Control panel of household electrical appliance

Abstract

The utility model discloses a control panel for household appliances, which belongs to the technical field of control panels and comprises a chip U1, a chip U2, a resistor R1, a resistor R3, a resistor R4, a resistor R19, a resistor R20, a resistor R21, a capacitor C6, a capacitor C7, a diode D1, a diode D2, a diode D3, a diode D4, a + 5V voltage end and a chip U3. The control panel can control different display panels, that is, the control panel can be in butt joint with a hardware control circuit, the first control mode is that the display panel is driven in a hardware mode, but in the driving communication process, the display panel sends an information instruction to the control panel when the machine type I is powered on, and the instruction can be conveniently recognized by the control panel; the control can be carried out in a coding mode, and display panels driven by different hardware and display panels driven by different single-chip microcomputers can be controlled through the control mode; the material types are greatly reduced, and the manufacturability and standardization of products are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control panels for household appliances, in particular to a control panel for household appliances. Background Art

[0002] When the traditional control board controls the display board, if the display board is a hard drive chip, the control board drives the indicator light of the display board or receives the signal from the display board through hardware drive. If the display board is an indicator light controlled by a single-chip microcomputer and receives the corresponding key signal, the control board and the display board send the corresponding LED indication command and receive the corresponding key signal through serial communication. These two types of display boards need to be controlled by two control motherboards. If there are multiple combinations, multiple control boards are required, which brings certain troubles to the unification of materials and procurement quality production management. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a control panel for household appliances in view of the deficiencies of the background technology. The control panel can control different display panels, that is, can be connected to a hardware control circuit.

[0004] The utility model adopts the following technical solutions to solve the above technical problems:

[0005] A control board of a household appliance, comprising a chip U1, a chip U2, a resistor R1, a resistor R3, a resistor R4, a resistor R19, a resistor R20, a resistor R21, a capacitor C6, a capacitor C7, a diode D1, a diode D2, a diode D3, a diode D4, a +5V voltage terminal and a chip U3;

[0006] Among them, the pin 21 of the chip U1 is respectively connected to one end of the capacitor C6 and the +5V voltage terminal, the other end of the capacitor C6 is respectively connected to the pin 22 of the chip U1, the pin 25 of the chip U1, the pin 28 of the chip U1, one end of the capacitor C7 and grounded, the other end of the capacitor C7 is respectively connected to the pin 7 of the chip U1 and the +5V voltage terminal, the pin 2 of the chip U1 is respectively connected to one end of the resistor R1 and one end of the resistor R21, the pin 3 of the chip U1 is respectively connected to one end of the resistor R20 and one end of the resistor R4, the pin 4 of the chip U1 is respectively connected to one end of the resistor R3 and one end of the resistor R19, and the other end of the resistor R21 is respectively connected to the resistor R19. The other end of resistor R20, the other end of resistor R19 and the +5V voltage end, pin 11 of chip U1 is connected to the anode of diode D4, pin 12 of chip U1 is connected to the anode of diode D1, pin 13 of chip U1 is connected to the anode of diode D2, pin 14 of chip U1 is connected to the anode of diode D3, the cathode of diode D4, the cathode of diode D1, the cathode of diode D2 and the cathode of diode D3 are respectively connected to pin 5 of chip U1, pin 14 of chip U3 is connected to the other end of resistor R3, pin 17 of chip U3 is connected to the other end of resistor R4, and pin 14 of chip U8 is connected to the other end of resistor R1.

[0007] As a further preferred solution of the control board of a household appliance of the utility model, the chip U1 adopts TM1628.

[0008] As a further preferred solution of the control board of a household appliance of the utility model, the chip U3 adopts SH79F083A.

[0009] Compared with the prior art, the utility model adopts the above technical solution and has the following technical effects:

[0010] The utility model discloses a control board for household appliances. The control board can control different display boards, that is, it can be connected to a hardware control circuit. The first control mode is driven by the display board in a hardware mode. However, in the process of driving communication, the display board will send an information instruction to the control when the machine is powered on. This instruction is convenient for the control board to identify, and can be carried out in a coded manner. Through this control mode, display boards driven by different hardware can be controlled, and display boards driven by different single-chip microcomputers can be controlled. Especially for household appliances, different display panels are frequently changed, and the display boards are quite different. When some logical functions are quite different and the functions are relatively complex, one type of display driving scheme cannot fully meet the requirements. Then the driving mode must be changed to ensure that the main control board does not generate too many new material types, does not cause corresponding management difficulties for procurement, quality and production management, and unifies standardization considerations. The use of this scheme is a very excellent way to greatly reduce the material types and improve the processability and standardization of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 It is the structural principle diagram of the utility model;

[0013] Figure 2 It is a circuit diagram of a control panel of a household appliance of the utility model;

[0014] Figure 3 This is a control method of the hardware-driven display panel of the utility model. DETAILED DESCRIPTION

[0015] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] This utility model patent designs a control panel, which can control different display panels, that is, it can connect to the hardware control circuit and also control the corresponding software control circuit.

[0018] The present invention provides an electric control board, such as Figure 1 As shown, the first control method is driven by the display panel in hardware mode, but in this drive communication process, the display panel will send a message instruction to the control when the model is powered on. This instruction will facilitate the control panel to identify it, which can be done in a coded manner.

[0019] For example, 16 data bits are encoded from 0000 to 1111, and these data bits are encoded in advance. The control method is shown in Table 1:

[0020] Table 1

[0021]

[0022] In actual control, it is possible to design different coding rules according to different chip types. The above coding rules are only a representative one. For example, different hardware driver chips may have different rules for model identification. In these coding rules, the first thing to consider is that the codes of these models cannot be repeated and ensure that the microcontroller on the motherboard can recognize these coding rules.

[0023] Similarly, when the display board is a single-chip microcomputer, after it is powered on, the single-chip microcomputer on the display board will first simulate the code value compiled in advance, and send this code value to the main control board at the beginning of power-on.

[0024] According to this coding rule, the single chip microcomputer on the mainboard receives the corresponding coding. According to these coding, different display panel models can be driven and controlled, and the logical output of different models can be realized.

[0025] This control method can control display panels driven by different hardware and display panels driven by different single-chip microcomputers. Especially for household appliances, if different display panels are frequently changed, the display panels will be quite different. When some logical functions are quite different and the functions are relatively complex, one type of display drive solution cannot fully meet the requirements. Then the drive method must be changed to ensure that the main control board does not produce too many new types of materials, does not cause corresponding management difficulties in procurement, quality and production management, and unifies and standardizes the considerations. This solution is a very excellent way.

[0026] This control method greatly reduces the types of materials and improves the processability and standardization of products.

[0027] A control panel for household appliances, such as Figure 2 As shown, it includes chip U1, chip U2, resistor R1, resistor R3, resistor R4, resistor R19, resistor R20, resistor R21, capacitor C6, capacitor C7, diode D1, diode D2, diode D3, diode D4, +5V voltage terminal and chip U3;

[0028] Among them, the pin 21 of the chip U1 is respectively connected to one end of the capacitor C6 and the +5V voltage terminal, the other end of the capacitor C6 is respectively connected to the pin 22 of the chip U1, the pin 25 of the chip U1, the pin 28 of the chip U1, one end of the capacitor C7 and grounded, the other end of the capacitor C7 is respectively connected to the pin 7 of the chip U1 and the +5V voltage terminal, the pin 2 of the chip U1 is respectively connected to one end of the resistor R1 and one end of the resistor R21, the pin 3 of the chip U1 is respectively connected to one end of the resistor R20 and one end of the resistor R4, the pin 4 of the chip U1 is respectively connected to one end of the resistor R3 and one end of the resistor R19, and the other end of the resistor R21 is respectively connected to the resistor R19. The other end of resistor R20, the other end of resistor R19 and the +5V voltage end, pin 11 of chip U1 is connected to the anode of diode D4, pin 12 of chip U1 is connected to the anode of diode D1, pin 13 of chip U1 is connected to the anode of diode D2, pin 14 of chip U1 is connected to the anode of diode D3, the cathode of diode D4, the cathode of diode D1, the cathode of diode D2 and the cathode of diode D3 are respectively connected to pin 5 of chip U1, pin 14 of chip U3 is connected to the other end of resistor R3, pin 17 of chip U3 is connected to the other end of resistor R4, and pin 14 of chip U8 is connected to the other end of resistor R1.

[0029] Preferably, the chip U1 adopts TM1628, and the chip U3 adopts SH79F083A.

[0030] In the above principle, the arrangement and combination of the four diodes D1, D2, D3, and D4 can be welded or not welded to form a model identification code, which is sent to the microcontroller through the second pin of the U1 chip to identify the model and let the microcontroller know the type of this model.

[0031] This example is a control method for hardware-driven display panels, such as Figure 3 As shown,

[0032] In the above principle, the U2 chip is a single-chip microcomputer. Due to the increase in various corresponding functions, if the corresponding functions cannot be completed by relying solely on the hardware driver chip, and the corresponding functions are realized through the single-chip microcomputer, then it is hoped that the same motherboard can be used. When the whole machine is powered on, the U2 single-chip microcomputer simulates a code, and its code is different from the codes of other models. The motherboard can recognize that this model is a single-chip microcomputer controlled model, and can implement the corresponding control logic, and complete the realization of a unified electronic control board.

[0033] This example is also a control method of communication.

[0034] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that those terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0035] The above embodiments are only for explaining the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution according to the technical idea proposed by the utility model shall fall within the protection scope of the utility model. The above embodiments of the utility model are described in detail, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the utility model.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A control panel for a household appliance, characterized in that: It includes chip U1, chip U2, resistor R1, resistor R3, resistor R4, resistor R19, resistor R20, resistor R21, capacitor C6, capacitor C7, diode D1, diode D2, diode D3, diode D4, +5V voltage terminal and chip U3; Among them, the pin 21 of the chip U1 is respectively connected to one end of the capacitor C6 and the +5V voltage terminal, the other end of the capacitor C6 is respectively connected to the pin 22 of the chip U1, the pin 25 of the chip U1, the pin 28 of the chip U1, one end of the capacitor C7 and grounded, the other end of the capacitor C7 is respectively connected to the pin 7 of the chip U1 and the +5V voltage terminal, the pin 2 of the chip U1 is respectively connected to one end of the resistor R1 and one end of the resistor R21, the pin 3 of the chip U1 is respectively connected to one end of the resistor R20 and one end of the resistor R4, the pin 4 of the chip U1 is respectively connected to one end of the resistor R3 and one end of the resistor R19, and the other end of the resistor R21 is respectively connected to the resistor R19. The other end of resistor R20, the other end of resistor R19 and the +5V voltage end, pin 11 of chip U1 is connected to the anode of diode D4, pin 12 of chip U1 is connected to the anode of diode D1, pin 13 of chip U1 is connected to the anode of diode D2, pin 14 of chip U1 is connected to the anode of diode D3, the cathode of diode D4, the cathode of diode D1, the cathode of diode D2 and the cathode of diode D3 are respectively connected to pin 5 of chip U1, pin 14 of chip U3 is connected to the other end of resistor R3, pin 17 of chip U3 is connected to the other end of resistor R4, and pin 14 of chip U8 is connected to the other end of resistor R1.

2. A control panel for a household appliance according to claim 1, characterized in that: The chip U1 adopts TM1628.

3. The control panel of a household appliance according to claim 1, characterized in that: The chip U3 adopts SH79F083A.

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