CN117015089A - Electric heating appliance with temperature capable of being conveniently regulated and controlled - Google Patents

Abstract

The invention discloses an electric heating appliance with temperature convenient to regulate and control, which comprises a heating carrier, a heating element, an interface fixing box, a connecting flexible wire, a controller and a plug wire, wherein the heating element is arranged on the heating carrier, the interface fixing box with one end of the heating carrier being powered on is connected with the controller through the connecting flexible wire and is connected with a power supply through a power supply plug, and the controller comprises a shell and a control circuit arranged in the shell. The temperature of the invention can be regulated and limited, and the product has the characteristics of few interface contacts, few components, high safety, low failure rate, no electromagnetic pollution, high cost performance, convenient mass production and the like; besides the electric heating appliance, the invention can be used for adjusting the physical quantity of other electric appliances, such as the speed regulation of an electric fan, the dimming of various lamps and lanterns, and the like.

Description

Electric heating appliance with temperature capable of being conveniently regulated and controlled

Technical Field

The invention relates to the technical field of household electric heating appliances, in particular to an electric heating appliance with temperature capable of being conveniently regulated and controlled.

Background

There are three general types of electric blankets with temperature regulation: 1. the unidirectional conductive characteristic of the diode is utilized to reduce the full power of the appliance to half power, thereby achieving the purpose of adjusting the temperature of the electric blanket; 2. the temperature of the electric blanket is regulated by changing the conduction angle of the sine wave voltage of 220V-50 Hz; 3. the frequency of the 220V-50 Hz sine wave voltage is regulated, namely the number (or duty ratio) of the 50Hz sine wave voltage per second is regulated to reduce the temperature of the power regulating electric blanket.

The products of the above three ways of temperature regulation have no temperature limiting function, and in order to prevent fire, the structure of the heating element must adopt a double-layer spiral line, and the heating element cannot be folded for use, otherwise, the products are scrapped. Besides the third type with automatic control function, the other two types of automatic conversion-free functions have the following common defects:

1. the load (heating wire) is always electrified to generate heat, if the interface is in poor contact or the heating wire is broken, arc discharge (commonly called ignition) is easily generated, so that the electric blanket is scrapped or fire accidents are caused;

2. the three products can only use alternating current and cannot use direct current;

3. the first method has the advantages that only two temperature selection gears (high and low) are difficult to meet the use requirement; the second phase shift changes the waveform of the 220V-50 Hz sine wave voltage, thereby generating harmonic interference; the third type of initial heating power is different from the set heating power, namely the heating power must be changed when the gear is automatically shifted, the rated power of the appliance is difficult to determine, and the former two modes only can design products with relatively small heating power and slow temperature rise, otherwise fire accidents are easy to cause.

In addition, the above three ways of adjusting temperature are difficult to be used on electric heating pads, not to mention small-sized electric heating appliances, and especially cannot be used on direct-current electric heating appliances.

Therefore, we propose an electric heating appliance with temperature convenient to control to solve the above problems.

Disclosure of Invention

The invention aims to provide an electric heating appliance with the temperature convenient to regulate and control, the temperature of the electric heating appliance can be regulated and limited, and the product has the characteristics of fewer interface contacts, fewer components, high safety, low failure rate, no electromagnetic pollution, high cost performance, convenience for mass production and the like; besides the electric heating appliance, the invention can be used for adjusting the physical quantity of other electric appliances, such as the speed regulation of an electric fan, the dimming of various lamps and lanterns, and the like.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the electric heating appliance with temperature capable of being regulated and controlled conveniently includes heating carrier, heating element, interface fixing box, connecting soft wire, controller and plug wire, the heating element is installed on the heating carrier, the interface fixing box with power supply at one end of the heating carrier is connected with the controller via the connecting soft wire and connected with power supply via the power supply plug, the controller includes casing and control circuit installed inside the casing, the control circuit includes working power supply for the single chip microcomputer and its operation circuit and display circuit and auxiliary circuit, the output port of the single chip microcomputer outputs periodic level comprising high and low level to control the on/off of the executing element to form temperature regulating circuit and temperature limiting circuit,

the temperature regulating circuit consists of an operation circuit port c of the singlechip, a port d of the display circuit, an output port a and an output circuit resistor R0 to an executive component;

the temperature limiting circuit is formed by adding a pulse level which is received by a port b of a singlechip and receives a high-low level and is received by a temperature limiting resistor R on the basis of a temperature regulating circuit, and controlling the output state of an output port of the singlechip through technical treatment.

In a further embodiment, in the temperature regulating circuit, the output port a of the singlechip outputs one or more cycle levels.

In a further embodiment, in the temperature limiting circuit, the port of the singlechip receiving the high-low level processes the received limiting level and the high-low conversion level in the singlechip to change the output state of the output port, and the resistance R0 controls the on and off of the executing element.

In a further embodiment, the port of the single chip microcomputer receiving the high and low levels is one output port or one of more than one output ports.

In a further embodiment, the output port a of the singlechip is one output port or one of two or more output ports.

In a further embodiment, the actuator is mainly composed of a silicon controlled rectifier, a field effect transistor, a switch tube and a relay.

In a further embodiment, the working voltage of the single-chip microcomputer is provided with a trimming voltage circuit, the working voltage is adjusted, the pulse voltage variation on the temperature limiting resistor R is matched, the low-level signal or the high-level signal is received by any port of the single-chip microcomputer and is internally processed to the output port to control the cut-off or the conduction of the executive component.

In a further embodiment, the power source may be one of ac, dc, and mobile power source.

In a further embodiment, the heating element is a single heating wire or a heating sheet, and the structure of the heating element is one of a single spiral wire, a straight wire, a carbon fiber wire, a carbon film and a graphene film.

In a further embodiment, the interface contacts of the interface fixing box are controlled in a single mode to be two, and the interface contacts of the interface fixing box are controlled in a double mode to be three.

Compared with the prior art, the invention has the beneficial effects that:

the temperature of the invention can be regulated and limited, and the product has the characteristics of few interface contacts, few components, high safety, low failure rate, no electromagnetic pollution, high cost performance, convenient mass production and the like; besides being used for electric heating appliances, the invention can also be used for adjusting physical quantities of other electric appliances, such as speed regulation of an electric fan, dimming of various lamps and lanterns, and the like:

1. the ratio of consumed electric energy in unit time is as follows: only the period (tax+tbx) (hereinafter referred to as output period) of the output port of the singlechip and the cycle time t i of the output port of the singlechip are changed to control the on-off working mode of the execution element, and the voltage, the frequency and the heating power of the power supply used by the device are not changed, so that the device with adjustable temperature of various power supplies (including a low-voltage power supply, a mobile power supply and the like) can be designed and manufactured conveniently;

2. the ratio of consumed electric energy in unit time is as follows: only the output period and the circulation time t i of the output port of the singlechip are changed to control the on-off working mode of the executive component, so that the temperature-adjustable single-control, double-control and multi-control electric blanket, pad and similar heating appliances can be conveniently manufactured;

3. the ratio of consumed electric energy in unit time is as follows: only changing the output period and cycle time t i of the output port of the singlechip to control the on-off working mode of the executive component, and adjusting the physical quantity of other electrical appliances, such as electric fan speed regulation, dimming of various lamps and lanterns, and the like;

4. the ratio of consumed electric energy in unit time is as follows: only the output period and the circulation time t i of the output port of the singlechip are changed to control the on-off working mode of the executive component, so the device has the characteristics of fewer interface joints (two joints), fewer components, small volume and high reliability;

5. the temperature control mode that the level (low level or pulse level) on the temperature limiting resistor R (can be a plurality of) which is connected with the load in series can be accepted by any port (also can n) of the singlechip (MCU), the level on the temperature limiting resistor is determined by the temperature coefficient of the load heating material, the periodic variation of the corresponding output port (also can n) for outputting high and low level is controlled through technical treatment, and the on or off of the executive component (can correspond to a plurality of executive components) is controlled through an output circuit, so that the temperature of the appliance can be controlled and adjusted;

6. because the temperature control mode that any port (n or more) of the single chip microcomputer can accept the upper limit Wen Dianping (high level or low level or pulse level, determined by positive temperature coefficient of load heating materials) of temperature-limiting resistor R (or more) connected in series with the load is adopted, the periodic variation of the corresponding output port (n or more) for outputting the high and low level is controlled through technical treatment, and the on-off of the executive component (or corresponding to a plurality of executive components) is controlled through an output circuit, various appliances with controllable and adjustable temperature can be manufactured conveniently.

7. Because the control circuit is adopted to work the adjustable circuit of the power supply, various appliances are easy to realize the temperature limiting function.

Drawings

FIG. 1 is a diagram showing the composition of an electric heating appliance with temperature convenient to control;

FIG. 2 is a block diagram of the controller of the present apparatus;

FIG. 3 is a schematic diagram of a single-control half-wave three-gear temperature control device for LED display;

FIG. 4 is a schematic diagram of a single-control full-wave three-gear temperature control device for LED display;

FIG. 5 is a schematic diagram of a structure of the LED display double-control half-wave four-gear temperature regulation and control device;

fig. 6 is a schematic diagram of a digital tube gear display double-control full-wave temperature regulation and control device.

In the figure: 1. a heat generating carrier; 2. a heating element; 3. an interface fixing box; 4. a connection cord; 5. a controller; 6. a plug wire.

Detailed Description

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.

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

Referring to fig. 1-6, an electric heating appliance with temperature capable of being conveniently regulated and controlled is composed of a heating carrier 1, a heating element 2, an interface fixing box 3, a connecting soft wire 4, a controller 5 and a plug wire 6, wherein the heating element 2 is arranged on the heating carrier 1, the interface fixing box 3 with one end of the heating carrier 1 being powered on is connected with the controller 5 through the connecting soft wire 4 and is connected with a power supply through a power plug (or connector) 6.

Referring to fig. 2, a block diagram of a controller 5 (except for a plug wire connected with a power supply and a load connected with a soft wire, the rest blocks form a part of the controller 5 hereinafter), the controller comprises a shell and a control circuit arranged in the shell, the control circuit comprises a power supply, a working power supply of the control circuit is applied to a singlechip, an operation circuit port c of the singlechip, a port d of a display circuit, an output port a and an output circuit resistor R0 of the display circuit together form a temperature regulating circuit of an appliance, and in the circuit for forming temperature regulation, the output port a (one output port or two or more output ports) of the singlechip outputs one or more cycle levels (see temperature regulating description below); in the block diagram forming the temperature regulating circuit, if the port b receiving the high and low level of the single chip microcomputer receives the pulse level on the temperature limiting resistor R (the load RL has the change of the resistance value of the heating wire with positive temperature coefficient), the temperature limiting circuit is formed by controlling the output state of the output port of the single chip microcomputer through technical processing, in the temperature limiting circuit, the port (one or more ports) receiving the high and low level of the single chip microcomputer changes the output state of the output port through technical processing (see description of the temperature limiting principle) of the received limiting level and the high and low conversion level in the single chip microcomputer, and the executive component (the controllable silicon, the field effect transistor, the switching tube, the relay and the like) is controlled to be conducted and cut off (not conducted) through the resistor R0, so that the load is heated electrically or not heated to achieve the functions of regulating temperature and limiting temperature.

In the composition temperature regulating circuit, the controller adopts: the ratio (size) of consumed electric energy in each gear unit time is controlled by a singlechip to regulate temperature.

In the composition temperature limiting circuit, the controller adopts: the variable pulse level on the temperature limiting resistor R is received by the singlechip to control the output period level of the output port a to achieve the temperature limiting function. The temperature limiting function and the temperature regulating circuit have the best use effect.

Principle of temperature regulation: referring to fig. 2, the circuit formed by the temperature limiting resistor R except that the resistance value of the temperature limiting resistor R is zero (the temperature limiting resistor R is short-circuited and the receiving port b of the singlechip is not used) is a temperature regulating circuit, and the temperature regulation of the device adopts a plurality of steps, and each step corresponds to a temperature interval.

In the electric blanket series products (hereinafter referred to as appliances), for the appliances with unchanged power P and usage voltage U, the working time is long, the surface temperature of the appliances is high, the working time is short and the surface temperature of the appliances is low under the same external temperature and heat preservation conditions. According to the working state, the corresponding temperature adjustment of the device adopts the function of changing the ratio of consumed electric energy of the appliance in unit working time (heating time and non-heating time of each corresponding gear) to achieve temperature adjustment, and the principle analysis is as follows:

if the power supply is U, the heating power is P, the working gear (temperature interval) of the controller is x (x is 1-10, or more gears can be taken), the heating time of the corresponding x gear is tax, the non-heating time is tbx, the (tax+tbx) is the working period of the x gear, the cycle time of the period (tax+tbx) is t i, and the average power of each period is: p×tax/(tax+tbx), according to the energy formula: w=p×t, and the power consumed by the appliance x in the cycle operation time of t i is:

Wx＝P×tax/(tax+tbx)×t i……(1)

the above formula (1) shows that under the condition that the power P is unchanged, the working period (txa +txb) and the circulation running time ti of the x gear of the controller are changed, so that the electric energy consumed by the x gear of the device can be easily changed, the temperature of the x gear of the controller can be conveniently adjusted, and the temperature of other gears can be adjusted similarly.

According to ohm law, p=u2/R, R is the load resistance of the device, U is the working voltage of the device, and p=u2/R is substituted into the formula (1) to obtain:

Wx＝U2/R×tax/(tax+tbx)×t i……(2)

the above formula (2) shows that under the condition that the working voltage U is unchanged, the working period (tax+tbx) and the cycle running time t i of the x gear of the controller can be changed easily, so that the electric energy consumed by the x gear of the device can be conveniently adjusted.

Letter and symbol interpretation in formulas (1), (2) above:

wx: the device consumes electric energy (can be a combination of one group or a plurality of groups) in an 'x' gear, and other gears are the same. If x is 1, the device has only one gear (1 temperature interval); if 'x' is taken to be 3, the device has three gears (3 temperature intervals), namely a first gear, a second gear and a third gear, and so on;

p: the power of the device (in the temperature regulating circuit, P is not related to the temperature coefficient of the heating element, and in the temperature controlling circuit, P is related to the temperature coefficient of the heating element);

u: the device uses the voltage of a power supply (U is a constant when in operation);

r: the load resistance of the device (a heating material with a temperature coefficient is needed to be adopted in a temperature control circuit);

(tax+tbx): the duty cycle of the controller of the device in the "x" gear may be a combination of one or more cycles, wherein: the tax corresponds to the heating time (unit: seconds) of the appliance with the x gear, and any 1 number of the tax more than 0 is taken according to the requirement; and the tbx corresponds to the non-heating time (unit: seconds) of the x gear controller, any 1 number of tbx more than or equal to 0 is taken according to the requirement, and when tbx is zero, the device is heated by P power. For example, (ta1x+tb1x) and (ta2x+tb2x) are cyclically operated in two cycles, the expression is { (ta1x+tb1x) + (ta2x+tb2x) }, and so on;

tax/(tax+tbx): the average power factor (may be one or more) of the device, each maximum value being 1; may also be referred to as the duty cycle of the present appliance. For example: the cyclic operation expression of two cycles { (ta1x+tb1x) + (ta2x+tb2x) } is given above, the average power factor is { (ta1x+ta2x)/(ta1x+tb1x+ta2x+tb2x) }, and so on;

t i: corresponding to the time (unit: minutes or hours, unit should be unified when energy is consumed) of the device for circularly running in the period (tax+tbx) of the x gear, other gears are the same. The cycle time t i can be an accumulation of cycle times corresponding to a plurality of cycles. For example: if the cycle time given above for the first period (ta1x+tb1x) operation is t i and the cycle time for the second period (ta2x+tb2x) operation is t i, then the total energy consumed in the x range is: p× { ta1 x/(ta1x+tb1x) × t i 1 +ta2x/(ta2x+tb2x) × t i2}. The other multiple cycles operate similarly, and so on.

The heating time tax, the non-heating time tbx and the cycle time t i of the device in the working period (tax+tbx) of the x gear in the formulas (1) and (2) can be designed into n cycles and a plurality of corresponding cycles by using a program of an output port corresponding to the singlechip in fig. 1, and the formulas (1) and (2) are a group of description from the output port of the singlechip to the executing element, and can be two groups or more of temperature regulation in the same way, and the control mode can be used for physical quantity regulation and control of other electric appliances because the output port outputs a cycle level or a high-low level.

In order to prevent the temperature of the device (the device formed by the temperature regulating circuit) from rising in use, the device can be operated by switching off the working power supply of the device or switching to a low-energy-consumption gear by a singlechip when the highest temperature gear is operated to a dangerous temperature, and the device can also be used together with the temperature limiting function, and the specific implementation method is not described here.

Principle of temperature limitation: (note: temperature limitation means that the device does not generate temperature which is dangerous to the environment and the user or limits the device below a certain set temperature under the abnormal working (such as folding) state, see the functions of each port of the single chip Microcomputer (MCU) in fig. 2 are to output high and low levels or accept high and low levels; the operating circuit and the display circuit in the block diagram are composed of n output ports of the singlechip to select and display temperature gears (temperature intervals); the output port a (one or n) of the singlechip in the block diagram is the high-low level (finished by the program) of the output period, the port b (one or more than 1, embodiment one and embodiment two are 3) for receiving the pulse level of the temperature limiting resistor R controls the period of the output high-low level of the corresponding output port or keeps the original output state (finished by the program), and the temperature limiting principle is as follows: the single chip microcomputer port b (may be a plurality of) in the block diagram is subjected to technical treatment on the pulse level or low level (generated by the resistance value change of the heating material with positive temperature coefficient) of the temperature limiting resistor R (may be a series connection of a plurality of resistors) to control the output periodic level of the output port a (may be a plurality of) to control the on or off of the executing element through the output resistor R0, so that the load is heated electrically or not, and the function of temperature limitation is realized. And (3) injection: the temperature limiting function and the temperature adjusting function are matched for best use.

The temperature regulation and the temperature limitation of the device are achieved by the fact that the output of the output port of the singlechip is a periodic level consisting of an output high level and an output low level, and the output circuit drives the executive component to be conducted or cut off, namely, the load is in two operation working states of full-power heating and heating stopping, so that the control mode of the device in a switching mode can be also called analog temperature control.

In summary, the temperature adjusting and temperature limiting functions of the device can be used independently or in combination. The device is easy and reliable to produce in batch because the power supply voltage is not changed and the heating power is not changed in use, and the temperature limiting circuit for acquiring the temperature change is simple and reliable.

Example 1

Referring to fig. 3, the temperature control electric blanket below or above three steps can be modified by only reducing or adding the indicator lamp and the program.

Circuit diagram connection description: the commercial power is connected with an ax end and a bx end, the ax end is divided into 2 paths, one path is divided into a step-down resistor R1, a diode D1, a voltage stabilizing tube DW and a diode D2, a filter capacitor C1 and an anti-interference capacitor C2 and the bx end, the common connection of a negative electrode of the D1, a negative electrode of the DW and the C1 and the C2 is connected with a pin 4 (positive power supply) of the MCU, and a pin 11 (working ground) of the MCU is connected with the bx end; the other route is connected with one end of the load RL, and the other end of the load RL is connected with the anode of the executive component silicon controlled rectifier V; the negative electrode of the controlled silicon V is connected with one end of a temperature limiting resistor R5 and a resistor R4 and the foot 2 (BH 1) of the MCU; the other end of R5 is connected with one end of a temperature limiting resistor R6 and a pin 14 (BH 2) of the MCU in series, the other end of R6 is connected with one end of a temperature limiting resistor R7 and a pin 13 (BH 3) of the MCU in series, and the other end of R7 is connected with a power bx end; the other end of R4 is connected with the trigger electrode of the silicon controlled rectifier V and one end of the output resistor R3, and the other end of R3 is connected with the pin 1 (OUT 1) of the MCU; the foot 8, the foot 9 and the foot 10 of the MCU are respectively connected with the cathodes of the indicator lamps LED1, LED2 and LED3, the anodes of the three indicator lamps are commonly connected with one end of the resistor R8, and the other end of the resistor R8 is connected with the bx end; one end of AN1 and AN2 is respectively connected with a foot 6 (KEY 1) and a foot 7 (KEY 2) of the MCU, and the other ends of the AN1 and the AN2 are connected with bx ends; the pin 3 (OUT 2) of the MCU is connected with one end of a resistor R2, and the other end of the resistor R2 is connected with the positive electrode of the DW and the positive electrode of the D2.

The following is described in connection with fig. 2: the connection of R1, diode D1, voltage stabilizing tubes DW and D2, filter capacitor C1 and anti-interference capacitor C2 in FIG. 3 forms a2 control circuit working power supply (. Resistor step-down circuit, convenient for patch manufacturing process) to provide the working power supply of 3 SCM MCU; the foot 8, the foot 9 and the foot 10 of the MCU are respectively connected with the cathodes of the indicator lamps LED1, LED2 and LED3, the anodes of the LED1, LED2 and LED3 are connected with the anode of the control power supply through a resistor R8, and three gear display circuits are formed and respectively correspond to a1 gear, a2 gear and a3 gear; the connection of the foot 6 (KEY 1) and the foot 7 (KEY 2) of the MCU and the AN1 and AN2 form AN operation circuit, wherein the KEY AN1 is a power switch button (the circuit adopts that the foot 6 of the MCU receives pulse signals to control AN output port to output low level or high level or each gear to output corresponding periodic level to enable AN execution element to be turned off or on through the output circuit), the KEY AN2 is used for gear selection, the KEY AN2 is used for enabling the foot 7 (KEY 2) to obtain pulse signals to circularly select a1 gear, a2 gear and a3 gear, and corresponding gear indicator lamps LED1, LED2 and LED3 are on, or not on; the foot 2 (BH 1), the foot 14 (BH 2) and the foot 13 (BH 3) of the MCU are high-low level receiving ports, and respectively correspond to and receive temperature limiting resistors (R5+R6+R7), (R6+R7) and R7 in the "1" gear and the "2" gear and the "3" gear, and the level change of the corresponding temperature limiting resistors caused by the change of the load RL temperature is processed by the technology to control the output state of the foot 1 (OUT 1) of the output port of the MCU, and the on and off of an executing element is controlled by the resistor R3, so that the load RL is heated and unheated to achieve the functions of temperature regulation and temperature limitation. The connection of the pin 3 (OUT 2) of the MCU, the resistor R2, the voltage stabilizing tube DW and the diode D2 forms a voltage trimming circuit of the MCU working power supply, and the reliable operation of the temperature limiting circuit is improved. In fig. 3, the connection relationship between the temperature limiting resistor of the "1" gear, the "2" gear, the "3" gear and the receiving port is that the temperature of the "1" gear is the lowest, the temperature of the "3" gear is the highest, and the temperature of the second gear is between the two, wherein the temperature coefficient of the heating material of the load RL is the temperature coefficient.

The operation of the temperature control to select the "3" range is described as follows: the "3" range of fig. 3 has a heating time ta33 (ta 33 is denoted as ta-heating time, 33-total 3 ranges are selected correspondingly, 3 ranges) and a non-heating time tb33 (tb 33 is denoted as tb-non-heating time, 33-total 3 ranges are selected correspondingly). And each port of the MCU of the AN1 singlechip enters a normal working state when the power button is powered on. The operating button AN2 selects the 3 gear, the corresponding indicator lamp LED3 is lighted, the sampling circuit for temperature control consists of a foot 13 (BH 3) of the MCU and a temperature limiting resistor R5, the foot 1 (OUT 1) of the MCU outputs a cycle period of high and low level as (ta33+tb33) and controls the on and off of the silicon controlled rectifier V through the resistor R3, so that the load RL circulates in a period of heating for ta33 seconds and not heating for tb33 seconds. In this cyclic operation, if pin 13 (BH 3) of the MCU receives the level on temperature limiting resistor R5, pin 1 (OUT 1) maintains the output period (ta33+tb33) to be cyclic; in this cyclic operation, if the pin 13 (BH 3) receives the change level on R5 as a low level, the pin 1 (OUT 1) is changed from the output cyclic period (ta33+tb33) to the output low level or a certain cyclic period; during the low output level of the pin 1 (OUT 1) or a certain cycle period, if the pin 13 receives the limit Wen Dianping on R5, the pin 1 (OUT 1) returns to the original cycle period (ta33+tb33) cycle, and so on, so that the "3" gear realizes the limit of the set temperature.

The temperature limitation of the '2' gear and the '1' gear is just that the operation period is different from the heating time relationship of the receiving level port, the temperature limiting resistor and the three gears are as follows: ta33 > ta23 > ta13, the relationship between the unheated time is: and tb33 is less than or equal to tb23 is less than or equal to tb13, and the operation principle is the same as above, and is not described.

In fig. 3, the pin 2 (BH 1), the pin 14 (BH 2) and the pin 13 (BH 3) of the MCU are high-low level receiving ports and corresponding temperature limiting resistors are short-circuited (not used), the pin 3 (OUT 2) and the resistor R2 of the MCU are not used, so that a temperature adjusting circuit is formed, and each gear operation is controlled by the corresponding period output by the pin 1 (OUT 1) of the MCU to turn on and off so that the load RL is heated and not heated to achieve the function of temperature adjustment.

The above figure 3 considers the requirement that the main control circuit board of the device adopts the patch manufacturing process.

The following fig. 5 shows a third embodiment of the device, which is formed by combining two groups of single controls, each group is the same as the principle of fig. 3, only a four-gear and timing selection key is added, and 3 time selections are added at fixed time, and the operation principle is the same as that of the circuit of fig. 3, and is not described here. The temperature control heating time relations of the gears 4, 3, 2 and 1 are as follows: ta44 > ta34 > ta24 > ta14, and the relationship between the unheated time is: tb 44.ltoreq.tb34.ltoreq.tb24.ltoreq.tb14.

The circuit also considers the requirement that the main control circuit board of the control switch is all manufactured by adopting a patch manufacturing process.

Example two

Referring to fig. 4, a circuit diagram connection description is made in conjunction with fig. 1: in fig. 4, the trigger component epsilon cooperates with V1 to provide V2 trigger voltage and forms a full-wave working circuit with V1, and other parts are the same as the function of the temperature regulating circuit of the single-control half-wave three-gear temperature regulating device shown in fig. 3-LED, and will not be described here.

FIG. 4 is a schematic diagram of the trigger assembly epsilon with the 1 foot connected to the positive electrode of V1 except for the 2 feet of the mains supply one way connection assembly epsilon; the negative electrode of V2 is connected with the positive electrode of V1, the trigger electrode of V2 is contacted with 3 pins of the hair component epsilon, the positive electrode of V2 is connected with the outside of bx end, epsilon component P is matched with V1 to provide trigger voltage of V2, so that V2 and V1 form a full-wave control circuit, and other functions of the single-control half-wave three-gear temperature regulation and control device are the same as those of the LED shown in FIG. 3, and are not described.

Example III

See fig. 6 for a connection description in conjunction with fig. 1: the commercial power is connected with an ax end and a bx end, the ax end is divided into 2 paths, a route capacitor C1, resistors R1 and R2, diodes D1 and D2, a voltage stabilizing tube DW, a filter capacitor C2, an anti-interference capacitor C3 and the bx end, the common connection of the DW, the C2 and the C3 is connected with a foot 4 (positive power supply) of an MCU, and a foot 11 (working ground) of the MCU is connected with the bx end; the other path is connected with one end of a load RL, and the other end of the load RL is connected with the anode of an executive component silicon controlled rectifier V; the negative electrode of the controlled silicon V is connected with the positive electrode of the diode D3 and the negative electrode of the diode D4, the negative electrode of the D3 is connected with the pin 7 (BH 1) of the MCU and the temperature limiting resistor R4, and the other end of the R4 is connected with the positive electrode of the D4 and is commonly connected with the bx end; the trigger electrode of the controlled silicon V is connected with one end of an output resistor R3, and the other end of the R3 is connected with a pin 1 (OUT 1) of the MCU; the feet 8, 9, 10, 12, 13 and 14 of MCU are respectively connected with the feet of the nixie tube C, B, AD, E, G, F for displaying the strokes, and the COM feet of the nixie tube are connected with the work corresponding VCC of the control circuit through the resistor R5; one end of AN1 and AN2 is respectively connected with a foot 6 (KEY 1) and a foot 7 (KEY 2) of the MCU, and the other ends of AN1 and AN2 are connected with bx ends.

The following is described in connection with fig. 1: c1, R2, diodes D1, D2, a voltage stabilizing tube DW, a filter capacitor C2 and an anti-interference capacitor C3 in FIG. 4 are connected to form a2 control circuit working power supply (a resistance-capacitance voltage reducing circuit) for providing a working power supply for the 3 single chip microcomputer MCU; the feet 8, 9, 10, 12, 13 and 14 of the MCU are respectively connected with the nixie tube C, B, AD, E, G, F to display strokes, so that six gear display circuits are formed, and the numbers "1", "2", "3", "4", "5" and "6" are respectively displayed correspondingly; the foot 5 (KEY 1) and the foot 6 (the connection of KEY2 and AN1 and AN2 form AN operation circuit, wherein the KEY AN1 is a power switch button (the circuit adopts that the foot 5 of the MCU receives pulse signals to control AN output port to output low level or high level or each gear to output corresponding periodic level, AN executive element controls a silicon controlled rectifier to be cut off or switched on through the output circuit), the KEY AN2 is used for gear selection, and the KEY AN2 is operated to enable the foot 6 (KEY 2) to obtain pulse signals to circularly select the digital 1 gear, 2 gear, 3 gear, 4 gear, 5 gear and 6 gear; the foot 7 (BH 1) of MCU is a high-low level receiving port (one receiving port is adopted) to receive the output state of the foot 1 (OUT) of the output port of MCU controlled by the temperature-limited level of load RL temperature change on a temperature-limited resistor R4, and the on and off of AN executive component is controlled by a resistor R3 to enable the load RL to be heated and not heated to achieve the functions of temperature regulation and temperature control, because the executive component silicon controlled rectifier of the full-wave circuit of FIG. 4 is bidirectional, the diodes D3 and D4 are established by the requirement that the foot 7 (BH 1) of the MCU receives the high-low level and the pulse level reliably, the silicon controlled rectifier V and D3, R4 and the foot 7 (BH 1) of MCU in FIG. 4 and the foot 1 (OUT) of the MCU form a half-wave temperature control circuit, and the bidirectional silicon controlled rectifier V and D4 form another half-wave circuit to form the foot 1 (OUT) control of the MCU, and the two half-wave circuits are combined together The temperature control heating time relationship of the 1 grade is as follows: ta66 > ta56 > ta46 > ta36 > ta26 > ta16, and the relationship between the unheated time is: the operation principle of tb66 less than or equal to tb56 less than or equal to tb46 less than or equal to tb36 less than or equal to tb26 less than or equal to tb16 is the same as that of the circuit of FIG. 3, and will not be described here.

In addition, other devices, such as application specific chips, integrated circuits, etc., may be fabricated using the above principles and with a single circuit or a combination of circuits.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (10)

1. The utility model provides an electric heating appliance that temperature can conveniently be regulated and control, is by heating carrier (1), heating element (2), interface fixed box (3), connection patchcord (4), controller (5), plug cord (6) are constituteed, heating element (2) are installed on heating carrier (1), are for interface fixed box (3) of power in (1) one end of heating carrier to connect controller (5) through connection patchcord (4) to connect the use power through power plug (6), controller (5) include the shell and install the control circuit in it, and control circuit includes working power supply, its characterized in that: the working power supply is used for the singlechip and the working voltage of the operation circuit and the display circuit and the auxiliary circuit which are formed by the singlechip, the periodic level which is formed by the high level and the low level is output by the port output by the singlechip to control the on or off of the executive component, so as to form a temperature regulating circuit and a temperature limiting circuit,

the temperature regulating circuit consists of an operation circuit port c of the singlechip, a port d of the display circuit, an output port a and an output circuit resistor R0 to an executive component;

the temperature limiting circuit is formed by adding a pulse level which is received by a port b of a singlechip and receives a high-low level and is received by a temperature limiting resistor R on the basis of a temperature regulating circuit, and controlling the output state of an output port of the singlechip through technical treatment.

2. The electric heating appliance with temperature convenient to regulate and control according to claim 1, wherein: in the temperature regulating circuit, the output port a of the singlechip outputs one or more periodic levels.

3. The electric heating appliance with temperature convenient to regulate and control according to claim 1, wherein: in the temperature limiting circuit, a port of the singlechip receiving high and low levels processes the received limiting level and the high and low conversion level in the singlechip to change the output state of an output port, and the resistance R0 controls the on and off of an executing element.

4. An electric heating appliance with temperature convenient to regulate and control according to claim 2, characterized in that: the port of the singlechip for receiving the high and low level is one output port or one of more than one output ports.

5. An electric heating appliance with temperature convenient regulation and control according to claim 3, characterized in that: the output port a of the singlechip is one output port or one of two or more output ports.

6. An electric heating appliance with temperature convenient regulation and control according to claim 3, characterized in that: the executive component mainly comprises a silicon controlled rectifier, a field effect transistor, a switch tube and a relay.

7. An electric heating appliance with temperature convenient regulation and control according to claim 3, characterized in that: the working voltage of the singlechip is provided with a trimming voltage circuit, the working voltage is adjusted, and the singlechip is matched with the pulse voltage change on the temperature limiting resistor R, receives from any port of the singlechip and outputs a low-level signal or a high-level signal from an output port through internal processing, so as to control the cut-off or the conduction of the executive component.

8. The electric heating appliance with temperature convenient to regulate and control according to claim 1, wherein: the power supply can be one of alternating current, direct current and mobile power supply.

9. The electric heating appliance with temperature convenient to regulate and control according to claim 1, wherein: the heating element (2) is composed of a single heating wire or a heating sheet, and the structure of the heating element is one of a single spiral wire, a straight wire, a carbon fiber wire, a carbon film and a graphene film.

10. The electric heating appliance with temperature convenient to regulate and control according to claim 1, wherein: the interface contacts of the interface fixing box (3) are singly controlled to be two, and the number of the interface contacts is two and the number of the interface contacts of the interface fixing box is three.