CN217133027U - Sensor structure and air purifier - Google Patents
Sensor structure and air purifier Download PDFInfo
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- CN217133027U CN217133027U CN202220167477.9U CN202220167477U CN217133027U CN 217133027 U CN217133027 U CN 217133027U CN 202220167477 U CN202220167477 U CN 202220167477U CN 217133027 U CN217133027 U CN 217133027U
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Abstract
The utility model discloses a sensor structure and air purifier, it relates to air purification technical field, the sensor structure includes: a substrate; the gas sensor is an electrochemical sensor, and the heating unit is used for heating the gas sensor. The gas sensor can solve the problem that the gas sensor fails after contacting high-concentration sensitive gas.
Description
Technical Field
The utility model relates to an air purification technical field, in particular to sensor structure and air purifier.
Background
When an electrochemical sensor type gas sensor is exposed to a sensitive gas with a high concentration, the gas sensor may malfunction and cannot recover its function by itself. When such a gas sensor is installed in an electric appliance used by a user, for example, in an air cleaner having a gas detection function, the gas sensor is easily exposed to various sensitive gases in the home of a general user, and thus malfunction occurs. At this moment, when the manufacturer maintains, can only change the gas sensor among the air purifier for the user, the cost is higher and loaded down with trivial details, leads to user experience to feel relatively poor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned defect of prior art, the embodiment of the utility model provides a technical problem that will solve provides a sensor structure and air purifier, and it can solve gas sensor and appear malfunctioning problem behind the sensitive gas of contact high concentration.
The embodiment of the utility model provides a concrete technical scheme is:
a sensor structure, the sensor structure comprising:
a substrate;
the gas sensor is an electrochemical sensor, and the heating unit is used for heating the gas sensor.
Preferably, the gas sensor is a formaldehyde sensor.
Preferably, the heating unit is disposed between the substrate and the gas sensor.
Preferably, the gas sensor is closely arranged on the heating unit, or a heat-conducting medium is arranged between the gas sensor and the heating unit.
Preferably, the heating unit comprises at least one of: heating film, heating plate, heating block.
Preferably, the heating unit is sleeved or wound on the gas sensor.
Preferably, the sensor structure further comprises:
a temperature detection member for detecting a temperature of the gas sensor;
and the control unit is electrically connected with the temperature detection piece and the heating unit, and when the temperature of the gas sensor detected by the temperature detection piece reaches a first preset temperature, the control unit controls the heating unit to stop heating.
Preferably, when the temperature of the gas sensor detected by the temperature detection member is lower than a second preset temperature, the control unit controls the heating unit to start heating, and the second preset temperature is lower than the first preset temperature.
Preferably, the control unit includes a timing unit, and when the heating time or the accumulated heating time of the heating unit detected by the timing unit reaches a first preset time, the control unit controls the heating unit to stop heating.
Preferably, the control unit includes a timing unit, and when the time when the temperature of the gas sensor detected by the temperature detection member reaches a third preset temperature reaches a second preset time, the control unit controls the heating unit to stop heating.
Preferably, the first preset temperature is higher than the third preset temperature.
Preferably, the substrate has a first surface and a second surface corresponding to each other, the first surface is provided with the gas sensor and the heating unit, and the second surface is provided with the temperature detecting member.
Preferably, the temperature detection member includes a thermistor.
Preferably, the sensor structure further comprises:
and the control unit is electrically connected with the heating unit and the gas sensor and comprises a timing unit, and when the timing unit detects that the gas content detected by the gas sensor reaches a preset condition and exceeds a third preset time, the control unit controls the heating unit to start heating.
An air purifier comprising a sensor arrangement as claimed in any preceding claim.
The technical scheme of the utility model following beneficial effect that is showing has:
the utility model provides a be provided with the gas sensor of electrochemistry sensor type on the base of sensor structure and to the heating element that gas sensor carries out the heating, when gas sensor appears malfunctioning behind the sensitive gas of contact high concentration, the sensor structure can start heating element by oneself to heat gas sensor, realize the activation heating to gas sensor, will occupy the sensitive gas molecule of catalyst activity position among the gas sensor and drive and leave, and then make the gas sensor after the malfunction resume normally. The gas sensor after recovering can be close to gas sensor initial condition, and the gas sensor after malfunctioning can resume normal through activation many times, so improved sensor structure's life greatly.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.
Fig. 1 is a schematic structural diagram of a sensor structure in an embodiment of the present invention;
fig. 2 is an explosion diagram of a sensor structure according to an embodiment of the present invention.
Reference numerals of the above figures:
1. a substrate; 11. a first side; 12. a second face; 2. a gas sensor; 3. a heating unit; 4. a connecting mechanism; 5. a temperature detection member; 6. a control unit.
Detailed Description
The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to solve the problem that the gas sensor fails after contacting the high-concentration sensitive gas, the present application provides a sensor structure, fig. 1 is the embodiment of the present invention provides a structural schematic diagram of the sensor structure, fig. 2 is the embodiment of the present invention provides an explosion schematic diagram of the sensor structure, as shown in fig. 1 and fig. 2, the sensor structure can include: a substrate 1; a gas sensor 2 and a heating unit 3 disposed on the substrate 1, the gas sensor 2 being an electrochemical sensor, the heating unit 3 being for heating the gas sensor 2.
The utility model provides a be provided with the gas sensor 2 of electrochemical sensor type and carry out the heating element 3 that heats to gas sensor 2 on the basement 1 of sensor structure, when gas sensor 2 appears malfunctioning behind the sensitive gas of contact high concentration, the sensor structure can start heating element 3 by oneself, thereby heat gas sensor 2, the realization is to gas sensor 2's activation heating, the sensitive gas molecule that will occupy catalyst activity position among the gas sensor 2 drives away, and then make the gas sensor 2 after malfunctioning resume normally. The recovered gas sensor 2 can be close to the initial state of the gas sensor 2, and the gas sensor 2 after failure can be recovered to be normal through multiple times of activation, so that the service life of the sensor structure is greatly prolonged.
In order to better understand the sensor structure in the present application, it will be further explained and illustrated below. As shown in fig. 1 and 2, the sensor structure in the embodiment of the present application may include: a substrate 1; a gas sensor 2 and a heating unit 3 disposed on the substrate 1. The gas sensor 2 and the heating unit 3 may be directly mounted on the substrate 1 or indirectly mounted on the substrate 1, and are not particularly limited in this application.
As shown in fig. 1 and 2, a substrate 1 is used to fix a gas sensor 2 and a heating unit 3, and at the same time, the entire sensor structure can be mounted on other parts or devices by the substrate 1 and a connection mechanism 4 provided on the substrate 1, and the connection mechanism 4 can be pin-lined. In order to allow sufficient space for arranging the gas sensor 2 and the heating unit 3, the substrate 1 extends generally in a horizontal direction and has a plate shape.
The substrate 1 may be a Printed Circuit Board (PCB) substrate, which serves as a support for electronic components, thereby implementing a carrier for electrical interconnection of the electronic components. The substrate may be a Ball Grid Array (Ball Grid Array) substrate, a lead frame (lead frame), a copper foil substrate, a resin substrate, or other types of substrates. A specific kind of substrate may be selected according to the specifications of the pins of the gas sensor 2 and the heating unit 3 provided on the substrate 1.
As shown in fig. 1 and 2, the gas sensor 2 is disposed on a substrate 1. Therein, the substrate 1 may comprise a first side 11 and a second side 12 opposite. The gas sensor 2 may be fixedly disposed on the first surface 11 of the substrate 1, and the gas sensor 2 and the substrate 1 may be electrically connected through a conductive wire, or may be electrically connected in a flip-chip manner through a solder ball, and the specific connection form is not specifically limited in this application. As a practical matter, if the side of the gas sensor 2 is electrically connected to the substrate 1 through a conductive wire, the gas sensor 2 and the substrate 1 may be provided with an adhesive material to increase the connection strength therebetween.
As shown in fig. 1 and 2, the heating unit 3 is used to heat the gas sensor 2. The gas sensor 2 is an electrochemical sensor. In an actual household environment, the active sites of the catalyst of the gas sensor 2 of the electrochemical sensor type are sometimes occupied by sensitive gas molecules for a long time, resulting in abnormal readings of the sensor. By heating the gas sensor 2 using the heating unit 3, gas molecules adsorbed on the catalyst are desorbed from the active sites of the catalyst, so that the activity of the catalyst is recovered, and the performance of the gas sensor 2 of the electrochemical sensor type is recovered to normal. For example, the gas sensor may be a formaldehyde sensor, which is used for measuring the formaldehyde content in the air, and the active site of the catalyst of the gas sensor may be occupied by sensitive gas molecules for a long time, which may cause abnormal readings of the sensor. Of course, the gas sensor may be other sensors, and is not limited in any way in this application.
In one possible embodiment, as shown in fig. 1 and 2, a heating unit 3 may be provided between the substrate 1 and the gas sensor 2. For example, the heating unit 3 may be disposed between the substrate 1 and the gas sensor 2 in the type of a heating film, a heating sheet, or a heating block. In this way, a large contact area between the heating unit 3 and the gas sensor 2 can be provided, so that heat generated by the heating unit 3 is transferred to the gas sensor 2. Meanwhile, the contact area between the heating unit 3 and the gas sensor 2 can cover the whole bottom surface of the gas sensor 2, so that the gas sensor 2 can be uniformly heated, and the problem of overhigh local heating temperature is avoided. The heating unit 3 may preferably be a heating film, which further reduces the thickness of the entire sensor structure. For example, the heating film may be a PI heating film, a graphene heating film, or the like.
In the above embodiment, the side of the heating unit 3 may be electrically connected to the substrate 1, so as to supply and control power to the heating unit 3. For example, pad holes on the side of the heating unit 3 may be connected to the pins on the substrate 1 by soldering. For another example, when the area of the heating unit 3 covers the entire bottom of the gas sensor 2, the side wall of the gas sensor 2 may be connected to the substrate 1 through a conductive line.
As a practical matter, the gas sensor 2 may be arranged in close contact with the heating unit 3, so that the thermal conductivity between the two can be ensured. Alternatively, a heat conducting medium may be disposed between the gas sensor 2 and the heating unit 3, and the heat conductivity between the two is ensured by the heat conducting medium, for example, a heat conducting silica gel with excellent heat conducting performance may be used as the heat conducting medium.
In other possible embodiments, the heating unit 3 may be sleeved or wound on the gas sensor 2. In this embodiment, the gas sensor 2 can be directly connected to the substrate 1 in contact therewith, and the firmness of the connection of the gas sensor 2 can be effectively ensured. The heating unit 3 may be provided in a film shape to be fitted around the gas sensor 2, may be cylindrical, and may be fitted around the side wall of the gas sensor 2, or may be provided in a linear shape to be wound around the side wall of the gas sensor 2.
As shown in fig. 1 and 2, the sensor structure may include, as a practical matter: a temperature detection member 5 for detecting the temperature of the gas sensor 2; and a control unit 6 electrically connected to the temperature detecting member 5 and the heating unit 3, wherein the control unit 6 controls the heating unit 3 to stop heating when the temperature of the gas sensor 2 detected by the temperature detecting member 5 reaches a first preset temperature. To avoid occupying space on the first side 11 of the substrate 1, the temperature detection member 5 and the control unit 6 may be mounted on the second side 12 of the substrate 1. Of course, the temperature detecting member 5 and the control unit 6 may be mounted on the first surface 11 of the substrate 1, and no particular limitation is imposed thereon. As a practical matter, the temperature detection member 5 may employ a thermistor. The temperature detection member 5 is disposed as closely as possible to the second face 12 of the substrate 1, which enables a temperature to which the gas sensor 2 is heated by the heating unit 3 to be measured relatively accurately, thereby controlling the temperature in real time. The temperature detecting member 5 may be plural, and is located at different positions of the substrate 1, generally in the area covered by the bottom surface of the gas sensor 2, so that the accuracy of detecting the temperature of the gas sensor 2 can be improved.
Since the gas sensor 2 is an electrochemical sensor, an electrolyte liquid is contained therein. If the heating temperature of the heating unit 3 is too high, the electrolyte liquid may be volatilized, thereby causing the gas sensor 2 to fail.
Through adopting heating unit 3 to heat gas sensor 2, make the desorption of adsorbed gas molecule from the active position of catalyst on the catalyst, this temperature that needs to make gas sensor 2 be after the heating reaches the time that satisfies the requirement, and the temperature after this heating is difficult too high, consequently, when gas sensor 2's temperature reaches first predetermined temperature, control unit 6 needs control heating unit 3 to stop heating to avoid heating unit 3 to heat constantly and lead to too high temperature. In general, the first preset temperature may be slightly higher than the temperature at which the gas sensor 2 can be activated by normal heating, for example, the temperature at which the gas sensor 2 can be activated by normal heating is about 40 degrees, and then the first preset temperature may be set to 43 degrees, 45 degrees, 47 degrees, or the like.
In order to maintain the gas sensor 2 in the vicinity of the activation enabling temperature as much as possible, the control unit 6 controls the heating unit 3 to start heating when the temperature of the gas sensor 2 detected by the temperature detecting member 5 is lower than a second preset temperature, which is lower than the first preset temperature. Of course, the second preset temperature may also be lower than the temperature at which the gas sensor 2 can be activated by normal heating. When the temperature of the gas sensor 2 is reduced to the second preset temperature in the above manner, the heating unit 3 is turned on again to heat, so that the temperature of the gas sensor 2 is increased to the temperature at which activation can be performed again.
Since the time when the temperature of the gas sensor 2 reaches the activation temperature needs to reach the time meeting the requirement before the gas sensor 2 can be sufficiently activated, in a possible embodiment, the control unit 6 may include a timing unit, and when the heating time or the accumulated heating time of the heating unit 3 detected by the timing unit reaches the first preset time, the control unit 6 controls the heating unit 3 to stop heating. In this embodiment, the heating time of the heating means 3 is counted or the heating time is accumulated to control the heating means 3 to stop heating, so that the time until the temperature of the gas sensor 2 reaches the activation temperature after heating substantially reaches the time that satisfies the requirement.
In another possible embodiment, the control unit 6 may include a timing unit, and the control unit 6 controls the heating unit 3 to stop heating when the time when the temperature of the gas sensor 2 detected by the temperature detecting member 5 reaches the third preset temperature reaches the second preset time. The third preset temperature may be a temperature at which the gas sensor 2 can be activated, and thus, the first preset temperature is higher than the third preset temperature. The second preset time may be any time that the time required for the temperature of the gas sensor 2 after heating to reach the activation temperature needs to reach the time that satisfies the requirement, or a time longer than the above time. By the above manner, the time for the temperature of the gas sensor 2 to reach the activation temperature after heating can be accurately obtained.
As a possibility, the control unit 6 may include a timing unit, and when the timing unit detects that the gas content detected by the gas sensor 2 reaches the preset condition for more than a third preset time, the control unit 6 controls the heating unit 3 to start heating. When the gas content detected by the gas sensor 2 reaches the preset condition for more than the third preset time, for example, the corresponding gas content detected by the gas sensor 2 exceeds the standard or is abnormal for a third preset time with a fixed length, and the abnormal change is recovered, which indicates that the gas sensor 2 has failed, the gas sensor 2 starts to be heated by the heating unit 3, so as to activate the gas sensor 2.
The sensor structure in this application not only can heat activation to gas sensor 2 to make the gas sensor 2 after malfunctioning resume normally, the sensor structure still has the temperature control function moreover, and it can effectual control carry out the time of heating activation and the temperature of heating activation to gas sensor 2, avoids gas sensor 2 to be unable reuse because of the permanent inefficacy that heating temperature too high leads to. The sensor structure integrates the functions, and can be directly mounted on a required component or device for direct use.
There is also provided in the present application an air purifier comprising a sensor arrangement as defined in any one of the above.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
The above embodiments are only embodiments of the present invention, and although the embodiments of the present invention are disclosed as above, the contents are only embodiments adopted for facilitating understanding of the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A sensor structure, characterized in that it comprises:
a substrate;
the gas sensor is an electrochemical sensor, and the heating unit is used for heating the gas sensor;
the heating unit is arranged between the substrate and the gas sensor, the gas sensor is arranged on the heating unit in a clinging manner, or a heat-conducting medium is arranged between the gas sensor and the heating unit;
or the heating unit is sleeved or wound on the gas sensor.
2. The sensor structure according to claim 1, characterized in that the gas sensor is a formaldehyde sensor.
3. The sensor structure according to claim 1, wherein when the heating unit is disposed between the substrate and the gas sensor, the heating unit comprises at least one of: heating film, heating plate, heating block.
4. The sensor structure of claim 1, further comprising:
a temperature detection member for detecting a temperature of the gas sensor;
and the control unit is electrically connected with the temperature detection piece and the heating unit, and when the temperature of the gas sensor detected by the temperature detection piece reaches a first preset temperature, the control unit controls the heating unit to stop heating.
5. The sensor structure according to claim 4, wherein the control unit controls the heating unit to start heating when the temperature of the gas sensor detected by the temperature detecting member is lower than a second preset temperature that is lower than the first preset temperature.
6. The sensor structure according to claim 4, wherein the control unit includes a timing unit that controls the heating unit to stop heating when the heating time or the accumulated heating time of the heating unit detected by the timing unit reaches a first preset time.
7. The sensor structure according to claim 4, wherein the control unit includes a timing unit that controls the heating unit to stop heating when a time at which the temperature of the gas sensor detected by the temperature detecting member reaches a third preset temperature reaches a second preset time.
8. The sensor structure according to claim 7, characterized in that said first preset temperature is higher than said third preset temperature.
9. The sensor structure according to claim 4, wherein the substrate has a first face and a second face that correspond, the first face having the gas sensor and the heating unit disposed thereon, the second face having the temperature detecting member disposed thereon.
10. The sensor structure according to claim 4, characterized in that the temperature detecting member comprises a thermistor.
11. The sensor structure of claim 1, further comprising:
and the control unit is electrically connected with the heating unit and the gas sensor and comprises a timing unit, and when the timing unit detects that the gas content detected by the gas sensor reaches a preset condition and exceeds a third preset time, the control unit controls the heating unit to start heating.
12. An air purifier, characterized in that it comprises a sensor arrangement according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220167477.9U CN217133027U (en) | 2022-01-21 | 2022-01-21 | Sensor structure and air purifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220167477.9U CN217133027U (en) | 2022-01-21 | 2022-01-21 | Sensor structure and air purifier |
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| CN217133027U true CN217133027U (en) | 2022-08-05 |
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| CN202220167477.9U Active CN217133027U (en) | 2022-01-21 | 2022-01-21 | Sensor structure and air purifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118090871A (en) * | 2024-04-17 | 2024-05-28 | 珠海格力电器股份有限公司 | Formaldehyde detection equipment control method, device and system and formaldehyde detection equipment |
-
2022
- 2022-01-21 CN CN202220167477.9U patent/CN217133027U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118090871A (en) * | 2024-04-17 | 2024-05-28 | 珠海格力电器股份有限公司 | Formaldehyde detection equipment control method, device and system and formaldehyde detection equipment |
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