Towel drying heater controller

Abstract

The utility model discloses a towel drying heater controller comprising a control module, the control module is provided with a plurality of control ends, and the plurality of control ends are respectively electrically connected with a power supply management circuit, a zero cross detection circuit, an NTC interface circuit, a heating circuit and a thermal insulation circuit; the NTC interface circuit is used for being connected with a temperature sensor, the heating circuit is used for being connected with the first heating assembly, the heat preservation circuit is connected with the second heating assembly, the heating circuit and the heat preservation circuit are independently arranged to achieve connection of two electric heating materials with different functions, and therefore the energy-saving effect is achieved. According to a traditional mode, the same electric heating wire is adopted for generating heat whether heating or heat preservation is conducted, consumption of electric energy can be better reduced, impact of large current on a circuit during work every time is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of controllers, and particularly relates to a controller for a towel drying and heating machine. Background Technique

[0002] In order to meet different needs in people's daily life, for example, in winter or when hot towels are needed at a specified time, there is a drying and heating machine on the market that is specifically used for heating towels. Of course, its use is not limited to towels, and it can specifically be other cloth products such as bath towels. There are few options in terms of the controller part. For example, most of the parts for controlling heating use thyristors, and there is no dedicated heat preservation circuit. Usually, the heating circuit works repeatedly, which causes relatively large loss to a single heating component and affects the service life. Content of the Utility Model

[0003] The purpose of the utility model is to provide a controller for a towel drying and heating machine to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution:

[0005] A controller for a towel drying and heating machine includes a control module. The control module has several control terminals, and several control terminals are respectively electrically connected to a power management circuit, a zero-crossing detection circuit, an NTC interface circuit, a heating circuit, and a heat preservation circuit;

[0006] The NTC interface circuit is used to connect to a temperature sensor, the heating circuit is used to connect to a first heating component, and the heat preservation circuit is connected to a second heating component.

[0007] As a further technical solution, a relay circuit or / and a thyristor circuit is / are adopted in the heating circuit, and any one of them is used for switching;

[0008] A relay circuit or / and a thyristor circuit is / are adopted in the heat preservation circuit, and any one of them is used for switching.

[0009] As a further technical solution, the heating circuit includes an optocoupler U4. The first terminal interface of the optocoupler U4 is connected to a resistor R24. The other end of the resistor R24 is connected to the control module. The second end of the optocoupler U4 is grounded, and a capacitor C7 is connected between the first end and the second end;

[0010] The third terminal of the opto-coupler U4 is connected to a resistor R29. The fourth terminal of the opto-coupler U4 is respectively connected to a resistor R31 and the control terminal of a triac. One pin of the triac is connected to the other end of the resistor R31 and is connected to the ACL terminal. The other pin of the triac is connected to the other end of the resistor R29 and is connected to one end of a resistor R30 and an interface terminal. The other end of the resistor R30 is connected to a capacitor C12. The other end of the capacitor C12 is connected to the ACL terminal.

[0011] In a further technical solution, the heating circuit includes a triode Q1. The base of the triode Q1 is connected to a resistor R31. The resistor R31 is connected to a control module. The collector of the triode Q1 is grounded. The emitter of the triode Q1 is respectively connected to the coil part of a relay K1 and the input terminal of a diode D1. The output terminal of the diode D1 is connected to a 12V power supply and the coil part of the relay K1. One end of the switch part of the relay K1 is connected to the ACL terminal, and the other end is connected to the interface terminal.

[0012] In a further technical solution, the heating circuit includes a thyristor control circuit and a relay control circuit. Their output terminals are respectively connected to the interface terminal, and their output terminals are respectively connected to the control module.

[0013] In a further technical solution, it further includes a load driving circuit one for connecting to a fan to generate an air flow passing through a heating component.

[0014] In a further technical solution, the load driving circuit one includes a MOS transistor. The G pole of the MOS transistor is respectively connected to one end of a resistor R15 and a resistor R16. The other end of the resistor R15 is connected to the control module;

[0015] The S pole of the MOS transistor is connected to an R17 and a resistor R14. The other end of the resistor R14 is respectively connected to the control module and a capacitor C13. The other ends of the capacitor C13, the resistor R17, and the resistor R16 are respectively grounded;

[0016] The D pole of the MOS transistor is respectively connected to the interface terminal and the input terminal of a diode. The output terminal of the diode is respectively connected to the interface terminal and a 12V power supply.

[0017] In a further technical solution, it further includes a load driving circuit two for connecting to an additional electrical appliance.

[0018] Further technical solution: The load driving circuit two includes a triode Q2. A resistor R23 is connected to the base of the triode Q2. The resistor R23 is connected to the control module. The collector of the triode Q2 is grounded. An interface terminal is connected to the emitter of the triode Q2. A resistor R22 is connected to the interface terminal. The resistor R22 is connected to the 12V power supply.

[0019] Further technical solution: The zero-crossing detection circuit includes an optocoupler U3. A resistor R25 and a resistor R12 are sequentially connected to the first end of the optocoupler U3. The resistor R25 is connected to the ACL terminal. The second end of the optocoupler U3 is connected to the ACN terminal. A diode D7 pointing to the first end is provided between the first end and the second end. The third end of the optocoupler U3 is grounded. A resistor R18 and a resistor R19 are respectively connected to the fourth end of the optocoupler U3. The resistor R18 is connected to the 5V power supply. The other end of the resistor R19 is respectively connected to the control module and a capacitor C4. The capacitor C4 is grounded.

[0020] Advantages of the present utility model:

[0021] In the present utility model, by separately arranging a heating circuit and a heat preservation circuit to realize the connection of two kinds of electrothermal materials with different functions, an energy-saving effect can be achieved. The traditional method is to use the same electrothermal wire to generate heat whether for heating or heat preservation, which can better reduce the power consumption and avoid the impact on the circuit caused by large current during each operation, and prolong the service life.

[0022] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Brief Description of the Drawings

[0023] Figure 1 : Schematic diagram of the connection mode of the control module of the present utility model.

[0024] Figure 2 : Schematic diagram of the thyristor control circuit in the heating circuit of the present utility model.

[0025] Figure 3 : Relay circuit diagram in the heating circuit of the present utility model.

[0026] Figure 4 : Combined diagram of the thyristor control circuit and the relay control circuit in the heating circuit of the present utility model.

[0027] Figure 5 : Diagram of the load driving circuit one of the present utility model.

[0028] Figure 6 : Diagram of the load driving circuit two of the present utility model.

[0029] Figure 7 : The zero-crossing detection circuit diagram of the present utility model. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0031] Please refer to Figures 1-7 ;

[0032] The towel drying and heating machine of the present utility model has multiple heating mode options for customers to choose to adapt to different usage scenarios, reduce the damage of electronic components, and extend the service life of the product; specifically, it includes a control module, the control module has several control terminals, and several control terminals are respectively electrically connected to a power management circuit, a zero-crossing detection circuit, an NTC interface circuit, a heating circuit, and a heat preservation circuit; the heating circuit is used to connect to a first heating component, and the heat preservation circuit is connected to a second heating component; it should be noted that the heating components are different for different dryers. For example, if the dryer is in a cylindrical structure, then the heating component is a heating film installed on the side wall of the cylindrical inner cavity;

[0033] An NTC interface circuit is provided in this controller for connecting to a temperature sensor. During use, the control module sends control instructions to each circuit to make it perform corresponding operations. The power management circuit is used to convert the voltage of the commercial power of 220V into 12V or 5V suitable for each electrical appliance and provide electrical energy to each electrical appliance. In the present utility model, a heating circuit and a heat preservation circuit are separately provided to enable the dryer to achieve different modes and extend the service life;

[0034] More specifically, when the controller starts, the control module sends an instruction to the heating circuit to make the first heating component emit a large amount of heat. At the same time, the NTC interface circuit starts to work, and the temperature sensor sends the acquired data to the control module. When the specified time or specified temperature (usually greater than or equal to 100 °C) is reached, the control module makes the heating circuit stop working, that is, the heating component stops working. At the same time, the heat preservation module is ready to work. Since the temperature in the space is still very high at this time, that is, higher than the preset heat preservation temperature, the heat preservation circuit will not work immediately. When the space temperature drops to a certain value and is detected by the temperature sensor and the signal is sent to the control module, the control module triggers the heat preservation circuit to make the second heating component start to work. After reaching the specified temperature, the heat preservation circuit stops working again, and so on;

[0035] Heating and heat preservation belong to two different processes. Heating needs to reach the required temperature in a short time, which can sterilize and disinfect items. Of course, there is also drying, and the continuous process is relatively short. Therefore, the first heating component selected needs to achieve the effect of rapid temperature rise in a short time, and at the same time, the loss is relatively large, consuming a large amount of electric energy. While heat preservation only needs to maintain the corresponding temperature within a certain range without the requirement of rapid temperature rise. Therefore, materials with low energy consumption such as electric heating films can be selected. Therefore, in the present utility model, by separately setting a heating circuit and a heat preservation circuit, the connection of electric heating materials with two different functions is realized, so as to achieve the effect of energy saving. The traditional method is to use the same heating wire to generate heat whether it is heating or heat preservation, which can better reduce the consumption of electric energy and avoid the impact on the circuit caused by large current during each operation, and extend the service life.

[0036] Of course, the controller of the present utility model provides a heating circuit and a heat preservation circuit for users to choose to use, but in actual use, customers can choose to use or not according to the actual situation.

[0037] In the prior art, thyristors are usually used as switches. Although thyristors are widely used, they also have many disadvantages themselves, such as short service life, poor anti-interference ability, poor overload ability, complex control, etc. Therefore, a thyristor circuit or a relay circuit can be set as a switch in the heating circuit and the heat preservation circuit, or the two circuits can be integrated in the control board for users to choose independently.

[0038] It should be noted that the connection structures of the thyristor circuit and the relay circuit in the heating circuit and the heat preservation circuit are the same. In actual use, the same circuit or different circuits can be selected for both, which is not limited here. The following takes the heating circuit as an example for illustration;

[0039] Refer to Figure 2 , in which the thyristor circuit includes an optocoupler U4. The first terminal interface of the optocoupler U4 is connected to a resistor R24, the other end of the resistor R24 is connected to the control module, the second end of the optocoupler U4 is grounded, and a capacitor C7 is connected between the first end and the second end; the third end of the optocoupler U4 is connected to a resistor R29, the fourth end of the optocoupler U4 is respectively connected to a resistor R31 and the control end of a bidirectional thyristor. One pin of the bidirectional thyristor is connected to the other end of the resistor R31 and is connected to the ACL terminal. The other pin of the bidirectional thyristor is connected to the other end of the resistor R29 and is connected to one end of a resistor R30 and the interface terminal. The other end of the resistor R30 is connected to a capacitor C12, and the other end of the capacitor C12 is connected to the ACL terminal.

[0040] Refer to Figure 3, the relay circuit includes a triode Q1. One end of a resistor R31 is connected to the base of the triode Q1, the resistor R31 is connected to the control module, the collector of the triode Q1 is grounded, and the emitter of the triode Q1 is respectively connected to the coil part of a relay K1 and the input end of a diode D1. The output end of the diode D1 is connected to a 12V power supply and the coil part of the relay K1. One end of the switch part of the relay K1 is connected to the ACL end, and the other end is connected to the interface end. The 12V power supply is provided by a power management circuit.

[0041] When the relay circuit and the thyristor circuit are both arranged in the controller, the heating circuit includes a thyristor control circuit and a relay control circuit. Their output ends are respectively connected to the interface end, and their output ends are respectively connected to the control module. Refer to Figure 4 .

[0042] In the dryer, in addition to using a heating component as a load, there may be other auxiliary devices that need to be connected, such as a fan and a UV disinfection lamp, etc. Therefore, two load driving circuits are provided in the controller for users to use;

[0043] Refer to Figure 5 , the first load driving circuit includes a MOS transistor. The G pole of the MOS transistor is respectively connected to one ends of a resistor R15 and a resistor R16. The other end of the resistor R15 is connected to the control module; the S pole of the MOS transistor is connected to an R17 and a resistor R14. The other end of the resistor R14 is respectively connected to the control module and a capacitor C13. The other ends of the capacitor C13, the resistor R17 and the resistor R16 are respectively grounded; the D pole of the MOS transistor is respectively connected to the interface end and the input end of a diode. The output end of the diode is respectively connected to the interface end and a 12V power supply;

[0044] Refer to Figure 6 , the second load driving circuit includes a triode Q2. One end of a resistor R23 is connected to the base of the triode Q2, the resistor R23 is connected to the control module, the collector of the triode Q2 is grounded, the emitter of the triode Q2 is connected to an interface end, the interface end is connected to a resistor R22, and the resistor R22 is connected to a 12V power supply; the above two 12V power supplies are provided by a power management circuit.

[0045] The structure of the zero-crossing detection circuit was also disclosed in the embodiments of the present utility model. Refer to Figure 7, specifically including an opto-coupler U3. A first end of the opto-coupler U3 is sequentially connected to a resistor R25 and a resistor R12. The resistor R25 is connected to the ACL terminal. A second end of the opto-coupler U3 is connected to the ACN terminal. A diode D7 pointing to the first end is provided between the first end and the second end. A third end of the opto-coupler U3 is grounded. A fourth end of the opto-coupler U3 is respectively connected to a resistor R18 and a resistor R19. The resistor R18 is connected to a 5V power supply. The other end of the resistor R19 is respectively connected to a control module and a capacitor C4. The capacitor C4 is grounded.

[0046] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.

[0047] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A towel drying and heating machine controller, characterized in that: The control module comprises a control module having a plurality of control terminals, and the plurality of control terminals are respectively electrically connected to a power management circuit, a zero-crossing detection circuit, an NTC interface circuit, a heating circuit and a heat preservation circuit; The NTC interface circuit is used to connect to the temperature sensor, the heating circuit is used to connect to the first heating component, and the heat preservation circuit is connected to the second heating component.

2. A towel drying and heating machine controller according to claim 1, characterized in that: The heating circuit uses a relay circuit or / and a thyristor circuit, either of which is used for switching; The heat preservation circuit adopts a relay circuit and / or a thyristor circuit, any one of which is used for switching.

3. A towel drying and heating machine controller according to claim 2, characterized in that: The heating circuit includes an optical coupling device U4, a first end interface of the optical coupling device U4 is connected to a resistor R24, the other end of the resistor R24 ​​is connected to a control module, a second end of the optical coupling device U4 is grounded, and a capacitor C7 is connected between the first end and the second end; The third end of the optical coupling device U4 is connected to a resistor R29, and the fourth end of the optical coupling device U4 is respectively connected to a resistor R31 and a control end of a bidirectional thyristor, one of the pins of the bidirectional thyristor is connected to the other end of the resistor R31 and to the ACL end, another pin of the bidirectional thyristor is connected to the other end of the resistor R29, and to one end of the resistor R30 and the interface end, the other end of the resistor R30 is connected to a capacitor C12, and the other end of the capacitor C12 is connected to the ACL end.

4. A towel drying and heating machine controller according to claim 2 or 3, characterized in that: The heating circuit includes a transistor Q1, a base of the transistor Q1 is connected to a resistor R31, the resistor R31 is connected to a control module, a collector of the transistor Q1 is grounded, an emitter of the transistor Q1 is respectively connected to a coil portion of a relay K1 and an input end of a diode D1, an output end of the diode D1 is connected to a 12V power supply and the coil portion of the relay K1, one end of a switch portion of the relay K1 is connected to an ACL end, and the other end is connected to an interface end.

5. A towel drying and heating machine controller according to claim 4, characterized in that: The heating circuit comprises a thyristor control circuit and a relay control circuit, the output ends of both circuits are respectively connected to the interface end, and the output ends of both circuits are respectively connected to the control module.

6. A towel drying and heating machine controller according to claim 1, characterized in that: It also includes a load driving circuit 1, which is used to connect with the fan to generate airflow passing through the heating component.

7. A towel drying and heating machine controller according to claim 6, characterized in that: The load driving circuit 1 includes a MOS tube, the G pole of the MOS tube is connected to one end of the resistor R15 and the resistor R16 respectively, and the other end of the resistor R15 is connected to the control module; The S pole of the MOS tube is connected to R17 and the resistor R14, the other end of the resistor R14 is connected to the control module and the capacitor C13 respectively, and the other ends of the capacitor C13, the resistor R17 and the resistor R16 are grounded respectively; The D pole of the MOS tube is connected to the interface end and the input end of the diode respectively, and the output end of the diode is connected to the interface end and the 12V power supply respectively.

8. The towel drying and heating machine controller according to claim 1, characterized in that: A load driving circuit 2 is also included for connecting additional electrical appliances.

9. A towel drying and heating machine controller according to claim 8, characterized in that: The load driving circuit 2 includes a transistor Q2, the base of which is connected to a resistor R23, which is connected to a control module, the collector of which is grounded, the emitter of which is connected to an interface end, which is connected to a resistor R22, and the resistor R22 is connected to a 12V power supply.

10. A towel drying and heating machine controller according to claim 1, characterized in that: The zero-crossing detection circuit includes an optical coupling device U3, a first end of the optical coupling device U3 is connected to a resistor R25 and a resistor R12 in sequence, the resistor R25 is connected to the ACL end, the second end of the optical coupling device U3 is connected to the ACN end, and a diode D7 pointing to the first end is provided between the first end and the second end, the third end of the optical coupling device U3 is grounded, the fourth end of the optical coupling device U3 is respectively connected to a resistor R18 and a resistor R19, the resistor R18 is connected to a 5V power supply, the other end of the resistor R19 is respectively connected to a control module and a capacitor C4, and the capacitor C4 is grounded.

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