Air purifier warning circuit

Abstract

The utility model relates to the technical field of air purifiers, in particular to an air purifier warning circuit which comprises a control chip U41, a first lamp set, a second lamp set, a first switch module, a second switch module, a light sensation module and an air quality sensor U42. The control chip U41 is provided with a first output end, a second output end and a third output end; the control chip U41 controls the brightness of the first lamp set and the second lamp set through the light sensation module. According to the utility model, the first lamp group and the second lamp group are arranged, the quality can be controlled according to the environment, different lamp groups can emit light so as to remind a user, in addition, the first lamp group and the second lamp group comprise a plurality of LEDs, and the plurality of LEDs can be arranged at different places, so that the user can observe conveniently; and secondly, by arranging the light sensation module, the brightness of the lamp set can be changed, and the comfortable brightness under different environment light intensities is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to air purifier technical field, concretely relates to a kind of air purifier warning circuit. BACKGROUND

[0002] With the development of modern society, air pollution problem is increasingly serious, and the influence of air quality on human health is also more and more concerned. As an important equipment for improving indoor air quality, air purifier has become a necessity for many families and public places. In the air purifier, in order to show the current air quality state to the user more intuitively, air quality warning circuit is usually designed, and different color indicator lights (such as red and green lights) are used to prompt the user the quality of air.

[0003] At present, only a single red light and a single green light are usually set for air quality indication, and when the user observes from different angles or distances, it may be difficult to intuitively distinguish the state of the light, resulting in the user experience being affected.

[0004] In addition, the existing indicator light generally adopts fixed brightness design, and cannot automatically adjust the luminous brightness according to the strength of ambient light. In dark environment, the indicator light may be too dazzling, and in strong light environment, the indicator light may not be clear enough, reducing the effectiveness of light prompt. UTILITY MODEL CONTENT

[0005] The utility model aims at the above-mentioned deficiencies in the prior art, and provides an air purifier warning circuit.

[0006] The utility model aims at the above-mentioned deficiencies in the prior art, and provides an air purifier warning circuit.

[0007] The control chip U41 is provided with a first output end, a second output end and a third output end; the first lamp group is connected with the first output end through the first switch module; the second lamp group is connected with the second output end through the second switch module; the air quality sensor U42 is connected with the third output end; the control chip U41 controls the brightness of the first lamp group and the second lamp group through the light sensing module.

[0008] The utility model further sets up, the light feeling module includes photosensitive resistance RA, resistance R40, resistance R45 and triode Q41, the control chip U41 is equipped with PWM end and collection end, one end of photosensitive resistance RA is grounded, the other end of photosensitive resistance RA is connected with collection end, the other end of photosensitive resistance RA is connected with the external power supply after resistance R45, the PWM end is connected with the base of triode Q41 after resistance R40, the emitter of triode Q41 is connected with the external power supply, the collector of triode Q41 is connected with one end of first lamp group and one end of second lamp group respectively.

[0009] The utility model further sets up, the first switch module includes triode Q42, resistance R46 and resistance R47, the first output is connected with the base of triode Q42 after resistance R46, the base of triode Q42 is grounded through resistance R47, the emitter of triode Q42 is grounded, the collector of triode Q42 is connected with the other end of first lamp group.

[0010] The utility model further sets up, the first lamp group includes resistance R42, resistance R44, a plurality of first green LED and a plurality of second green LED, resistance R42 and a plurality of first green LED are connected in series and are located between the collector of triode Q42 and the collector of triode Q41, resistance R44 and a plurality of second green LED are connected in series and are located between the collector of triode Q42 and the collector of triode Q41.

[0011] The utility model further sets up, the second switch module includes triode Q43, resistance R48 and resistance R49, the second output is connected with the base of triode Q43 after resistance R48, the base of triode Q43 is grounded through resistance R49, the emitter of triode Q43 is grounded, the collector of triode Q43 is connected with the other end of second lamp group.

[0012] The utility model further sets up, the second lamp group includes resistance R41, resistance R43, a plurality of first red LED and a plurality of second red LED, resistance R41 and a plurality of first red LED are connected in series and are located between the collector of triode Q43 and the collector of triode Q41, resistance R43 and a plurality of second red LED are connected in series and are located between the collector of triode Q43 and the collector of triode Q41.

[0013] The utility model further sets up, triode Q41 is PNP triode.

[0014] The utility model further sets up, triode Q42 is PNP triode.

[0015] The triode Q43 is a PNP triode.

[0016] The utility model discloses the beneficial effect has: the utility model discloses a first lamp group and second lamp group can be controlled according to the quality of environment, make different lamp group emit light to remind the user, in addition, the first lamp group and second lamp group include a plurality of LED, can set up a plurality of LED in different place to facilitate the user observation, secondly, through setting up the light feeling module, can change the brightness of lamp group, guarantee the comfortable brightness under different ambient light intensity. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model makes further explanation to the practical new type with the drawing, but the embodiment in the drawing does not constitute any limit to the practical new type, for the ordinary skill in the art, under the premise of not paying the creative labor, can also obtain other drawings according to the following drawing.

[0018] Figure 1 It is the circuit schematic diagram of the utility model;

[0019] Among them: 11, first green LED;12, second green LED;21, first red LED;22, second red LED. DETAILED DESCRIPTION

[0020] The utility model makes further description to the practical new type in combination with the following embodiment.

[0021] From Figure 1 It can be known that the air purifier warning circuit described in the embodiment comprises a control chip U41, a first lamp group, a second lamp group, a first switch module, a second switch module, a light sensing module and an air quality sensor U42;The control chip U41 is a single-chip microcomputer capable of outputting a PWM signal;

[0022] The control chip U41 is provided with a first output end, a second output end and a third output end;The first lamp group is connected with the first output end through the first switch module;The second lamp group is connected with the second output end through the second switch module;The air quality sensor U42 is connected with the third output end;The control chip U41 controls the brightness of the first lamp group and the second lamp group through the light sensing module.

[0023] Specifically, the air purifier warning circuit described in the embodiment, when the air quality of the environment is normal, the control chip U41 controls the first switch module to be turned on, so that the light sensing module can control the brightness of the first lamp group according to the ambient brightness;When the air quality of the environment is poor, the control chip U41 controls the second switch module to be turned on, so that the light sensing module can control the brightness of the second lamp group according to the ambient brightness.

[0024] The first lamp group and the second lamp group can emit light according to the control quality of the environment, so as to remind the user, and the first lamp group and the second lamp group include a plurality of LEDs, which can be arranged at different positions, so as to facilitate the user to observe, and the plurality of LEDs can also be arranged in a specific shape, further facilitating the user to observe; secondly, the light sensing module can change the brightness of the lamp group to ensure the comfortable brightness under different ambient light intensities.

[0025] The light sensing module includes a photoresistor RA, a resistor R40, a resistor R45, and a triode Q41; the control chip U41 is provided with a PWM end and a collection end; one end of the photoresistor RA is grounded; the other end of the photoresistor RA is connected with the collection end; the other end of the photoresistor RA is externally connected with a power supply through the resistor R45; the PWM end is connected with the base of the triode Q41 through the resistor R40; the emitter of the triode Q41 is externally connected with a power supply; and the collector of the triode Q41 is connected with one end of the first lamp group and one end of the second lamp group respectively.

[0026] Specifically, the photoresistor RA can change the resistance value according to the ambient brightness, and the voltage division is realized through the resistor R45, so that the control chip U41 can judge the ambient brightness by collecting the resistance value of the photoresistor RA, and output different duty cycle PWM to control the on-off of the triode Q41, so that the first lamp group and the second lamp group can emit light with different brightness according to the ambient brightness.

[0027] The first switch module includes a triode Q42, a resistor R46, and a resistor R47; the first output end is connected with the base of the triode Q42 through the resistor R46; the base of the triode Q42 is grounded through the resistor R47; the emitter of the triode Q42 is grounded; and the collector of the triode Q42 is connected with the other end of the first lamp group.

[0028] Specifically, when the air quality of the environment is normal, the first output end of the control chip U41 outputs a high level, so that the triode Q42 is turned on, at this time, the power supply, the triode Q41, the first lamp group, the triode Q42, and the ground form a loop, and the first lamp group emits light.

[0029] The first lamp group of the air purifier warning circuit comprises a resistor R42, a resistor R44, a plurality of first green LEDs 11 and a plurality of second green LEDs 12; the resistor R42 and the plurality of first green LEDs 11 are connected in series and then arranged between the collector of a triode Q42 and the collector of a triode Q41; the resistor R44 and the plurality of second green LEDs 12 are connected in series and then arranged between the collector of the triode Q42 and the collector of the triode Q41. The resistor R42 and the resistor R44 serve to limit current and protect the first green LEDs 11 and the second green LEDs 12; the two groups of green LEDs arranged in parallel can work normally when one group of green LEDs fails.

[0030] The second switch module of the air purifier warning circuit comprises a triode Q43, a resistor R48 and a resistor R49; the second output end is connected with the base of the triode Q43 through the resistor R48; the base of the triode Q43 is grounded through the resistor R49; the emitter of the triode Q43 is grounded; and the collector of the triode Q43 is connected with the other end of the second lamp group.

[0031] Specifically, when the air quality of the environment is normal, the second output end of the control chip U41 outputs a high level, so that the triode Q43 is turned on, at this time, the power supply, the triode Q41, the first lamp group, the triode Q43 and the ground form a loop, and the second lamp group emits light.

[0032] The second lamp group of the air purifier warning circuit comprises a resistor R41, a resistor R43, a plurality of first red LEDs 21 and a plurality of second red LEDs 22; the resistor R41 and the plurality of first red LEDs 21 are connected in series and then arranged between the collector of a triode Q43 and the collector of a triode Q41; the resistor R43 and the plurality of second red LEDs 22 are connected in series and then arranged between the collector of the triode Q43 and the collector of the triode Q41. The resistor R41 and the resistor R43 serve to limit current and protect the first red LEDs 21 and the second red LEDs 22; the two groups of red LEDs arranged in parallel can work normally when one group of red LEDs fails.

[0033] The triode Q41 of the air purifier warning circuit is a PNP triode. The triode Q42 of the air purifier warning circuit is a PNP triode. The triode Q43 of the air purifier warning circuit is a PNP triode. The PNP triode has a small volume and is suitable for integrated circuits and micro applications.

[0034] It should be explained finally that the above embodiment is only used to illustrate the technical scheme of the utility model, and is not the limit of the protection scope of the utility model, although the utility model is explained in detail with reference to the preferred embodiment, the ordinary skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently, and does not deviate from the essence and scope of the technical scheme of the utility model.

Claims

1. An air cleaner warning circuit, comprising: The control chip U41, the first lamp group, the second lamp group, the first switch module, the second switch module, the light sensing module and the air quality sensor U42 are included. The control chip U41 is provided with a first output end, a second output end and a third output end; the first lamp group is connected with the first output end through the first switch module; the second lamp group is connected with the second output end through the second switch module; the air quality sensor U42 is connected with the third output end; the control chip U41 controls the brightness of the first lamp group and the second lamp group through the light sensing module.

2. The air cleaner warning circuit of claim 1 wherein: The light sensing module includes a photoresistor RA, a resistor R40, a resistor R45 and a triode Q41; the control chip U41 is provided with a PWM end and a collection end; one end of the photoresistor RA is grounded; the other end of the photoresistor RA is connected with the collection end; the other end of the photoresistor RA is connected with an external power supply through the resistor R45; the PWM end is connected with the base of the triode Q41 through the resistor R40; the emitter of the triode Q41 is connected with an external power supply; the collector of the triode Q41 is connected with one end of the first lamp group and one end of the second lamp group respectively.

3. The air cleaner warning circuit of claim 2 wherein: The first switch module includes a triode Q42, a resistor R46 and a resistor R47; the first output end is connected with the base of the triode Q42 through the resistor R46; the base of the triode Q42 is grounded through the resistor R47; the emitter of the triode Q42 is grounded; the collector of the triode Q42 is connected with the other end of the first lamp group.

4. The air cleaner warning circuit of claim 3 wherein: The first lamp group includes a resistor R42, a resistor R44, a plurality of first green LEDs and a plurality of second green LEDs; the resistor R42 and the plurality of first green LEDs are connected in series and arranged between the collector of the triode Q42 and the collector of the triode Q41; the resistor R44 and the plurality of second green LEDs are connected in series and arranged between the collector of the triode Q42 and the collector of the triode Q41.

5. The air cleaner warning circuit of claim 2 wherein: The second switch module includes a triode Q43, a resistor R48 and a resistor R49; the second output end is connected with the base of the triode Q43 through the resistor R48; the base of the triode Q43 is grounded through the resistor R49; the emitter of the triode Q43 is grounded; the collector of the triode Q43 is connected with the other end of the second lamp group.

6. The air cleaner warning circuit of claim 5 wherein: The second lamp group includes a resistor R41, a resistor R43, a plurality of first red LEDs and a plurality of second red LEDs; the resistor R41 and the plurality of first red LEDs are connected in series and arranged between the collector of the triode Q43 and the collector of the triode Q41; the resistor R43 and the plurality of second red LEDs are connected in series and arranged between the collector of the triode Q43 and the collector of the triode Q41.

7. The air cleaner warning circuit of claim 2 wherein: The triode Q41 is a PNP triode.

8. The air cleaner warning circuit of claim 3 wherein: The triode Q42 is a PNP triode.

9. The air cleaner warning circuit of claim 5 wherein: The triode Q43 is a PNP triode.

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