JP2006007946A - Air conditioning device for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make wind speed distribution in a front surface of a heat exchanger for cooling appropriate by equalizing blowing capacity of both blowers in a pair of (dual) blowers having a double ended shaft motor and fans connected to both ends of the motor shaft respectively. <P>SOLUTION: This device is provided with a pair of blowers 4a, 4b introducing air into a air conditioning case 2, a heat exchanger 5 conditioning temperature of the introduced air, and an inside and outside air switching box 19 arranged in a side in an upstream of a pair of the blowers 4a, 4b. In a pair of the blowers 4a, 4b, two fans 13a, 13b are driven by a double ended shaft motor 12. An intake opening of a pair of the blowers 4a, 4b on an inside and outside air switching box side is formed on an anti-motor side and one in an anti-inside and outside air switching box side is formed on a motor side. A diameter of a blower case 14a on the inside and outside air switching box side is formed smaller than a diameter of a blower case 14b on the anti-inside and outside air switching box side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an automotive air conditioner that is mounted in an automobile and aims at air conditioning of the passenger compartment.

2. Description of the Related Art In recent years, in a small vehicle to be developed, the space in the front-rear and left-right directions of an automobile air conditioner disposed at the lower part of an instrument panel has been reduced. As an air conditioner suitable for such a vehicle, a cooling heat exchanger and a heating heat exchanger are installed vertically (set in the front-rear direction of the vehicle), and an integrated blower is developed. An integrated air conditioner for automobiles has been developed at the center as shown in Patent Documents 1 and 2.
JP 2002-79820 A JP 2002-337533 A

  In the example shown in this patent document, the evaporator 2 is disposed in the front and rear direction of the vehicle in the unit case 5, and the heater core 3 is disposed on the rear side thereof, and one blower 1 that supplies air to both the heat exchangers 2 and 3. Is disposed above and on the front side of the cooling heat exchanger 2. In order to obtain the air volume from this single blower, a large fan having a diameter of about 140 mm must be used, and the rotational speed must be increased. For this reason, an increase in size and an increase in noise have occurred.

Therefore, not only to reduce the size of the blower space, but also to reduce the airflow resistance and reduce noise, one motor with both shafts, the fans on both shafts of this motor, and the air conditioning case that houses them. A dial blower having a pair of blower cases that are a part of the above has been developed. For example, it is shown in Patent Document 3.
JP 2003-80921 A

  However, in Patent Document 3, there is an example in which a margin is left in the front-rear direction of the vehicle. However, as described above, in an example mounted on a recent small vehicle, the inside and outside air for introducing vehicle interior air or vehicle exterior air is used. There is no space for the air switching box in the front-rear direction of the vehicle. Therefore, although it is provided on one side of the blower (the vehicle left-right direction), the amount of air introduced into the left and right blowers is farther away from the inside / outside / outside than the blower on the inside / outside air switching box side due to unbalanced passage resistance There is a disadvantage that the air volume from the blower on the air switching box side is reduced by several percent. As a result, the wind speed distribution on the front surface of the cooling heat exchanger is deteriorated, resulting in non-uniformity in the amount of air blown into the passenger compartment and non-uniformity in the temperature of the air.

  Therefore, the present invention is in a pair of (two) blowers having a motor of both shafts and fins on both sides of the motor, and the air blowing capacity from both blowers is made uniform so that the front surface of the heat exchanger for cooling This is to improve the wind speed distribution.

  An automotive air conditioner according to the present invention includes a pair of blowers that introduce air into an air conditioning case, a heat exchanger that regulates the temperature of the introduced air, an upstream side of the pair of blowers, and a side thereof. An indoor / outdoor air switching box for selectively introducing indoor air or outside air, and the pair of blowers are driven by two fans by a single shaft motor, and the suction ports of the pair of blowers are The inside / outside air switching box side is formed on the non-motor side, the inside / outside air switching box side is formed on the motor side, and the diameter of the blower case on the inside / outside air switching box side is the diameter of the blower case on the inside / outside air switching box side. (Claim 1).

  By this. Because the diameter of the blower case on the inside / outside air switching box side is smaller than the diameter of the blower case on the inside / outside air switching box side, the air blowing capacity from both blowers is made uniform, and the wind speed distribution in front of the cooling heat exchanger Can be made favorable (uniform). Therefore, not only the blown air volume but also the blown temperature can contribute to the uniformization.

  In addition, an automotive air conditioner according to the present invention is arranged in a pair of blowers that introduce air into an air conditioning case, a heat exchanger that regulates the temperature of the introduced air, and upstream and laterally of the pair of blowers. A pair of blowers in which two fans are driven by motors of both shafts, and the suction ports of the pair of blowers are: The inside / outside air switching box side is on the side opposite to the motor, and the inside / outside air switching box side is formed on the motor side, and the blower case on the inside / outside air switching box side bites into the suction port on the inside / outside air switching box side. (Claim 2).

  As a result, the motor bites into the blower case on the inside / outside air switching box side and is separated from the suction port on the non-inside / outside air switching box side, thereby reducing the passage resistance around the suction port of the blower case on the inside / outside air switching box side. Thus, the air blowing capacity from both blowers is made uniform, and the wind speed distribution on the front surface of the cooling heat exchanger can be made good (uniform).

  Furthermore, an automotive air conditioner according to the present invention is arranged in a pair of blowers for introducing air into an air conditioning case, a heat exchanger for controlling the temperature of the introduced air, and upstream and laterally of the pair of blowers. A pair of blowers in which two fans are driven by a motor of one shaft and the suction of the pair of blowers is further provided. The mouth is formed with the inside / outside air switching box side on the anti-motor side and the inside / outside air switching box side on the motor side, and the diameter of the blower case on the inside / outside air switching box side is set to the blower case on the inside / outside air switching box side. Further, the motor is bitten into the blower case on the inside / outside air switching box side and separated from the suction port on the non-inside / outside air switching box side (Claim 3).

  As a result, the diameter of the blower case on the inside / outside air switching box side is first reduced compared to the diameter of the blower case on the non-inside / outside air switching box side, and second, the motor bites into the blower case on the inside / outside air switching box side. Since it is separated from the suction port on the non-inside / outside air switching box side, the passage resistance of the suction port on the non-inside / outside air switching box side is reduced, so that the air blowing capacity of both blowers is made uniform, and the cooling heat exchanger The wind speed distribution on the front surface can be made good (uniform).

  The pair of blowers is composed of a motor, a pair of fans on both sides thereof, and a blower case formed with a pair of scrolls that form a part of the air conditioning case that houses the motor. (Claim 4).

  As described above, according to the first aspect of the present invention, the air blowing capacity from both blowers is made uniform by changing the diameters of the pair of blower cases. According to the second aspect of the present invention, the passage resistance around the suction port on the side opposite to the inside / outside air switching box of the pair of blowers is reduced, and the air blowing capacity from both blowers is made uniform. Further, according to the invention of claim 3, along with the change in the diameter of the pair of blower cases, the passage resistance around the suction port on the side opposite to the inside / outside air switching box of both blowers is reduced, and the air blowing capacity from both blowers is made uniform. Is done. In this way, the air blowing capacity of both blowers is made uniform, the air speed at the front surface of the heat exchanger for cooling is made uniform, and thus not only the amount of air sucked into the passenger compartment but also the air blowing temperature contributes to the uniformity. be able to.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 show a first embodiment of the present invention. The vehicle air conditioner 1 shown in this figure is of a center type installed at the center below the instrument panel of the vehicle. The air conditioning case 2 has a pair of blowers 4a and 4b for introducing air and the introduced air. The evaporator 5 and the heater core 6 for cooling and heating, the air mix door 7 for controlling the temperature to a desired temperature, and the vent blowing opening, the defrost blowing opening, and the foot blowing openings 8, 9, 10 that are blown according to the selected blowing mode. have.

  The blowers 4a and 4b are provided in two, which are provided on the fire wall 11 side (front side in the vehicle front-rear direction) of the vehicle air conditioner 1 and on the upper side. As is apparent from FIG. The motors 12 of both shafts are arranged in the center along the left-right direction, and the blowers 4a, 4b are arranged on the left and right.

  The blowers 4a and 4b are composed of a blower case 14a and 14b formed with a scroll which is a part of the air-conditioning case 2, and centrifugal fans 13a and 13b accommodated therein. The inside / outside air switching box 19 side whose diameter is described below is small, and the inside / outside air switching box 19 side is large. Accordingly, in the blower cases 14a and 14b that enclose each, the diameter A of the blower case 14a on the inside / outside air switching box 19 side is small and the diameter B of the blower case 14b on the side opposite to the inside / outside air switching box is large. It is configured. Therefore, if only the blower capacity of the blowers 4a and 4b is observed, the blower 4a is lower than the blower 4b.

  The blower cases 14a, 14b have a scroll shape that gradually expands from the nose at the beginning of winding, and the final ends thereof serve as outlets of the blowers 4a, 4b, and are expanded and continued to the passage for storing the evaporator 5. Further, the blower case 14 a has a suction port 17 on the left side, and the air outside the vehicle or the air inside the vehicle selected from the inside / outside air switching box 19 is sucked. The blower case 14b has a suction port 18 on the motor 12 side and opens in a recessed space 15 described below.

  The motor 12 is of the double shaft type and is arranged between the blower cases 14a and 14b as described above. The diameter of the motor 12 is about half that of the blower cases 14a and 14b. A recessed space 15 is formed therebetween.

  The suction port 18 is opened in the recessed space, and the opening diameter is larger than that of the suction port 17 described above. The ventilation path 20 leading to the suction port 18 is formed in the blower case. Since the diameter of 14a is comprised small, a comparatively big cross-sectional area can be taken.

  The inside / outside air switching box 19 is formed with an outside air introduction port 21 and an inside air introduction port 22, and selects and introduces outside air or inside air through a switching door (not shown), and is integrated into the air conditioning case 2. In FIG. 1, it is arranged upstream of the blowers 4a and 4b and on the left side of the air-conditioning case 2. The suction port 17 of the blower 4a and the suction of the right block 4b through the ventilation passage 20 are provided. Each communicates with the mouth 18.

  From the above configuration, the selected outside air or inside air is sucked from the suction ports 17 and 18 of the respective blowers 4a and 4b by the rotation of the fans 13a and 13b. And it blows out toward the evaporator 5. Since the suction port 18 is larger than the suction port 17, the loss due to passage resistance is compensated, the air blowing capacity from both blowers 4 a and 4 b is made uniform, and the wind speed distribution on the front surface of the evaporator 5 is made uniform. Can do.

  FIG. 3 shows a second embodiment of the present invention. In this embodiment, the reduction by the passage resistance of the blower 4b farther from the inside / outside air switching box 19 is improved. That is, the motor 12 that rotates the fans 13a and 13b of the blowers 4a and 4b is bitten into the blower case 14a of the blower 4a, thereby separating the motor 12 from the suction port 18 of the blower 4b by a distance C. Thereby, the ventilation resistance of the front surface of the suction inlet 18 reduces, the ventilation capability of the blower 4a can be improved, and it can be set as the value close | similar to the ventilation capability of the blower 4a. Thereby, the wind speed distribution on the front surface of the evaporator 5 can be made favorable (uniform). Since the other parts are the same as those of the first embodiment, the same reference numerals are assigned to the drawings and the description thereof is omitted.

  In FIG. 4, a third embodiment of the invention is shown. In this embodiment, the first embodiment and the second embodiment are combined. First, not only the diameter of the fin 13a of the blower 4a but also the diameter of the blower case 14a is reduced. Specifically, the diameter A of the blower case 14a is smaller than the diameter B of the blower case 14b. Secondly, the motor 12 that rotates the fans 13a and 13b is bitten into the blower case 14a of the blower 4a. Specifically, the motor 12 is separated from the suction port 18 by a distance C.

  As a result, the blowing capacity of the blower 4a on the inside / outside air switching box side is reduced in diameter, and the blowing capacity of both blowers 4a, 4b is reduced from the effect of reducing the ventilation resistance near the suction port 18 of the blower 4b on the non-inside / outside air switching box side. Can be made uniform. Thereby, the wind speed distribution of the front surface of the evaporator 5 can be made favorable (uniform). Since the other parts are the same as those of the first and second embodiments, the same reference numerals are assigned to the drawings and the description thereof is omitted.

It is a cross-sectional view of the vicinity of the main part showing the first embodiment of the present invention. It is a longitudinal cross-sectional view same as the above. It is a cross-sectional view of the vicinity of the main part showing a second embodiment of the present invention. It is a cross-sectional view of the vicinity of the main part showing a third embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automotive air conditioner 2 Air conditioning case 4a, 4b Blower 5 Evaporator 6 Heater core 12 Motor 13a, 13b Fan 14a, 14b Blower case 15 Recessed space 17 Suction port 18 Suction port 19 Inside / outside air switching box

Claims (4)

A pair of blowers for introducing air into the air-conditioning case, a heat exchanger for controlling the temperature of the introduced air, and an upstream side of the pair of blowers and laterally arranged to selectively introduce vehicle interior air or vehicle exterior air And an internal / external air switching box
In the pair of blowers, two fans are driven by a single biaxial motor. Further, the suction port of the pair of blowers has a motor on the non-inside / outside air switching box side and a motor on the inside / outside air switching box side. An air conditioner for an automobile having a blower case diameter on the inside / outside air switching box side smaller than a diameter of the blower case on the non-inside / outside air switching box side. A pair of blowers for introducing air into the air-conditioning case, a heat exchanger for controlling the temperature of the introduced air, and an upstream side of the pair of blowers and laterally arranged to selectively introduce vehicle interior air or vehicle exterior air And an internal / external air switching box
In the pair of blowers, two fans are driven by a motor of both shafts, and the suction port of the pair of blowers is on the side of the inside / outside air switching box on the side opposite to the motor, and the side on the side opposite to the inside / outside air switching box is a motor. An automotive air conditioner characterized in that the motor is bitten into a blower case on the side of the inside / outside air switching box and separated from a suction port on the side of the inside / outside air switching box. A pair of blowers for introducing air into the air-conditioning case, a heat exchanger for controlling the temperature of the introduced air, and an upstream side of the pair of blowers and laterally arranged to selectively introduce vehicle interior air or vehicle exterior air And an internal / external air switching box
In the pair of blowers, two fans are driven by a single biaxial motor. Further, the suction port of the pair of blowers has a motor on the non-inside / outside air switching box side and a motor on the inside / outside air switching box side. The blower case on the inside / outside air switching box side is made smaller than the diameter of the blower case on the non-inside / outside air switching box side, and the motor is connected to the blower case on the inside / outside air switching box side. An automobile air conditioner characterized in that it is bitten and separated from the suction port on the side opposite to the inside / outside air switching box.   2. The pair of blowers comprises a motor, a pair of fans on both sides thereof, and a blower case formed with a pair of scrolls that form part of the air-conditioning case that houses the motor. , 2 or 3 automotive air conditioner.

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