CN219306571U - Electric heating towel rack - Google Patents

Abstract

The utility model discloses an electric heating towel rack, which comprises a towel rack main body, a heating wire, a power input end and an analog control circuit. The heating wire is arranged on the towel rack main body, the analog control circuit comprises a switch circuit and a driving signal setting circuit, the input end of the switch circuit is connected with the power input end, the output end of the switch circuit is connected with the heating wire, the controlled end of the switch circuit is electrically connected with the driving signal setting circuit, and the analog control circuit is arranged in the towel rack main body. The utility model aims to enable the electric towel rack to be compatible with different heating temperatures.

Description

Electric heating towel rack

Technical Field

The utility model relates to the technical field of electric towel racks, in particular to an electric towel rack.

Background

In order to meet the requirements of users for electric towel racks with different size patterns and heating temperatures, manufacturers often design a plurality of electric towel racks with different temperature specifications, and the electric towel racks with different temperature specifications can adopt heating wires with different powers and corresponding circuit modules. For manufacturers, the electric towel rack with any one temperature specification cannot be compatible with other temperature gears, so that heating wires with different powers are required to be stored and stored during production, and the difficulty of production and management is increased.

Disclosure of Invention

The utility model mainly aims to provide an electric heating towel rack, which aims to realize compatibility of different heating temperatures.

To achieve the above object, the present utility model provides an electric towel rack comprising:

a towel rack main body;

the heating wire is arranged on the towel rack main body;

the power supply input end is used for accessing power supply voltage;

the analog control circuit comprises a switch circuit and a driving signal setting circuit, wherein the input end of the switch circuit is connected with the power input end, the output end of the switch circuit is connected with the heating wire, and the controlled end of the switch circuit is electrically connected with the driving signal setting circuit; the analog control circuit is arranged in the towel rack main body;

the driving signal setting circuit is used for outputting corresponding driving signals to the controlled end of the switch circuit when the driving signal setting circuit is triggered by a user;

the switching circuit is used for carrying out voltage conversion on the accessed power supply voltage according to the driving signal and outputting the converted power supply voltage to the heating wire so as to enable the heating wire to be kept in a preset temperature interval corresponding to the driving signal.

Optionally, the switching circuit includes a first switching tube; the drive signal setting circuit includes:

the second end of the driving capacitor is connected with the output end of the first switching tube;

the input end of the charging current setting circuit is connected with the power input end, and the output end of the charging current setting circuit is connected with the first end of the driving capacitor;

the charging current setting circuit is used for outputting a charging current with a corresponding current value to the driving capacitor when the charging current setting circuit is triggered by a user so as to charge the driving capacitor;

the conduction trigger circuit is respectively connected with the first end of the driving capacitor and the controlled end of the first switching tube;

the conduction trigger circuit is used for conducting a passage between the first end of the driving capacitor and the controlled end of the first switching tube when the voltage of the first end of the driving capacitor reaches a preset conduction voltage so as to enable the first switching tube to be in a conduction state; and the switching device is also used for switching off a passage between the first end of the driving capacitor and the controlled end of the first switching tube when the voltage of the first end of the driving capacitor does not reach the preset on voltage so as to enable the first switching tube to be in an off state.

Optionally, the charging current setting circuit includes:

the input end of the potentiometer is connected with the power input end, and the output end of the potentiometer is connected with the first end of the driving capacitor;

the potentiometer is used for correspondingly changing the resistance value of the potentiometer when the potentiometer is triggered by a user, so that the power input end outputs charging current with a corresponding current value to the driving capacitor.

Optionally, the on trigger circuit includes: the first diac, the first resistor; the first end of the first diac is connected with the controlled end of the first switch tube, and the second end of the first diac is connected with the first end of the driving capacitor through the first resistor.

Optionally, the analog control circuit further includes:

the current limiting circuit is connected in series on a path between the power input end and the input end of the charging current setting circuit;

the current limiting circuit is used for limiting the current value of the charging current output by the charging current setting circuit to be below a preset current limiting current value.

Optionally, the analog control circuit further includes:

the first end of the lightning protection circuit is electrically connected with the input end of the switch circuit, and the second end of the lightning protection circuit is electrically connected with the output end of the switch circuit.

Optionally, the analog control circuit further includes:

and the first end of the filter circuit is electrically connected with the input end of the switch circuit, and the second end of the filter circuit is electrically connected with the output end of the switch circuit.

Optionally, the electric heating towel rack further comprises:

the switch trigger circuit is connected in series on a path between the power input end and the input end of the switch circuit;

the switch trigger circuit is used for switching on or off a path between the power input end and the input end of the switch circuit when triggered by a user.

Optionally, the electric heating towel rack further comprises:

the temperature control switch circuit is connected in series on a passage between the output end of the switch circuit and the heating wire;

the temperature control switch circuit is used for detecting the temperature of the heating wire and disconnecting a passage between the output end of the switch circuit and the heating wire when the temperature of the heating wire reaches a preset alarm temperature.

Optionally, the electric heating towel rack further comprises:

one end of each airing rod is connected with the towel rack main body, and the other end of each airing rod is arranged in an extending way back to the towel rack main body;

the heating wires comprise at least one sub heating wire which is sequentially connected in series, and each airing rod is provided with at least one sub heating wire; or alternatively, the process may be performed,

the number of heating wires and the number of the analog control circuits are N (N is larger than 1), and at least one heating wire is arranged in each airing rod.

The electric heating towel rack comprises a towel rack main body, a heating wire, a power input end and an analog control circuit. The analog control circuit comprises a switch circuit and a drive signal setting circuit, wherein the drive signal setting circuit is used for outputting a corresponding drive signal to a controlled end of the switch circuit when triggered by a user, and the switch circuit is used for carrying out voltage conversion on an accessed power supply voltage according to the drive signal and then outputting the converted power supply voltage to the heating wire so as to enable the heating wire to be kept in a preset temperature interval corresponding to the drive signal. Through the arrangement, the same electric heating towel rack can be compatible with different heating temperatures, so that in the actual production process, heating wires with the same power can be arranged in each electric heating towel rack, and when different heating temperature requirements of the electric heating towel racks with different temperature specifications are met, production staff only need to correspondingly trigger a driving signal setting circuit according to the actual requirements, and the heating wires in the electric heating towel racks can be kept in a preset temperature interval corresponding to the driving signals when the electric heating towel racks are in operation. Therefore, manufacturers do not need to customize heating wires with different powers according to different heating temperature requirements, and also do not need to prepare different temperature control programs according to different heating temperature requirements, so that the production efficiency and the yield of the electric heating towel rack are effectively improved, and the production and storage costs of the electric heating towel rack are reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a circuit module of an embodiment of an electric towel rack according to the present utility model;

FIG. 2 is a schematic circuit block diagram of another embodiment of the electric towel rack of the present utility model;

FIG. 3 is a schematic circuit diagram of an embodiment of the electric towel rack of the present utility model;

FIG. 4 is a schematic circuit diagram of another embodiment of the electric towel rack of the present utility model;

fig. 5 is a schematic structural view of an embodiment of the electric towel rack of the present utility model.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

In order to meet the requirements of users for electric towel racks with different sizes and heating temperatures, manufacturers often design a plurality of electric towel racks with different specifications, the power of heating wires adopted by each electric towel rack is often different, and meanwhile, in order to ensure the heating temperature of the electric towel rack to be stable, a set of temperature control program is required to be independently set for the electric towel racks with different specifications, which adopt the heating wires with different powers. In the actual production process, manufacturers need to customize heating wires with corresponding power and prepare a main controller storing different temperature control programs, so that the situations of wrong ingredients and assembly are easy to occur, the production efficiency of the manufacturers is reduced, and the production and storage costs of the manufacturers are increased.

To this end, the present utility model proposes an electric towel rack, referring to fig. 1, in an embodiment of the electric towel rack of the present utility model, the electric towel rack comprises:

towel rack body 00;

a heating wire 20, wherein the heating wire 20 is arranged on the towel rack main body 00;

the power supply input end is used for accessing power supply voltage;

the analog control circuit 10 comprises a switch circuit 11 and a driving signal setting circuit 12, wherein the input end of the switch circuit 11 is connected with the input end of a power supply, the output end of the switch circuit 11 is connected with the heating wire 20, and the controlled end of the switch circuit 11 is electrically connected with the driving signal setting circuit 12; the analog control circuit 10 is arranged in the towel rack main body 00;

a driving signal setting circuit 12 for outputting a corresponding driving signal to the controlled end of the switch circuit 11 when triggered by a user;

the switching circuit 11 is configured to perform voltage conversion on the connected power supply voltage according to the driving signal, and output the converted power supply voltage to the heating wire 20, so that the heating wire 20 is maintained in a preset temperature interval corresponding to the driving signal.

In this embodiment, the power input may alternatively be implemented using ase:Sub>A plug, such as ase:Sub>A three-pin plug, ase:Sub>A two-pin plug, ase:Sub>A USB-A plug, ase:Sub>A USB-B plug, ase:Sub>A USB-C plug, or the like. It will be appreciated that the power supply voltage to which the power supply input is connected may be an alternating current, for example the power supply input is a three-pin plug for insertion into a socket to connect to a mains voltage. Or the power supply voltage connected to the power supply input terminal is a direct current voltage.

In this embodiment, the switching circuit 11 may alternatively be implemented with a switching transistor, such as a MOS transistor, an IGBT power transistor, a thyristor, or a switching device, such as a relay.

Alternatively, in an embodiment, referring to fig. 2, the switching circuit 11 includes a first switching tube; the driving signal setting circuit 12 includes a driving capacitor 121, a charging current setting circuit 122, and a conducting trigger circuit 123, and a second end of the driving capacitor 121 is connected to an output end of the first switching tube. An input terminal of the charging current setting circuit 122 is connected to a power supply input terminal, and an output terminal of the charging current setting circuit 122 is connected to a first terminal of the driving capacitor 121. The on trigger circuit 123 is connected to the first terminal of the driving capacitor 121 and the controlled terminal of the first switching tube, respectively. The charging current setting circuit 122 is configured to output a charging current of a corresponding current value to the driving capacitor 121 when triggered by a user, so as to charge the driving capacitor 121. The turn-on trigger circuit 123 is configured to turn on a path between the first terminal of the driving capacitor 121 and the controlled terminal of the first switching tube when the voltage at the first terminal of the driving capacitor 121 reaches a preset turn-on voltage, so that the first switching tube is in a turned-on state. And the circuit is further configured to disconnect the path between the first end of the driving capacitor 121 and the controlled end of the first switching tube when the voltage at the first end of the driving capacitor 121 does not reach the preset on voltage, so that the first switching tube is in an off state.

In this embodiment, alternatively, the charging current setting circuit 122 may be implemented by using a constant current chip and its peripheral circuit, and the producer may implement adjustment of the current value of the charging current output by the constant current chip by changing the resistance value of the current setting resistor in the peripheral circuit of the constant current chip. Alternatively, the charging current setting circuit 122 may also be implemented directly by using an adjustable resistor component, such as a potentiometer, and the producer may adjust the resistance of the adjustable resistor component, thereby adjusting the current value of the charging current flowing through the adjustable resistor component. It can be understood that, in the actual operation process of the electric towel rack, that is, when the charging current setting circuit 122 receives the power voltage, a charging current with a corresponding current value is generated to the driving capacitor 121 to charge the driving capacitor 121. The magnitude of the current value of the charging current determines the charging speed of the driving capacitor 121, and the greater the current value, the faster the charging speed of the driving capacitor 121. When the voltage value of the driving capacitor 121 reaches the preset turn-on voltage of the turn-on trigger circuit 123, the turn-on trigger circuit 123 turns on the path between the first end of the driving capacitor 121 and the controlled end of the first switching tube. At this time, the driving capacitor 121 outputs a driving signal to the controlled end of the first switching tube in the switching circuit 11 (the driving capacitor 121 is discharging), so that the first switching tube is in a conducting state, and the power voltage connected to the power access end is output to the heating wire 20 through the first switching tube at this time, so that the heating wire 20 starts to work. Meanwhile, the first switching tube in the conducting state also shorts the charging current setting circuit 122 and the driving capacitor 121, that is, the charging current setting circuit 122 will not output the charging current to charge the driving capacitor 121, and the driving capacitor 121 will be continuously in the discharging state to output the driving signal to keep the first switching tube in the conducting state. When the voltage of the driving capacitor 121 decreases below the preset turn-on voltage, the turn-on trigger circuit 123 will disconnect the path between the first end of the driving capacitor 121 and the controlled end of the first switching tube, that is, the first switching tube will not receive the driving signal output by the driving capacitor 121 at this time, and will be in an off state, so as to disconnect the path between the power input end and the heating wire 20, and the heating wire 20 will not work. At this time, the charging current setting circuit 122 restarts outputting the charging current to charge the driving capacitor 121, and repeats the above-described process. In this way, in the actual production process, the producer only needs to adjust the current to be output by the charging current setting circuit 122 according to the heating temperature requirement of the electric heating towel rack to be produced currently, so that the duty ratio of the driving signal output by the driving capacitor 121 to the first switching tube can be adjusted, so that the first switching tube can keep the heating wire 20 in the preset temperature interval corresponding to the driving signal in the working process according to the driving signal, manufacturers do not need to customize the heating wires 20 with different powers according to different heating temperature requirements, and also do not need to prepare different temperature control programs according to different heating temperature requirements, thereby effectively improving the production efficiency and yield of the electric heating towel rack and reducing the production and storage costs of the electric heating towel rack. It can be understood that, during the development, a developer may undergo a lot of experiments to obtain the duty ratio of the driving signal corresponding to each heating temperature and the current value of the charging current corresponding to the duty ratio, and form a corresponding production operation manual for the developer to operate during production.

Alternatively, in another embodiment, the driving signal setting circuit 12 may be implemented by using a main controller and a trigger component, such as a touch screen, a trigger button. The developer may form a heating temperature-duty cycle map based on the above test and pre-store it in the main controller. Therefore, in the production process, production personnel only need to control the trigger assembly to input the required heating temperature, the main controller can determine the heating temperature required by the current electric heating towel rack according to the output result of the trigger assembly, and the driving signal of the corresponding duty ratio is called according to the heating temperature-duty ratio mapping table. Thus, when the electric towel rack works, the main controller outputs a driving signal with a corresponding duty ratio to the switch circuit 11, so that the switch circuit 11 performs voltage conversion on the connected power voltage and outputs the converted power voltage to the heating wire 20, and the heating wire 20 is kept in a preset temperature interval corresponding to the driving signal.

The electric heating towel rack comprises a towel rack main body 00, a heating wire 20, a power input end and an analog control circuit 10. The analog control circuit 10 includes a switch circuit 11 and a driving signal setting circuit 12, wherein the driving signal setting circuit 12 is configured to output a corresponding driving signal to a controlled end of the switch circuit 11 when triggered by a user, and the switch circuit 11 is configured to perform voltage conversion on an accessed power supply voltage according to the driving signal and output the converted power supply voltage to the heating wire 20, so that the heating wire 20 is kept in a preset temperature interval corresponding to the driving signal. Through the arrangement, the same electric heating towel rack can be compatible with different heating temperatures, so that in the actual production process, heating wires with the same power can be arranged in each electric heating towel rack, and when different heating temperature requirements of the electric heating towel racks with different temperature specifications are met, production staff only need to correspondingly trigger the driving signal setting circuit 12 according to the actual requirements, and the heating wires in the electric heating towel racks can be kept in a preset temperature interval corresponding to the driving signals when the electric heating towel racks are in operation. Therefore, manufacturers do not need to customize heating wires with different powers according to different heating temperature requirements, and also do not need to prepare different temperature control programs according to different heating temperature requirements, so that the production efficiency and the yield of the electric heating towel rack are effectively improved, and the production and storage costs of the electric heating towel rack are reduced.

Referring to fig. 3, in an embodiment of the present utility model, the charging current setting circuit 122 includes:

the input end of the potentiometer RT1 is connected with the power input end, and the output end of the potentiometer RT1 is connected with the first end of the driving capacitor 121;

the potentiometer RT1 is configured to correspondingly change its resistance value when triggered by a user, so that the power input end outputs a charging current with a corresponding current value to the driving capacitor 121. The input end of the potentiometer RT1 is the input end of the charging current setting circuit 122, and the output end of the potentiometer RT1 is the output end of the charging current setting circuit 122.

The on trigger circuit 123 includes: the first diac D1 and the first resistor R1; the first end of the first diac D1 is connected to the controlled end of the first switch Q1, and the second end of the first diac D1 is connected to the first end of the driving capacitor 121C1 through the first resistor R1.

Specifically, referring to fig. 3, in this embodiment, the first switching tube Q1 is taken as a silicon controlled rectifier, the power supply voltage is a mains voltage, the power supply input end includes a live wire end L and a neutral wire end N, the driving capacitor 121 includes a first capacitor C1, and the first end of the potentiometer RT1 is connected to the live wire end L for illustration.

In the production process, production personnel can adjust the potentiometer to corresponding resistance according to the heating temperature requirement of the actual electric heating towel rack. In this way, during the operation of the electric towel rack, that is, when the power supply voltage is applied, the power supply voltage passing through the second resistor R2 and the potentiometer RT1 in the current limiting circuit 13 in the embodiment described below will charge the first capacitor C1 according to the resistance values of the second resistor R2 and the potentiometer RT1 and the charging current value that generates the corresponding current value. When the voltage of the first capacitor C1 reaches the conducting voltage of the first diac D1, the controlled end of the first switching tube Q1 is conducted with the first end of the first capacitor C1. At this time, the first switching tube Q1 is triggered to be turned on to turn on the path between the wire end L and the heating wire 20 so that the heating wire 20 starts to generate heat. Meanwhile, the first switch tube Q1 in the on state will short-circuit the second resistor R2, the first resistor R1 and the first capacitor C1, i.e. no charging current will charge the first capacitor C1 at this time, the first capacitor C1 will continuously discharge to maintain the on state of the first switch tube Q1, when the voltage of the first capacitor C1 is lower than the on voltage of the first diac D1, the first diac D1 will disconnect the path between the controlled end of the first switch tube Q1 and the first capacitor C1, at this time, the first switch tube Q1 will be in the off state, and the power voltage will pass through the second resistor R2 and the potentiometer RT1 again to charge the first capacitor C1, and repeat the above processes in sequence. In this way, in the actual production process, the producer only needs to set the resistance value of the potentiometer, and can make the first capacitor C1 output the driving signal with the corresponding duty ratio to the first switching tube Q1, so that when the first switching tube Q1 works according to the driving signal with the corresponding duty ratio, the power supply voltage which is connected is output to the heating wire 20 after voltage conversion, so that the heating wire 20 is kept in the preset temperature interval corresponding to the driving signal, thereby effectively improving the production efficiency and yield of the electric towel rack and reducing the production and storage costs of the electric towel rack. Meanwhile, as the driving signals with different duty ratios are generated by adopting the pure hardware circuit, compared with the technical means of adopting the main controller, the generated driving signals are more accurate, the circuit architecture cost is lower, and the production cost is reduced while the working stability and reliability of the electric towel rack are effectively improved.

It should be understood that, as is clear from the above description, the charging speed of the driving capacitor 121 depends on the magnitude of the charging current output to the driving capacitor 121 by the charging setting circuit. If the charging setting circuit fails, the output charging current will have too high a current value, or if the charging setting circuit is set to output charging current by a manufacturer and the charging setting circuit is operated by mistake, the output charging current will have too high a current value, which will damage the driving capacitor 121.

To this end, referring to fig. 3, in an embodiment of the present utility model, the analog control circuit 10 further includes:

a current limiting circuit 13, the current limiting circuit 13 being connected in series in a path between the power supply input terminal and the input terminal of the charging current setting circuit 122;

the current limiting circuit 13 is configured to limit the current value of the charging current output by the charging current setting circuit 122 to be less than a preset current limiting current value.

In this embodiment, alternatively, the current limiting circuit 13 may be implemented by a current limiting chip, and the current limiting chip may limit the current value of the charging current output by the charging current setting circuit 122 below a preset current limiting current value (determined by the type of the current limiting chip). Alternatively, the current limiting circuit 13 may also be implemented directly by using a load, such as a resistor, connected in series with the charging current setting circuit 122 through the resistor, so as to limit the current value of the output charging current below the preset current limiting current value.

Specifically, referring to fig. 3, in conjunction with the above embodiment, the current limiting circuit 13 includes a second resistor R2, and the second resistor R2 is connected in series between the input terminal of the potentiometer RT1 and the live terminal L of the power input terminal. Thus, the power voltage connected to the power input terminal is outputted to the driving capacitor 121 according to the resistance values of the second resistor R2 and the potentiometer RT1 and the generated corresponding charging current. In practical application, the magnitude of the charging current output to the driving capacitor 121 is always smaller than or equal to the preset current value no matter how the resistance of the potentiometer RT1 is adjusted, so that the safety and reliability of the operation of the driving capacitor 121 are effectively ensured, and the safety and reliability of the operation of the electric towel rack are further ensured.

It should be understood that, in practical applications, if the power supply voltage connected to the power supply access terminal fluctuates, for example, the voltage suddenly increases, the excessively high voltage may affect the analog control circuit 10, which may further affect the reliability and stability of the operation of the electric towel rack.

To this end, referring to fig. 3, in an embodiment of the present utility model, the analog control circuit 10 further includes:

the first end of the lightning protection circuit 14 is electrically connected with the input end of the switch circuit 11, and the second end of the lightning protection circuit 14 is electrically connected with the output end of the switch circuit 11.

In this embodiment, the lightning protection circuit 14 may alternatively be implemented using TVS tubes, ESD tubes, piezoresistors, or the like. The lightning protection circuit 14 may clamp the voltage between the input and output of the switching circuit 11 within a preset voltage range (determined by the device type of the lightning protection circuit 14). Thus, in practical application, if the power supply voltage accessed by the power supply input end fluctuates to cause the voltage output to the switch circuit 11 to be too high, the lightning protection circuit 14 clamps the voltage between the input end and the output end of the switch circuit 11 within a preset voltage range, so that the influence of the too high voltage on the switch circuit 11 or other later-stage circuits is prevented, and the working stability and reliability of the electric towel rack are improved.

Specifically, referring to fig. 3, the lightning protection circuit 14 may be implemented by using a varistor RZ1, where a first end of the varistor RZ1 is connected to the input terminal of the first switching tube Q1, and a second end of the varistor RZ1 is connected to the output terminal of the first switching tube Q1.

Referring to fig. 3, in an embodiment of the present utility model, the analog control circuit 10 further includes:

the first end of the filter circuit 15 is electrically connected to the input terminal of the switch circuit 11, and the second end of the filter circuit 15 is electrically connected to the output terminal of the switch circuit 11.

Specifically, in the present embodiment, the filter circuit 15 includes a third resistor R3 and a second capacitor C2, where a first end of the third resistor R3 is connected to the input end of the first switching tube Q1, a second end of the third resistor R3 is connected to the first end of the second capacitor C2, and a second end of the second capacitor C2 is connected to the output end of the first switching tube Q1.

In this embodiment, it is understood that when the power input terminal is connected to the power voltage, the power voltage often has a high-frequency interference signal. For example, when the power input is the mains supply supplied by the power grid, the mains supply is often accompanied by high-frequency interference signals. The resistance-capacitance absorption circuit formed by the third resistor R3 and the second capacitor C2 is used as the filter circuit 15, so that the high-frequency interference signal can be consumed on the third resistor R3 after passing through the second capacitor C2, thereby effectively reducing the component of the interference signal in the power supply voltage, effectively ensuring the reliability and stability of the operation of the analog control circuit 10, and further effectively improving the reliability and stability of the operation of the electric towel rack.

Referring to fig. 4, in an embodiment of the present utility model, the electric towel rack further includes:

a switch trigger circuit 30, the switch trigger circuit 30 being connected in series on a path between the power supply input terminal and the input terminal of the switch circuit 11;

the switch triggering circuit 30 is used for switching on or off a path between the power input terminal and the input terminal of the switch circuit 11 when triggered by a user.

In this embodiment, the switch triggering circuit 30 may alternatively be implemented using a single physical switch, such as a toggle switch, a push button switch. When the user activates the physical switch, the physical switch may turn on or off the path between the power supply input and the input of the switching circuit 11.

Alternatively, in another embodiment, the switch triggering circuit 30 may be implemented by using a switching circuit 11 composed of a trigger, a switch and a controller, where the trigger may be implemented by using a key, a trigger, a touch key, etc., and the switch is connected in series to a path between the power input terminal and the input terminal of the switching circuit 11. When the user triggers the trigger piece, the trigger piece outputs a corresponding trigger signal to the main controller, and the main controller controls the switch to turn on or off a passage between the power input end and the input end of the switch circuit 11 according to the trigger signal.

Specifically, referring to fig. 3, the switch trigger circuit 30 may be connected in series in the path between the live terminal L of the power input terminal and the input terminal of the switch circuit 11, or in series in the path between the neutral terminal N of the power input terminal and the heating wire 20, or in series in the path between the heating wire 20 and the output terminal of the switch circuit 11.

Thus, through the arrangement, when the electric heating towel rack is used by a user, the user does not need to repeatedly connect the power input end into the socket, and the electric heating towel rack can be switched between the heating working state and the stopping working state only by triggering the switch triggering circuit 30 according to the requirements, so that the convenience of the user in using the electric heating towel rack is improved.

Referring to fig. 4, in an embodiment of the present utility model, the electric towel rack further includes:

the temperature control switch circuit 40, the temperature control switch circuit 40 is connected in series on the way between the output end of the switch circuit 11 and the heating wire 20;

the temperature control switch circuit 40 is used for detecting the temperature of the heating wire 20, and disconnecting the path between the output end of the switch circuit 11 and the heating wire 20 when the temperature of the heating wire 20 reaches the preset alarm temperature.

In this embodiment, the temperature control switch circuit 40 may be implemented by a temperature control switch, which may be disposed near the heating wire 20. If the current analog control circuit 10 fails, resulting in the normally-on state of the switch circuit 11 therein, the heating wire 20 will always be in a heating state, so as to gradually increase its temperature, unlike the above embodiment, and remain in a preset temperature range, when the temperature of the heating wire 20 reaches the preset alarm temperature, the temperature control switch will disconnect the path between the output end of the switch circuit 11 and the heating wire 20, so as to stop the heating wire 20 from continuing to heat, and prevent the heating wire 20 continuously increasing in temperature from damaging the electric towel rack. The preset alarm temperature is determined by the type of the temperature control switch, and a researcher can select the temperature control switch with the corresponding type according to actual requirements to set the preset alarm temperature.

Alternatively, in another embodiment, the temperature control switch circuit 40 may also be implemented by a temperature detection sensing component, which may be implemented by a voltage dividing circuit formed by a thermistor, an infrared sensor, or the like, and a main controller, and a switching tube connected in series to a path between the output end of the switch circuit 11 and the heating wire 20. Taking the temperature detection sensing assembly as an example, a voltage division circuit formed by a thermistor and a voltage division resistor is adopted, the thermistor can be arranged close to the heating wire 20, the main controller can determine the voltage on the thermistor by detecting the voltage on the voltage division resistor, then the resistance of the thermistor is obtained through calculation according to the known resistance of the voltage division resistor, and then the temperature of the current thermistor, namely the temperature of the heating wire 20 detected by the thermistor, is determined according to a preset thermistor resistance-temperature mapping table. When the temperature of the heating wire 20 reaches the preset alarm temperature, the main controller can control the switch to disconnect the passage between the output end of the switch circuit 11 and the heating wire 20, so that the heating wire 20 is stopped from continuously heating, and the heating wire 20 which continuously heats up is prevented from damaging the electric towel rack. The preset alarm temperature can be preset in the main controller in advance by a research and development personnel according to actual requirements.

Thus, through the above arrangement, if the analog control circuit 10 fails to cause the heating wire 20 to be in a working state and continuously heat up in the working process of the electric heating towel rack, the temperature switch circuit 11 can timely disconnect the path between the output end of the switch circuit 11 in the analog control circuit 10 and the heating wire 20 when the heating wire 20 reaches a preset alarm temperature, thereby preventing the heating wire 20 which continuously heats up from damaging the electric heating towel rack itself or a user, and improving the reliability and safety of the use of the electric heating towel rack.

Referring to fig. 5, in an embodiment of the present utility model, the electric towel rack further includes:

one end of each airing rod is connected with the towel rack main body 00, and the other end of each airing rod is arranged in an extending way back to the towel rack main body 00;

the heating wires 20 comprise at least one sub heating wire which is sequentially connected in series, and each airing rod is provided with at least one sub heating wire; or alternatively, the process may be performed,

the number of the heating wires 20 and the number of the analog control circuits 10 are N, and at least one heating wire 20 is arranged in each airing rod, wherein N is larger than 1.

In this embodiment, optionally, when there are multiple airing bars, the lengths of the plurality of airing bars may be different, so as to meet the requirement of hanging towels with different sizes. Alternatively, each airing rod may be rotatably connected to the towel rack body 00, for example, one end of the airing rod is connected to a sleeve, and the sleeve is sleeved on the towel rack body 00 and rotatably connected to the towel rack body 00. In this way, in practical application, the towels hung on the airing rod can be separated from each other and are not contacted, so that the efficiency of heating and drying wet towels is improved.

In this embodiment, alternatively, the heating wire 20 may be formed by connecting a plurality of sub-heating wires in series, and each of the pole developers may set a corresponding number of sub-heating wires therein according to the actual heating requirement and the size specification requirement. Thus, after the user triggers the switch trigger circuit 30, the heating wires 20 in all the airing poles start to heat, so as to heat the towels placed on the airing poles.

Alternatively, in another embodiment, a heating wire 20 and an analog control circuit 10 matched with the heating wire may be separately disposed in each airing rod, and it is understood that a switch triggering circuit 30 in the above embodiment may be further disposed between the analog control circuit 10 and the power input terminal in each airing rod. In practical application, a user can select one or more heating wires 20 in the airing rods to start heating according to the needs of the user, so that the convenience of using the electric towel rack by the user is improved.

The foregoing description of the embodiments of the present utility model is merely an optional embodiment of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structural modifications made by the present utility model in the light of the present utility model, the description of which and the accompanying drawings, or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. An electric towel rack, comprising:

a towel rack main body;

the heating wire is arranged on the towel rack main body;

the power supply input end is used for accessing power supply voltage;

the analog control circuit comprises a switch circuit and a driving signal setting circuit, wherein the input end of the switch circuit is connected with the power input end, the output end of the switch circuit is connected with the heating wire, and the controlled end of the switch circuit is electrically connected with the driving signal setting circuit; the analog control circuit is arranged in the towel rack main body;

the driving signal setting circuit is used for outputting corresponding driving signals to the controlled end of the switch circuit when the driving signal setting circuit is triggered by a user;

the switching circuit is used for carrying out voltage conversion on the accessed power supply voltage according to the driving signal and outputting the converted power supply voltage to the heating wire so as to enable the heating wire to be kept in a preset temperature interval corresponding to the driving signal.

2. The electrically heated towel rail of claim 1 wherein the switching circuit comprises a first switching tube; the drive signal setting circuit includes:

the second end of the driving capacitor is connected with the output end of the first switching tube;

the input end of the charging current setting circuit is connected with the power input end, and the output end of the charging current setting circuit is connected with the first end of the driving capacitor;

the charging current setting circuit is used for outputting a charging current with a corresponding current value to the driving capacitor when the charging current setting circuit is triggered by a user so as to charge the driving capacitor;

the conduction trigger circuit is respectively connected with the first end of the driving capacitor and the controlled end of the first switching tube;

the conduction trigger circuit is used for conducting a passage between the first end of the driving capacitor and the controlled end of the first switching tube when the voltage of the first end of the driving capacitor reaches a preset conduction voltage so as to enable the first switching tube to be in a conduction state; and the switching device is also used for switching off a passage between the first end of the driving capacitor and the controlled end of the first switching tube when the voltage of the first end of the driving capacitor does not reach the preset on voltage so as to enable the first switching tube to be in an off state.

3. The electric towel rack of claim 2, wherein the charging current setting circuit comprises:

the input end of the potentiometer is connected with the power input end, and the output end of the potentiometer is connected with the first end of the driving capacitor;

the potentiometer is used for correspondingly changing the resistance value of the potentiometer when the potentiometer is triggered by a user, so that the power input end outputs charging current with a corresponding current value to the driving capacitor.

4. The electrically heated towel rail of claim 2 wherein said conduction trigger circuit comprises: the first diac, the first resistor; the first end of the first diac is connected with the controlled end of the first switch tube, and the second end of the first diac is connected with the first end of the driving capacitor through the first resistor.

5. The electrically heated towel rail of claim 2, wherein the analog control circuit further comprises:

the current limiting circuit is connected in series on a path between the power input end and the input end of the charging current setting circuit;

the current limiting circuit is used for limiting the current value of the charging current output by the charging current setting circuit to be below a preset current limiting current value.

6. The electrically heated towel rail of any one of claims 1-5, wherein the analog control circuit further comprises:

the first end of the lightning protection circuit is electrically connected with the input end of the switch circuit, and the second end of the lightning protection circuit is electrically connected with the output end of the switch circuit.

7. The electrically heated towel rail of any one of claims 1-5, wherein the analog control circuit further comprises:

and the first end of the filter circuit is electrically connected with the input end of the switch circuit, and the second end of the filter circuit is electrically connected with the output end of the switch circuit.

8. The electrically heated towel rail of any one of claims 1-5, further comprising:

the switch trigger circuit is connected in series on a path between the power input end and the input end of the switch circuit;

the switch trigger circuit is used for switching on or off a path between the power input end and the input end of the switch circuit when triggered by a user.

9. The electrically heated towel rail of any one of claims 1-5, further comprising:

the temperature control switch circuit is connected in series on a passage between the output end of the switch circuit and the heating wire;

the temperature control switch circuit is used for detecting the temperature of the heating wire and disconnecting a passage between the output end of the switch circuit and the heating wire when the temperature of the heating wire reaches a preset alarm temperature.

10. The electrically heated towel rail of any one of claims 1-5, further comprising:

one end of each airing rod is connected with the towel rack main body, and the other end of each airing rod is arranged in an extending way back to the towel rack main body;

the heating wires comprise at least one sub heating wire which is sequentially connected in series, and each airing rod is provided with at least one sub heating wire; or alternatively, the process may be performed,

the number of heating wires and the number of the analog control circuits are N, and each airing rod is provided with at least one heating wire, wherein N is greater than 1.

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