JP2002021797A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leakage of air while absorbing vibration of a blower. SOLUTION: A plurality (three pieces) of first rubber vibration isolators 214 support a motor 212, and a second rubber vibration isolator 215 prevents leakage of air through a clearance between a casing 213 and the motor 212 (a flange part 212b). Therefore, the first rubber vibration isolators 214 supporting the motor 212 need not be disposed all around the flange part 212b. Since the first rubber vibration isolators 214 support the motor 212 at three locations, it is possible to use the first rubber vibration isolators 214 having a coefficient of elasticity K1 capable of supporting the motor 212 while preventing the coefficient of elasticity K1 of the first rubber vibration isolators 214 from becoming excessively large. Thus, vibration of the motor 212 can effectively be absorbed while preventing leakage of air through the clearance of the casing 213 and the motor 212 (flange part 212b).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower (particularly, a vibration-proof structure thereof), and is effective when applied to a blower of an air conditioner for a vehicle.

[0002]

2. Description of the Related Art In a blower of a vehicle air conditioner, an electric motor for driving a blower fan is directly fixed to a casing by bolts.

[0003]

By the way, the inventor of the present invention has replaced a vehicle device, such as an air conditioner or an instrument, mounted on a dashboard on the vehicle front side with a pipe-shaped reinforcing member (reinforce bar) for reinforcing a vehicle body. After assembling the vehicle into the cockpit module to improve the assemblability of the vehicle (reducing the number of assembling steps) by assembling the vehicle with the installed rain force bar, the following is described. Problem has occurred.

That is, prior to the cockpit module, the air conditioner was mounted on a partition wall (fire wall) or floor that separates the interior of the vehicle from the exterior of the vehicle without being mounted on the rain bar. Was not transmitted to the rainforce bar.

However, in the cockpit module, the blower (air conditioner) is mounted on the rain bar, so that the vibration of the blower is transmitted to the steering wheel mounted on the rain bar via the rain bar, and the steering wheel is mounted on the rain bar. There was a problem that unpleasant vibrations occurred.

Before the cockpit module, the vibration of the blower (electric motor) was transmitted to the firewall and the floor, but the firewall and the floor are a part of the vehicle body, and are sufficiently compared with the steering. Due to the large mass, the amplitude of the vibration transmitted to the firewall and floor was small enough that the occupants did not feel discomfort.

In order to solve such a problem, a method of assembling an electric motor to a casing for air blowing through an elastic member such as an anti-vibration rubber can be considered. However, an anti-vibration rubber is provided between the electric motor and the casing. In such a case, a gap is generated between the electric motor and the casing, and a new problem that air leaks from the gap occurs.

In order to solve this problem, it is conceivable to provide a vibration isolating rubber over the entire area of the gap and seal the gap with the vibration isolating rubber. Therefore, a sufficient anti-vibration effect cannot be obtained.

On the other hand, if a vibration-proof rubber having a small elastic coefficient is disposed in the entire area of the gap, it is possible to obtain a vibration-proof effect while preventing air leakage, but to obtain a sufficient vibration-proof effect. As described above, the vibration-proof rubber having a small elastic coefficient has a high possibility that the deformation of the electric motor due to its own weight exceeds the elastic limit of the vibration-proof rubber, and the electric motor can be supported by the vibration-proof rubber. There is a high possibility that it cannot be done

In view of the above, it is an object of the present invention to prevent air leakage while absorbing vibration of a blower.

[0011]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, a fan (211) for blowing air and a driving means (R) for rotating the fan (211) are provided. 212) and a casing (21) for accommodating the fan (211) and supporting the driving means (212).
(3) a blower having:
Are supported and fixed to the casing (213) at a plurality of locations via a first elastic member (214) that can be elastically deformed. Further, the casing (213) and the driving means (21)
A second elastic member (215) capable of elastically deforming is provided, which seals a gap between the second elastic member and the second member and prevents air from leaking from the gap.

Accordingly, it is not necessary to dispose the first elastic member (214) supporting the driving means (212) over the entire circumference of the gap between the driving means (212) and the casing (213).

Further, since the first elastic member (214) supports the driving means (212) at a plurality of places, the first elastic member (214) supports the first elastic member (214).
The elastic coefficient of the first elastic member (214) is controlled by the driving means (212) while preventing the elastic coefficient of the elastic member (214) from becoming excessively large (to the extent that a sufficient vibration-proof effect cannot be obtained). ) Can be large enough to support.

Therefore, the vibration of the driving means (212) can be effectively absorbed while preventing the air from leaking from the gap between the casing (213) and the driving means (212).

The elastic coefficient (K1) of the first elastic member (214) is equal to or greater than the elastic coefficient (K2) of the second elastic member (215). It is desirable.

The first and second elastic members (214, 21)
5) may be integrally formed of rubber as in the third aspect of the present invention.

According to the fourth aspect of the present invention, the dimension (H1) of the first elastic member (214) in the direction of expansion and contraction is the second dimension.
By making the elastic member (215) smaller than the dimension (H2) in the expansion and contraction direction, the elastic coefficient (K1) of the first elastic member (214) is changed to the elastic coefficient (K2) of the second elastic member (215).
It may be larger.

Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) In this embodiment, a blower according to the present invention is applied to an air conditioner for a vehicle, and FIG. 1 is a schematic diagram of an air conditioner for a vehicle according to the present embodiment. is there. As described in the section of "Problem to be Solved by the Invention", in this vehicle air conditioner, in FIG. 1, 100 is blown into a vehicle cabin by cooling or heating the air. An air-conditioning unit 200 for adjusting the temperature and humidity of air is provided. The air-conditioning unit 200 has an inside / outside air switching mechanism (hereinafter, referred to as an air-conditioning unit) for selectively introducing vehicle interior air or vehicle exterior air and blowing the introduced air to the air conditioning unit 100. , A blower unit).

The air conditioning unit 100 includes a resin air conditioning casing 101 forming an air passage, a cooling heat exchanger 102 for cooling air flowing through the air conditioning casing 101, and an air flowing through the air conditioning casing 101. Heat exchanger 103 for heating the vehicle, an air mix door (air temperature adjusting means) 104 for adjusting the temperature of the air blown into the vehicle interior by adjusting the amount of air passing through the heating heat exchanger 103, the vehicle interior Outlet 105 to communicate with
It comprises blowing mode doors 108 to 110 for opening and closing 107 to control the blowing mode.

The outlet opening 105 is provided in the vehicle window glass g.
To blow air toward the air outlet 1
Reference numeral 06 denotes an air outlet for blowing air toward the upper body of the occupant, and an air outlet 107 for blowing air toward the lower body of the occupant.

FIG. 2 is a schematic view of the blower unit 200. Reference numeral 201 denotes a resin-made inside / outside air switching casing formed with an inside air introduction port 202 for introducing air inside the vehicle and an outside air introduction port 203 for introducing air outside the vehicle. Reference numeral 204 denotes an inside / outside air switching door (inside / outside air switching means) for switching between the inside air introduction port 202 and the outside air introduction port 203 to open and close.

An air duct (not shown) connected to the outside air inlet 203 is provided at the outer edge of the outside air inlet 203.
A packing 203a for preventing the occurrence of air leakage at a connection portion between the airbag and the outside air inlet 203 is provided.

Reference numeral 205 denotes a filter for purifying air by removing dust in the air introduced into the inside / outside air switching casing 201, and sends air to the air conditioning casing 101 downstream from the filter 205 in the air flow direction. A blower 210 is provided.

The blower 210 includes a centrifugal multi-blade fan (hereinafter, abbreviated as a fan) 211 and a fan 2 for blowing.
And a resin scroll casing (hereinafter abbreviated as a casing) 213 that accommodates an electric motor (a rotational drive) 212 that rotationally drives the motor 11 and a fan 211 and supports the electric motor (hereinafter abbreviated as a motor) 212. It is composed of

The casing 213 is fixed to an inside / outside air switching casing. The casing 213 has a spiral shape that converts the dynamic pressure of the air flow into static pressure while collecting the air blown from the fan 211.

The motor 212 has a cylindrical motor body 212a composed of a rotor, a stator, and the like, and a disk-shaped metal motor flange portion (radially outwardly extending from the motor body 212a). Hereinafter, it is abbreviated as a flange portion.)
Is partially attached to the casing 213 via a plurality of (three in this embodiment) elastically deformable rubber first vibration isolating rubbers 214 (first elastic members) attached to the outer edge side of the flange portion 212b. It is supported and fixed.

Further, the flange portion 21b is located radially outward of the first vibration isolating rubber 214 in the flange portion 212b.
2b over the entire circumference of the casing 213 and the motor 212
(Flange portion 212b) to seal the gap, prevent air from leaking from this gap, and reduce the vibration of the motor 212 together with the first vibration-proof rubber 214. 215 (a second elastic member) is provided, and in the present embodiment, the first vibration isolating rubber 214 is provided.
Is the same as the hardness (material) of the second vibration-proof rubber 215.

FIG. 3 shows the first and second vibration isolating rubbers 214 and 2.
15 is an enlarged view of a portion 15, and 216 denotes a first vibration-proof rubber 214.
The collar 216 is a metal collar that penetrates in the up-down direction. The collar 216 includes a pipe-shaped collar body 216a that penetrates through the first vibration isolation rubber 214, and a disk formed at an axial end of the collar body 216a. Shaped flange part (collar part) 2
16b.

Then, a bolt (fastening means) 217 is inserted into the collar 216 (collar body 216a) from below with the flange 216b positioned below, and the male thread of the bolt 217 is inserted into the female thread of the casing 213. To the screw. Thus, the motor 212 has a structure in which the motor 212 is supported and fixed to the casing 213 via the three first vibration-isolating rubbers 214 from below.

The motor 2 of the first vibration isolating rubber 214
In the present embodiment, in order to make the elastic coefficient K1 in the direction parallel to the axial direction of the second rubber member 12 larger than the elastic coefficient K2 in the direction parallel to the axial direction of the motor 212 of the second rubber cushion 215, the first rubber cushion is used. The dimension H1 of the portion of the second rubber member 215 parallel to the axial direction of the motor 212 is smaller than the dimension H2 of the portion of the second vibration isolating rubber 215 parallel to the axial direction of the motor 212.

Next, the features of this embodiment will be described.

According to this embodiment, the first vibration isolating rubber 214
Supports the motor 212, and the casing 213 and the motor 212 (flange portion 212 b) are supported by the second vibration-proof rubber 215.
The first anti-vibration rubber 214 that supports the motor 212 does not need to be provided over the entire circumference of the flange portion 212b because air is prevented from leaking from the gap between the first and second motors.

Further, since the first anti-vibration rubber 214 supports the motor 212 at a plurality of positions (three in this embodiment), the elastic coefficient K1 of the first anti-vibration rubber 214 is excessively (sufficiently). While preventing the first vibration-proof rubber 214 from becoming large.
Can be made large enough to support the motor 212.

Therefore, the casing 213 and the motor 2
The vibration of the motor 212 can be effectively absorbed while preventing air from leaking from a gap between the motor 212 and the flange 12b. As a result, in the cockpit module, it is possible to prevent the vibration of the blower 210 from being transmitted to the steering via the rain bar.

By the way, as is apparent from FIG. 2, in the present embodiment, the vibration in the direction parallel to the axial direction of the motor 212 is absorbed by the expansion and contraction of the first and second anti-vibration rubbers 214 and 215. In the direction orthogonal to the axial direction of the motor 212, the vibration is attenuated while the friction at the contact portion between the first vibration isolating rubber 214 and the flange portion 212b and the contact portion between the second vibration isolating rubber 214 and the casing 213 are reduced. Damping vibration by friction.

The first and second vibration isolating rubbers 214 and 215
Expands and contracts mainly in a direction parallel to the axial direction of the motor 212, so that the elastic coefficient K1 in the direction parallel to the axial direction of the motor 212 of the first vibration isolating rubber 214 is
If the elastic coefficient K2 of the first vibration-proof rubber 214 in the direction parallel to the axial direction of the motor 212 is larger than the elastic coefficient K1 of the first vibration-isolating rubber 214, the second vibration-proof rubber 214 is made large enough to reliably support the motor 212. The vibration-proof (vibration-absorbing) ability of the rubber 215 can be exhibited.

Incidentally, the first vibration isolating rubber 214 is
12 absorbs vibration by shrinking when the casing 213 is displaced in the direction in which the casing 213 is moving away, while the second vibration isolating rubber 214 is vibrated by shrinking when the motor 212 is displaced in a direction approaching the casing 213. Absorb. In other words, in the present embodiment, both the vibration isolation rubbers 214 and 21 are used.
5 is to be used with compression weighting.

(Second Embodiment) In this embodiment, as shown in FIG. 4, the first and second vibration-isolating rubbers 214 and 215 are integrally formed.

In this embodiment, the first anti-vibration rubber 21 is used.
The ratio (S1 / H1) of the contact area S1 of the first vibration-proof rubber 214 to the dimension H1 of a portion of the first vibration-proof rubber 214 parallel to the axial direction of the motor 212, the second vibration-proof rubber 214 and the casing 213 Contact area S2 with the second vibration isolating rubber 21
5, the dimension H2 of a portion parallel to the axial direction of the motor 212
And the ratio (S2 / H2) of the first anti-vibration rubber 214 in the direction parallel to the axial direction of the motor 212 and the axis of the motor 212 in the second anti-vibration rubber 215 The elastic coefficient K2 in the direction parallel to the direction is made substantially equal.

(Other Embodiments) In the above embodiment, the axial direction of the motor 212 coincides with the vertical direction. However, the present invention is not limited to this. For example, as shown in FIG. The axial direction of the motor 212 may be horizontal.

In the above embodiment, the blower according to the present invention is applied to an air conditioner for a vehicle. However, the present invention is not limited to this, and can be applied to other uses such as a ventilation fan. .

The present invention also relates to a motor (driving means) 21
A first vibration-isolating rubber (first elastic member) 214 supporting
Second anti-vibration rubber (second elastic member) 21 for preventing air leakage
5 to support the motor 212 while preventing air leakage, and to provide a second vibration-proof rubber (second elastic member) 215.
The elastic coefficient K2 of the first vibration-proof rubber (first elastic member) 214 is suppressed by increasing the elastic coefficient K2 of the motor 212 at a plurality of locations, and the vibration of the motor 212 is absorbed. Therefore, the material of the first elastic member is not limited to rubber, but may be an elastic member such as a metal spring.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a vehicle air conditioner using a blower according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a blower according to a first embodiment of the present invention.

FIG. 3 is an enlarged view of an anti-vibration rubber portion of the blower according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram of a blower according to the first embodiment of the present invention.

FIG. 5 is a schematic diagram of a blower according to another embodiment of the present invention.

[Explanation of symbols]

210: blower, 211: fan, 212: motor, 2
12a: motor body, 212b: motor flange,
213: scroll casing, 214: first vibration-proof rubber (first elastic member), 215: second vibration-proof rubber (second elastic member).

Claims (4)

[Claims] 1. A fan (211) for blowing air, and a driving unit (21) for rotationally driving the fan (211).
2) and a blower having a casing (213) for accommodating the fan (211) and supporting the driving means (212), wherein the driving means (212) is an elastically deformable first elastic member. The casing (2) is provided at a plurality of locations via a member (214).
13), and is further fixed to the casing (213) and the driving means (2).
12) A blower characterized by being provided with a second elastic member (215) capable of elastic deformation, which seals a gap with the above (12) and prevents air from leaking from the gap. 2. The elastic modulus (K1) of the first elastic member (214) is equal to or greater than the elastic modulus (K2) of the second elastic member (215). A blower as described in. 3. The first and second elastic members (214, 21).
5) The blower according to claim 1 or 2, wherein the blower is integrally formed of rubber. 4. The expansion and contraction dimension (H1) of the first elastic member (214) is smaller than the expansion and contraction dimension (H2) of the second elastic member (215). Blower.