JP4981876B2 - Dust-proof cap used in vehicle air conditioners - Google Patents

Description

  The present invention relates to a dustproof cap used in a vehicle air conditioner that closes a passage of a cooling means in the vehicle air conditioner.

  Conventionally, a vehicle air conditioner includes an evaporator that cools air and a heater core that heats air, and mixes the cooled air and the heated air at a desired mixing ratio, toward the vehicle interior. The temperature and humidity in the vehicle compartment are adjusted by selectively blowing air from a plurality of opened outlets.

  The vehicle air conditioner including the above-described evaporator is disposed on the vehicle interior side separated from the engine room by a vehicle partition, and is connected to a compressor or the like disposed in the engine room via a pipe and a connecting member. Has been. Then, the refrigerant compressed by the compressor is introduced into the evaporator through the high-pressure side pipe and the connecting member, and after the heat exchange with the air is performed in the evaporator, the refrigerant is again introduced through the low-pressure side pipe. It is circulated to the compressor.

  In this evaporator, for example, the ends of the high-pressure side and low-pressure side pipes constituting the refrigerant passage are connected to a single block, and a set of connection holes communicating with the refrigerant passage is formed in the block, and the block is It connects with piping and a connection member by the side of an engine room. At this time, since the connection hole of the block opens to the outside, dust or the like may enter the evaporator through the connection hole before connecting the evaporator to the connection member on the engine room side. Concerned.

  In order to prevent the entry of dust and the like into the evaporator, a cap that closes the connection hole of the block is known. The cap is provided separately for each pair of connection holes, and the connection holes are blocked by inserting a blocking portion protruding from the end face of the cap into the connection holes (for example, patents). Reference 1).

JP-A-9-11733

  By the way, in the prior art which concerns on patent document 1, since it mounts | wears with a separate cap with respect to one set of connection holes provided in the block, the mounting operation | work is complicated and the number of parts is also large. There is a problem that it increases.

  Further, when the cap is removed from the block when the block is connected to the connecting portion on the engine room side, it is necessary to remove the cap separately, and there is a problem that work efficiency when the cap is detached is lowered. .

  On the other hand, when the cap is detached from the block, the operator grips the head of the cap and pulls the cap away from the block. There is a demand for reliable removal.

  The present invention has been made in consideration of the above-mentioned various problems, and can be easily attached to and detached from the connection portion of the cooling means, and the refrigerant flows through the end face of the connection portion. An object of the present invention is to provide a dustproof cap used in a vehicle air conditioner capable of reliably closing a communication hole.

In order to achieve the above object, the present invention provides a vehicle air conditioner including an evaporator that cools air in a housing and supplies cold air.
The evaporator is connected to a pair of passages for circulating a coolant Rutotomoni, is mounted on the connecting portion having a bore which communicates with connected respectively passageway, the Kiana unit before that opens to an end face of the connecting portion A dust-proof cap used in a vehicle air-conditioning device that closes,
The dust-proof cap comprises a body having a interpolation join the club that will be inserted into the hole, and a through hole which is inserted in the connecting portions bolt facing disposed to the bolt,
A diameter of the insertion hole is set to be larger than an outer diameter of the bolt and a nut for fixing the bolt .

According to the present invention, by which to holes formed in the end surface of the connecting portion of the evaporator mounting the dust-proof cap having a interpolation join the club, easily and reliably closing the hole by the dustproof cap In addition, a hole portion through which the bolt disposed in the connecting portion is inserted is formed, and the diameter of the hole portion is set larger than the outer peripheral diameter of the nut for fixing the bolt.

Thus, to the anti-dust cap thus the evaporator enters it is possible to reliably prevent such as dust, after mounting the dust-proof cap to the connecting part, the bolt and nut through the through hole Installation work can be performed.

Further, a set of insertion portions may be provided corresponding to the hole portions, and the insertion holes may be formed between the insertion portions.

Further, the body may be joined to rotatable hook the bonding portion between the body as a fulcrum.

Furthermore, it is preferable that the hook portion is provided with a bent portion that is bent by a predetermined angle between the joining portion and the tip portion, and the bent portion is disposed outside the opening of the housing.

Furthermore, the insertion portion may be formed to protrude in a cylindrical shape from the body abutting on the connection portion, and a rib protruding in a radially outward direction is provided on the outer peripheral surface of the insertion portion, and the hole portion is interposed through the rib. It is good to fit.

Furthermore, the body is provided detachably with respect to the insertion hole, and by providing a cover member that covers the insertion hole and the bolt, it is possible to prevent dust and the like from adhering to the bolt. When connecting the connecting portion and the mating member via the bolt, the connecting operation can be performed smoothly.

In addition, a flange that protrudes radially outward from the outer peripheral surface is formed at an end of the cover member, and by engaging the flange with a flange formed in the insertion hole, The displacement in the axial direction is restricted, and as a result, the cover member can be integrally attached to the body via the insertion hole.

  According to the present invention, the following effects can be obtained.

That is, by attaching the dust cap relative hole portion formed on the end face of the connecting portion of the evaporator, the hole easily and reliably through the insertion portion formed in the body in dustproof cap closure In addition , since the bolt is inserted and a hole having a diameter larger than the outer diameter of the nut for fixing the bolt is provided , the bolt is inserted after the dust cap is attached to the connecting portion. Bolts and nuts can be attached through the holes.

1 is an external perspective view showing a state in which a dustproof cap is detached from the vehicle air conditioner in the vehicle air conditioner to which the dustproof cap according to the first embodiment of the present invention is applied. It is an expansion perspective view which shows the state with which the dustproof cap of FIG. 1 was mounted | worn with the connection block of the evaporator. FIG. 3 is an enlarged perspective view showing a state where the dustproof cap of FIG. 2 is detached from the connection block. It is an enlarged plan view which shows the state with which the dustproof cap of FIG. 1 was mounted | worn with respect to the connection block. It is a partial cross section enlarged side view which shows the state with which the dustproof cap of FIG. 2 was mounted | worn to the connection block of an evaporator. FIG. 6 is an enlarged side view showing a state in which the hook part of FIG. 5 is rotated by being pressed toward the body side by a second case. It is an expansion perspective view which shows the state with which the dustproof cap which concerns on the 2nd Embodiment of this invention was mounted | worn with the connection block of the evaporator. It is an enlarged plan view which shows the state with which the dustproof cap of FIG. 7 was mounted | worn with respect to the connection block. It is an enlarged side view which shows the state with which the cap for dust protection of FIG. 7 was mounted | worn with respect to the connection block. It is an expansion perspective view which shows the state with which the dustproof cap which concerns on the 3rd Embodiment of this invention was mounted | worn with the connection block of the evaporator. It is an enlarged plan view which shows the state with which the dustproof cap of FIG. 10 was mounted | worn with respect to the connection block. It is a partial cross section enlarged side view which shows the state with which the dustproof cap of FIG. 10 was mounted | worn with respect to the connection block. It is a disassembled perspective view of the dust-proof cap single-piece | unit which shows the state which removed the cover member from the body of FIG.

  A preferred embodiment of a dustproof cap used in a vehicle air conditioner according to the present invention will be described below in detail with reference to the accompanying drawings.

  In FIG. 1, reference numeral 10 indicates a vehicle air conditioner to which a dustproof cap according to an embodiment of the present invention is applied.

  As shown in FIG. 1, the vehicle air conditioner 10 includes a housing 12 that forms air passages therein, and an evaporator (cooling means) 14 that is disposed inside the housing 12 and cools the air. And a heater core (not shown) for heating the air.

  The housing 12 includes a first case 16 in which the evaporator 14 and the heater core are accommodated, and a second case 18 attached to a side portion of the evaporator 14.

  The first case 16 includes a face blowing unit 20 that blows the mixed air mixed in the first case 16 to the vicinity of the head of the passenger in the passenger compartment, and a vehicle windshield adjacent to the face blowing unit 20. A defroster blowing part 22 for blowing air in the vicinity and a foot blowing part 24 for blowing air in the vicinity of the occupant's feet in the passenger compartment are provided.

  Further, the main body portion 26 of the evaporator 14 formed in a substantially rectangular box shape is inserted into the first case 16 through an opening (not shown). The evaporator 14 extends from a side portion of the main body 26, and a refrigerant compressed by a compressor (for example, a compressor) disposed in an engine room (not shown) and a refrigerant after heat exchange are circulated and circulated. A set of pipes (passages) 28a, 28b and a connection block (connection part) 30 connected to the ends of the pipes 28a, 28b and connected to pipes (not shown) from the engine room side are provided. . The engine room side pipe is connected to a compressor or the like (not shown), and its end is integrally connected via a connecting portion. And the said connection part connects with the connection block 30 in the vehicle air conditioner 10, and a refrigerant | coolant circulates through the inside of piping through the said connection part and the connection block 30. FIG.

  That is, a high-pressure refrigerant compressed by a compressor (not shown) is introduced into the connection block 30 through one pipe (not shown) and a connection portion on the engine room side, and is made into a low-temperature / low-pressure mist by the expansion valve 32. After that, it is supplied to the main body portion 26 of the evaporator 14 through one pipe 28 a connected to the connection block 30. Then, after heat exchange with the air flowing in the housing 12 in the main body portion 26, the compressed air is supplied to the piping on the engine room side through the other piping 28b on the low pressure side and the connection block 30 again. Circulated to the machine.

  A part of the connection block 30 and the pipes 28a and 28b are accommodated in the second case 18, and the connection block 30 expands into a low-pressure mist by rapidly expanding a high-pressure refrigerant. A valve 32 is incorporated.

  1 to 6, the connection block 30 is formed in a substantially rectangular parallelepiped shape, and a pair of pipes 28a and 28b connected to the main body portion 26 are connected to each other at a predetermined interval on one end surface side thereof. At the other end surface side, a mounting surface (end surface) 34 (see FIG. 3) to which a connecting portion (not shown) connected via a pipe to a compressor or the like disposed on the engine room side is coupled. Have In addition, the attachment surface 34 of this connection block 30 is extended in the substantially vertical direction in the vehicle air conditioner 10, and is formed in planar shape.

  The connection block 30 is opened to the mounting surface 34 side, is supplied with a high-pressure refrigerant from a compressor (not shown), and is connected to one pipe 28 a and the first hole 36. And a second hole 38 through which a low-pressure refrigerant circulated from the main body 26 to the compressor is connected, and the first and second holes are spaced apart from each other by a predetermined distance in a substantially horizontal direction. A screw hole 42 (see FIG. 5) is formed between the portions 36 and 38, and a bolt (screw portion) 40 that connects the connection block 30 and the connection portion (not shown) is screwed therein. The first hole 36 is formed with a smaller diameter than the second hole 38.

  An expansion valve 32 that controls the pressure of the high-pressure refrigerant introduced into the first hole 36 is provided inside the connection block 30, and the expansion valve 32 protrudes from the side of the connection block 30. The pressure is controlled and supplied to the main body portion 26 of the evaporator 14 by displacing a valve portion (not shown) via the portion 44.

  The connection block 30 is formed so that the first hole 36 side is narrower than the second hole 38 side in correspondence with the difference in inner peripheral diameter between the first hole 36 and the second hole 38.

  As shown in FIG. 5, the bolt 40 is a long stud bolt formed in a shaft shape, and one end of the bolt 40 is screwed into the screw hole 42 and fixed to the connection block 30 via the nut 46. At the same time, the other end protrudes from the mounting surface 34 of the connection block 30 by a predetermined length.

  As shown in FIG. 1, the second case 18 is mounted from the side with respect to an opening (not shown) of the first case 16 to which the evaporator 14 is mounted, and the opening is the second case 18. It is blocked by. And a part of piping 28a and 28b which protruded from the side part of the evaporator 14, and the connection block 30 are accommodated in the inside. Further, the second case 18 faces an introduction passage 48 through which air is introduced from a blower fan (not shown) and a mounting surface 34 of the connection block 30 accommodated therein, at a position upstream of the evaporator 14. Thus, an opening hole 50 is formed. As shown in FIGS. 1 to 3, the opening hole 50 is formed in a long hole shape having an opening area slightly larger than the surface area of the mounting surface 34 in the connection block 30.

  Next, the dustproof cap 52 that is attached to the attachment surface 34 of the connection block 30 and closes the first and second hole portions (communication holes) 36 and 38 will be described.

  As shown in FIGS. 2 to 5, the dust cap 52 is made of a resin material having flexibility, and comes into contact with the mounting surface 34 of the connection block 30. 54 projecting in a cylindrical shape with respect to 54 and inserted into the first and second hole portions 36 and 38 of the connection block 30 respectively, and the body 54 It includes a hook portion 60 that is flexibly provided with respect to the end portion and that can be pulled by an operator when being detached from the connection block 30.

  The body 54 is formed in a plate shape. As shown in FIG. 4, the longitudinal dimension L1 of the body 54 is slightly smaller than the longitudinal dimension L2 of the mounting surface 34, and the body 54 is substantially orthogonal to the longitudinal dimension L1. The width dimension W1 is formed substantially equal to the width dimension W2 of the mounting surface 34 (W1≈W2). In addition, the thickness dimension of the body 54 and the hook part 60 is formed substantially equal (refer FIG. 5).

  As shown in FIGS. 5 and 6, the first and second fitting portions 56 and 58 are arranged at a predetermined interval in the longitudinal direction of the body 54, and the outer diameter of the first fitting portion 56 is set. A plurality of ribs 62 are formed on the outer peripheral surface of the first hole 36 so as to protrude radially outward. The ribs 62 are provided at equal angles along the outer peripheral surface of the first fitting portion 56.

  The second fitting portion 58 is formed at a position facing the second hole 38 in the connection block 30 when the first fitting portion 56 is inserted into the first hole 36. The inner diameter of the second hole 38 is substantially the same. A plurality of ribs 62 projecting radially outward are provided on the outer peripheral surface of the second fitting portion 58, and the ribs 62 are equiangular along the outer peripheral surface of the second fitting portion 58. They are spaced apart.

  That is, when the first and second fitting portions 56 and 58 are inserted into the first and second hole portions 36 and 38, the rib 62 is inserted into the first and second hole portions 36 and 38, respectively. Since it is displaced while sliding along the peripheral surface, the first and second fittings are provided via the rib 62 formed slightly larger than the inner peripheral diameter of the first and second hole portions 36 and 38. The mating portions 56 and 58 are fitted to the first and second hole portions 36 and 38.

  Further, as shown in FIGS. 2 and 4, an insertion hole 64 is formed at a position between the first fitting portion 56 and the second fitting portion 58 in the substantially central portion of the body 54. Bolts 40 and nuts 46 screwed into the screw holes 42 are inserted into the insertion holes 64. The diameter of the insertion hole 64 is set larger than the outer diameter of the bolt 40 and the nut 46 that fixes the bolt 40.

  On the other hand, one end of the body 54 where the second fitting portion 58 is provided is provided with a hook portion 60 via a pair of arm portions 66, and the hook portion 60 includes the hook portion 60, the arm portion 66, and the like. This is provided so as to be rotatable so as to approach the body 54 side from an upright state substantially orthogonal to the body 54 with the boundary portion as a fulcrum. The hook portion 60 can be rotated within a range of about 90 ° from the upright state (see FIG. 5) to a substantially horizontal state (see FIG. 6) overlapping the body 54. Moreover, the hook part 60 is formed in the substantially U-shaped cross section by which the substantially center part was notched into the rectangular shape.

  That is, the hook portion 60 is held in an upright state substantially orthogonal to the body 54 under a resilient action generated between the hook portion 60 and the body 54 at a normal time when no load is applied to the hook portion 60 ( 5), when a load directed to the body 54 side is applied to the hook portion 60, the hook portion 60 resists the elastic force of the hook portion 60 toward the body 54 side at a maximum of about 90 °. Only turn to a substantially horizontal state (see FIG. 6).

  Since the arm portion 66 is formed in a bifurcated shape so as to gradually widen in a direction away from one end portion of the body 54, the outer width dimension W3 of the hook portion 60 connected via the arm portion 66. The inner width dimension W4 is set larger than the width dimension W1 of the body 54 (W3, W4> W1). Thereby, when the hook part 60 rotates and overlaps the body 54 substantially in parallel, it is avoided that the hook part 60 and the body 54 overlap in the width direction (see FIG. 4).

  The other end portion side of the body 54 provided with the first fitting portion 56 is formed in a tapered shape gradually tapering toward the tip, and the end portion is formed in an arc shape. Thereby, in the substantially horizontal state in which the hook part 60 is rotated and overlapped with the body 54, the tip of the hook part 60 and the other end of the body 54 are avoided from overlapping each other.

  As a result, the dustproof cap 52 can prevent the body 54 and the hook portion 60 from overlapping in the longitudinal direction and the width direction when the hook portion 60 is rotated to be in a substantially parallel state with the body 54. It is formed into a shape. Therefore, when the hook part 60 is rotated to a substantially horizontal state, the dimension in the thickness direction of the dustproof cap 52 does not increase.

  Further, the length of the hook portion 60 is set so that the tip end portion thereof is located on the inner peripheral side from the opening hole 50 of the second case 18 when the hook portion 60 is rotated and substantially parallel to the body 54. It is set (see FIG. 4).

  The vehicle air conditioner 10 to which the dustproof cap 52 according to the embodiment of the present invention is applied is basically configured as described above. Next, the dustproof cap 52 is connected to the evaporator 14. A case where the second case 18 is assembled to the first case 16 after being attached to the block 30 will be described.

  First, with respect to the evaporator 14 in which the main body portion 26 is accommodated in the first case 16, a dustproof cap 52 is attached to the attachment surface 34 of the connection block 30. Specifically, the first and second fitting portions 56 and 58 of the dust-proof cap 52 are gripped so as to be on the mounting surface 34 side, and the first fitting portion 56 is inserted into the first hole portion 36 at the same time. The second fitting portion 58 is inserted into the second hole portion 38. At this time, the ribs 62 of the first and second fitting portions 56, 58 are inserted while sliding along the inner peripheral surfaces of the first and second hole portions 36, 38. The two fitting portions 56 and 58 are fitted into the first and second hole portions 36 and 38, and the removal of the dust cap 52 from the connection block 30 is prevented.

  In addition, by attaching the dustproof cap 52 to the connection block 30, it is possible to reliably prevent dust and the like from entering the evaporator 14 from the outside through the first and second holes 36 and 38.

  Next, the second case 18 is assembled to the first case 16 from the side on the connection block 30 side. In this case, the second case 18 is made to approach the first case 16 in a substantially horizontal direction so that the opening hole 50 is on the mounting surface 34 side of the connection block 30, and the opening of the first case 16 (see FIG. The end of the second case 18 is attached to the not-shown), and the connection block 30 and part of the pipes 28a and 28b are accommodated inside the second case 18.

  At this time, as the second case 18 approaches toward the first case 16, the inner wall surface 18 a in the vicinity of the opening hole 50 in the second case 18 is attached to the hook portion 60 as shown in FIG. 6. The hook 60 is displaced while being pressed toward the body 54 side. In other words, the hook portion 60 approaches the body 54 while gradually turning toward the body 54 side with the boundary portion with the arm portion 66 as a fulcrum, and becomes a substantially horizontal state substantially parallel to the body 54.

  Then, when the second case 18 is further displaced toward the first case 16 and the second case 18 is attached to the side of the first case 16, as shown in FIG. Since the length of the tip portion is set so as to be on the inner peripheral side from the opening hole 50 of the second case 18, the hook portion 60 is pressed downward by the inner wall surface 18 a of the second case 18. The hooked state 60 is released, and the hook portion 60 is rotated in a direction away from the body 54 under the elastic action. Thereby, the hook part 60 returns to the upright state substantially orthogonal to the body 54 through the opening hole 50.

  Finally, one end of the bolt 40 is screwed into the screw hole 42 through the insertion hole 64 of the dust-proof cap 52 and tightened with a nut 46, so that the bolt 40 is closer to the dust-proof cap 52 than the mounting surface 34. It is fixed in a protruding state. Also in this case, since the first and second holes 36 and 38 of the connection block 30 are reliably closed by the dust-proof cap 52, the dust generated when the bolt 40 is attached is prevented from entering. The

  Before connecting the connection block 30 with the dust cap 52 attached to the connection portion (not shown) connected to the compressor or the like on the engine room side, an operator (not shown) can connect the second case. The hook portion 60 protruding outward from the 18 opening holes 50 is gripped and pulled in a direction away from the connection block 30, so that the connection block 30 is connected to the connection block 30 via the first and second fitting portions 56 and 58. The fitted dustproof cap 52 is detached.

  A connecting portion (not shown) connected to a compressor or the like (not shown) via piping is brought into contact with the mounting surface 34 of the connection block 30 with respect to the mounting surface 34 from which the dust cap 52 has been removed. After the bolt 40 of the connection block 30 is inserted, it is connected by a tightening member, so that the evaporator 14 in the vehicle air conditioner 10 and the compressor disposed in the engine room are connected through the connection block 30 and the connection portion. Is done.

  As described above, in the first embodiment, the dust-proof cap 52 capable of closing the first and second holes 36 and 38 is attached to the mounting surface 34 of the connection block 30 in the evaporator 14, and the A pivotable hook portion 60 is provided on the body 54 of the dustproof cap 52, and after the second case 18 is assembled to the first case 16, the connection block 30 faces through the opening hole 50 of the second case 18 described above. The hook part 60 is protruded to the outside. As a result, the pair of first and second holes 36 and 38 in the connection block 30 can be simultaneously and simply closed by attaching the single dustproof cap 52, and the dustproof cap 52. Can be easily removed by pulling the hook portion 60.

  As a result, when the vehicle air conditioner 10 is connected to a connection portion connected to a compressor or the like in the engine room, the work time required to remove the dustproof cap 52 attached to the connection block 30 is reduced. Since it can be shortened and the dust-proof cap 52 can be attached until immediately before the connecting operation, the entry of dust and the like into the evaporator 14 can be prevented as much as possible.

  Further, even when the fastening bolt 40 protruding from the mounting surface 34 is attached to the connection block 30, the bolt 40 is provided by providing the dustproof cap 52 with the insertion hole 64 through which the bolt 40 can be inserted. Therefore, even in the connection block 30 including the bolt 40, the first and second hole portions 36 and 38 can be reliably closed by the dust-proof cap 52.

  Further, since the dustproof cap 52 is disposed close to the opening hole of the second case attached to the first case, the second case is brought close to the connection block to which the dustproof cap 52 is previously attached. When assembled to the first case, the hook portion 60 is pressed toward the body 54 by the second case 18 and rotated. At this time, the hook part 60 is formed with a longitudinal dimension and a width dimension that can be avoided without overlapping with the body 54, so the hook part 60 and the body 54 do not overlap in the thickness direction, An increase in the thickness of the dust cap 52 can be suppressed. Therefore, the deterioration of the assembling property due to the contact between the dustproof cap 52 and the second case 18 caused by the increase in the thickness of the dustproof cap 52 is prevented, and the first and second cases 16 and 18 are improved. Can be assembled.

  Furthermore, the length of the hook portion 60 is set so as to be inside the inner peripheral surface of the opening hole 50 of the second case 18 when the hook portion 60 rotates and becomes substantially parallel to the body 54. Therefore, when the second case 18 is mounted, the hook portion 60 is not pressed by the inner wall surface of the second case 18, and the opening portion 50 is formed under the elastic action of the hook portion 60. Thus, it can be suitably returned to an upright state substantially orthogonal to the body 54. Therefore, after attaching the second case 18, the hook portion 60 can be protruded to the outside of the opening hole 50 again, and the operator can use the hook portion 60 to connect the dustproof cap 52 from the connection block 30. It can be removed reliably and easily.

  Next, FIGS. 7 to 9 show a dustproof cap 100 used in the vehicle air conditioner 10 according to the second embodiment. The same components as those in the dustproof cap 52 according to the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the dustproof cap 100 according to the second embodiment, the first and second bent portions 104 and 106 are provided on the hook portion 102 connected to one end portion of the body 54, and the one end portion of the body 54 is provided. This is different from the dustproof cap 52 according to the first embodiment in that it is slightly offset toward the other end.

  In this dustproof cap 100, a hook portion 102 having a substantially U-shaped cross section is connected to one end portion of the body 54, and the hook portion 102 is directed toward the other end portion with a joint portion with the body 54 as a fulcrum. The first bent portion 104 (see FIG. 9) inclined by a predetermined angle and the first bent portion 104 are joined to the first bent portion 104 and bent in a substantially vertical direction as a boundary portion and a fulcrum of the first bent portion 104. And the second bent portion 106. That is, the second bent portion 106 is formed so as to be substantially orthogonal to the body 54.

  With such a configuration, when the hook portion 102 rotates and becomes substantially parallel to the body 54 (in FIG. 9, a two-dot chain line shape), the first bent portion 104 is joined to the body 54. And the second bent portion 106 is bent so as to be substantially parallel to the body 54.

  As described above, the lengths of the first and second bent portions 104 and 106 are arbitrarily adjusted in the hook portion 102, and the position of the boundary portion between the first bent portion 104 and the second bent portion 106 is determined. Thus, when the second case 18 is mounted so that the hook portion 102 rotates and is substantially parallel to the body 54, the tip position of the hook portion 102 can be adjusted to a desired position. Therefore, according to the position of the other end in the body 54, the shape and position of the inner peripheral surface of the opening hole 50 of the second case 18, the clearance between the inner wall surface of the second case 18 and the body 54, etc. And by changing the setting conditions (for example, length dimension) of the second bent parts 104 and 106, the hook part 102 and the body 54 part overlap each other in the thickness direction, and the thickness dimension of the dustproof cap 100 is changed. It is possible to reliably and easily prevent the increase.

  As shown in FIGS. 7 and 8, the hook portion 60 of the dustproof cap 52 according to the first embodiment is formed by making the tip of the hook portion 102 into an arc shape having a single radius. Compared to the second case 18, it is possible to further secure a separation distance from the inner peripheral surface of the opening hole 50, thereby more reliably preventing the second case 18 from being caught on the inner wall surface. After the second case 18 is mounted, the hook portion 102 can be protruded to the outside again through the opening hole 50.

  Next, a dustproof cap 120 used in the vehicle air conditioner 10 according to the third embodiment is shown in FIGS. The same components as those of the dustproof caps 52 and 100 according to the first and second embodiments described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the dustproof cap 120 according to the third embodiment, a cover member 126 that covers the bolt 40 inserted through the insertion hole 124 of the body 122 is integrally engaged with the body 122. This is different from the dustproof caps 52 and 100 according to the first and second embodiments.

  The dust cap 120 includes a pair of flange portions 128 protruding to the inner peripheral side of the insertion hole 124, and the flange portions 128 are provided at positions spaced apart from each other along the circumferential direction of the insertion hole 124. (See FIG. 13).

  Further, as shown in FIG. 12, the cover member 126 is formed in a bottomed cylindrical shape, and is attached so that one end thereof opened is on the bolt 40 side, and an annular ring is provided on the other end side. A portion 130 is formed. That is, for example, when the operator pulls the ring portion 130 away from the connection block 30, the dustproof cap 120 can be detached from the connection block 30 through the cover member 126.

  On the one end portion side of the cover member 126, first and second flange portions 132 and 134 protruding from the outer peripheral surface are provided. The first and second flanges 132 and 134 protrude in a radially outward direction by a predetermined length, and are provided in pairs at positions spaced apart by a predetermined distance along the circumferential direction of the outer peripheral surface.

  The first flange 132 is formed on substantially the same surface as one end of the cover member 126 inserted into the insertion hole 124, and the second flange 134 is formed on the cover member with respect to the first flange 132. 126 are formed at predetermined intervals in the axial direction of 126 (see FIG. 12).

  Then, as shown in FIG. 13, the cover member 126 is inserted into the insertion hole 124 so that the first flange 132 is between the flanges 128, and the first and second flanges 132, 134 are inserted into the flanges. The cover member 126 is rotated by a predetermined angle in a direction in which the cover member 126 is made to approach to 128. Thereby, the flange part 128 is inserted between the first collar part 132 and the second collar part 134, respectively, and the locking claw 138 (see FIG. 13) formed at the end of the second collar part 134 is the flange. Engage with the end of portion 128. That is, the separation distance between the first and second flange portions 132 and 134 is set to be approximately equal to or slightly larger than the thickness dimension of the flange portion 128.

  Thus, the rotational displacement of the cover member 126 with respect to the insertion hole 124 is restricted, and the flange portion 128 is engaged between the first and second flange portions 132, 134. The displacement of 126 in the axial direction is restricted. As a result, the cover member 126 is integrally attached to the body 122 through the insertion hole 124.

  With this configuration, when the bolt 40 is attached to the connection block 30, the bolt 40 protruding from the connection block 30 can be easily and reliably surrounded by the cover member 126. It is possible to prevent dust and the like from adhering to the threaded portion 40a engraved on the outer peripheral surface of the joint 40. Accordingly, the connecting block 30 is connected to the connecting portion (see FIG. When connecting to (not shown), the connecting operation can be performed smoothly.

  Further, the dustproof cap 120 can be detached from the connection block 30 integrally and simply via the ring portion 130 provided on the cover member 126. Therefore, it is possible to shorten the work time for connecting the vehicle air conditioner 10 and the connection portion connected to the compressor or the like via the connection block 30 via the piping.

  Further, the cover member 126 can be integrally attached to the body 122 by a simple assembling operation of rotating the cover member 126 by a predetermined angle with respect to the body 122 of the dustproof cap 120.

  Furthermore, when the cover member 126 is unnecessary, the cover member 126 can be used as the dust-proof cap 120 including the body 122 and the hook portion 60 without attaching the cover member 126 to the insertion hole 124 of the body 122. it can.

  The dust-proof cap used in the vehicle air-conditioning apparatus according to the present invention is not limited to the above-described embodiment, and can of course have various configurations without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Vehicle air conditioner 12 ... Housing 14 ... Evaporator 16 ... 1st case 18 ... 2nd case 26 ... Main-body part 28a, 28b ... Piping 30 ... Connection block 34 ... Mounting surface 36 ... 1st hole 38 ... 2nd hole Part 40 ... Bolt 42 ... Screw hole 50 ... Opening holes 52, 100, 120 ... Dustproof caps 54, 122 ... Body 56 ... First fitting part 58 ... Second fitting part 60, 102 ... Hook parts 64, 124 ... Insertion hole 104 ... 1st bent part 106 ... 2nd bent part 126 ... Cover member 128 ... Flange part 130 ... Ring part 132 ... 1st collar part 134 ... 2nd collar part

Claims (9)

In a vehicle air conditioner including an evaporator that cools air into a housing and supplies cold air,
The evaporator is connected to a set of passages for circulating the refrigerant, and is attached to a connection portion having a hole portion connected to and connected to the passage, and the hole portion opened at the end surface of the connection portion is closed. A dust cap used in a vehicle air conditioner,
The dust-proof cap has an insertion portion that is inserted into the hole portion, and a body that has an insertion hole that faces the bolt disposed in the connection portion and through which the bolt is inserted ,
A hook portion provided on the body and elastically joined using a joint portion with the body as a fulcrum;
With
The diameter of the insertion hole is set to be larger than the outer diameter of the bolt and the nut that fixes the bolt, and the hook portion is formed so as to be separated from the body in a free state, and is pressed to the body. A dustproof cap used in a vehicle air conditioner, wherein the cap can be folded by turning to the side . The dust-proof cap according to claim 1,
A pair of the insertion portions are provided corresponding to the hole portions, and the insertion hole is formed between the insertion portions. A dustproof cap used in a vehicle air conditioner. In the dustproof cap according to claim 1 or 2,
The housing is provided with an opening hole, and the hook portion is pressed by the inner wall of the housing toward the body side when the connection portion of the evaporator to which the dust cap is attached is attached to the housing. After the connection portion is mounted on the housing, the hole portion and the insertion hole are exposed from the opening hole, and the hook portion is separated from the body and outside the opening hole. A dustproof cap used in a vehicle air conditioner characterized by projecting into the air. In the dustproof cap according to claim 1 or 2 ,
The housing includes a first case in which the evaporator is accommodated, and a second case that is attached to a side portion of the first case and in which the connection portion is accommodated.
The second case is provided with an opening, and the evaporator, to which the dust cap is attached, is stored in the first case, and the connection portion protruding from the first case is stored in the second case. When the second case is moved to the first case side, the hook portion is pressed by the inner wall of the second case to rotate toward the body side, and the first case by the second case is attached and, together with the insertion hole and the hole is exposed from the opening hole, the hook portion is spaced from the body, that project to the outside from the openings A dustproof cap for use in a vehicle air conditioner. In the dustproof cap according to any one of claims 1 to 4,
In the hook portion, a first bent portion provided on the joining site side,
A second bent portion extending from the first bent portion toward the distal end side and bent in a direction away from the body;
With
The dust-proof cap used in an air conditioner for vehicles, wherein the second bent portion is disposed outside the opening of the housing . In the dustproof cap according to any one of claims 1 to 5,
The dust-proof cap used in a vehicle air-conditioning apparatus, wherein the insertion portion is formed to protrude in a cylindrical shape from a body that abuts the connection portion . In a vehicle air conditioner including an evaporator that cools air into a housing and supplies cold air,
The evaporator is connected to a set of passages for circulating the refrigerant, and is attached to a connection portion having a hole portion connected to and connected to the passage, and the hole portion opened at the end surface of the connection portion is closed. A dust cap used in a vehicle air conditioner,
The dust-proof cap includes a body having an insertion portion to be inserted into the hole portion, and an insertion hole through which the bolt is inserted so as to face the bolt disposed in the connection portion, and the diameter of the insertion hole is The outer diameter of the bolt and the nut for fixing the bolt is set larger than the outer peripheral surface of the insertion portion, and a rib projecting radially outward is provided on the outer peripheral surface of the insertion portion, and fitted into the hole portion through the rib. A dustproof cap for use in a vehicle air conditioner characterized by being combined . In the dustproof cap according to any one of claims 1 to 7 ,
Said body, said detachably provided with respect to the insertion hole, the insertion hole and the dust-proof caps used in an air conditioning system for vehicles, wherein the cover member covering the bolt is al provided. The dustproof cap according to claim 8,
An end portion of the cover member is formed with a flange portion protruding radially outward from an outer peripheral surface, and the flange portion is engaged with a flange portion formed in the insertion hole. A dustproof cap used in air conditioners.

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