JP2005308284A - Temperature control equipment and heat exchanger deodorizing/sterilizing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide temperature control equipment for efficiently decomposing/sterilizing odor components and bacteria deposited on the surface of a heat exchanger, and to provide a heat exchanger deodorizing/sterilizing method. <P>SOLUTION: The temperature equipment functions to decompose/sterilize odor components and bacteria deposited on the surface of the heat exchanger 10. It comprises a supply means 50 for creating or storing chemicals which generates active oxygen and for supplying the chemicals to the surface of the heat exchanger 10. The chemicals to be used are hydrogen peroxide. The hydrogen peroxide is decomposed by a transition metal or oxidation catalyst 14b to form OH (hydroxy radicals). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a temperature control device having a deodorizing function for odorous substances adhering to the surfaces of fins and tubes of a heat exchanger and a sterilizing function for harmful microorganisms, and a method for deodorizing and sterilizing a heat exchanger. It is suitable for use in an air conditioner.

  2. Description of the Related Art Conventionally, as a technique for deodorizing and sterilizing air-conditioning air, one that purifies air blown indoors by generating active oxygen in the middle of an air-conditioning duct is known.

As this active oxygen, for example, Patent Document 1 uses a photocatalyst and ozone, and Patent Document 2 uses positive ions and negative ions.
Japanese Patent Laid-Open No. 2003-310731 JP 2003-329288 A

  However, odor components and bacteria usually adhere to and accumulate on the surface of the heat exchanger (evaporator) installed in the air conditioning duct. Basically, odor components to this heat exchanger It is considered important to suppress the adhesion of bacteria and bacteria, but it is difficult to sufficiently cope with the photocatalyst, ozone, ions and the like.

  That is, in the photocatalyst, it is necessary to irradiate the heat exchanger with ultraviolet rays having a wavelength region of 400 nm or less. However, it is difficult to uniformly irradiate ultraviolet rays with a lamp onto a heat exchange part made of fins or tubes and having a complicated shape, and the irradiation intensity may be lowered depending on the place.

In addition, ozone and ions are weaker in oxidizing power than radical species generated by plasma, cannot be completely oxidized, and generate odors different from odor components that should be decomposed originally. For example, when acetaldehyde is oxidized with O ₃ , O ₂ ^— or the like, oxidative decomposition stops when acetic acid is generated. Acetic acid produced at this time is also an odor component and cannot be brominated.

  Furthermore, ozone and ions are difficult to reach the entire region of the heat exchange section having a complicated shape, and are not sufficiently purified. Alternatively, condensed water often adheres to the surface of the heat exchange part, and if the attached odor component is wrapped in a bale of moisture, it disappears by the time the ozone or ions reach the odor component present in it. Probability is high. Alternatively, it may be considered to disappear by reacting with water molecules.

  In view of the above problems, an object of the present invention is to provide a temperature control device and a heat exchanger deodorization / sterilization method that can more efficiently decompose and disinfect odor components and bacteria adhering to the surface of the heat exchanger.

  In order to achieve the above object, the present invention employs the following technical means.

  The invention according to claim 1 is a temperature control device having a function of decomposing and sterilizing odor components and bacteria adhering to the surface of the heat exchanger (10), and generating or storing a chemical that generates active oxygen. The supply means (50) for supplying the chemical solution to the surface of the heat exchanger (10) is provided.

  Thereby, since the active oxygen generated from the chemical solution is in direct contact with the odor components and bacteria attached to the surface of the heat exchanger (10), the odor components and bacteria can be efficiently decomposed and sterilized. And the odor which generate | occur | produces from a heat exchanger (10) can be suppressed.

  The invention according to claim 2 is characterized in that an inlet for injecting a chemical solution for generating active oxygen is provided from the outside of the heat exchanger (10) or the member (5) covering the heat exchanger (10).

  Thereby, a chemical | medical solution can be supplied to a heat exchanger (10) through an inlet, and similarly to the invention of Claim 1, the odor component, bacteria, etc. adhering to the surface of a heat exchanger (10) are decomposed | disassembled efficiently. Can be sterilized.

  In addition, as the invention according to claim 3, it is preferable to use hydrogen peroxide as the chemical solution. In other words, hydrogen peroxide produces OH (hydroxy radicals) that are more oxidative than ozone and ions, so odor components and bacteria are efficiently decomposed without leaving oxides generated during the oxidation process. It can be sterilized. Further, even if water such as condensed water adheres to the surface of the heat exchanger (10), since hydrogen peroxide dissolves in the water, it can directly contact the surface of the heat exchanger (10).

  Further, as in the invention described in claim 4, the supply means (50) can be easily handled by adopting an electrode structure composed of an anode and a cathode for generating hydrogen peroxide. Become.

  The invention according to claim 5 is characterized in that the transition metal or the oxidation catalyst (14b) is exposed on the surface of the heat exchanger (10).

As a result, the Fenton reaction (H ₂ O ₂ → OH + OH ⁻ ) and the Harbor Vice reaction (H ₂ O ₂ + e ⁻ → OH + OH ⁻ ) are caused on the surface of the heat exchanger (10), and the production of • OH is actively performed. Therefore, the ability to decompose and disinfect odor components and bacteria can be improved.

  As in the sixth aspect of the present invention, a transition metal or an oxidation catalyst (14b) is provided in the path through which the chemical solution is supplied from the supply means (50) to the surface of the heat exchanger (10). The same effects as those of the invention described in claim 5 can be obtained.

  And as invention of Claim 7, as a transition metal and an oxidation catalyst (14b), it is suitable using at least any one of platinum, copper, and iron.

  The invention according to claim 8 is characterized in that the superoxide generating material (14c) is exposed on the surface of the heat exchanger (10).

As a result, .OH is actively generated by the reaction of hydrogen peroxide and superoxide (H ₂ O ₂ + O ₂ ⁻ → 2 · OH + O ₂ ), so that the same effect as the invention according to claim 5 can be obtained. can get.

  Further, as in the ninth aspect of the invention, means for generating superoxide may be provided on the surface of the heat exchanger (10).

  And as for the means to generate | occur | produce a superoxide, the surface of a heat exchanger (10) can be formed as a part of electrode structure like invention of Claim 10.

  Furthermore, the superoxide generating material (14c) or the means for generating superoxide is a path through which the chemical solution is supplied from the supply means (50) to the surface of the heat exchanger (10) as in the invention described in claim 11. May be provided.

  In the invention described in claim 12, a mechanism for applying a negative potential to the surface of the heat exchanger (10) or the path through which the chemical solution is supplied from the supply means (50) to the surface of the heat exchanger (10). It is characterized by being provided.

As a result, the Harbor Vis reaction (H ₂ O ₂ + e ⁻ → OH + OH ⁻ ) is caused on the surface of the heat exchanger (10), and the production of • OH can be activated, so that odor components and bacteria are decomposed. , Sterilization ability can be improved.

  The negative potential at this time is 0 to −2.0 V vs. 5 as in the invention described in claim 13. Ag / AgCl level can be adequately dealt with, and no high voltage is applied unlike the means of generating ozone, etc., so no noise is generated in radios and stereos used indoors. There is no discomfort.

  In the present invention, as in the invention described in claim 14, the heat exchanger (10) is an evaporator that generates condensed water during operation, easily adheres to odor components, and easily propagates bacteria. It is suitable to apply to 10). Further, as in the invention described in claim 15, it is suitable to be applied to an automobile.

  Further, in the inventions of claims 14 and 15, as in the invention of claim 16, a hydrophilic film (contact angle of 40 ° or less) is formed on the lower layer of the transition metal or the oxidation catalyst (14b). 14a) may be formed, and this prevents the condensed water generated on the surface of the evaporator (10) from being blown into the room by the conditioned air.

  Moreover, if the supply means (50) is shared with the washer liquid storage section as in the invention described in claim 17, it is not necessary to provide a dedicated space or a new storage section, and it is inexpensive. Yes.

  The invention according to claim 18 relates to a method for deodorizing and sterilizing a heat exchanger for decomposing and sterilizing odor components and bacteria adhering to the surface of the heat exchanger (10). It is characterized in that active oxygen is generated from hydrogen peroxide by at least one of means for generating a transition metal, an oxidation catalyst (14b), and superoxide, which is applied to the surface of the vessel (10).

  Thereby, it can provide as a method which can decompose | disassemble and sterilize efficiently the odor component, bacteria, etc. of a heat exchanger (10).

  This deodorizing / sterilizing method is directed to an evaporator (10) as a heat exchanger (10) as in the invention described in claim 19, and for automobiles as in the invention described in claim 20. Suitable as a target.

  Further, as in the invention described in claim 21, it is preferable that the hydrogen peroxide storage part is shared with the washer liquid storage part.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description mentioned later.

(First embodiment)
Hereinafter, embodiments of the present invention will be described. FIG. 1 shows a temperature control device (temperature control device) 1 having a deodorizing / sterilizing function according to a first embodiment of the present invention, and this temperature control device 1 is applied to an air conditioner for an automobile.

  The temperature control apparatus 1 includes a case 5, an evaporator (corresponding to the heat exchanger in the present invention) 10, a heater 20, a hydrogen peroxide generation supply unit (corresponding to the supply unit in the present invention) 50 provided therein. The air suction device 30 is provided on the upstream side of the case 5, and the air outlet 40 is provided on the downstream side of the case 5.

  As shown in FIG. 2, the evaporator 10 is, for example, a stacked-type drone cup type heat exchanger, and is disposed in a refrigeration cycle so that a refrigerant such as alternative chlorofluorocarbon circulates therein.

  A piping joint 11 is disposed on the upper side in the vertical direction of the evaporator 10. In addition, a large number of tubes 13 are stacked, and the heat radiating fins 14 are interposed in the gaps between the outer surfaces of adjacent tubes 13 to form the heat exchanging portion 12. The heat exchange unit 12 exchanges heat between the refrigerant flowing through the refrigerant passage in the tube 13 and the air flowing outside the tube 13. The heat radiating fins 14 increase the heat transfer area on the air side and promote the heat exchange.

  Further, both end portions of the tube 13 in the longitudinal direction communicate with the tank 15, and the refrigerant circulates through each tube 13 and the tank 15 and flows into and out of the evaporator 10 through the pipe joint 11. Each of the above members is made of an aluminum alloy, for example, and is integrally brazed.

  The air introduced from the air suction device 30 into the case 5 is cooled by the evaporator 10 and warmed by the heater 20. Then, the cold air and the warm air are appropriately mixed and blown out from the air outlet 40 and sent to the vehicle interior.

  Above the evaporator 10, a hydrogen peroxide generation supply unit (hereinafter referred to as supply unit) 50 for generating hydrogen peroxide and supplying the hydrogen peroxide mainly to the heat exchange unit 12 is installed. . Here, the supply unit 50 is of a tank type and is configured to store the generated hydrogen peroxide to some extent. As a method for generating hydrogen peroxide, it can be used repeatedly or by electrolytic generation in order to increase the generation concentration, and the supply unit 50 has an electrode structure composed of an anode and a cathode. The electricity required for hydrogen peroxide generation is generated by power generation while the vehicle is running. In addition, the supply part 50 is good also as what uses a hydrogen peroxide generator and an active oxygen generator.

  Further, the supply unit 50 is not limited to the upper part of the evaporator 10 and may be installed at any position as long as hydrogen peroxide can be attached to the evaporator 10. In consideration of workability, maintainability, and installation space, the supply unit 50 may be used in combination with a vehicle washer fluid tank, or may be installed at the front of the passenger seat or in the rear space.

  The supply unit 50 is provided with a control device 60, and the control device 60 controls supply of hydrogen peroxide inside the heat exchange unit 12 of the evaporator 10. That is, the control device 60 includes a signal from a deodorizing switch (manual switch (not shown)) input by an occupant for deodorizing / sterilizing operation, an air conditioning information signal, and a plurality of wetting sensors 70 provided in the heat exchanging unit 12. Based on a signal from the above, hydrogen peroxide is dropped from the supply unit 50 to the heat exchange unit 12. In addition, the supply form of hydrogen peroxide is not limited to dropping, and for example, a form in which hydrogen peroxide is vaporized and attached to the heat exchange unit 12 may be used.

  The wetness sensor 70 is a sensor that detects that hydrogen peroxide has been supplied to the region by supplying hydrogen peroxide between its terminals. Here, the heat exchange unit 12 is divided into three parts in the vertical direction. It arrange | positions in the lower center of each divided part.

  As shown in FIG. 3, a hydrophilic film 14a having a contact angle of 40 ° or less is applied to the surface of the heat exchanging portion 12 (for example, the surface of the heat radiating fin 14). An oxidation catalyst 14b such as metal or a superoxide generating material 14c is applied by vapor deposition or the like. As the oxidation catalyst 14b, any one of iron, copper, platinum and the like is suitable, and as the superoxide generating material 14c, polyaniline which is a conductive polymer is suitable.

  The oxidation catalyst 14b and the superoxide generating material 14c do not need to cover the entire surface of the evaporator 10, and are applied partially here. Further, when the material of the evaporator 10 is an aluminum alloy as described above, it is desirable that copper, platinum, or the like is applied on an insulating film or the like to prevent electrolytic corrosion.

  Next, the operation of the present embodiment based on the above configuration will be described. The flowchart shown in FIG. 4 is a control flow for deodorization and sterilization performed by the control device 60, and will be described below based on this flow.

  First, when the occupant turns on the deodorization switch to perform deodorization and sterilization, the temperature of the air passing through the evaporator 10 is detected from the air conditioning information in step S100. Then, it is determined from the detected air temperature whether or not the cooling operation is currently being performed in step S110. In this determination, when the temperature is low, it is determined that cooling is being performed, and when it is high, it is determined that cooling is not being performed.

  If it is determined in step S110 that cooling is in progress, the dropping of hydrogen peroxide from the supply unit 50 to the heat exchange unit 12 is started in step S120. In step S130, based on the wetting signal from the wetting sensor 70, it is determined whether or not the surface of the heat exchange unit 12 has been wetted by hydrogen peroxide.

  If it is determined in step S130 that the wet state is obtained, the dropping of hydrogen peroxide is stopped in step S140. If it is determined NO in step S130, steps S120 and S130 are repeated until the heat exchange unit 12 is wet with hydrogen peroxide. If it is determined NO in step S110, it is determined in step S150 whether or not the heating (heater 20) operation has ended. If the heating operation has ended, the process proceeds to step S120. If is activated, step S150 is repeated.

  As a result, the active oxygen generated from the hydrogen peroxide directly contacts the odor components and bacteria adhering to the surface of the heat exchange unit 12 of the evaporator 10, so that the odor components and bacteria are efficiently decomposed and sterilized. be able to. And the odor which generate | occur | produces from the evaporator 10 can be suppressed.

  Hydrogen peroxide produces OH (hydroxy radicals) that have higher oxidizing power than ozone and ions as active oxygen, so odor components and bacteria can be removed without leaving oxides generated during the oxidation process. It can be efficiently decomposed and sterilized. Further, even if water such as condensed water adheres to the surface of the heat exchange unit 12, since hydrogen peroxide dissolves in the water, it can directly contact the surface of the heat exchange unit 12.

Since the oxidation catalyst 14b is applied to the surface of the heat exchange unit 12 (radiating fins 14), the Fenton reaction (H ₂ O ₂ → .OH + OH ⁻ ) or the Harbor Vice reaction (H ₂ O ₂ + e ^−). → .OH + OH ⁻ ) is generated on the surface of the heat exchanging portion 12, and the production of OH can be activated, and the decomposition and sterilization ability of odor components and bacteria can be improved.

When the superoxide generating material 14c is applied to the surface of the heat exchanging portion 12, .OH is actively generated due to the reaction between hydrogen peroxide and superoxide (O ₂ ⁻ ) (H ₂ O ₂ + O ₂ ⁻ → 2 · OH + O ₂ ), it is possible to improve the ability to decompose and disinfect odor components and bacteria in the same manner as described above.

  Further, since the hydrophilic film 14a is applied to the surface of the heat radiating fin 14, the condensed water generated on the surface of the evaporator 10 can be prevented from being blown into the room by the conditioned air.

  The oxidation catalyst 14b and the superoxide generating material 14c are not provided on the surface of the heat exchanging unit 12, but are provided on a site where hydrogen peroxide is dropped from the supply unit 50 (a path through which hydrogen peroxide is supplied). May be.

(Second Embodiment)
A second embodiment of the present invention is shown in FIGS. The second embodiment is different from the first embodiment in the means for generating OH from hydrogen peroxide.

  As shown in FIG. 5, the heat exchange unit 12 is provided with a concentration sensor 80 (arranged in the same manner as the wetness sensor 70) that detects the concentration of hydrogen peroxide, and the detection signal is input to the control device 60. I am doing so.

  Further, as shown in FIG. 6, a conductive material 14d such as stainless steel or titanium is applied to the surface of the heat exchanging portion 12 (radiating fin 14) by vapor deposition or the like, and a counter electrode 91 such as platinum is provided on the surface. The counter electrode 91 is applied to the plus of the power source 92, and the heat exchange unit 12 is applied to the minus of the power source 92.

  And the control apparatus 60 controls the action | operation of a deodorizing and disinfection based on the flowchart shown in FIG. In this flowchart, steps S160 to S180 are added to FIG. 4 described in the first embodiment.

  That is, after hydrogen peroxide is supplied to the heat exchange unit 12 (after step S120 to step S140), the heat exchange unit 12 is energized in step S160. The potential applied at this time is 0 to -2.0 V vs. dry cell level. Ag / AgCl. Then, in step S170, it is determined whether or not the concentration of hydrogen peroxide obtained by the concentration sensor 80 is equal to or higher than a predetermined concentration.

As a result, electrons are transferred from the surface of the heat exchanging unit 12 to oxygen, and the Habervis reaction (H ₂ O ₂ + e ⁻ → OH + OH ⁻ ) is performed by the transferred electrons and hydrogen peroxide in the heat exchanging unit 12. Occurring on the surface and OH production can be made active, so that the ability to decompose and disinfect odor components and bacteria can be improved.

  At this time, the applied potential is at the level of a dry cell, and since no high voltage is applied unlike the means for generating ozone or the like, no noise is generated in the radio or stereo used in the passenger compartment, so There is no discomfort.

  The conductive material 14d and the counter electrode 91 are not limited to those described above, and the surface of the evaporator 10 may be a cathode and the counter station 91 may be an anode. However, since some members used in the evaporator 10 need to be protected from corrosion, the members (heat radiation fins 14) of the heat exchanging portion 12 are coated with an insulating material 14e as shown in FIG. There is a need.

  If the concentration of hydrogen peroxide is relatively low on the order of ppm, polyaniline is used as a conductive material for the negative electrode and a material nobler than polyaniline is used for the positive electrode. It is also possible to generate superoxide (superoxide generating means).

In this case, water (condensed water) generated on the surface of the heat exchange unit 12 reacts with superoxide to generate hydrogen peroxide (2H ₂ O + O ₂ ⁻ → 2H ₂ O ₂ ). Furthermore, .OH is generated by superoxide and hydrogen peroxide (H ₂ O ₂ + O ₂ ⁻ → 2.OH + O ₂ ), and higher deodorizing / sterilizing ability can be exhibited.

  Further, the superoxide generating material 14c and the superoxide generating means are not provided on the surface of the heat exchanging unit 12, but are provided in a site where hydrogen peroxide is dropped from the supply unit 50 (a route through which hydrogen peroxide is supplied). Anyway.

(Other embodiments)
In the first and second embodiments, hydrogen peroxide is used as a chemical that generates active oxygen. However, the present invention is not limited to this, and nitric acid, potassium butoxide, BHP (t-Butylhydroxide), etc. good.

  In addition, the supply unit 50 is provided in the vicinity of the evaporator 10, but the present invention is not limited thereto, and a hydrogen peroxide injection port is provided in the case 5 around the evaporator 10. You may make it inject | pour the chemical | medical agent containing hydrogen oxide. In this case, in order to more efficiently attach hydrogen peroxide to the entire surface of the evaporator 10, several injection ports may be provided on the top, bottom, left and right.

  When hydrogen peroxide is injected, if it is reacted with an oxidation catalyst, a superoxide generating material, or the like, the deodorizing / sterilizing ability can be improved.

  Further, the deodorizing switch may be a timer method or an automatic method that automatically starts instead of the manual method switch. In the case of the auto method, for example, the odor concentration around the evaporator 10 is measured, and when the concentration is higher than a certain level, the dropping of hydrogen peroxide may be started. Thereby, it is possible to prevent odorous substances from adhering to the evaporator 10.

It is sectional drawing which shows schematic structure of a temperature control apparatus. It is a front view which shows the external appearance of the evaporator in 1st Embodiment. It is sectional drawing which shows the heat exchange part (radiation fin) surface in FIG. It is a control flowchart for the deodorizing and disinfection operation | movement in 1st Embodiment. It is a front view which shows the external appearance of the evaporator in 2nd Embodiment. It is sectional drawing which shows the heat exchange part (radiation fin) surface in FIG. It is a control flowchart for the deodorizing and sterilizing operation in the second embodiment. It is sectional drawing which shows the modification of the heat exchange part (radiation fin) surface in FIG.

Explanation of symbols

1 Temperature control device (temperature control equipment)
5 Case (covering member)
10 Evaporator (heat exchanger)
14a Hydrophilic film 14b Oxidation catalyst 14c Superoxide generating material 50 Hydrogen peroxide generation supply section (supply section)

Claims (21)

A temperature control device having a function of decomposing and sterilizing odor components and bacteria adhering to the surface of the heat exchanger (10),
A temperature control device comprising a supply means (50) for generating or storing a chemical solution for generating active oxygen and supplying the chemical solution to the surface of the heat exchanger (10).   A temperature control device comprising an inlet for injecting a chemical solution for generating active oxygen from outside the heat exchanger (10) or a member (5) covering the heat exchanger (10).   The temperature control device according to claim 1, wherein the chemical solution is hydrogen peroxide.   The temperature control device according to claim 3, wherein the supply means (50) has an electrode structure including an anode and a cathode for generating hydrogen peroxide.   The temperature control device according to any one of claims 1 to 4, wherein a transition metal or an oxidation catalyst (14b) is exposed on a surface of the heat exchanger (10).   A transition metal or an oxidation catalyst (14b) is provided in a path through which the chemical solution is supplied from the supply means (50) to the surface of the heat exchanger (10). 4. The temperature control device according to any one of 4.   The temperature control device according to claim 5 or 6, wherein the transition metal and the oxidation catalyst (14b) are at least one of platinum, copper, and iron.   The temperature control device according to any one of claims 1 to 4, wherein a superoxide generating material (14c) is exposed on a surface of the heat exchanger (10).   The temperature control device according to any one of claims 1 to 4, wherein means for generating superoxide is provided on a surface of the heat exchanger (10).   The temperature control device according to claim 9, wherein the means for generating the superoxide has a surface of the heat exchanger (10) formed as a part of an electrode structure.   The path through which the chemical solution is supplied from the supply means (50) to the surface of the heat exchanger (10) is provided with a superoxide generating material (14c) or a means for generating superoxide. The temperature control apparatus in any one of Claims 1-4.   A mechanism for applying a negative potential is provided on the surface of the heat exchanger (10) or the path through which the chemical solution is supplied from the supply means (50) to the surface of the heat exchanger (10). The temperature control apparatus according to any one of claims 1 to 4, wherein the temperature control apparatus is characterized.   The negative potential is 0 to -2.0 V vs. It is Ag / AgCl, The temperature control apparatus of Claim 12 characterized by the above-mentioned.   The temperature control device according to any one of claims 1 to 13, wherein the heat exchanger (10) is an evaporator (10).   It is used for motor vehicles, The temperature control apparatus in any one of Claims 1-14 characterized by the above-mentioned.   The temperature control device according to claim 14 or 15, wherein the lower layer of the transition metal or the oxidation catalyst (14b) is formed of a hydrophilic film (14a) having a contact angle of 40 ° or less.   The temperature control device according to claim 15, wherein the supply means (50) is shared with a washer fluid storage unit. A heat exchanger deodorizing / sterilizing method for decomposing and sterilizing odor components and bacteria adhering to the surface of the heat exchanger (10),
Hydrogen peroxide is applied to the surface of the heat exchanger (10),
A method of deodorizing and sterilizing a heat exchanger, wherein active oxygen is generated from hydrogen peroxide by at least one of means for generating a transition metal, an oxidation catalyst (14b), and a superoxide.   The method for deodorizing and sterilizing a heat exchanger according to claim 18, wherein the heat exchanger (10) is intended for an evaporator (10).   20. The heat exchanger deodorization / sterilization method according to claim 18 or 19, wherein the heat exchanger (10) is intended for use in automobiles.   21. The method for deodorizing and sterilizing a heat exchanger according to claim 20, wherein the hydrogen peroxide storage part is shared with the washer liquid storage part.

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