CN213873096U - New fan switching control circuit, electric wire and new fan - Google Patents
New fan switching control circuit, electric wire and new fan Download PDFInfo
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- CN213873096U CN213873096U CN202022515002.8U CN202022515002U CN213873096U CN 213873096 U CN213873096 U CN 213873096U CN 202022515002 U CN202022515002 U CN 202022515002U CN 213873096 U CN213873096 U CN 213873096U
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Abstract
The utility model discloses a new fan switching control circuit, electric wire and new fan, include: the circuit comprises a first resistor, a first capacitor, a timer, a switching element and a relay; the charging current of the first capacitor is controlled by the first resistor, the voltages at two ends of the first capacitor are used as the input voltage of the timer, the timer is used for realizing the jump of the output level, the switching-off of the switching element is controlled according to the level output by the timer, and the power supply circuit of the fresh air motor is switched on by the attraction of the relay contact, so that the delayed opening of the fresh air motor is realized, the situation that unfiltered fresh air flows backwards from the air exhaust duct into the room to influence the indoor air cleaning degree is avoided, and the fresh air charging device has the characteristics of simple structure and low cost.
Description
Technical Field
The utility model belongs to the technical field of new fan and specifically relates to a new fan switching control circuit, electric wire and new fan are related to.
Background
The fresh air machine comprises a fresh air motor and an exhaust motor, the fresh air motor is used for feeding fresh air into the room, the exhaust motor exhausts dirty air in the room,
the existing fresh air machine often switches fresh air and air exhaust functions through a switching button. When the fresh air machine is switched from the air exhaust function to the fresh air function, the air exhaust motor is closed to operate, the impeller of the air exhaust motor decelerates under the action of inertia force and continues to operate until the impeller stops, the air exhaust check valve cannot be closed immediately under the action of wind power in the time period, the fresh air motor starts to operate to suck fresh air into the air duct, the air exhaust check valve cannot be automatically closed under the action resistance of the fresh air at the moment, the air outlet is always open, and part of the fresh air which is not filtered flows backwards into the room from the air exhaust air duct to influence the indoor air cleanness degree.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's shortcoming and not enough, a new fan switching control circuit, electric wire and new fan that control new trend motor time delay was opened are provided.
In a first aspect, the utility model provides a new fan switching control circuit, include: the circuit comprises a first resistor, a first capacitor, a timer, a switching element and a relay;
the high trigger end of the timer is respectively connected with the second end of the first resistor and the first end of the first capacitor, and the low trigger end of the timer is connected with the high trigger end;
the first end of the first resistor is connected with a power supply, and the second end of the first capacitor is grounded;
the switching element comprises a control terminal, a first terminal and a second terminal; the first end of the switch element is connected with the relay coil, the second end of the switch element is grounded, and the control end of the switch element is connected with the output end of the timer;
and a pair of contacts of the relay is connected with a power supply circuit of the fresh air motor.
Optionally, the first resistor is a sliding varistor, the sliding varistor includes an adjusting end, a first end and a second end, the first end of the sliding varistor is the first end of the first resistor, and the second end of the sliding varistor is the second end of the first resistor; the adjustment end is connected with the first end of the slide rheostat.
Optionally, the switching element is a triode; the base electrode of the triode is the control end of the switch element, the collector electrode of the triode is the first end of the switch element, and the emission of the triode is the second end of the switch element.
Optionally, the relay further comprises a first diode, an anode of the first diode is connected with the first contact of the relay, and a cathode of the first diode is connected with the second contact of the relay.
Optionally, the timer further includes a second resistor and a third resistor, where the second resistor is disposed between the control terminal of the switching element and the output terminal of the timer; the third resistor is provided between the control terminal of the switching element and ground.
Optionally, the power supply further comprises a voltage conversion circuit, an input end of the voltage conversion circuit is connected with a 220V power supply, and an output end of the voltage conversion circuit is connected with the first end of the first resistor;
the voltage conversion circuit is used for converting a 220V power supply into a 5V direct current power supply.
Optionally, the voltage conversion circuit includes a voltage reduction circuit, a rectification circuit, a voltage stabilizing circuit, and a filter circuit, which are connected in sequence.
In a second aspect, the present invention provides an electric wire, including input, output and as in any one of the above, new fan switching control circuit, the input with the first end of first resistance is connected, the output with a pair of contact connection of relay.
A third aspect, the utility model provides a new fan, include new trend motor, switching button and as above-mentioned electric wire, the input of electric wire with switching button connects, the output of electric wire with new trend motor's supply circuit connects.
In the embodiment of the application, the charging current of the first capacitor is controlled by the first resistor, the voltages at two ends of the first capacitor are used as the input voltage of the timer, the timer is used for realizing the jump of the output level, the switch element is controlled to be turned off according to the level output by the timer, and the power supply circuit of the fresh air motor is switched on by the suction of the relay contact, so that the fresh air motor is started in a delayed mode, the situation that unfiltered fresh air flows backwards from the air exhaust duct into the room to influence the indoor air cleaning degree is avoided, and the novel air conditioner has the characteristics of simple structure and low cost.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a circuit diagram of a new fan switching control circuit in an exemplary embodiment of the present invention;
fig. 2 is a circuit diagram of a new fan switching control circuit in another exemplary embodiment of the present invention;
fig. 3 is a schematic diagram of an electrical wire according to an exemplary embodiment of the present invention;
fig. 4 is a schematic structural diagram of a new fan according to an exemplary embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a new fan switching control circuit, include: a first resistor RW, a first capacitor C, a timer U1, a switching element Q1, and a relay RY 1;
a high trigger terminal TH of the timer U1 is respectively connected with a second terminal of the first resistor RW and a first terminal of the first capacitor C, and a low trigger terminal/TR of the timer is connected with the high trigger terminal TH;
the first end of the first resistor RW is connected with a power supply, and the second end of the first capacitor C is grounded;
the switching element Q1 includes a control terminal, a first terminal, and a second terminal; a first terminal of the switching element Q1 is connected to the relay coil, a second terminal of the switching element Q1 is grounded, and a control terminal of the switching element Q1 is connected to an output terminal Vout of the timer U1;
and a pair of contacts of the relay RY1 is connected with a power supply circuit of the fresh air motor.
The timer is used for converting the changed voltage waveform into rectangular pulse, the timer is provided with a trigger threshold, and when the input voltage of the timer reaches the trigger threshold, the output level of the output end of the timer jumps, so that the changed voltage waveform is converted into the rectangular pulse.
The timer is provided with a trigger threshold 1/3VCC, and when the input voltage of the timer reaches the trigger threshold, the output level of the output terminal Vout of the timer jumps. Specifically, VCC is a supply voltage of the timer, and when the input voltage is less than the trigger threshold 1/3VCC, the output terminal Vout of the timer outputs a high level, and when the input voltage is higher than the trigger threshold 1/3VCC, the output terminal Vout of the timer outputs a low level.
The first resistor RW is used for adjusting the charging current of the first capacitor C, wherein the larger the resistance value of the first resistor RW is, the larger the charging current passing through the first capacitor C is, the higher the voltage rising speed of the two ends of the first capacitor C is, and the time from the rising of the input voltage of the timer to the trigger threshold 1/3VCC is realized by controlling the first resistor and the first capacitor, so that the timer is controlled to delay and output a low level.
Specifically, the resistance value of the first resistor RW and the capacitance value of the first capacitor C may be set according to a delay time required by a user, and satisfy the following relationship:
τ＝1.1RC
wherein τ is the delay time, R is the resistance of the first resistor RW, and C is the capacitance of the first capacitor C.
When the resistance value of the first resistor RW is smaller, the current for charging the capacitor C is larger, the voltage at the two ends of the capacitor C reaches the second trigger threshold of the timer faster, and the output end Vout of the timer can be changed from the high level to the low level through a shorter time; when the resistance value of the first resistor RW is large, the current for charging the capacitor C is small, the voltage at two ends of the capacitor C slowly reaches the second trigger threshold of the timer, the high level of the output end Vout of the timer can be changed into the low level after a long time, and the delay output requirements of different application scenarios for switching the new fan can be met by setting the resistance value of the first resistor RW.
The switching element Q1 may be a switching element having the functions described in the present application, such as a transistor, a field effect transistor, or a relay.
The relay RY1 comprises a normally open contact, a normally closed contact and a common contact, and the normally closed contact and the common contact of the relay are connected with a power supply circuit of the fresh air motor.
In the embodiment of the application, the working process of the new fan switching control circuit is as follows:
when the novel air conditioner is just electrified, the voltage at two ends of the capacitor C is lower than a trigger threshold value 1/3VCC, the voltages on the pins of the high trigger end TH and the low trigger end/TR of the timer are both lower than 1/3VCC, the output end Vout of the timer is high level, the switching device Q1 is switched on, the common contact of the relay RY1 is connected with the normally open contact, and at the moment, the power supply circuit of the novel air motor is disconnected. When the voltage at the two ends of the first capacitor C is delayed for a period of time and is greater than or equal to 1/3VCC, the Vout pin of the timer turns over to be low level, the triode Q1 is cut off, the common contact of the relay RY1 is disconnected with the normally open contact, the common contact of the relay RY1 is connected with the normally closed contact, and at the moment, the power supply circuit of the fresh air motor is switched on. When the input power supply is not powered off, the voltage at the two ends of the first capacitor C is charged to be equal to VCC and then the charging is stopped, the state of the output end Vout of the timer is kept unchanged, and the power supply circuit of the fresh air motor is always kept in a connected state; if the input voltage is powered off, the first capacitor C discharges through the first resistor R1 and returns to 0V again until the first capacitor C starts to charge again after the power is supplied next time, and the power supply circuit of the fresh air motor is switched on after time delay.
In the embodiment of the application, the charging current of the first capacitor is controlled by the first resistor, the voltages at two ends of the first capacitor are used as the input voltage of the timer, the timer is used for realizing the jump of the output level, the switch element is controlled to be turned off according to the level output by the timer, and the power supply circuit of the fresh air motor is switched on by the suction of the relay contact, so that the fresh air motor is started in a delayed mode, the situation that unfiltered fresh air flows backwards from the air exhaust duct into the room to influence the indoor air cleaning degree is avoided, and the novel air conditioner has the characteristics of simple structure and low cost.
As shown in fig. 2, in an exemplary embodiment, the timer U1 is a 555 timer, a ground terminal GND of the 555 timer is grounded, a power supply terminal VCC is connected to a 5V power supply, a Reset terminal Reset of the 555 timer is connected to the 5V power supply through a pull-up resistor R1 to keep the 555 timer in a high level state, a voltage control terminal Vc of the 555 timer is grounded through a capacitor C3, and the capacitor C3 plays a role in filtering to eliminate interference and ensure stability of a reference level of the 555 timer.
The first resistor RW is a sliding rheostat, the sliding rheostat includes an adjusting end, a first end and a second end, the first end of the sliding rheostat is the first end of the first resistor, and the second end of the sliding rheostat is the second end of the first resistor; the adjustment end is connected with the first end of the slide rheostat.
The switching element Q1 is a triode; the base of the triode is the control end of the switching element, the collector of the triode is the first end of the switching element Q1, and the emitter of the triode is the second end of the switching element Q1.
Preferably, the fresh air machine switching control circuit further comprises a diode D3, a resistor R4 and a resistor R5, wherein the anode of the diode D3 is connected with the first contact of the relay, the cathode of the diode D3 is connected with the second contact of the relay, and the diode D3 is used for consuming induced electromotive force generated by a relay coil when the switch element is turned off, so that the reliability of the circuit is improved.
The resistor R4 is arranged between the control terminal of the switching element Q1 and the output terminal Vout of the timer; the resistor R5 is disposed between the control terminal of the switching element Q1 and ground.
In an exemplary embodiment, the fresh air fan switching control circuit further comprises a voltage conversion circuit, an input end of the voltage conversion circuit is connected with a 220V power supply, and an output end of the voltage conversion circuit is connected with a first end of the first resistor; the voltage conversion circuit is used for converting a 220V power supply into a 5V direct current power supply.
The voltage conversion circuit may be any one of the voltage conversion circuits in the related art that satisfies the above-described function.
In one embodiment, the voltage conversion circuit comprises a voltage reduction circuit 1, a rectification circuit 2, a voltage stabilizing circuit 3 and a filter circuit 4 which are connected in sequence;
the voltage reduction circuit 1 comprises a resistor R2, a resistor R3 and a capacitor C5, wherein a first end of the resistor R2 is connected with a first end of a resistor R3 and a first end of a capacitor C5 respectively, and a second end of the resistor R3 is connected with a second end of a capacitor C5.
The rectifying circuit 2 comprises a diode D1 and a diode D2, the anode of the diode D1 is connected with the second end of the resistor R2 and the cathode of the diode D2 respectively, and the anode of the diode D2 is grounded;
the voltage stabilizing circuit 3 comprises a voltage stabilizing diode ZD, the anode of the voltage stabilizing diode ZD is grounded, and the cathode of the voltage stabilizing diode ZD is connected with the cathode of a diode D1.
The filter circuit comprises an electrolytic capacitor EC1 and a capacitor C1, wherein the anode of the electrolytic capacitor EC1 is respectively connected with the anode of the capacitor C1 and the first end of the first resistor RW, and the cathode of the electrolytic capacitor EC1 and the cathode of the capacitor C1 are grounded.
As shown in fig. 3, an electric wire is further provided in the embodiment of the present application, and includes an input terminal 10, an output terminal 20, and the new fan switching control circuit 30 as described in any one of the above, where the input terminal 10 is connected to a first terminal of the first resistor, and the output terminal 20 is connected to a pair of contacts of the relay.
The electric wire is simple in structure, low in cost, simple in installation and wiring and capable of being used in multiple occasions needing time delay output control.
As shown in fig. 4, the embodiment of the present application further provides a new air blower, which includes a switch button 100, the electric wire 200 and the new air motor 300, wherein the input end of the electric wire 200 is connected to the switch button 100, and the output end of the electric wire 200 is connected to the power supply circuit of the new air motor 300.
The new fan has low cost, simple structure inside the new fan, small installation space and higher market prospect.
It should be understood that the embodiments described are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.
Claims (9)
1. A new fan switches control circuit, its characterized in that includes: the circuit comprises a first resistor, a first capacitor, a timer, a switching element and a relay;
the high trigger end of the timer is respectively connected with the second end of the first resistor and the first end of the first capacitor, and the low trigger end of the timer is connected with the high trigger end;
the first end of the first resistor is connected with a power supply, and the second end of the first capacitor is grounded;
the switching element comprises a control terminal, a first terminal and a second terminal; the first end of the switch element is connected with the relay coil, the second end of the switch element is grounded, and the control end of the switch element is connected with the output end of the timer;
and a pair of contacts of the relay is connected with a power supply circuit of the fresh air motor.
2. The new fan switching control circuit according to claim 1, characterized in that: the first resistor is a slide rheostat which comprises an adjusting end, a first end and a second end, the first end of the slide rheostat is the first end of the first resistor, and the second end of the slide rheostat is the second end of the first resistor; the adjustment end is connected with the first end of the slide rheostat.
3. The new fan switching control circuit according to claim 1, wherein the switching element is a triode; the base electrode of the triode is the control end of the switch element, the collector electrode of the triode is the first end of the switch element, and the emission of the triode is the second end of the switch element.
4. The new fan switching control circuit according to claim 1, characterized in that: the relay further comprises a first diode, wherein the anode of the first diode is connected with the first contact of the relay, and the cathode of the first diode is connected with the second contact of the relay.
5. The new fan switching control circuit according to claim 1, further comprising a second resistor and a third resistor, the second resistor being disposed between the control terminal of the switching element and the output terminal of the timer; the third resistor is provided between the control terminal of the switching element and ground.
6. The new fan switching control circuit according to any one of claims 1 to 5, wherein: the input end of the voltage conversion circuit is connected with a 220V power supply, and the output end of the voltage conversion circuit is connected with the first end of the first resistor;
the voltage conversion circuit is used for converting a 220V power supply into a 5V direct current power supply.
7. The new fan switching control circuit according to claim 6, wherein: the voltage conversion circuit comprises a voltage reduction circuit, a rectification circuit, a voltage stabilizing circuit and a filter circuit which are connected in sequence.
8. An electrical wire, characterized by: comprising an input connected to a first terminal of the first resistor, an output connected to a pair of contacts of the relay, and the new fan switching control circuit of any one of claims 1-7.
9. A new fan which characterized in that: comprising a fresh air motor, a switching button and a wire according to claim 8, wherein the input end of the wire is connected with the switching button, and the output end of the wire is connected with a power supply circuit of the fresh air motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022515002.8U CN213873096U (en) | 2020-11-03 | 2020-11-03 | New fan switching control circuit, electric wire and new fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022515002.8U CN213873096U (en) | 2020-11-03 | 2020-11-03 | New fan switching control circuit, electric wire and new fan |
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| CN213873096U true CN213873096U (en) | 2021-08-03 |
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| CN202022515002.8U Active CN213873096U (en) | 2020-11-03 | 2020-11-03 | New fan switching control circuit, electric wire and new fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114189164A (en) * | 2021-12-08 | 2022-03-15 | 浙江华章科技有限公司 | Head box valve cleaning control system |
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2020
- 2020-11-03 CN CN202022515002.8U patent/CN213873096U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114189164A (en) * | 2021-12-08 | 2022-03-15 | 浙江华章科技有限公司 | Head box valve cleaning control system |
| CN114189164B (en) * | 2021-12-08 | 2023-10-27 | 浙江华章科技有限公司 | Head box valve washs control system |
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