JPS6018415A - Air conditioner - Google Patents

Abstract

PURPOSE:To independently control the blowout temperature of multiple blowout ports by providing the main and sub-flow passages in a duct and also providing a flow change means changing the flow speed ratio between the main and sub- flows and a control means controlling the said means electrically. CONSTITUTION:Multiple grille louvers 2 to change the wind direction to the right or left are fitted to the opening of a rectangular blowout duct 1 rotatably around a shaft 2a respectively. In addition, a main flow passage (a) enveloped by the upper and lower partition plates 1a, 1b and two vertical partition plates 1d, 1e and a sub-flow passage (b) formed with the inner wall of the blowout duct 1 and individual partition walls are formed in the blowout duct 1, and a honeycomb-like rectifying lattice 4 is arranged upstream the main and sub-flow passages (a), (b). Dampers 6, 7 regulating the flow speed ratio of the main and sub-flow of the air conditioner wind are rotatably provided upstream this rectifying lattice 4, and these dampers 6, 7 are fitted so as to be rotated in opposite directions to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner used in automobiles and the like.

When air-conditioning a single cabin in a car, it is preferable to supply hot or cold air intensively to the occupants at the start of air conditioning for rapid cooling/heating. Accordingly, it is preferable to provide detailed heating and cooling.

The outlet in conventional air conditioners has a simple structure with a louver installed at the open end of a cylindrical duct to change the direction of the airflow.The airflow that is sent out from the outlet exhibits a nearly uniform flow velocity distribution, and the degree of diffusion varies. is constant, and when air conditioning starts, there is not enough air conditioning air to the passengers. For this purpose, the amount and direction of air flow are changed, but changing the air flow Jlffi causes the humidity in the vehicle interior to deviate from the optimum humidity, and there is also a limit to how the air direction can be changed.

By the way, when a free jet with a constant air volume is sent into a stationary fluid, the smaller the flow velocity at the outer periphery of the jet in contact with the stationary fluid, the smaller the viscous force generated between it and the stationary fluid, and the diffusion attenuation of the jet is prevented. .

Therefore, the present inventors paid attention to the above-mentioned relationship, and formed a main flow passage for air-conditioned air in the central part of the inside of the blow-off duct, and formed a sub-flow passage in the outer peripheral part of the air-conditioned air flow passage. An earlier patent application filed in 1983 revealed that by slowing down the flow velocity, it is possible to prevent the air conditioned air from dispersing from the outlet, extend the temperature range of the air conditioned air, and provide the user with a sufficiently air-conditioned feeling. 230937.

However, upon further detailed research by the present inventors,
When installing an air conditioner in an automatic system, etc., due to space limitations, the duct shape of the air conditioner is very often provided with a bend. The conditioned air generated by the vehicle is turbulent at the target area, and if the conditioned air is blown out from the outlet in this turbulent state, it is likely to entrain surrounding still air and attenuate, making it difficult to provide sufficient conditioned air to the occupants. It turned out that it was not possible to obtain.

In addition, when performing independent air conditioning on the driver and passenger sides,
Conventionally, a partition plate was installed inside the duct to divide it into left and right sides, but this made the inside of the duct (frame body) complicated.
The disadvantage is that it is not possible to independently control the temperature of each outlet from a plurality of outlets, and it is not possible to perform detailed air conditioning in response to actual conditions.

Therefore, in view of the above-mentioned drawbacks of the conventional art, the present invention provides a main flow passage and a side flow passage in a duct, a flow speed ratio changing means for changing the flow speed ratio of the main flow and the side flow, and an electric flow speed ratio changing means. The purpose of the present invention is to provide an air conditioner that can independently control the air outlet temperature of a number of air outlets and change the temperature reached to the occupant by installing a control means that controls the air conditioner.

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

FIG. 1 is an overall view of an air conditioner 100 according to an embodiment of the present invention, in which an air intake port 101a is formed in a frame 101, and a blower 102. ■Baborator 103. Heater core 104. Air mix dampers 105 are installed for controlling the wind m passing through the heater cores 104, respectively.

Further, ventilation ducts 106 and 107 are connected and fixed to the frame 101 (these ventilation ducts 306 and 107 and the frame 101
1), a total of four air outlets A, B, C, and D are installed at the tip and base of the two-way duct 106 and 107. The air outlet A is an air outlet on the passenger seat side, the air outlets B and C are air outlets on the central part, and the air outlet is an air outlet on the operating LM side.

Fig. 2 is a partially enlarged sectional view of Fig. 1, Fig. 3 is a side view seen from the direction ■ of Fig. 2, and Fig. 4 is a section IV-IV of Fig. 2.
5 is a front view of the rectifying grid 4 shown in FIG. A plurality of resin grille louvers 2 for changing the angle are rotatably attached via respective shafts 2a around the axis of the shafts 2a. The shaft 2a is a rod 3
The rod 3 is housed in a recess 1C provided at the upper part of the open end of the duct 1 so as to be movable in the left-right direction in FIG. A resin knob 2b is integrally molded into one of the central parts of the plurality of grill louvers 2, and by manually moving the knob 2b from side to side, the rod can be moved in conjunction with the knob 2b. The other louvers 2 connected to 3 are also rotatable. At the open end of the blow-off duct 1, an upper partition plate 1a and a lower partition plate 1b made of resin are respectively bent 1j1 upwardly or downwardly and expanded, and are integrally molded with the blow-off duct 1. The upstream sides of the upper partition plate 1a and the lower partition plate 1b are formed parallel to each other as shown in FIG. 4, and between the upper partition plate 1a and the lower partition plate 1b, there are two Vertical partition plate 1d.

The partition plates 1e are stepped so as to be parallel to each other, and are integrally molded with the partition plates 1a and ib. That is, inside the blow-off duct 1-1, there is a mainstream passage a surrounded by the upper partition plate 1a, the upper partition plate 1b, and the two longitudinal partition plates 1'd and 1c, and the inner walls of the blow-off ducts 1-1. and each partition plate 1a'
, 1b, ld, and 1e.

1 A blowout duct l provided with the partition plates 1a, 1b, Id, and 1e so as to form a main flow passage a and a subflow passage.
-1 is formed on the upstream side, and a honeycomb-shaped rectifying grid 4 can be fitted into this step 1f. Therefore, this rectifying grid 4 is The blow-off duct 1 is fitted into the ventilation ducts 1 to 10 and 7, and is held between the stepped portion 1f of the blow-off duct 1 and the open end of the ventilation duct 107.

As shown in FIG. 5, the rectifying grid 4 has aluminum honeycomb portions 4b having uniform mesh sizes fixed to the inside of a resin frame 41a with adhesive or the like. On the upstream side of the rectifying grid 4,
One end of the damper 6.7, which adjusts the flow velocity ratio of the main stream and the side stream of the air-conditioned air, is rotatably hinged. The damper 6.7
A binion gear 8.9 (FIG. 6) is mounted on one end of each hinge shaft 6a, 7a, which are integral with each other, and each binion tooth width 8, 9 meshes with a rack gear 10 disposed between the two. Being served. The rack gear 10 has links 11 .
Since the output bolt 14 of the servo motor 13 is connected to the output bolt 14 of the servo motor 13 through the servo motor 12, the binion gears 8 and 9 meshed with the rack gear 10 rotate in opposite directions as the servo motor 13 rotates, thereby causing the damper 6. 7 are rotated 1' in a symmetrical direction with respect to each other, the upstream opening of the main flow passage a is expanded or narrowed in the direction ( ) c toward the -L flow side.

The nervo motor 13 is connected to an eccentricity sensor 169, a solar radiation sensor 1, and a passenger sensor 171 via a control circuit 15, and its rotational speed is controlled depending on whether the vehicle interior is occupied or the number of occupants is affected. In addition, damper 6゜7, gear 8.9.10,
Link 11.12, servo motor 13, control circuit 15,
Sensors 16, 17, and 18 are the same at other air outlets A and B.
, C is also installed. Note that the rectifying grid 4 is not limited to a honeycomb shape, but may have a plurality of partitions parallel to each other in the vertical and/or horizontal direction of the outlet, or may have a cylindrical shape. In this case, the rectifying grid frame may be formed into a cylindrical shape, and in that case, a plurality of concentric partitions may be arranged in stages inside the cylindrical frame. Further, as a control device for the flow rate ratio changing means,
In addition to the servo motor, an actuator die A7 flam or the like may be used.

Next, the operation of this embodiment will be described. Fig. 7 is a schematic cross-sectional view of the outlet, and Fig. 8 is a characteristic diagram showing the temperature attainment rate n, where N indicates the passage width of the main flow passage a, and [0 indicates the passage width of the auxiliary flow passage. Indication J0 and Vi indicate the flow velocity of the main stream, ■0
indicates the flow velocity of the side stream.

Figure 7 <a> shows the main flow path a in the damper 6.7.
This figure (11) is a view with the upstream side opening expanded, and this figure (C) is a view with the upstream side opening narrowed.
This is an intermediate state between (b). Figure 7(a)(b)(c)
) are hereinafter referred to as ``subotsu I'' to ``mild'' pannormal.

In the case of FIG. 7, the air-conditioned air that has passed through the rectifying grid 4 and reached the outlet at a uniform flow velocity is distributed between the partition plates 1a and lb
, id, and je into a main stream and a side stream. The main stream is narrowed into the main stream passage a by the widened inflow [1 and accelerated; on the other hand, the side stream is decelerated as the passage becomes wider after passing through the narrowed inlet.

As a result, the flow velocity ratio of the main stream and the side stream becomes Vo/Vi<1.

Note that the humidity attainment rate is expressed by the following formula.

Temperature attainment rate - (Ambient temperature - Temperature at measurement point) / (Ambient temperature - Outlet [] temperature) On the other hand, in the case of Fig. 7 (b), the main flow is decelerated and uj
The flow is accelerated to a reduction ratio Vo/Vi>1.

The four parties have determined that the ratio to/li of the passage width of the air outlet is 0.
3 to 0.7, and the reduction ratio VO/Vt @0.3 to 0.6 in the state shown in Figure 7 (a), and
In condition b), with the reduction ratio vo/v+ set to 1°2 to 1.6, the distribution of the temperature attainment rate in the vertical plane at a point 70 cm away from the air outlet was measured for each, and compared with the conventional air outlet. did. This is shown in Figures 8(a) and (b), respectively.
As shown in -. In Figure 113, the line x indicates the case of the outlet of this embodiment, and the line y indicates the case of the conventional outlet. Figure 7 (
According to A>, when conditioned air is blown into an almost still atmosphere, the outlet of this embodiment, which divides the conditioned air into a main stream flowing through the center and a side stream flowing outside the main stream, will By reducing the flow velocity of the air and suppressing the viscous force with the atmosphere, diffusion attenuation of the air-conditioned air is prevented, and as shown in Fig. 8 (a)
), the temperature is maintained and the distance extended.

On the other hand, if the deceleration of the side flow is greatly increased to actively generate viscous force with the atmosphere as shown in Figure 7 (11), the conditioned air will rapidly diffuse and become uniform as shown in Figure 8. spread.

In FIG. 7(C), the flow velocity ratio vo/vt is set to 1.0, which makes it possible to obtain a free jet flow similar to that of a normal blow-off port that is not divided into a main flow and a side flow. The temperature distribution is between FIGS. 7(a) and 7(b), and the temperature attainment rate n is as shown in FIG. 8(C).

Next, a method of controlling each blowout II A to D will be described based on FIG. After turning on the air conditioner (A/C) switch in step a, select manual or auto in step l). In the case of manual mode, the vehicle is operated in the spot, normal, or mild mode selected in step C.

On the other hand, in the case of auto, control is performed by dividing the air outlet into the passenger seat side air outlet A, the central Suita outlet B, C, and the driver's seat side air outlet. That is, the central air outlet B as in step d.

C first becomes a spot state, and is sequentially controlled to a normal state and a mild state. Also, in step e, the driver's seat side air outlet is spot and normal.

It is controlled in order of mild, but in this case the solar radiation sensor 17
Control is performed according to the amount of solar radiation to the driver's seat.

Finally, in step [, depending on the presence or absence of the passenger by the action of the riding Lorenna 18, if there is no passenger, as in step g,
When it is 1'', control is performed according to the amount of solar radiation as in step h.

In FIG. 9, T1 is the vehicle interior temperature, TS is the set humidity, and Tn is the R suitable temperature.

In addition, if the control of the air outlet in the above embodiment is performed in combination with an automatic air conditioner, each sensor can be shared.
Further effects can be expected. □ Control that causes a temperature difference between the left and right sides of the vehicle interior is also possible, and mode switching may be performed by detecting the interior wall temperature. In addition, various other modifications are possible, such as linking with the vehicle door to temporarily perform spot cooling and heating when getting into the vehicle, or detecting the outside temperature and controlling it in accordance with the outside temperature.

As described above, the present invention provides a duct, an air outlet provided at a plurality of outlet portions of the duct, a partition plate installed along the inner wall of the air outlet duct which is a frame of the air outlet, and a partition plate provided along the inner wall of the air outlet duct, which is a frame of the air outlet. a main flow passage formed in the center of the blow-off duct, a sub-flow passage formed on the outer periphery of the passage, a flow speed ratio changing means for changing the flow speed ratio of the main flow and the sub-flow, and the flow speed ratio changing means being electrically controlled. Since the structure is composed of a control means, the internal structure of the duct is simple, which contributes to easier assembly and lower costs. Furthermore, each of the plurality of air outlets can be controlled independently, making it possible to achieve fine-grained air conditioning that immediately responds to the reality inside the vehicle. Also the blowing temperature.

It becomes possible to change only the temperature distribution without changing the wind mass.

[Brief explanation of the drawing]

Fig. 1 shows one embodiment of the present invention - a resting body, Fig. 2 is a partially enlarged sectional view of Fig. 1, Fig. 3 is a side view seen from the direction ■ in Fig. 2, Fig. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, FIG. 5 is a front view of the straightening grid 4 in FIG. FIG. 8 is a schematic cross-sectional view of the outlet portion, and FIG. 8 is a characteristic diagram without showing the temperature attainment rate 11. FIG. 9 is a flowchart without showing the operational status. 101... Frame 106, i07... Ventilation ducts A, B, C, D... Air outlet 1... Air outlet duct 2... Grill louver 4... Honeycomb-shaped rectifying grid 13... V-BOMOTOR 16.17.18...Sensor patent applicant Nippon Telecommunications Co., Ltd. Agent Patent attorney Hirodo Okawa Patent attorney Shudo Fujitani Patent attorney Akio Maruyama Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 16 1718 Figure 7 Figure 8 (C)

Claims (7)

[Claims] (1) A duct, - an air outlet provided at a plurality of outlet portions of the duct, a partition plate provided along the inner wall of the air outlet duct which is a frame of the air outlet, and a central portion of the air outlet duct by the partition plate. A main flow passage formed in the main flow passage, a sub flow passage formed on the outer periphery of the passage, a flow speed ratio changing means for changing the flow speed ratio of the main flow and the side flow, and the flow speed ratio changing means are electrically controlled! An air conditioner comprising: l- control means. (2) The air conditioner according to claim 1, wherein the main flow passage and the side flow passage are provided with rectifying means. (3) The air conditioner according to claim 2, wherein the rectifying means is a honeycomb-shaped rectifying grid. (4) The air conditioner according to claim 1, wherein the flow rate ratio changing means is a pair of dampers that rotate in opposite directions. (5) The control means includes a gear drawing that operates the flow speed ratio changing means, a servo motor that operates the gear (multi-groove gear), and a control circuit and sensor that controls the rotation of the servo motor. Claim 1 characterized in that
Air conditioner as described in section. (6) The sensor is a temperature sensor, [1. The air conditioner according to claim 5, which is an occupant sensor. (7) The air conditioner according to claim 1, wherein the flow rate ratio changing means is located upstream of the rectifying means.