CN218783740U - Fan forward and backward rotation control circuit applied to bathroom heater - Google Patents
Fan forward and backward rotation control circuit applied to bathroom heater Download PDFInfo
- Publication number
- CN218783740U CN218783740U CN202223117550.0U CN202223117550U CN218783740U CN 218783740 U CN218783740 U CN 218783740U CN 202223117550 U CN202223117550 U CN 202223117550U CN 218783740 U CN218783740 U CN 218783740U
- Authority
- CN
- China
- Prior art keywords
- resistor
- diode
- wall switch
- bathroom heater
- rectifier bridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Central Heating Systems (AREA)
Abstract
The embodiment of the utility model discloses fan positive and negative rotation control circuit applied to a bath heater, which comprises an MOS tube Q1, a diode D2, a diode D3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1 and a capacitor EC1, wherein one pole of the input end of a rectifier bridge is connected with a zero line, and the other pole of the input end is connected with a live line through a wall switch SW 1; the diode D1, the diode D2 and the diode D3 are sequentially connected in series, the anode of the diode D1 is grounded, and the cathode of the diode D3 is connected with the anode of the output end of the rectifier bridge; one end of the wall switch SW2 is connected with a live wire, and the other end of the wall switch SW2 is connected between the diode D1 and the diode D2; the gate of the MOS transistor Q1 is connected between the diode D2 and the diode D3 through a resistor R4, a resistor R2, and a resistor R1 which are connected in series in this order. The utility model discloses make direct current fan drive circuit's positive and negative rotation control more simple and convenient, and then make the bathroom heater product that adopts low pressure direct current fan more convenient at the switching process of taking a breath, user experience is better.
Description
Technical Field
The utility model relates to a household electrical appliances technical field especially relates to an use fan control circuit that is just reversing on bathroom heater.
Background
The traditional bathroom heater has 2 kinds of fans: 1. controlling the forward and reverse rotation of the high-voltage alternating current fan in a high-voltage network by using the high-voltage alternating current fan; 2. or the low-voltage direct-current fan is used, and the switch is directly used for controlling the forward and reverse rotation of the low-voltage direct-current fan in a low-voltage network.
The existing bathroom heater using the high-voltage alternating-current fan has low energy efficiency, is not energy-saving and environment-friendly; the bathroom heater using the low-voltage direct-current fan directly controls the forward and reverse rotation of the low-voltage direct-current fan through a switch in a low-voltage network, the wall switch of the traditional bathroom heater is not universal, the control switch needs to be specially installed in a low-voltage system, inconvenience exists in structural design, and the ventilation (air intake or exhaust is determined by the forward and reverse rotation of the fan) experience of the whole product is inconvenient.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem that will solve provides a fan just reverse control circuit who uses on the bathroom heater to make the wall switch through traditional bathroom heater realize just reversing at the low pressure direct current fan of high-voltage network control bathroom heater.
In order to solve the above technical problem, an embodiment of the present invention provides a fan forward/backward rotation control circuit applied to a bathroom heater, the bathroom heater includes a rectifier bridge, a wall switch SW1, a wall switch SW2, an MCU, a dc fan, and a non-isolated switch power supply for supplying power to the MCU and the dc fan, the control circuit includes a MOS transistor Q1, a diode D2, a diode D3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, and a capacitor EC1, wherein,
one pole of the input end of the rectifier bridge is connected with a zero line, the other pole of the input end of the rectifier bridge is connected with a live line through a wall switch SW1, the anode of the output end of the rectifier bridge is connected with a non-isolated switch power supply, and the cathode of the output end of the rectifier bridge is grounded;
the capacitor EC1 is connected in parallel with the input end of the non-isolated switching power supply;
the diode D1, the diode D2 and the diode D3 are sequentially connected in series, the anode of the diode D1 is grounded, and the cathode of the diode D3 is connected with the anode of the output end of the rectifier bridge;
one end of the wall switch SW2 is connected with a live wire, and the other end of the wall switch SW2 is connected between the diode D1 and the diode D2;
the grid electrode of the MOS tube Q1 is connected between the diode D2 and the diode D3 through a resistor R4, a resistor R2 and a resistor R1 which are sequentially connected in series, the source electrode of the MOS tube Q1 is grounded, and the drain electrode of the MOS tube Q1 outputs a signal to the MCU and is connected with one output of the non-isolated switch power supply through a resistor R5;
after the resistor R3 and the capacitor C1 are connected in parallel, one end of the resistor R3 is grounded, and the other end of the resistor R2 is connected between the resistor R4 and the resistor.
Further, the wall switch SW1 and the wall switch SW2 are respectively connected with the fuse F1 and the fuse F2 in series.
Further, the transistor also comprises a resistor R6, and the drain electrode of the MOS transistor Q1 outputs a signal to the MCU through the resistor R6.
Further, the MOS transistor Q1 is an NMOS transistor.
Further, the resistance values of the resistor R1 and the resistor R2 are the same.
The utility model has the advantages that: the utility model makes the bathroom heater product adopting the low-voltage direct current fan more convenient and better in the air exchange switching process, and the low-voltage direct current fan which is more energy-saving and environment-friendly is better applied; the utility model discloses make direct current fan drive circuit's positive and negative control simpler and more convenient, be favorable to low pressure direct current fan's control drive circuit to imbed in the motor casing, only need go out three lines (N, L1, L2, L1 and L2 connect outside wall switch SW1 and SW2 respectively) and make integrated spare part, integrated degree is higher for the global design of bathroom heater product is more simple and convenient.
Drawings
Fig. 1 is a circuit diagram of a fan forward and backward rotation control circuit applied to a bathroom heater according to an embodiment of the present invention.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
The bathroom heater comprises a rectifier bridge, a wall switch SW1, a wall switch SW2, an MCU, a direct current fan and a non-isolated switch power supply for supplying power to the MCU and the direct current fan.
Referring to fig. 1, the fan forward/backward rotation control circuit applied to the bathroom heater of the embodiment of the present invention includes an MOS transistor Q1, a diode D2, a diode D3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a fuse F2, a resistor R6, and a capacitor EC1.
One pole of the input end of the rectifier bridge is connected with a zero line, the other pole of the input end of the rectifier bridge is connected with a live line through a wall switch SW1, the anode of the output end of the rectifier bridge is connected with a non-isolated switch power supply, and the cathode of the output end of the rectifier bridge is grounded. The rectifier bridge converts the alternating current 220V input into direct current and outputs the direct current to the non-isolated switching power supply.
The capacitor EC1 is connected in parallel to the input of the non-isolated switching power supply.
The diode D1, the diode D2 and the diode D3 are sequentially connected in series, the anode of the diode D1 is grounded, and the cathode of the diode D3 is connected with the anode of the output end of the rectifier bridge.
The wall switch SW2 is connected with the live wire at one end and connected between the diode D1 and the diode D2 at the other end. The wall switch SW1 and the wall switch SW2 are connected in series with the fuse F1 and the fuse F2, respectively.
The grid of MOS pipe Q1 is connected between diode D2 and diode D3 through resistance R4, resistance R2, resistance R1 that establish ties in proper order, and MOS pipe Q1's source ground. The drain electrode of the MOS tube Q1 outputs signals to the MCU through a resistor R6 and is connected with one output of the non-isolated switch power supply through a resistor R5. The MOS tube Q1 is an NMOS tube. The resistance values of the resistor R1 and the resistor R2 are the same.
After the resistor R3 and the capacitor C1 are connected in parallel, one end of the resistor R is grounded, and the other end of the resistor R is connected between the resistor R4 and the resistor R2.
The utility model discloses a theory of operation does:
when the wall switch SW1 is closed and the wall switch SW2 is not closed, the rectifier bridge BD1 works, current directly flows to a non-isolation switch power supply through the rectifier bridge BD1, and the diode D3 is in reverse cut-off, so that no current flows to the G → S of the MOS tube Q1 to form a loop, the G → S of the MOS tube Q1 has no voltage difference, and the R3 and the R4 are used as pull-down resistors, the MOS tube Q1 cannot be conducted, and the MCU receives a normally high level signal at the moment.
When the wall switch SW2 is closed and the wall switch SW1 is not closed, a current flows through D2, R1 and R3 (current; L → SW1 → F1 → R1 → R2 → R3 → 4-2 pin diode → N of BD 1) only when L is in the positive half cycle, the voltage difference of G → S pin of the MOS tube Q1 is generated (R1, R2 and R3 form a resistance voltage division circuit, the point of division is connected in series with the G pole of R4 to Q1), the MOS tube Q1 is conducted, and the MCU receives a low level signal at the moment. When the L is in the negative half cycle, no loop circuit is arranged to enable current to flow through the device, but the capacitor C1 has an energy storage function, the stored energy in the L positive half cycle keeps the MOS transistor Q1 conducted in the L negative half cycle, the MOS transistor Q1 can be conducted in the whole time period in the whole L negative half cycle by adjusting the capacitance value of the capacitor C1, and the MCU also receives a low-level signal at the moment. Therefore, the MCU can receive a signal of a normally low level.
When the wall switch SW1 and the wall switch SW2 are closed at the same time, the effect is the same as "when the wall switch SW2 is closed, the wall switch SW1 is not closed".
In summary, when different wall switches are closed, the MCU will obtain different input signals, i.e. the switching conditions of the wall switches SW1 and SW2 can be detected, and an instruction for controlling the direct current fan to rotate forward and backward is given. The very high level signal and the very low level signal are both very easy to be identified and processed by the MCU, and are particularly suitable for the fan special chip with program curing. The utility model discloses convenience of customers can realize just reversing at the direct current fan of high voltage network control bathroom heater through the wall switch of traditional bathroom heater.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A fan forward and reverse rotation control circuit applied to a bathroom heater, the bathroom heater comprises a rectifier bridge, a wall switch SW1, a wall switch SW2, an MCU, a direct current fan and a non-isolated switch power supply for supplying power to the MCU and the direct current fan, and is characterized in that the control circuit comprises an MOS tube Q1, a diode D2, a diode D3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1 and a capacitor EC1, wherein,
one pole of the input end of the rectifier bridge is connected with a zero line, the other pole of the input end of the rectifier bridge is connected with a live line through a wall switch SW1, the positive pole of the output end of the rectifier bridge is connected with a non-isolated switch power supply, and the negative pole of the output end of the rectifier bridge is grounded;
the capacitor EC1 is connected in parallel with the input end of the non-isolated switching power supply;
the diode D1, the diode D2 and the diode D3 are sequentially connected in series, the anode of the diode D1 is grounded, and the cathode of the diode D3 is connected with the anode of the output end of the rectifier bridge;
one end of the wall switch SW2 is connected with a live wire, and the other end of the wall switch SW2 is connected between the diode D1 and the diode D2;
the grid electrode of the MOS tube Q1 is connected between the diode D2 and the diode D3 through a resistor R4, a resistor R2 and a resistor R1 which are sequentially connected in series, the source electrode of the MOS tube Q1 is grounded, and the drain electrode of the MOS tube Q1 outputs a signal to the MCU and is connected with one output of the non-isolated switch power supply through a resistor R5;
after the resistor R3 and the capacitor C1 are connected in parallel, one end of the resistor R is grounded, and the other end of the resistor R is connected between the resistor R4 and the resistor R2.
2. The blower forward and reverse rotation control circuit applied to the bathroom heater as claimed in claim 1, further comprising a fuse F1 and a fuse F2, wherein the wall switch SW1 and the wall switch SW2 are respectively connected in series with the fuse F1 and the fuse F2.
3. The blower forward and reverse rotation control circuit applied to the bathroom heater as claimed in claim 1, further comprising a resistor R6, wherein the drain of the MOS transistor Q1 outputs a signal to the MCU through the resistor R6.
4. The blower forward/reverse rotation control circuit applied to the bathroom heater as claimed in claim 1, wherein the MOS transistor Q1 is an NMOS transistor.
5. The fan forward and reverse rotation control circuit applied to the bathroom heater as claimed in claim 1, wherein the resistance of the resistor R1 is the same as the resistance of the resistor R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223117550.0U CN218783740U (en) | 2022-11-23 | 2022-11-23 | Fan forward and backward rotation control circuit applied to bathroom heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223117550.0U CN218783740U (en) | 2022-11-23 | 2022-11-23 | Fan forward and backward rotation control circuit applied to bathroom heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218783740U true CN218783740U (en) | 2023-03-31 |
Family
ID=85716752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223117550.0U Active CN218783740U (en) | 2022-11-23 | 2022-11-23 | Fan forward and backward rotation control circuit applied to bathroom heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218783740U (en) |
-
2022
- 2022-11-23 CN CN202223117550.0U patent/CN218783740U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4920763B2 (en) | Bridgeless active power factor correction circuit with logic control | |
| WO2022227954A1 (en) | Three-phase power converter circuit, household appliance, and control method and device | |
| CN105450141B (en) | AC motor drives and its driving method | |
| CN106992668A (en) | A kind of alternating current-direct current Mixed design dc source | |
| CN218783740U (en) | Fan forward and backward rotation control circuit applied to bathroom heater | |
| CN108667316A (en) | Ac-input type Switching Power Supply | |
| CN205562677U (en) | Around level power failure detection and control magnetic latching relay operate a switch and data storage's electric energy meter | |
| CN201374649Y (en) | Power supply circuit and air conditioner provided with same | |
| CN103513075B (en) | near infrared reading device and ammeter | |
| CN108336939B (en) | System and method for using and controlling permanent magnet AC motor | |
| CN203135735U (en) | Continuous current plant | |
| CN114740773A (en) | Wireless steam cleaner circuit | |
| CN108110732A (en) | AC blower fan driving device and air conditioner | |
| CN218829672U (en) | Direct current fan forward and reverse rotation control circuit applied to bathroom heater | |
| CN108322201A (en) | Electronic circuit, integrated alternating current switch circuit and control method of electronic circuit | |
| CN114123749A (en) | Soft start circuit, soft start control method, controller and air conditioner | |
| CN208797618U (en) | A kind of safety circuit and household appliance | |
| CN207637713U (en) | A kind of power control circuit suitable for electric locomotive contactor | |
| CN203787687U (en) | Cut-off type power-saving socket | |
| CN108183608B (en) | Boosting circuit | |
| CN207196824U (en) | The tracking adjusting power-saving device of central air-conditioning | |
| CN205725549U (en) | One has current mode and voltage-type integrated variable frequency system | |
| CN105790647B (en) | A kind of drive control system of permanent-magnetic brushless DC motor | |
| CN220067210U (en) | Power supply control circuit and household appliance | |
| CN218068620U (en) | Wireless steam cleaner circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |