KR20050118924A - Sensing apparatus and method for applying the same - Google Patents

Abstract

It is an object of the present invention to provide a sensing device capable of sensing a harmful gas or temperature of outside air in one device.

To this end, the sensing device according to the present invention, the sensing device for detecting the state of the outside air, the case having a vent communicating with the outside on one side; A circuit board provided in the case and including a circuit unit; A noxious gas detection sensor electrically connected to the circuit unit and detecting a noxious gas contained in outside air introduced through the venting unit; A connector of the case, one end of which is connected to the circuit unit and the other end of which is connected to an external device; And a temperature sensor provided at the case or the connector to sense a temperature of the outside air.

Description

SENSING APPARATUS AND METHOD FOR APPLYING THE SAME}

The present invention relates to a sensing device mounted on a vehicle or the like and capable of sensing a harmful gas or temperature of an outside air, and more particularly, to a sensing device capable of sensing a harmful gas or temperature of an outside air in one device.

In general, the detection device is used in electrical connection with an external device, such as an external device to make the indoor environment comfortable, a harmful gas detection device for detecting harmful gases in the outside air, and a temperature detection for detecting the temperature of the outside air It is roughly classified as a device.

In particular, according to the prior art, the harmful gas detection device and the temperature detection device is mounted separately to the vehicle and performs its role.

Here, the conventional harmful gas detection apparatus, as shown in Figures 1 and 2, the case 10, the circuit portion (C) is built, and provided with a predetermined amount protruding from the left side of the case 10 of the outside air Toxic gas detection unit 20 for detecting a harmful gas, one end is provided on the right side of the case 10, the lead wire 30 is electrically connected to the circuit portion (C), and the other end of the lead wire 30 It is provided with a connector 40 is connected to the external device (not shown).

However, the harmful gas detection device, because a separate lead wire 30 is required in order to electrically connect the circuit portion (C) of the case 10 and the connector 40, the cost and workmanship accordingly There was a lot of demand, and the problem of getting larger.

On the other hand, the circuit portion C is composed of a circuit board 50 and a circuit unit 60 mounted on the circuit board 50.

In addition, in order to block water from flowing into the circuit board 50 and the circuit unit 60, the inner space of the case 10 is molded with an epoxy for waterproof 13.

However, as the circuit board 50 and the entire circuit unit 60 are coated with the waterproof epoxy 13, there is a problem in that, in the case of a circuit failure, repair is impossible.

In addition, the cost and workmanship according to the epoxy molding is required a lot, the weight is a factor that increases.

On the other hand, as shown in Figures 1 to 3, the noxious gas detector 20 is provided to protrude a predetermined amount from the left side of the case 10, and the ventilation portion (side) so that outside air can be introduced 21a) is formed so as to penetrate the upper and lower through the auxiliary case 21 and the extension case 22, which is built into the auxiliary case 21 and extends from the circuit board 50, to prevent harmful gas from the outside air. It consists of a harmful gas sensor 23 for detecting down.

In addition, the harmful gas detection unit 20 is provided on the upper / lower surface of the harmful gas sensor 23, the upper / lower membrane filter to block the inflow of fine dust to the harmful gas sensor 23 ( 24a and 24b and upper and lower protection meshes 25a and 25b respectively provided on the outer surfaces of the upper and lower membrane filters 24a and 24b to receive a heat source described later to evaporate moisture and to block relatively large foreign substances. ) Is included.

However, the harmful gas detector 20 requires two membrane filters 24a and 24b and two protective wire meshes 25a and 25b due to the structure of the auxiliary case 21 and the harmful gas sensor 23. Because of the structure, the material cost and the labor is doubled, there is a problem that the size increases.

Meanwhile, as shown in FIG. 3, the circuit unit 60 detects an input terminal 60a through which power is input into the circuit unit C, and reverse voltage and surge of the power input through the circuit unit C. To stop the driving of the circuit unit 60, if necessary, by correcting the power passed through the reverse voltage / surge protection circuit 61 and the reverse voltage / surge protection circuit 61 to drive the power supply to the circuit unit 60. A thermal power circuit 63 for applying heat to the noxious gas detection sensor 23 to analyze the noxious gas in contact with or surrounding the noxious gas detection sensor 23. Is made of.

In addition, the circuit unit 60 includes a converter 64 for converting a signal output from the noxious gas sensor 23 into a frequency signal, and a micom 65 for calculating a control signal based on the frequency signal. And an output matching circuit 66 for matching the control signal, an output driving circuit 67 for transmitting the matched control signal to an external device (not shown), and an output terminal 60b for outputting the control signal to the outside. ) Is included.

In addition, the circuit unit 60 includes an overvoltage detection circuit 69 which detects an overvoltage that may occur during the driving of the circuit unit 60 and stops the driving of the circuit unit 60 as necessary. do.

However, in the circuit unit 60 described above, since the driving power supply circuit 62 and the thermal power supply circuit 63 are separately provided, a lot of cost and labor are required, and the size of the circuit board 50 is large. . In particular, as the size of the circuit board 50 increases, there is a problem that the size of the case 10 ultimately increases.

In addition, the above-described circuit unit 60, because the microcomputer 65, the overvoltage detection circuit 68, and the output matching circuit 66 is provided separately, it requires a lot of cost and work maneuver, the circuit board 50 There was a problem of increasing the size. In particular, as the size of the circuit board 50 increases, there is a problem that the size of the case 10 ultimately increases.

On the other hand, the conventional temperature sensing device, as shown in Figure 4, is provided in the vehicle and the like separately from the harmful gas detection device to detect the temperature of the outside air, the case 71 and the temperature sensor built in the case (Not shown).

However, since the temperature detection device is provided separately from the harmful gas detection device, a separate case (see 10 of FIG. 1 and 71 of FIG. 4) is required for manufacturing, and a separate lead wire for electrical connection with an external device. There was a problem such that an accessory such as this is required.

The present invention is to solve the problems of the prior art, an object of the present invention, to provide a sensing device that can sense the harmful gas or temperature of the outside air in one device.

Another object of the present invention is to provide a sensing device that can reduce the size, cost, and weight.

Another object of the present invention is to provide a method of operating a sensing device that selectively detects noxious gases or temperature of the outside air by separating the sensing device according to an option of the device.

In order to achieve the above object, the sensing device according to the present invention, the sensing device for detecting the state of the outside air, a case having a vent communicating with the outside on one side; A circuit board provided in the case and including a circuit unit; A noxious gas detection sensor electrically connected to the circuit unit and detecting a noxious gas contained in outside air introduced through the venting unit; A connector provided in the case, one end of which is connected to the circuit unit and the other end of which is connected to an external device; And a temperature sensor provided at the case or the connector to sense a temperature of the outside air.

Here, the temperature sensor is preferably provided in the housing forming the outer periphery of the connector.

In addition, the connector with the temperature sensor is more preferably provided detachably to the case.

On the other hand, the operating method of the sensing device according to the present invention, if the device requires only harmful gas detection, connecting only the case containing the harmful gas detection sensor to the external device while removing the connector; If the device requires only temperature sensing, connecting only the connector including the temperature sensing sensor to the external device; And connecting the connector to the connector to the case and then connecting the connector to the external device, if the device requires both hazardous gas detection and temperature sensing.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 5 is a combined perspective view illustrating a sensing device capable of detecting a harmful gas or temperature of outside air together according to an embodiment of the present invention, and FIG. 6 is a II-II cross-sectional view of FIG. 5.

5 and 6, the sensing device according to an embodiment of the present invention, and a case 100 having a vent portion (100a) in communication with the outside on one side; A circuit board 300 provided inside the case 100 and including a circuit unit 200; A noxious gas detector 400 electrically connected to the circuit unit 200 and detecting a noxious gas contained in outside air introduced through the venting unit 100a and outputting a corresponding signal; A connector 500 provided at the other side of the case 100, one end of which is directly connected to the circuit unit 200 and the other end of which is directly connected to an external device (not shown): the case 100 or the connector It is provided in any one of 500 includes a temperature sensor 600 for sensing the temperature of the outside air.

Here, the case 100 has a structure separated into a first member 110 covering the upper portion of the circuit board 300 and a second member 120 covering the lower portion of the circuit board 300. desirable. This is because the circuit board 300 can be easily taken out and replaced or repaired from the case 100 when the circuit board 300 is broken.

In addition, the case 100 may further include a seal 130 between the first member 110 and the second member 120 for sealing. In particular, the seal 130 plays the same role as the conventional epoxy (see 13 in FIG. 2), but has the following differences.

That is, the conventional epoxy is injected into the case (see 10 of FIG. 2) and applied to the entire circuit board (see 50 of FIG. 2), whereas the seal 130 is made of the first member 110 and the first. By sealing only the gap that is the surface that the two members 120 contact, the seal 130 can reduce the weight, compared to the conventional epoxy (see 13 in Fig. 2), it is possible to reduce the weight, consumption of material It also reduces costs.

On the other hand, Figure 7 is a circuit diagram showing a circuit unit of the sensing device according to an embodiment of the present invention.

As illustrated in FIG. 7, the circuit unit 200 preferably includes a reverse voltage / surge protection circuit 210, a power integrated circuit 220, and a signal circuit unit 230.

Here, the reverse voltage / surge protection circuit 210 detects the reverse voltage and the surge of the power input to the circuit unit 200 and stops the driving of the circuit unit 200 as necessary. .

In addition, the power integrated circuit 220 has a function of applying a driving power to the circuit unit 200 by correcting the power passed through the reverse voltage / surge protection circuit 210 and the harmful gas detection unit 400. In addition, it performs the function of applying thermal power.

In particular, the power integrated circuit 220 integrates a conventional driving power circuit (see 62 in FIG. 2) and a thermal power circuit (see 63 in FIG. 2), and mounts the circuit unit 200 as much as the integrated circuit. It is possible to reduce the area, thereby reducing the size of the circuit board 300, and ultimately to reduce the size of the case (100). Of course, it would be natural to reduce the cost of reducing the size.

In detail, the power integrated circuit 220 may be integrated in one IC circuit to simultaneously perform the function of applying the driving power and the function of applying the thermal power.

The signal circuit 230 generates a control signal based on the signal output from the noxious gas detector 400 and transmits the control signal to an external device (not shown).

Specifically, as shown in FIG. 7, the signal circuit 230 includes a converter 231, a multifunction circuit 232, and an output driving circuit 233.

Here, the converter 231 serves to convert the signal of the noxious gas detector 400 into a frequency signal.

The multifunction circuit 232 performs a function of calculating a control signal based on the frequency signal and a function of matching the control signal.

In particular, the multi-function circuit 232 integrates a conventional microcomputer (see 65 in FIG. 3) and an output matching circuit (see 66 in FIG. 3), and reduces the mounting portion of the circuit unit 200 as much as the integrated circuit. In this case, the size of the circuit board 300 may be reduced, and ultimately, the size of the case 100 may be reduced. Of course, it would be natural to reduce the cost of reducing the size.

In addition, the multifunction circuit 232 may further include a function of detecting an overvoltage that may occur during the driving of the circuit unit 200 and stopping the driving of the circuit unit 200 as necessary. Do.

The reason is that a single multi-function circuit in charge of the three functions rather than a single multi-function circuit 232 can reduce the size and cost of the device.

Specifically, the multi-function circuit 232, a microcomputer (MICOM) to perform the function of calculating the control signal, the function of matching the control signal, and the function of stopping the driving of the circuit unit 200 at the same time. It would be more desirable to have it integrated therein.

In addition, the output driving circuit 233 serves to transfer the matched control signal of the multifunction circuit 232 to an external device (not shown). In addition, the output driver circuit 233 preferably employs an output driver transistor (Output Driver TR).

On the other hand, the harmful gas detection unit 400, as shown in Figure 5 and 6, that is provided in the venting portion (100a) of the case 100 is that foreign matter is introduced into the case 100 The foreign matter blocking member 410 for filtering the outside air introduced through the vent 100a and the one side of the circuit board 300 are provided to prevent the foreign material blocking member 410 from one side and the other surface of the foreign matter blocking member 410. It is preferably made to include a harmful gas detection sensor 420 is provided to correspond to the harmful gas of the outside air passing through the foreign matter blocking member 410.

In addition, the harmful gas detection unit 400, it is further preferred to further include a cap (430; cap) for smoothly inflow of outside air into the vent (100a) of the case (100).

Specifically, the cap 430, a plurality of openings 430a are formed in the side surface corresponding to the flow direction of the outside air, the guide flow path for guiding the outdoor air introduced into the opening 430a to the venting portion (100a) The portion 430b is formed.

And, the cap 430, serves to protect the foreign matter blocking member 410 together.

In addition, the foreign matter blocking member 410, more preferably, a membrane filter (membrain filter) to block the dust or moisture and let the outside air pass.

Hereinafter, the temperature sensor will be described in detail with reference to FIGS. 5, 7, and 8.

8 is an exploded perspective view showing a sensing device capable of detecting a harmful gas or temperature of outside air together according to an embodiment of the present invention.

The temperature sensor 600 detects the temperature of the outside air in order to maintain the room temperature at an appropriate temperature. Hereinafter, the temperature sensor 600 will be described based on the mounting position of the sensor and the characteristics of the structure.

The temperature sensor 600 is preferably provided in the case 100 or the connector 500.

The reason is that since there is no need for a separate temperature sensor case (see 71 of FIG. 4) to protect the temperature sensor 600 as in the related art, the cost and overall size thereof can be reduced accordingly.

In addition, since an accessory such as a separate lead wire for electrically connecting the external device (not shown) and the temperature sensor 600 as in the related art is not required, the cost and overall size thereof can be reduced accordingly.

In addition, the temperature sensor 600, as shown in Figures 5 and 8, is provided in the housing 510 forming the outside of the connector 500, the connector 500, shown in Figure 8 As described above, it is more preferable that the case 100 is detachably provided.

The reason is that depending on the device (for example, a vehicle, etc.) that needs a sensing device, there may be a device that requires only the harmful gas detection sensor 420, on the other hand, only need the temperature sensor 600 There may be a device, and on the other hand, there may be a device requiring both the harmful gas sensor 420 and the temperature sensor 600.

In other words, if only one sensor is required according to the option of the device, the connector 500 (that is, the air conditioner) is removed from the connector 500 (that is, the temperature sensor 600 with the connector 500 removed). ) Part may be fastened only, or the connector 500 may be fastened only to a part (that is, a part having a noxious gas sensor 420).

Specifically, the connector 500 with the temperature sensor 600, as shown in Figure 7, the input terminal 200a, the output terminal 200b, the ground terminal 200c of the circuit unit 200 In addition, the input terminal 600a and the output terminal 600b of the temperature sensor 600 may be a 5-pin connector. Furthermore, it will be more preferable to have a structure in which the ball pin of the margin can be further provided in the connector 500.

On the other hand, the operating method of the sensing device according to an embodiment of the present invention, is performed as follows according to the option of the device.

When the device requires only temperature sensing, only the connector 500 including the temperature sensing sensor 600 is pin-coupled to an external device (not shown).

In addition, when the device needs only harmful gas detection, only the case 100 including the noxious gas sensor 420 is pinned to an external device while the connector 500 is separated.

Finally, when the device requires both temperature sensing and hazardous gas sensing, the connector 500 is pin-coupled to the case 100 and then the connector 500 is pin-coupled to an external device.

So far, the present invention has been described with reference to preferred embodiments thereof, and those skilled in the art to which the present invention pertains will have detailed descriptions of the present invention and other forms of embodiments within the essential technical scope of the present invention. Could be implemented. Here, the essential technical scope of the present invention is shown in the claims, and all differences within the equivalent range will be construed as being included in the present invention.

As described above, the sensing device and its operation method according to the present invention has the following advantages.

According to the present invention, since the harmful gas sensor and the temperature sensor are provided in one device, since there is no need for a separate case for the temperature sensor for protecting the conventional temperature sensor, the cost and overall size accordingly Can be reduced.

In addition, according to the present invention, since there is no need for an accessory such as a lead wire for electrically connecting the external device and the temperature sensor as in the related art, the cost and overall size thereof can be reduced accordingly.

 In addition, according to the present invention, when only one sensor is required according to the option of the device, only the connector may be fastened to an external device while the case and the connector are separated, or only the part without the connector may be fastened. Accordingly, there is an advantage that no cost is incurred for the remaining parts that do not require fastening.

It also encompasses all the effects mentioned in the detailed description of the invention.

1 is a perspective view showing a conventional harmful gas detection device.

2 is a cross-sectional view taken along line II of FIG. 1.

3 is a circuit diagram showing a circuit unit of a conventional harmful gas detection device.

Figure 4 is a perspective view showing a conventional temperature sensing device.

5 is a perspective view showing a detection device according to an embodiment of the present invention, which can detect a harmful gas or temperature of the outside air together.

FIG. 6 is a II-II cross-sectional view of FIG. 5. FIG.

7 is a circuit diagram showing a circuit unit of the sensing device according to the embodiment of the present invention.

8 is an exploded perspective view showing a detection device according to an embodiment of the present invention, which may detect a harmful gas or temperature of outside air together.

Claims (4)

In the sensing device for detecting the state of the outside air, A case having a ventilation part communicating with the outside at one side; A circuit board provided in the case and including a circuit unit; A noxious gas detection sensor electrically connected to the circuit unit and detecting a noxious gas contained in outside air introduced through the venting unit; A connector provided in the case, one end of which is connected to the circuit unit and the other end of which is connected to an external device; And A temperature sensor provided in the case or the connector to sense a temperature of outside air; Sensing device comprising a. The method of claim 1, The temperature sensor, Sensing device, characterized in that provided in the housing forming the outer periphery of the connector. The method according to claim 1 or 2, The connector, Sensing device, characterized in that provided in the case detachable. If the device requires only harmful gas detection, connecting only the case including the noxious gas detection sensor to the external device while removing the connector; If the device requires only temperature sensing, connecting only the connector including the temperature sensing sensor to the external device; And Connecting the connector to the case and then connecting the connector to the external device when the device requires both harmful gas detection and temperature detection; Method of operating the sensing device of claim 3 selectively performed according to the option of the device, including.