JP4691386B2 - Evaporative fuel processing apparatus and manufacturing method thereof - Google Patents

Description

  The present invention relates to an evaporative fuel device, and more specifically, an evaporative fuel that temporarily adsorbs and collects evaporative fuel in order to prevent evaporative fuel generated in a fuel tank of an internal combustion engine from being released to the atmosphere. The present invention relates to a fuel processing apparatus.

  In automobiles, it is required to prevent the evaporation fuel (fuel component) in the evaporation fuel tank from diffusing into the atmosphere. Therefore, the evaporated fuel generated in the fuel tank or the like while the engine is stopped is adsorbed by the adsorbent in the evaporated fuel processing device, and the air is taken into the evaporated fuel processing device by the negative pressure of the intake pipe during the operation of the engine. The adsorbed fuel component is desorbed and supplied to the combustion chamber of the engine through the intake pipe for combustion treatment. Activated carbon is used as an adsorbent for such a fuel vapor processing apparatus.

  This activated carbon generates heat when the evaporated fuel is adsorbed and the temperature increases and the adsorbing capacity decreases. On the other hand, when the adsorbed evaporated fuel is desorbed, the heat is deprived and the temperature decreases and the desorbing capacity decreases. There's a problem.

Therefore, as shown in FIG. 6, by attaching the heat storage particles to the surface of the activated carbon 100, the adsorption heat of the activated carbon 100 is transferred to the heat storage particles during the adsorption of the evaporated fuel to the activated carbon 100, thereby increasing the temperature of the activated carbon 100. Patent Document 1 discloses that the temperature of the activated carbon 100 is suppressed when the evaporated fuel is desorbed from the activated carbon 100 and the activated carbon 100 takes away the heat stored in the heat storage particles. Yes.
JP 10-339218 A

  In the prior art, since the heat storage particles are merely attached to the activated carbon 100, the activated carbon adsorbents made of the activated carbon 100 and the heat storage particles are individually independent, and the contact between the activated carbon adsorbents is as shown in FIG. Furthermore, the point contact 101 is obtained, and the contact area is small. In addition, since the activated carbon adsorbents are not bonded to each other, the activated carbon adsorbents move due to vibration or the like, an air layer is interposed between the activated carbon adsorbents, and the thermal conductivity between the activated carbon adsorbents is poor.

  Therefore, the adsorption heat of the evaporated fuel can be absorbed or held only by the heat capacity of the attached heat storage particles, and the adsorption / desorption performance is poor.

  The contact between the container 102 having a large heat capacity and the activated carbon adsorbent is also the point contact 103, so that the contact area is small, the thermal conductivity between the activated carbon adsorbent and the container 102 is poor, and the temperature rise of the activated carbon adsorbent is suppressed. However, the adsorption performance is deteriorated, and the desorption performance of the evaporated fuel from the activated carbon adsorbent is not good.

  Further, since the activated carbon adsorbents are not bonded to each other, the activated carbon adsorbents may be damaged by rubbing the activated carbon adsorbents with each other.

  Accordingly, an object of the present invention is to provide an evaporative fuel processing apparatus capable of enhancing evaporative fuel adsorption / desorption performance and a method for manufacturing the same.

In order to solve the above-mentioned problem, the invention according to claim 1 is an evaporative fuel processing apparatus in which an adsorbent is housed in a case.
On the surface of the adsorbent has a resin, and a heat storage material consisting of a material having a large or larger heat capacity thermal conductivity than the adsorbent, the adsorbent mutually coupled through the resin, coupled The evaporative fuel processing apparatus is characterized in that the outer shape of the adsorbent is formed in a shape along the inner surface shape of the case with which the adsorbent contacts .

  According to a second aspect of the present invention, in the evaporative fuel processing apparatus according to the first aspect, the case is formed of a resin having a heat storage material made of a material having a larger thermal conductivity or a larger heat capacity than the adsorbent. It is characterized by that.

  According to a third aspect of the present invention, in the fuel vapor processing apparatus according to the first or second aspect, the case is provided with fins.

  According to a fourth aspect of the present invention, in the evaporative fuel treatment device according to any one of the first to third aspects, the resin that forms the surface of the adsorbent and / or the resin that forms the case is made of a thermoplastic resin. It is a feature.

  A fifth aspect of the present invention is the evaporative fuel processing apparatus according to any one of the first to fourth aspects, wherein the adsorbent is activated carbon.

The invention according to claim 6 stores, in the case, an adsorbent having a heat storage material made of a material having a thermal conductivity larger than that of the adsorbent or a large heat capacity compared to the adsorbent on the surface of the adsorbent,
Thereafter, the adsorbent is bonded to each other through the resin by cooling after the resin is heated and melted.

  The invention according to claim 7 is the method for manufacturing an evaporative fuel processing device according to claim 6, wherein the adsorbents are bonded to each other through the resin by heating and pressurizing the resin and then cooling the resin. It is characterized by making it.

  The invention according to claim 8 is the method of manufacturing an evaporative fuel treatment device according to claim 6 or 7, wherein the heating of the resin is performed by energizing the adsorbent and self-heating of the adsorbent. is there.

The invention according to claim 9 is an adsorption having a resin and a heat storage material made of a material having a larger thermal conductivity or a larger heat capacity than the adsorbent on the surface of the adsorbent, outside the case of the evaporative fuel treatment apparatus. The body is filled in a mold, the resin is heated and melted and then cooled, the adsorbents are bonded to each other through the resin, and the outer shape is the shape of the inner surface of the case containing the adsorbent. An evaporative fuel processing apparatus manufacturing method comprising: forming an adsorbent unit having a shape along the shape and storing the adsorbent unit in the case.

  A tenth aspect of the present invention is the method of manufacturing an evaporative fuel processing apparatus according to any of the sixth to ninth aspects, wherein the resin that forms the surface of the adsorbent and / or the resin that forms the case is made of a thermoplastic resin. It is characterized by.

  An eleventh aspect of the present invention is the method of manufacturing an evaporative fuel processing apparatus according to any one of the sixth to tenth aspects, wherein the adsorbent is activated carbon.

  According to the first aspect of the present invention, since the resin is provided on the surface of the adsorbent, the resin can be melted and the adsorbents can be easily bonded to each other through the resin.

  Thus, since the adsorbents are bonded to each other through the resin, the contact area between the adsorbents through the resin is increased as compared with the conventional technique.

  Therefore, in the prior art, the thermal conductivity between the activated carbons (adsorbents) is poor, and the adsorption heat of the evaporated fuel can be absorbed only by the heat capacity of the attached heat storage particles, but according to the present invention, the thermal conductivity between the adsorbents is low. High, the adsorption heat of the evaporated fuel can be absorbed by all the adsorbents, and the effect of suppressing the temperature rise of the adsorbents is higher than that of the prior art. In addition, the effect of suppressing the temperature drop is higher compared to the prior art even when the evaporated fuel is desorbed. Therefore, the adsorption / desorption performance of the evaporated fuel can be improved.

  In addition, compared with the prior art, the contact area with the case through the resin of the adsorbent is increased, and the thermal conductivity between the case having a large heat capacity and the adsorbent is higher than the total heat capacity of the heat storage material, The effect of suppressing the temperature increase of the adsorbent during adsorption of the evaporated fuel and the effect of suppressing the temperature decrease during desorption of the evaporated fuel are further enhanced.

  In addition, since the adsorbents are bonded to each other with resin, the relative movement of the adsorbents is prevented, eliminating the need for multiple parts such as filters, perforated plates and spring materials that hold the activated carbon that flows in the prior art. Can be simplified and the cost can be reduced.

  Further, since the adsorbents are bonded with each other by the resin, the adsorbents are not rubbed with each other by vibration, and damage to the adsorbent can be reduced, so that reliability is improved.

  According to the second aspect of the present invention, the heat capacity and heat transfer performance are improved, and the heat transfer performance from the adsorbent to the case is improved, compared with a case made of only general nylon. The temperature change of the adsorbent can be further suppressed, and the adsorption / desorption performance of the adsorbent can be further improved.

  According to the invention described in claim 3, when the fin is formed on the inner surface of the case, the contact area between the case and the adsorbent increases, and the heat transfer between the adsorbent and the case can be further improved. The adsorption / desorption performance of the adsorbent can be further improved.

  Further, when fins are provided on the outer surface of the case, the heat dissipation of the case is improved, the temperature rise of the adsorbent can be further suppressed, and the adsorption performance of the adsorbent can be further improved.

  According to the invention described in claim 4, it is further easy to bond the adsorbents and / or to form the case.

According to the sixth aspect of the present invention, the evaporated fuel processing apparatus of the first aspect can be manufactured.
According to the seventh aspect of the present invention, the outer surface shape of the adsorbent combined by pressurization can be the inner surface shape of the case, the contact area between the case having a large heat capacity and the adsorbent is increased, and the adsorbent is adsorbed. The thermal conductivity between the agent and the case can be further increased, and the adsorption / desorption performance of the adsorbent can be further increased.

  According to the eighth aspect of the invention, since the resin is heated by the self-heating of the adsorbent, the heating time can be shortened, the production efficiency can be improved, and the cost can be reduced.

  According to the ninth aspect of the present invention, since the adsorbent unit molded in advance is housed in the case, the manufacturing efficiency is improved and the cost can be reduced.

  According to the invention of claim 10, the same effect as that of claim 4 can be exhibited.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

1 to 3 show a first embodiment of the present invention.
FIG. 1 shows a schematic configuration of an evaporative fuel processing apparatus (canister) 1, and the evaporative fuel processing apparatus 1 includes a case 2 made of resin. The case 2 includes a case body 2a having an opening on one end side (lower side in FIG. 1) and a lid 2b that closes the opening. A partition wall 3 is provided in the case body 2a. The partition wall 3 and the lid 2b are not in contact with each other, and a gap 4 is provided. A first chamber 5 and a second chamber 6 are formed by the partition wall 3, and the first chamber 5 and the second chamber 6 communicate with each other through a gap 4.

  A tank port 7 communicating with the first chamber 5 is provided on the other end side (upper side in FIG. 1) of the case body 2a, and the tank port 7 communicates with the upper air chamber of the fuel tank. It has become.

  Further, a purge port 8 communicating with the first chamber 5 is provided on the other end side (upper side in FIG. 1) of the case body 2a. The purge port 8 is connected to an intake passage of the engine via a purge control valve (VSV) / purge passage (not shown).

  Further, an atmospheric port 9 communicating with the second chamber 6 is provided on the other end side (upper side in FIG. 1) of the case body 2a, and the atmospheric port 9 communicates with the atmosphere.

  A filter 10 made of nonwoven fabric or the like is provided between the first chamber 5 and the tank port 7, and a filter 11 made of nonwoven fabric or the like is provided between the first chamber 5 and the purge port 8, and the second A filter 12 made of nonwoven fabric or the like is provided between the chamber 6 and the atmospheric port 9.

  Further, as shown in FIG. 3, an adsorbent unit 15 in which an adsorbent 15a for adsorbing / desorbing evaporated fuel is mutually coupled is housed in the first chamber 5, and the adsorbent unit 15 and the lid 2b are accommodated. Between the two, an elastic body 16 having air permeability is accommodated. In Example 1, urethane foam was used as the elastic body 16. By the elastic body 16, the adsorbent unit 15 is always urged to the other end side (upper side in FIG. 1) of the case body 2a to prevent rattling.

  In the second chamber 6, similarly to the first chamber 5, an adsorbent unit 17 similar to the adsorbent unit 15 and an elastic body 18 having air permeability are accommodated.

  Next, the adsorbent units 15 and 17 will be described in detail with reference to FIG. Since the adsorbent unit 15 on the first chamber 5 side and the adsorbent unit 17 on the second chamber 6 side have the same structure, the adsorbent unit 17 on the second chamber 6 side is shown in parentheses in FIG.

  Examples of the adsorbents 15a and 17a constituting the adsorbent units 15 and 17 that can be used in the present invention include activated carbon, silica gel, inorganic zeolite, organic zeolite, activated alumina, resin adsorbent, and metal organic complex. However, in this embodiment, an example in which activated carbon is used as the adsorbents 15a and 17a will be described. Therefore, the adsorbent units 15 and 17 are described as the activated carbon units 15 and 17.

  The activated carbons 15a and 17a are formed of granulated coal having a predetermined average particle diameter. In addition, you may form activated carbon 15a, 17a with crushed charcoal.

  And the surface layer is formed by making the resin 18 containing the thermal storage material 19 adhere to the surface of activated carbon 15a, 17a. A thermoplastic resin and a thermosetting resin can be used as the resin material of the resin 18, and examples of the thermoplastic resin include polyamide, polyacetal, polyphenylene sulfide, polypropylene, polyether isid, polyethylene, and the like. Examples of the curable resin include an acrylic resin, an epoxy resin, a phenol resin, and the like. However, the use of a thermoplastic resin facilitates bonding between activated carbons described later.

  As a method of attaching the resin to the activated carbon, an existing technique can be arbitrarily used. For example, a method described in JP-A-2001-129393 can be applied. An example of a method for adhering the resin 18 containing the heat storage material 19 in the present invention to the surfaces of the activated carbons 15a and 17a according to the present invention will be described below.

  The activated carbons 15a and 17a are immersed in a solution (for example, water) so that the solution is sufficiently impregnated in the pores of the activated carbons 15a and 17a. Next, the activated carbons 15a and 17a are immersed in a solution of the resin 18 containing the heat storage material 19, and the resin 18 containing the heat storage material 19 is attached to the surfaces of the activated carbons 15a and 17a. Thereafter, the activated carbons 15a and 17a are taken out from the solution, preliminarily dried at room temperature, and then dried by heating to a temperature (for example, 100 to 150 ° C.) at which the resin softens or hardens in the drying furnace and the solution evaporates. Let Thereby, the resin 18 gradually softens or hardens, and a layer of the resin 18 containing the heat storage material 19 is formed on the entire surfaces of the activated carbons 15a and 17a. Further, in the process, the solution (for example, water) impregnated in the pores of the activated carbon particles 15a and 17a evaporates, and the solution (for example, water) molecules are released through the resin 18 layer on which the molecules are being formed, Thereby, innumerable fine holes are formed in the resin 18 layer. That is, the entire surfaces of the activated carbons 15 a and 17 a are covered with a porous resin 18 layer containing the heat storage material 19.

  Further, as the heat storage material, a material having a higher thermal conductivity or a larger heat capacity than the adsorbents (activated carbon in this embodiment) 15a and 17a to be attached is used. For example, iron, copper, aluminum Or inorganic materials such as alumina, ceramics, and glass.

  Adsorption / desorption performance can be further improved by using a heat conductive resin in which the heat storage materials in the resin are connected by a heat conduction path such as a low melting point alloy (networked) as the resin containing the heat storage material. . As this heat conductive resin, for example, heat conductive resin NT-783 (trade name) manufactured by Nippon Kagaku Yakin Co., Ltd. can be mentioned.

  The heat storage material 19 may not be contained in the resin 18 and the heat storage material 19 and the resin 18 may be separately attached to the surfaces of the activated carbons 15a and 17a. In this case, the heat storage material 19 has a size that does not block the micropores formed in the activated carbons 15a and 17a, for example, a particle diameter of about 0.1 μm.

  Those having the resin 18 and the heat storage material 19 on the surfaces of the activated carbons 15a and 17a are hereinafter referred to as adsorbers 15A and 17A.

  Next, a method of filling the adsorbers 15A and 17A into the case 2 (first chamber 5 and second chamber 6) will be described.

  First, as shown in FIG. 2, the case body 2a is installed with its tank port 7, purge port 8 and atmospheric port 9 side facing down and the opening side facing up, and the filters 10, 11, 12 Is set at a predetermined position. Next, the adsorbents 15A, 17A made of activated carbon 15a, 17a, etc. are filled into the case main body 2a (first chamber 5, second chamber 6) by a predetermined amount. Next, the plates 20 and 21 are set on top of the filled adsorbers 15A and 17A. The plates 20 and 21 are made of a resin such as polytetrafluoroethylene (PTFE), and the outer peripheral shape thereof is formed to be slightly smaller than the opening surfaces of the first chamber 5 and the second chamber 6.

Next, the case main body 2a is put in a heating furnace (not shown) in the above-described state, and heated in the heating furnace to melt the resin 18 adhered to the surfaces of the activated carbons 15a and 17a. The load is applied by a pressure device (not shown). The pressurizing load is set to such an extent that the shapes of the activated carbons 15a and 17a are not broken, and is set to, for example, about 1 g / mm ² .

  As shown in FIG. 3, the activated carbons 15 a and 17 a are bonded to each other via the resin 18 by the heating and pressurizing, and become activated carbon units 15 and 17 in the case 2 a.

  Then, the case main body 2a is taken out from the heating furnace, the plates 20 and 21 are removed, and as shown in FIG. 1, the elastic bodies 16 and 18 are placed on the opening side of the case main body 2a and closed with the lid 2b.

  Next, the operation in a state where the evaporative fuel processing device (canister) is mounted on an automobile will be described as is well known.

  While the engine is stopped, the evaporated fuel generated in the fuel tank flows into the evaporated fuel processing apparatus 1 from the fuel tank through the tank port 7, and the activated carbon unit 15 in the first chamber 5, the elastic body 16, the gap 4, the elasticity It flows through the body 18 and the activated carbon unit 17 in the second chamber 6 and is discharged from the atmosphere port 9 to the atmosphere. At that time, the evaporated fuel (fuel component) is adsorbed by the activated carbons 15 a and 17 a in the first chamber 5 and the second chamber 6, and when it is released from the atmospheric port 9 to the atmosphere, it is in a state of only air.

  Next, when the engine is operated, the purge control valve is opened by an electronic control unit (ECU) (not shown), and air is discharged from the atmospheric port 9 into the second chamber 6 of the evaporated fuel processing device 1 by the negative pressure in the intake passage. Inhaled. The sucked air passes through the activated carbon unit 17 in the second chamber 6, the elastic body 18, the gap 4, the elastic body 16, and the activated carbon unit 15 in the first chamber 5, and is supplied from the purge port 8 to the intake passage of the engine. The At that time, the evaporated fuel adsorbed on the activated carbons 15a and 17a is desorbed and supplied to the engine together with the intake air.

Since it has the above structure, the following effects can be obtained.
The adsorption heat generated when the evaporated fuel is adsorbed by the activated carbons 15a and 17a is absorbed by the heat storage material 19 in the resin 18 attached to the surfaces of the activated carbons 15a and 17a, and the temperature of the activated carbons 15a and 17a. The increase is suppressed and the decrease in the adsorption performance of the activated carbon is suppressed.

  Further, when the evaporated fuel adsorbed on each activated carbon 15a, 17a is desorbed, the heat stored in the heat storage material 19 in the resin 18 is transmitted to the activated carbon 15a, 17a, and the temperature of each activated carbon 15a, 17a decreases. Is suppressed, and a decrease in the desorption performance of the activated carbon is suppressed.

  Furthermore, in the present invention, the activated carbons 15a and 17a are bonded to each other with the resin 18 to form the activated carbon units 15 and 17, so that the contact area between the activated carbons 15a and 17a is as shown in FIG. It becomes larger than (FIG. 6). Thereby, in the conventional technology, the thermal conductivity between the activated carbons is poor, and the adsorption heat can be absorbed only by the heat capacity of the attached heat storage particles, but according to the present invention, the thermal conductivity between the activated carbons 15a and 17a is high, The heat of adsorption can be absorbed by the activated carbon units 15 and 17 as a whole, and the effect of suppressing the temperature rise is higher than that of the prior art. Further, even when the evaporated fuel is desorbed, the temperature of the activated carbon units 15 and 17 is suppressed as a whole, and the desorbing performance of the evaporated fuel becomes higher than that of the prior art.

  Moreover, the outer peripheral surface shape of the activated carbon units 15 and 17 is formed in the shape along the inner surface shape of the case main body 2a by heating and pressurizing when manufacturing the activated carbon units 15 and 17. For this reason, compared with a prior art, the contact area of the activated carbon units 15 and 17 (activated carbon 15a, 17a) and the case main body 2a becomes large. As a result, the contact area between the case main body 2a having a larger heat capacity than the total heat capacity of the heat storage material 19 and the activated carbon 15a, 17a via the resin 18 is increased, and the heat of adsorption of the activated carbon 15a, 17a is more effectively reduced. 2a can be transmitted, and the effect of suppressing the temperature rise can be further enhanced. Similarly, the effect of suppressing the temperature drop at the time of desorption of the evaporated fuel becomes higher.

  Further, the activated carbons 15a and 17a are bonded to each other with a resin to form activated carbon units 15 and 17, so that the activated carbon is held in order to hold granular activated carbon because it is not unitized in the prior art. The perforated plate, the filter, and the spring material for biasing the activated carbon can be replaced with the elastic bodies 16 and 18, and the structure can be simplified and the cost can be reduced.

  Further, since the activated carbon is combined into a unit, the activated carbon does not rub against each other due to vibration, and damage to the activated carbon can be reduced, so that reliability is improved.

  In addition, even if it uses the said adsorbent other than activated carbon instead of the activated carbon of a present Example, the effect | action and effect similar to the above are acquired.

FIG. 4 shows a second embodiment.
The second embodiment shows a modification of the first embodiment, and the method of forming the activated carbon units (adsorbent units) 15 and 17 is different from that of the first embodiment.

  In the second embodiment, the adsorbers 15A and 17A having the resin 18 and the heat storage material 19 on the surfaces of the activated carbons 15a and 17a as described above are used as the case body 2a (first chamber 5 and second chamber 6) as described above. Then, the plate 20a and the electrodes 22a and 22b are set on the top of the filled adsorbent 15A, and the plate 21a and the electrodes 23a and 23b are set on the top of the filled adsorbent 17A. The plates 20a and 21a are formed of a resin such as polytetrafluoroethylene (PTFE) as in the first embodiment. In FIG. 4, reference numeral 30 denotes an electric supply wiring to the electrodes 22a, 22b, 23a, and 23b.

Next, electricity is applied between the electrodes 22a and 22b and between the electrodes 23a and 23b, and the activated carbons 15a and 17a are heated by self-heating to melt the resin 18 attached to the surfaces of the activated carbons 15a and 17a. At the same time, a load is applied from above the plates 20a and 21a by a pressure device (not shown). The pressurizing load is set to such an extent that the shapes of the activated carbons 15a and 17a are not broken, and is set to, for example, about 1 g / mm ² .

  As shown in FIG. 3, the activated carbons 15 a and 17 a are bonded to each other via the resin 18 by the heating and pressurizing, and become activated carbon units 15 and 17 in the case 2 a.

  Then, the plates 20a and 21a and the electrodes 22a, 22b, 23a, and 23b are removed, and the elastic bodies 16 and 18 are set and closed with the lid 2b as described above.

  In addition, about the member similar to the said Example 1, the code | symbol similar to the above is attached | subjected and description is abbreviate | omitted. Also in the second embodiment, the same adsorbents 15a and 17a as in the first embodiment can be used.

Also in the second embodiment, the same effects as in the first embodiment are obtained.
Furthermore, in the present Example 2, since the self-heating of activated carbon is used, the heating time can be shortened as compared with Example 1, and the cost can be reduced without requiring a high temperature bath.

  In the first or second embodiment, the activated carbon units (adsorbent units) 15 and 17 are molded by heating in the case body 2a. However, the activated carbon units 15 and 17 are not formed in the case body 2a but in a separately provided mold. May be molded and inserted into the case body 2a.

  In the molding method of the third embodiment, first, a mold frame made of metal or the like is prepared separately from the case main body 2a. After filling a predetermined amount of the adsorbents 15A and 17A into the mold, the activated carbon units 15 and 17 are molded by the same molding method as in Example 1 or 2. The side surfaces of the activated carbon units 15 and 17 are formed in the same manner as the inner surface of the case body 2a.

  Note that a plurality of activated carbon units may be formed in the mold, and these activated carbon units may be combined to form activated carbon units 15 and 17 having the same size as that in the case body 2a.

Thereafter, the activated carbon units 15 and 17 are inserted into the case body 2a.
In the third embodiment, the same adsorbents 15a and 17a as in the first embodiment can be used. Others are the same as those in the first or second embodiment, and the description thereof is omitted.

Also in the third embodiment, the same effects as in the first or second embodiment are obtained.
Furthermore, in the third embodiment, unitized activated carbon is stored in the case body 2a, so that the productivity of the evaporated fuel processing apparatus 1 is improved and the cost can be reduced.

  In this embodiment, the case main body 2a and the lid body 2b of the first to third embodiments are molded from a resin having a heat storage material. In this embodiment, the case body 2a and the lid 2b are molded from a resin containing a heat storage material. is there. As this resin material, a thermoplastic resin and a thermosetting resin can be used. Examples of the thermoplastic resin include polyamide, polyacetal, polyphenylene sulfide, polypropylene, polyether isid, polyethylene, and the like. Examples of the resin include acrylic resin, epoxy resin, and phenol resin. However, the case 2a and the lid 2b can be easily molded by using a thermoplastic resin.

Further, the heat storage material is the same as the heat storage material 19 used in the first embodiment.
Further, as the resin containing the heat storage material, it is better to use a heat conductive resin in which the heat storage materials in the resin are connected by a heat conduction path such as a low melting point alloy as in the first embodiment.

  Also in the fourth embodiment, the adsorbents 15A and 17A housed in the case main body 2a are similar to the first to fourth embodiments in that the resin 18 and heat storage are provided on the surfaces of the activated carbon (adsorbent) 15a and 17a. Further, the filling method is the same as in the first to fourth embodiments.

  In the fourth embodiment, the same adsorbents 15a and 17a as in the first embodiment can be used. Others are the same as those in the first to third embodiments, and the description thereof is omitted.

In the fourth embodiment, the same effects as in the first to third embodiments are obtained.
In the fourth embodiment, the following effects can be obtained.

  The case main body 2a and the lid body 2b are generally formed only of nylon, but the case main body 2a and the lid body 2b can be formed by forming the case main body 2a and the lid body 2b with a resin having a heat storage material as described above. The heat capacity and heat transfer performance of the activated carbon 15a, 17a to the case body 2a are improved, the temperature change of the activated carbon 15a, 17a can be further suppressed, and the adsorption / desorption performance of the activated carbon 15a, 17a is improved. It can be improved.

FIG. 5 shows a fifth embodiment.
In the fifth embodiment, fins 25a and 25b are provided on the inner and outer peripheral surfaces of the side surfaces of the case body 2a of the first to fourth embodiments as shown in FIG.

  Since other structures are the same as those in the first to fourth embodiments, the same members as those in the first embodiment are denoted by the same reference numerals as those described above, and the description thereof is omitted. In the fifth embodiment, the same activated carbon (adsorbent) 15a, 17a as in the first embodiment can be used.

In the fifth embodiment, the same effects as in the first to fourth embodiments are obtained.
Further, the adsorbers 15A and 17A housed in the case body 2a have the resin 18 and the heat storage material 19 on the surfaces of the adsorbents 15a and 17a as in the first to fourth embodiments. The method is the same as in the first to fourth embodiments.

Furthermore, the following effects are obtained in the fifth embodiment.
By providing the fin 25a on the inner peripheral surface of the case body 2a, the contact area can be increased via the resin 18 between the case body 2a and the activated carbons 15a and 17a, and the activated carbons 15a and 17a and the case 2a Heat transfer can be improved, temperature changes of the activated carbons 15a and 17a can be further suppressed, and adsorption / desorption performance of the activated carbons 15a and 17a can be further improved.

  Further, by providing the fins 25b on the outer peripheral surface of the case body 2a, the heat dissipation of the case body 2a can be improved, the temperature rise of the activated carbons 15a and 17a can be further suppressed, and the adsorption performance of the activated carbons 15a and 17a can be further improved.

  The fins may be provided only on the inner peripheral surface of the side surface of the case body 2a or only on the outer peripheral surface.

It is a longitudinal cross-sectional view which shows the evaporative fuel processing apparatus in Example 1 of this invention. It is a figure explaining the filling method of the adsorbent in the case in Example 1 of this invention, (a) is a longitudinal cross-sectional view, (b) is the sectional view on the AA line in (a). It is an expansion schematic diagram of the adsorption body in Example 1 of this invention. It is a figure explaining another example of the filling method of the adsorbent in the case in Example 2 of this invention, (a) is a longitudinal cross-sectional view, (b) is a BB sectional drawing in (a). . It is a figure which shows the case main body in Example 5 of this invention, (a) is a longitudinal cross-sectional view, (b) is CC sectional view taken on the line in (a). It is an expansion schematic diagram of activated carbon in a prior art.

Explanation of symbols

1 Evaporative fuel processing device 2 Case 15, 17 Adsorbent unit (activated carbon unit)
15a, 17a Adsorbent (activated carbon)
18 Resin 19 Heat storage material 25a, 25b Fin

Claims (11)

In the evaporative fuel processing device in which the adsorbent is stored in the case,
On the surface of the adsorbent has a resin, and a heat storage material consisting of a material having a large or larger heat capacity thermal conductivity than the adsorbent, the adsorbent mutually coupled through the resin, coupled The evaporative fuel processing apparatus is characterized in that the outer shape of the adsorbent is formed in a shape along the inner surface shape of the case in contact with the adsorbent .   2. The evaporative fuel processing apparatus according to claim 1, wherein the case is formed of a resin having a heat storage material made of a material having a larger thermal conductivity or a larger heat capacity than the adsorbent.   The evaporative fuel processing apparatus according to claim 1, wherein fins are provided in the case.   The evaporative fuel processing apparatus according to any one of claims 1 to 3, wherein a resin formed on a surface of the adsorbent and / or a resin forming a case is made of a thermoplastic resin.   The evaporative fuel treatment apparatus according to claim 1, wherein the adsorbent is activated carbon. On the surface of the adsorbent, a resin and an adsorbent having a heat storage material made of a material having a thermal conductivity larger than that of the adsorbent or a large heat capacity are housed in a case.
Thereafter, the adsorbent is bonded to each other through the resin by cooling after the resin is heated and melted.   The method for manufacturing an evaporative fuel processing apparatus according to claim 6, wherein the adsorbents are bonded to each other through the resin by heating, pressurizing, and then cooling the resin.   The method for manufacturing an evaporative fuel processing apparatus according to claim 6 or 7, wherein the resin is heated by energizing the adsorbent and by self-heating of the adsorbent. Outside the case of the evaporative fuel treatment apparatus, the adsorbent having a heat storage material made of a material having a higher thermal conductivity or a larger heat capacity than the adsorbent is filled in the mold on the surface of the adsorbent, An adsorbent unit in which the resin is heated and melted and then cooled so that the adsorbents are bonded to each other through the resin, and the outer shape of the adsorbent is a shape that conforms to the inner surface shape of the case in which the adsorbent is stored. And the adsorbent unit is housed in the case.   10. The method for manufacturing an evaporative fuel treatment apparatus according to claim 6, wherein the resin formed on the surface of the adsorbent and / or the resin forming the case is made of a thermoplastic resin.   The method for manufacturing an evaporative fuel treatment device according to any one of claims 6 to 10, wherein the adsorbent is activated carbon.

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