JPH0549503B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a direction-switchable air outlet for an air conditioner installed in an automobile, which applies the working principle of a liquid element.

[Prior art] As a method of blowing out conditioned air into the cabin of a passenger car, the airflow from the defroster outlet has excellent long-distance and tends to generate circulating airflow that spreads throughout the cabin. It has been found that it is preferable to use this defroster outlet even when in circulation mode, but since the defrost airflow blows up along the glass surface from the bottom edge of the windshield, it can increase the humidity when not cooling the windshield. There is a drawback that condensation occurs on the inner surface of the glass due to the inside air that it contains, so a so-called third air conditioning air outlet is provided, which is blown toward the ceiling at a distance slightly away from the glass surface by the defrost airflow. Movement can be seen. The same thing can be said about dew condensation on the outer surface of the windshield during cooling. However, providing this third air outlet results in a result that is contrary to the direction of reducing the number of parts for vehicle assembly, reducing vehicle weight, and reducing costs.

[Problems to be Solved by the Invention] The automotive air conditioner of the present invention solves the problems described in the prior art section by incorporating a wind direction deflection mechanism that applies the working principle of a fluid element into a conventional defroster. Without the need to provide a third air conditioning air outlet, the defrost airflow flows from the defrost outlet to the inside of the vehicle at a slight angle inward from the defrost airflow, eliminating the risk of condensation on the glass surface and providing a defrost ventilation function. The purpose of the present invention is to provide an air outlet that can switch between and blow out a third air conditioned air flow (hereinafter referred to as VENT mode) that is as excellent as the air flow.

[Means for solving problems]

The automotive air conditioner of the present invention has a slit-shaped nozzle on the bottom surface for blowing out air supplied from the air conditioner, and has an opening on the top surface for discharging the air injected from the nozzle into the vehicle interior. the air box is attached to both mouth edges of the discharge opening parallel to the slit direction so that both convex curved surfaces face each other and at least one lower end protrudes into the air box; A side of the air box that is separated by two wind deflection plates each having an arcuate cross-section and a different curvature, and the wind deflection plate installed such that at least one of the lower ends protrudes into the air box. It consists of a communication port to the atmosphere formed at the end and an opening/closing mechanism attached to the communication port, and
One of the wind deflection plates is oriented toward the windshield, and the other is oriented toward the upper portion of the vehicle interior.

According to a preferred embodiment of the present invention, both of the two wind deflection plates are attached such that their lower ends protrude into the air box, and the lower ends of the two wind deflection plates are attached to the air box. The inward protruding lengths are different, and the opening/closing mechanism is configured to be able to continuously change the degree of opening of the communication port to the atmosphere.

[Action and effect of invention]

The automobile air conditioner having the above configuration has the following effects.

(a) Structure applying the principle of liquid element The device of the present invention has a configuration in which a simple airflow direction deflection mechanism is added to a conventional defroster outlet. As described in the prior art section, the ideal vehicle interior ventilation flow
Since it can also serve as the outlet for VENT mode airflow, there is no need to install a new outlet exclusively for VENT mode, making it possible to significantly improve the interior comfort of the vehicle without increasing the product price or vehicle weight. Become. At the same time, the problem of condensation on the windshield during heating and cooling can be resolved.

(b) Even if heating is performed in internal air circulation mode,
In particular, since dew condensation does not easily form on the windshield, it is possible to refrain from introducing outside air, which can greatly contribute to improving the problem of insufficient heating capacity in cold regions or in diesel engines where the rate of increase in engine cooling water temperature is low. .

[Example] Next, an automotive air conditioner according to the present invention will be described based on an example shown in the drawings.

First, the state in which the device of the present invention is mounted on a passenger car will be explained with reference to FIG. 1, which is a side view of the device. The lower surface of the device A of the present invention is connected to the defroster duct E of the vehicle air conditioning unit D. In the figure, F is a blower for introducing outside air, G is an evaporator for cooling, H is a heater core for heating, I is an air mix damper, and J and K are ducts for blowing conditioned air into the vehicle interior. In the device A of the present invention, the blowing direction of the air conditioned air, which will be described later, is set to the direction of the defrosting air along the windshield as shown by the arrow A in the figure, and the direction of the defrost air along the windshield as shown by the arrow B in the figure. Solenoid valve 9 has the role of switching between the VENT airflow direction and the VENT airflow direction that is tilted toward the inside of the vehicle.
is attached.

Next, the configuration of the device of the present invention will be explained with reference to FIG. 2, which is a schematic side sectional view, and FIG. 3, which is a perspective view including a partially broken surface. The constituting air box 1 is provided with a slit-shaped nozzle 2 on its bottom surface to blow out the conditioned air sent from the air conditioned air delivery duct E into the box. A discharge port 3 for injected air into the vehicle interior is opened on the top surface of the vehicle. And slit-shaped nozzle 2
Two arcuate wind deflection plates 4 and 5 having different curvatures along the entire length are provided on both edges of the air outlet 3 on the side parallel to the slit, which are provided in a positional relationship opposite to the slit. However, the lower end portions 4a and 5
It is attached so that a protrudes into the air box 1. By protruding these two wind deflection plates into the air box, the inner space of the air box 1 is divided into three spaces, and the spaces 6 and 7 at both ends are divided into three spaces. This is a part that functions as an air chamber for deflecting the wind direction of a rectifying element in terms of fluid mechanics, and in this embodiment, a communication port 8 to the atmosphere is provided on one wall of one of the air chambers 6. The communication port 8 is opened and closed by an attached solenoid valve 9. 11 is an air inlet;
10 is a valve body. 12 is a cover body for connecting the defroster duct E and the slit nozzle 2;
3 is a spacer between the two wind deflection plates. Note that the atmosphere inlet 11 is connected to an air filter (not shown).

Next, we will move on to an explanation of the mechanism and method of operation of the device of the present invention with reference to FIG. 1 and FIG. A solenoid valve 9 is used to close the communication port 8 to the atmosphere, which is normally open, in conjunction with the opening operation of the damper.
works. The conditioned air blown into the slit-shaped nozzle 2 via the duct E becomes a condensation flow by passing through this nozzle and passes between the two air chambers 6 and 7 for wind direction deflection, but at this time, the air chamber Since the atmosphere communication port 8 attached to 6 is closed, the communication status of the two air chambers to the atmosphere is the same, and the air in both air chambers is caught in the passing air flow to the same degree, so there is no wind direction deflection. It passes through this part without receiving any acting force. The ejected air that reaches the lower ends of both wind deflection plates blows up while drawing in the air on the surfaces of both deflection plates 4 and 5, but the radii of curvature R1 and R2 of the two arc-shaped plates are not the same. Since the relationship R1>R2 is predetermined, air entrainment between the surfaces of both deflection plates occurs more on the surface of the deflection plate 4, and as a result, the surface of the deflection plate 4 is larger than the surface of the deflection plate 5. The airflow ejected from the slit nozzle 2 due to the so-called Coanda effect is forcibly deflected toward the deflection plate 4 and blows up along the windshield surface, creating a defrost mode airflow. is obtained.

In addition, when you want to obtain the VENT ventilation mode, which has the ability to blow up air diagonally upward from some distance from the front of the windshield, and without worrying about condensation on the glass surface even during air conditioning, you can use the operation panel installed on the instrument panel A. The solenoid valve 9 is operated to open the atmosphere communication port 8. When the atmosphere communication port 8 is open, of the two air deflection air chambers 6 and 7, the air chamber 7 that cannot receive air replenishment receives a greater depressurizing force from the passing airflow. , the ejected airflow from the slit-shaped nozzle 2 is stopped on the side of the air chamber 7 and approaches the wind direction deflection plate 5, and the curvature radius R of the wind direction deflection plate 5
2 is smaller than the radius of curvature R1 of the wind deflection plate 4, the above-mentioned Coanda effect appears more strongly on the surface of the wind deflection plate 5, and as a result, the jet flow is stopped on the right side of the figure by the air chamber 7. is further deflected to the right by the wind deflection plate 5, resulting in VENT mode airflow.

As an additional feature of the device according to the present invention, a method for attaching two wind deflection plates forming components of the rectifying element is also devised. That is, as shown in FIG. 2, the lengths by which the two deflection plates 4 and 5 protrude into the air box 1 are not the same, but the protrusion length of the deflection plate 4 is increased by Δh. For this reason, in the case of the defrost mode, the deflection plate 4 contacts the jet stream rising from the slit nozzle 2 earlier.
The Coanda effect occurs preferentially on the surface side of the deflection plate 5, and the defrost mode is emphasized. on the other hand,
In the VENT mode, as already explained, the air jet from the slit nozzle 2 is biased towards the air chamber 7 side while passing between the two air chambers 6 and 7 due to the pressure gradient between the two air chambers 6 and 7. 5, the Coanda effect occurs predominantly in the deflection plate 5, and the VENT mode is emphasized.

The two wind deflection air chambers, which constitute another component of the device of the present invention, function to reverse the functions of the two wind deflection plates described above by creating a difference in the state of communication with the atmosphere between the two chambers. However, in the above embodiment, if the depth of both air chambers, that is, the length in the slit direction of the two slit-shaped nozzles, becomes 20 to 30 cm or more, the deeper the inner part of the air chamber, the more the distance from the atmosphere communication port 8. In addition to the pressure difference between the two air chambers 6 and 7, which is the driving force behind the wind deflection effect of the device, since the influence of the invading atmospheric pressure arrives with a delay, the atmospheric communication port 8
A pressure difference occurs in the depth direction inside the air chamber 6 equipped with the air chamber 6, which may make it difficult to reliably control the direction of the airflow for air conditioning. Therefore, as a countermeasure, as shown in Fig. 4, a large number of holes a are provided in such a way that each mouth edge in the slit direction of the slit-shaped nozzle 2 and each wind deflection plate are connected to the lower end. A measure was taken to install the diffuser plate 14. By making the diameter of the hole a gradually larger as the distance from the atmosphere communication port 15 increases, the pressure gradient within the air chamber can be more reliably reduced. In this case, the atmosphere communication port 15 is provided on the longitudinal side wall surface of the air chamber as shown in FIG. 4, which helps to further reduce the pressure gradient within the air chamber.

Furthermore, the ventilation control of the atmosphere communication port attached to the air chamber is not limited to the two modes of fully open or fully closed, but can also be done using a slide-operated communication port opening/closing valve so that the amount of ventilation can be changed continuously. good. Fifth
The structure and operation of the device of the present invention incorporating a sliding vent opening/closing valve have been explained with reference to FIGS. In this embodiment, an air communication port 8 is provided in each of a pair of air chambers 6 and 7 located on both sides of the air flow path blown out from the slit-shaped nozzle 2, and one of the air chambers 6 and 7 is provided with an air communication port 8. A sliding vent opening/closing valve 16 is assembled only in the communicating port, and the other communicating port lacks an opening/closing valve.

Next, moving on to the explanation of the operation of this device, Fig. 5 shows a usage state in which both communication ports 8 are open, and since the communication state of both air chambers 6 and 7 to the atmosphere is the same, the slit-shaped The airflow ejected from the nozzle 2 travels straight without being subjected to any deflection force when passing through the first airflow path for deflecting wind direction interposed between both air chambers. However, when the wind passes through the second wind deflection air passage 2 sandwiched between the two wind deflection plates 4 and 5 that are arranged opposite to each other, the Coanda effect as described above causes the wind deflection with a larger radius of curvature to flow. Since the air flow is generated more strongly on the side of the plate 4, the airflow is caused by the wind direction deflection plate 4.
, and is deflected toward the left end of the ventilation path C.

Next, as shown in FIG. 7, when the sliding vent opening/closing valve 16 attached to the air chamber 6 is fully closed,
The ability to replenish outside air into the room against the entrainment phenomenon of indoor air due to the airflow blowing through the ventilation path C is noticeably reduced compared to the air chamber 7 where the air communication port is fully open. In addition, in the direction across this ventilation passage, a pressure gradient that slopes downward to the right is created in this figure, and the passing airflow is pushed to the right end of the ventilation passage on the low pressure side. Due to the Coanda effect produced by the deflection plate 5, a blown airflow completely deflected to the right can be obtained.

Next, when the sliding vent opening/closing valve 16 attached to the air chamber 6 is set in a half-closed state as shown in FIG. Slide type vent opening/closing valve 1
An air pressure gradient is generated depending on the degree of closure of 6, and the blown air can be deflected in any direction between complete leftward deflection and complete rightward deflection.

In the device of the present invention that utilizes the principle of a fluidic element, the air chambers for wind direction deflection do not necessarily need to be installed in pairs on both sides with the ventilation flow in between, and even one chamber on one side can produce the wind direction deflection function. can. FIG. 8 shows such an example as a schematic side sectional view of the device. Reference numeral 17 designates an air box as the main part of the device, the bottom surface of which is connected to a supply duct M for air conditioning air in the vehicle interior, and a nozzle 18 for ejecting air conditioning air opening in the center thereof. The air chamber 19 for deflecting the ejected air flow is provided only on the left side,
It doesn't exist on the right side. Reference numeral 20 denotes a ventilation hole provided in the air chamber 19. In this case, the ventilation hole 20 is in communication with a bypass duct N for supplying pressurized vehicle interior air conditioning air, rather than with the atmosphere. A solenoid valve 21 and its valve body 22 are assembled. A pair of wind direction deflecting plates 24 and 25 are attached to the air outlet 23 provided on the top surface of the air chamber 19 so as to face the mouth edge of the nozzle 18. Part is air chamber 1
The lower end of the deflection plate 25 is directly joined to one edge of the nozzle 18, while the deflection plate 25 is assembled in a state that it is somewhat recessed in the nozzle 9. To explain the operation of this device, when the opening/closing solenoid valve 21 closes the ventilation hole 20 of the air chamber 19,
The degree of pressure reduction in the air chamber 19 on the left side where the airflow ejected from the nozzle 18 is caused by the air entrainment action is greater than that on the right side of the ejected airflow, so the jet airflow is deflected to the left side, and the curvature of the deflection plate 24 Since the radius is larger than that of the deflection plate 25, the Coanda effect generated in the deflection plate 24 causes the airflow to be strongly deflected further to the left, resulting in a left-side deflection airflow as shown in E. Conversely, when the ventilation hole 20 is opened, the pressurized air is blown into the air chamber 19 through the duct N, so the jet flow from the nozzle 18 is deflected to the right side in the figure due to the pressure difference. The deflected airflow is then further deflected to the right based on the Coanda effect of the wind deflection plate 25 located close to the deflected airflow, resulting in the right-side deflection airflow shown in F. FIG. 10 shows a situation in which the device A' of this embodiment is mounted on a passenger car. The supply bypass duct N is connected to the air passage on the downstream side of the blower F of the air conditioning unit D.

The assembly-related situation of the device of the present invention and the vehicle-mounted cooling device is schematically illustrated in FIG. F is a ventilation blower, L is an internal/external air switching damper, G is a cooling evaporator, U is a refrigerant compressor, V is a condenser, W is a receiver, X is a magnetic clutch for the compressor, and Y is an accessory for the engine T. Juan, Z is the water valve. Further, H is a heater core, I is an air mix damper, R is a mode switching damper group, K, J, and S are heating, cooling, and ventilation ducts, respectively, P is a communication port of the device A of the present invention to the atmosphere, and E is the existing defroster duct.

[Brief explanation of drawings]

Fig. 1 is a side view of the device of the present invention installed in a passenger car, Fig. 2 is a schematic illustration of the configuration and operation of the device of the present invention, and Figs. A perspective view including a partially broken surface explaining the second embodiment, FIGS. 5 to 7 are side sectional views schematically illustrating the structure and operation of the third embodiment, and FIG. 8 is a perspective view of the fourth embodiment. FIG. 9 is a schematic illustration of a situation in which the device of the present invention is assembled into a vehicle-mounted air conditioning system; FIG. 10 is a side sectional view of the embodiment shown in FIG. 8; FIG. FIG. In the figure, 1, 17... air box, 2, 18... slit nozzle, 3... air discharge port, 4, 5, 2
4, 25... Wind direction deflection plate, 6, 7, 19... Air chamber, 8, 15... Communication port to atmosphere, 9, 21...
Solenoid valve, 10...valve body, 14...atmospheric flow diffusion plate, 16...sliding vent opening/closing valve, A,
A'...device of the present invention, E...defroster duct,
N...Supply bypass duct, D...Vehicle air conditioning unit, A...Defrost airflow, B...
VENT mode airflow.

Claims (1)

[Scope of Claims] 1. Air having a slit-shaped nozzle on the bottom surface for blowing out air supplied from an air conditioner, and an opening on the top surface for blowing out the air injected from the nozzle into the vehicle interior. The box is attached to both mouth edges of the discharge opening parallel to the slit direction so that both convex curved surfaces face each other and at least one lower end protrudes into the air box, and the curvature thereof is at a side end of the air box separated by two wind deflection plates each having a different arcuate cross section, and the wind deflection plate installed such that at least one lower end protrudes into the air box. It consists of a formed communication port to the atmosphere and a port opening/closing mechanism attached to the communication port, and one of the two wind deflection plates is oriented toward the windshield, and the other is oriented toward the upper part of the passenger compartment. An automotive air conditioner characterized by: 2. Both of the two wind deflection plates are installed so that their lower ends protrude into the air box, and the lengths of the lower ends of the two wind deflection plates that protrude into the air box are mutually matched. An air conditioner for an automobile according to claim 1, characterized in that: 3. The automobile air conditioner according to claim 1 or 2, wherein the opening/closing mechanism is configured to be able to continuously change the degree of opening of the communication port to the atmosphere.