New process MCH heater

Abstract

The utility model discloses a novel technology MCH heater comprising an upper layer ceramic body and a lower layer ceramic body, the upper layer ceramic body is provided with an electrode groove I used for external connection of a lead, and a middle interlayer ceramic body is arranged between the upper layer ceramic body and the lower layer ceramic body. One surface, close to the middle interlayer ceramic body, of the upper-layer ceramic body is provided with an upper-layer plate resistance wire formed through tungsten paste printing and sintering, one surface, close to the middle interlayer ceramic body, of the lower-layer ceramic body is provided with a lower-layer plate resistance wire formed through tungsten paste printing and sintering, and the first electrode and the second electrode are respectively arranged at two joints of the first heating circuit; the first electrode and the third electrode are respectively arranged at two joints of the second heating circuit, and the middle interlayer ceramic body is provided with an electric 0-machine groove II matched with the electrode groove I; according to the utility model, the heating value is increased, the wide voltage design of the global voltage from AC100V to AC240V is realized, the traditional voltage control method of the hair straightener design is changed, and the real dual-voltage control is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of straight hair beauty, in particular to a new process MCH heater. Background Art

[0002] MCH is a ceramic heating element. Since the ceramic heater heats up quickly, has no open flame, is durable and resistant to acids and alkalis, and the hair straightener straightens hair by utilizing the principle that proteins are denatured by heat, a good hair straightener requires a heating element with excellent performance. MCH is widely used in the field of hair straighteners. MCH is formed by printing a resistive paste on a ceramic substrate and sintering them together, and then metal leads are led out at both ends of the resistive paste. When an electric current passes through the alloy tungsten paste, high temperature is quickly generated to heat the hair straightener.

[0003] In actual use, due to different grid voltages in various countries, there is AC100V and AC240V. When the resistance is constant, different voltages result in different powers. Therefore, MCHs on hair straighteners are basically used at a fixed voltage. Manufacturers will select MCHs with different resistance values when selling to different countries and regions. Since MCHs cannot have a unified specification, it is very inconvenient for large-scale production, resulting in high production costs.

[0004] Although some hair straightener manufacturers have produced so-called global voltage products through control circuits, due to the rapid heating of MCH, it can reach more than 700 degrees Celsius in 10 seconds, and the potential safety hazard is very large. Because the hair straightener is used to style people's hair, once the temperature gets out of control, the high temperature can easily burn the hair. Content of the Utility Model

[0005] In view of the above technical problems, the utility model provides a new process MCH heater, which includes an upper ceramic body and a lower ceramic body. An electrode groove one for externally connecting leads is arranged on the upper ceramic body. An intermediate spacer ceramic body is arranged between the upper ceramic body and the lower ceramic body. An upper plate resistance wire formed by printing and sintering tungsten paste is arranged on one side of the upper ceramic body close to the intermediate spacer ceramic body. A lower plate resistance wire formed by printing and sintering tungsten paste is arranged on one side of the lower ceramic body close to the intermediate spacer ceramic body. Both the upper plate resistance wire and the lower plate resistance wire include a first heating circuit, a second heating circuit, a first electrode, a second electrode, and a third electrode. The first electrode and the second electrode are respectively arranged at two joints of the first heating circuit. The first electrode and the third electrode are respectively arranged at two joints of the second heating circuit. An electrode groove two matching the electrode groove one is arranged on the intermediate spacer ceramic body. Both the electrode groove one and the electrode groove two are provided with three. The first electrode, the second electrode, and the third electrode are respectively arranged in the corresponding electrode grooves.

[0006] Further, the first heating circuit and the second heating circuit are formed by printing and sintering tungsten paste of different types or different ratios, and the resistance values of the first heating circuit and the second heating circuit are different.

[0007] Further, on one side of the intermediate spacer ceramic body close to the upper plate resistance wire, a first screen printing layer matching the upper ceramic body and the upper plate resistance wire is screen printed, and on one side of the intermediate spacer ceramic body close to the lower plate resistance wire, a second screen printing layer matching the lower plate resistance wire and the lower ceramic body is screen printed.

[0008] Further, the projections of the heating circuits on the lower plate resistance wire and the lower ceramic body in the thickness direction coincide to improve the heating uniformity.

[0009] Further, the densities and lengths of the heating circuits on the lower plate resistance wire and the lower ceramic body are different to obtain different heating effects.

[0010] Further, the first electrodes on the upper plate resistance wire and the lower plate resistance wire are all connected to the external lead A, the second electrodes on the upper plate resistance wire and the lower plate resistance wire are all connected to the external lead B, and the first electrodes on the upper plate resistance wire and the lower plate resistance wire are all connected to the external lead C.

[0011] The present utility model also proposes a control circuit for a new process MCH heater, including:

[0012] AC input circuit: for receiving alternating current from the power grid or an external power source;

[0013] Voltage sampling unit: for monitoring the input voltage of the AC input circuit and feeding back information to the MCU control unit to ensure power supply stability;

[0014] 5V switching power supply circuit: for converting alternating current into direct current and providing a stable 5V output voltage for other components to use;

[0015] TR1 / TR2 switch: for controlling the direction or magnitude of current flow;

[0016] MCU control unit: a microcontroller, namely the MCU, for receiving information from the voltage sampling unit and controlling the TR1 and TR2 switches, thereby regulating the power supply;

[0017] Display unit: for displaying the current status information to the user;

[0018] Three-terminal MCH resistance sampling circuit: for measuring the current intensity and monitoring it through the MCU;

[0019] The control method is as follows:

[0020] S1. When the voltage sampling unit detects that the voltage of the currently used power grid or external power supply is 100VAC, the MCU control unit is used to turn on TR1 and turn off TR2;

[0021] S2. When the voltage sampling unit detects that the voltage of the currently used power grid or external power supply is 240VAC, the MCU control unit is used to turn on TR2 and turn off TR1.

[0022] The beneficial effects of the present utility model compared with the prior art are as follows: (1) By printing heating circuits on both the upper ceramic body and the lower ceramic body, the present utility model realizes heat generation on both sides, improving the heat generation amount; (2) The MCH of the present utility model adopts a new "sandwich" printing process and sintering. For high-voltage circuits, MCH with high resistance values is selected, and for low-voltage areas, MCH with low resistance values is selected. There are two resistance values available on one MCH, effectively ensuring the safety of users when using the hair straightener; at the same time, it enables the MCH manufacturer to standardize production and improve production efficiency; (3) The present utility model changes the traditional voltage control method of the hair straightener design and realizes true dual-voltage control; (4) In cooperation with the temperature control method of the hair straightener, the present utility model easily realizes a wide-voltage design of global voltage from AC100V to AC240V. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an exploded structural schematic diagram of the heater of the present utility model.

[0024] Figure 2 It is an overall structural schematic diagram of the heater of the present utility model.

[0025] Figure 3 It is a functional block diagram of the MCH hair straightener of the present utility model.

[0026] Figure 4 It is a control circuit diagram of the MCH of the present utility model.

[0027] Reference numerals in the drawings: 1 - upper ceramic body; 2 - upper plate resistance wire; 3 - intermediate spacer ceramic body; 4 - lower plate resistance wire; 5 - lower ceramic body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present utility model will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not limit the present utility model.

[0029] Embodiment: As Figure 1A new process MCH heater shown in the figure includes an upper ceramic body 1 and a lower ceramic body 5. An electrode groove one for external connection of leads is provided on the upper ceramic body 1. An intermediate spacer ceramic body 3 is provided between the upper ceramic body 1 and the lower ceramic body 5. An upper plate resistance wire 2 formed by tungsten paste printing and sintering is provided on one side of the upper ceramic body 1 close to the intermediate spacer ceramic body 3. A lower plate resistance wire 4 formed by tungsten paste printing and sintering is provided on one side of the lower ceramic body 5 close to the intermediate spacer ceramic body 3. Both the upper plate resistance wire 2 and the lower plate resistance wire 4 include a first heating circuit, a second heating circuit, a first electrode, a second electrode and a third electrode. The first electrode and the second electrode are respectively provided at two joints of the first heating circuit. The first electrode and the third electrode are respectively provided at two joints of the second heating circuit. An electrode groove two matching the electrode groove one is provided on the intermediate spacer ceramic body 3. There are three electrode grooves one and three electrode grooves two. The first electrode, the second electrode and the third electrode are respectively arranged in the corresponding electrode grooves.

[0030] The first electrodes on the upper plate resistance wire 2 and the lower plate resistance wire 4 are all connected to the external lead A. The second electrodes on the upper plate resistance wire 2 and the lower plate resistance wire 4 are all connected to the external lead B. The first electrodes on the upper plate resistance wire 2 and the lower plate resistance wire 4 are all connected to the external lead C. Thus, both layers can generate heat, improving the heat generation amount. The first heating circuit and the second heating circuit are formed by tungsten paste printing and sintering with different types or different ratios. The resistance values of the first heating circuit and the second heating circuit are different. For example, the resistance values of lead A and lead B are 25 ohms, and the resistance values of lead A and lead C are 50 ohms.

[0031] One side of the intermediate spacer ceramic body 3 close to the upper plate resistance wire 2 is screen-printed with a screen printing layer one matching the upper ceramic body 1 and the upper plate resistance wire 2. One side of the intermediate spacer ceramic body 3 close to the lower plate resistance wire 4 is screen-printed with a screen printing layer two matching the lower plate resistance wire 4 and the lower ceramic body 5. The projections of the heating circuits on the lower plate resistance wire 4 and the lower ceramic body 5 in the thickness direction coincide to improve the heating uniformity. The densities and lengths of the heating circuits on the lower plate resistance wire 4 and the lower ceramic body 5 are different to obtain different heating effects.

[0032] A control circuit of a new process MCH heater includes:

[0033] AC input circuit: used to receive alternating current from the power grid or an external power supply.

[0034] Voltage sampling unit: used to monitor the input voltage of the AC input circuit and feedback the information to the MCU control unit to ensure power stability.

[0035] 5V Switching Power Supply Circuit: It is used to convert alternating current into direct current and provide a stable 5V output voltage for other components to use.

[0036] TR1 / TR2 Switch: It is used to control the direction or magnitude of current flow.

[0037] MCU Control Unit: The microcontroller, namely MCU, is used to receive information from the voltage sampling unit and control the TR1 and TR2 switches, thereby regulating the power supply.

[0038] Display Unit: It is used to display the current status information to the user.

[0039] Three-terminal MCH Resistance Sampling Circuit: It is used to measure the current intensity and monitor it through the MCU;

[0040] The working principle of the present utility model is as follows: In the traditional MCH manufacturing process, only one heating circuit and two electrodes arranged at the joints are printed; on the basis of the traditional MCH manufacturing process, the present utility model adds one more heating circuit and leads out one more lead in the middle. When developing and designing straight hair, users can choose according to their needs. When AC110V is needed, lead A and lead B are used. When AC240V is needed, lead A and lead C are used.

[0041] The specific control method is as follows: When the voltage sampling unit detects that the voltage of the currently used power grid or external power supply is 100VAC, the MCU control unit controls the I / O to output a high level H3 to turn on TR1 and turn off TR2, and 2-1 in M1 / M2 works; when the voltage sampling unit detects that the voltage of the currently used power grid or external power supply is 240VAC, the MCU control unit controls the I / O to output a high level H2 to turn on TR2 and turn off TR1, and 2-1 in M1 / M2 works. M1 / M2 is the MCH of the new process of the present utility model.

Claims

1. A new process MCH heater, comprising an upper ceramic body (1) and a lower ceramic body (5), wherein an electrode groove one for externally connecting a lead is provided on the upper ceramic body (1), and it is characterized in that, An intermediate spacer ceramic body (3) is provided between the upper ceramic body (1) and the lower ceramic body (5). On the side of the upper ceramic body (1) close to the intermediate spacer ceramic body (3), an upper plate resistance wire (2) formed by tungsten paste printing and sintering is provided. On the side of the lower ceramic body (5) close to the intermediate spacer ceramic body (3), a lower plate resistance wire (4) formed by tungsten paste printing and sintering is provided. Both the upper plate resistance wire (2) and the lower plate resistance wire (4) include a first heating circuit, a second heating circuit, a first electrode, a second electrode, and a third electrode. The first electrode and the second electrode are respectively arranged at two joints of the first heating circuit, and the first electrode and the third electrode are respectively arranged at two joints of the second heating circuit. On the intermediate spacer ceramic body (3), a motor slot two matching the electrode slot one is provided. There are three electrode slots one and three electrode slots two. The first electrode, the second electrode, and the third electrode are respectively arranged in the corresponding electrode slots.

2. The new process MCH heater according to claim 1, characterized in that, The first heating circuit and the second heating circuit are formed by tungsten paste printing and sintering with different types or different ratios, and the resistance values of the first heating circuit and the second heating circuit are different.

3. A new process MCH heater according to claim 2, characterized in that, On the side of the intermediate spacer ceramic body (3) close to the upper plate resistance wire (2), a screen printing layer one matching the upper ceramic body (1) and the upper plate resistance wire (2) is provided by screen printing. On the side of the intermediate spacer ceramic body (3) close to the lower plate resistance wire (4), a screen printing layer two matching the lower plate resistance wire (4) and the lower ceramic body (5) is provided by screen printing.

4. A new process MCH heater as claimed in claim 3, characterized in that, The projection of the heating circuit on the lower plate resistance wire (4) and the lower ceramic body (5) in the thickness direction coincides to improve the heating uniformity.

5. A new process MCH heater according to claim 4, characterized in that, The density and length of the heating circuits on the lower plate resistance wire (4) and the lower ceramic body (5) are different to obtain different heating effects.

6. The new process MCH heater according to claim 5, characterized in that, The first electrodes on the upper plate resistance wire (2) and the lower plate resistance wire (4) are all connected to the external lead A, the second electrodes on the upper plate resistance wire (2) and the lower plate resistance wire (4) are all connected to the external lead B, and the first electrodes on the upper plate resistance wire (2) and the lower plate resistance wire (4) are all connected to the external lead C.

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