CN1225037A - Heat exchange device and method of catalytically treating the atmosphere - Google Patents
Heat exchange device and method of catalytically treating the atmosphere Download PDFInfo
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- CN1225037A CN1225037A CN 97196326 CN97196326A CN1225037A CN 1225037 A CN1225037 A CN 1225037A CN 97196326 CN97196326 CN 97196326 CN 97196326 A CN97196326 A CN 97196326A CN 1225037 A CN1225037 A CN 1225037A
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Abstract
Method of catalytically activating the surface of a heat exchange device while retaining the heat exchange properties of the device and heat exchange devices obtained thereby.
Description
The present invention relates to a kind of low temperature and remove the method for atmosphere, or rather, relate to heat exchanger, such as the coating of the outer surface of the radiator of motor vehicle, it can the catalyzed conversion pollutant be innoxious compound, and not to the adverse effect of heat exchanger.
To the relevant summary explanation method commonly used of polluting the document of control is to remove the waste gas that enters environment by reacting.If the amount of one or another kind of pollutant that detects or discharging is too big, just should pay close attention to the source of this pollutant.For most waste gas, before entering atmosphere, it handles to reduce pollutant.
Processing is discharged to an atmosphere in the affined space to remove the existing report of wherein undesirable component.Yet, still do not have the pollutant of how much making great efforts to handle in the environment Already in; Environment has been left to it self cleaning system.
There is document to disclose the method for positive environment purification.The patent No. a kind of air cleaning unit that has been 3,738,088 U.S. Patent Publication, its adopts delivery vehicle as mobile purifier, is used for removing the pollutant of surrounding air.Existing a large amount of accessory can be used with delivery vehicle, purifying ambient air when travelling in environment with this delivery vehicle of box lunch.Particularly, there is a kind of pipeline that is disclosed to be used to control air velocity and makes air directly by various filters.This filter can comprise filter and electron precipitation device.The after-filter of catalysis can be used for handling non-particulate or aerosol contaminants, such as carbon monoxide, unburned hydrocarbon compound, nitrogen oxide or sulfur oxide or the like.
The patent No. is to disclose another kind of method in 5,147,429 the United States Patent (USP).Promptly mobile aerial drift air cleaning station.This patent is a feature with a dirigible of collecting air especially.This dirigible comprises many dissimilar air cleaning units.Disclosed this air cleaning unit comprises hydrofilter, filter and whirlwind aerosolater.
The difficulty of using disclosed device to purify air is that they need new extra equipment.Also need pipeline and comprise the filter of catalytic filter even the patent No. is 3,738,088 the disclosed improved delivery vehicle of United States Patent (USP).
As to handling the response of the relevant difficulty of big device of air, the applicant is the U.S. Patent Application Serial 08/410 that submit to March 24 nineteen ninety-five, 445, the U.S. Patent Application Serial of submitting on January 19th, 1,996 08/589,182 and handle device in the method for atmosphere in disclosing the mobile delivery vehicle of relevant employing in the U.S. Patent Application Serial 08/589,030 (each is all as list of references of the present invention) that had submit in 9 in January, 1996.In a preferred embodiment, scribble catalysis or adsorbing composition on the part of cooling system (as radiator).In addition, a fan of installing in the cooling system can extract or force air to enter and the contacted mode of operation of radiator.With the pollutant that comprises in the air,, be converted into uncontamination thing (as oxygen and carbon dioxide) then as ozone and/or carbon monoxide.
The applicant also has a patent application of examining, promptly in the U.S. Patent Application Serial 08/412 of submission on March 24 nineteen ninety-five, 525 (incorporating this paper as a reference into), this patent application discloses the apparatus and method with catalyst composition active process atmosphere, be used for fixing target such as static automobile, billboard, air conditioner, or the like.
Catalyst composition is used for the problem of a heat exchanger as the surface of vehicle radiator can produce, and promptly the heat exchange performance to device has adverse effect.Such as, catalyst composition may play a part heat guard, thereby has lowered the ability of radiator dissipate heat.
So under the condition of the heat exchange performance that does not influence device, adopting heat exchanger device to handle air is an important progress with the minimizing pollution technology of removing pollutant.If can address this problem in a kind of effective and low-cost mode of sending out to be the further progress of this technology.
The present invention relates generally to that a kind of atmosphere of handling is to remove the wherein method of pollutant.Radiator to a heat-exchange device such as automobile is handled, so that its outer surface impels the pollutant in the atmosphere to be converted into innoxious compound in the mode of catalysis, does not influence the heat exchange performance of device simultaneously again.The present invention also comprises and can the method remove the heat-exchange device that pollutes.
Term " atmosphere " is defined as earth-circling air herein, and " surrounding air " refers to and extract or force it to arrive the atmosphere of heat-exchange device outer surface.It also comprises the accidental heated or air by the firing equipment heating.
According to the present invention, the surface of heat-exchange device must have a kind of pollutant that can impel effectively and be catalytically conveted to the material of innoxious compound.So the surface of heat-exchange device must be with being converted into innoxious compound such as pollutants such as hydrocarbon compound, carbon monoxide and ozone, as oxygen, carbon dioxide and water vapour.
In general, the present invention relates to the catalytic treatment atmosphere pollutant is converted into the method for innoxious compound, this method comprises the outer surface of handling heat-exchange device so that described surface can the catalyzed conversion pollutant.In one aspect of the invention, the outer surface of heat-exchange device is to be made by the material of catalytic activity, perhaps is equipped with such material, such as, base metal catalysts, noble metal catalyst or their combination.Terminology used here " base metal catalysts " and " noble metal catalyst " will comprise base metal and noble metal itself and the compound that contains these base metals and noble metal, as the salt of noble metal, the salt and the oxide of base metal.Then the surface is handled to increase its surface area.Surface treatment comprises makes heat-exchange device contact to form the surface of " rugged " with acid, and it has very large surface area, can make that desirable catalytic reaction is easier carries out.Randomly, also can apply a kind of catalyst composition, and make treatment surface contain other catalytic metal by a part in treatment surface.
In another preferred embodiment of the present invention, outer surface applies a kind of catalyst composition.Yet in order to prevent to lower the heat exchange performance of heat-exchange device, catalyst composition should not be coated with the whole outer surface of full heat-exchange device, and/or only is coated on the surface of not participating in the heat exchange activity directly of heat-exchange device.
Heat-exchange device can be any with have the device of fluid at differing temperatures (gas and liquid) operating of contacts, so just can carry out heat exchange by two kinds of fluids approaching.Only be illustrative purposes, use automobile radiators herein as typical example.Should be appreciated that the heat-exchange device in devices such as air conditioner also is fit to use in the present invention.
By natural airflow or by using exhaust equipment that surrounding air is drawn on the heat-exchange device, such as using fan or similar devices to extract or forcing surrounding air to enter and contacted mode of operation with heat-exchange device of catalytic surface.As an example, fan can place a tunnel, or as the part of air-conditioning system, or as previously mentioned, preferably as the part of automobile conventional cooling system.This fan is generally by power drives, as battery, be preferably the 12 volts of batteries of routine that use in the equipment such as automobile, solar panels.According to a further aspect in the invention; when catalyst composition is coated on the part on surface of the heat exchange surface of heat-exchange device and/or non-exchanged heat; the protective coating of a porous need be provided, contaminated and too early aging to prevent catalyst composition by causing such as salt, dust, wet goods pollutant.The accompanying drawing summary
Following accompanying drawing shows embodiments of the invention, the wherein identical identical parts of reference number representation, but the present invention is not confined to the application's the included content of claims.
Fig. 1 is the side schematic view of a truck, and it shows grille, the cool condenser of air conditioner, radiator, fan and an engine;
Fig. 2 is the stereogram of an automobile radiators;
Fig. 3 is the sectional view of the amplification of a radiator;
Fig. 4 is the part front view of a series of wrinkle plates of a radiator, is coated with on the wrinkle plate according to one embodiment of present invention and has applied catalyst composition;
Fig. 5 is the part front view of a series of wrinkle plates of a radiator, is coated with on the wrinkle plate according to another embodiment of the invention and has applied catalyst composition;
Fig. 6 is the rearview of radiator, and demonstration is coated with the radiator rear surface that applies catalyst composition according to the present invention;
Fig. 7 is the part stereogram with radiator of blade, has applied a kind of catalyst composition on blade according to the present invention; And
Fig. 8 is the part front view of the wrinkle plate of a radiator, and the surface of wrinkle plate has carried out handling to increase its surface area.
The present invention relates to handle the method on heat-exchange device surface, thereby pollutant contained in the surrounding air easily is converted into innoxious compound.If the surface itself is to be made by the metal of catalytic activity, such metallics perhaps is equipped with, if perhaps a kind of catalyst composition is coated in the surface of heat exchanger, the surface of heat-exchange device just can have catalytic performance.When a kind of catalyst composition was coated to the outer surface of heat exchanger, it only covered part surface and/or is coated in non-heat exchange surface, can prevent to lower the heat exchange performance of heat-exchange device like this.The present invention is particularly suitable for a hydrocarbon compound, ozone and carbon monoxide and is converted into innoxious compound, such as, oxygen, carbon dioxide and water vapour.
The atmosphere contact surface is the outer surface of heat-exchange device such as radiator.Wherein there is any heat-exchange device of ambient air all can handle according to the present invention.It can the catalyzed conversion pollutant be innoxious compound that the present invention is particularly importantly made heat-exchange device institute external surface coating, and the heat exchange performance to device does not have adverse effect simultaneously.
According to an aspect of the present invention, the outer surface part of heat-exchange device (as radiator) is coated with and applies catalyst composition.Particularly, catalyst composition will cover the about 1% to 99% of outer surface, is preferably about 25% to 75%.For required part coating is provided, not applying part can be with adhesive tape or with comprising that the coating as materials such as special fluorine covers.Useful and preferred catalyst composition comprises at least a base metal catalysts and/or at least a noble metal catalyst.The amount of base metal and the amount of noble metal can change, and can determine by contained pollutant in the atmosphere.In general, the amount of base metal catalysts accounts for the about 0.05% to 5.0% of catalyst composition gross weight, is preferably about 0.1% to 2.0%.The amount of noble metal can reach 20% of catalyst composition gross weight, is preferably about 0.5% to 10%.
The base metal that can be used for catalyst composition comprises the base metal that all can be converted into ozone oxygen effectively and/or carbon monoxide is converted into carbon dioxide.Preferred base metal comprises iron, copper, chromium, zinc, manganese and contains the compound of these metals and their combination.Base metal generally uses with its oxide form.
Noble metal is to select from the metal of the catalyst that is usually used in handling motor exhaust.Preferred noble metal is platinum, palladium and their mixture.Platinum is most preferred noble metal.In a kind of preferred catalyst composition, noble metal is the surface that is dispersed in base metal catalysts in principle.This means that at least 50% noble metal is on the surface of base metal catalysts or the surface of approaching base metal catalysts, so just can guarantee that the pollutant in the surrounding air is converted into harmless accessory substance fast.
Also to provide the suitable very carrier material of high surface area that has for catalyst composition.Preferred carrier material is a refractory oxide, such as the oxide of selecting from following one group of material: ceria, aluminium oxide, titanium dioxide, silica, zirconia and their mixture, wherein aluminium oxide is most preferred refractory oxide carrier.Refractory oxide preferably has big surface area, so that hold maximum catalyst compositions in given unit are.Term " big surface area " generally refers to carrier when relevant with refractory oxide surface area is at least 100m
2/ g, preferred range is about 100 to 300m
2/ g.
As previously mentioned, the amount of the amount of base metal catalysts and noble metal catalyst can change in a wide scope.In preferred catalyst composition, the weight ratio of noble metal catalyst and base metal catalysts is extremely little to be 1: 1.The weight ratio of preferred noble metal catalyst and base metal catalysts is in about 8: 1 to 12: 1 scope.
The combination of base metal and noble metal in its surface just provides a kind of catalyst composition, and it can be operated at low temperatures, so that carbon monoxide and ozone are converted into harmless accessory substance effectively.
Catalyst composition can be coated on spreader surface by dipping and/or spray technique.According to the present invention, catalyst composition is coated on the heat exchange surface of radiator, but is not coated with completely whole surface, is preferably to be coated on 25% to 75% the spreader surface.
As previously mentioned, the atmosphere contact surface zone that is not coated with catalyst composition can cover with a kind of material, and this material can prevent that catalyst composition is at this area deposition.Such material comprises normal tape (as the screen membrane adhesive tape) and coating, as comprises material or other material that stops catalyst composition to adhere to of teflon.
After cladding material is coated to the atmosphere contact surface, catalyst composition is coated to the zone that will be coated with, any unrestrained can remove to the catalyst composition on uncoated surface is such as by throwing off cladding material.
As long as catalyst composition is not coated with the whole heat exchange surface of full heat-exchange device, the application pattern of catalyst composition is actually hard-core.Such as, catalyst composition can be painted the spaced rows that is distributed on the heat-exchange device length.The another kind of selection is the part that catalyst composition is coated to a relative side of heat-exchange device.
In another aspect of this invention, catalyst composition can be coated on the non-heat exchange surface of heat-exchange device." non-heat exchange surface " refers to these surfaces and do not participate in heat exchange between the relevant fluid.In the time of on being coated to described surface, obviously can interference not arranged to the heat exchange performance of this device.So, when needing, can be coated with completely all on-catalytic surfaces with catalyst composition.The example on the on-catalytic surface of heat exchange comprises the back side or back and extension (as blade etc.) of heat-exchange device, and these surfaces do not contact with heat-exchange fluid by wherein.
The heat exchange surface of heat-exchange device can have catalytic performance, if should be by the catalytic active substance manufacturing or have catalytic active substance (combining as base metal self or with small amount of precious metals) in surface itself.In order to provide effective catalytic surface, the general surface area of wishing to increase heat-exchange device.This can be by realizing with a kind of surface of acid treatment heat-exchange device, thereby the outer surface of " rugged " is provided.The heat-exchange device of handling like this can provide an effective system that pollutant is catalytically conveted to innoxious compound.Because catalyst composition is not coated on the heat exchange surface in this embodiment, so can carry out acid treatment to whole surface or its part of heat-exchange device.
Combine by coating base metal self on spreader surface or with noble metal, the on-catalytic surface of radiator can have catalytic performance.Can and the metal that gasifies be deposited on spreader surface by gasified metal and come the coating catalyst metal.
Yet, should be appreciated that and wish in some cases catalyst composition is added to the surface of roughening to improve conversion ratio.Can adopt foregoing similar catalyst composition.In this case, for preventing to lower heat exchange performance, the heat exchange surface of cover heating switch fully necessarily.
In the operation of the present invention, employing natural airflow or air-extractor extract or force air to pass through catalytic surface.For the land automobile, this heat exchange surface is preferably the surface of radiator.The also available similar method such as other heat-exchange device such as air-conditioning condenser that but should be appreciated that is handled.
In most preferred embodiment of the present invention, the atmosphere contact surface is the surface of a radiator.By according to processing spreader surface described herein, just be easy to from atmosphere, remove pollutant, can not lower the heat exchange performance of radiator simultaneously.
By 1-8 with reference to the accompanying drawings, it will be appreciated by those skilled in the art that the present invention.The present invention can be applicable to the heat-exchange device of any kind, and can be applicable to heat exchange surface and non-heat exchange surface.According to the present invention, particularly importantly kept the heat exchange characteristics of heat-exchange device.When surrounding air touched the catalytic surface of heat-exchange device, hydrocarbon compound, carbon monoxide and/or ozone produced harmless accessory substance through catalytic reaction, as oxygen, carbon dioxide and water vapour.
It will be understood to those of skill in the art that when heat exchanger and delivery vehicle interrelate, can adopt any suitable delivery vehicle.Delivery vehicle comprises car, truck, train, steamer, warship, aircraft, dirigible, balloon, or the like.Preferably in automobile, the atmosphere contact surface is to be positioned at the surface of automobile front near the cooling system fan.Useful contact surface comprises the outer surface of parts such as radiator, air-conditioning condenser, and these all are positioned at and are fixed on the preceding case of automobile.
Figure 1 shows that the schematic diagram of the truck 10 that comprises one group of automobile component, wherein radiator or air-conditioning condenser comprise the atmosphere contact surface.This truck comprises a grille 12, air conditioner condenser 14, a radiator 16 and a radiator fan 18.Be appreciated that in truck and can find other automobile component.
Referring to Fig. 1 and Fig. 2, preferred big contact surface comprises the front surface 17 and the side surface 19 of the front surface 13 of air-conditioning condenser 14 and side surface 15, radiator 16.These surfaces all are arranged in the preceding case 24 of this truck.Below their general all truck caps between truck front 26 and engine 28.Before air-conditioning condenser 14 and radiator 16 can directly or indirectly be fixed on the case 24 or should before on the support (not shown) in case.
Fig. 2 is the schematic diagram of a radiator-air-conditioning condenser assembly.This automobile comprises a preceding case 30.The front end 32 of automobile has the grille 12 that is fixed on preceding case 30 fronts.Case 30 before air-conditioning condenser 14, a radiator 16 and a radiator fan 18 are positioned at.
The surface of air-conditioning condenser 14 and radiator 16 can be handled according to the present invention so that a catalytic surface to be provided, and the heat exchange performance to this device does not have adverse effect simultaneously.Most preferred atmosphere contact surface is the outer surface of radiator 16.A typical radiator has front surface and rear surface, separates with flat tube therebetween, and has one group of radiator wrinkle plate.More particularly referring to Fig. 3, show a radiator 18 here, it comprise be used for that first kind of fluid flow separate pipe 40, have a series of wrinkle plates 42 to determine 44, the second kinds of fluids of stream transversely flowing of second kind of fluid therebetween at first kind of fluid.First kind of fluid as anti-icing fluid, supplied with pipe 40 by a liquid source (not shown) by inlet 46.This anti-icing fluid 46 enters radiator 18 by entering the mouth under low relatively temperature, finally leave this radiator by exporting 48.Second kind of fluid as air, by stream 44, and set up heat exchange relationship with first kind of fluid by pipe 40 herein.
According to the present invention, can handle so that a catalytic surface to be provided the surface of the wrinkle plate 42 of radiator 18, this does not disturb the heat exchange performance of radiator.In one embodiment of the invention, catalyst composition is coated on the wrinkle plate 42 with the form of spaced rows.Referring to Fig. 4, show one embodiment of the invention here especially, wherein wrinkle plate 42 is coated with at interval and applies a kind of catalyst composition, is used for removing pollutant from atmosphere.Show especially that as Fig. 4 surperficial 42a, 42c, 42e, 42g and 42I are coated with and apply catalyst composition, and 42b, 42d, 42f, 42h and 42j are not coated with.Therefore, radiator 18 has possessed the catalytic surface that pollutant can be converted into innoxious compound, can finish hot-swap feature with effective and efficient manner by the surface that is not coated with that exposes again simultaneously.
In another embodiment of the invention, catalyst ink is coated to all wrinkle surfaces, but only is coated on the part.Referring to Fig. 5, be coated with catalyst composition on the surperficial part of each plate 42, thereby a catalytic surface 42j and an on-catalytic surface 42k are provided.In this embodiment, each wrinkle plate all provides one pollutant is converted into the catalytic surface of innoxious compound, can make the radiator finish its hot-swap feature by all wrinkle plates again simultaneously.
According to the present invention, the non-heat exchange surface of radiator or other heat-exchange device can be coated with and apply catalyst composition, and does not disturb the heat exchange performance of this device.Particularly, the non-heat exchange surface of radiator can be coated with and apply catalyst composition, and/or the extension of non-heat exchange can be increased on the heat-exchange device, and is coated with and applies catalyst composition.
Referring to Fig. 6, show a radiator that comprises preceding case 50 and wrinkle plate 42 here, wherein the rear surface 52 of wrinkle plate 42 has applied catalyst composition.Rear surface 52 is non-heat exchange surfaces, has been cooled liquid cooling but because enter the surrounding air that contacts with the rear surface, so in the rear end of this radiator heat exchange does not take place.
In an alternative embodiment of the invention as shown in Figure 7, radiator is equipped with at least one, is preferably one group is the projection 60 (such as blade) of non-heat exchange surface.Blade 60 has applied catalyst composition with the method (as by spraying) of routine.When contacting with surrounding air, the surface of blade is heated by the heat conduction of heat exchange surface, and it can be converted into innoxious compound with containing pollutant in the air.
In another aspect of this invention, the coating catalyst composition can be gone up and not be used in this surface through handling so that catalytic surface to be provided in the surface of radiator.The radiator that can adopt metal to make in this embodiment, it can be converted into innoxious compound with hydrocarbon compound, carbon monoxide and/or ozone.For a suitable catalytic surface is provided, must increase the surface area of radiator.This can be finished by any method of roughening spreader surface.Referring to Fig. 8, the method for optimizing of handling the radiator outer surface be make this surface and a kind of can with the Metal Contact of acid reaction, to form a roughened surface.The roughening on surface provides a series of salient point that separates or pit 70, and this has greatly increased the surface area of radiator, thereby the catalytic site of sufficient amount is provided for the pollutant conversion reaction.
The acid that can be used for handling metal comprises inorganic acid, example hydrochloric acid, sulfuric acid, phosphoric acid etc.Also can use organic acid, as acidic acid, formic acid etc.
Acid can be coated on the radiator by methods such as dipping, spraying, brushings.The amount of used acid and the time of processing are in the normal ranges of the industry, and the heat exchange performance that is enough to provide the obvious increase of radiator surface area and don't damages radiator.
In above-mentioned each embodiment, can provide a porous protective finish to catalytic surface.This protective finish comprises a kind of in temperature still stable protective substance during up to 100 ℃, and ability is to chemical substance, salt, dust and other pollutant of the presumable adverse effect of catalyst composition.Known some plastic material can satisfy this requirement, comprise polyethylene, polypropylene, polytetrafluoroethylene (PTFE) (as teflon), or the like.Polytetrafluoroethylene (PTFE) is the preferred material of this protective coating.
Protective coating can form by dipping and spray technique.Preferable methods is to use not halogen-containing aerosol spray.
Claims (30)
1. a catalytic treatment atmosphere is to be converted into pollutant the method for innoxious compound, make the described surface can the described pollutant of catalyzed conversion thereby this method comprises the outer surface of heat-exchange device handled, the heat exchange performance to heat-exchange device have adverse effect simultaneously.
2. the process of claim 1 wherein that described outer surface comprises at least a catalytically-active metals, described method comprises the surface area that increases the heat-exchange device outer surface.
3. the method for claim 2 comprises the outer surface with the acid treatment heat-exchange device, and the consumption of acid is enough to the described outer surface of roughening at least a portion.
4. the method for claim 2, the used metal of its outer surface is selected from base metal, noble metal and their combination.
5. the method for claim 3, wherein used acid is selected from hydrochloric acid, sulfuric acid, phosphoric acid and organic acid.
6. the method for claim 3 further is included in deposition of catalytic metals on the outer surface that at least a portion of heat-exchange device handled.
7. the method for claim 6, wherein the step in deposition of catalytic metals on the heat-exchange device comprises the described metal of deposition on gasified metal and the outer surface at heat-exchange device.
8. the method for claim 1 comprises that a kind of catalyst composition of coating is to a part of outer surface of heat-exchange device.
9. the method for claim 8 comprises that the coating catalyst composition is to the outer surface of the 1%-99% of heat-exchange device.
10. the method for claim 9 comprises that the coating catalyst composition is to the outer surface of the 25%-75% of heat-exchange device.
11. the method for claim 8 comprises a kind of catalyst composition coating of coating to a part of outer surface of heat-exchange device, described catalyst composition coating comprises and is selected from base metal, noble metal, their compound, and the catalyst component of combination.
12. the method for claim 8, wherein catalyst composition comprises and accounts for about 0.05% to 5.0% the base metal catalysts of catalyst composition gross weight and up to about 20% noble metal catalyst.
13. the method for claim 11, wherein at least 50% noble metal catalyst is on the surface of base metal catalysts, or near the surface of base metal catalysts.
14. the method for claim 8 comprises catalyst composition is coated to heat-exchange device in the mode of spaced rows.
15. the method for claim 8, wherein heat-exchange device comprises one group of wrinkle plate, and described method comprises the part of coating catalyst composition to each wrinkle plate.
16. the method for claim 12, wherein the percentage by weight ratio of noble metal catalyst and base metal catalysts was at least 1: 1.
17. the process of claim 1 wherein that heat-exchange device comprises a non-heat exchange outer surface, described method comprises with catalyst composition handles the non-heat exchange surface of at least a portion.
18. the method for claim 1 further comprises the outer surface of coating protective coating to heat-exchange device.
19. the method for claim 18, wherein protective coating comprises at least a in temperature still stable and anti-protective substance that treatment step is had the pollutant of adverse effect during up to 100 ℃.
20. the method for claim 19, wherein protective substance is selected from polyethylene, polypropylene and polytetrafluoroethylene (PTFE).
21. the method for claim 19, comprise with protective substance as aerosol spray to the outer surface of heat-exchange device.
22. heat-exchange device, comprise an outer surface, make described surface the pollutant in the surrounding air can be catalytically conveted to innoxious compound thereby at least a portion of this outer surface is treated, the heat exchange performance to heat-exchange device does not have adverse effect simultaneously.
23. the heat-exchange device of claim 22 comprises the outer surface of an acid treatment.
24. the heat-exchange device of claim 22 comprises a heat exchange outer surface, the part of described heat exchange outer surface is coated with and applies a kind of catalyst composition.
25. the heat-exchange device of claim 22 comprises a non-heat exchange outer surface, at least a portion of described non-heat exchange outer surface applies a kind of catalyst composition.
26. the heat-exchange device of claim 24, wherein the heat exchange outer surface applies the catalyst composition of one group of spaced rows.
27. the heat-exchange device of claim 24 comprises one group of wrinkle plate, described catalyst composition is coated on the part of each wrinkle plate.
28. the heat-exchange device of claim 22 further comprises a protective coating on the outer surface.
29. the heat-exchange device of claim 28, wherein protective coating comprises at least a in temperature still stable and anti-protective substance that treatment step is had the pollutant of adverse effect during up to 100 ℃.
30. the heat-exchange device of claim 29, wherein protective substance is selected from polyethylene, polypropylene and polytetrafluoroethylene (PTFE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97196326 CN1225037A (en) | 1996-07-12 | 1997-05-06 | Heat exchange device and method of catalytically treating the atmosphere |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/695,687 | 1996-07-12 | ||
| CN 97196326 CN1225037A (en) | 1996-07-12 | 1997-05-06 | Heat exchange device and method of catalytically treating the atmosphere |
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| Publication Number | Publication Date |
|---|---|
| CN1225037A true CN1225037A (en) | 1999-08-04 |
Family
ID=5179698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97196326 Pending CN1225037A (en) | 1996-07-12 | 1997-05-06 | Heat exchange device and method of catalytically treating the atmosphere |
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| Country | Link |
|---|---|
| CN (1) | CN1225037A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496985B (en) * | 2009-01-31 | 2012-05-23 | 杨峥雄 | Environment friendly energy-saving air-discharging treating device and method |
| CN103906638A (en) * | 2011-07-28 | 2014-07-02 | 丰田自动车株式会社 | Vehicle atmosphere purifying apparatus |
| CN104955179A (en) * | 2015-06-10 | 2015-09-30 | 广东美的制冷设备有限公司 | PTC (positive temperature coefficient) heater and electric appliance comprising same |
-
1997
- 1997-05-06 CN CN 97196326 patent/CN1225037A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496985B (en) * | 2009-01-31 | 2012-05-23 | 杨峥雄 | Environment friendly energy-saving air-discharging treating device and method |
| CN103906638A (en) * | 2011-07-28 | 2014-07-02 | 丰田自动车株式会社 | Vehicle atmosphere purifying apparatus |
| CN103906638B (en) * | 2011-07-28 | 2016-03-23 | 丰田自动车株式会社 | Vehicle atmospheric cleaning device |
| CN104955179A (en) * | 2015-06-10 | 2015-09-30 | 广东美的制冷设备有限公司 | PTC (positive temperature coefficient) heater and electric appliance comprising same |
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