Frequency conversion control circuit

Abstract

The utility model relates to the technical field of control circuits, and discloses a frequency conversion control circuit. The system comprises a power supply unit, a mode selection unit, a control unit, a frequency conversion master control unit and a terminal device. The control unit is electrically connected with the power supply unit and the mode selection unit. The frequency conversion main control unit is electrically connected with the control unit and is used for outputting a frequency conversion control signal; and the terminal equipment is electrically connected with the frequency conversion main control unit and is used for changing the working frequency according to the frequency conversion control signal. The frequency conversion control circuit can efficiently and intelligently control terminal equipment in the dish washing machine in an energy-saving manner.

Description

Technical Field

[0001] The utility model relates to the technical field of control circuits, in particular to a frequency conversion control circuit. Background Art

[0002] A variable frequency dishwasher is a dishwasher that uses variable frequency technology. By controlling the speed of the motor, it can achieve automatic adjustment of the washing, rinsing, and draining processes. Compared with traditional fixed-speed dishwashers, variable frequency dishwashers have higher washing efficiency, lower energy consumption, and more stable washing efficiency. The advantages of variable frequency dishwashers are high efficiency and energy saving. However, the control circuit of existing dishwashers no longer meets the current requirements for high efficiency and energy saving. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a frequency conversion control circuit that can efficiently, energy-savingly and intelligently control a dishwashing device.

[0004] According to the frequency conversion control circuit of the embodiment of the utility model, it includes:

[0005] Power supply unit;

[0006] Mode selection unit;

[0007] a control unit, electrically connected to the power supply unit and the mode selection unit respectively;

[0008] A frequency conversion main control unit, electrically connected to the control unit, and configured to output a frequency conversion control signal;

[0009] The terminal device is electrically connected to the frequency conversion main control unit, and the terminal device is used to change the operating frequency according to the frequency conversion control signal.

[0010] According to some embodiments of the present utility model, the power supply unit includes:

[0011] A rectifier and filter module, the input end of which is connected to the power supply unit;

[0012] A transformer module, the input end of which is electrically connected to the output end of the rectifying and filtering module, and the output end of the transformer module is electrically connected to the control unit;

[0013] The step-down module has an input end electrically connected to the output end of the transformer module, and the output end of the step-down module is electrically connected to the control unit.

[0014] According to some embodiments of the present utility model, the control unit includes:

[0015] A control chip, a first end of which is electrically connected to the power supply unit, a second end of which is electrically connected to the mode selection unit, and a third end and a fourth end of which are electrically connected to the frequency conversion main control unit respectively.

[0016] According to some embodiments of the present utility model, the control unit further includes:

[0017] A first triode, a base of which is connected to the fifth terminal of the control chip;

[0018] A second triode, a base of which is connected to the sixth terminal of the control chip, a collector of which is connected to the emitter of the first triode, and an emitter of the second triode is grounded;

[0019] A buzzing device, one end of which is connected to the power supply unit, and the other end of which is connected to the collector of the first transistor, and the buzzing device is used to emit a buzzing sound.

[0020] According to some embodiments of the embodiments of the present utility model, the control unit further includes: a plurality of sensor interfaces, each of the sensor interfaces is electrically connected to the control unit respectively.

[0021] According to some embodiments of the present utility model, the frequency conversion main control unit includes:

[0022] A first coupler, an input end of which is electrically connected to the control unit;

[0023] A second coupler, an output end of which is electrically connected to the control unit;

[0024] A frequency conversion main control chip, a first end of which is connected to the output end of the first coupler, and a second end of which is connected to the input end of the second coupler;

[0025] The first signal conversion device has an input end connected to the third end of the frequency conversion main control chip, and an output end of the first signal conversion device is used to output a frequency conversion control signal.

[0026] According to some embodiments of the embodiments of the present utility model, the mode selection unit includes:

[0027] A plurality of mode selection devices are each electrically connected to the control unit.

[0028] According to some embodiments of the embodiments of the present utility model, the mode selection unit further includes:

[0029] The second signal conversion device has an input end electrically connected to each of the mode selection devices, and an output end electrically connected to the control unit.

[0030] According to some embodiments of the embodiments of the present utility model, the terminal device includes:

[0031] A plurality of motors, each of which is electrically connected to the frequency conversion main control unit.

[0032] The utility model provides a frequency conversion control circuit, which has at least the following beneficial effects: controlling the terminal device through the mode selection unit, the control unit and the frequency conversion main control unit, thereby realizing efficient, energy-saving and intelligent control of the dishwasher terminal device.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 It is a structural schematic diagram of the frequency conversion control circuit of an embodiment of the utility model;

[0036] Figure 2 This is a schematic diagram of the circuit principle of the rectifier and filter module of the embodiment of the utility model;

[0037] Figure 3 This is a schematic diagram of the circuit principle of the voltage conversion module of an embodiment of the utility model;

[0038] Figure 4 This is a schematic diagram of the circuit principle of the voltage reduction module of the embodiment of the utility model;

[0039] Figure 5 A schematic diagram of the circuit principle of the mode selection unit of an embodiment of the utility model;

[0040] Figure 6 This is a schematic diagram of the circuit principle of the control unit of the utility model embodiment:

[0041] Figure 7 The figure is a schematic diagram of the circuit principle of the frequency conversion main control unit of the embodiment of the utility model.

[0042] Reference numerals: power supply unit 100 , rectification and filtering module 110 , voltage conversion module 120 , voltage reduction module 130 , mode selection unit 200 , control unit 300 , frequency conversion main control unit 400 , terminal device 500 . DETAILED DESCRIPTION

[0043] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0044] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of the first, second, third, fourth, and fifth, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0046] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably confirm the specific meaning of the above terms in the present utility model in combination with the specific content of the technical solution.

[0047] refer to Figure 1 According to the frequency conversion control circuit of the embodiment of the utility model, it includes:

[0048] A power supply unit 100;

[0049] Mode selection unit 200;

[0050] The control unit 300 is electrically connected to the power supply unit 100 and the mode selection unit 200 respectively;

[0051] The frequency conversion main control unit 400 is electrically connected to the control unit 300, and the frequency conversion main control unit 400 is used to output a frequency conversion control signal;

[0052] The terminal device 500 is electrically connected to the frequency conversion main control unit 400, and the terminal device 500 is used to change the operating frequency according to the frequency conversion control signal.

[0053] refer to Figure 2 , Figure 3 and Figure 4According to some embodiments of the present utility model, the power supply unit 100 includes:

[0054] The rectifier and filter module 110 has an input end connected to the power supply unit 100;

[0055] The transformer module 120 has an input end electrically connected to the output end of the rectifier and filter module 110 , and an output end of the transformer module 120 electrically connected to the control unit 300 ;

[0056] The input end of the step-down module 130 is electrically connected to the output end of the transformer module 120 , and the output end of the step-down module 130 is electrically connected to the control unit 300 .

[0057] Specifically, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the input end of the rectifier and filter module 110 is connected to the first power supply, the first power supply includes the mains power, the rectifier and filter module 110 is used to rectify and filter the first power supply, the transformer module 120 converts the 220V mains power into 12V, and converts the 12V into 5V to power the control unit 300. The buck module 130 is used to convert 12V into 5V in DC-DC. The output end of the frequency conversion main control unit 400 is connected to the terminal device 500, and the frequency conversion control signal output by the frequency conversion main control unit 400 is used to control the terminal device 500; the sensor unit can obtain relevant parameters from the terminal device 500 or the external environment, and the sensor unit can send the change information of the terminal device 500 or the external environment to the control unit 300, and the control unit 300 controls the output of the frequency conversion main control unit 400, and then controls the terminal device 500.

[0058] refer to Figure 3 , according to some embodiments of the present utility model, the voltage transformation module 120 includes a transformer T1, a first diode D2, a first capacitor C5, and a second diode D1;

[0059] One end of the primary of the transformer T1 is connected to the first power supply, and one end of the secondary of the transformer T1 is grounded;

[0060] The anode of the first diode D2 is connected to the other end of the primary of the transformer T1;

[0061] One end of the first capacitor C5 is connected to the cathode of the first diode D2, and the other end of the first capacitor C5 is connected to one end of the primary of the transformer T1;

[0062] The anode of the second diode D1 is connected to the other end of the secondary of the transformer T1 , and the cathode of the second diode D1 is connected to the input end of the step-down unit 200 .

[0063] refer to Figure 4, according to some embodiments of the present utility model, the buck module 130 includes a third coupler U3, a third diode D3, a second capacitor C24, a fourth diode D4, a third signal conversion device U5, and a fourth coupler U4;

[0064] The input end of the third coupler U3 is connected to the output end MNK_5 of the transformer module 120;

[0065] The cathode of the third diode D3 is connected to the output end of the third coupler U3 through the device IC1;

[0066] One end of the second capacitor C24 is connected to the anode of the third diode D3;

[0067] The anode of the fourth diode D4 is connected to the anode of the third diode D3;

[0068] The input end of the third signal conversion device U5 is connected to the other end of the second capacitor C24 and the cathode D4 of the fourth diode;

[0069] One end of the fourth coupler U4 is connected to one end of the third signal conversion device U5 , and the other end of the fourth coupler U4 is connected to the H-EN end of the control unit 300 .

[0070] refer to Figure 6 According to some embodiments of the present utility model, the control unit 300 includes a control chip U15, a pin 22 of the control chip U15 is connected to the H-EN terminal of the buck unit 200, the control chip U15 is also connected to the output terminal of the mode selection unit 200, and the pin 31 (P2.6 terminal) and the pin 32 (P2.7 terminal) of the control chip U15 are respectively connected to the frequency conversion main control unit 400. By selecting the mode of the mode selection unit 200, the mode selection information is converted in the control chip U15 and finally input into the frequency conversion main control unit 400.

[0071] refer to Figure 5 and Figure 6 , according to some embodiments of the present utility model, the control unit 300 further includes a fifth diode D7, a first transistor Q1, a second transistor Q2, a third transistor Q3, and a buzzer device BZ1;

[0072] The anode of the fifth diode D7 is connected to the pin 17 of the control chip U15;

[0073] The base of the first transistor Q1 is connected to the cathode of the fifth diode D7;

[0074] The base of the second transistor Q2 is connected to the pin 4 of the control chip U15, the collector of the second transistor Q2 is connected to the emitter of the first transistor Q1, and the emitter of the second transistor Q2 is grounded;

[0075] One end of the buzzer device BZ1 is connected to the second power supply, which is a +12V power supply, and the other end of the buzzer device is connected to the collector of the first transistor Q1; the control chip U15 sends control information to the frequency conversion main control unit 400, and the control chip U15 receives the mode selection information from the mode selection unit 200 or the information output by the frequency conversion main control unit 400, and the buzzer device BZ1 will emit a buzzing sound;

[0076] The third transistor Q3 has a gate connected to the pin 20 of the control chip U15 , a source connected to the ground, and a drain connected to the output end of the mode selection unit 200 .

[0077] refer to Figure 1 According to some embodiments of the utility model, the control unit 300 also includes: multiple sensor interfaces (not shown in the figure), each sensor interface is connected to the input end of the control unit 300, the sensor interface is connected to the sensor in the sensing unit, the sensor receives relevant information of the terminal device 500 or the external environment and sends the relevant information to the control chip U15, the control chip U15 outputs control information to the frequency conversion main control unit 400 according to the relevant information, and enables the frequency conversion main control unit 400 to ultimately control the terminal device 500.

[0078] refer to Figure 7 , According to some embodiments of the present utility model, the frequency conversion main control unit 400 includes a first coupler U12, a second coupler U10, a frequency conversion main control chip U8, and a second signal conversion device U7;

[0079] The input end of the first coupler U12 is connected to the P2.6 end of the control unit 300;

[0080] The output end of the second coupler U10 is connected to the P2.7 end of the control unit 300;

[0081] The first end (pin 11) of the frequency conversion main control chip U8 is connected to the output end of the first coupler U12, and the second end (pin 13) of the frequency conversion main control chip U8 is connected to the input end of the second coupler U10;

[0082] The input end of the first signal conversion device U7 is connected to the output end of the frequency conversion main control chip U8. The first signal conversion device U7 converts the output signal from the output end of the frequency conversion main control chip U8 and outputs a frequency conversion control signal recognizable by the terminal device 500.

[0083] refer to Figure 7 , According to some embodiments of the present utility model, the frequency conversion main control unit 400 further includes a first comparator U11A, a second comparator U11B, a third comparator U9A, and a second comparator U9B;

[0084] The output end of the first comparator U11A is connected to the input end of the frequency conversion main control chip U8, and the input end of the first comparator is connected to the output end of the first signal conversion device U7;

[0085] The output end of the second comparator U11B is connected to the input end of the frequency conversion main control chip U8, and the input end of the second comparator is connected to the output end of the first signal conversion device U7;

[0086] The output end of the third comparator U9A is connected to the input end of the frequency conversion main control chip U8, and the first input end of the third comparator is connected to the third power supply, which is a +H5V power supply;

[0087] The output end of the second comparator U9B is connected to the second input end of the third comparator U9A, and the input end of the second comparator is connected to the output end of the first signal conversion device U7. The first comparator U11A, the second comparator U11B, the third comparator U9A, and the second comparator U9B are all used to compare the signals inputted thereto at both ends, and input the comparison results into the frequency conversion main control chip U8, which processes the comparison results and outputs the corresponding frequency conversion control signal.

[0088] According to some embodiments of the present invention, the mode selection unit 200 includes:

[0089] A plurality of mode selection devices are provided, each of which is electrically connected to the control unit 300 .

[0090] refer to Figure 5 According to some embodiments of the present utility model, the mode selection unit 200 also includes a second signal conversion device U14, the input end of the second signal conversion device U14 is electrically connected to each of the mode selection devices, and the output end of the second signal conversion device U14 is connected to the input end of the control unit 300.

[0091] Specifically, refer to Figure 2 and Figure 5, the mode selection device includes a relay and a control device, one end of the relay coil of the relay is connected to the fourth power supply, the fourth power supply is a +12V power supply, the other end of the relay coil of the relay is connected to the input end of the control unit 300, one end of the switch of the relay is connected to one end of the input end of the conversion unit 100, and the other end of the switch of the relay is connected to the other end of the input end of the conversion unit 100. One end of the control device CN5 in the first mode selection device is connected to the port MHK_1 of the mode selection unit 200, the other end of the control device CN5 is connected to one end of the switch of the relay RL1, and the other end of the switch of the relay RL1 is connected to the port MHK_2 of the mode selection unit 200. The connection mode of the switch of the relay in each subsequent mode selection device and its corresponding control device is consistent with the connection mode of the first mode selection device. The control device selectively turns on and off the switch of the relay to select, start, end, and switch the terminal device 500 in the preset mode.

[0092] According to some embodiments of the embodiments of the present utility model, the terminal device 500 includes:

[0093] Multiple motors, each motor is electrically connected to the frequency conversion main control unit 400.

[0094] Specifically, the motor includes a washing motor, a dehydration motor, and a drying motor.

[0095] A frequency conversion control circuit of the utility model has at least the following beneficial effects: controlling the terminal device 500 through the mode selection unit 200, the control unit 300, and the frequency conversion main control unit 400, thereby realizing efficient, energy-saving, and intelligent control of the dishwasher terminal device 500.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0097] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A frequency conversion control circuit, characterized in that: include: Power supply unit; Mode selection unit; a control unit, electrically connected to the power supply unit and the mode selection unit respectively; A frequency conversion main control unit, electrically connected to the control unit, and configured to output a frequency conversion control signal; The terminal device is electrically connected to the frequency conversion main control unit, and the terminal device is used to change the operating frequency according to the frequency conversion control signal.

2. The frequency conversion control circuit according to claim 1, characterized in that: The power supply unit comprises: A rectifier and filter module, the input end of which is connected to the power supply unit; A transformer module, the input end of which is electrically connected to the output end of the rectifying and filtering module, and the output end of the transformer module is electrically connected to the control unit; The step-down module has an input end electrically connected to the output end of the transformer module, and the output end of the step-down module is electrically connected to the control unit.

3. The frequency conversion control circuit according to claim 1, characterized in that: The control unit comprises: A control chip, a first end of which is electrically connected to the power supply unit, a second end of which is electrically connected to the mode selection unit, and a third end and a fourth end of which are electrically connected to the frequency conversion main control unit respectively.

4. The frequency conversion control circuit according to claim 3, characterized in that: The control unit also includes: A first triode, a base of which is connected to the fifth terminal of the control chip; A second triode, a base of which is connected to the sixth terminal of the control chip, a collector of which is connected to the emitter of the first triode, and an emitter of the second triode is grounded; A buzzing device, one end of which is connected to the power supply unit, and the other end of which is connected to the collector of the first transistor, and the buzzing device is used to emit a buzzing sound.

5. The frequency conversion control circuit according to claim 3, characterized in that: The control unit further includes: a plurality of sensor interfaces, each of which is electrically connected to the control unit.

6. The frequency conversion control circuit according to claim 1, characterized in that: The frequency conversion main control unit comprises: A first coupler, an input end of which is electrically connected to the control unit; A second coupler, an output end of which is electrically connected to the control unit; A frequency conversion main control chip, a first end of which is connected to the output end of the first coupler, and a second end of which is connected to the input end of the second coupler; The first signal conversion device has an input end connected to the third end of the frequency conversion main control chip, and an output end of the first signal conversion device is used to output a frequency conversion control signal.

7. The frequency conversion control circuit according to claim 1, characterized in that: The mode selection unit comprises: A plurality of mode selection devices are each electrically connected to the control unit.

8. The frequency conversion control circuit according to claim 7, characterized in that: The mode selection unit also includes: The second signal conversion device has an input end electrically connected to each of the mode selection devices, and an output end electrically connected to the control unit.

9. The frequency conversion control circuit according to claim 1, characterized in that: The terminal device comprises: A plurality of motors, each of which is electrically connected to the frequency conversion main control unit.

Images