressed-air atomizer and the observation video camera that form one in level and vertical direction by air cylinder driven.(the present invention the 10th aspect).
It is desirable to, be provided for driving simultaneously 3 motor drivers of three motor of X-axis, Z axle and θ axle.(the present invention the 11st aspect).
It is desirable to, balancer is installed in the bottom of above-mentioned lifting head, it is used for when lifting, and protection as far as possible is stable to be made below center of gravity is positioned at.(the present invention the 12nd aspect).
It is desirable to, have the signal cable that is used to control head with connector, supply with the compressed air connector and supply with steam, hot water, rinse the connector of scouring water, this connector is the indication action of sending according to control module and constitute (the present invention the 13rd aspect).
It is desirable to, have the high temperature pressure pump, when it is lower than meta when boiler jar middle water level, supplies with super electrolysis buck from supplying tank and reach upper (canful) up to water level, when receiving from control module when rinsing the indication of washing, supplying water from supplying tank (rinsing wash water) directly is sent to washer jet.(the present invention the 14th aspect).
It is desirable to, adopt by control module and send the valve of opening the pipeline that takes out the steam in the boiler jar when magnetic valve that indication carries out switch is formed in steam clean, the valve of when hot water cleans, opening the pipeline that takes out the hot water in the boiler jar, wash with supplying tank by the valve of high temperature pressure pump rinsing to open when washing down to the pipeline of nozzle supply from rinsing.(the present invention the 15th aspect).
It is desirable to, boiler controller is set, when it was the next at the water level that detects the boiler jar, control high temperature pressure pump sucked with supplying tank from cleaning fluid (super electrolysis buck), supply with continuously to the boiler jar, and be upper up to sensed water level; The water level of control heater in the boiler jar closed before reaching meta, to prevent dry combustion method; Detect after the meta water level when water temperature be design temperature below or jar internal pressure is to set value when following, heating reaches setting value up to temperature and pressure, under pressure limit of setting and temperature, Kai Heguan is carried out in the heating of the water in the boiler jar, the temperature and pressure in the control boiler jar; When input abnormality signal, heater and pump are stopped, controlling whole magnetic valves is closed condition.(the present invention the 16th aspect).
It is desirable to, stop to handle with the processing of programme-control shape store, cleaning treatment and the abnormality of using CPU.(the present invention the 17th aspect).
It is being the center in the position that is cleaned lifting head under the body that above-mentioned shape store is handled, the processing of the shape that measure, storage is cleaned body (shape of heat exchanger, highly, the position of fan electromotor construction bolt), be to be used to prevent to be cleaned body (heat exchanger, ceiling) contact with nozzle, (approaching as far as possible) spreads all over the processing (the present invention the 18th aspect) of cleaning everywhere again at certain intervals.
Above-mentioned cleaning treatment is set scavenging period by cleaning with fouling condition automatically.Should automatically clean to ceiling clean, coil pipe blade (heat exchanger) cleans and carries out steam, hot water, rinses the indicative of settings of washing and drying up with compressed air, and handle (the present invention the 19th aspect) automatically according to setting.
In addition, it is desirable to, as image record portion, the hard disk camera device of mounting strap DVD recording function, the image that its observation video camera is shot with video-corder is recorded in hard disk, uses touch panel displays at monitor and operation where necessary, perhaps is recorded in the DVD logging machine.(the present invention the 20th aspect).In addition, can the limit carry out the image manipulation limit at touch panel and carry out cleaning operation.When the operation beginning, can show the image of shooting with video-corder as monitor.
[effect of invention]
As mentioned above, according to the present invention, because nozzle is cleaned near the coil pipe blade, so performance do not damage the coil pipe blade, do not use chemical detergent, the epoch-making effect that can clean in the short time with a spot of steam and hot water.
Description of drawings
Fig. 1 is the stereogram of expression embodiments of the invention;
Fig. 2 is the enlarged drawing in the hole of Fig. 1;
Fig. 3 (a) is that front elevation, Fig. 3 (b) of the lifting head of device of the present invention is side view;
Fig. 4 (a) is that front elevation, Fig. 4 (b) of the state that cleans with the lifting head of expression is part sectioned view;
Fig. 5 (a) is observation of the present invention with stereogram, Fig. 5 (b) of video camera is that front elevation, Fig. 5 (c) are side views;
The plane of the heat exchanger when Fig. 6 is the expression cleaning and the driving track of nozzle;
Fig. 7 (a) is manual cleaning of the present invention with side view, Fig. 7 (b) of nozzle unit is that front elevation, Fig. 7 (c) are stereograms;
Fig. 8 is a system block diagrams of the present invention;
Fig. 9 is the stereogram of boiler of the present invention unit;
Figure 10 (a) is that front elevation, Figure 10 (b) of boiler of the present invention unit is side view.
The specific embodiment
Below, with reference to the description of drawings embodiments of the present invention.
Fig. 1 represents one embodiment of the invention, the upper end open portion of bucker (funnel) 3 is embedded on the ceiling-mounted type air conditioner (being cleaned body) 1 that is arranged on ceiling, and the displacement can 14 of the inner fixed filter on the scupper hose 9 that is connected in bucker 3 lower ends by hose coupling 8 and the chassis 15 is connected.At lifting bucker (funnel) 3 o'clock, in order to keep stable as far as possible, as far as possible away from be formed centrally the positions of four lifting fulcrums, the front that forms bucker 3 can fold, so that carrying easily.
Cleaned the washing lotion of air conditioner, received,, filtered, be housed in the displacement can 14 by drain filter by scupper hose 9 by bucker 3.In addition, 2 are heat exchangers of air conditioner 1 among the figure.
In bucker 3, the head 4 usefulness suspenders 22 of cleaning device are connected and fixed on air conditioner 1.It is all that bucker 3 covers cleaning part, is used to prevent that leakages such as cleaning fluid, dust and bacterium are to the outside.
Shown in Fig. 3 (a), head 4 install air conditioner washer jet 25, the ejection of ejection steam and hot water dry with compressed-air actuated air pressurizing unit (spray tip) 26, observe video camera 24, discern the horizontal road of shape of heat exchanger 2 from detector 27 and vertical range detector 29, X-axis drive division 23 and θ axis drive motor 28.
Like this, air pressurizing unit 26 is installed drivingly, is made it send into compressed air synchronously, thus, can carry out being cleaned the removing moisture content after body is cleaned effectively with cleaning action with washer jet 25 one.By using air pressurizing unit, can seek to save air in addition.
Shown in Fig. 2 (b), direction configuration camera head 24 and washer jet 25 in X-axis frame end portion like this, can be avoided from the outstanding low-grade fan electromotor of central portion ceiling the interference of using bolt being installed.In addition, when low-grade fans drive was positioned at away from the central authorities outside with the installation of motor with the position of bolt, controller storage bolt position can be avoided and bolt interferes ground to drive X-axis.
Shown in Fig. 2 and Fig. 3 (b), in head 4, install the nozzle rotating drive with cylinder 30, (level, vertical switch drive with) X-axis drives change gear 31, X-axis and drives to drive to drive with leading screw 39, signal cable mounted connector 39, steam and hot water supply flexible pipe 5, air with pinion 37, Z axle with pinion 32, X-axis drive motors 33, axle driving pinion B34, θ axle driving pinion A35, Z axis drive motor 36, Z axle and supply with flexible pipe 7.In addition, the lower end that the Z axle drives the sleeve pipe 57 of using leading screw 39 is installed in inside, fixing head is stable with balancer 40.
Like this, by X-axis, θ axle, three drivings of Z axle, washer jet can carry out telescopic drive, the vertical direction of horizontal direction telescopic drive, horizontally rotate driving, thereby, can make nozzle near all sites that is cleaned body in the three dimensions.Like this, in order to drive X-axis motor 33, θ spindle motor 28 and Z spindle motor 36 3 spindle motors simultaneously, as shown in Figure 8, built-in three motor drivers 58.
Above-mentioned X-axis drive division moves in the horizontal direction washer jet, air nozzle and observation video camera.Above-mentioned θ axle drive division is that center rotation drives above-mentioned X-axis drive division in the horizontal direction and with the Z axle.Above-mentioned X-axis drive division drives above-mentioned X-axis drive division and above-mentioned θ axle drive division integral body up and down.
Washer jet 25, compressed-air atomizer 26 are set and observe the horizontal vertical switch means that video camera 24 is integral, changes the horizontal vertical direction by the driving of cylinder.That is, computerized control, be implemented in horizontal range detector 27 actions when horizontally rotating, vertical range detector 29 stops, vertical range detector 29 actions when moving up and down, the action that horizontal range detector 27 stops.Like this, owing to can drive washer jet in level, vertical direction, so can clean heat exchanger and ceiling.
In the present invention, flexible automatically by the computer control washer jet, make washer jet 25 near being cleaned body (coil pipe blade).Specifically, be desirable apart from coil pipe blade 3～10cm, ideal is about 5cm (4～6cm) especially.
As shown in Figure 4, head 4 is moved up and down once to turn around with returning, shape by horizontal range detector 27 and vertical range detector 29 identification heat exchangers, and, this identifying information input computer, so, shown in Fig. 4 (a), the track of the washer jet when drawing cleaning makes washer jet 25 flexible, often leaves the distance (it is desirable to about 5cm) that is cleaned the body regulation.
Fig. 5 (a)～(c) expression is observed with video camera 24, it constitutes, and ccd video camera and White LED light source are positioned over the clear glass is in the housing of positive inner casing and shell (throttle orifice is regulated usefulness) two-layer structure, forming the path that passes through from air supply port compressed and supplied air between these two layers of housings, form air exhaust gap (air-brush throttle orifice), this slit can form the heat of anti-steam hot water, prevents the curtain layer of front knot mist of the clear glass in above-mentioned front simultaneously.At present embodiment, why using White LED light source is in order not accumulate heat.
As shown in Figure 5,,, eliminate the knot mist of front glass, prevent to generate heat in inner casing interior video cameras (CCD) by the ejection of air-brush throttle orifice by the air that air supply port flexible pipe is supplied with.By this observation video camera, can be by the image before monitor observation and the record cleaning, in the cleaning, after the cleaning.
Changing the actuator of compressed-air atomizer direction carries out with magnetic valve 70 by compressed air control respectively with ON-OFF with the control of cylinder 69, the ON-OFF of air/water nozzle (supercharging air nozzle) 26 and the air brush of observation video camera 24.In addition, as shown in Figure 8, compressed air is supplied with by air compressor portion.
On the head unit of lifting, establish the signal cable water-proof connector of control head in above-mentioned bucker 3, air is supplied with and is used connector; Steam, hot water, rinse wash water and supply with and to use connector.
Lift head unit as constituted above, move according to the indication that control module sends.
As Fig. 8, Fig. 9 and shown in Figure 10, the boiler unit has: high-temperature high pressure pump (high temperature pressure pump) 59, boiler jar 60, boiler jar water level meter 61, pressure gauge 62, pressure switch 63, safety valve 64, magnetic valve 65, boiler controller 17.
High temperature pressure pump 66 when the water level of boiler jar 60 is lower than meta, is supplied with basic ion water (cleaning fluid) up to reaching upper (canful) from supplying tank 67.In addition, wash when indication,, directly deliver to washer jet from supplying tank (rinsing wash water) 67 feedwater when receiving from control module to rinse.In addition, supplying tank has and accommodates two kinds of jars rinsing wash water and cleaning solution.
The water that boiler jar 60 is supplied with high temperature pressure pump 66 according to the indication of boiler controller 17, by heater 68 heating, makes hot water and steam and stores.
Boiler jar water level meter 61 detects the water level in the boiler jar 60, to boiler controller 17 input signals.At present embodiment, divide the water level in the Three Estate detection boiler jar 60.That is, upper is the water level during canful in jars 60, and meta is jars 60 water levels near slack tank the time, and the next is the water level when empty in jars 60.
By the pressure in the pressure gauge 62 detection boiler jars 60, Input Control Element (controller) also shows, by the pressure that pressure switch 63 detects in the boiler jar 60, carries out the ON-OFF control of heater 68, no matter any reason of the pressure in boiler jar 60 takes place when unusual, safety valve 68 is all opened automatically.
Magnetic valve is according to the indicator cock of control module output, during steam clean, open the magnetic valve 65 of the pipeline of emitting the steam in the boiler jar, when hot water cleans, open the magnetic valve 65 of the pipeline of emitting the hot water in the boiler jar, rinse when washing, open from rinsing the magnetic valve 65 of scouring water supplying tank by the pipeline of high-temperature high pressure pump supply nozzle.
Boiler controller 17, when the water level that detects boiler jar 60 when being the next, high-temperature high pressure pump 66 sucks with supplying tank 67 from cleaning fluid (super electrolysis buck), and it is upper water level that continuous water supply detects in boiler jar 60.Heater is before water level reaches meta in the boiler jar, in order to prevent dry combustion method, be made as OFF, when to detect meta water level simultaneous temperature be below the design temperature or jar internal pressure for setting when following, heating reaches setting value up to temperature or pressure,, in the pressure limit of setting and temperature to the heating carrying out of the water boiler jar 60 in ON-OFF, the interior temperature and pressure of control boiler jar.When the input abnormal signal, cut off heater and stop pump, making magnetic valve all is the OFF state.
Control module (controller) is controlled with the degree of using CPU at central control part.The routine processes content is shape store processing, cleaning treatment, maintenance processing, processing abends.
There are automatic cleaning and maintenance to handle in the cleaning treatment.Automatically cleaning is that indication is set steam, hot water, rinsed and wash in dewatering with air purge each, and ceiling and coil pipe blade are handled automatically according to setting.(can set scavenging period) according to fouling condition.Maintenance is handled as maintenance usefulness, and other is handled to carry out each separately, is to handle with the action of confirming as maintenance.
The processing that abends is when any abnormal operation takes place, and whole actions are all stopped.With the device and the usefulness of the invention described above, use manual washer jet as shown in Figure 7, can operate steam, hot water and rinse and wash.
The handle 55 that manual washer jet unit shown in Figure 7 changes heatproof sleeve on the joint 53, ball valve 54, volume of most advanced and sophisticated nozzle angle by fluid injector 52, freely be connected the hose coupling 56 of supplying with steam, hot water from the boiler unit, rinsing the flexible pipe of wash water and constitute.Use can clean home-use wall hanging air conditioner, hanging-on-window type air conditioner, small air-conditioning system etc. manual cleaning unit, can effectively utilize as general cleaning machine.
Below, the using method as the device of the present invention of above-mentioned structure is described.
At first, the wind speed of air conditioner before measure cleaning, the panel of the air conditioner 1 of dismantling, drain pan, each signal cable, pressure fan, device of the present invention be lifted on this air conditioner 1 and heat exchanger 2 under, become state shown in Figure 1.On air-conditioning hood (funnel) 3, hang the ethene diaphragm, prevent that steam and hot water from entering in the ceiling.
Then, draining bucker (funnel) 3 is cleaned in lifting, and the bucker lower end is connected with scupper hose 9 by scupper hose joint 8, and the other end of scupper hose 9 connects displacement can, displacement can 14 inner product reservation or revocation liquid.
Flexible pipe 5 is carried at the steam and the hot water that are connected in to boiler unit 11 generations of water pot (hot water usefulness, rinse water are used) 67.Supplying with flexible pipe 7 carries by the air of compression with air element 13 compressions.Supply flexible pipe 7, this flexible pipe 5 are connected hot water hose 5, signal cable 6, the air supply flexible pipe 7 that is connected in cleaning device head 4 with signal cable 18 with head.By lifting head installation washing apparatus of air conditioner, can begin to clean.
At first, connect the step switch of boiler unit 11, prepare steam and hot water, simultaneously, connect air compressor switch and begin storing compressed air.
Confirm after the above-mentioned action, connect the control module firing switch, so 360 ° of head counter-rotatings are measured and the shape of the storage air conditioner heat exchanger air conditioner shape difference of factory (different air conditioner) by horizontal range detector 27, vertical range detector 29.Simultaneously, shoot with video-corder the dirt of the heat exchanger of air conditioner, when confirming, record a video with hard disk video camera 16 with camera monitor 10 by observing video camera 24.
When the shape of heat exchanger is transfused to computer, washer jet will be all the time distance be cleaned the about 5cm of body (4～6cm) the limits limit rotation jet cleaning liquid that stretching.
When cleaning, according to the fouling condition of air conditioner heat exchanger, manually set and clean content and scavenging period, clean according to setting automatically.
Uperize, steaming wets is cleaned body and peels off dirt, rinses after cleaning with hot water again and washes.Like this, can enough a spot of washings remove dirt only.Then, automatically switch into compressed air,, dispel the water droplet of air conditioner inside by purging compressed air, can be dry at short notice.Confirm dried state with the observation video camera, finish to clean.Like this, by steam, hot water clean can remove go mouldy, bacterium etc.
Clean after the end, remove anti-hyponome, cut off control module, pull down the head lifting elements, restore the annex (fan, drain pan, connection signal cable) of air conditioner, carry out test running, clean the measuring wind speed after the end, compare affirmation, finish cleaning operation with state before cleaning.
Claims (20)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004245531A JP2006064227A (en) | 2004-08-25 | 2004-08-25 | Washing device for ceiling embedded type air conditioner heat exchanger |
| JP2004245531 | 2004-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1740730A true CN1740730A (en) | 2006-03-01 |
Family
ID=36093191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510097747 CN1740730A (en) | 2004-08-25 | 2005-08-24 | Cleaning device for embedded roof air conditioner heat exchanger |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2006064227A (en) |
| CN (1) | CN1740730A (en) |
| TW (1) | TW200607978A (en) |
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| CN102265111A (en) * | 2009-03-16 | 2011-11-30 | 管科技国际有限公司 | Spray lance for cleaning shell side of heat exchanger core |
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- 2004-08-25 JP JP2004245531A patent/JP2006064227A/en active Pending
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2005
- 2005-08-24 CN CN 200510097747 patent/CN1740730A/en not_active Application Discontinuation
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| CN102265111A (en) * | 2009-03-16 | 2011-11-30 | 管科技国际有限公司 | Spray lance for cleaning shell side of heat exchanger core |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW200607978A (en) | 2006-03-01 |
| JP2006064227A (en) | 2006-03-09 |
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