JPH09295505A - Intake unit of vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To aim at the simplification of a casing structure as well as to make its airtightness so better, aside from low cost. SOLUTION: A motor M driving a fan 11 is pressed in a lower case 1b of a unit case consisting of both upper and lower cases halved and a tubular holding part 12 to be housed in an inner part of the case is integrally formed there. In addition, a rib part 41 is installed projectingly outward along an outer boundary of the holding part 12 on an outer surface of the lower case 1b, and furthermore, plural pieces of screwing boss part 42 are formed as adjoining to this rib part 41.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an intake unit of a vehicle air conditioner.

[0002]

2. Description of the Related Art Generally, an air conditioner for a vehicle includes an intake unit for taking in the air inside the vehicle and / or the air outside the vehicle, a cooler unit having an evaporator for cooling the air, and a heater core for heating the air. It has an internally provided heater unit. When cooling the passenger compartment, the air taken in from the intake unit is cooled by an evaporator and then blown out from a plurality of outlets provided in the heater unit toward a desired position in the passenger compartment. On the other hand, when heating the passenger compartment, the air taken in from the intake unit is heated by the heater core and then blown out from the outlet toward a desired position in the passenger compartment.

As shown in FIG. 7, the intake unit of such a vehicle air conditioner has a unit case 1 consisting of a pair of upper case 1a and lower case 1b which are divided in two, and takes in air. Fan 11 for
A blower including a motor M for rotating the fan 11 is provided.

A substantially disk-shaped flange member 15 made of a metal material or a resin material is attached to the side surface of the motor M, and the motor M is opened by the flange member 15 in the lower case 1b of the unit case 1. It is fixed by a screw member 19 so as to close the motor mounting hole 2.

[0005]

By the way, the motor M of the blower in the intake unit of the conventional vehicle air conditioner has a side surface of the motor M in consideration of the assemblability of the intake unit and the workability of replacement during service. A flange member 15 is provided on the unit case 1 to be attached to the unit case 1 as a separate body.

However, in the intake unit of this vehicle air conditioner, the casing structure forming the main frame of the intake unit has a so-called three-part structure of the upper case 1a, the lower case 1b, and the flange member 15, so that the flange member is formed. There is a drawback in that the number of parts forming the intake unit including the screw member 19 for fixing 15 increases and the man-hour for assembling the intake unit increases accordingly.

Further, in order to maintain the airtightness of the intake unit, it is necessary to secure the sealing property at the contact portion between the flange member 15 and the side surface of the motor M and the joint portion between the flange member 15 and the lower case 1b. There is also a problem that the structure becomes complicated.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to simplify the casing structure and to provide a low cost and airtight vehicle air. It is to provide an intake unit of a harmony device.

[0009]

The present invention for achieving the above object is specified as follows for each claim. The invention according to claim 1 is for a vehicle having a unit case composed of a pair of cases divided into two, a fan for taking air into the unit case and sending the air toward a vehicle interior, and a motor for driving the fan. In the intake unit of an air conditioner, the holding unit for accommodating the motor inside is integrally formed in one of the unit cases, and the intake unit of the air conditioner for a vehicle is characterized.

According to a second aspect of the present invention, in the intake unit of the vehicle air conditioner according to the first aspect, the holding portion has a tubular shape into which the motor is press-fitted.

According to a third aspect of the present invention, in the intake unit of the vehicle air conditioner according to the first aspect, a plurality of screwing boss portions are provided around the holding portion of the one case. It is characterized by being formed.

According to a fourth aspect of the present invention, in the intake unit of the vehicle air conditioner according to the third aspect, the screwing boss portion is provided around the holding portion on the outer surface of the one case. It is formed in the vicinity of a rib portion that is provided so as to project outward along the.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an intake unit of a vehicle air conditioner that is an embodiment of the present invention, and FIG. 2 is a sectional view showing how a blower is set in a lower case of a unit case, and FIG. The same reference numerals are given to members common to the members shown.

The intake unit 10 shown in FIG. 1 has a resin-made unit case 1 as a body frame.
The unit case 1 is composed of a pair of upper case 1a and lower case 1b which are divided into two. The upper case 1a has an outside air intake 34 for introducing air outside the vehicle compartment.
An inside / outside air switching box 32 including an inside air intake 35 for introducing air into the vehicle interior is provided. An intake door 38 is attached to the inside / outside air switching box 32 so that the outside air inlet 34 and the inside air inlet 35 can be selectively opened / closed and switched.

These upper case 1a and lower case 1b
Are joined together, as shown in the drawing, a fan scroll portion 36 that takes in and sends air, and a blower duct portion 37 that expands and extends from the fan scroll portion 36.
Are formed.

Further, the intake unit 10 is provided with a blower composed of a fan 11 for taking in air from the outside air intake 34 and / or the inside air intake 35 and a motor M for rotating the fan 11. ing.

As shown in FIG. 2, the fan 11 of the blower
Is a multi-blade centrifugal fan, and is a rotating shaft 16a of the motor M.
A boss portion 21 attached to the boss portion 21, a disk portion 22 that bulges outward in the radial direction from a side wall of the boss portion 21, and a plurality of blades 23.

The motor M is constructed so as to rotate about an axis in a substantially vertical direction. The air taken in by the rotation of the fan 11 is pressurized by the fan 11, is pushed out to the spiral passage of the fan scroll portion 36, flows along the passage, and then is blown through the blower duct portion 37. It is like this.

Particularly in this embodiment, the unit case 1
In the lower case 1b, a holding portion 12 that houses the motor M of the blower inside is integrally formed by resin molding. Therefore, the casing structure of the intake unit 10 is a simple two-part structure having only the upper case 1a and the lower case 1b.

The holding portion 12 has a cylindrical shape having an inner shape corresponding to the outer shape of the cylindrical housing 16 of the motor M, and the inner surface of the holding portion 12 has a predetermined height, that is, protrudes inward in the radial direction. A plurality of fixing ribs 14 are provided at even intervals on the circumference. The height of the fixing ribs 14 is such that when the cylindrical housing 16 of the motor M is inserted into the holding portion 12, the fixing ribs 1 are provided on the side surface of the cylindrical housing 16.
It is set to such a degree that the tip of 4 is pressed and lightly press-fitted. Therefore, when replacing the motor M, it is easy to pull out and remove it with an appropriate force.

A cooling pipe insertion portion 15 for mounting a cooling pipe (not shown) is integrally formed on the lower end of the holding portion 12. The cooling pipe is a fan scroll unit 36.
A part of the air is taken out from the internal air passage and introduced into the motor M, whereby the heat-generating components of the motor M are cooled and the durability is improved.

When assembling the intake unit 10 of the vehicle air conditioner of the present embodiment, first,
The fan 11 is fixed to the rotating shaft 16a of the motor M to form a blower. Then, the cylindrical housing 16 of the motor M of the blower is press-fitted into the holding portion 12 formed integrally with the lower case 1b of the unit case 1 and fixed by the screw member 17.

As described above, since the casing structure of the intake unit 10 is a simple two-part structure having only the upper case 1a and the lower case 1b, the intake unit is more convenient than the conventional motor with a flange member. The number of parts constituting 10 can be reduced, and the cost can be reduced. In addition, this makes it easy to assemble the blower and can significantly reduce the number of assembly work steps.

Further, since the motor M is press-fitted into the holding portion 12, the blower can be securely held in the unit case 1, so that the fixing screw member 17 is minimized, for example, only one. However, the motor M can be fixed.

Moreover, since the holding portion 12 for fixing the motor M is integrally formed on the lower case 1b, the airtightness of the unit case 1 is significantly improved, and the sealing performance between the flange member and the lower case 1b is improved as in the conventional case. There is no need for a complicated structure to secure

After fixing the blower to the holding portion 12 of the lower case 1b in this manner, the upper case 1a to which the intake door 38 and the like are attached is covered from above and joined.

On the other hand, when it is necessary to replace the motor M of the intake unit 10 of the present embodiment when servicing the vehicle air conditioner, the screw member 17 is removed after removing the entire lower case 1b. Holding unit 12
It is possible to replace the motor M by pulling out the motor M press-fitted into the fan 11 together with the fan 11.

FIG. 3 is a perspective view of an intake unit of an air conditioner for a vehicle, which is another embodiment of the present invention, viewed from below, in which members common to those shown in FIGS. The same reference numerals are attached.

In the intake unit 40 shown in FIG. 3,
A rib portion 41 is provided so as to project outward along the periphery of the holding portion 12 on the outer surface of the lower case 1b, and a plurality of boss portions 42 for screwing are formed adjacent to the rib portion 41. Other configurations are the same as those of the above-described embodiment (shown by the one-dot chain line in FIG. 2). Rib part 41
Has a ring shape with a predetermined height, and has a flat surface 41a.
have. In addition, the boss portion 42 is formed adjacent to the outside of the rib portion 41 so as to have the same height.

In the intake unit 40 of this vehicle air conditioner, when it is necessary to replace the motor M, the lower case 1b is cut along the inner circumference of the rib portion 41. In this case, for example, a heated so-called hot cutter can be used for easy cutting.
FIG. 4 is a perspective view showing a state in which the lower case 1b is cut and the blower is taken out. In this way, the portion to be cut in the lower case 1b becomes clear and the rib portion 4
Since 1 can be used as a guide for cutting, the cutting operation can be performed easily and reliably. The formation of the rib portion 41 has an advantage that the rigidity of the lower case 1b can be increased.

In FIG. 4, the blower is drawn upward for the sake of convenience of description, but in practice, the cutting work is performed below the intake unit 40 of the vehicle air conditioner mounted on the vehicle. Can be done from
Therefore, even if it is difficult to remove the entire lower case 1b in the vehicle mounted state due to the layout, the blower can be removed in the vehicle mounted state according to the present embodiment.

The blower taken out by cutting the lower case 1b is pressed into the holding portion 12, and as shown in FIG. 5, the peripheral portion of the holding portion 12 of the lower case 1b, the motor M, and the fan 11 are inserted. Is decomposed into and. Fan 1 of these
1 can be used, and as shown in FIG. 6, by attaching the fan 11 to a new motor M having a flange member 15, an externally attached flanged blower 45 for service can be obtained. The flange member 15 is provided with a plurality of mounting holes 15a at positions corresponding to the bosses 42 of the lower case 1b.

Therefore, the blower 45 with a flange is
The structure is similar to that of a conventional motor with a flange member shown in FIG. 7, and a tapping screw (not shown) is inserted into the mounting hole 15a and screwed into the boss portion 42, so that the holding portion 12 shown in FIG. For the lower case 1b whose peripheral portion is cut, a blower 45 with a flange can be easily installed.
Can be attached to the lower case 1b. Here, it is desirable to form a small diameter hole having a predetermined depth in the center of the boss portion 42 in order to facilitate the screwing of the tapping screw.

According to this embodiment, in the initial product of the intake unit 40, not only a simplified casing structure as described above can be obtained at low cost and good airtightness, but also a motor can be used. It has the above-mentioned advantages when it needs to be replaced.
That is, the holding portion 1 of the lower case 1b is not disassembled into the upper case 1a and the lower case 1b.
2 The blower can be taken out only by cutting the peripheral portion, and since the lower case 1b is provided with the boss portion 42, the blower 45 with a flange that can be externally attached for service is provided so as to close the cut portion. By assembling and tightening the screws using the boss portion 42, the motor replacement work can be easily performed. Moreover, the cutting of the peripheral portion of the holding portion 12 of the lower case 1b is performed by the rib portion 41.
Since it can be used as a guide, the cutting work can be performed easily and reliably. Further, this makes it possible to further reduce the number of man-hours required for exchanging the motor.

The embodiment described above is described for facilitating the understanding of the present invention, and is not described for limiting the present invention, and various modifications can be made. it can. For example, in the above-described embodiment, the holding portion 12 has a cylindrical shape into which the motor M is press-fitted, but may have a polygonal cylindrical shape, for example. Further, although the boss portion 42 for screwing is formed adjacent to the outside of the rib portion 42, it may be formed at the center position of the rib portion 42, for example. On the other hand, the rib portion 4
2 is omitted, and instead, the holding portion 12 of the lower case 1b is used.
It is also possible to adopt a configuration in which a ring-shaped concave groove that is recessed inward of the case is formed around the periphery of the case, and the boss portion 42 projects inward of the lower case 1b and is formed outside the concave groove.

[0036]

As described above, according to the present invention, the following effects can be obtained for each claim. In the invention according to claim 1, since the casing structure of the intake unit is a simple two-part structure consisting of a pair of cases, parts constituting the intake unit as compared with the conventional motor with a flange member attached externally. The number of points can be reduced, and the cost can be reduced. In addition, this makes it easy to assemble the blower and can significantly reduce the number of assembly work steps. Further, the motor can be housed in the holding portion and securely held in the unit case, and the fixing screw member can be minimized.

Moreover, since the holding portion for accommodating the motor is integrally formed in the case, the airtightness of the unit case is remarkably improved, and a complicated structure for ensuring the sealing property between the flange member and the case as in the conventional case is provided. There is no need.

According to the second aspect of the invention, the motor can be housed and fixed very easily by simply press-fitting the motor into the cylindrical holding portion of the case.

Further, in the third aspect of the present invention, since a plurality of screwing boss portions are formed around the holding portion of the case, the unit case must be disassembled when the motor needs to be replaced. Instead, the motor can be taken out simply by cutting the peripheral part of the holding part, and the motor with an externally attachable flange for service is installed to close the cut part, and the boss part provided on the case By tightening the screw by using, it becomes possible to easily perform the motor replacement work.

Further, in the invention according to the fourth aspect, since the rib portion can be used as a guide to cut the peripheral portion of the holding portion of the case, the cutting work can be performed easily and reliably. Further, this makes it possible to further reduce the number of man-hours required for exchanging the motor.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an intake unit of a vehicle air conditioner that is an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing how a blower is set in a lower case of a unit case.

FIG. 3 is a perspective view of the intake unit of the vehicle air conditioner according to another embodiment of the present invention as seen from below.

FIG. 4 is a perspective view showing a state in which a lower case is cut and a blower is taken out.

FIG. 5 is a perspective view showing a state in which the blower taken out by cutting the lower case is disassembled.

FIG. 6 is a perspective view showing an externally attachable flanged blower for service.

FIG. 7 is a cross-sectional view of a main part of an intake unit of a conventional vehicle air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Unit case, 1a ... Upper case (case), 1b ... Lower case (case), 11 ... Fan, 12 ... Holding part, 41 ... Rib part, 42 ... Boss part, M ... Motor.

Claims (4)

[Claims] 1. A pair of cases (1a, 1) divided into two parts.
a vehicle having a unit case (1) including b), a fan (11) for taking in air into the unit case (1) and sending the air toward a passenger compartment, and a motor (M) for driving the fan (11). In the intake unit of the air conditioner for a vehicle, in one case (1b) of the unit case (1),
An intake unit for a vehicle air conditioner, characterized in that a holding part (12) for accommodating the motor (M) inside is integrally formed. 2. The intake unit for a vehicle air conditioner according to claim 1, wherein the holding portion (12) has a tubular shape into which the motor (M) is press-fitted. 3. A plurality of screwing boss portions (42) around the holding portion (12) of the one case (1b).
The intake unit of the vehicle air conditioner according to claim 1, wherein the intake unit is formed. 4. The screwing boss (42) is provided on the outer surface of the one case (1b) with the holding portion (1).
The rib is formed in the vicinity of a rib portion (41) provided so as to project outward along the circumference of 2).
The intake unit of the vehicle air conditioner according to 1.