KR101723088B1 - Air conditioning system for automotive vehicles - Google Patents

Abstract

The present invention relates to a vehicle air conditioner, and more particularly, to a scroll casing provided with a cutoff, which includes a resonance part for attenuating noise at a position corresponding to the cutoff and a variable part for varying the volume of the resonance part according to the air volume, It is an object of the present invention to reduce the noise by generating a frequency of a reverse phase in accordance with the noise of the bandwidth according to the air volume.
To this end, the present invention provides a vehicular air conditioning system including a blower unit for selectively introducing inside air or outside air to cool and heat the inside of a vehicle, wherein the blower unit includes a blower fan And a scroll casing (10) provided with a chamber (12) and having an inlet (14) for introducing air by rotation of the blowing fan (20) and an outlet (16) for discharging the air introduced to the other side, ); The scroll casing (10) is provided with a cutoff (18) for allowing a part of the air to flow to cool the blowing motor (30); A resonance unit 190 for attenuating noise included in the air; And a variable unit 200 for varying the reverse phase frequency of the resonance unit 190 according to the air flow rate to attenuate the noise according to the noise of the bandwidth.

Description

TECHNICAL FIELD [0001] The present invention relates to an air conditioning system for an automobile,

More particularly, the present invention relates to a vehicular air conditioner, and more particularly, to a vehicular air conditioner having a resonance part for attenuating noise at a position corresponding to the cutoff in a scroll casing provided with a cutoff and a variable part for varying the volume of the resonance part The present invention relates to a vehicle air conditioner for generating a frequency of a reverse phase in accordance with a noise of a bandwidth corresponding to an air flow rate to attenuate noise.

Background Art [0002] Generally, an air conditioner for a vehicle includes a cooling system for cooling an interior of a vehicle and a heating system for heating.

The vehicle air conditioning system includes a blower unit for introducing indoor air (hereinafter referred to as "indoor air") or outdoor air (hereinafter referred to as "outdoor air") of a vehicle, and a blower unit A heater core circulating the high temperature cooling water cooled by the engine and exchanging heat with air to form a warmer; and a heater core disposed between the evaporator and the heater core A mode door that is provided in the door and that mixes warm and cool air appropriately according to the amount of opening to form mixed air, and mode doors that adjust mixed air formed through the tempo door to be discharged in accordance with a mode selected by the user .

1, the blower unit includes a scroll casing 10 having an air inlet chamber 12 and an inlet 14 and an outlet 16, and a scroll casing A blowing motor 30 provided in the scroll casing 10 to provide a rotational force to rotate the blowing fan 20 and a blowing motor 20 provided in the blowing chamber 12 of the scroll casing 10, External switching unit 40 for selectively allowing indoor air or outdoor air to flow into the outdoor unit 14 and a control unit 40 for collecting foreign matter contained in the air introduced between the indoor / outdoor switching unit 40 and the scroll casing 10, And a filter 50 that filters the signal.

The blower unit includes a motor cover 32 fixed to the scroll casing 10 to protect the blower motor 30.

The scroll casing (10) is provided with an upper casing (10a) and a lower casing (10b) which are divided into upper and lower parts.

The scroll casing 10 is provided with a cutoff 18 at a boundary portion between the air blowing chamber 12 and the discharge port 16.

The cutoff 18 includes a bypass passage 182 on the inner side and an inlet 184 for allowing a part of the air to flow into the bypass passage 182. The cutoff 18 is provided at a position corresponding to each of the upper casing 10a and the lower casing 10b of the scroll casing 10. [ In addition, the inlet 184 is provided at one side of the lower casing 10b.

3, after part of the blowing air discharged to the discharge port 16 of the scroll casing 10 enters the inlet 184 of the lower casing 10b, the bypass passage 182 And then enters the motor cover 32 to cool the blower motor 30 provided in the motor cover 32.

However, in the conventional blower unit, by forcing the air to flow by the rotational force of the blowing fan 20, the flow velocity increases along with the pressure drop at the interval between the scroll casing 10 and the blowing fan 20, Collision, and blade passing tone (BPT).

Further, there is a problem that the quietness of the vehicle is lowered due to the noise generated due to the rotation of the blowing fan.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a scroll casing in which a cutoff is provided, a resonance part for attenuating noise at a position corresponding to the cutoff, and a variable part for varying the volume of the resonance part, And an object of the present invention is to provide a vehicle air conditioner which generates a frequency of a reverse phase in accordance with the noise of a bandwidth corresponding to the air volume of the air, thereby attenuating noise.

Another object of the present invention is to provide a plasma display panel having a resonance chamber inside and a resonance chamber in which air is introduced into the resonance chamber at one side of the resonance chamber, And the volume of the resonance chamber is changed by depressing the blocking wall in accordance with the amount of air to attenuate the noise.

It is still another object of the present invention to provide a vehicle air conditioning apparatus that can attenuate noise of a bandwidth in accordance with the air volume of the air by the resonance unit, thereby improving the quietness of the vehicle.

According to an aspect of the present invention, there is provided a vehicular air conditioning system including a blower unit for selectively introducing inside air or outside air to cool and heat a room of a vehicle, wherein the blower unit includes a blowing fan And a scroll casing having an inlet opening through which air is introduced by rotation of the blowing fan and an outlet opening through which air introduced into the other side is discharged; A cutoff for allowing a part of the air to flow into the scroll casing to cool the blowing motor; A resonance unit for attenuating noise included in the air; And a variable unit that varies the reverse phase frequency of the resonance unit according to the air flow rate to attenuate the noise according to the noise of the bandwidth.

In the present invention, it is preferable that the cutoff, the resonance portion and the variable portion are provided at a boundary portion between the blowing chamber and the discharge port.

In the present invention, the resonance section includes a resonance chamber having a space sealed inside, and an opening portion communicating with the outside at one side of the resonance chamber; Wherein the variable portion includes a lifting plate which is located in the opening portion and is equipped with a resonance hole so that air enters the resonance chamber so as to change the volume of the resonance chamber while moving in accordance with the air flow rate of the air, It is preferable to include an elastic member capable of returning.

In the present invention, it is preferable that the opening portion is provided so as to communicate with the bypass passage of the cutoff.

In the present invention, the resonance section includes a resonance chamber having a space sealed inside, and a resonance hole communicating with the outside at one side of the resonance chamber; Wherein the variable portion includes a lift plate provided inside the resonance chamber and changing the volume of the resonance chamber while moving in accordance with the amount of air entering through the resonance hole, It is preferable to include an elastic member.

In the present invention, it is preferable that the resonance hole is provided so as to communicate with the bypass passage of the cutoff.

The present invention also provides a vehicular air conditioning system including a blower unit for selectively introducing inside air or outside air to cool and heat a room of a vehicle, wherein the blower unit is provided with a blowing chamber in which a blowing fan is located inside And a scroll casing having an inlet for introducing air by rotation of the blowing fan and an outlet for discharging the air introduced into the other side of the scroll casing, A cutoff for allowing a part of the air to flow into the scroll casing to cool the blowing motor; And a resonance hole communicating with the outside is provided at one side of the resonance chamber, and the blocking wall having the resonance hole is pushed by a pressing force corresponding to the air volume of the air, so that the volume of the resonance chamber And a resonance part provided with a blocking wall for reducing the noise.

In the present invention, it is preferable that the blocking wall is provided on the side of the discharge port through which the air is discharged.

In the present invention, it is preferable that the blocking wall is provided on the side of the air blowing chamber provided with the blowing fan.

In the present invention, it is preferable that the blocking wall is made of a material that is soft and returns to the original position by its own elastic force.

In the present invention, the scroll casing is provided with an upper casing and a lower casing which are divided into upper and lower parts; It is preferable that either one of the upper casing and the lower casing has a cutoff and the other has a resonance unit.

According to the present invention, there is provided a scroll casing in which a cutoff is provided, a resonance part for attenuating noise at a position corresponding to the cutoff, and a variable part for varying the volume of the resonance part in accordance with the amount of air, There is an effect that the frequency of the reverse phase is generated in accordance with the noise to attenuate the noise.

In addition, a barrier wall having a resonance chamber is provided on the inner side and a resonance hole is formed on one side of the resonance chamber to allow the air to enter the resonance chamber. The barrier wall is made of a material having soft elasticity, The blocking wall is pushed to change the volume of the resonance chamber to thereby attenuate the noise.

In addition, the resonance unit attenuates the noise of the bandwidth in accordance with the air volume of the air, thereby improving the quietness of the vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a blower unit of a conventional automotive air conditioner. FIG.
FIG. 2 is a plan view of a conventional scroll casing and a blowing fan in a coupled state. FIG.
3 is a sectional view taken along line III-III in FIG.
FIG. 4 is a perspective view of the blower unit of the automotive air conditioner according to the first embodiment of the present invention. FIG.
FIG. 5 is a sectional view showing the scroll casing and the blowing fan in a coupled state according to the first embodiment of the present invention. FIG.
6 is a cross-sectional view taken along line VI-VI 'of FIG.
7 is a sectional view taken along line VII-VII 'of FIG. 6;
8 is an enlarged cross-sectional view of a portion of a scroll casing according to a second embodiment of the present invention;
9 is a plan sectional view of the combined state of the scroll casing and the blower fan according to the third embodiment of the present invention.
10 is a sectional view taken along line 'X' - 'X' in FIG.
11 is an enlarged cross-sectional view showing a substantial part of a scroll casing according to a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. (The same reference numerals are used for the same components as the conventional ones, and a detailed description thereof will be omitted).

≪ Embodiment 1 >

A vehicular air conditioning system according to the present invention includes a blower unit for introducing indoor air or outdoor air, an evaporator for cooling indoor air or outdoor air introduced into the vehicle interior by the blower unit to form cold air, A heater core circulating the cooled high temperature cooling water and exchanging heat with air to form a warmer; and a heater core disposed between the evaporator and the heater core to mix the warm air and the cool air appropriately according to the opening amount to form mixed air And a mode door for controlling the mixed air formed through the tempo door to be discharged in accordance with a mode selected by the user.

4, the blower unit according to the first embodiment of the present invention is provided with a blowing chamber 12 on the inner side thereof, a scroll casing 12 having an inlet 14 on one side and an outlet 16 on the other side, A blowing motor 30 for providing a rotational force to the blowing fan 20 and an inlet 14 for introducing the scroll casing 10 (50) provided between the scroll casing (10) and the inside / outside switching unit (40). The inside / outside switching unit (40)

The scroll casing (10) is provided with an upper casing (10a) and a lower casing (10b) which are vertically divided. A filter 50 and an internal / external switching unit 40 are sequentially fixed above the upper casing 10a. 6, a blower fan 20 inserted in the air blowing chamber 12 and a motor cover 32 for supporting the blowing motor 30 are provided below the lower casing 10b.

Further, the lower casing 10b is provided with a cutoff 18 at a boundary portion between the air blowing chamber 12 and the discharge port 16. The cutoff 18 is provided with a bypass passage 182 on the inner side and an inlet portion 184 for allowing a part of air to flow into one side of the bypass passage 182. The bypass passage 182 is provided to communicate with one side of the motor cover 32.

That is, the cutoff 18 causes part of the air discharged to the discharge port 16 to enter the bypass passage 182 through the inlet port 184 and then enter the motor cover 32 along the flow path, Thereby cooling the blower motor 30 supported by the motor cover 32.

The upper casing 10a is provided with a resonance unit 190 at a boundary between the air blowing chamber 12 and the discharge port 16. The resonance unit 190 is provided with a resonance chamber 192 having a space inside. The resonance chamber 192 is provided with an opening 191 at one side so as to communicate with the bypass passage 182 of the cutoff 18.

The opening portion 191 of the resonance unit 190 is provided with a variable portion 200 for varying the volume of the resonance chamber 192 according to the amount of air to attenuate noise in multiple frequency regions.

The variable section 200 includes a lift plate 210 provided inside the resonance chamber 192 and having a resonance hole 212 through which a part of air is introduced into one side of the lift plate 210, And an elastic member 220 provided to provide an elastic force to return the lifting plate 210 to the home position. The resonance hole 212 is preferably provided at the center of the lifting plate 210.

The volume of the resonance chamber 192 and the size of the resonance hole 212 are calculated by the Helmholtz resonance formula.

The operation state of the vehicle air conditioner constructed as described above will be described below.

First, according to the user's choice, air or outside air is introduced through the blower unit, and these air or outside air pass through the evaporator or the heater core to form cold or warm air. Also, these cold air or warm air is appropriately mixed according to the amount of opening of the tempo door, and is discharged to the inside of the vehicle, thereby cooling and heating the inside of the vehicle.

In the blower unit, the blowing fan 20 is rotated by the rotational force of the blowing motor 30 so that the inside air or outside air passes through the inlet port 14 of the scroll casing 10 through the inside / outside switching unit 40 Lt; / RTI >

5, in the interval between the inner wall of the air blowing chamber 12 of the scroll casing 10 and the air blowing fan 20, a pressure drop is generated by the air introduced by the rotation of the blowing fan 20, The flow velocity increases, and voices such as vortex generation, flow collision, and BPT (Blade Passing Tone) are generated.

Then, as shown in FIG. 6, the noise-containing air is discharged to the discharge portion 16, and a part of the air flows into the inlet 184 of the cut-off 18. Part of the air introduced into the inlet 184 flows into the resonance hole 212 of the variable portion 200.

The air flowing into the resonance hole 194 flows into the resonance chamber 192 and changes to a new out-of-phase vibration with respect to the waveform of the standing wave.

Accordingly, the resonance chamber 192 of the resonance unit 190 attenuates noise included in the air by phase cancellation for a specific frequency.

On the other hand, when the air volume of the blowing fan 20 is changed according to the user's selection, the noise frequency generated is different.

The noise having such a bandwidth is attenuated by varying the volume of the resonance chamber 192 in the variable section 200 provided in the resonance section 190.

7, the air introduced through the inlet 184 of the cutoff 18 is pressurized by the lift plate 210 of the variable portion 200 according to the air flow rate of the blowing fan 20. As a result, the volume of the resonance chamber 192 is changed by the distance that the lifting plate 210 is lifted, and the frequency of the phase change is changed by the volume change amount of the resonance chamber 192, .

The resonance chamber 192 is provided with an elastic member 220 for providing an elastic force to the lifting plate 210 so that the lifting plate 210 can be lifted smoothly according to the air flow rate of the blowing fan 20. [ do. Accordingly, a frequency of a reverse phase is provided according to each frequency of the bandwidth according to the air flow rate of the blowing fan 20, thereby attenuating noise.

≪ Embodiment 2 >

The same reference numerals are used for the same components as those in the first embodiment, and a detailed description thereof will be omitted.

The resonance unit 190 according to the second embodiment of the present invention is provided at a boundary portion between the air blowing chamber 12 and the discharge port 16 of the scroll casing 10 as shown in Fig. The resonance unit 190 includes a resonance chamber 192 having a space sealed inside and a resonance hole 192 provided at one side of the resonance chamber 192 and communicating with the bypass passage 182 of the cut- 194 are provided.

The resonance unit 190 is provided with a variable portion 200 for changing the volume of the resonance chamber 192.

The variable portion 200 is provided with a lifting plate 210 provided in the resonance chamber 192 and an elastic member 220 for providing an elastic force to return the lifting plate 210 to the home position.

Accordingly, a part of the air discharged to the discharge port 16 enters the bypass passage 182 through the inlet 184 of the cutoff 18. Part of the air thus entered enters the resonance chamber 192 through the resonance hole 194 of the resonance unit 190.

At this time, the resonance chamber 192 is provided with the lift plate 210 of the variable portion 200, and the lift plate 210 is raised by the pressurization of the incoming air.

Thus, the volume of the resonance chamber 192 is changed by the rising height of the lifting plate 210, so that a frequency of a reverse phase is generated in accordance with the frequency noise of the bandwidth to attenuate the noise.

≪ Third Embodiment >

The same reference numerals are used for the same components as those in the first embodiment, and a detailed description thereof will be omitted.

As shown in Fig. 9, the scroll casing 10 according to the third embodiment is provided with a blowing chamber 12 on its inner side, an inlet 14 on one side, and a discharge port 16 on the other side Respectively. The scroll casing (10) is provided with an upper casing (10a) and a lower casing (10b) divided into upper and lower parts.

A cut-off 18 and a resonance unit 190 are provided at the boundary between the air blowing chamber 12 and the discharge port 16.

That is, the cutoff 18 is provided in the lower casing 10b, and the resonance unit 190 is provided in the upper casing 10a.

The resonance unit 190 is provided with a resonance chamber 192 having a space sealed inside and a resonance hole 194 communicating with the outside is provided at one side of the resonance chamber 192.

Also, it is preferable that the resonance hole 194 is provided on the side of the discharge port 16 through which air is discharged.

In addition, the blocking wall 196 provided with the resonance hole 194 is made of a soft and elastic material. The blocking wall 196 serves as a variable portion that changes the volume of the resonance chamber 192 as it is pushed toward the resonance chamber 192 according to the air flow rate.

Referring to FIG. 10, a part of the air discharged through the discharge port 16 flows into the resonance hole 194 of the resonance unit 190. At this time, the blocking wall 196 is pushed toward the resonance chamber 192 due to the pressing force according to the air flow rate.

Accordingly, the volume of the resonance chamber 192 is changed by the pushed area of the blocking wall 196, thereby attenuating the noise according to the frequency noise of the bandwidth.

Further, the blocking wall 196 is returned to its original position when it is not influenced by the air volume due to the elastic force.

<Fourth Embodiment>

The same reference numerals are used for the same components as those of the third embodiment, and a detailed description thereof will be omitted.

The resonance unit 190 according to the fourth embodiment is provided with a resonance chamber 192 having an inner space sealed therein and a resonance chamber 192 having a resonance hole 194 communicating with the outside at one side of the resonance chamber 192 A wall 196 is provided.

The blocking wall 196 is provided on the side of the air blowing chamber 12 where the blowing fan 20 is provided.

Accordingly, a part of the air generated by the rotation of the blowing fan 20 enters the resonance hole 194. At this time, the blocking wall 196 is pressed by the amount of the air, so that the blocking wall 196 is pushed by the resonance chamber 192 to change the volume of the resonance chamber 192.

That is, the volume of the resonance chamber 192 is changed by the pushed area of the blocking wall 196, thereby attenuating the noise according to the frequency noise of the bandwidth.

The above description is only one example for implementing the air conditioner for a vehicle, and the present invention is not limited to the above embodiment. It will be understood by those skilled in the art that various changes may be made without departing from the spirit of the invention.

10: scroll casing 10a: upper casing
10b: lower casing 12: air blowing chamber
14: inlet port 16: outlet port
18: Cut Off 182: Bypass passage
184: inlet 20: blowing fan
30: blower motor 32: motor cover (motor cover)
40: internal / external conversion unit 50:
190: Resonance section 191: Open section
192: Resonance room 194, 212: Resonance ball
196: blocking wall 200: variable portion
210: lifting plate 220: elastic member

Claims (12)

1. A vehicle air conditioning system including a blower unit for selectively introducing air or outside air to cool and heat the inside of a vehicle,
The blower unit is provided with an air blowing chamber 12 in which a blowing fan 20 is located inside and includes an inlet 14 through which air is introduced by the rotation of the blowing fan 20, And a scroll casing (10) provided with an outlet (16) for allowing air to escape;
The scroll casing (10) is provided with a cutoff (18) for allowing a part of the air to flow to cool the blowing motor (30);
A resonance unit 190 for attenuating noise included in the air; And
And a variable unit (200) for varying the reverse phase frequency of the resonance unit (190) according to the air flow rate to attenuate the noise according to the noise of the bandwidth,
The resonance unit 190 includes a resonance chamber 192 having a closed space inside and an opening 191 communicating with the outside at one side of the resonance chamber 192;
The variable portion 200 is disposed in the opening portion 191 and includes a resonance hole 212 for allowing air to enter the resonance chamber 192, And a resilient member (220) capable of returning to the original position by applying an elastic force to the lifting plate (210). The method according to claim 1,
Wherein the cutoff (18), the resonance unit (190), and the variable portion (200) are provided at a boundary portion between the air blowing chamber (12) and the discharge port (16). delete The method according to claim 1,
Wherein the opening portion (191) is provided so as to communicate with the bypass passage (182) of the cutoff (18). 1. A vehicle air conditioning system including a blower unit for selectively introducing air or outside air to cool and heat the inside of a vehicle,
The blower unit is provided with an air blowing chamber 12 in which a blowing fan 20 is located inside and includes an inlet 14 through which air is introduced by the rotation of the blowing fan 20, And a scroll casing (10) provided with an outlet (16) for allowing air to escape;
The scroll casing (10) is provided with a cutoff (18) for allowing a part of the air to flow to cool the blowing motor (30);
A resonance unit 190 for attenuating noise included in the air; And
And a variable unit (200) for varying the reverse phase frequency of the resonance unit (190) according to the air flow rate to attenuate the noise according to the noise of the bandwidth,
The resonance unit 190 includes a resonance chamber 192 having a space sealed inside and a resonance hole 194 communicating with the outside at one side of the resonance chamber 192;
The variable portion 200 is provided inside the resonance chamber 192 to change the volume of the resonance chamber 192 while moving according to the air volume of air entering through the resonance cavity 194 210), and an elastic member (220) capable of returning the steel plate (210) to an original position by applying an elastic force to the steel plate (210). The method of claim 5,
Characterized in that the resonance hole (194) is provided so as to communicate with the bypass passage (182) of the cutoff (18). 1. A vehicle air conditioning system including a blower unit for selectively introducing air or outside air to cool and heat the inside of a vehicle,
The blower unit is provided with an air blowing chamber 12 in which a blowing fan 20 is located inside and includes an inlet 14 through which air is introduced by the rotation of the blowing fan 20, And a scroll casing (10) provided with an outlet (16) for allowing air to escape;
The scroll casing (10) is provided with a cutoff (18) for allowing a part of the air to flow to cool the blowing motor (30);
And a resonance hole 194 communicating with the outside is provided at one side of the resonance chamber 192. The blocking wall 196 having the resonance hole 194 is provided at one side of the resonance chamber 192, And a resonance unit 190 having a blocking wall 196 for reducing the volume of the resonance chamber 192 and attenuating the resonance chamber 192 according to the noise of the bandwidth, The air conditioning system comprising: The method of claim 7,
Wherein the cutoff (18) and the resonance unit (190) are provided at a boundary portion between the air blowing chamber (12) and the discharge port (16). The method of claim 7,
Wherein the blocking wall (196) is provided on a side of an exhaust port (16) through which air is discharged. The method of claim 7,
Wherein the blocking wall (196) is provided on the side of the air blowing chamber (12) where the blowing fan (20) is provided. The method according to any one of claims 7 to 10,
Characterized in that said blocking wall (196) is made of a material that is soft and returns to its original position by its own elastic force. 1. A vehicle air conditioning system including a blower unit for selectively introducing air or outside air to cool and heat the inside of a vehicle,
The blower unit is provided with an air blowing chamber 12 in which a blowing fan 20 is located inside and includes an inlet 14 through which air is introduced by the rotation of the blowing fan 20, And a scroll casing (10) provided with an outlet (16) for allowing air to escape;
The scroll casing (10) is provided with a cutoff (18) for allowing a part of the air to flow to cool the blowing motor (30);
A resonance unit 190 for attenuating noise included in the air; And
And a variable unit (200) for varying the reverse phase frequency of the resonance unit (190) according to the air flow rate to attenuate the noise according to the noise of the bandwidth,
The scroll casing (10) is provided with an upper casing (10a) and a lower casing (10b) which are divided into upper and lower parts;
Wherein at least one of the upper casing (10a) and the lower casing (10b) has a cutoff (18), and the resonance unit (190) is provided at the other of the upper casing (10a) and the lower casing (10b).

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