A common heating system applied to a shower head

Abstract

The application provides a common heating system applied to a spray head, relates to the field of heating systems, and discloses a common heating system applied to a spray head, which comprises a photoelectric coupler circuit, a triode Q1, a relay and a double series connection switching diode, an input of the photoelectric coupler circuit is externally connected with a power supply and a temperature sensor, and an output end of the double series connection switching diode is externally connected with a heating piece. The utility model adopts the scheme of photoelectric coupler isolation, triode Q1 driving, relay and double series connection switching diode control, so as to realize the safe operation of low-voltage control high-voltage heating circuit, the circuit is simple and low in cost, and the circuit also plays the role of protecting the circuit. The utility model is safe and reliable, adopts photoelectric coupler control direction and pulse signals, and has stronger anti-interference and EMC capacity. A double series connection switching diode is connected in parallel with the relay, the circuit is prevented from being broken down, the use control is simple, and components are flexible.

Description

Technical Field

[0001] This application relates to the field of heating systems, and more specifically, to a common heating system for use in nozzles. Background Technology

[0002] In printer control, traditional printhead heating systems are prone to oxidation and ablation under high-temperature pulses, resulting in short printhead lifespan and material fatigue caused by frequent heating / cooling cycles. Furthermore, they require continuous preheating or high-power pulses, leading to high energy consumption and heat loss to the printhead structure, resulting in low utilization. High temperatures also cause organic matter in the ink to carbonize and adhere to the inner wall of the nozzle, causing printhead blockage. Summary of the Invention

[0003] The purpose of this application is to provide a common heating system for nozzles that can solve the above-mentioned technical problems.

[0004] This application provides a common heating system for a nozzle, including an optocoupler circuit, a transistor Q1, a relay, and a dual-series switching diode. The input of the optocoupler circuit is connected to a power supply and a temperature sensor. The output of the optocoupler circuit is connected to the base (B) of the transistor Q1. The collector (C) of the transistor Q1 is connected to the first interface of the relay through a resistor R4. The second and fifth interfaces of the relay are both connected to the power supply. The fourth interface of the relay is connected to the input of the dual-series switching diode. The output of the dual-series switching diode is connected to a heating element.

[0005] Preferably, the optocoupler circuit includes resistor R3, resistor R5, capacitor C2, optocoupler, resistor R2, capacitor C1, resistor R6, and resistor R7. The first interface of the optocoupler is grounded through resistor R5 and capacitor C2, the third interface of the optocoupler is grounded through resistor R7, the third interface of the optocoupler is connected to the base of transistor Q1 through resistor R6, the fourth interface of the optocoupler is connected to the power supply through resistor R2, and the fourth interface of the optocoupler is connected to the power supply through capacitor C1.

[0006] Preferably, the optocoupler is model PS2801C-1-F3.

[0007] Preferably, the transistor Q1 is model 2SD2655.

[0008] Preferably, the relay model is SRD_24VDC-SL-C.

[0009] The beneficial effects of this utility model are:

[0010] This utility model provides a common heating system for a nozzle, including an optocoupler circuit, a transistor Q1, a relay, and a dual-series switching diode. The input of the optocoupler circuit is externally connected to a power supply and a temperature sensor. The output of the optocoupler circuit is connected to the base (B) of the transistor Q1. The collector (C) of the transistor Q1 is connected to the first interface of the relay through a resistor R4. The second and fifth interfaces of the relay are both connected to the power supply. The fourth interface of the relay is connected to the input of the dual-series switching diode. A heating element is externally connected to the output of the dual-series switching diode. This utility model employs optocoupler isolation, transistor Q1 driving, relay, and dual-series switching diode control to achieve safe operation of a high-voltage heating circuit under low-voltage control. The circuit is simple and low-cost, and also serves to protect the circuit. It is safe and reliable: the use of optocoupler control for direction and pulse signals provides stronger anti-interference and EMC capabilities; the relay is connected in parallel with a dual-series switching diode to prevent circuit breakdown. It is simple to use and control, and the components are flexible. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is the circuit schematic diagram of this utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0015] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0016] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0019] like Figure 1 As shown, a common heating system for a nozzle includes an optocoupler circuit, a transistor Q1, a relay, and a dual-series switching diode. The input of the optocoupler circuit is connected to an external power supply and a temperature sensor. The output of the optocoupler circuit is connected to the base (B) of the transistor Q1. The collector (C) of the transistor Q1 is connected to the first interface of the relay through a resistor R4. The second and fifth interfaces of the relay are both connected to the power supply. The fourth interface of the relay is connected to the input of the dual-series switching diode. A heating element is externally connected to the output of the dual-series switching diode. This invention employs optocoupler isolation, transistor Q1 driving, relay, and dual-series switching diode control to achieve safe operation of a high-voltage heating circuit under low-voltage control. The circuit is simple and low-cost, and also serves to protect the circuit. It is safe and reliable: the use of optocoupler control for direction and pulse signals provides stronger anti-interference and EMC capabilities; the relay is connected in parallel with a dual-series switching diode to prevent circuit breakdown. The system is simple to use and control, and the components are flexible.

[0020] In this embodiment, the optocoupler circuit includes resistor R3, resistor R5, capacitor C2, optocoupler, resistor R2, capacitor C1, resistor R6, and resistor R7. The first interface of the optocoupler is grounded through resistor R5 and capacitor C2, respectively. The third interface of the optocoupler is grounded through resistor R7. The third interface of the optocoupler is connected to the base (B) of transistor Q1 through resistor R6. The fourth interface of the optocoupler is connected to the power supply through resistor R2. The fourth interface of the optocoupler is connected to the power supply through capacitor C1.

[0021] Specifically, this utility model uses a PS2801C-1-F3 optocoupler. When the control terminal outputs a high level, current flows through the LED inside the optocoupler, the LED emits light, and the phototransistor (output side) inside the optocoupler conducts after receiving the light, forming a current path; thus achieving electrical isolation between the input and output, preventing interference or high voltage from entering the control terminal.

[0022] This design uses a 2SD2655 transistor Q1. After the output side of the optocoupler is turned on, the current flows from the power supply through the output terminal of the optocoupler to the base resistor of the transistor, and then to the base of the transistor, causing the NPN transistor to saturate and conduct, thereby amplifying the output current of the optocoupler and providing sufficient driving capability to the relay coil. After transistor Q1 is turned on, the relay coil is energized, generating a magnetic field to attract the contacts, thereby connecting or disconnecting the external load circuit.

[0023] This design uses the SRD-24VDC-SL-C conversion C-type relay, which is small in size, has multiple load options, and can meet ambient temperatures of +85℃ / +105℃. When the coil is energized, 24V is applied to the coil, the electromagnet generates a magnetic field, the armature is attracted, the load circuit is connected, and the external high voltage / high current circuit is energized and works. When the coil is de-energized, the magnetic field disappears, the armature is reset under the action of the spring, and the load is de-energized.

[0024] This design uses BAV99 dual series switching diodes. When the control terminal outputs a low level, the LED of the optocoupler is turned off, the internal phototransistor is cut off, and then the base current of transistor Q1 returns to zero, transistor Q1 is cut off, the relay coil is de-energized, the contacts are reset, and at the moment transistor Q1 is turned off, the reverse electromotive force generated by the relay coil is discharged through the dual series switching diodes, preventing the protection circuit from being broken down.

[0025] The working principle of this design is as follows: Before the system is started, different temperature values ​​can be set according to the different viscosities of the ink. When the system temperature is 0.5℃ lower than the set temperature value, the system will start heating. When the system temperature is 0.5℃ higher than the set temperature value, the system will stop heating.

[0026] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A common heating system for a nozzle, characterized in that: The device includes an optocoupler circuit, a transistor Q1, a relay, and a dual-series switching diode. The input of the optocoupler circuit is connected to an external power supply and a temperature sensor. The output of the optocoupler circuit is connected to the base (B) of the transistor Q1. The collector (C) of the transistor Q1 is connected to the first interface of the relay through a resistor R4. The second and fifth interfaces of the relay are both connected to the power supply. The fourth interface of the relay is connected to the input of the dual-series switching diode. The output of the dual-series switching diode is connected to an external heating element.

2. The common heating system applied to a nozzle according to claim 1, characterized in that: The optocoupler circuit includes resistor R3, resistor R5, capacitor C2, optocoupler, resistor R2, capacitor C1, resistor R6, and resistor R7. The first interface of the optocoupler is grounded through resistor R5 and capacitor C2, respectively. The third interface of the optocoupler is grounded through resistor R7. The third interface of the optocoupler is connected to the base (B) of transistor Q1 through resistor R6. The fourth interface of the optocoupler is connected to the power supply through resistor R2 and capacitor C1.

3. A common heating system for a nozzle according to claim 2, characterized in that: The model of the optocoupler is PS2801C-1-F3.

4. A common heating system for a nozzle according to claim 1, characterized in that: The transistor Q1 is model 2SD2655.

5. A common heating system for a nozzle according to claim 1, characterized in that: The relay model is SRD_24VDC-SL-C.

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