JP6384617B2 - Case unit - Google Patents

Description

Cross-reference to related applications

  This application is based on Japanese Patent Application No. 2015-168146 filed on August 27, 2015, the description of which is incorporated herein by reference.

  The present disclosure relates to a case unit having a case having an opening and a closing member attached to the opening of the case.

  The vehicle air conditioner is provided with a control component (that is, an electrical component) having a blower control resistor and the like. As a structure for attaching such a control component to a case of an air conditioner, there is a structure in which the control component is inserted into a notch provided on the attachment surface of the case and then the control component is translated to be attached to the case.

  For example, Patent Document 1 describes that a control component side protrusion is inserted into a notch provided on a mounting surface of a case and then the control component is rotated and attached.

JP 2012-188089 A

  In the vehicle air conditioner as described above, since the pressure inside the case becomes higher than the atmospheric pressure outside the case when the blower is operated, the air inside the case is outside the case from the gap generated between the mounting surface of the case and the control component. To leak.

  For this reason, in the vehicle air conditioner, the control component is pressure-bonded to the mounting surface of the case. However, when the load at the time of crimping is increased, the operator needs to perform the crimping operation with a very strong force, so that the assembling property is lowered.

  Moreover, if the load at the time of crimping is weakened, the assembling property is improved, but the sealing property is lowered, so that the air conditioning performance is lowered or abnormal noise is generated.

  Moreover, in such a vehicle air conditioner, if the dimensional variation of the case having an opening or the closing member that closes the opening of the case is large, the sealing property is lowered or the assembling property is lowered.

  For this reason, when manufacturing a case or a closure member, high dimensional accuracy is required. For example, a high level technique is required in which the molds for manufacturing the case and the closing member are aligned with a dimensional accuracy of 0.05 millimeter level. For this reason, cost will become high.

  An object of the present disclosure is to achieve both a reduction in force required when assembling a closing member to a case and securing a sealing property between the case and the closing member without requiring high dimensional accuracy.

  According to one aspect of the present disclosure, the case unit includes a case that has an opening and allows air to flow therein, and a closing member that is attached to the opening. The closing member closes the opening. And a clamping claw portion that is formed so as to protrude to one surface side of the main body portion and clamps an opening edge portion around the opening portion between the main body portion, and the opening edge portion is It has a clamped portion that is clamped by the main body and the clamping claw. Further, the sandwiched portion is formed with a notch at the opening side end on the surface facing the main body, and the surface facing the sandwiching claw portion of the sandwiched portion is in contact with the sandwiching claw portion, Of the surface of the portion facing the body portion, the outer peripheral side of the notch portion is in contact with the body portion, and a space is formed between the portion where the notch portion is formed and the body portion.

  According to such a configuration, the sandwiched portion is formed with a notch at the opening side end on the surface facing the main body, and the surface facing the sandwiching claw portion in the sandwiched portion is the sandwiching claw portion. Of the surface of the sandwiched portion that faces the main body portion, the outer peripheral side of the notch portion is in contact with the main body portion, and a space is formed between the portion where the notch portion is formed and the main body portion. Therefore, the portion where the notch portion is formed in the sandwiched portion is elastically deformed, and the pressing force applied to this portion is released to the notch portion side, so that when the closing member is assembled to the case without requiring high dimensional accuracy It is possible to reduce the force required for the operation. In addition, the portion where the notch portion is formed in the sandwiched portion is elastically deformed, and an appropriate crimping force is generated between the portion and the opening edge around the opening portion, so that the sealing property between the case and the closing member is improved. It can also be secured.

According to another aspect, the case unit includes a case having an opening, and a closing member attached to the opening and closing the opening. The closing member is a first locking portion. The case includes a second locking portion formed at the opening edge, and the contact surface between the closing member and the opening edge around the opening of the case has the first A pressing force that presses the contact surface is generated by mutual locking of the first locking portion and the second locking portion, and one of the first locking portion and the second locking portion. Includes a sandwiching portion, the other of the first latching portion and the second latching portion being different from the one includes a sandwiched portion, and the sandwiched portion is sandwiched by the sandwiching portion. In the portion where the closing member closes the opening of the case and is sandwiched by the sandwiched portion of the sandwiched portion, A portion (21b) is formed, and the thin portion is thinner than other portions sandwiched by the sandwiched portion of the sandwiched portion, and the thin portion is sandwiched by the sandwiched portion. As a result, the thin portion is elastically deformed, and a pressing force pressing the contact surface is generated.

It is an external view of the indoor air-conditioning unit which concerns on 1st Embodiment. It is an external appearance perspective view of an opening part. It is the figure which looked at the opening part from the ZZ direction of FIG. It is an external appearance perspective view of a controller. It is the figure which looked at the controller from the XX direction of FIG. It is the figure which looked at the controller from the YY direction of FIG. It is explanatory drawing which shows the initial state at the time of attaching a controller to a case. It is explanatory drawing which shows the state which moved the controller to the insertion position when attaching a controller to a case. It is explanatory drawing which shows the state which moved the controller to the fixed position when attaching a controller to a case. It is the figure which showed the shape of the nail | claw part for clamping before attaching a controller to a case, and a thin part. It is XI-XI sectional drawing of FIG. It is the S section enlarged view of FIG. It is the figure which looked at the case and the controller from the C direction of FIG. It is XIV-XIV sectional drawing in FIG. It is the T section enlarged view in FIG. It is the figure which showed the comparative example by which the thin part is not formed in the case, Comprising: It is a figure corresponding to FIG. It is the figure which showed the comparative example by which the thin part is not formed in the case, Comprising: It is a figure corresponding to FIG. It is a figure which shows the relationship between a wind leak and assembly | attachment force. It is an external view of the controller of an auto specification. Used in so-called auto air conditioners.

  Hereinafter, a first embodiment of the present disclosure will be described with reference to the drawings. The case unit of this embodiment is described as a blower motor case (hereinafter simply referred to as a case) 2 of the indoor air conditioning unit 1 of the vehicle air conditioner and a blower motor controller (hereinafter simply referred to as a controller) corresponding to a closing member. ) 30. The blower motor controller 30 corresponds to a closing member.

  The indoor air conditioning unit 1 takes in internal air (that is, air in the vehicle interior) or outside air (that is, air outside the vehicle interior), adjusts the temperature of the taken-in air, and blows it out into the vehicle interior. More specifically, the indoor air conditioning unit 1 is arranged inside the instrument panel (i.e., the instrument panel) at the foremost part of the vehicle interior, and various air conditioning devices that adjust the temperature of the air blown into the vehicle interior, It is configured to be accommodated in the case 2.

  Accordingly, the case 2 forms an air passage through which air blown into the vehicle compartment is circulated. Further, in the present embodiment, the case 2 is made of a resin (for example, polypropylene) having a certain degree of elasticity and excellent strength. The case 2 has an electric motor (blower motor) of an electric blower disposed therein.

  As shown in the external perspective view of FIG. 1, the indoor air-conditioning unit 1 is largely divided into an air-conditioning main body unit 3 arranged at the approximate center of the left and right sides of the vehicle and a blower unit 4 arranged closer to the passenger seat than the air-conditioning main body unit 3. Separated. In addition, the up and down arrows in FIG. 1 indicate the up and down directions when the indoor air conditioning unit 1 is mounted on the vehicle.

  On the most upstream side of the air flow of the blower unit 4, an inside / outside air switching device 5 for switching and introducing inside air or outside air into the indoor air conditioning unit 1 is arranged. Further, on the lower side of the inside / outside air switching device 5 and inside the blower unit 4, there is an electric blower (not shown) that sucks inside air or outside air introduced from the inside / outside air switching device 5 and blows it toward the vehicle interior. Contained.

  An opening 20 that penetrates the inside and outside of the case 2 is provided in a V portion of the lower portion of the blower unit 4 in the case 2. As shown in FIG. 1, the opening 20 is closed by attaching a controller 30 to the case 2.

  Inside the air conditioning main unit 3, various air conditioners such as a cooling heat exchanger (not shown) for cooling the blown air blown from the blower unit 4, a heating heat exchanger for heating the blown air, and an air mix door Household equipment is housed.

  The cooling heat exchanger is an evaporator of a vapor compression refrigeration cycle apparatus that exchanges heat between blown air and a low-pressure refrigerant to evaporate the low-pressure refrigerant. The heating heat exchanger is a heater core that heats blown air by exchanging heat between cooling water and blown air of a vehicle running engine. The air mix door is a temperature adjusting unit that adjusts the temperature of the blown air blown into the vehicle interior by adjusting the amount of blown air passing through the heat exchanger for heating.

  Furthermore, a plurality of outlets 6 are provided on the most downstream side of the air flow of the air conditioning main unit 3 so that the temperature-adjusted blown air flows out to the vehicle interior side. The blown air that has flowed out of these outlets is guided to a blowout port provided in the vehicle interior via a duct (not shown) and blown out from the blowout port into the vehicle interior.

  Next, a detailed configuration of the opening 20 provided in the case 2 will be described with reference to FIGS. 2 and 3. In addition, in FIG. 2, the external appearance of the opening part 20 seen from the direction different from FIG. 1 is shown for clarification of illustration. 2 and the subsequent drawings, the direction perpendicular to the plane on which the opening 20 is formed is the Z-axis direction, the predetermined direction parallel to the plane on which the opening 20 is formed is the X-axis direction, and the Z-axis and The direction perpendicular to the X axis is taken as the Y axis direction.

  First, as shown in FIGS. 2 and 3, the opening 20 of the present embodiment is formed in a quadrangular shape when viewed from the Z-axis direction. Furthermore, the opening 20 in the present embodiment is provided with four notches 20a formed by notching the peripheral edge of the opening.

  Further, in the vicinity of the opening 20, a recess 20 b formed by denting the surface of the case 2 is provided.

  More specifically, the recess 20b is formed in the vicinity of one side extending in the X-axis direction among the four sides forming the opening 20, and the opening 20 when the controller 30 is attached to the case 2 This is a mark indicating the positional relationship with the controller 30.

  The notch 20a is formed at two locations on each of two sides extending in the Y-axis direction (that is, two sides arranged opposite to each other with the side on the recess 20b side). When the controller 30 is attached to the case 2, these recesses 20b form a space into which a clamping claw portion 31b of the controller 30 described later is inserted. In addition, projecting portions 20c and 20d are formed around the opening portion 20 so as to project toward the main body portion 31 side of the controller 30 described later.

  In this embodiment, the notch part 21a is formed in the edge part of the Y-axis direction side of each notch part 20a, respectively. Each cutout portion 21 a is formed so as to cut out the surface side of the case 2. Each notch 21a forms a thin portion 21b at the end of each notch 20a on the Y-axis direction side.

  The opening edge around the opening 20 has a sandwiched portion 21 that is sandwiched between the main body 31 of the controller 30 and the clamping claw 31b. The to-be-clamped part 21 is comprised by the notch part 21a and the thin part 21b.

  Next, the detailed configuration of the controller 30 will be described with reference to FIGS. 4, 5, 6, 7, and 8. 4 shows the external appearance of the controller 30 as viewed from the same direction as FIG. The indoor air conditioning unit 1 is provided with two types of controllers 30 of manual specification and auto specification. The manual specification controller 30 is used for a so-called manual air conditioner, and the auto specification controller 30 is used for a so-called auto air conditioner. Note that the controller 30 of the present embodiment has a manual specification. The controller 30 of the present embodiment adjusts the amount of power supplied to the electric motor of the electric blower housed in the blower unit 4 in four stages.

  The controller 30 includes a plate-shaped main body 31 that closes the opening 20 of the case 2, and an opening edge around the opening 20 between the main body 31 and the main body 31. And a claw portion 31b for clamping.

  The controller 30 includes a circuit element such as a resistor (that is, an electric energy control component) 32, a power transistor (not shown), and a lead fuse (not shown). The resistor 32 is a register that adjusts the amount of power supplied to the electric motor of the electric blower housed in the blower unit 4. The power transistor drives an electric motor of the electric blower. The lead fuse prevents an overcurrent from flowing through the electric motor of the electric blower. The circuit components provided in the controller 30 are accommodated in the case 2 and cooled by the air flowing through the case 2.

  The main body 31 is a flat plate member that extends parallel to the surface of the case 2 on which the opening 20 is formed, and is formed in the same rectangular shape as the opening 20 when viewed from the Z-axis direction. The body portion 31 and the body portion of the connector 33 are integrally formed of the same material as that of the case 2.

  The body portion 31 and the body portion of the connector 33 of the present embodiment are made of phenol resin (ie, PF material). The manual controller 30 employs a phenolic material that is excellent in heat resistance even if the mold cost is high because the temperature rises from 450 ° C. to 550 ° C.

  The connector 33 is formed on the surface of the main body 31 opposite to the case 2, and the resistor 32 is attached to the surface of the main body 31 on the case 2 side.

  Further, the main body 31 is formed with a semicircular portion 31a, a clamping claw portion 31b, an outer edge portion 31e, and the like.

  The semicircular portion 31a serves as a mark indicating the positional relationship between the opening 20 and the controller 30 when the controller 30 is attached to the case 2, and forms a rectangular main body 31 as shown in FIG. Of the four sides, one side extends in the X-axis direction. Further, the semicircular portion 31 a is formed in a shape protruding in the Y-axis direction so as to overlap with the concave portion 20 b of the case 2 when the controller 30 is attached to the case 2.

  The clamping claw portion 31b is for clamping the opening edge portion around the opening portion 20, and is disposed on the inner surface (surface on the resistor 32 side) of the main body portion 31. More specifically, the clamping claw portion 31b has an L-shaped cross section, and opens to the outer peripheral side of the main body portion 31 between the main body portion 31 and the clamping claw portion 31b. A space for sandwiching the edge portion is formed.

  Furthermore, the same number of nail portions 31b for clamping as the cutout portions 20a of the opening 20 (four in this embodiment) are formed. Each nail | claw part 31b for clamping is formed in the position corresponding to each notch part 20a, as shown in FIG. 7, when it sees from a Z-axis direction. That is, each clamping claw portion 31b is arranged so that it can be simultaneously inserted into the corresponding cutout portion 20a when the controller 30 is attached to the case 2.

  As shown in FIGS. 4, 5, 6, and the like, the outer edge portion 31 e is formed on the outer peripheral side of three rectangular sides formed by the main body portion 31, and when the controller 30 is attached to the case 2. These are disposed so as to cover the tip of the side projection 20c described above.

  Next, an attaching process when attaching the controller 30 to the case 2 will be described with reference to FIGS. First, the controller 30 is displaced in the Z-axis direction from the outside of the case 2 as shown by a thick solid arrow in FIG. 7, and the resistor 30 side of the controller 30 is placed inside the opening 20 as shown in FIG. Insert. This process is an insertion process.

  At this time, in this embodiment, the controller 30 is arranged so that the side of the main body 31 on the semicircular portion 31a side and the side of the opening 20 on the concave portion 20b side are the same side. Thereby, the nail | claw part 31b for clamping of the main-body part 31 can be arrange | positioned in the notch part 20a of the corresponding opening part 20, respectively. That is, in the insertion process, the controller 30 is arranged at the insertion position.

  Subsequently, the controller 30 positioned at the insertion position is displaced in the Y-axis direction as shown by a thick solid arrow in FIG. 8, and the semicircular portion 31a of the main body 31 is placed in the case as shown in FIG. The second recess 20b is polymerized. This is a fixed stroke. As a result, the opening edge around the opening 20 is sandwiched in the gap between the holding claw 31 b and the main body 31, and the controller 30 is fixed to the case 2. That is, in the fixed stroke, the controller 30 is displaced to the fixed position.

  As described above, the case unit of the present embodiment attaches the controller 30 to the case 2 by displacing the controller 30 from the insertion position to the fixed position.

  Here, when the opening 20 provided in the case 2 of the indoor air conditioning unit 1 is closed by the controller 30 as in the present embodiment, efficient air conditioning is achieved and noise caused by air leakage is suppressed. Therefore, it is desirable to appropriately attach the controller 30 to the case 2 so that air does not leak from the gap between the case 2 and the controller 30.

  Further, when the opening 20 provided in the case 2 of the indoor air conditioning unit 1 is closed by the controller 30, the controller 30 is appropriately attached to the case 2 without requiring a strong force in order to improve the assembling property. It is desirable to install.

  Therefore, in the case unit of the present embodiment, a thin portion 21 b is formed in the sandwiched portion 21 around the opening 20 of the case 2. Specifically, a thin portion 21b is formed at the end of each notch 20a on the Y-axis direction side.

  FIG. 10 is a diagram illustrating the shapes of the thin portion 21b and the clamping claw portion 31b before the controller 30 is displaced from the insertion position to the fixed position. As shown in the figure, when the controller 30 is in the insertion position, the thin portion 21b and the clamping claw portion 31b are not elastically deformed.

The thickness of the sandwiched portion 21 of the case 2 is t ₀ , and the distance between two opposing surfaces of the main body portion 31 and the clamping claw portion 31 b of the controller 30 is t ₁ . When t ₀ > t ₁ , the sealing property is improved, but the assembling property is lowered. On the other hand, when t ₀ <t ₁ , the assembling property is improved but the sealing property is lowered.

  Here, the nail | claw part 31b for clamping which contact | abuts to the thin part 21b from the thickness direction one side of the to-be-clamped part 21 respond | corresponds to a 1st part. Further, the main body portion 31 that comes into contact with a portion other than the thin portion 21b of the sandwiched portion 21 from the other side in the thickness direction of the sandwiched portion 21 corresponds to the second portion.

When t ₀ > t ₁ , in the state where the sandwiched portion 21 is not sandwiched between the first portion and the second portion, the interval t ₁ between the first portion and the second portion in the thickness direction is the sandwiched portion 21. It is smaller than the thickness t ₀ in the thickness direction of the part other than the thin part 21b.

  FIG. 11 is a diagram showing the shape of the clamping claw portion and the thin portion 21b after the controller is assembled to the case. FIG. 12 is an enlarged view of the S part in FIG. 13 is a view as seen from the direction C in FIG. 9, and FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. FIG. 15 is an enlarged view of a T portion in FIG.

  When the controller 30 is displaced from the insertion position to the fixed position, as shown in FIGS. 12 and 15, the thinned portion 21 b formed at the opening edge around the case 2 is separated from the clamping claw portion 31 b of the controller 30 and the main body portion. 31 is inserted.

  Here, in the sandwiched portion 21, a notch portion 21 a is formed at an end portion on the opening 20 side on a surface facing the main body portion 31 of the controller 30. The surface of the sandwiched portion 21 that faces the clamping claw portion 31b is in contact with the clamping claw portion 31b. Of the surface of the sandwiched portion 21 that faces the body portion 31, the outer peripheral side of the notched portion 21a is the body portion. A space is formed between the body portion 31 and the portion where the cutout portion 21 a is formed in contact with the body 31. For this reason, the thin part 21b is elastically deformed to the notch part 21a side, and the pressing force applied to the thin part 21b is released to the notch part 21a side.

  In this way, the thin portion 21b is elastically deformed and the pressing force applied to the thin portion 21b is released to the cutout portion 21a side. Therefore, the dimensional variation of the case 2 having the opening 20 and the controller 30 that closes the opening 20 of the case 2 is eliminated. Even if is slightly larger, the deterioration of the assemblability can be alleviated.

  Moreover, since the thin part 21b is elastically deformed and an appropriate crimping force is generated between the thin part 21b and the opening edge around the opening 20 of the case 2, the sealing performance between the controller 30 and the case 2 is ensured. You can also.

  In addition, the contact surface between the blower motor controller 30 and the opening edge portion is formed with a joint portion that generates a pressing force that presses the contact surface by mutual engagement between the sandwiching portion and the sandwiched portion 21. Yes. Here, the clamping part is comprised from the main-body part 31 and the nail | claw part 31b for clamping.

  Further, a thin portion 21 b is formed in a portion of the sandwiched portion 21 that is sandwiched between the sandwiched portions. The thin portion 21b is thinner than the other portions sandwiched by the sandwiching portion of the sandwiched portion 21. And the thin part 21b deform | transforms by the thin part 21b being clamped by the clamping part. Thus, a pressing force that presses the contact surfaces of the sandwiched portion and the sandwiched portion 21 is generated by the mutual engagement between the sandwiching portion and the sandwiched portion 21. The portion where the pressing force is generated is a joint portion.

  FIG. 16 is a diagram illustrating a comparative example in which the thinned portion 21b is not formed in the sandwiched portion 21 of the case 2, and corresponds to FIG. FIG. 17 is a diagram illustrating a state in which the controller 30 is assembled in the comparative example in which the thinned portion 21b is not formed in the sandwiched portion 21, and corresponds to FIG.

When the thickness of the sandwiched portion 21 of the case 2 is t ₀ and the distance between two opposing surfaces of the main body 31 of the controller 30 and the sandwiching claw portion 31b is t ₁ , t ₀ > t ₁ The sealability is improved, but the assemblability is lowered. On the other hand, when t ₀ <t ₁ , the assembling property is improved, but the sealing property is lowered.

FIG. 18 shows the wind velocity of the wind leak when the thickness t ₀ of the sandwiched portion 21 and the dimension of the distance t ₁ between the two opposing surfaces of the main body 31 and the sandwiching claw 31 b of the controller 30 are changed. It is the figure which graphed the relationship between x and the assembly | attachment force y. (A) is the figure which graphed the relationship between the wind speed x of the wind leak of the comparative example shown in FIG. 16, and the assembly | attachment force y, (b) is the wind speed x of the wind leak of this indication shown in FIG. It is the figure which showed the relationship between and assembly | attachment force y.

In the configuration like the comparative example shown in FIG. 16, the thickness t ₀ of the sandwiched portion 21 and the distance t ₁ between the two opposing surfaces of the main body portion 31 and the clamping claw portion 31 b of the controller 30 are set. If even a slight variation occurs, the wind speed and assembly force of the wind leak will not meet the standard value.

For example, when t ₀ > t ₁ , over-compression occurs, and the assembly force exceeds a standard value (for example, 50 newtons). On the other hand, when t ₀ <t ₁ , the pressure-bonding force is insufficient, the sealing performance is deteriorated, the air-conditioning performance is deteriorated, and noise due to wind leakage or rattling is generated.

In addition, the main body 31 and the body of the connector 33 of the present embodiment are made of phenol resin (that is, PF material). Phenolic resins are hard and brittle. For this reason, when t ₀ > t ₁ , over-compression occurs, and the folding claw portion 31b is likely to be broken.

  As a result, the dimensional tolerance of a general resin is about ± 0.25 millimeter, whereas the configuration like the comparative example shown in FIG. 16 requires a dimensional tolerance of about ± 0.05 millimeter. .

On the other hand, in the configuration like the present disclosure shown in FIG. 10, the thin portion 21 b is formed in the sandwiched portion 21 around the opening 20 of the case 2. To serve the thin portion 21b is spring, the thickness t ₀ of the clamped portion 21, somewhat on the size of the distance t ₁ of the two surfaces facing each other of the main body portion 31 and the clamping claw portion 31b of the controller 30 Even if the variation occurs, an appropriate pressure-bonding force can be applied to the seal surface. Therefore, it is possible to prevent the air conditioning performance from being deteriorated or the occurrence of abnormal noise due to wind leakage or rattling. In addition, the assembling force is relaxed, and the assembling force can be within the standard value.

  As a result, the dimension crossing required at the time of manufacturing can be reduced to about ± 0.25 mm, which is equivalent to that of general resin, and the manufacturing cost can be reduced.

  According to the configuration described above, the notched portion 21 a is formed at the opening-side end portion of the surface opposed to the main body portion 31 in the sandwiched portion 21 sandwiched between the main body portion 31 and the clamping claw portion 31 b. Furthermore, the surface of the sandwiched portion 21 that faces the clamping claw portion 31b abuts on the clamping claw portion 31b. Of the surface of the sandwiched portion 21 that faces the main body portion 31, the outer peripheral side of the notched portion 21 a contacts the main body portion 31. A space is formed between the portion where the notch 21 a is formed and the main body 31.

  According to such a configuration, the notched portion 21 a is formed in the sandwiched portion 21 at the opening 20 side end portion on the surface facing the main body portion 31. The surface of the sandwiched portion 21 that faces the sandwiching claw portion 31b contacts the sandwiching claw portion 31b. Of the surface of the sandwiched portion 21 that faces the main body portion 31, the outer peripheral side of the notch portion 21 a abuts on the main body portion 31, and a space is formed between the main body portion 31 and the portion where the notch portion 21 a is formed. ing. Accordingly, the portion of the sandwiched portion 21 where the cutout portion 21a is formed is elastically deformed, and the pressing force applied to this portion is released to the cutout portion 21a side. Therefore, the force required when assembling the controller 30 to the case 2 can be reduced without requiring high dimensional accuracy. Further, the portion of the sandwiched portion 21 where the notch 21 a is formed is elastically deformed, and an appropriate pressure-bonding force is generated between this portion and the opening edge around the opening 20. Therefore, the sealing property between the case 2 and the controller 30 can be ensured.

(Second Embodiment)
In the first embodiment, an example in which the manual specification controller 30 is attached to the case 2 has been described. However, the present embodiment is different in that the auto specification controller 30 is attached to the case 2.

  FIG. 19 shows an external view of the auto-specific controller 30. The auto specification controller 30 is different from the manual specification controller 30 of the first embodiment in that it includes the radiation fins 35, and the circuit configuration and the body portion of the main body 31 and the connector 33 are different.

  The controller 30 of this embodiment adjusts the electric energy supplied to the electric motor of the electric blower accommodated in the blower unit 4 in 10 steps.

  The controller 30 includes a main body 31 that covers and closes the opening 20 when attached to the case 2, a connector 33 to which electrical wiring is connected, and the like. The controller 30 also includes a register that adjusts the power supplied to the electric motor of the electric blower, a power transistor that drives the electric motor of the electric blower, a temperature fuse that cuts off the current flowing through the electric motor of the electric blower, and the like. Yes. The resistor, power transistor, and thermal fuse are not shown.

  The body portion 31 of the present embodiment and the body portion of the connector 33 are made of polybutylene terephthalate resin (that is, PBT material). The temperature of the controller 30 of the auto specification as in the present embodiment increases from 300 ° C to 400 ° C. However, it is about 200 ° C. lower than the manual specification controller 30 of the first embodiment.

  That is, the auto-specific controller 30 as in the present embodiment is not required to be as heat resistant as the manual-specific controller 30 in the first embodiment. For this reason, the main-body part 31 of the controller 30 of this embodiment and the trunk | drum part of the connector 33 are comprised by the PBT material.

  The auto controller 30 as in the present embodiment can be attached to the opening 20 of the case 2 in the same manner as the manual controller 30 in the first embodiment.

  By the way, one of the causes that the assemblability when the controller 30 is assembled to the case 2 in the vehicle air conditioner is deteriorated is the material property of the PF material. The PF material is excellent in heat resistance, but has a characteristic that it is brittle and hardly elastically deforms. Specifically, the flexural modulus of the PF material is about twice that of the PBT material and is not easily deformed.

  Therefore, the present inventor has studied to adopt nylon (that is, PA material) as a material of the main body portion 31 of the controller 30 as a material having excellent heat resistance and a low elastic modulus.

  The inventor configured the controller 30 using the PF material and the controller 30 using the PA material with the same dimensional tolerance as in the first embodiment, and assembled each controller 30 to the opening 20 of the case 2 and assembled. The sex was confirmed. As a result, the assembling force of the controller 30 made of the PF material was 75 Newton, whereas the assembling force of the controller 30 made of the PA material was 38 Newton. That is, it was confirmed that the controller 30 made of the PA material achieves better assembly than the controller 30 made of the PF material. However, since the PA material has problems such as a large amount of dimensional change, adjustments such as reducing the amount of dimensional change may be performed in order to achieve both assembling and sealing properties.

  In this embodiment, the effect produced from the configuration common to the first embodiment can be obtained in the same manner as in the first embodiment.

(Other embodiments)
(1) In each of the above embodiments, the case unit of the present disclosure is applied to the blower motor case (hereinafter simply referred to as a case) 2 of the indoor air conditioning unit 1 of the vehicle air conditioner. However, the application target of the case unit is not limited to the blower motor case of the indoor air conditioning unit 1. For example, the opening provided in the case 2 may be an opening used when performing maintenance of an air conditioner housed inside. The closing member may be a simple cover. Furthermore, the case unit of the present disclosure can also be applied to each case unit including the case 2 that has the opening 20 and allows air to flow inside, and the closing member that is attached to the opening 20.

  (2) In each of the above embodiments, the main body 31 of the controller 30 is configured using a PF material, a PBT material, and a PA material. However, the material of the main body 31 is not limited to these materials.

  (3) In the above embodiment, the notch portion 21a is formed at the end of the notch portion 20a on the Y-axis direction side to form the thin portion 21b. However, it is also possible to change the dimension of the thin portion 21b in the thickness direction so that the cross-sectional secondary moment is the same in each portion of the thin portion 21b. Thereby, for example, even when there is a change in the resin physical properties of the case or the controller, it is possible to maintain the sealing property and the assembling property.

  (4) In the above embodiment, the clamping claw portion 31 b is formed integrally with the main body portion 31, and the sandwiched portion 21 is formed at the opening edge that contacts the main body portion 31 around the opening portion 20. The sandwiched portion 21 is also a sandwiched claw portion. In this case, the clamping claw portion 31b is the first locking portion. And the to-be-clamped part 21 is a 2nd latching | locking part.

  However, for example, the sandwiched portion may be formed integrally with the main body portion 31, and the claw portion for clamping may be formed at the opening edge portion that contacts the main body portion 31 around the opening portion 20. The sandwiched portion in this case is also a sandwiched claw portion. In this case, the sandwiched portion integrally with the main body portion 31 is the first locking portion. And the nail | claw part for clamping formed in the opening edge part is a 2nd latching | locking part.

  Note that the present disclosure is not limited to the above-described embodiment, and can be modified as appropriate. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily indispensable except for the case where it is clearly indicated that the element is essential and the case where the element is clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case.

Claims (6)

A case (2) having an opening (20) and circulating air therein;
A closure member (30) attached to the opening,
The closing member is formed so as to protrude from a plate-like main body (31) that closes the opening and to one surface side of the main body, and an opening edge around the opening is formed between the main body and the opening. A clamping claw portion (31b) clamped by
The opening edge portion has a sandwiched portion (21) sandwiched between the main body portion and the sandwiching claw portion,
In the sandwiched portion, a notch (21a) is formed at the opening side end portion on the surface facing the main body portion,
A surface of the sandwiched portion that faces the sandwiching claw portion is in contact with the sandwiching claw portion, and of the surface of the sandwiched portion that faces the body portion, the outer peripheral side of the notched portion is the body portion. A case unit in which a space is formed between the abutment portion and the main body portion where the cutout portion is formed. A blower motor which is disposed inside the case and drives a blower for circulating air inside the case;
The case unit according to claim 1, wherein the closing member includes a control component that controls the blower motor. The control component includes at least one circuit component including a power amount control component that adjusts the amount of power supplied to the blower motor, a transistor that supplies power to the blower motor, and a fuse that prevents an overcurrent from flowing through the blower motor. And
The case unit according to claim 2, wherein the circuit component is disposed in the case.   The case unit according to any one of claims 1 to 3, wherein a material of the closing member is polybutylene terephthalate or phenol. A case (2) having an opening (20);
A closing member (30) attached to the opening and closing the opening,
The closing member includes a first locking portion (31, 31b),
The case includes a second locking portion (21) formed at the opening edge,
The contact surface between the closing member and the opening edge around the opening of the case has a contact surface by mutual locking of the first locking portion and the second locking portion. A pressing force is generated ,
One of the first locking part and the second locking part includes a clamping part (31, 31b),
The other of the first locking portion and the second locking portion different from the one includes a sandwiched portion (21),
When the sandwiched portion is sandwiched by the sandwiched portion, the closing member closes the opening of the case,
The thin part (21b) is formed in the part clamped by the said clamping part of the said clamping part,
The thin part is thinner than the other part sandwiched by the sandwiched part of the sandwiched part,
A case unit in which the thin portion is elastically deformed by the sandwiched portion being sandwiched by the sandwiching portion, and a pressing force that presses the contact surface is generated. The sandwiching portion includes a first portion (31b) that contacts the thin portion from one side in the thickness direction of the sandwiched portion, and a second portion that contacts the thin portion other than the thin portion of the sandwiched portion from the other side in the thickness direction. (31)
In the state where the sandwiched portion is not sandwiched between the sandwiched portions, the distance (t1) between the first portion and the second portion in the thickness direction is a portion other than the thin portion of the sandwiched portion. The case unit of Claim 5 smaller than the thickness (t0) in the said thickness direction.

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