JPS62225413A - Device for detecting air temperature inside car chamber for automobile air conditioner - Google Patents

Abstract

PURPOSE:To prevent blower performance lowering and disturbance and to improve temperature detection efficiency inside a car chamber by arranging the constitution in such a way that space is formed along the periphery of a cylindrical throttle part of a bell-mouth and a temperature sensor case and the space are communicated through an air inflow introduction pipe. CONSTITUTION:In the condition where a changeover door 15 blocks an inside air port B to introduce outside air, the outside air passes through a bell-mouth opening 10 and then is sucked in by a blower motor 6. Then, the air flow at the bell-mouth opening 10 formed inside a cylindrical throttle part is fast and venturi effect is generated by an air flow outlet 9 and the air inside space 8 flows into the bell-mouth opening 10. Hereby the air inside the car chamber flows out to the space 8, outlet 9 and the bell-mouth opening 10 through a temperature sensor case 11, an air inflow introduction pipe 2 and an inflow 12. By this constitution into a sensor and temperature detection efficiency can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a vehicle interior air temperature detection device for an air conditioner for an automobile.

[Prior art]

Conventionally, it has been used as a means to accurately operate the temperature sensor of an automobile air conditioner as an in-vehicle sensor.

11 [Indoor air temperature sensor IyIJU! The method of using an aspirator to guide the
0-8377, Real/, ' [A proposal for sale is known in Publication No. 53-38610. In the device described in this publication, air flows from the intake box of the intake blower, and a vibrator is provided in the bell mouth portion that communicates with the sensor case to cause the blower impeller to suck the air inside the sensor case6. .

The air inside the vehicle is guided into the sensor case by the negative and positive waves generated at the bell mouth opening.

In the case of the above-mentioned aspirator, there is a drawback that operation noise is generated when the bearing of the suction fan for the aspirator wears out due to vibration or dust in the air. In addition, in the case of an intake blower, there is a drawback that the blower efficiency decreases due to an increase in suction resistance due to the arrangement of the pipe at the bell mouth opening. Since the pipe is placed in the same position, there are problems in practical use, such as not being able to secure a sufficient opening area.

In addition, the venturi-type aspirator provided downstream of the blower discharges uncontrolled air into the vehicle interior, thereby causing a disturbance in the vehicle interior temperature control. Additionally, the Venturi type aspirator published in the service manual of General Motor Company in the United States states that only cold air is discharged into the passenger compartment due to the wake of the cooling unit, which causes disturbances in the temperature control of the passenger compartment. .

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, when using the above-mentioned inhaler (aspirator), there is a problem in that the bearing of the suction fan generates abnormal noise due to wear. In addition, in the case of an intake blower, due to the arrangement of the pipe at the bell mouth opening, the blower efficiency decreases due to an increase in the suction resistance of the blower, and the opening area cannot be secured at the position of the bell mouth opening where the most negative pressure is generated. There is a problem. Also, while the blower motor is rotating and sucking air, it is effective for sucking in the air inside the vehicle.
If the vehicle speed is high when outside air is introduced, there is a problem in that the suction efficiency of the air inside the vehicle decreases and further backflow occurs. In order to obtain the air volume with a venturi type aspirator,
They are provided downstream of the blower and downstream of the cooling unit, respectively, and the discharged air is before temperature control, so there is a problem that if the air before temperature control is discharged into the main compartment, it will disturb the temperature control inside the vehicle.

The present invention has been made in view of the above circumstances, and has a simple structure that allows the indoor air to be transferred to the vicinity of the indoor air temperature sensor without degrading the original performance of the blower or causing any disturbance to the indoor temperature control. The object of the present invention is to provide a vehicle interior air temperature detection device for an air conditioner for an automobile that can efficiently guide and detect the vehicle interior temperature.

[Means for solving problems]

The above purpose is to create a space that is formed in the outer layer of the cylindrical constriction part of the bell mouth of the intake blower and communicates with the sensor case containing the cabin air temperature sensor through an air inflow conduit, and a space that is opened in the circumferential wall of the cylindrical part. This is achieved by providing at least one air outlet communicating with the inside of the constriction part and the air.

[Effect]

Due to the rotation of the impeller 6a in the scroll case 5, the air sucked from the inside air port 13 or the outside air port 14 is accelerated at the bell mouth opening 10, and a large pressure difference is generated between the air and the space 8. Therefore, the air inside the sensor case 11 via the space 8 is guided to the bell mouth opening 10 through the air outlet 9, so that the temperature of the vehicle interior air can be measured by the vehicle interior air temperature sensor 3.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The vehicle interior air temperature detection device for an automobile air conditioner according to the present invention will be explained below using an embodiment with reference to FIGS. 1 to 3. Fig. 1 is a sectional view, Fig. 2 is a perspective view of Fig. 1, and Fig. 3 is an explanatory cross-sectional view of Fig. 1. In Fig. 1, 1 is an intake blower, 2 is an air inflow conduit, and 3 is an air in the passenger compartment. Temperature sensor, 4 is intake box, 5 is scroll case,
6 is a blower motor, 6a is an impeller, 7a and 7b are bell mouths, 8 is a space, and 10 is a bell mouth opening.

11 is a sensor case, 12 is an air inlet, 13 is an inside air port, 14 is an outside air port, 15 is a switching door, 16 is a door switching actuator, and 17 is an air outlet toward the air cooling and heating device.

The intake blower 1 is composed of a scroll case 5, a blower motor 6, and an intake box 4. The intake box 4 and the scroll case 5 are partitioned by bell mouths 7a and 7b.
, 7b, a space 8 is formed between them, resulting in a double structure. The space 8 and the bell mouth opening 10 are communicated with each other through a plurality of air outlet ports 9 provided in the cylindrical constriction portion of the bell mouth 7a. Also, bell mouths 7a, 7b
An air inlet 12 is provided in the space 8 between, and an air population 12 is provided.
is connected to a sensor case 11 containing a vehicle interior air temperature sensor 3 through an air inflow conduit 2. The intake box 4 forms an air intake portion through which switching between introducing inside air and introducing outside air is performed by a switching door 15.

In the state shown in FIG. 1, the switching door 15 closes the inside air port 13 and outside air is introduced. In this case, the introduced outside air passes through the outside air port 14 of the intake box 4, passes through the bell mouth opening 10, and is sucked in through the impeller 6a driven by the blower motor 6. At this time, air flows quickly through the bell mouth opening 10 formed inside the cylindrical diaphragm.

By providing the air outlet 9, air in the space 8 flows from the air outlet 9 to the bell mouth opening 10 based on the Venturi effect. The air in the space 8 flows through the bell mouth opening 1.
0, the air flows into the interior of the vehicle through the sensor case 11, the air inlet groove 172, and the air inlet 12.
The air flows out through the space 8 and the air outlet 9 into the bell mouth opening 10 . Therefore.

The vehicle interior air can be guided to the vehicle interior air temperature sensor 3 located inside the sensor case 1. Incidentally, although the above is a case of introducing outside air, the case of introducing inside air is exactly the same. Therefore,
A large suction effect can be obtained without degrading the original properties of the blower.

Then, air can be guided to the cabin air temperature sensor and detected without causing any disturbance to the temperature control inside the cabin.

In addition, even when the vehicle speed is high, air flows through the constriction part of the bell mouth, creating a suction effect and preventing backflow.

Furthermore, since no suction device is used, there is no increase in operating noise.

In this way, the vehicle interior air temperature detection device of the automobile air conditioner of this embodiment is formed around the cylindrical throttle portion of the bell mouth and communicated with the peripheral portion of the vehicle interior air temperature sensor via the air inflow conduit. a space, and at least one opening in the peripheral wall of the cylindrical part that communicates the inside of the constriction part and the space.
Since the air outlet is configured with two air outlets, a large pressure difference is created between the bell mouth opening and the area around the cabin air temperature sensor, and the cabin air is efficiently guided to the area around the cabin air temperature sensor. Can detect indoor humidity. Further, the blower does not cause any disturbance to the temperature control inside the vehicle, has a simple structure, and does not deteriorate the original characteristics of the blower.

Note that the cross-sectional area of the air outlet 9 may be made adjustable to most effectively adjust the suction from the sensor case 11.

FIG. 4 and FIG. 5 show other embodiments, and FIG.
The air inflow conduits 2 (not shown) communicate with each other through individual air inflow conduits 2 (not shown), and in addition to being able to simultaneously detect the temperature of the vehicle interior air at a plurality of locations, it has the same effects as the above-mentioned embodiment.

In FIG. 5, the shape of the air inlet is formed into a long hole.

〔Effect of the invention〕

As described above, the vehicle interior air temperature detection device of the automotive air conditioner according to the present invention has a simple structure, and can detect the temperature of the vehicle interior air without degrading the original performance of the blower or causing any disturbance to the vehicle interior temperature control. This has the effect of efficiently guiding the air around the interior air humidity sensor and detecting the interior temperature of the vehicle.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the vehicle interior air temperature detection device for an automobile air conditioner according to the present invention, FIG. 2 is a perspective view of FIG. 1, and FIG. 3 is a cross-sectional explanatory view of FIG. 4 and 5 are cross-sectional explanatory views of other embodiments of the vehicle interior air temperature detecting device of the automobile air conditioner according to the present invention. 2... Air inflow conduit, 3... Vehicle interior air temperature sensor. 4... Intake box, 5... Scroll case, 6... Blower motor, 6a... Impeller, 7a,
7b...Bell mouth, 8...Space, 11...Sensor case, 12...Air inlet, 13...Inside air port,
14...Outside air vent.

Claims (3)

[Claims] 1. A scroll case in which an impeller driven by a motor of an automobile air conditioner is built-in, an intake box formed to be able to switch an air intake port, and arranged to guide air from the intake box to the scroll case. A space formed on the outer periphery of the cylindrical constriction part of the bell mouth and communicating with the sensor case containing the vehicle interior air temperature sensor via an air inflow conduit; A vehicle interior air temperature detection device for an air conditioner for an automobile, characterized in that at least one air outlet is provided in a circumferential wall of the shaped portion and communicates with the inside of the constriction portion and the space. 2. 2. The vehicle interior air temperature detection device for an air conditioner for an automobile according to claim 1, wherein each of said sensor cases in which a plurality of said spaces are arranged are connected to each other via said air inflow conduit. 3. 2. The vehicle interior temperature detection device for an air conditioner for an automobile according to claim 1, wherein the opening area of the air outlet is adjustable.