JPS6116156A - Air conditioner of automobile - Google Patents

Abstract

PURPOSE:To prevent moisture from being concentrated on a front glass at the heating and cooling time by providing an air supply direction deflecting mechanism at the supply port of a defroster. CONSTITUTION:A slit-like nozzle 2 from which conditioned air sent from a duct E is blasted toward the inside of an air box 1 is formed inside the box 1. An outlet port from which the blasted air is to be sent into a car room is open on the top face of the air box 1. Two arc-like wind deflecting plates 4 and 5 are disposed along both the ridge parts at the sides parallel to the slit of the air outlet port in such a manner that the plates project inside the air box 1. A communication port with respect to the atmosphere is formed inside the air chamber 6 divided as above. Said communication port is placed in such a state that the port can be opened and closed by means of a solenoid valve 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a direction-selectable medium air outlet for an air conditioner mounted on an automobile, which applies the working principle of a fluid element.

[Prior art] As a method for blowing out conditioned air into the cabin of a passenger car, the airflow from the defroster outlet has excellent delivery speed and tends to generate a circulating airflow that spreads throughout the cabin; It has been found that it is preferable to use this defroster outlet even in the case of a shade, but since the defrost airflow blows up from the bottom edge of the windshield along the glass surface, it removes moisture when the windshield is not being cooled. There is a problem that condensation occurs on the inside of the glass due to the large amount of inside air that it contains.
There is a movement to create a so-called third air outlet. The same thing can be said about dew condensation on the outer surface of the windshield during cooling. However, the provision of this third air outlet goes against the trend of reducing the number of vehicle assembly parts, reducing vehicle weight, and reducing costs.

[Object of the Invention] The automotive air conditioner of the present invention incorporates a wind direction deflection mechanism that applies the working principle of a fluid element into a conventional defroster, thereby controlling the third air conditioning air as described in the prior art section. Without the need for an air outlet, the defrost air flows from the air outlet to the interior of the vehicle at a slight angle inward from the defrost airflow, eliminating the risk of condensation on the glass surface and providing ventilation functionality comparable to that of the defrost airflow. It is an object of the present invention to provide an air outlet that can switch between and blow out an excellent third air conditioned air flow (hereinafter referred to as VENTI [mode]).

[Structure of the Invention] The automotive air conditioner of the present invention includes a slit-shaped nozzle on the bottom surface for blowing out air supplied from the air conditioner, and an opening on the top surface for discharging the injected air into the vehicle interior. Two arc-shaped wind deflection plates with different curvatures are placed over the entire length of the air box parallel to the slit direction of the opening, so that the convex curved surfaces face each other. and installed so that its lower end protrudes into the air box,
One or both of the air chambers separated by the two wind deflecting plates and formed at both ends of the air box are provided with an opening/closing mechanism and are connected to the atmosphere as i=Q+)T.

According to a preferred embodiment of the present invention, an opening/closing mechanism that allows the lower ends of the two wind deflection plates to have different lengths of protrusion into the air box, and to continuously change the degree of opening of the atmospheric communication port. 14 stages, and an air flow diffusion plate provided with a large number of ventilation holes is attached so as to connect the slit-direction mouth edge of the slit-shaped nozzle and the lower end of the wind deflection plate.
or 2 with the mounting number attached to the air discharge opening of the air box.
The lower end of one wind deflection plate of the two wind deflection plates is extended to the bottom of the air box and combined, and the air chamber is provided with the other deflection plate on the side of the air box.
A communication port with an attached opening/closing device is connected to a duct for supplying air pressurized to more than atmospheric pressure.

[Effects of the Invention] The automobile air conditioner having the configuration described in J- has the following effects.

A) Structure that applies the principle of a fluid element A simple air flow direction deflection mechanism is installed in a conventional defroster outlet]
The device of the present invention having the above-mentioned configuration has two functions: one is to blow out the defrost air stream to prevent condensation on the windshield, and the other is to blow out the defrost air stream to prevent condensation on the windshield, and as an ideal ventilation stream in the vehicle interior, as described in the prior art section. Since it can also serve as the outlet for the VENT positive mode airflow, there is no need to provide a new outlet exclusively for the VENTI mode, and the interior comfort of the vehicle can be greatly improved without increasing the product price or vehicle weight. It becomes possible. At the same time, the problem of condensation on the windshield during heating and cooling can be solved.

Even when heating is performed in the inside air circulation mode, condensation does not easily form on the glass, especially in chlorofluorocarbons, making it possible to refrain from introducing outside air. This can greatly contribute to improving the problem of insufficient heating capacity for engines and the like.

[Example] Next, an automotive air conditioner according to the present invention will be explained based on an example with reference to the drawings.

First, the manner 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.
A is installed at the intersection of the front edge of the instrument panel B and the lower end of the windshield C, which is the location occupied by the defroster outlet of conventional automobiles. It is connected to the defroster duct E of the air conditioning unit D. In the figure, F is a blower for introducing outside air, G is an evaporator for cooling, 1-1 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 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 defrosting air along the windshield as shown by the arrow (b) in the figure. A solenoid valve 9, which has the role of switching between the VEN and M directions, is installed so as to be somewhat separated from the glass.

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. An air box 1 constituting the 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 conditioning duct E into the box. A discharge port 3 for injected air into the vehicle interior is opened on the top surface of the air box 1. Two arcuate wind deflection plates 4 having different curvatures over the entire length are provided on both edges of the air discharge port 3, which is provided in a positional relationship facing the slit-shaped nozzle 2, on the side parallel to and covering the slit. 5 is
It is attached so that its lower ends 4a and 5a protrude 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, among which spaces 6 and 7 at both ends are separated by fluid dynamics. This is the part that functions as an air chamber for deflecting the wind direction of the rectifying element, and in this embodiment, a communication port 8 to the atmosphere is provided on the negative wall of one of the air chambers 6. 8 is opened and closed by an attached solenoid valve 9. 11 is an air inlet, and 1o is a valve body. Further, 12 is an integrated cover for connecting the defrosts 1 to 71 to F and the slit-shaped nozzle 2, and 13 is a spacer between the two wind direction deflection plates. Note that the atmosphere inlet 11 is connected to an air filter (not shown).

Next, referring to the above-mentioned Figures 1 to 3, we will explain the mechanism and method of operation of the device of the present invention.
When the defroster damper is opened, the solenoid valve 9 operates to close the normally open communication port 8. The air-conditioned air blown into the Surin 1-shaped nozzles 2 through the ducts 1 to 13 becomes a trickle by passing through these nozzles and passes between the two air deflection chambers 6 and 7. Air chamber 6
Since the atmospheric communication port 8 to which it belongs is closed, the communication state of the two air chambers to the atmosphere is the same, and the degree to which the air in both air chambers is caught up in the passing air flow is the same, so they have the same wind direction deflection force. Go through this part without getting hit. Then, the ejected air that reaches the lower ends of both wind deflection plates blows up while enclosing the air on the surfaces of both deflection plates 4 and 5, but the radius of curvature R1 and R2 of each of the arc-shaped drawing plates
is not the same, but is predetermined in the relationship R1>R2, so air entrainment on the circular deflection plate surface occurs more on the surface part of the deflection plate 4, and as a result, the surface part of the deflection plate 4 A negative pressure is placed on the surface of the plate 5, and due to the so-called Coanda effect, the airflow ejected from the slit nozzle 2 is forcibly deflected toward the deflection plate 4 and follows the windshield surface. The defrost mode airflow (a) that blows up is obtained.

In addition, VENTI is superior in its ability to blow air upward diagonally from some distance from the front of the windshield, and there is no need to worry about condensation on the glass surface even during air conditioning. 9 is operated on the side between the atmosphere communication port 8 and the air 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. , slit-shaped nozzle 2'h
The ejected airflows are drawn toward the air chamber 7 and approach the wind deflection plate 5, and the radius of curvature R2 of the wind deflection plate 5 is smaller than the radius of curvature R1 of the wind deflection plate 4. Nevertheless, the above-mentioned Coanda effect appears more strongly on the surface of the wind deflection plate 5, and as a result, the jet flow drawn to the right side of the figure in the air chamber 7 is further deflected to the right by the wind deflection plate 5. TI [mode airflow (b).

As an additional feature of the device according to the present invention, the method of removing the two wind deflection plates forming the constituent elements of the rectifying element is also devised. In other words, as shown in Figure 2, the lengths that the two deflection plates 4 and 5 protrude into the air box 1 are not the same, but the protrusion length of the deflection plates 4 is increased by △h. be. For this reason, in the case of defrost mode, Surin 1~
The Coanda effect occurs preferentially on the surface side of the deflection plate 4 that comes into contact with the jet stream blown up from the shaped nozzle 2 earlier than on the deflection plate 5, and the differential [I strike mode] is emphasized. On the other hand, V
In the ENTI [mode, as already explained, the airflow ejected from the nozzles 1 to 2 is biased towards the air chamber 7 side while passing between the rain air chambers 6 and 7 due to the pressure gradient between the rain air chambers 6 and 7, and is deflected. Since the air blows up close to the plate 5, the Coanda effect occurs predominantly on the deflection plate 5, and the VENTII mode is emphasized.

In addition, the two air chambers for wind direction deflection, which constitute another component of the device of the present invention, have the function of reversing the functions of the two wind direction deflection plates described above by creating a difference in the state of communication with the atmosphere between the two chambers. However, in the embodiment described in -, when the depth of the rain air chamber, that is, the length of the slit-shaped nozzle 2 in the slit direction, increases to 20 to 30 cm or more, the innermost part of the air chamber becomes open to the atmosphere. Since the influence of the atmospheric pressure that enters from the port 8 spreads and reaches the atmosphere, the atmosphere communication port 8
A pressure difference in the depth direction also occurs inside the air chamber 6 provided 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 formed so 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 remove the air flow diffusion plate 14.The diameter of the hole a was designed to gradually increase as the distance from the air communication port 15 increased, thereby reducing the pressure gradient in the air chamber. can be made smaller more reliably.In this case, the atmosphere communication port 1
5 is provided on the longitudinal side wall of the air chamber as shown in FIG. 1, and serves 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 vent fully open and fully open, but a slide-operated communication port opening/closing valve may be used to continuously change the ventilation amount. . 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. 5 to 7. In this embodiment, an atmosphere communication port 8 is provided in each of a pair of air chambers 6a3 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 6a3 and 7 is provided with an atmosphere communication port d3. A slide-type ventilation opening/closing valve 16 is arranged in one of the atmospheric communication ports, 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 speed vents 8 are open, and since the communication state of the rain air chambers 6 and 1 to the atmosphere is the same, the slit When the airflow ejected from the shaped nozzle 2 passes through the first airflow deflection channel (c) sandwiched between both air chambers, it travels straight without receiving any deflection force. When passing through the second wind deflection air passage (d) sandwiched between the two wind deflection plates 4 and 5, the Coanda effect as described above is stronger on the side of the wind deflection plate 4, which has a larger radius of curvature. As a result, the airflow is drawn toward the wind direction deflection plate 4 and 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 opened, outside air is drawn into the room by the airflow blowing through the ventilation path (c). The ability to replenish air will be noticeably reduced compared to the air chamber 7 where the atmosphere communication port is fully open.
In the ventilation passage (C), a pressure gradient is generated in the direction across the ventilation passage, which is downward to the right in this figure, and the passing airflow is pushed to the right end of the ventilation passage on the low pressure side, and then when it enters the ventilation passage (D), Due to the Coanda effect of the wind deflection plate 5 located closer to the airflow, a completely deflected airflow to the right is obtained.

Next, as shown in Fig. 6 (l/1), the cellar 1-
In this case, due to the above-mentioned reasons, a pressure gradient will occur in the direction across the ventilation path (C) depending on the degree of closure of the sliding vent opening/closing valve 16. The blown air can be deflected in the following directions.

In the IC 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 if only one chamber is provided, the air direction deflection function can be produced. can be done.

FIG. 8 shows such an example as a schematic side sectional view of the device. Reference numeral 17 denotes 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 blowing out 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 of the figure, and is not present on the right side. 20 is air chamber 1
9, which in this case is in communication with a bypass duct N for supplying pressurized vehicle interior air conditioning air, rather than with the atmosphere, and the vent hole 20 is connected to an opening/closing renoid valve 21a5. and its valve body 22 are assembled.

The air discharge port 23 provided on the top surface of the air chamber 19 has a pair of Jfi ports facing the mouth edge of the nozzle 18.
Although the deflection plate 245 is attached, the deflection plate 24
The lower end of the deflection plate 25 is assembled so as to be somewhat recessed into the air chamber 19, while the lower end of the deflection plate 25 is attached to the nozzle 18.
It is directly joined to one edge of the mouth. 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 nozzle 18
The degree of pressure reduction in the air chamber 19 on the left side of the figure by the air entrainment action is greater than that on the right side of the jetted airflow, so the jetted airflow is deflected to the left, and the curvature half of the deflection plate 24 is deflected. Since the deflection plate 24 is larger than the plate 25, it is further strongly deflected to the left by the under effect produced in the deflection plate 24, resulting in a left-sided deflection airflow of 1g as shown in (e). Conversely, if the ventilation hole 20 is opened,
As said pressurized air is blown into the air chamber 19 through the duct N, the jet stream from the nozzle 18 is deflected to the right in the figure by the pressure difference and then located in close proximity to this deflected air stream. Based on the Coanda effect of the wind direction deflection plate 25, the airflow is further deflected to the right, resulting in the right-side deflection airflow shown in FIG. 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 downstream air passage of the blower F of the air conditioner 1-D.

The relationship between the device of the present invention and the vehicle-mounted cooling device is schematically illustrated in FIG. 9. F is the ventilation blower, L is the internal/external air switching gunpa, G is the cooling evaporator, U is the refrigerant compressor, ■ is the condenser, W is the receiver, × is the magnet Clara 2 for the compressor, Y is the engine T. The attached fan, Z, is a water valve. In addition, 1 is a heater core, 2 is an air mix damper, R is a mode switching damper group, 1, 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, E is an 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 side sectional view of the fourth embodiment. A side sectional view of an embodiment, FIG. 9 is a schematic illustration of the device of the present invention installed in a vehicle-mounted air conditioning system, and FIG. 10 is a schematic diagram of the device of the embodiment shown in FIG. 8 installed in a passenger car. Figure 3 is a side view of the situation. In the figure 1.17...Air box 2.18...Slit-shaped nozzle 3...Air D1 outlet 4.5.24.25
...Wind deflector plate 6.7.19...Air chamber 8.1
5...Communication port to popular 9.21...Solenoid valve 10...Valve body 14...Atmospheric flow diffusion plate 16...
・Sliding vent opening/closing valve A, Δ'...device of the present invention E...defroster duct N...supply bypass duct D...vehicle air conditioning unit a)...airflow port for defrost 1~) ...VENTn mode airflow

Claims (1)

[Scope of Claims] 1) An air box having a slit-shaped nozzle on the bottom surface for blowing out air supplied from an air conditioner and an opening for discharging the injected air into the vehicle interior on the top surface. Two arc-shaped wind deflection plates having different curvatures over their entire length are placed on both edges parallel to the slit direction of the opening, so that their convex curved surfaces face each other and their lower ends are inside the air box. At the same time, one or both of the air chambers formed at both ends of the air box, separated by the two wind deflection plates, are provided with a communication port to the atmosphere with an opening/closing mechanism attached thereto. An air conditioning system for automobiles that is equipped with an air conditioner and can switch between defrosting and ventilation air directions. 2) The air conditioner for an automobile according to claim 1, wherein the lengths by which the lower end portions of the two wind direction deflection plates protrude into the air box are different from each other. 3) The automotive air conditioner according to claim 1 or 2, further comprising an opening/closing mechanism for the communication port that can continuously change the degree of opening of the communication port to the atmosphere. Device. 4) A patent claim characterized in that an air flow diffusion plate provided with a large number of ventilation holes is attached so that the slit-direction mouth edge of the slit-shaped nozzle and the lower end of the wind direction deflection plate are connected. An air conditioner for an automobile according to items 1 to 3 of the range. 5) Of the two wind deflection plates attached to the air discharge opening of the air box, extend the lower end of one of the wind deflection plates to the bottom surface of the air box and combine them, and Claim 1, characterized in that a communication port provided in the air chamber and attached with the mouth opening/closing mechanism is connected to a duct for supplying air pressurized to above atmospheric pressure. Automotive air conditioner described in Section 1.