ACCESSORY COMPONENT ASSEMBLY STRUCTURE FOR CANISTERS

Abstract

Accessory component (50) mounting structure for one canister (10), with: a tubular component assembly section (20) provided in the canister (10); and an accessory component (50) which has a heat-generating section (60) which generates heat due to energy input, wherein: the accessory component (50) is inserted into the interior of the component assembly section (20) and is mounted by snapping it into place; a gap opening (75) connects an opening side of the component assembly section (20) with a rear side thereof and is formed between the component assembly section (20) and the accessory component (50); a connecting hole (70, 72) that connects the gap passage (75) to the outside in which the component assembly section (20) is formed; the connecting hole (70, 72) is formed on a side wall (23) and a rear wall (28) of the component assembly section (20); and the side wall (23) and the rear wall (28) of the component assembly section (20) are exposed to the outside.

Description

Technical field

[0001] The present disclosure relates to an accessory component assembly structure for a canister. background

[0002] A conventional accessory component mounting structure can be provided for a canister, for example, the one described in JP 2010-106 712 A. The mounting structure comprises a cylindrical component mounting section provided within the canister and an accessory component that includes a heat-generating section which produces heat upon energy input. The accessory component, which is inserted into the interior of the component mounting section, is fitted by snap-fit. The accessory component has a protrusion that contacts the side wall of the component mounting section, thus suppressing rattling. The accessory component includes a built-in motor that generates heat upon energy input.

[0003] JP 2009-293 438 A discloses an accessory component mounting structure for a jerrycan with a vacuum pump, which is mounted to a housing body of the jerrycan by means of a snap connection. WO 2018 / 230 169 A1 discloses a processing device for vaporized fuel. Summary of the invention Problem to be solved by the invention

[0004] However, according to the accessory component assembly structure for the canister disclosed in JP 2010 - 106 712 A, heat generated by the accessory component's motor can accumulate in the interior of the component assembly section of the canister.

[0005] Therefore, one aspect of the present disclosure is to suppress the accumulation of heat generated by the heat-generating section of the accessory component within the interior of the component assembly section of the canister. Means to solve the problem

[0006] One aspect of the present disclosure is an accessory component assembly structure for a canister according to claim 1.

[0007] As described above, the gap opening, which connects to the outside via the connection hole, is formed between the component mounting section and the accessory component. Therefore, air can pass through the gap opening, and the heat that accumulates in the gap can be dissipated. Consequently, it is possible to prevent the heat generated by the heat-generating section of the accessory component from accumulating inside the component mounting section of the canister. Brief description of drawings Fig. Figure 1 is a perspective view of a canister on which a flushing pump is mounted according to an embodiment of the invention. Fig. Figure 2 is a front view of the flushing pump mounted on the canister. Fig. 3 is a cross-sectional view along line III-III of Fig. 2. Fig. 4 is a cross-sectional view along line IV-IV of Fig. 2. Fig. Figure 5 is a perspective view of a pump assembly section of the canister. Fig. Figure 6 is an exploded view of the canister and the flushing pump. Fig. Figure 7 is a front view of the flushing pump. Fig. Figure 8 is a left side view of the flushing pump. Fig. Figure 9 is a right-side view of the flushing pump. Fig. Figure 10 is a top view of the flushing pump. Fig. Figure 11 is a rear view of the flushing pump. Fig. Figure 12 is a bottom view of the flushing pump. Fig. Figure 13 is a front view of the pump assembly section of the canister. Fig. 14 is a cross-sectional view along line XIV-XIV of Fig. 13. Fig. 15 is a cross-sectional view along line XV-XV of Fig. 13. Embodiments for carrying out the invention

[0008] An embodiment of the present disclosure is described below with reference to the figures. In the present embodiment, a structure for mounting a flushing pump as an accessory component on a canister is described. (Canister)

[0009] In a vehicle, such as an automobile, a canister filled with an adsorbent capable of adsorbing and desorbing fuel vapor is fitted to prevent the fuel vapor generated in the fuel tank from escaping into the atmosphere. The canister allows the adsorbent to capture the fuel vapor produced while the internal combustion engine (engine) is off. When the engine is running, the fuel vapor is desorbed (purged) from the adsorbent using the engine's intake vacuum, and the desorbed fuel vapor is then combusted by the engine.

[0010] Fig. Figure 1 is a perspective view showing the canister to which the flushing pump is mounted. Fig. Figure 2 is a front view of the flushing pump mounted on the canister. Fig. 3 is a cross-sectional view along line III-III of Fig. 2. Fig. 4 is a cross-sectional view along line IV-IV of Fig. 2. Fig. Figure 5 is a perspective view of a pump mounting section of the canister. Directions are discussed with respect to the arrows in each figure. In the present embodiment, the top-bottom direction corresponds to the top-bottom direction of the vehicle. The front-back direction corresponds to the front-back direction of the vehicle. The orientation of the canister can be changed if necessary.

[0011] As in Fig. As shown in Figure 1, a canister 10 can have a canister container 12, which is essentially cuboid in shape and lightweight. The canister container 12 can be hollow and made of resin. An adsorbent capable of adsorbing and desorbing fuel vapor can be filled into the interior of the canister container 12. For example, granular activated carbon can be used as the adsorbent. The granular activated carbon can be, for example, crushed activated carbon (crushed charcoal) and / or granulated charcoal. Powdered activated carbon can be brought into a granular form using a binder, thus forming the granular activated carbon.

[0012] A tank connection 14 can project forward from the center of the front of the canister container 12 and connect to the interior of the canister container 12. An atmosphere connection 16 can project forward from the right end of the front of the canister container 12 and connect to the interior of the canister container 12. A fuel vapor passage connected to the fuel tank can be connected to the tank connection 14. An atmosphere passage open to the atmosphere can be connected to the atmosphere connection 16.

[0013] A pump mounting section 20, having a tubular shape and an opening in its front surface, can be formed on a front section on the left side of the canister container 12. A flushing pump 50 can be housed in the pump mounting section 20 (see Fig. 2 to Fig. 4). As in Fig. As shown in Figure 4, the flushing pump 50 can have a suction port 56 and a discharge port 58. Inside the pump assembly section 20, a flushing port 18, which connects to the interior of the canister container 12, can be configured to project forward. The suction port 56 of the flushing pump 50 can be connected to the flushing port 18. The discharge port 58 of the flushing pump 50 can be connected to a flushing passage that is connected to the intake passage of the motor. The pump assembly section 20 and the flushing pump 50 are described later. (Operation of the canister)

[0014] While the engine is stopped, fuel vapor in the fuel tank is routed via the tank connection 14 to the interior of the canister 10. The fuel vapor is then absorbed by the adsorbent. During engine operation, the fuel vapor is desorbed from the adsorbent by the air flowing into the interior of the canister 10 via the atmosphere connection 16. The fuel vapor is then forcibly purged by the purge pump 50 into the engine's intake port. (Flushing pump 50)

[0015] Fig. Figure 6 is an exploded view of the canister and the flushing pump. Fig. 7 is a front view, Fig. Figure 8 is a left side view, Fig. 9 is a right-side view, Fig. 10 is a top view, Fig. 11 is a rear view and Fig. Figure 12 shows a bottom view of the flushing pump. As in Fig. As shown in Figure 6, the flushing pump 50 can have a pump unit 52 and a motor unit 60. The motor unit 60 can drive the pump unit 52.

[0016] The motor unit 60 may include an electric motor. The motor unit 60 generates heat due to the input of energy. The motor unit 60 corresponds to a "heat-generating section" as used herein. The motor unit 60 may have a substantially cylindrical motor housing 62. The motor housing 62 may have a left end face 62a and an outer circumferential surface 62b.

[0017] A flange 64, which has a larger outer shape than that of the motor housing 62, can be formed at one end (e.g. the right end) in the axial direction of the motor housing 62. As shown in Fig. As shown in Figure 8, the flange 64 can have a side view similar to an octagon. A lower surface 64b and a front surface 64c of the flange 64 are connected orthogonally. This allows the flange 64 to essentially have a heptagonal shape. The flange 64 can have an upper surface 64a and a lower surface 64b that are parallel to each other. An electrical connector 66, projecting forward, can be formed at the upper end of a front surface 64c (see Figure 8). Fig. 10). The electrical connector 66 can be connected to an external connector to supply power to the motor unit 60.

[0018] Snap-in projections 68 can be formed symmetrically up and down on the upper surface 64a and the lower surface 64b of the flange 64 (see Fig. 6, Fig. 7, Fig. 9 and Fig. 10) The locking projection 68 can be formed in a right-angled triangular prism shape. The locking projection 68 can have a slope that is directed obliquely backwards and extends in the left-right direction.

[0019] As in Fig. As shown in Figure 7, the pump unit 52 can have a pump housing 54 which is essentially short and cylindrical in shape. The pump unit 52 can also have an impeller 55 which is housed in the interior of the pump housing 54 and is rotatable about its axis (see Figure 7). Fig. 9) The pump housing 54 can be arranged concentrically on the right side of the flange 64 of the motor unit 60. The pump housing 54 can have an outer diameter larger than the outer diameter of the motor housing 62 of the motor unit 60 and smaller than the outer diameter of the flange 64. The pump housing 54 can have a right end face 54a and an outer circumferential surface 54b.

[0020] As in Fig. As shown in Figure 9, a front surface 54c and a lower surface 54d, which are orthogonal to each other, can be formed at the front lower corner of the outer circumferential surface 54b of the pump housing 54. The front surface 54c can extend tangentially downwards from the front end of the outer circumferential surface 54b. The lower surface 54d can extend tangentially forwards from the lower end of the outer circumferential surface 54b.

[0021] The intake port 56, which has a cylindrical shape and projects to the rear, can be designed on the right end face 54a of the pump housing 54 such that it extends from its axial center to the rear (see Fig. 10 to 12). The discharge port 58, which has a cylindrical shape and extends forward, can be formed at the lower end of the front surface 54c (see Fig. 7) The intake port 56 and the discharge port 58 can be connected to the interior of the pump housing 54. The impeller 55 can be connected to an output shaft provided in the motor unit 60. (Operation of the flushing pump 50)

[0022] When power is supplied to the motor unit 60 of the purge pump 50, the motor unit 60 is driven. Consequently, the impeller 55 of the pump unit 52 is rotated. As a result, the purge gas in the canister 10 is drawn through the intake port 56 of the pump unit 52 and pressurized, then discharged from the discharge port 58. The purge gas discharged from the discharge port 58 can be pumped via the purge passage to the intake port of the motor. (Pump assembly section 20)

[0023] Fig. Figure 13 is a front view of the pump assembly section of the canister. Fig. 14 is a cross-sectional view along line XIV-XIV of Fig. 13. Fig. 15 is a cross-sectional view along line XV-XV of Fig. 13. As in Fig. As shown in Figure 14, the pump mounting section 20 can have a corner wall section 22 having a square-tube shape. The pump mounting section 20 can also have a rear wall 28 that closes the rear end face of the corner wall section 22 (see Figure 14). Fig. 15) The rear wall 28 can also serve as a partition wall separating the interior of the corner wall section 22 and the interior of the canister container 12 in the front and rear directions.

[0024] As in Fig. As shown in Figure 13, the flushing port 18 can be located at a position to the right of the central section of the rear wall 28. The flushing port 18 can be designed in a stepped cylindrical shape that projects forward from the rear wall 28 (see Figure 13). Fig. 14 and Fig. 15). The suction port 56 of the flushing pump 50 can be connected to the flushing port 18 by insertion (see Fig. 3 and Fig. 4).

[0025] As in Fig. As shown in Figure 13, the corner wall section 22 can have a left side wall 23, a right side wall 24, an upper side wall 25, and a lower side wall 26. The pump mounting section 20 corresponds to a "component mounting section" as used herein (see Figure 13). Fig. 14 and Fig. 15) The right side wall 24 can also serve as a partition wall separating the interior of the corner wall section 22 and the interior of the canister container 12 in the right and left directions (see Fig. 15). The upper side wall 25 can be designed such that it is essentially in the same plane as an upper wall 12b of the canister container 12 (see Fig. 6) The left side wall 23, the right side wall 24, the upper side wall 25 and the lower side wall 26 correspond to the “side wall” as used herein.

[0026] As in Fig. As shown in Figure 15, the left side wall 23 of the corner wall section 22 can be positioned further to the left than a left side wall 12a of the canister container 12. This allows the left end 28a of the rear wall 28 to be extended to the left and exposed to the outside (see Figure 15). Fig. 5). As in Fig. As shown in Figure 14, the lower side wall 26 of the corner wall section 22 can be positioned further downwards than a lower wall 12c of the canister container 12. This allows the lower end 28b of the rear wall 28 to extend downwards and be exposed to the outside (see Figure 14). Fig. 5) The left side wall 23, the upper side wall 25, the lower side wall 26, the left end 28a of the rear wall 28 and the lower end 28b of the rear wall 28 correspond to the “wall exposed to the outside”, as used herein.

[0027] As in Fig. As shown in Figure 6, an elastic snap-in element 30, having a strip-plate shape, can be formed at the front end of the center, in the left-right direction, of the upper side wall 25. The elastic snap-in element 30 can be formed by creating a U-shaped cutout 32 in the upper side wall 25 such that it surrounds the elastic snap-in element 30. This allows the front end of the elastic snap-in element 30 to have a free end. The elastic snap-in element 30 is capable of being elastically deformed in the vertical direction (see the dashed-dotted line 30 with two points in Figure 6). Fig. 14). A snap-in hole 34, which has a square shape, can be formed in the middle of the elastic snap-in part 30.

[0028] Another elastic snap-in part 30 (same reference numeral), which is symmetrical up and down with the elastic snap-in part 30 of the upper side wall 25, can be formed on the lower side wall 26. Snap-in holes 34 of both of the elastic snap-in parts 30 can be arranged at positions where both snap-in projections 68 of the flushing pump 50 are engaged when the insertion of the flushing pump 50 with respect to the pump mounting section 20 is complete (see Fig. 3).

[0029] As in Fig. As shown in Figure 13, upper and lower left projections 40, which are parallel to each other, can project from the inner surfaces of the left side wall 23. Upper and lower right projections 41, which are parallel to each other, can project from the inner surface of the right side wall 24. Both left projections 40 and both right projections 41 can be arranged so that they are opposite each other.

[0030] An upper left projection 42 and an upper right projection 43, parallel to each other, can project from the inner surface of the upper side wall 25. A lower left projection 44 and a lower right projection 45, parallel to each other, can project from the inner surface of the lower side wall 26. The upper left projection 42 and the lower left projection 44 can be arranged opposite each other. The upper right projection 43 and the lower right projection 45 can be arranged opposite each other. The left projections 40, the right projections 41, the upper left projection 42, the upper right projection 43, the lower left projection 44, and the lower right projection 45 can be formed in a linear or ribbed shape. These projections 40-45 can extend in the axial direction of the corner wall section 22, i.e., in the front-to-back direction.The left projections 40, the right projections 41, the upper left projection 42, the upper right projection 43, the lower left projection 44 and the lower right projection 45 correspond to the “support projection” as used herein.

[0031] As in Fig. As shown in Figure 6, a reinforcing rib 47, having a flanged configuration, can be formed in an annular shape over the entire circumference of the outer circumferential section of the open end of the corner wall section 22. The reinforcing rib 47 is referred to as a “first reinforcing rib 47”. A reinforcing rib 48, also having a flanged configuration, can be formed in the center of the corner wall section 22 in the front-to-back direction. The reinforcing rib 48 can extend over the outer circumference of the left side wall 23, the upper side wall 25, and the lower side wall 26 and can be formed in a C-shape. The reinforcing rib 48 can be arranged to intersect the area around the rear of both of the elastic snap-in parts 30. The reinforcing rib 48 is referred to as a “second reinforcing rib 48”.The second reinforcing rib 48 can be formed in a ring shape over the entire circumference of the corner wall section 22.

[0032] A connecting hole 70, having a long, narrow shape and extending in the top-bottom direction, can be formed at the rear end of the left side wall 23. The connecting hole 70 penetrates the left side wall 23 in the wall thickness direction, i.e., in the left-right direction (see Fig. 15). The connecting hole 70 is referred to as a “first connecting hole 70”.

[0033] As in Fig. As shown in Figure 5, a connecting hole 72, which has a long, narrow shape and extends in the front-to-back direction, can be formed at the left end 28a of the rear wall 28. The connecting hole 72 penetrates the rear wall 28 in the wall thickness direction, i.e., in the front-to-back direction (see Figure 5). Fig. 15). The connecting hole 72 is referred to as a “second connecting hole 72”. (Mounting the flushing pump 50 on the canister 10)

[0034] As in Fig. As shown in Figure 6, the flushing pump 50 can be inserted into the pump mounting section 20 of the canister 10 from the front (in particular by press fit). At this time, the flushing pump 50 can be inserted with the suction port 56 facing rearward and the motor housing 62 facing to the left.

[0035] During the process of inserting the flushing pump 50 into the pump mounting section 20, the left end face 62a of the motor housing 62 of the flushing pump 50 can be in sliding contact with both left projections 41 of the corner wall section 22. The upper and lower ends of the outer circumferential surface 62b of the motor housing 62 can be in sliding contact with the upper left projection 42 and the lower left projection 44 of the corner wall section 22. Furthermore, the right end face 54a of the pump housing 54 of the flushing pump 50 can be in sliding contact with both right projections 41 of the corner wall section 22. The upper end of the outer circumferential surface 62b of the pump housing 54 can be in sliding contact with the upper right projection 43 of the corner wall section 22. The lower surface 54d of the pump housing 54 can be in sliding contact with the lower right projection 45 of the corner wall section 22.Consequently, the flushing pump 50 can be positioned by press fit and can be positioned with respect to the radial direction of the corner wall section 22. In addition, the suction port 56 can be arranged concentrically with and opposite the flushing port 80.

[0036] Furthermore, when the flushing pump 50 is pushed in, the suction port 56 can be inserted into the flushing port 18, thus completing the connection (see Fig. 2 to 4). Both elastic locking elements 30 of the corner wall section 22 can be bent and deformed in the direction of expansion by both locking projections 68 of the flushing pump 50. Subsequently, both elastic locking elements 30 are elastically reset simultaneously or substantially simultaneously with the completion of the connection between the suction port 56 and the flushing port 18. Thus, both locking holes 34 are engaged with both locking projections 68 (see Fig. 3) As a result, the flushing pump 50 is prevented from detaching from the pump mounting section 20. This completes the snap-fit ​​assembly of the flushing pump 50 to the canister 10 (see Fig. 1).

[0037] The flushing pump 50 can be supported in the interior of the corner wall section 22 with a predetermined gap between it and the pump. This gap can be maintained by the left projections 40, the right projections 41, the upper left projection 42, the upper right projection 43, the lower left projection 44, and the lower right projection 45 of the pump mounting section 20 (see figure). Fig. 2) Thus, a gap opening 75, which connects the front end opening of the pump mounting section 20 with the rear wall 28 of the pump mounting section 20, can be formed between the corner wall section 22 of the pump mounting section 20 and the flushing pump 50 (see Fig. 2 to 4).

[0038] The rear end of the gap opening 75 can be connected to the outside air via the first connecting hole 70 and the second connecting hole 72 of the pump mounting section 20 (see Fig. 4) The gap opening 75 designates a gap section between the corner wall section 22 of the pump mounting section 20 and the flushing pump 50. A predetermined distance can be set, with the exception of the suction port 56, between the rear wall 28 of the pump mounting section 20 and the front of the flushing pump 50 (see Fig. 4).

[0039] The flushing pump 50 can be arranged such that the motor housing 62 of the motor unit 60 faces the left side wall 23 of the pump mounting section 20. The motor housing 62 can be located in the section of the through-hole 75 that extends substantially linearly from the front end opening towards the first connecting hole 70 and the second connecting hole 72. The flushing pump 50 can be arranged such that the pump housing 54 of the pump unit 52 faces the right side wall 24 of the pump mounting section 20.

[0040] The canister 10, to which the flushing pump 50 is mounted (see Fig.1) can be attached to a mounting component, such as a vehicle frame. Therefore, when a vehicle is in motion, the air introduced into the pump mounting section 20 of the canister 10 through its opening passes through the gap 75. The air is then released to the outside via the first connecting hole 70 and the second connecting hole 72. As a result, heat that has accumulated in the gap 75 can be dissipated. (Advantages of the design)

[0041] According to the accessory component assembly structure of the present embodiment, the through-hole 75, which is connected to the outside via the first connecting hole 70 and the second connecting hole 72, can be formed between the pump mounting section 20 and the flushing pump 50. This allows air to pass through the through-hole 75, dissipating any heat that has accumulated in it. Consequently, it is possible to prevent the heat generated by the motor unit 60 of the flushing pump 50 from accumulating in the interior of the pump mounting section 20 of the canister 10. Therefore, deterioration of the flushing pump 50 due to an increase in its temperature can be suppressed. Furthermore, any moisture that may have entered the through-hole 75 can be released to the outside along with the air introduced into the through-hole 75.

[0042] Since the left projections 40, the right projections 41, the upper left projection 42, the upper right projection 43, the lower left projection 44, and the lower right projection 45, which are provided on the pump mounting section 20, bear against the flushing pump 50, rattling of the flushing pump 50 is suppressed. At the same time, it is possible to form a gap that serves as the gap passage 75. By suppressing the rattling of the flushing pump 50, it is possible to suppress the vibration of the flushing pump 50 and the wear of the contact section between each of the projections 40 to 45 and the flushing pump 50. Since the projections 40 to 45 also serve as the form of the gap passage 75 and the support of the flushing pump 50, the design can be simplified.

[0043] The left projections 40, the right projections 41, the upper left projection 42, the upper right projection 43, the lower left projection 44, and the lower right projection 45 can be formed on the pump mounting section 20. Therefore, compared to the case where the projections 40 to 45 are formed on the flushing pump 50, the dimensions of the projections 40 to 45 can be easily controlled, and the support position of the flushing pump 50 can be easily adjusted. Furthermore, it is possible to prevent the heat generated by the motor unit 60 of the flushing pump 50 from accumulating in the interior of the pump mounting section 20 of the canister 10. This can be done without requiring any design modification of the flushing pump 50.

[0044] The flushing pump 50 is held by the projecting ends of the projections 40 to 45. This allows the rattling of the flushing pump 50 to be easily adjusted by the projection extent of the projections 40 to 45 compared to the case where the flushing pump 50 is held in surface contact with the inner surface of the corner wall section 22.

[0045] The first connecting hole 70 is formed on the left side wall 23 of the pump mounting section 20, which is exposed to the outside. The second connecting hole 72 is formed on the left end 28a of the rear wall 28 of the pump mounting section 20, which is exposed to the outside. Therefore, the air permeability of the gap passage 75 can be improved.

[0046] The flushing pump 50 is arranged such that the motor unit 60 faces the left side wall 23 of the pump mounting section 20, which is exposed to the outside. Therefore, compared to the case where the motor unit 60 of the flushing pump 50 faces the right side wall 24 of the pump mounting section 20, which is not exposed to the outside, it is possible to prevent heat from accumulating on the right side wall 24. Consequently, resin deterioration of the right side wall 24 can be suppressed.

[0047] Since the motor unit 60 of the flushing pump 50 is exposed to the through-hole 75, the cooling efficiency of the motor unit 60 can be improved by the air passing through the through-hole 75. Since the motor unit 60 is located in the section of the through-hole that extends substantially linearly from the front end opening of the through-hole 75 towards the first connecting hole 70 and the second connecting hole 72, the cooling efficiency of the motor unit 60 can be further improved.

[0048] The stiffness of the pump mounting section 20 can be improved by the first reinforcing rib 47, which is formed on the outer circumference of the opening end of the corner wall section 22 of the pump mounting section 20.

[0049] The stiffness of the pump mounting section 20 can be improved by the second reinforcing rib 48, which is formed on the outer circumference of the middle section, in the front-back direction, of the corner wall section 22 of the pump mounting section 20.

[0050] Since the heat dissipation area of ​​the pump mounting section 20 is increased by the first reinforcing rib 47 and the second reinforcing rib 48, heat dissipation from the interior of the pump mounting section 20 can be promoted. (Other embodiments)

[0051] The above is a description of one embodiment of the technology disclosed herein. However, the technology can be implemented in various other configurations. For example, in the embodiment described above, the flushing pump 50 is given as an example accessory component. However, a built-in diagnostic (OBD) pump, used for a leak test of the canister 10, which is performed when the vehicle's engine is stopped, or a component other than the accessory component, can be used.

[0052] In the embodiment described above, the gap opening 75 is formed by providing support projections on the pump mounting section 20. However, the gap opening 75 can also be formed by providing support projections on the flushing pump 50. Furthermore, the gap opening 75 can be formed by providing support projections on both the pump mounting section 20 and the flushing pump 50. The rib-shaped support projection can be one or more. The support projection is not limited to a rib shape and can be changed to any shape, as long as the support projection forms a gap opening.

[0053] For example, the number, shape, and arrangement of the connection holes can be modified as needed. For instance, one of the first connection holes 70 and one of the second connection holes 72 can be omitted. The number of the first connection hole 70 and / or the second connection hole 72 can be increased. A connection hole can be formed at a lower end 28b of the rear wall 28. In the above embodiment, the front end opening of the pump mounting section 20 is used as an air inlet, and the first connection hole 70 and the second connection hole 72 are used as air outlets. However, the first connection hole 70 and the second connection hole 72 of the pump mounting section 20 can be used as inlets, and the front end opening can be used as an outlet.

[0054] The first reinforcing rib 47 can be omitted. The number of second reinforcing ribs 48 can be increased or omitted. The reinforcing rib can be formed on an outer circumference of the component assembly section or on an inner circumference. Furthermore, the reinforcing ribs can be continuous in the circumferential direction of the component assembly section or can be formed with interruptions in the circumferential direction.

[0055] The various examples described in detail above with reference to the accompanying drawings are intended to be representative of the present disclosure and are therefore not limiting embodiments. The detailed description is intended to teach a person skilled in the art to implement, use, and / or apply various aspects of the present teachings and thus does not limit the scope of the disclosure in any way. Furthermore, each of the additional features and teachings disclosed above can be applied and / or used separately or with other features and teachings in any combination thereof to provide an improved accessory component assembly structure for a canister and / or a method for implementing and using the same.

[0056] Techniques are disclosed in various aspects of the present disclosure. A first embodiment is an accessory component assembly structure for a canister, comprising a tubular component assembly section provided within the canister and an accessory component having a heat-generating section that generates heat upon energy input. The accessory component is inserted into the interior of the component assembly section and mounted by snap-fit. A gap connecting an open side of the component assembly section to its rear is formed between the component assembly section and the accessory component. A connecting hole connecting the gap to the exterior is formed in the component assembly section.The connecting holes are formed on a side wall and a rear wall of the component assembly section, with the side and rear walls exposed to the outside.

[0057] According to the first embodiment, the gap opening, which connects to the outside via the connecting hole, is formed between the component assembly section and the accessory component. Therefore, air can pass through the gap opening, and the heat that has accumulated in the gap opening can be dissipated. Consequently, it is possible to prevent the heat generated by the heat-generating section of the accessory component from accumulating in the interior of the canister's component assembly section. Since the connecting holes are formed on a side wall and a rear wall of the component assembly section, with the walls exposed to the outside, the air permeability of the gap opening can be improved.

[0058] A second embodiment is the accessory component mounting structure for the canister according to the first embodiment, in which the component mounting section is provided with a support projection. The support projection rests against the accessory component and forms a gap. The gap serves as the through-passage.

[0059] According to the second embodiment, since the support projection provided on the component mounting section rests against the accessory component, it is possible to form a gap that serves as a passage, while also suppressing rattling of the accessory component. Because the support projection is formed on the component mounting section, its dimensions can be easily controlled and the support position of the accessory component can be easily adjusted, compared to when the support projection is formed on the accessory component itself. Furthermore, it is possible to prevent the heat generated by the heat-generating section of the accessory component from accumulating in the interior of the canister's component mounting section. This can be achieved without requiring any modification to the design of the accessory component.

[0060] A third embodiment is the accessory component mounting structure for the canister according to one of the first or second embodiments, in which the accessory component is arranged such that the heat-generating section of the side wall of the component mounting section, which is exposed to the outside, faces the exterior.

[0061] According to the third embodiment, in contrast to the case where the heat-generating section of the accessory component faces the wall of the component mounting section that is not exposed to the outside, it is possible to suppress the accumulation of heat on the wall of the component mounting section that is not exposed to the outside.

[0062] A fourth embodiment is the accessory component mounting structure for the canister according to one of the first to third embodiments, in which the heat-generating section of the accessory component is exposed to the gap opening.

[0063] According to the fourth embodiment, since the heat-generating section of the accessory component is exposed to the gap opening, the cooling efficiency of the heat-generating section can be improved by the air passing through the gap opening.

[0064] A fifth embodiment is the accessory component mounting structure for the canister according to one of the first to fourth embodiments, in which a reinforcing rib extending in the circumferential direction is formed on the component mounting section.

[0065] According to the fifth embodiment, the stiffness of the component mounting section can be improved by the reinforcing rib formed on the component mounting section. Since the heat dissipation area of ​​the component mounting section is increased by the reinforcing rib, heat dissipation from the interior of the component mounting section can be promoted.

Claims

[1] Accessory component (50) mounting structure for a canister (10), comprising: a tubular component assembly section (20) provided in the canister (10); and an accessory component (50) which has a heat-generating section (60) which generates heat due to energy input, wherein: the accessory component (50) is inserted into the interior of the component assembly section (20) and is mounted by snapping it into place; a gap opening (75) connects an opening side of the component assembly section (20) with a rear side thereof and is formed between the component assembly section (20) and the accessory component (50); a connecting hole (70, 72) that connects the gap passage (75) to the outside in which component assembly section (20) is formed; the connecting hole (70, 72) is formed on a side wall (23) and a rear wall (28) of the component assembly section (20); and the side wall (23) and the rear wall (28) of the component assembly section (20) are exposed to the outside. [2] Accessory component (50) mounting structure for the canister (10) according to claim 1, wherein the component mounting section (20) is provided with a support projection (40, 41, 42, 43, 44, 45) which abuts the accessory component (50) and forms a gap which serves as the gap passage (75). [3] Accessory component (50) mounting structure for the canister (10) according to claim 1 or 2, wherein the accessory component (50) is arranged such that the heat-generating section (60) faces a side wall (23) of the component mounting section (20) which is exposed to the outside. [4] Accessory component (50) mounting structure for the canister (10) according to one of claims 1 to 3, wherein the heat-generating section (60) of the accessory component (50) is exposed to the gap opening (75). [5] Accessory component (50) mounting structure for the canister (10) according to one of claims 1 to 4, wherein a reinforcing rib (47, 48) extending in the circumferential direction is formed on the component mounting section (20).

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