Air treatment device and display circuit

Abstract

This utility model discloses an air handling device and a display circuit, relating to the field of display control. The air handling device includes a first light-emitting element, a second light-emitting element, and a processor. The first light-emitting element is used to emit light when the air handling device is powered on, and the air handling device is used to display a first message when the first light-emitting element emits light. The processor is connected to the second light-emitting element and is used to control the second light-emitting element to emit light according to interactive information. When the first light-emitting element and the second light-emitting element emit light simultaneously, the air handling device is used to display a second message.

Description

Technical Field

[0001] This utility model relates to the field of display control technology, and in particular to an air handling device and display circuit. Background Technology

[0002] Air purifiers include buttons for user input of function requests; when a button is pressed, it's assumed the user needs to activate the corresponding function. To enhance user interaction, each button has a corresponding individual LED (Light-Emitting Diode). These LEDs are connected to a high-performance controller, such as a high-performance Microcontroller Unit (MCU), which uses a complex PWM dimming algorithm to control the LED's brightness. However, this approach suffers from high hardware costs and complex LED brightness control. Utility Model Content

[0003] In view of this, the present invention provides an air treatment device and display circuit that is simple, reliable and easy to implement, and helps to reduce costs while ensuring basic functions.

[0004] To solve the above-mentioned technical problems, this application provides an air handling device, comprising:

[0005] A first light-emitting element is used to emit light when the air handling equipment is in the power-on state, and when the first light-emitting element emits light, the air handling equipment is used to display a first message;

[0006] Second light-emitting element;

[0007] The processor, connected to the second light-emitting element, is used to control the second light-emitting element to emit light according to the interaction information, and when the first light-emitting element and the second light-emitting element emit light simultaneously, the air handling device is used to provide a second message.

[0008] In one possible implementation, the air handling device further includes N buttons, where N is an integer not less than 1;

[0009] The number of first light-emitting elements is N, the number of second light-emitting elements is N, the i-th first light-emitting element and the i-th second light-emitting element correspond to the i-th button, 1≤i≤N and i is an integer;

[0010] The processor is also connected to the button, and the processor is specifically used to control the i-th second light-emitting element to light up when the i-th button is triggered, and to control the i-th second light-emitting element not to light up when the i-th button is not triggered.

[0011] In one possible implementation, the N buttons include a power button and M function buttons, where M is an integer not less than 1;

[0012] The first light-emitting element corresponding to the power button is used to emit light when the air handling equipment is powered on; the first light-emitting element corresponding to the function button is used to not emit light when the air handling equipment is powered on and to emit light when the air handling equipment is powered on, wherein the power button is used to switch the air handling equipment to the powered-on state.

[0013] In one possible implementation, the air handling device further includes a display panel;

[0014] The display panel is designed to be light-transmitting when the air handling equipment is powered on and light-blocking when the air handling equipment is powered off.

[0015] In one possible implementation, the display panel includes a dual-state optical film.

[0016] To address the aforementioned technical problems, this application also provides a display circuit applied to an air handling device. The air handling device includes P function buttons, where P is an integer not less than 1. The display circuit includes a processor, a controllable switch module, and P groups of first light-emitting modules. The processor is connected to the P function buttons, and the j-th group of first light-emitting modules corresponds to the j-th function button. The j-th group of first light-emitting modules includes a third light-emitting element and a fourth light-emitting element, where 1 ≤ j ≤ P and j is an integer.

[0017] The first end of the third light-emitting element is used to connect to the power supply, and the second end is connected to the first end of the controllable switch module.

[0018] The second terminal of the controllable switch module is grounded, and the control terminal is connected to the processor. It is used to turn on when the air handling equipment is in the power-on state and turn off when the air handling equipment is in the power-off state.

[0019] The first end of the fourth light-emitting element is connected to the processor, and the second end is grounded; the j-th fourth light-emitting element is used to emit light when the j-th function key is triggered, and not to emit light when the j-th function key is not triggered.

[0020] In one possible implementation, the j-th group of first light-emitting modules further includes a first resistor connected in series with the third light-emitting element and a second resistor connected in series with the fourth light-emitting element.

[0021] In one possible implementation, the third light-emitting element is a first LED, the fourth light-emitting element is a second LED, and the luminous brightness of the first LED when it emits light is less than that of the second LED when it emits light.

[0022] In one possible implementation, the controllable switch module includes a third resistor and a controllable switch;

[0023] The first end of the controllable switch serves as the first end of the controllable switch module, the second end is connected to one end of the third resistor and the common terminal of the connection serves as the second end of the controllable switch module, and the control end is connected to the other end of the third resistor and serves as the control end of the controllable switch module.

[0024] In one possible implementation, the display circuit further includes a second light-emitting module corresponding to the power button of the air handling equipment, the second light-emitting module including a fifth light-emitting element and a sixth light-emitting element;

[0025] The power button is connected to the processor;

[0026] The first end of the fifth light-emitting element is used to connect to the power supply, and the second end is grounded, and it is used to emit light when the air handling equipment is powered on.

[0027] The first end of the sixth light-emitting element is connected to the processor, and the second end is grounded. It is used to emit light when the power button is triggered and not emit light when the power button is not triggered.

[0028] The controllable switch module is also used to turn off when the air handling equipment is in the powered-on state.

[0029] The beneficial effects of this application are as follows:

[0030] This application provides an air handling device and a display circuit. The air handling device includes a first light-emitting element, a second light-emitting element, and a processor. The first light-emitting element emits light when the air handling device is powered on, and when the first light-emitting element emits light, the air handling device displays a first message. The processor controls the second light-emitting element to emit light based on interactive information, and when the first and second light-emitting elements emit light simultaneously, the air handling device displays a second message. As can be seen, this solution is simple, reliable, and easy to implement. It can easily and reliably control the illumination of the first and second light-emitting elements, thereby achieving different prompts. While ensuring basic functionality, it is more conducive to cost reduction and practical application.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0033] Figure 1 A schematic diagram of the structure of an air handling device provided by this utility model;

[0034] Figure 2 A schematic diagram of a display circuit provided by this utility model;

[0035] Figure 3 An overvoltage detection circuit is provided for this utility model;

[0036] Figure 4 A schematic diagram of another display circuit provided by this utility model;

[0037] Figure 5 A schematic diagram of another display circuit provided by this utility model. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0039] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0040] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of an air handling device provided by the present invention.

[0041] The air handling unit includes:

[0042] The first light-emitting element is used to emit light when the air handling equipment is in the powered-on state, and when the first light-emitting element emits light, the air handling equipment is used to indicate a first message; in some optional embodiments, the first light-emitting element can be used to keep emitting light when the air handling equipment is in the powered-on state.

[0043] Second light-emitting element;

[0044] The processor 2 is connected to the second light-emitting element and is used to control the second light-emitting element to emit light according to the interactive information. When the first light-emitting element and the second light-emitting element emit light at the same time, the air handling device is used to provide the second information.

[0045] Specifically, the air handling device includes, but is not limited to, an air purifier. The connection between the processor 2 and the second light-emitting element can be an electrical connection, and the number of bits of the processor 2 is less than a threshold to facilitate the selection of a low-performance processor 2. For example, the processor 2 in this application can be a 51 microcontroller, which has a processing bit of 8 bits and is low in cost, without the need to use a high-performance, high-cost MCU, such as a processor 2 with a processing bit of 32 bits. Of course, the processor 2 can also be a low-performance MCU, such as an 8-bit MCU, without any particular limitation here.

[0046] When the air handling unit is turned on, the first light-emitting element illuminates to indicate a first message. In some optional embodiments, the first light-emitting element may remain illuminated after the air handling unit is turned on, thus indicating the first message. For example, the air handling unit may include N buttons, and the i-th first light-emitting element may correspond to the i-th button of the air handling unit. The first message may indicate that the air handling unit is turned on and in a powered-on state by illuminating the first light-emitting element, and this illumination may also indicate the location of the corresponding button so that the user knows which location to trigger. The i-th second light-emitting element may correspond to the i-th button of the air handling unit. When interactive information is generated, the processor 2 controls the corresponding second light-emitting element to illuminate. At this time, the first and second light-emitting elements pointing to the same button illuminate simultaneously, so that the air handling unit indicates a second message, that is, through this simultaneous illumination, it indicates which button was triggered. It is understood that the interactive information can be the user's interaction with the air handling equipment, such as the user pressing, touching, tapping, or sliding the button positions of the air handling equipment, or the interactive information can be the user's interaction with a terminal device, which is wirelessly or wiredly connected to the air handling equipment.

[0047] In summary, this application provides an air handling device. This solution is simple, reliable, and easy to implement. It can easily and reliably control the light emission of the first and second light-emitting elements, thereby providing different prompts. While ensuring basic functions, it is more conducive to reducing costs and practical applications.

[0048] Furthermore, the air handling unit also includes N buttons, where N is an integer not less than 1;

[0049] The number of first light-emitting elements is N, the number of second light-emitting elements is N, the i-th first light-emitting element and the i-th second light-emitting element correspond to the i-th button, 1≤i≤N and i is an integer;

[0050] The processor 2 is also connected to the button. Specifically, the processor 2 is used to control the i-th second light-emitting element to light up when the i-th button is triggered, and to control the i-th second light-emitting element not to light up when the i-th button is not triggered.

[0051] Specifically, the button triggering method described here can be touch triggering or press triggering, without any particular limitation. When the air handling unit is powered on, the first light-emitting element illuminates, presenting a dim display effect to indicate to the user that the air handling unit is powered on and to indicate the location of the corresponding button, so that the user knows which position to trigger to activate the corresponding button, facilitating subsequent on-demand activation. The i-th first light-emitting element and the i-th second light-emitting element correspond to the i-th button. When the user triggers the i-th button, the i-th first light-emitting element and the i-th second light-emitting element corresponding to the i-th button illuminate simultaneously, presenting a bright display effect to indicate to the user that the button has been triggered.

[0052] Furthermore, the N buttons include a power button 11 and M function buttons 12, where M is an integer not less than 1;

[0053] The first light-emitting element 31 corresponding to the power button 11 illuminates when the air handling unit is powered on. In some optional embodiments, the first light-emitting element 31 corresponding to the power button 11 remains illuminated when the air handling unit is powered on. The first light-emitting element 32 corresponding to the function button 12 does not illuminate when the air handling unit is powered on but illuminates when the air handling unit is powered on. It can be understood that the power-on state refers to the air handling unit being powered on and in a ready state for normal operation. The power-on state refers to the state where the power button 11 of the air handling unit is turned on, causing the air handling unit to enter the working state, which will not be elaborated further below.

[0054] Specifically, the function button 12 here includes, but is not limited to, a fan speed adjustment button, a mode switching button, etc.; when the air handling unit is connected to a power source, it can be considered to be in a powered-on state. At this time, the first light-emitting element 31 corresponding to the power button 11 illuminates (in some optional embodiments, the first light-emitting element 31 corresponding to the power button 11 can remain illuminated), while the first light-emitting element 32 corresponding to the function button 12 does not illuminate. Of course, at this time, the second light-emitting element 41 corresponding to the power button 11 and the second light-emitting element 42 corresponding to the function button 12 do not illuminate. When the power button 11 is triggered, the air handling unit is in a powered-on state. The second light-emitting element 41 corresponding to the power button 11 illuminates, and the first light-emitting element 32 corresponding to the function button 12 illuminates. When the function button 12 is triggered, the corresponding second light-emitting element 42 illuminates. Figure 1 As shown, taking M=1 as an example, the above settings are illustrated. The correspondence between the power button 11 and its corresponding first light-emitting element 31 is represented by a dashed line, and the correspondence between the function button 12 and its corresponding first light-emitting element 32 is also represented by a dashed line.

[0055] In the above embodiments, by having the first light-emitting element 31 corresponding to the power button 11 keep illuminating when the air handling unit is powered on, the position of the power button 11 can be displayed after the air handling unit is powered on, making it easier for the user to locate the power button 11 and perform corresponding operations. By having the first light-emitting element 32 corresponding to the function button 12 not illuminate when the air handling unit is powered on but illuminate when the air handling unit is powered on, the position of the power button 11 can be displayed when the air handling unit is powered on, but the position of the function button 12 cannot be displayed. When the power button 11 is triggered, that is, when the air handling unit switches to the power-on state, the first light-emitting element of the function button 12 illuminates, allowing the user to locate the function button 12 when the air handling unit is powered on. Through the above settings, it is beneficial to save energy while facilitating the user to locate the power button 11 and the function button 12 and adjust the status and function of the air handling unit according to the buttons.

[0056] Furthermore, the air handling equipment also includes a display panel;

[0057] The display panel is designed to be light-transmitting when the air handling unit is powered on and opaque when the air handling unit is powered off.

[0058] Specifically, when the air handling unit is not connected to a power source, it is in a powered-off state. At this time, the display panel is opaque, meaning it cannot display anything. This helps to immediately eliminate afterimages on a dark screen, presenting a color and texture consistent with the unit's casing, enhancing the overall simplicity of the unit, and preventing unnecessary light from affecting the user's rest or concentration. When the air handling unit is powered on, it is translucent, which helps to clearly display the illumination status of the first and second light-emitting elements, providing clear indication of the location of subsequent button presses and whether the buttons have been triggered.

[0059] Furthermore, the display panel includes a dual-state optical film.

[0060] It should be noted that the dual-state optical film has advantages such as being thin, flexible, adaptable, easy to integrate, fast switching response, and stable state. It is conducive to reliably achieving light transmission when the air handling equipment is powered on and light blocking when the air handling equipment is powered off. Specifically, the display panel may include a display panel body and a dual-state optical film. The display panel body is the outer shell panel, and the display panel body is covered with the dual-state optical film. That is, the dual-state optical film is superimposed on the side closer to the first light-emitting element and the second light-emitting element to form a hierarchical structure of display panel body - dual-state optical film - first light-emitting element and second light-emitting element.

[0061] Please refer to Figure 2 , Figure 2 This is a schematic diagram of a display circuit provided by the present invention.

[0062] The display circuit is applied to an air handling device, which includes P function buttons 12, where P is an integer not less than 1; the display circuit includes a processor 2, a controllable switch module 5, and P groups of first light-emitting modules. The processor 2 is connected to the P function buttons 12, and the j-th group of first light-emitting modules corresponds to the j-th function button 12 and the j-th group of first light-emitting modules includes a third light-emitting element 61 and a fourth light-emitting element 62, where 1≤j≤P and j is an integer;

[0063] The first end of the third light-emitting element 61 is used to connect to the power supply VCC, and the second end is connected to the first end of the controllable switch module 5.

[0064] The second terminal of the controllable switch module 5 is grounded, and the control terminal is connected to the processor 2. It is used to turn on when the air handling equipment is in the on state and turn off when the air handling equipment is in the off state.

[0065] The first end of the fourth light-emitting element 62 is connected to the processor 2, and the second end is grounded; the j-th fourth light-emitting element 62 is used to emit light when the j-th function button 12 is triggered, and not to emit light when the j-th function button 12 is not triggered.

[0066] Specifically, processor 2 can be an additional processor with a processing bit depth less than the threshold, or it can reuse the processor in the air handling unit; no special limitation is made here. Function button 12 here includes, but is not limited to, fan speed adjustment button, mode switching button, etc., and the triggering method of function button 12 can be touch triggering or press triggering; no special limitation is made here.

[0067] Processor 2 is connected to P function buttons 12 ( Figure 2 (Taking P=1 as an example) When any function button 12 is triggered, the system can detect the situation and control the corresponding fourth light-emitting element 62 to emit light. The second end of the fourth light-emitting element 62 can be directly grounded, or the second end of the fourth light-emitting element 62 can be connected to the grounding terminal of the processor 2 and the common terminal of the connection can be grounded. The configuration can be flexibly set in actual applications.

[0068] To elaborate, the power supply VCC here is a DC power supply (which can be obtained by converting the AC power supplied to the air handling unit through the power module). When the air handling unit is turned on, the processor 2 outputs a first control signal to control the controllable switch module 5 to conduct. According to the circuit structure, the third light-emitting element 61 is energized and illuminates, thereby indicating the trigger position of the function button 12. When the air handling unit is turned off, the processor 2 stops outputting the first control signal, causing the controllable switch module 5 to turn off.

[0069] After the air handling unit is turned on, function button 12 may be triggered as needed. When the j-th function button 12 is triggered, processor 2 outputs a first level to control the corresponding fourth light-emitting element 62 to emit light. This first level is high. According to the circuit structure, for the j-th group of first light-emitting modules, the third light-emitting element 61 and the fourth light-emitting element 62 emit light simultaneously, resulting in higher overall brightness, thus indicating that the j-th function button 12 has been triggered. When the j-th function button 12 is not triggered, processor 2 outputs a second level to control the corresponding fourth light-emitting element 62 to not emit light. This second level is low.

[0070] The processor 2 includes a status register, which can maintain the state of the fourth light-emitting element 62 corresponding to the function button 12. For example, for the i-th fourth light-emitting element 62, when its corresponding i-th function button 12 is not triggered, the corresponding data bit in the status register can be 0, and the processor 2 maintains the output of the second level according to the data bit; when its corresponding i-th function button 12 is triggered, its corresponding data bit in the status register can be 1, and the processor 2 maintains the output of the first level according to the data bit. It can be seen that in this way, each time the trigger state of the i-th function button 12 changes, only the status register needs to be changed once to maintain the current data bit state, so that the light-emitting state of the i-th fourth light-emitting element 62 changes accordingly and is maintained, without the need for frequent IO operations (Input Output), which helps to reduce power consumption.

[0071] The processor 2 has a processing bit width less than the threshold, which facilitates the selection of a low-performance processor. For example, the processor 2 in this application can be a 51 microcontroller. The 51 microcontroller has a processing bit width of 8 bits, which has the characteristics of low power consumption and low cost. It can reliably realize the control function of the processor 2 in this application. It is understood that in actual applications, the control terminal of the controllable switch module 5 can occupy one GPIO port (General-Purpose Input Output) of the 51 microcontroller, and the first terminals of the P fourth light-emitting elements 62 occupy a total of P IO ports of the 51 microcontroller. Of course, the processor 2 can also be a low-performance MCU, such as an 8-bit MCU, without any special limitation here. The third light-emitting element 61 can be the first LEDD1, and the fourth light-emitting element 62 can be the second LEDD2. Thus, the display function can be realized simply and reliably through the structure of dual LEDs plus the 51 microcontroller. It is also low in cost, simple to control, and conducive to practical applications.

[0072] Furthermore, considering that the power supply output voltage for the air handling unit may be overvoltage, or the power supply VCC output voltage for the third light-emitting element 61 may also be overvoltage, please refer to [the relevant regulations] to avoid damage to the devices due to overvoltage. Figure 3 , Figure 3This invention provides an overvoltage detection circuit, wherein V-IN is the input voltage access point to be detected, and the voltage to be detected is input through this input voltage access point V-IN; V-OUT is the voltage output point connected to each power module. Here, the voltage to be detected needs to be a DC voltage. An adjustable voltage regulator U1 with an accuracy of 1% is used as the input voltage acquisition. When the input voltage accessed through the input voltage access point V-IN is less than the overvoltage threshold, the voltage at the output terminal of the adjustable voltage regulator U1 approaches the input voltage, and the switch module 7 connected to the output terminal of the adjustable voltage regulator U1 is in a conducting state under the action of the input voltage, and each power module connected to the voltage output point V-OUT can be powered normally. When the input voltage is not less than the overvoltage threshold, the voltage at the output terminal of the adjustable voltage regulator U1 approaches 0V, and the switch module 7 connected to the output terminal of the adjustable voltage regulator U1 is in a turning-off state under the action of the adjustable voltage regulator output terminal, avoiding damage and fire risk to the power modules connected to the voltage output point V-OUT.

[0073] Specifically, such as Figure 3 As shown, the switching module 7 may include a fifth resistor R5, a sixth resistor R6, a transistor Q1, a seventh resistor R7, a MOSFET Q2 (Metal-Oxide-Semiconductor Field-Effect Transistor), and an eleventh resistor R11. The overvoltage detection circuit also includes an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and an adjustable voltage regulator U1. For specific connection details, see [link to details]. Figure 3 As shown, details are omitted here. Based on this circuit, MOSFET Q2 is turned off when the input voltage is not less than the overvoltage threshold to stop supplying power to subsequent power modules; it is turned on when the input voltage is less than the overvoltage threshold to supply power to subsequent power modules. For example, taking an overvoltage threshold of 26.9V, an adjustable regulator U1 with an accuracy of ±1%, and a reference voltage of 2.5V as an example, when the input voltage reaches the overvoltage threshold, the voltage at the reference terminal of the adjustable regulator U1 reaches its reference voltage, the adjustable regulator U1 outputs a low level, then transistor Q1 turns on, pulling up the voltage at the gate of MOSFET Q2, and MOSFET Q2 turns off.

[0074] In addition, to ensure more reliable operation of the overvoltage detection circuit, the overvoltage detection circuit may also include a first Zener diode DZ1 and a second Zener diode DZ2 for voltage regulation, and a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6 for filtering. The specific connection method is as follows: Figure 3As shown, details will not be elaborated here. It is evident that, compared to circuits using TVS diodes for overvoltage detection, the overvoltage detection circuit presented in this application offers higher detection accuracy, which is beneficial for ensuring the reliable operation of the display circuit and air handling equipment.

[0075] In summary, this application provides a display circuit that is simple, reliable, and easy to implement. It can easily and reliably control the light emission of the third light-emitting element 61 and the fourth light-emitting element 62 to provide different prompts. While ensuring basic functions, it is more conducive to reducing costs and practical applications.

[0076] Furthermore, the first light-emitting module of the j-th group also includes a first resistor R1 connected in series with the third light-emitting element 61, and a second resistor R2 connected in series with the fourth light-emitting element 62.

[0077] It should be noted that the first resistor R1 is used for current limiting to prevent excessive current flowing through the corresponding branch from damaging the components. The value of the first resistor R1 is not specifically limited here; it can be selected flexibly according to actual needs. Please refer to... Figure 4 , Figure 4 This is a schematic diagram of another display circuit provided by this utility model, with P=7 as an example.

[0078] The second resistor R2 is used for current limiting to prevent excessive current flowing through the corresponding branch from damaging the components. The value of the second resistor R2 is not specifically limited here; it can be selected flexibly according to actual needs. Please refer to... Figure 5 , Figure 5 This is a schematic diagram of another display circuit provided by this utility model. Here, we will still use P=7 as an example for illustration.

[0079] Furthermore, the third light-emitting element 61 is the first LEDD1, the fourth light-emitting element 62 is the second LEDD2, and the luminous brightness of the first LEDD1 when it emits light is less than the luminous brightness of the second LEDD2 when it emits light.

[0080] Specifically, based on the advantages of LEDs such as high efficiency, energy saving, environmental protection, and long service life, the third light-emitting element 61 is set as the first LEDD1, and the fourth light-emitting element 62 is set as the second LEDD2. More specifically, the anode of the first LEDD1 serves as the first end of the third light-emitting element 61, and the cathode of the first LEDD1 serves as the second end of the third light-emitting element 61, such as... Figure 4 As shown; the anode of the second LEDD2 serves as the first end of the fourth light-emitting element 62, and the cathode of the second LEDD2 serves as the second end of the fourth light-emitting element 62, as... Figure 5 As shown.

[0081] Since LEDs have different luminous brightness, their internal structures are different, and the lower the luminous brightness, the lower the cost. By setting the luminous brightness of the first LEDD1 and the second LEDD2 as described above, it is beneficial to further reduce costs and improve the display effect.

[0082] Furthermore, the controllable switch module 5 includes a third resistor R3 and a controllable switch;

[0083] The first end of the controllable switch serves as the first end of the controllable switch module 5. The second end is connected to one end of the third resistor R3, and the common terminal of the connection serves as the second end of the controllable switch module 5. The control end is connected to the other end of the third resistor R3, and the connection serves as the control end of the controllable switch module 5.

[0084] It should be noted that the controllable switches mentioned here include, but are not limited to, those that are... Figure 4 The NPN transistor Q3 shown here has its base serving as the control terminal of the controllable switch, its collector serving as the first terminal of the controllable switch, and its emitter serving as the second terminal of the controllable switch. This implementation is simple and reliable. In addition, the value of the third resistor R3 is not particularly limited here and can be flexibly selected according to actual needs.

[0085] Furthermore, the controllable switch module 5 may also include a fourth resistor R4; one end of the fourth resistor R4 is connected to the control terminal of the controllable switch, and the other end is connected to the processor 2.

[0086] It should be noted that the fourth resistor R4 is used for current limiting to prevent excessive current flowing through the corresponding branch from damaging the device. There is no special limitation on the resistance value of the fourth resistor R4; it can be selected flexibly according to actual needs.

[0087] Furthermore, the display circuit also includes a second light-emitting module corresponding to the power button of the air handling equipment. The second light-emitting module includes a fifth light-emitting element and a sixth light-emitting element.

[0088] The power button is connected to processor 2;

[0089] The first end of the fifth light-emitting element is used to connect to the power supply VCC, and the second end is grounded, so as to keep the light emitting when the air handling equipment is powered on.

[0090] The first end of the sixth light-emitting element is connected to the processor 2, and the second end is grounded. It is used to emit light when the power button is triggered and not emit light when the power button is not triggered.

[0091] The controllable switch module 5 is also used to shut off the air handling equipment when it is powered on.

[0092] It should be noted that the above settings allow the fifth light-emitting element to remain lit when the air handling unit is powered on, while the controllable switch module 5 is turned off. In this case, the third light-emitting element 61 corresponding to function button 12 does not light up. Similarly, the sixth light-emitting element corresponding to the power button and the fourth light-emitting element 62 corresponding to function button 12 also do not light up at this time. When the power button is triggered, the air handling unit is powered on, the sixth light-emitting element remains lit, the controllable switch module 5 is turned on, and according to the circuit structure, the third light-emitting element 61 corresponding to function button 12 remains lit. Furthermore, when the j-th function button 12 is triggered, the corresponding fourth light-emitting element 62 lights up. Therefore, the above settings are beneficial for energy saving.

[0093] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

[0095] It should also be noted that, in this specification, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion; the above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air handling device, characterized in that, include: A first light-emitting element is used to emit light when the air handling equipment is in the power-on state, and when the first light-emitting element emits light, the air handling equipment is used to display a first message; Second light-emitting element; The processor, connected to the second light-emitting element, is used to control the second light-emitting element to emit light according to the interaction information, and when the first light-emitting element and the second light-emitting element emit light simultaneously, the air handling device is used to provide a second message.

2. The air handling equipment as described in claim 1, characterized in that, The air handling equipment also includes N buttons, where N is an integer not less than 1; The number of first light-emitting elements is N, the number of second light-emitting elements is N, the i-th first light-emitting element and the i-th second light-emitting element correspond to the i-th button, 1≤i≤N and i is an integer; The processor is also connected to the button, and the processor is specifically used to control the i-th second light-emitting element to light up when the i-th button is triggered, and to control the i-th second light-emitting element not to light up when the i-th button is not triggered.

3. The air handling equipment as described in claim 2, characterized in that, The N buttons include a power button and M function buttons, where M is an integer not less than 1; The first light-emitting element corresponding to the power button is used to emit light when the air handling equipment is powered on; The first light-emitting element corresponding to the function button is used to not emit light when the air handling device is in the power-on state and to emit light when the air handling device is in the power-on state, wherein the power-on button is used to switch the air handling device to the power-on state.

4. The air handling equipment as described in claim 2 or 3, characterized in that, The air handling equipment also includes a display panel; The display panel is designed to be light-transmitting when the air handling equipment is powered on and light-blocking when the air handling equipment is powered off.

5. The air handling equipment as described in claim 4, characterized in that, The display panel includes a dual-state optical film.

6. A display circuit, characterized in that, The invention is applied to an air handling device, which includes P function buttons, where P is an integer not less than 1; the display circuit includes a processor, a controllable switch module, and P groups of first light-emitting modules, wherein the processor is connected to the P function buttons, the j-th group of first light-emitting modules corresponds to the j-th function button, and the j-th group of first light-emitting modules includes a third light-emitting element and a fourth light-emitting element, where 1≤j≤P and j is an integer; The first end of the third light-emitting element is used to connect to the power supply, and the second end is connected to the first end of the controllable switch module. The second terminal of the controllable switch module is grounded, and the control terminal is connected to the processor. It is used to turn on when the air handling equipment is in the power-on state and turn off when the air handling equipment is in the power-off state. The first end of the fourth light-emitting element is connected to the processor, and the second end is grounded; the j-th fourth light-emitting element is used to emit light when the j-th function key is triggered, and not to emit light when the j-th function key is not triggered.

7. The display circuit as described in claim 6, characterized in that, The first light-emitting module of the j-th group also includes a first resistor connected in series with the third light-emitting element and a second resistor connected in series with the fourth light-emitting element.

8. The display circuit as described in claim 6, characterized in that, The third light-emitting element is a first LED, the fourth light-emitting element is a second LED, and the luminous brightness of the first LED when it emits light is less than that of the second LED when it emits light.

9. The display circuit as described in claim 6, characterized in that, The controllable switch module includes a third resistor and a controllable switch; The first end of the controllable switch serves as the first end of the controllable switch module, the second end is connected to one end of the third resistor and the common terminal of the connection serves as the second end of the controllable switch module, and the control end is connected to the other end of the third resistor and serves as the control end of the controllable switch module.

10. The display circuit according to any one of claims 6 to 9, characterized in that, The display circuit also includes a second light-emitting module corresponding to the power button of the air handling equipment, the second light-emitting module including a fifth light-emitting element and a sixth light-emitting element; The power button is connected to the processor; The first end of the fifth light-emitting element is used to connect to the power supply, and the second end is grounded, and it is used to emit light when the air handling equipment is powered on. The first end of the sixth light-emitting element is connected to the processor, and the second end is grounded. It is used to emit light when the power button is triggered and not emit light when the power button is not triggered. The controllable switch module is also used to turn off when the air handling equipment is in the powered-on state.

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