Display circuit of purification tuyere machine of central air conditioner

Abstract

The utility model provides a central air conditioner purification tuyere machine display circuit which comprises a main control module, a power module, a display module and an interface module, the main control module is connected with the power module, the display module and the interface module, and the power module is connected with the display module and the interface module. The main control module receives data transmitted by the interface module and controls the display module to display the data, the power supply module is used for providing low-voltage direct current for each module, the display module is used for displaying the data transmitted by the interface module, and the interface module is used for receiving data transmitted by an external sensor. According to the utility model, the temperature sensor and the harmful substance detection sensor are used for detecting data and transmitting the detection data to the control chip, and the control chip is used for transmitting the detection data to the digital screen through the latch for displaying, so that the circuit structure is simple, the operation is very easy, and the detected data can be effectively displayed on the digital screen; and the display stability of the tuyere machine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air outlet machines of central air conditioners, and particularly relates to a display circuit of an air outlet machine of a central air conditioner. BACKGROUND

[0002] With the improvement of people's living standards, more and more families choose to install central air conditioners. Ordinary central air conditioners only have the functions of refrigeration and heating, and are internally provided with a temperature detection function. The detected data is often displayed through a digital screen. However, the temperature detection and display cannot meet the current demand for more functions of central air conditioners, such as harmful substance detection and display.

[0003] The existing central air conditioners have single detection functions, and the displayed data is too chaotic. The data is not effectively distinguished, the change data cannot be intuitively obtained, and the existing demand cannot be met. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above problems, the present application provides a display circuit of an air outlet machine of a central air conditioner. The temperature sensor and the harmful substance detection sensor detect data, and transmit the detected data to a control chip. The control chip transmits the detected data to a digital screen through a latch for display. The circuit structure is simple, easy to operate, and can effectively display the detected data on the digital screen, thereby increasing the stability of the display of the air outlet machine.

[0005] The present application is achieved by the following technical solutions:

[0006] The present application provides a display circuit of an air outlet machine of a central air conditioner, which comprises a main control module, a power module, a display module and an interface module. The main control module is connected with the power module, the display module and the interface module. The power module is connected with the display module and the interface module.

[0007] The main control module receives data transmitted by the interface module and controls the display module to display the data.

[0008] The power module is used for providing low-voltage direct current for each module.

[0009] The display module is used for displaying data transmitted by the interface module.

[0010] The interface module is used for receiving data transmitted by an external sensor.

[0011] Further, the main control module comprises a control chip. The 40th pin of the control chip is connected with the power module. The 1st-12th and 13th-24th pins of the control chip are connected with the display module. The 25th-27th, 29th, 41st-43rd pins of the control chip are connected with the interface module.

[0012] Further, the model of the control chip is FM33LC045N.

[0013] Further, the power module comprises a step-down chip, a second pin of the step-down chip is connected with the voltage input terminal through a filter protection circuit, a sixth pin of the step-down chip is an output pin, and the sixth pin of the step-down chip is grounded through a capacitor C8.

[0014] Further, the filter protection circuit comprises an inductor L1, a fuse, an inductor L2, an inductor L3 and a transient voltage suppression diode, one end of the inductor L1 is connected with the second pin of the step-down chip, the other end of the inductor L1 is connected with one end of the fuse, the end of the fuse away from the inductor L1 is connected with one end of the inductor L2 through a resistor R5, the end of the inductor L2 away from the resistor R5 is connected with the second pin of the voltage input terminal, the first pin of the voltage input terminal is grounded through the inductor L3, one end of the transient voltage suppression diode is connected with the first pin of the voltage input terminal, and the other end of the transient voltage suppression diode is connected with the second pin of the voltage input terminal.

[0015] Further, the display module comprises a latch U3, a latch U4, a latch U5, a digital screen connection terminal J3 and a digital screen connection terminal J4, the first-9th pin, the 11th pin and the control chip are connected, the 12th-19th pin of the latch U3 is connected with the digital screen connection terminal J3, the first-7th pin, the 11th pin and the control chip are connected, the 14th-17th pin of the latch U4 is connected with the digital screen connection terminal J4, the 18th pin, the 19th pin of the latch U4 is connected with the digital screen connection terminal J3, the first-7th pin, the 11th pin and the control chip are connected, the 14th-19th pin of the latch U5 is connected with the digital screen connection terminal J4, and the 20th pin of the latch U3, the latch U4 and the latch U5 is connected with the sixth pin of the step-down chip respectively.

[0016] Further, the interface module comprises a temperature detection submodule and a harmful substance detection submodule, and the temperature detection submodule and the harmful substance detection submodule are connected with the control chip respectively.

[0017] Further, the temperature detection submodule comprises a digital temperature sensor Q1, the first pin of the digital temperature sensor Q1 is grounded, the second pin of the digital temperature sensor Q1 is connected with the control chip, and the third pin of the digital temperature sensor Q1 is connected with the sixth pin of the step-down chip.

[0018] Further, the harmful substance detection sub-module comprises sensor connection terminals J5 and J7, the 2nd and 4th pins of the sensor connection terminal J5 are connected with the control chip, the 3rd pin of the sensor connection terminal J5 is connected with the 6th pin of the voltage reduction chip, the 2nd and 4th pins of the sensor connection terminal J7 are connected with the control chip, and the 3rd pin of the sensor J7 is connected with the 6th pin of the voltage reduction chip.

[0019] Further, the data uploading interface sub-module comprises an RS485 chip, a common-mode filter L4, an ESD static protection diode D2 and a data connection terminal J6, the 1st to 4th pins of the RS485 chip are connected with the control chip, the 8th pin of the RS485 chip is connected with the 6th pin of the voltage reduction chip, the 7th pin of the RS485 chip is connected with the 2nd pin of the common-mode filter L4 through a resistor R9, the 1st pin of the common-mode filter L4 is connected with the 2nd pin of the data connection terminal J6, the 6th pin of the RS485 chip is connected with the 3rd pin of the common-mode filter L4 through a resistor R10, the 4th pin of the common-mode filter L4 is connected with the 1st pin of the data connection terminal J6, and the ESD static protection diode D2 is connected in parallel between the common-mode filter L4 and the data connection terminal J6.

[0020] The beneficial effects of the present application are as follows: (1) the temperature sensor and the harmful substance detection sensor detect data, and the detected data is transmitted to the control chip; the detected data is transmitted to the digital screen through the control chip and the latch to be displayed; the circuit structure is simple and easy to operate; and the detected data can be effectively displayed on the digital screen, thereby increasing the stability of the display of the air outlet machine.

[0021] (2) the three latches transmit display data of different colors, so that the digital screen can display different colors according to the high and low changes of the data, thereby increasing the readability of the data.

[0022] (3) the external port for data transmission is additionally arranged, so that the data recognized by the sensor can be transmitted to the background server, thereby increasing the convenience of data transmission. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 it is the circuit principle drawing of the main control module of the utility model;

[0024] Figure 2 it is the circuit principle drawing of the power module of the utility model;

[0025] Figure 3 it is the circuit principle drawing of the display module of the utility model;

[0026] Figure 4 Circuit principle diagram of temperature detection sub-module of the utility model;

[0027] Figure 5 Circuit principle diagram of harmful substance detection sub-module of the utility model;

[0028] Figure 6 Circuit principle diagram of data uploading interface sub-module of the utility model;

[0029] Figure 7 Circuit principle diagram of editable circuit of the utility model. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0033] Please refer to Figures 1 to 7The application provides a central air conditioner purifying air outlet machine display circuit, which comprises a main control module, a power module, a display module and an interface module, the main control module is connected with the power module, the display module and the interface module respectively, the power module is connected with the display module and the interface module respectively, the main control module receives data transmitted by the interface module and controls the display module to display the data, the power module is used for providing low-voltage direct current for each module, the display module is used for displaying data transmitted by the interface module, and the interface module is used for receiving data transmitted by an external sensor.

[0034] As shown in Figure 2 , the power module comprises a step-down chip, the model of the step-down chip is WRB2405S-3WR2, the first pin of the step-down chip is grounded, the second pin of the step-down chip is connected with a fuse F1 through an inductor L1, one end of the fuse F1, which is away from the inductor L1, is connected with an inductor L2 through a resistor R5, one end of the inductor L2, which is away from the resistor R5, is connected with the second pin of a voltage input terminal J2, the second pin of the step-down chip is grounded through a capacitor C7, and a connection node between the inductor L1 and the fuse F1 is grounded through a capacitor C9. The first pin of the voltage input terminal J2 is grounded through an inductor L3, and a transient voltage suppression diode D1 is connected in parallel between the two pins of the voltage input terminal, so as to protect the circuit from instantaneous high voltage impact. The sixth pin of the step-down chip is an output pin, in the embodiment, the voltage input terminal inputs 24V voltage, the voltage output by the sixth pin of the step-down chip is 5V, and the sixth pin of the step-down chip is grounded through a capacitor C8. The step-down chip is used for reducing 24V direct current to 5V direct current, so as to provide stable direct current voltage for each module.

[0035] As shown in Figure 1 , Figure 3As shown, the master module includes a control chip, the model of the control chip is FM33LC045N, the 40th pin of the control chip is a voltage input end, connected with the 6th pin of the voltage reduction chip, to provide stable voltage for the control chip. The 1st-12th, 13th-24th pins of the control chip are connected with the display module, specifically, the display module includes latches U3, U4, U5, digital screen connection terminal J3 and digital screen connection terminal J4, the 1st pin of the three latches U3, U4 and U5 is connected with the 1st pin of the control chip, the 20th pin of the three latches U3, U4 and U5 is connected with the 6th pin of the voltage reduction chip, wherein the 20th pin of the latch U3 is grounded through the capacitor C12, the 20th pin of the latch U4 is grounded through the capacitor C10, and the 20th pin of the latch U5 is grounded through the capacitor C11. The 2nd-9th pins of the latch U3 are connected with the 17th-24th pins of the control chip one by one. The 11th pin of the latch U3 is connected with the 2nd pin of the control chip, and the 12th-19th pins of the latch U3 are connected with the 1st-8th pins of the digital screen connection terminal J3 one by one. The 2nd-7th pins of the latch U4 are connected with the 11th-16th pins of the control chip one by one, the 11th pin of the latch U4 is connected with the 3rd pin of the control chip, the 14th-17th pins of the latch U4 are connected with the 1st-4th pins of the digital screen connection terminal J4 one by one, and the 18th, 19th pins of the latch U4 are connected with the 10th, 9th pins of the digital screen connection terminal J3 one by one. The 2nd-7th pins of the latch U5 are connected with the 5th-10th pins of the control chip one by one, the 11th pin of the latch U5 is connected with the 4th pin of the control chip, and the 14th-19th pins of the latch U5 are connected with the 8th-9th, 7th-5th pins of the digital screen connection terminal J4 one by one. The three latches transmit control signals of three colors to the digital screens connected with the two digital screen connection terminals for display, the three colors are green, yellow and red, and the data high-low change is presented through the three colors.

[0036] The interface module includes a temperature detection sub-module and a harmful substance detection sub-module, which are connected with the control chip.

[0037] Specifically, as Figure 4As shown, the temperature detection sub-module includes a digital temperature sensor Q1, the model of the digital temperature sensor is DS18B20, the first pin of the digital temperature sensor Q1 is grounded, the second pin of the digital temperature sensor Q1 is connected with the 29th pin of the control chip, the second pin of the digital temperature sensor Q1 is connected with the 6th pin of the voltage reduction chip through the resistance R6, the third pin of the digital temperature sensor Q1 is connected with the 6th pin of the voltage reduction chip, and is grounded through the capacitor C16 and the capacitor C17 respectively. The temperature is detected by the digital temperature sensor Q1, the temperature data is transmitted to the control chip, and the control chip transmits the temperature data to the digital display screen through the latch for display.

[0038] As shown in Figure 5 The harmful substance detection sub-module includes sensor connection terminals J5 and J7, the first pin of the sensor connection terminal J5 is grounded, the second pin of the sensor connection terminal J5 is connected with the 27th pin of the control chip, the third pin of the sensor connection terminal J5 is connected with the 6th pin of the voltage reduction chip, and is grounded through the capacitor C13 and the capacitor C14 respectively, the fourth pin of the sensor connection terminal J5 is connected with the 25th pin of the control chip through the resistance R12, the fifth pin of the sensor connection terminal J5 is grounded through the resistance R7, the resistance value of the resistance R7 is 0, and the terminal can select a serial communication mode. The first pin of the sensor connection terminal J7 is grounded, the second pin of the sensor connection terminal J7 is connected with the 26th pin of the control chip, the third pin of the sensor connection terminal J7 is connected with the 6th pin of the voltage reduction chip, and the fourth pin of the sensor connection terminal J7 is connected with the 25th pin of the control chip. Different kinds of harmful substance detection sensors are connected through the two sensor connection terminals, such as carbon dioxide, PM2.5, VOC and other sensors, the sensors detect such substances, the sensors transmit data to the control chip, and the control chip transmits the data to the digital screen through the latch for display.

[0039] As shown in Figure 6As shown, the interface module also includes a data upload interface submodule, which includes an RS485 chip, a common-mode filter L4, an ESD protection diode D2, and a data connection terminal J6. Pin 1 of the RS485 chip is connected to pin 42 of the control chip, pins 2 and 3 of the RS485 chip are connected to pin 41 of the control chip, pin 4 of the RS485 chip is connected to pin 43 of the control chip, pin 5 of the RS485 chip is grounded, pin 6 of the RS485 chip is connected to pin 3 of the common-mode filter L4 through resistor R10, pin 4 of the common-mode filter L4 is connected to pin 1 of the data connection terminal J6, and the connection node between resistor R10 and the common-mode filter L4 is grounded through resistor R11. Pin 7 of the RS485 chip is connected to pin 2 of the common-mode filter L4 via resistor R9. Pin 1 of the common-mode filter L4 is connected to pin 2 of the data connection terminal J6. The node connecting resistor R9 and the common-mode filter L4 is connected to pin 6 of the step-down chip via resistor R8. The ESD protection diode D2 is connected in parallel between the common-mode filter L4 and the data connection terminal J6 to protect the RS-485 interface. Pin 8 of the RS485 chip is connected to pin 6 of the step-down chip and grounded via capacitors C15 and C18 respectively. Data can be uploaded to a server backend via the RS485 interface or transmitted via a WiFi module, expanding the circuit's functionality.

[0040] Among them, such as Figure 7 As shown, the system also includes an editable circuit, which comprises a resistor RN1 and an editing connection terminal J1. Pin 2 of resistor RN1 is connected to pin 47 of the control chip, which is grounded via capacitor C5 and simultaneously connected to pin 6 of the step-down chip via resistor R1. Pin 3 of resistor RN1 is connected to pin 46 of the control chip, pin 4 of resistor RN1 is connected to pin 45 of the control chip, pin 5 of resistor RN1 is connected to pin 3 of editing connection terminal J1 and connected to pin 6 of the step-down chip via resistor R3, pin 6 of resistor RN1 is connected to pin 4 of editing connection terminal J1 and connected to pin 6 of the step-down chip via resistor R4, and pin 7 of resistor RN1 is connected to pin 5 of editing connection terminal J1. Pin 1 of editing connection terminal J1 is connected to pin 6 of the step-down chip via resistor R2, and pin 2 of editing connection terminal J1 is grounded. The editable circuit allows for debugging or programming of the clock and data control of the control chip, facilitating the expansion of the control chip's functionality.

[0041] Of course, this application may have many other implementation methods. Based on this implementation method, other implementation methods obtained by those skilled in the art without any creative effort are all within the scope of protection of this application.

Claims

1. A display circuit for a central air conditioning clean air outlet machine, characterized by, It comprises a master control module, a power module, a display module and an interface module, the master control module is connected with the power module, the display module and the interface module respectively, the power module is connected with the display module and the interface module respectively; The master control module receives the data transmitted by the interface module and controls the display module to display the data; The power module is used for providing low-voltage direct current for each module; The display module is used for displaying the data transmitted by the interface module; The interface module is used for receiving the data transmitted by the external sensor.

2. The display circuit of the central air conditioning purification air outlet machine according to claim 1, characterized in that, The master control module comprises a control chip, the 40th pin of the control chip is connected with the power module, the 1st-12th and 13th-24th pins of the control chip are connected with the display module, and the 25th-27th, 29th and 41st-43rd pins of the control chip are connected with the interface module.

3. The display circuit of the central air conditioning purification air outlet machine according to claim 2, characterized in that, The model of the control chip is FM33LC045N.

4. The display circuit of the central air conditioning purification air outlet machine according to claim 3, characterized in that, The power module comprises a step-down chip, the 2nd pin of the step-down chip is connected with the voltage input terminal through a filter protection circuit, the 6th pin of the step-down chip is an output pin, and the 6th pin of the step-down chip is grounded through the capacitor C8.

5. The display circuit of the central air conditioning purification air outlet machine according to claim 4, characterized in that, The filter protection circuit comprises an inductor L1, a fuse, an inductor L2, an inductor L3 and a transient voltage suppression diode, one end of the inductor L1 is connected with the 2nd pin of the step-down chip, the other end of the inductor L1 is connected with one end of the fuse, the end of the fuse away from the inductor L1 is connected with one end of the inductor L2 through the resistor R5, the end of the inductor L2 away from the resistor R5 is connected with the 2nd pin of the voltage input terminal, the 1st pin of the voltage input terminal is grounded through the inductor L3, one end of the transient voltage suppression diode is connected with the 1st pin of the voltage input terminal, and the other end of the transient voltage suppression diode is connected with the 2nd pin of the voltage input terminal.

6. The display circuit of the central air conditioning purifier air outlet machine according to claim 4, characterized in that, The display module comprises a latch U3, a latch U4, a latch U5, a digital screen connection terminal J3 and a digital screen connection terminal J4, the 1st-9th and 11th pins of the latch U3 are connected with the control chip, the 12th-19th pins of the latch U3 are connected with the digital screen connection terminal J3, the 1st-7th and 11th pins of the latch U4 are connected with the control chip, the 14th-17th pins of the latch U4 are connected with the digital screen connection terminal J4, the 18th and 19th pins of the latch U4 are connected with the digital screen connection terminal J3, the 1st-7th and 11th pins of the latch U5 are connected with the control chip, and the 14th-19th pins of the latch U5 are connected with the digital screen connection terminal J4.

7. The display circuit of the central air conditioning purifier air outlet machine according to claim 4, characterized in that, The interface module comprises a temperature detection submodule and a harmful substance detection submodule, and the temperature detection submodule and the harmful substance detection submodule are connected with the control chip respectively. The interface module comprises a temperature detection submodule and a harmful substance detection submodule, and the temperature detection submodule and the harmful substance detection submodule are connected with the control chip respectively.

8. The display circuit of the central air conditioning purification air outlet machine according to claim 7, characterized in that, The temperature detection sub-module comprises a digital temperature sensor Q1, a first pin of the digital temperature sensor Q1 is grounded, a second pin of the digital temperature sensor Q1 is connected with the control chip, and a third pin of the digital temperature sensor Q1 is connected with a sixth pin of the voltage reduction chip.

9. The display circuit of the central air conditioning clean air outlet machine according to claim 7, characterized in that, The harmful substance detection sub-module comprises sensor connection terminals J5 and J7, second and fourth pins of the sensor connection terminal J5 are connected with the control chip, a third pin of the sensor connection terminal J5 is connected with the sixth pin of the voltage reduction chip, second and fourth pins of the sensor connection terminal J7 are connected with the control chip, and a third pin of the sensor J7 is connected with the sixth pin of the voltage reduction chip.

10. The display circuit of the central air conditioning purifier air outlet machine according to claim 4, characterized in that, The data uploading interface sub-module comprises an RS485 chip, a common mode filter L4, an ESD static protection diode D2 and a data connection terminal J6, first to fourth pins of the RS485 chip are connected with the control chip, an eighth pin of the RS485 chip is connected with the sixth pin of the voltage reduction chip, a seventh pin of the RS485 chip is connected with a second pin of the common mode filter L4 through a resistor R9, a first pin of the common mode filter L4 is connected with a second pin of the data connection terminal J6, a sixth pin of the RS485 chip is connected with a third pin of the common mode filter L4 through a resistor R10, a fourth pin of the common mode filter L4 is connected with a first pin of the data connection terminal J6, and the ESD static protection diode D2 is connected in parallel between the common mode filter L4 and the data connection terminal J6.

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