JP2019100259A - Exhaust emission control device - Google Patents

Abstract

To maintain a temperature of a catalyst by efficiently utilizing heat of an exhaust gas, and to reduce pressure loss with respect to the exhaust gas in the case where heat is not stored in a heat storage material.SOLUTION: An exhaust emission control device 12 includes: a catalyst carrier 16 for carrying a catalyst 18; and a storage member 32 in which a heat storage container 34 is stored, and which takes an upper position in which the heat storage container 34 is made to drop to the inside of an exhaust pipe 14 from above the exhaust pipe 14, and a lower position at which the heat storage container 34 which has dropped from the inside of the exhaust pipe 14 is received below the exhaust pipe 14. In the exhaust pipe 14, an upper communication part communicable with the storage member 32 which is at the upper position, and a lower communication part communicable with the storage member 32 which is at the lower position are provided.SELECTED DRAWING: Figure 1

Description

  The present application relates to an exhaust purification system.

  In Patent Document 1, an exhaust gas of an engine provided with a heat storage material provided with a material having a melting point and a freezing point in the vicinity of a set temperature in the activation temperature range of the catalyst on the upstream side of the catalyst in the exhaust passage of the engine. A purification device is described.

  Patent Document 2 discloses a catalyst case apparatus having a catalyst case accommodating a catalyst for exhaust gas purification and an exhaust heat recovery unit for recovering heat of exhaust gas passing through the catalyst and performing heat transfer with the catalyst. Is described.

  In Patent Document 3, an exhaust gas purifier in which a plurality of catalysts are arranged in series in an exhaust passage through which exhaust gas of an engine passes, and a heat storage body is arranged between an upstream catalyst and a downstream catalyst. Is described.

Japanese Patent Application Laid-Open No. 60-212608 JP 2000-179338 A JP, 2000-274231, A

  In the technology described in Patent Document 1, the exhaust passage is diverted to the heat storage portion and the bypass portion in the diverting portion. When the exhaust passes through the heat storage section in which the heat storage material is interposed, the heat is also dissipated from the piping of the heat storage section, so the heat of the exhaust can not be efficiently transferred to the heat storage material or the catalyst.

  In the technology described in the cited document 2, the exhaust heat recovery unit is fixed to the outer peripheral side of the cylindrical body of the catalyst case, and can not directly receive the heat of the exhaust.

  In the technique described in Patent Document 3, since the heat storage body is always located in the exhaust passage, when it is not necessary to store heat in the heat storage body, the pressure loss to the exhaust gas becomes large.

  As described above, the techniques described in any of the patent documents are improved in that the heat of the exhaust is efficiently used to maintain the temperature of the catalyst, and the pressure loss to the exhaust is reduced when heat is not stored in the heat storage material. There is room.

  The object of the present invention is to maintain the temperature of the catalyst by efficiently utilizing the heat of the exhaust and to reduce the pressure loss to the exhaust when the heat is not stored in the heat storage material.

  In the first aspect, a catalyst carrier provided in the exhaust pipe and carrying a catalyst for purifying the exhaust, a heat storage material container in which a heat storage material is enclosed, and the heat storage material container are accommodated, and A storage member that takes an upper position where the heat storage material container falls into the inside of the exhaust pipe, and a lower position that receives the heat storage material container that falls from the inside of the exhaust pipe below the exhaust pipe; And an upper communication portion capable of communicating with the housing member at the upper position, and a lower communication portion provided at the exhaust pipe and capable of communicating with the housing member at the lower position.

  In this exhaust purification system, the exhaust gas flowing through the exhaust pipe can be purified by the catalyst carried by the catalyst carrier.

  The heat storage material container in which the heat storage material is sealed is housed in the housing member. When the storage member is at the upper position, the heat storage material container falls into the inside of the exhaust pipe through the upper communication portion provided in the exhaust pipe. That is, since the heat storage material is present inside the exhaust pipe, the heat of the exhaust acts directly on the heat storage material. In addition, since the heat storage material is present inside the exhaust pipe and the branched portion of the exhaust pipe is unnecessary, the heat of the exhaust does not escape to the branched portion. Thereby, the heat of exhaust can be efficiently transmitted to the heat storage material. Then, the heat stored in the heat storage material is applied to the catalyst when the temperature of the catalyst decreases, for example, and the temperature decrease of the catalyst is suppressed, whereby the exhaust gas purification capacity of the catalyst can be maintained.

  When the storage member is in the lower position, the heat storage material container falls from the inside of the exhaust pipe to the storage member through the lower communication portion. Since there is no (or little) heat storage material container, ie, no heat storage material, inside the exhaust pipe, the pressure loss to the exhaust flowing through the exhaust pipe is small.

  In addition, both the movement of the heat storage material container from the storage member at the upper position to the inside of the exhaust pipe and the movement of the heat storage material container from the inside of the exhaust pipe to the storage member at the lower position both It is realized by dropping it. The heat storage material container is moved using gravity, and a member for introducing the heat storage material container into the inside of the exhaust pipe or discharging it from the inside of the exhaust pipe is unnecessary, and the structure can be simplified.

  In a second aspect, in the first aspect, the housing member rotates about the center line of the exhaust pipe to move the upper position and the lower position.

  It is possible to move the upper position and the lower position with a simple structure in which the housing member is rotated about the center line of the exhaust pipe.

  According to a third aspect, in the second aspect, a rotating portion which constitutes a part of the exhaust pipe and rotates with the housing member in a circumferential direction of the exhaust pipe, and is provided in the rotating portion, A communication hole having a through hole located above the center line by rotation, becoming the upper communication portion, and being a lower portion and being the lower communication portion, and the receiving member being in communication with the through hole Have.

  When the rotating portion forming a part of the exhaust pipe rotates in the circumferential direction of the exhaust pipe, the housing member also rotates together. The through hole provided in the rotating portion is positioned above the center line to be the upper communication portion, and is positioned below to be the lower communication portion. Since the housing member is provided with the communication hole communicating with the through hole, in the state where the housing member is at the upper position, the exhaust pipe from the housing member through the communication hole and the through hole serving as the upper communication portion. The heat storage material container falls into the inside of the container. When the housing member is in the lower position, the heat storage material container falls from the inside of the exhaust pipe to the housing member through the through hole and the communication hole which are the lower communication portion.

  As described above, the heat storage material container can be introduced from the housing member into the exhaust pipe or discharged from the exhaust pipe by a simple operation of rotating the rotating portion.

  In addition, since the through holes provided in the rotating portion serve as the upper communicating portion and the lower communicating portion, and it is not necessary to provide both the upper communicating portion and the lower communicating portion in the exhaust pipe, the structure can be simplified.

  According to a fourth aspect, in any one of the first to third aspects, the exhaust pipe is provided on the upstream side and the downstream side of the exhaust with respect to the upper communication part and the lower communication part, respectively, inside the exhaust pipe, The exhaust gas has a holding member which passes and holds the heat storage material container without passing it.

  In the state where the heat storage material container is inside the exhaust pipe, the heat storage material container can be held at a predetermined position by the holding member. The holding member allows the exhaust gas to pass therethrough, and does not disturb the flow of the exhaust gas inside the exhaust pipe.

  In a fifth aspect, in any one of the first to fourth aspects, the catalyst is also supported on the outside of the heat storage material container.

  Not only the catalyst supported on the catalyst support but also the catalyst supported on the outside of the heat storage material container can purify the exhaust gas.

  In a sixth aspect, according to any one of the first to fifth aspects, the heat storage material container is made of ceramic.

  Since the heat storage material container is made of ceramic, for example, as compared with the configuration made of metal, it is easy to maintain high resistance to exhaust.

  Since the present invention is configured as described above, the heat of the exhaust is efficiently used to maintain the temperature of the catalyst, and the pressure loss to the exhaust can be reduced when the heat is not stored in the heat storage material.

FIG. 1 is a cross-sectional view showing the exhaust gas control apparatus of the first embodiment in a cross section along the longitudinal direction of the exhaust pipe with the housing member at the upper position. FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1, showing the exhaust purification system of the first embodiment with the housing member in the upper position. FIG. 3 is a partially broken perspective view showing the heat storage material container of the exhaust gas purification apparatus of the first embodiment. FIG. 4 is a cross-sectional view showing the exhaust purification system of the first embodiment in a cross section along the longitudinal direction of the exhaust pipe with the housing member in the lower position. FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 4 showing the exhaust purification system of the first embodiment with the housing member in the lower position. FIG. 6 is a cross-sectional view showing the exhaust purification system of the first embodiment in a cross section along the longitudinal direction of the exhaust pipe with the housing member at the intermediate position. 7 is a cross-sectional view taken along line 7-7 of FIG. 6, showing the exhaust purification system of the first embodiment with the housing member at an intermediate position. FIG. 8 is a partially broken perspective view showing a modification of the heat storage material container of the exhaust purification system of the first embodiment, which is different from FIG. 3.

  Hereinafter, the exhaust purification system 12 of the first embodiment will be described with reference to the drawings.

  The exhaust purification device 12 is applied to an automobile having an engine, as an example. As shown in FIG. 1 and FIG. 2, the exhaust gas purification device 12 has a catalyst carrier 16 attached to the inside of an exhaust pipe 14 of a vehicle. The catalyst carrier 16 carries a catalyst 18 for purifying the exhaust gas discharged from the engine. In the present embodiment, the exhaust pipe 14 is substantially cylindrical, but a part in the longitudinal direction is a large diameter pipe 14B whose diameter is larger than that of the other part. The catalyst carrier 16 is disposed in the large diameter pipe 14B.

  Hereinafter, when simply referred to as “upstream side” and “downstream side”, the upstream side and the downstream side in the flow direction (the direction of the arrow F1) of the exhaust in the exhaust pipe 14 are respectively referred to.

  In the large diameter piping 14B, the rotary piping 20 is provided on the upstream side of the portion where the catalyst carrier 16 is disposed. The rotary pipe 20 is a cylindrical pipe concentric with and of the same diameter as the large diameter pipe 14B, but a holding member (not shown) is rotatable in the circumferential direction centering around the center line CL-1 of the large diameter pipe 14B. Is held by. A seal member 22 seals between the large diameter pipe 14B and the rotary pipe 20 so that the exhaust gas does not leak from between the large diameter pipe 14B and the rotary pipe 20 even if the rotary pipe 20 rotates. There is.

  The rotary pipe 20 forms a part of the exhaust pipe 14 and is a part that is an example of a rotary unit in the exhaust pipe 14.

  The exhaust purification device 12 has a rotation drive mechanism 24 that rotationally drives the rotation pipe 20. In the example shown in FIG. 2, a first gear 26 circumferentially arranged on the outer surface of the rotary pipe 20, a second gear 28 meshing with the first gear 26, and a motor 30 for rotating the second gear 28 Have.

  The specific configuration of the rotational drive mechanism 24 is not limited to this. For example, the rotational drive force of the motor 30 may be applied to the rotational pipe 20 by the belt to rotate.

  The housing member 32 is disposed outside the rotary pipe 20. A heat storage material container 34 is housed inside the housing member 32.

  As shown in FIG. 3, the heat storage material container 34 is a container in which the heat storage material 36 is enclosed. In the example shown in FIG. 3, the heat storage material container 34 has a spherical outer shell 38, and the outer diameter of the outer shell 38 is, for example, about 1 to 10 mm. The material of the outer shell 38 of the heat storage material container 34 may be, for example, a metal, but is a ceramic in the present embodiment. The heat storage material 36 is enclosed inside the outer shell 38. The heat storage material 36 can store this heat by receiving the heat from the high temperature exhaust gas, and can release the stored heat to the low temperature environment.

  The housing member 32 has a cylindrical or rectangular box shape in the example shown in FIG. 1 and FIG. 2, and the communication hole 40 is formed on the surface facing the rotary pipe 20. A through hole 42 communicating with the communication hole 40 is formed in the rotary pipe 20. The housing member 32 rotates integrally with the housing member 32 about the center line CL-1 in a state where the communication hole 40 and the through hole 42 communicate with each other, and the rotary pipe 20 (part of the exhaust pipe 14) And the lower lower position LP (see FIGS. 4 and 5).

  As shown in FIGS. 1 and 2, the through hole 42 of the rotary pipe 20 is located above the center line CL-1 in the state where the housing member 32 is at the upper position UP, and the through hole 42 It has become. On the other hand, as shown in FIGS. 4 and 5, in the state where the housing member 32 is at the lower position LP, the through hole 42 is positioned lower than the center line CL-1, and becomes the lower communication portion 42L. ing.

  With the storage member 32 at the upper position UP, the heat storage material container 34 drops from the storage member 32 into the interior of the rotary pipe 20 through the communication hole 40 and the through hole 42 (upper communication portion 42U). In the state where the housing member 32 is at the lower position LP, the heat storage material container 34 is dropped from the rotary pipe 20 into the housing member 32 through the through hole 42 (lower communication portion 42L) and the communication hole 40.

  Inside the exhaust pipe 14, a pair of holding members 44 are provided on the upstream side and the downstream side of the rotary pipe 20. The holding member 44 is a plate-like or film-like member in which an air vent 44H of an inner dimension smaller than the diameter of the heat storage material container 34 is formed. Specifically, a mesh member or a punching metal can be exemplified. Since the inner dimension of the vent hole 44 H is smaller than the outer diameter of the heat storage material container 34, the heat storage material container 34 inside the rotary pipe 20 is held between the pair of holding members 44. However, even in this case, the exhaust gas flows from the upstream side to the downstream side through the vent holes 44H.

  In the example shown in FIG. 1, the pair of holding members 44 are both provided on the rotary pipe 20, but for example, the upstream holding member 44 is provided on the exhaust pipe 14 on the upstream side of the rotary pipe 20. May be Similarly, the downstream side holding member 44 may be provided on the exhaust pipe 14 at the downstream side of the rotary pipe 20.

  By connecting the pair of holding members 44, the distance between the holding members 44 may not be changed. In any case, if the upstream side holding member 44 is positioned upstream of the through hole 42 and the downstream side holding member 44 is positioned downstream of the through hole 42, the pair of holding members 44 is In the meantime, the heat storage material container 34 dropped from the housing member 32 can be held.

  Next, the operation of the present embodiment will be described.

  As shown in FIGS. 1 and 2, in the state where the housing member 32 is at the upper position UP, the through hole 42 of the rotary pipe 20 is the upper communication portion 42U, and communicates with the communication hole 40 of the housing member 32. There is. The heat storage material container 34 inside the accommodation member 32 drops to part of the rotary pipe 20, that is, the exhaust pipe 14 through the communication hole 40 and the through hole 42 by gravity. Since the heat storage material 36 of the heat storage material container 34 exists inside the exhaust pipe 14, when the high temperature exhaust flows through the exhaust pipe 14, the heat storage material 36 directly receives and stores the heat of the exhaust gas. Can.

  Since the exhaust pipe 14 is provided with the holding member 44, the heat storage material container 34 is held between the holding members 44 inside the exhaust pipe 14, and the expansion of the heat storage material container 34 in the flow direction of the exhaust is suppressed.

  Here, for example, in the state where the exhaust gas does not flow through the exhaust pipe 14 when the engine is stopped, the heat stored in the heat storage material 36 suppresses the temperature decrease of the heat storage material container 34, and further this heat is used as a catalyst carrier. The temperature decrease of the catalyst 18 is suppressed by acting on the 16 catalysts 18. The temperature of the catalyst 18 can be maintained high (for example, above the activation temperature) for a long time as compared with the exhaust gas purification device having a structure without the heat storage material 36. The "activation temperature" is the lower limit temperature at which the catalyst 18 exerts the effect of purifying the exhaust gas highly.

  Then, even if, for example, the engine which has been stopped is restarted and a low temperature exhaust flows through the exhaust pipe 14, the exhaust can be purified by the catalyst 18 if the temperature of the catalyst 18 of the catalyst carrier 16 is maintained high. . Furthermore, the heat stored in the heat storage material 36 acts on the catalyst of the catalyst carrier 16 by the flow of the exhaust, so that the temperature decrease of the catalyst is suppressed.

  Thus, in the present embodiment, a state is realized in which the heat storage material 36 enclosed in the heat storage material container 34 is present inside the exhaust pipe 14, so if high temperature exhaust flows through the exhaust pipe 14 The heat of the exhaust can be efficiently applied to the heat storage material 36 for heat storage.

  Then, by causing the heat stored in the heat storage material 36 to act on the catalyst of the catalyst carrier 16, the effect of the catalyst purifying the exhaust can be maintained high.

  Further, in the present embodiment, when the housing member 32 is at the lower position LP, the through hole 42 of the rotary pipe 20 is the lower communication portion 42L and is in communication with the communication hole 40 of the housing member 32. The heat storage material container 34 inside the rotary piping 20 falls through the through hole 42 and the communication hole 40 by gravity, and receives the heat storage material container 34 in which the storage member 32 has dropped. Since the heat storage material container 34 does not exist inside the exhaust pipe 14, no resistance by the heat storage material container 34, that is, no pressure loss occurs with respect to the exhaust gas flowing through the exhaust pipe 14. For example, even when the engine speed and generated torque are high and the pressure of the exhaust is high, the exhaust can be smoothly flowed in the exhaust pipe 14. In other words, under conditions where high torque and high rotation are required and the flow rate of the exhaust flowing through the exhaust pipe 14 increases, the heat storage material container 34 is discharged from the inside of the exhaust pipe 14 with the housing member 32 at the lower position LP. Thus, it is possible to reduce the influence on the output torque and the rotational speed of the engine by preventing the pressure loss to the exhaust gas caused by the heat storage material container 34.

  In addition, in the present embodiment, with the housing member 32 at the lower position LP, in a state where the heat storage material container 34 is not present inside the exhaust pipe 14, the exhaust gas hits the heat storage material container 34 directly. Reaching As a result, the heat of the exhaust can be efficiently applied to the catalyst 18 of the catalyst support 16 to raise the temperature of the catalyst 18 in a short time.

  Moreover, in the present embodiment, it is not necessary to provide a bypass passage or the like in the exhaust pipe 14 in order to switch whether to perform heat storage and heat radiation to the heat storage material 36. Since the bypass path is not provided in the exhaust pipe 14, the heat of the exhaust does not escape to the bypass path, and the heat of the exhaust is efficiently conducted to the heat storage material 36 or the heat of the heat storage material 36 is a catalyst of the catalyst carrier 16 You can tell

  In the present embodiment, the heat storage material container 34 is affected by the introduction of the heat storage material container 34 from the storage member 32 into the inside of the exhaust pipe 14 and the discharge of the heat storage material container 34 from the inside of the exhaust pipe 14 into the storage member 32. The heat storage material container 34 is dropped by gravity. The structure can be simplified because a mechanism for moving the heat storage material container 34 from the housing member 32 to the inside of the exhaust pipe 14 or moving it from the inside of the exhaust pipe 14 to the housing member 32 is unnecessary.

  Although the upper position UP and the lower position LP are mentioned as an example of the position of the accommodation member 32 in the above, as shown in FIGS. 6 and 7, an intermediate position MP which is an intermediate position between them may be adopted. In the state where the housing member 32 is at the intermediate position MP, it is possible to take a state in which only a part (for example, about half) of all the heat storage material containers 34 housed in the housing member 32 exist inside the rotary pipe 20.

  In the above, the structure in which the through hole 42 provided in the rotary pipe 20 becomes the upper communication portion 42U or the lower communication portion 42L depending on the rotation posture of the rotary pipe 20 is exemplified. In this structure, the through hole 42 substantially serves as both the upper communication portion 42U and the lower communication portion 42L. Therefore, compared to the structure in which the upper communication portion and the lower communication portion are separately provided, only one hole is required to penetrate the rotary pipe 20, and simplification of the structure and maintenance of strength of the rotary pipe 20 can be achieved. it can.

  In the present embodiment, a part of the exhaust pipe 14 is used as the rotary pipe 20. With this structure, by rotating the rotary pipe 20, it is possible to realize the state in which the exhaust pipe 14 has the upper communication portion 42U and the state in which the exhaust pipe 14 has the lower communication portion 42L.

  The through hole 42 of the housing member 32 communicates with the through hole 42 of the rotary pipe 20, and the through hole 42 does not communicate with the outside of the exhaust pipe 14. Thereby, the exhaust gas inside the exhaust pipe 14 is suppressed from leaking to the outside.

  The structure in which the housing member 32 rotates integrally with the rotary pipe 20 has been described above as the structure for moving the housing member 32 so as to adopt the upper position UP and the lower position LP. As a result, with a simple operation of rotating the rotary pipe 20, it is possible to realize a structure in which the housing member 32 takes the upper position UP and the lower position LP.

  The structure in which the housing member 32 adopts the upper position UP and the lower position LP is not limited to the rotation of the rotary pipe 20 described above. For example, a rotating portion such as the rotary pipe 20 is not provided in a part of the exhaust pipe 14, and a through portion acting as an upper communicating hole and a penetrating portion acting as a lower communicating hole, namely two penetrating portions, are provided in the exhaust pipe. Form it. Then, the storage member is moved by the moving mechanism to the upper position and the lower position by the slide or the like in the horizontal direction and the vertical direction (vertical direction) without rotating, and is connected to either of the two penetrating portions. Good. In this structure, if a valve is provided in the through portion, the valve being open in a state in which the receiving member is connected and closed in a state in which the receiving member is not connected, the through portion in a state in which the receiving member is not connected It is possible to prevent the exhaust inside the exhaust pipe from leaking out.

  In the present embodiment, it is also possible to use the heat storage material container 54 of the modified example shown in FIG. In the heat storage material container 54, the catalyst 18 is supported on the outside of the outer shell 38. The catalyst 18 may be, for example, the same as or different from the catalyst 18 supported on the catalyst support 16.

  In the structure of the modification, the exhaust gas can be purified also by the catalyst 18 carried by the heat storage material container 54.

  Moreover, the catalyst 18 is in contact with the heat storage material container 54, and receives the heat of the heat storage material 36, so that the effect of suppressing the temperature drop is high.

  Furthermore, when the catalytic reaction of the catalyst 18 supported on the heat storage material container 54 occurs, the temperature of the passing exhaust can be raised by this catalytic reaction. Then, by causing the temperature rise exhaust heat to act on the catalyst 18 of the catalyst support 16, it is possible to suppress the temperature drop of the catalyst 18 of the catalyst support 16 or shorten the temperature rise time. It is.

  In addition, if the outer shell 38 is made of ceramic, the catalyst 18 can be easily supported on the fine structure (fine irregularities and holes) of the ceramic, and the drop of the catalyst 18 from the outer shell 38 can be suppressed.

  Further, by making the outer shell 38 of ceramic, for example, it is possible to suppress the deterioration due to the contact of the exhaust as compared with the case of metal. And, by suppressing the deterioration of the outer shell 38, the heat storage material 36 can be kept sealed in the outer shell 38 for a long period of time.

  In the exhaust gas purification apparatus according to the above-described embodiment, the heat storage material 36 is not particularly limited as long as it can store heat by receiving heat from high temperature exhaust and can dissipate heat to low temperature exhaust. For example, a molten salt having a melting point in the range of 100 ° C. to 600 ° C. can be used. A molten salt is a substance obtained by melting a solid salt or oxide at room temperature into a liquid by heating, and is composed of a cation and an anion. And enthalpy changes with phase change (melting, first order transition, or second order transition), and heat storage and heat radiation are carried out.

  In each embodiment, the phase change of the heat storage material 36 at the time of actually storing and releasing heat may be melting accompanied by phase transition between the solid phase and the liquid phase, and at the time of phase change, the heat storage material stores heat and releases heat as latent heat. . On the other hand, heat may be stored and released as a phase change that does not involve a phase transition between the solid phase and the liquid phase.

  The temperature of the phase change of the heat storage material 36 is preferably a temperature higher than the activation temperature of the catalyst 18. As a result, the temperature at the phase transition of the heat storage material 36 becomes equal to or higher than the activation temperature of the catalyst 18, so it is easy to maintain the state where the catalyst 18 can efficiently purify the exhaust gas.

  Note that even in the temperature range where the heat storage material does not undergo phase transition, heat is accumulated and dissipated as sensible heat, so the heat accumulation and dissipation as the sensible heat may be used to suppress the temperature decrease of the catalyst 18.

  In the molten salt, particularly, the molten salt having a phase change temperature in the range of 100 ° C. or more and 600 ° C. or less can perform heat exchange with the exhaust efficiently and can be preferably applied to the exhaust purification system of each embodiment and modification. .

  Depending on the type of molten salt, there are also molten salts whose volume changes due to phase change. In the case of using a molten salt whose volume changes, in the heat storage material container 34, a sufficient volume may be secured inside the outer shell 38 so as to be able to absorb the volume change of the molten salt.

12 exhaust purification device 14 exhaust pipe 16 catalyst carrier 18 catalyst 20 rotational piping 24 rotational drive mechanism 32 accommodation member 34 thermal storage material container 36 thermal storage material 38 outer shell 40 communication hole 42 through hole 42L lower communication portion 42U upper communication portion 44 holding member 44H vent 54 heat storage material container

Claims (6)

A catalyst carrier which is provided in the exhaust pipe and carries a catalyst for purifying the exhaust gas;
A heat storage material container in which a heat storage material is enclosed;
The heat storage material container is accommodated, and the heat storage material container dropped from the inside of the exhaust pipe below the exhaust pipe from the upper position where the heat storage material container is dropped into the inside of the exhaust pipe from above the exhaust pipe A lower position to receive, and a receiving member to take
An upper communication portion provided in the exhaust pipe and capable of communicating with the housing member at the upper position;
A lower communication portion provided in the exhaust pipe and capable of communicating with the housing member at the lower position;
An exhaust purification device having the The housing member is
The exhaust gas purification apparatus according to claim 1, wherein the exhaust gas purification device rotates around the center line of the exhaust pipe and moves the upper position and the lower position. A rotating portion that forms a part of the exhaust pipe and rotates with the housing member in the circumferential direction of the exhaust pipe;
A through hole provided in the rotating portion, positioned above the center line by rotation of the rotating portion to become the upper communication portion, and positioned below to become the lower communication portion;
Have
The exhaust purification system according to claim 2, wherein the housing member has a communication hole communicating with the through hole.   In the exhaust pipe, a holding member is provided upstream and downstream of the exhaust with respect to the upper communication portion and the lower communication portion, the exhaust member being allowed to pass and the heat storage material container not being allowed to be held. The exhaust gas purification apparatus according to any one of claims 1 to 3, which has.   The exhaust gas control apparatus according to any one of claims 1 to 4, wherein the catalyst is also carried on the outside of the heat storage material container.   The exhaust gas purification apparatus according to any one of claims 1 to 5, wherein the heat storage material container is made of ceramic.