KR20170002995A - Apparatus for Detecting Temperature and Humidity for Vehicle - Google Patents

Abstract

The present invention relates to a fanless type vehicle temperature and humidity detection device which does not use an aspiration fan to detect an internal temperature of a vehicle to eliminate a generation of noise. The fanless type vehicle temperature and humidity detection device comprises: a case which has a surface attached to a glass window of the vehicle, forms a single storage space therein, and has a first through-hole exposed to the vehicle compartment space from the storage space; and a sensor assembly stored in the case. The sensor assembly comprises: a printed circuit board supported in the storage space; and an internal temperature sensor which has an end mounted on a surface of the printed circuit board having a head partially exposed to a vehicle compartment space through the first through-hole to sense the internal temperature.

Description

Technical Field [0001] The present invention relates to a temperature /

The present invention relates to a temperature and humidity detecting apparatus for a vehicle, which can detect an indoor temperature of a vehicle without generating noises without using an exhausting fan.

Generally, the automobile has an air conditioner for indoor heating or cooling.

In order to improve the convenience of the driver, the automobile air conditioner is being converted into an automation device. For this purpose, an in-car sensor for automatically measuring the temperature of the automobile room is essentially installed in the air conditioner.

An in-car sensor is installed on the back surface of an automobile grill or an instrument panel. The in-car sensor sucks indoor air through an aspirator system or a ventilation system, It senses the temperature of automobile room air with an inca sensor installed in the air flow.

Here, the earth sensor type incase sensor uses an aspiration motor that rotationally drives an impeller (fan) to inhale the automobile room air to measure the room temperature of the automobile.

Korean Patent No. 10-0887535 and No. 10-1491051 disclose an inca sensor proposed by the present applicant.

In Korean Patent No. 10-0592712 (Patent Document 1), a technique of measuring indoor humidity as well as indoor temperature using an inciner sensor has been used. However, when the vehicle is in an idle stop & go (ISG) state, the engine is stopped and most of the noise generating factors are in the operation stop state. However, the electric sensor operated by electricity is noisy due to the driving of the aspiration motor there is a problem.

Accordingly, there is a demand for a technique of detecting a room temperature by a fanless type without using an impeller (fan).

On the other hand, generally, when the humidity of the vehicle interior is high and the outdoor temperature is low, a fog phenomenon occurs in which dew is formed on the windshield. That is, when the surface temperature of the windshield is lower than the dew point temperature determined according to the humidity around the windshield, fog occurs to conceal the driver's view. Accordingly, most vehicles are provided with a defogging system for removing fog using air discharged through a defrost duct of the air conditioner when a fog occurs.

The defogging system detects the occurrence of fog on the windshield early and suppresses the occurrence of fog. In addition, the defogging system removes the fog early when the fog occurs, thereby improving the safety of the driver by ensuring a smooth watch, .

Therefore, most of the defogging systems detect the fog using a fog sensor attached to the windshield, and when the fog is expected, the defogging system is operated to suppress the occurrence of fog and to remove the fog that has already been generated .

Korean Patent Laid-Open Publication No. 10-2005-0114014 (Patent Document 2) discloses a vehicle window fogging detection apparatus comprising: a glass surface surrounding humidity sensor for detecting a humidity around a vehicle glass surface; A glass surface temperature detection sensor for detecting the temperature of the vehicle glass surface; A glass surface temperature detection sensor for detecting a temperature around the vehicle glass surface; A control unit for estimating a vehicle interior temperature from the temperature around the glass surface of the vehicle and the temperature of the vehicle surface, calculating the estimated vehicle interior temperature and humidity around the vehicle glass surface, and comparing the obtained dew point temperature with the glass surface temperature to selectively generate a fogging detection signal; Wherein the vehicle window fogging detection device comprises:

In Patent Document 2, the glass surface temperature detection sensor is disposed inside the sensor box so that it can be used to detect the temperature around the vehicle glass surface to obtain the dew point temperature. The vehicle interior temperature is estimated from the temperature around the vehicle glass surface and the glass surface temperature have. Therefore, Patent Document 2 does not have a function of detecting the room temperature around the driver by using an incase sensor for controlling the room temperature in the HVAC (vehicle air conditioner).

In Patent Document 2, the glass surface temperature is detected by fixing the thermally conductive silicone to the glass surface at the time of glass surface temperature detection and bringing the glass surface temperature sensor into contact with the thermally conductive silicone. However, There is a problem that the glass surface temperature detection sensor is influenced by the lowered room temperature and the accurate glass surface temperature can not be detected.

Furthermore, as described in Patent Document 2 and Korean Patent Registration No. 10-0710868 (Patent Document 3), the conventional fog sensor is provided with a case mounting mount, and the upper / lower case is mounted on a window glass. There is a problem that the size is increased and the cost is increased.

: Korea Patent No. 10-0592712 : Korean Patent Publication No. 10-2005-0114014 : Korean Patent No. 10-0710868

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a fanless fan which can detect an indoor temperature of a vehicle without generating noise, And to provide a temperature and humidity detecting apparatus for a vehicle.

It is another object of the present invention to provide a fanless type fan motor which can be miniaturized by integrally mounting a fanless type indoor temperature sensor for detecting a room temperature of a vehicle to a fog sensor for detecting a fog for controlling defogging, And to provide a temperature and humidity detecting device for a vehicle.

Another object of the present invention is to provide a fanless type air conditioner capable of precisely detecting the actual temperature of the glass surface regardless of the lowered room temperature even when the room temperature is lowered due to the operation of the air conditioner for accurate de- And to provide a temperature and humidity detecting device for a vehicle.

It is another object of the present invention to provide a temperature and humidity detecting apparatus for a fanless type vehicle which can detect a precise temperature while attaching a sensor box to a glass surface without using a mount for miniaturization.

According to one aspect of the present invention, there is provided a vehicle comprising: a case having a first through hole exposed from a receiving space to an interior space of a vehicle, one surface of which is attached to a windshield of a vehicle and forms one receiving space therein; And a sensor assembly accommodated in the case, wherein the sensor assembly includes: a printed circuit board supported inside the accommodation space; And a room temperature sensor which is mounted at one end of the printed circuit board and part of the head is exposed to the interior space of the vehicle through the first through hole to sense the room temperature, Lt; / RTI >

The case has a second through hole exposed from the accommodation space to an interior space of the vehicle. The sensor assembly has one end mounted on one side of the printed circuit board and the tip end closely contacting the windshield, Glass surface temperature sensor; A temperature and humidity sensor mounted on the other side of the printed circuit board facing the second through hole to sense temperature and humidity around the glass surface; A compensation temperature sensor for sensing a temperature around the temperature / humidity sensor; And a control unit for accelerating and temperature-compensating temperature and humidity data sensed by the temperature / humidity sensor to generate compensated humidity data.

Wherein the temperature and humidity detecting device for a vehicle is attached to at least one of the one side surface and the other side surface of the printed circuit board and the inner surface side of the windshield of the case, As shown in FIG.

The heat insulating sheet may be composed of a heat dissipation sheet alone, a composite sheet in which a heat radiation sheet and a heat insulation sheet are laminated, and a composite sheet in which a heat insulation sheet is sandwiched between a pair of heat radiation sheets.

The glass surface temperature sensor may be a film type, the temperature sensor for compensation may be a chip type, and the room temperature sensor may be a lead type.

Wherein the case is a rectangular cover whose outer surface is attached to the windshield of the vehicle; And a cover having a first and a second through-hole that are coupled to the upper portion to form one receiving space therein and which are exposed to the interior space of the vehicle from the receiving space, And a body case having one opened receiving groove.

As described above, in the present invention, it is possible to detect the indoor temperature of the vehicle without generating noises without using the ventilation fan like the conventional inca sensor.

In addition, in the present invention, a fanless type room temperature sensor for detecting a room temperature of a vehicle can be integrally mounted on a fog sensor for detecting a fog for controlling the defogging, thereby enabling miniaturization. Since the room temperature sensor of the present invention has no fan, it does not generate room noise even though the mounting position is attached near the room mirror.

Further, in the present invention, even if the room temperature is lowered by the operation of the air conditioner for accurate dephogging, the actual temperature of the glass surface temperature can be accurately detected regardless of the lowered room temperature.

The present invention provides a temperature and humidity detecting device for a vehicle, which can detect a precise temperature while attaching a sensor box to a glass surface without using a mount for miniaturization.

1 to 6 are respectively a front perspective view, a side view, a plan view, a rear view, an exploded view, and an XY line sectional view of the temperature and humidity detecting device for a fanless type vehicle according to a preferred embodiment of the present invention.
7 is a block diagram showing a control circuit of a temperature and humidity detection device for a fanless type vehicle according to a preferred embodiment of the present invention.
8 is a flow chart showing control of the temperature and humidity detection device for a fanless type vehicle according to a preferred embodiment of the present invention.
9 is a graph showing a relative humidity obtained by an acceleration program in a fanless type temperature / humidity detecting apparatus for a vehicle according to a preferred embodiment of the present invention.
10 is a graph showing a comparison between the measured humidity obtained by the temperature compensation program and the uncompensated humidity in the fanless type temperature and humidity detecting apparatus for a vehicle according to the preferred embodiment of the present invention.
FIG. 11 is a graph showing temperature measured when a heat-radiating sheet is applied and when it is not applied in a temperature-humidity detecting apparatus for a fanless type vehicle according to a preferred embodiment of the present invention.
12 is a graph showing a comparison of the humidity measured when using the CPU internal clock and the external clock in the fanless type temperature / humidity detecting apparatus for a vehicle according to the preferred embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience.

1 to 6, a temperature and humidity detecting apparatus for a fanless type vehicle according to a preferred embodiment of the present invention includes a body case 10 for receiving a sensor assembly 30 therein, The case is constituted by the cover 20 which is coupled to the upper portion of the housing 10.

The cover 20 has a square shape. The body case 10 also has a substantially square-shaped accommodation space therein. The protrusion 12 is formed on one side of the cover 20. The sponge 20 of the synthetic resin And a distal end portion of the glass surface temperature sensor 32 for measuring the temperature of the glass surface, which will be described later, is positioned outside the elastic member 24.

The elastic member 24 has a rectangular ring structure having a through hole at the center thereof and has elasticity so that the front end of the glass surface temperature sensor 32 positioned thereon closely contacts the windshield 1 of the vehicle.

An opening 11 through which the connector 23 is exposed is formed on the side surface of the body case 10 where the protrusion 12 is formed and a portion of the bottom surface of the body case 10 opposite to the humidity sensor 34 At least one through three through windows 14 are formed to sense the indoor humidity of the vehicle. Further, the penetrating window 14 is provided with a filter made of a porous membrane so as to prevent foreign matter from entering.

The head of the room temperature sensor 31 can be protruded to the outside of the body case 10 so that the indoor temperature of the vehicle, preferably the indoor temperature around the driver, can be detected on the bottom surface of the body case 10 The through hole 16 is formed.

A plurality of coupling grooves 15 are formed on the side surface of the body case 10 so as to maintain a fixed state between the body case 10 and the cover 20 by snap engagement. And a plurality of hooks 21 to be snap engaged are formed extending from the side surface.

A reinforcing rib 22 for fixing the connector 23 when the body 20 is coupled with the cover 20 is formed on one side of the cover 20.

The sensor assembly 30 accommodated in the body case 10 and the cover 20 includes a glass surface temperature sensor 32 and a signal processing control unit 51 on one side of a printed circuit board Humidity sensor 34, a room temperature sensor 31 and a temperature sensor 33 for compensation are mounted on the other side of the printed circuit board (PCB) The printed circuit board (PCB) 35 is fixed between the hook 21 and the step formed in the receiving groove of the body case 10.

The temperature and humidity detecting apparatus for a vehicle according to the present invention is attached to a windshield located at the front of a room mirror (not shown) of a vehicle, and a wire harness (not shown) drawn out from the connector 23 is attached to the inside (Climate Control Module) 60 through a controller area network (CAN), a local interconnect network (LIN), or a UART communication network.

That is, the temperature / humidity detecting apparatus for a vehicle according to the present invention is fixed to the windshield 1 by using a thin film adhering means such as a double-sided tape 40, for example, on the cover 20 of the case. Therefore, in the present invention, even when the glass window is to be replaced due to breakage or the like, it is possible to easily detach the temperature / humidity detecting device for the vehicle from the window glass and attach it to the new window glass.

When the cover 20 is fixed to the windshield 1, the glass surface temperature sensor 32 uses a negative temperature coefficient thermistor and the lead and the head are thin film insulation And an insulating film type structure in which the outside is laminated by a film is used. One end of the lead is fixed to one side of the printed circuit board (PCB) 35 and the tip portion where the head is located is bent at a right angle at the middle portion to extend to the protrusion 12 of the body case 10, 24, and the head of the glass surface temperature sensor 32 is brought into close contact with the glass window 1 by the elastic force of the elastic member 24.

The temperature and humidity sensor 34 mounted on the other side of the printed circuit board (PCB) 35 in a chip form has both a humidity detecting function and a temperature detecting function around the glass surface and has an error rate of ± 5% RH. (14) formed on the bottom surface of the housing (10).

The compensating temperature sensor 33 uses a negative temperature coefficient thermistor and detects the ambient temperature of the temperature and humidity sensor 34, that is, the temperature around the glass surface, so as to be used when calculating the dew point temperature. Is mounted on the other side of the case 35 in the form of a chip to detect the temperature inside the case.

The room temperature sensor 31 uses a negative temperature coefficient thermistor and is mounted on the other side of the printed circuit board (PCB) 35. A part of the head of the front end portion is mounted on the bottom surface of the body case 10 Type structure is used so as to be installed in a structure that passes through the formed through-hole 16 and is exposed to the inside of the vehicle.

Since the front end of the room temperature sensor 31 passes through the through hole 16 of the body case 10 and is exposed to the inside of the vehicle, the indoor temperature around the driver can be accurately detected.

The room temperature sensor 31, the glass surface temperature sensor 32 and the compensation temperature sensor 33 are connected to an air conditioning control unit (CCM) 60 at a resistance value of 10 kΩ @ 25, Up resistor is connected to the air conditioning control unit (CCM) 60 to read the temperature data with the voltage value.

On the other hand, in the conventional fog sensor, when the air conditioner (air conditioner) of the vehicle is operated, the room temperature and the compensation temperature of the vehicle are lowered as the air conditioner operation time elapses. However, even in this case, the glass surface temperature sensor is required to detect the actual temperature (outside temperature) of the glass surface, but if the actual room temperature falls similarly to the room temperature and the compensation temperature, There is a problem of detecting the lowered temperature due to the influence of the temperature.

In order to solve such a problem, the present invention provides a composite sheet in which a heat-radiating sheet alone, a heat-radiating sheet and a thin-film heat-insulating sheet laminated in a horizontal direction with excellent thermal diffusing function, and a composite sheet sandwiched between a pair of heat- Can be attached to at least one of the one side surface, the other side surface, or the inner surface of the cover (20) of the printed circuit board (PCB) (35)

The heat-radiating sheet may be a graphite sheet having excellent thermal diffusion function in the horizontal direction, aluminum (Al), copper (Cu) or silver (Ag) foil as a thin metal plate having excellent thermal conductivity. As the thin insulating sheet, A porous nanofiber web formed by integrating nanofibers obtained by electrospinning a polymer, a metal thin film having a high specific resistance, an amorphous thin plate magnetic sheet, a thin sheet of FeCrAl, or the like.

When the heat shield sheet 36 is attached to one side and / or the other side of the printed circuit board (PCB) 35, the room temperature sensor 31, the glass surface temperature sensor 32 and the compensating temperature sensor 33 And the temperature and humidity sensor 34 are avoided.

If the indoor air of the vehicle is blocked by using the heat insulation sheet 36 in the vicinity of the glass surface temperature sensor 32, even if the room temperature is lowered or raised by operating the air conditioner, The sensor 32 can accurately sense the temperature of the windshield 1. As a result, the defogging apparatus can measure the dew point temperature more precisely and prevent the generation of fog on the window.

In the present invention, when the glass surface temperature detected from the glass surface temperature sensor 32, the compensation temperature detected from the compensation temperature sensor 33, and the humidity data detected from the temperature / humidity sensor 34 are transmitted to the air conditioning control device 60 , The dew point temperature is calculated based on the information received from the air conditioning control device, and the dew point temperature is compared with the glass surface temperature to determine whether or not fogging is to be performed.

Further, in the related art, measurement data is transmitted to the air conditioning control apparatus by measuring the room temperature by an in-car sensor using a fan and an aspiration motor. In the present invention, 16), it is possible to accurately detect the ambient temperature around the driver by a simple and fan-free method, thereby reducing the cost and preventing the noise from being generated in the idle stop & go state .

Hereinafter, the control circuit of the fanless type temperature / humidity sensing device for a vehicle according to the preferred embodiment of the present invention will be described with reference to FIG.

The control circuit of the temperature and humidity detection device for a fanless type vehicle according to the preferred embodiment of the present invention includes a control unit 51 for performing overall signal processing and control, a temperature and humidity sensor 34 for detecting temperature and humidity, An oscillator 52 for providing a reference clock to the control unit 51, an indoor temperature sensor 31, and a control unit 51. The frequency converter 54 converts the humidity data detected by the temperature sensor 51 into a frequency value and transmits the frequency data to the air conditioning control unit 60, A glass surface temperature sensor 32, and a temperature sensor 33 for compensation, and is mounted on a printed circuit board (PCB) 35.

Further, the control circuit is provided with a reverse voltage prevention diode 55 and a constant voltage circuit 56 as a power supply circuit. When the voltage of 5 V applied from the air conditioning control unit (CCM) 60 is applied to the constant voltage circuit 56 via the reverse voltage prevention diode 55, the constant voltage circuit 56 controls the control unit 51 and the temperature / humidity sensor 34 ) To generate and supply a constant voltage of 3.3V.

The sensing of the room temperature, the glass surface temperature, and the compensation temperature by the room temperature sensor 31, the glass surface temperature sensor 32, and the compensation temperature sensor 33 is performed by the air conditioning control unit (CCM) Climate Control Module) 60, and the temperature data is read as a voltage value by connecting a pull-up resistor to the air conditioning control unit (CCM)

When the clock signal SCL is applied to the temperature / humidity sensor 34, the control unit 51 converts the humidity data SDA sensed by the temperature / humidity sensor 34 into a digital signal and receives the digital data. The control unit 51 performs acceleration processing and temperature compensation processing on the received humidity and temperature data.

When the humidity value detected by the control unit 51 changes from 0 to 100%, the frequency conversion unit 54 converts the humidity value into a frequency value in the range of 40 Hz to 90 Hz, and transmits the frequency value to the air conditioning control unit 60.

The control operation of the temperature and humidity detection device for a fanless type vehicle according to the present invention will be described below with reference to FIG.

When the humidity data detected by the temperature / humidity sensor 34 is received (S11), the control unit 51 performs a signal processing in accordance with the acceleration program S12 and performs control to reduce the response time to the detected humidity.

In the present invention, when the first humidity data, the second humidity data, the third humidity data, and the fourth humidity data are sequentially received according to the acceleration program (S12), data processing is performed as described below to obtain an average value of the received humidity data .

[Equation 1]

Average value = first humidity data + 4 占 (first humidity data - fourth humidity data) + (second humidity data - third humidity data)

That is, when the average of four humidity data periodically detected by the temperature / humidity sensor 34 is processed according to Equation (1) and signal processing is performed, a data value with a quick response time is obtained. As a result, It becomes possible to rapidly perform the depo control in response to the change of the humidity data.

9 shows the humidity data graph (1) applied with the acceleration program and the humidity data graph (3) when the acceleration program is not applied, and the humidity data graph (1) using the acceleration program is shown in It can be seen that the response is quick.

That is, in the humidity data graph (◆) in the case where the acceleration program is not applied, the humidity value changes from 80% to about 53% over 40 seconds, but the humidity data graph (■) The humidity value falls from 80% to about 53% within a second.

Then, the control unit 51 proceeds to the temperature / compensation program S13. When the temperature data is received together with the humidity data by the temperature / humidity sensor 34 (S11), the control unit 51 determines whether the temperature is > 30 DEG C or the temperature < -10 DEG C.

If the temperature is > 30 DEG C or the temperature < -10 DEG C, the temperature compensation according to the following formula (2) is performed.

&Quot; (2) "

Temperature Compensation = Humidity - (Temperature × C)

C is a constant determined according to the temperature deviation value described in the data sheet issued by the manufacturer of the temperature / humidity sensor 34, and C = 0.05 when the temperature deviation value of the data sheet is 0.05 占 폚.

The setting of 30 ° C or higher and -10 ° C or lower, which is a condition for applying the above temperature / compensation program, is obtained by experiments.

When the temperature compensation is performed as described above, the accuracy% RH error rate of the temperature / humidity sensor can be reduced. The humidity measurements for the temperature / compensation program described above were based on humidity using an EE33 humidity calibration device.

FIG. 10 shows graphs of the reference data obtained by using the EE33 humidity calibration apparatus () at 70 ° C., the humidity data graph (FIG. 1) of the temperature-compensated sample 1, And the humidity data graph (?).

The on / humidity data subjected to the acceleration processing and the temperature compensation signal processing as described above is then output to the frequency conversion unit 54, converted into frequency values in the range of 40 Hz to 90 Hz, and transmitted to the air conditioner control unit 60 (S14 ).

(Example 1)

The air conditioner (air conditioner) is operated and then the temperature and humidity sensor 34 (or the air conditioner) is turned on the other side (that is, the driver side direction) of the printed circuit board (PCB) 35 by using the graphite sheet as the heat insulating sheet 36 as time elapses The room temperature sensor 31 and the compensating temperature sensor 33 are attached in a pattern that does not obscure the heat insulating sheet 36 and the case where the heat insulating sheet 36 is not applied to the printed circuit board The glass surface temperature sensor 31, the glass surface temperature sensor 32 and the compensation temperature sensor 33 are measured, and the measured temperatures are shown in Fig.

The measured temperature ()) of the room temperature sensor 31, the measured temperature ()) of the glass surface temperature sensor 32 when the heat insulating sheet 36 is attached to the other side of the printed circuit board (PCB) 35 And the measured temperature (占) of the compensating temperature sensor 33 are shown as a graph and the room temperature when the heat insulating sheet 36 is not applied to the printed circuit board (PCB) 35 The measured temperature x of the sensor 31, the measured temperature of the glass surface temperature sensor 32 and the measured temperature of the compensating temperature sensor 33 are shown in a graph.

11, the measured temperature (×) of the room temperature sensor 31 when the heat shielding sheet 36 is not applied to the printed circuit board (PCB) 35, the measured temperature of the glass surface temperature sensor 32 And the measured temperature (●) of the compensating temperature sensor 33 are shown in Table 1 below and the room temperature sensor () when the heat blocking sheet 36 is applied to the printed circuit board (PCB) 35 The measurement temperature of the glass surface temperature sensor 32 and the measurement temperature of the compensation temperature sensor 33 were as shown in Table 2 below.

Time (min) Temperature (℃) Glass surface temperature Room temperature Compensation temperature 0 49 46 48 30 39 36.5 36

Time (min)
Temperature (℃) Glass surface temperature Room temperature Compensation temperature 0 47 43 40 30 49 38 39.5

(X) of the room temperature sensor 31 when the heat shielding sheet 36 is not applied to the printed circuit board (PCB) 35, the measurement of the glass surface temperature sensor 32 The temperature (*) and the measured temperature (●) of the compensating temperature sensor (33) were affected by the lowering of the room air over time after the air conditioner was turned on, indicating that all of the measured temperatures dropped. The results show that the glass surface temperature sensor 32 is not affected by operating the air conditioner and can not accurately sense the temperature of the glass surface.

On the other hand, when the heat shielding sheet 36 is applied to the printed circuit board (PCB) 35, the measured temperature (?) Of the glass surface temperature sensor 32 is lower than the temperature (47 占 폚) (38 deg. C) after the operation for 30 minutes is lower than the temperature (43 deg. C) before the air conditioner is operated, and the temperature for compensation (49 deg. C) The measured temperature (?) Of the sensor 33 was also somewhat lowered.

The glass surface temperature sensor 32 accurately senses the temperature of the glass surface without being influenced by operating the air conditioner and the room temperature sensor 31 detects that the head is partially exposed from the case to the room of the vehicle And the temperature sensor 33 for compensating was disposed inside the case to sense a somewhat lower temperature.

(Example 2)

When the error rate of the temperature and humidity sensor obtained from the market is used as the internal clock by the microprocessor (CPU) used as the control unit 51 for the signal processing apparatus, there is an error of about 5% The maximum error was 4.3%.

In the present invention, a microprocessor (CPU) used as the control unit 51 applies a clock signal (SCL) to the temperature / humidity sensor 34 by using an external clock received from an externally connected oscillator 52 as shown in FIG. And when the humidity data is sensed and received from the temperature / humidity sensor 34, it is confirmed that an error rate of 1.6% RH occurs.

FIG. 12 shows graphs of the reference data (?) Obtained by using the EE33 humidity calibration apparatus when the temperature is 70 占 폚, the humidity data graph (?) Obtained when the external clock is operated, the humidity data graph .

Referring to FIG. 12, it can be seen that the humidity data obtained when operating the external clock shows a change closer to the graph of the reference data obtained using the EE33 humidity calibration device than the humidity data obtained when operating the internal clock.

Therefore, it is preferable to use an external clock for the CPU in order to increase the humidity accuracy.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

The present invention is applied to a temperature and humidity detecting device for a fanless type vehicle that can detect an indoor temperature of a vehicle without generating noises without using an exhausting fan.

1: windshield 10: body case
11: aperture 12:
13: receiving groove 14: penetrating window
15: engaging groove 16: through hole
20: cover 21: hook
22: reinforcing rib 23: connector
24: elastic member 30: sensor assembly
31: indoor temperature sensor 32: glass surface temperature sensor
33: Temperature sensor for compensation 34: Temperature and humidity sensor
35: PCB 36: heat shield sheet
40: double-sided tape 51: control unit
52: Oscillator 54: Frequency converter
55: reverse voltage prevention diode 56: constant voltage circuit
60: Climate control device (CCM)

Claims (14)

A case having a first through hole which is attached to a window of a vehicle and forms one receiving space therein and which is exposed to the vehicle interior space from the receiving space; And
And a sensor assembly received within the case,
The sensor assembly includes:
A printed circuit board supported in the accommodating space; And
And a room temperature sensor for sensing a room temperature by mounting one end of the printed circuit board on one side of the printed circuit board and exposing a part of the head to an interior space of the vehicle through the first through hole. The method according to claim 1,
The case having a second through hole exposed from the accommodation space to an interior space of the vehicle,
The sensor assembly includes:
A glass surface temperature sensor having one end mounted on one side of the printed circuit board and the other end being in close contact with the glass window to sense the temperature of the glass surface;
A temperature and humidity sensor mounted on the other side of the printed circuit board facing the second through hole to sense temperature and humidity around the glass surface;
A compensation temperature sensor for sensing a temperature around the temperature / humidity sensor; And
And a control unit for generating the compensated humidity data by performing acceleration processing and temperature compensation processing on the temperature and humidity data sensed by the temperature / humidity sensor. 3. The method of claim 2,
And a heat insulating sheet attached to at least one of the one side surface and the other side surface of the printed circuit board and the inner side of the windshield side of the case to shield heat applied to the glass surface temperature sensor by the room air of the vehicle And a temperature sensor for detecting temperature of the vehicle. The method of claim 3,
Wherein the heat insulating sheet comprises one of a heat dissipating sheet alone, a composite sheet in which a heat dissipating sheet and a heat insulating sheet are laminated, and a composite sheet in which a heat insulating sheet is sandwiched between a pair of heat dissipating sheets. 3. The method of claim 2,
Wherein the glass surface temperature sensor is a film type and the temperature sensor for compensation is a chip type. The method according to claim 1,
Wherein the room temperature sensor is a lead type. 3. The method of claim 2,
The case has one open receiving groove toward the window on a protruding portion on one side,
Wherein the glass surface temperature sensor is resiliently supported on a front surface of the receiving groove whose tip end portion is opened, and is brought into close contact with the windshield. 8. The method of claim 7,
Further comprising an elastic member inserted and supported in the receiving groove to elastically support the front end of the glass surface temperature sensor on the glass surface. 3. The method of claim 2,
Wherein the sensor assembly further comprises a frequency changing unit for converting the compensated humidity data received from the control unit into a frequency signal and transmitting the frequency signal to the air conditioner control device. 3. The method of claim 2,
Further comprising a filter provided inside the case having the second through-hole formed therein for filtering the air that enters from the inside space of the vehicle through the receiving space. The method according to claim 1,
The case
A rectangular cover whose outer surface is attached to the windshield of the vehicle; And
The cover having a first and a second through-hole which are coupled to the upper portion to form one receiving space therein and which are exposed to the interior space of the vehicle from the receiving space, and a protruding portion projecting from the one wall surface And a body case having an opened receiving recess of the vehicle body. The method according to claim 1,
Wherein the case is attached to the glass surface using a double-sided adhesive agent. 3. The method of claim 2,
Wherein the acceleration processing includes averaging the humidity data periodically sensed by the temperature / humidity sensor to obtain an average value. 3. The method of claim 2,
Wherein the temperature compensation processing is performed in consideration of the temperature deviation value of the temperature / humidity sensor.

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