JPS6288606A - Air conditioning device for car - Google Patents

Abstract

PURPOSE:To simplify construction and make an operation light and smooth by incorporating an air passage branching duct in which a fluid control device is used for a blow-out selecting means, in the captioned air conditioning device having plural blow-out ports. CONSTITUTION:A first fluid control device A and a second fluid control device B are incorporated inside a blow-out port unit part 1C, to divide an air passage into two. The fluid control device A is branched and connected to a ventilation blow-out port 50 and to the introducing passage 30 of the second fluid control device B. Part of air which enters an air introducing passage 10 in the fluid control device A, flows in the directions of the arrows (p), (q) via a branching port 16 and a control chamber 17. And, an air quantity (p) is controlled by means of a control nozzle 18, adjusting a Coanda effect, and the flow of conditioned air from a main nozzle 11 is controlled to be flows as shown by the arrows (a), (b), to change the blow-out directions. The fluid control device B also has a similar construction. Thereby, construction can be simplified while operation becomes light and smooth.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an air conditioner for an automobile that uses a fluid element as a means for selecting which of a plurality of air outlets is used to blow out conditioned air. Regarding.

[Prior Art] A conventional air conditioner for an automobile generally has a structure as shown in a schematic cross-sectional view in FIG. 100 in the figure is a cylindrical air-conditioning duct that also serves as the housing of the device, and there is an outside air inlet 101 and an inside air inlet 102 at the inlet end of the conditioned air, and an air-conditioned air inlet 101 and an inside air inlet 102 at the outlet end. a pendeletion outlet 110 as an air outlet;
A heat outlet 120 and a defrost outlet 130 are provided, respectively. 103 is a damper for switching between inside and outside air; 10
4 and 105 are blower fans and motors, 106 and 107 are heat exchangers for cooling and heating, respectively, 108 is an air mix damper for adjusting the temperature of the blown air, 111.1
Reference numerals 21 and 131 are a vent damper, a heat damper, and a differential damper for opening and closing the air outlets 11G, 120, and 130, respectively.These dampers are placed in a specific 'M dynamic relationship via a link mechanism, etc. By operating the air conditioning mode switching lever provided on the panel surface to open and close the desired state, for example, in the heating mode, the mff1 is blown out from the heat outlet opening toward the bottom of the passenger compartment, and in the cooling mode, the mff1 is blown out above the passenger compartment. By blowing cold air from the pendeletion outlets that open towards the body area, the temperature distribution inside the vehicle cabin is controlled to improve the feeling of warmth or coolness.

[Problems to be Solved by the Invention] The conventional air conditioners for automobiles as described above do not necessarily reach a satisfactory level both structurally and functionally. In other words, in Tochi Hematopoietic Co., Ltd., the interlocking mechanism of Moe's damper group has to be considerably complicated, resulting in a cost disadvantage.In terms of functionality, when operating the air conditioning mode switching lever, the link mechanism is discontinuous. The resistance to the operating force changes during the movement process, which creates an awkward operating sensation and, especially in the case of high-grade cars, the problem is that the luxury mood is spoiled. Ta.

Another undesirable point is that if the lever is operated too vigorously, the damper collides with the end of its rotation, producing a loud noise.

On the other hand, for heat pump type air conditioners that are not used in automobiles but are installed on the indoor walls of buildings, the Coanda effect is a method for deflecting the air blowing direction to a certain extent from a blowout grille that is fixedly installed diagonally downward. The technology to incorporate a fluidic element behind this grill using
It is disclosed as ``Special Publication No. 60-4369''. The feature of this technology is the flow direction control plate installed in the main nozzle.

The present invention provides a novel method for selectively blowing out conditioned air from one of a plurality of outlets of an automobile air conditioner, by using a fluid element in place of a conventional damper for opening and closing the outlet. An object of the present invention is to provide an air conditioner for an automobile that has a simplified structure and allows light and smooth operation of an air conditioning mode switching lever or knob.

[Means for Solving the Problems 1] In order to achieve the above-mentioned object, the automotive air conditioner of the present invention includes an inlet and an outlet for conditioned air, and
an air conditioning duct having a built-in air conditioning heat exchanger, a blower, and a blowout air temperature control means; and an air conditioning duct connected to the blowout outlet;
At least one tank having a plurality of indoor air outlets, interposed between the air outlet and the plurality of indoor air outlets, and selectively blowing out conditioned air from any one of the plurality of indoor air outlets. A configuration consisting of an air path diversion duct incorporating two fluid elements and a wind direction deflection control mechanism for the fluid elements was adopted.

[Operation 1] The device of the present invention having the above configuration is introduced into an air-conditioning duct from the suction port by the suction force and discharge force of the blower, and is forced to pass through the air-conditioning heat exchanger and the blowing air temperature control means. Conditioned air is fed into a first fluid element interposed upstream of a plurality of indoor air outlets, and is selectively directed toward one of the element's two branch air outlets by a wind direction deflection actuation control mechanism of this element. be deflected,
The air is blown out from the first indoor air outlet of the device provided downstream.

When a second fluid element is provided downstream of the other flow path of the two above-mentioned two branch flow paths, when the first fluid element is operated to deflect the wind direction toward the other flow path, The conditioned air that has flowed into the second fluid element is selectively deflected toward one of the two branch outlet passages of the second element in the same manner as when it has flowed into the first fluid element. Air is blown into the vehicle interior from either the second or third indoor air outlet of the device provided downstream of the air outlet.

[Example] A specific configuration of the present invention will be described below based on an example shown in the accompanying drawings.

1 and 2 are a perspective view including a partially broken surface showing the overall structure of an embodiment of the device, and an enlarged vertical sectional view of a fluid element, in which the air conditioning duct is an evaporator 5 serving as a cooling heat exchanger. It consists of a heat exchange unit part 1A containing a heater core 6 as a heating heat exchanger, and a blower unit part 1B containing a blower fan 1, and a first fluid element A and a second fluid are connected to the air outlet 1d. An air outlet unit portion 1C serving as an air path diversion duct into which element B is incorporated is connected.

At the upstream end of the heat exchange unit portion 1A as a short cylindrical duct, there are an outside air inlet 2, an inside air inlet 3, and an inside/outside air switching damper 4 for selectively opening and opening these eye inlets. At the end, an air mix damper 8 is provided as a ventilation control plate, which has the role of adjusting the temperature of the heat-exchanged air by changing the ratio between the air passing through the evaporator 5 and the air passing through the heater core 6. It is being The air mix damper 8, which is shaped like a square plate, is arranged such that its edge facing the rotating shaft 8a is close to the intake port 1b of the blower unit portion 1B, which is a blower equipped with a square-shaped casing. It's being passed around.

An arcuate partition plate 9 is attached to the scroll portion of the blower unit portion 1B so as to divide the ventilation path into two in the air flow direction. Air mix damper 8 assembled with
The hot air and cold air that flowed into the air intake port 1b of the blower due to the suction force of the blower while being separated by the blower continue to maintain this separated state while being separated by the air outlet connected to the air outlet 1d of the blower unit portion 1B. It is fed into the unit part 1C.

A first fluid element A and a second fluid element B for dividing the air path into two paths are incorporated inside the outlet unit portion 1C. One branch outlet of this first fluid element A connects to a pendelage outlet 50 as one of the indoor outlets, and the other branch outlet further connects two air channels.
It is connected to the air introduction channel 30 of the second fluidic element B for dividing into channels.

One branch outlet of the second fluid element B is connected to a heat outlet 51 as a second indoor outlet, and the other branch outlet is connected to a defrost outlet 52 as a third indoor outlet. It is connected to the defrost duct 53.

The detailed structure of the first fluid element A is shown in FIG. 2 as a side sectional view, in which a slit-shaped main nozzle 11 is provided at the tip of the air introduction path 10.
Was it spit out? After the airflow passes through a control chamber 12 for deflecting wind direction, it is blown out from a slit-shaped outlet 13 to a downstream ventilation path. And this slit-shaped air outlet 1
The lower sides of the wind deflection plates 14 and 15, each forming an outwardly expanding circular arc surface, are connected to the opposing opening edges of the wind deflection plates 150, and the radius of curvature of the circular arc surface of the wind deflection plate 150 is
is set larger than that of . Also, the wind direction deflection plate 14
, a fume slit 19 is provided at the outlet 13 for generating a fume stream approximately parallel to the plate surface in the direction of the blowing air flow.
A plurality of strips are provided in a direction parallel to the mouth edge of the wind deflection plate 14, and are supplied with pressurized air from an air chamber 25 connected to the back surface of the wind direction deflection plate 14 and communicating with the air introduction passage 10.

The control chamber 12 for wind direction deflection has a control nozzle 18 for blowing out air for wind direction deflection at one end, and an atmosphere communication port 24 at the other end, and the control nozzle 18 is connected to the control air chamber. 17, it is connected to a control air distribution port 16 provided on the side wall of the air introduction path 10.

Inside the control chamber 12 are two valve bodies 20 and 2 for opening the atmosphere communication port 24 when the control nozzle 18 is opened and for opening the atmosphere communication port 24 when the control nozzle 18 is opened.
A reciprocating motion is applied to the valve stem 22 by a reciprocating motion generating mechanism 23 serving as a wind direction deflection control mechanism for the fluid element.

The structure of the second fluidic element B connected to the other branch of the first fluidic element A is also essentially the same as that of the first fluidic element B as depicted in FIG.
It is exactly the same as the fluid element A of .

That is, in FIG. 1, 30 is an air introduction path, 31 is a main nozzle, 32 is a control chamber for wind direction deflection, 33 is an air outlet, 34 and 35 are wind deflection plates each having a deflection surface with a different radius of curvature, and 36 is a control chamber. Air distribution port, 37 is a control nozzle, 38
is a valve body for opening and closing the control nozzle 37, 39 is a valve stem, 40 and 4
1 is an atmosphere communication port and a valve body for opening and closing the same. Reference numeral 42 denotes a second reciprocating motion generating mechanism that controls the operation of the valve stem 39, which has the function of determining whether the air that has entered the second fluid element B is blown out from the heat outlet 51 or the defrost outlet 52. , 43 are fume slits provided in the wind direction deflection plate 34.

The outlet ports 13 and 33 of each of the first and second fluid elements A and 8 are provided with a separator 25 or 45 at some distance, respectively, to help ensure that the airflow is deflected. ing.

FIG. 3 is a front view of the operation panel of the device, and the panel surface 60 shows the settings for changing the air conditioning mode, that is, the pendeletion outlet 50, the heat outlet 51, and the defrost outlet 5.
An air conditioning mode switching lever 61 for selecting and switching which conditioned air is blown out; and a lever 62 for adjusting the temperature of the blown air; A lever 63 for switching between inside and outside air and a lever 64 for switching the air blowing capacity of the blower fan 7 are provided. Reference numbers with a lowercase letter a indicate guide rails for each lever with a corresponding reference number.

Next, the operation of the above embodiment device will be explained using the operation panel surface 60.
By the air conditioning mode switching lever 61 provided in
VE, NT (ventilation) blowout mode, HEAT
or OFF (defroster) blowout mode and BI-
LEVEL (pie level) When switching to four blowout modes, each mode will be individually explained.

[Ventilation blowout mode 1 Move the air conditioning mode switching lever 61 to ■ENT shown in Fig. 3.
When set to the mark position, operation information is transmitted from the lever displacement detection means (not shown) such as a microphone [1 switch] that senses the displacement of the lever to the reciprocating motion generating mechanism 23 consisting of a negative pressure actuator, a servo motor, etc. As a result, the valve stem 22 moves to the right in FIG. 2 to a position where the valve body 20 opens the control nozzle 18 and the valve body 21 closes the atmosphere communication port 24.

The air to be conditioned is introduced into the unit from the outside air intake port 2 or the inside air intake port 3 by the suction force of the blower fan 7 by operating the inside/outside air switching lever 63. As shown in FIG. 1, the air mix damper 8 is moved between the HAX WARM position, which fully closes the outlet of the cooling evaporator 5, and the HAX CO2 position, which fully closes the outlet of the heating heater core 6. When occupying the intermediate position, the warm air that has passed through the heater core 6 and has been warmed, and the cold air that has passed through the evaporator 5 and been forcibly cooled during cooling operation.
The air outlet 1d of the blower unit part 1B receives the flow dividing force from the air mix damper 8, the partition plate 9 provided in the blower school section, and the blower fan 7, respectively.
From there, cold air is blown out toward the upper region (in FIG. 2) of the air introduction path 10 of the outlet unit portion 1C, and warm air is blown out into the lower region in a separated state.

A part of the air that has entered the air introduction passage 10 is transferred from the control air branch 016 provided in this ventilation passage to the control air chamber 17.
After flowing into the air, it is blown into the air deflection control chamber 12 from the open control nozzle 18 as shown by the arrow (A) in the figure. For this purpose, the main nozzle 1 is
1 and blown into the control room 12,
The air is pushed toward the wind deflection plate 15 on the right side of the figure, and due to the Coanda effect, the air flows out along the arcuate surface of the wind deflection plate 15, as indicated by the broken line arrow, and in the process of following this flow, the temperature increases. The cold air is mixed and pushed out by air blowing pressure toward the ventilator air outlet 50 located downstream, thereby realizing the ventilation blowing mode. As described above, the radius of curvature of the wind direction deflection plate 15 is set to be larger than that of the wind direction deflection plate 14 located at the opposite position, so that such air flow deflection can be performed more easily and reliably.

[Heat or differential zero star blowout mode] When the air conditioning mode switching lever 61 is moved to the HEAT or DFF mark position attached along the guide rail 61a of the lever,
The valve stem 22 is moved to the left in FIG. 2 by the same mechanism as described above, so the control nozzle 18 is closed by the valve body 20, and the valve body 21 opens the atmosphere communication port 24 and is used for wind deflection. The control chamber 12 is in a negative pressure state with respect to the air introduction path 10.

The air that has entered the air introduction path 10 in the same manner as in the Suita mode is discharged from the main nozzle 11 into the control chamber 12, but is not subjected to the deflecting force of the control nozzle 18 (
It is blown out from the slit-shaped outlet 13.

Of the wind deflection plates 14 and 15 provided in the green portions of the slit on both sides, the radius of curvature of the wind deflection plate 14 is set to be smaller than that of the wind deflection plate 14, so the Coanda effect appears more strongly on the wind deflection plate 14 side. The blown air flow becomes a flow that adheres to the wind direction deflecting plate 14 side as shown by the solid line arrow a in FIG. 2, and is blown toward the second fluid element B located downstream thereof. The airflow toward the ventilation outlet 50 is then lost, but since the second fluid element B exerts a large ventilation resistance on the blown airflow a, the airflow adhering to the wind direction deflection plate 14 is reduced. There is a tendency for the part a to peel off in the middle and turn to the ventilator outlet side where there is less ventilation resistance.

As a measure to prevent the occurrence of such a phenomenon, the fluid element used in the device of the present invention has a blowing air that is attached to the wind direction deflection plate 14 and is approximately parallel to the flow direction of the air flow, in order to supplement the Coanda effect. A method was devised to provide a group of fume slits 19 so that flows could be formed separately. Wind direction deflection plate 1
4 is connected to an air chamber 25, and this air chamber is connected to an air introduction passage 10 via a controlled air chamber 17 and a controlled air distribution port 16, and this introduction passage 10 serves as a source of the jet flow. ing. The airflow ejected from the fumarole slit 19 as shown by the arrow ([1)] exerts a suction force on the attached airflow a flowing along the wind direction deflection plate 14, thereby reducing the airflow a resulting from the ventilation resistance on the downstream side. This serves to prevent the wind deflector from separating from the wind deflector plate 14.

In this way, all the air that has flowed into the first fluid element flows into the air introduction passage 30 of the second fluid element B by the action of the wind direction deflection plate 14 and the jet slits 19 provided in this deflection plate. , a first reciprocating motion generating mechanism 23 placed in an interlocking relationship with respect to the movement of the air conditioning mode switching lever 61.
Similarly, the heat outlet 51 or The air is selectively blown out to either one of the defrost outlets 52. This second
The manner of operation of the first fluid element B is the same as that of the first fluid element A, so a description thereof will be omitted.

[Pie level blowing mode] When the air conditioner is in heating operation, cold air is blown into the upper space of the vehicle interior, and mff1 is blown into the lower space of the vehicle to create a cold head and foot heat condition, which is considered to be the ideal air conditioning temperature distribution. air conditioning mode. Set the air conditioning mode switching lever 61 to BI-1, EVF shown in FIG.
A ventilation outlet that opens toward the center or upwards of the vehicle interior so that by moving it to any position within the range indicated by the l-mark, each person can have a cold head and feet warm condition according to their preference. Cooler air flows from 50, and heat outlet 5 opens at the bottom of the vehicle interior.
Warmer air is blown out from 1.

Under this blowing mode, the valve stem 2 to the first fluid element
2 is reciprocated little by little in response to the above-described operation of the air conditioning mode switching lever 61, thereby finely adjusting the opening degrees of the control nozzle 18 and the atmosphere communication port 24 relative to each other. Accordingly, the control air pressure and wind direction deflection control chamber 12 are blown out from the control air chamber 17 through the control nozzle 18.
The pressure difference between the air pressure inside and the air pressure inside also changes, and the wind direction deflection force by the control nozzle 18 is continuously varied between zero and maximum capacity. Therefore, the direction of the air blowing from the air outlet 13 is either the direction toward the second fluid element B indicated by the arrow a in FIG. 2, or the direction toward the ventilation outlet 50 indicated by the arrow. Instead of just one side, it is now possible to take any direction in between, and with the help of the separator 25, the air is separated into two layers: hot air and cold air, as mentioned above. The air flowing into the air introduction path 10 under the
The hot air can be divided to the second fluid element B side guided by the wind deflection plate 14, and the cold air can be divided to the ventilation blowout side guided by the wind deflection plate 15, with an arbitrary ffl distribution ratio.

The warm air flowing into the second fluid element B detects the movement of the air conditioning mode switching lever 61, and the second reciprocating motion generating mechanism 42 is activated to activate the function of the wind direction deflection plate 35. The whole set is heat outlet 5.
The desired pie level Suita mode, which is deflected toward 1, is realized.

In the device of the above embodiment, the blower unit portion 1B is provided downstream of the heat exchange unit portion 1A, but a configuration in which this positional relationship is reversed is also possible. Furthermore, if the number of fluid elements used is increased, the conditioned air can be selectively blown out from more indoor air outlets. Furthermore, the design of the wind direction deflection mechanism of the fluid element can be changed in various ways by combining known techniques.

[Effect of the Invention 1] The device of the present invention having the above-mentioned configuration has a plurality of air outlets that have been used in conventional devices as a means for selecting which of the plurality of indoor air outlets is used to blow out the air conditioned air. Since a fluid element is used in place of the Kirishikawa damper, there is no need for an extremely complicated link mechanism for opening and closing a plurality of damper groups while maintaining a specific relationship.

In addition, since the wind direction deflection control il1 mechanism of the fluid element can be remotely controlled electrically, the problem of the awkward feeling and noise generated during operation, as mentioned at the beginning, when remotely manually operating the link mechanism for opening and closing the damper, can be solved. .

Furthermore, as an effect of the embodiment device according to the present invention, by providing the blower slit in the wind direction deflection plate of the fluid element, when two or more fluid elements are arranged in series upstream of the indoor air outlet, the downstream side This solves the problem that the Coanda effect of the upstream fluid element is reduced by the ventilation resistance of the fluid element, making it difficult to reliably divide the airflow.

[Brief explanation of drawings]

1 to 3 relate to a device according to an embodiment of the present invention, in which FIG. 1 is a perspective view including a partially broken surface, FIG. 2 is an enlarged vertical sectional view of the incorporated fluidic element, and FIG. Figure 3 is i
FIG. 3 is a front view of the ta operation panel. FIG. 4 is a schematic cross-sectional view of a conventional air conditioner for an automobile.

Claims (1)

[Scope of Claims] 1) An air-conditioning duct that is provided with an inlet and an outlet for conditioned air and also has a built-in air-conditioning heat exchanger, a blower, and a blow-out air temperature control means, and is connected to the outlet. , having a plurality of indoor air outlets and interposed between the air outlet and the plurality of indoor air outlets, at least one for selectively blowing out conditioned air from any one of the plurality of indoor air outlets. An air conditioner for an automobile, comprising: an air path diversion duct incorporating one fluid element; and a wind direction deflection control mechanism for the fluid element. 2) The side wall for deflecting wind direction of the fluid element is provided with a jet slit for generating an air flow for preventing separation of jets adhering to the side wall surface. air conditioner for automobiles. 3) The fume slit is communicated with the control flow supply path of the element, and is provided so that the direction of the fume from the slit is approximately parallel to the direction of the air flow flowing in contact with the side wall surface. The second claim characterized in that
The air conditioner for automobiles described in Section 1. 4) Conditioned air is blown out simultaneously from two of the plurality of indoor air outlets by controlling the flow rate of the controlled flow of the element.
The air conditioner for an automobile according to any one of items 1 to 3.