CN205299854U - Power continuously adjustable electricity heating system - Google Patents
Power continuously adjustable electricity heating system Download PDFInfo
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- CN205299854U CN205299854U CN201521134112.2U CN201521134112U CN205299854U CN 205299854 U CN205299854 U CN 205299854U CN 201521134112 U CN201521134112 U CN 201521134112U CN 205299854 U CN205299854 U CN 205299854U
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Abstract
The utility model relates to an electric heater unit. The utility model provides a power continuously adjustable electricity heating system, including electric heating circuit, power module, voltage detection unit, duty cycle calculating unit and duty cycle modulated circuit, voltage detection unit is connected with power module and duty cycle calculating unit respectively, and duty cycle calculating unit and duty cycle modulated circuit are connected, and duty cycle modulated circuit and power module are connected, and power module and electric heating circuit are connected. Realized according to the difference change between current temperature and the target temperature, adjusted heating device's power output in real time to reach and improve the effect that heats comfort level, improvement air conditioner efficiency, improves product life and reduction energy consumption. Be applicable to the air conditioner, electric heater and electric blanket.
Description
Technical field
This utility model relates to electric heater unit, particularly to power continuously adjustabe electric heater unit.
Background technology
In the electric equipment products such as air conditioner and electric heater, all there is multi-form electrical heating at present as main or auxiliary heat generation device, heat and can pass through heat pump air conditioner, it is also possible to directly use electric heater to realize, or the two haves both at the same time. Wherein electrical heating is usually to put into or not investing method, for air-conditioning heat pump work, has out such as 1000W electrical heating or does not open two states, and electrical heating has mechanical temperature controller and fuse protection. Air outlet structure of air conditioner indoor unit is generally adopted working of plastics, owing to air-conditioning heat pump itself has the output of bigger heating capacity, along with indoor temperature raises, after superposition electrical heating temperature rise, under some operating mode, air conditioning exhausting temperature can exceed plastic deformation temperature, it is therefore desirable to exits (cut-out) electrical heating. When such as heating, when indoor apparatus of air conditioner coil temperature is lower than 45 degree, open electrical heating, exit electrical heating when indoor set coil temperature is higher than 55 degree. Exit due to electrical heating and can cause that leaving air temp and heating capacity are decreased obviously, indoor temperature is produced larger fluctuation, comfortableness can be made to be greatly reduced. Existing electrical heating selects, owing to being limited by operation type practical situation, generally not can select that excessive, otherwise can be easily caused electrical heating protection itself, it is easy to exit electrical heating. Owing to electrical heating its own mechanical formula temperature controller is bimetal contact, opening and closing number of times is limited, it is easy to cause the open circuit of electrical heating own, thus losing efficacy. For avoiding the occurrence of the temperature controller Problem of Failure of electrical heating own, general consideration electrical heating working range can increase the test of a lot of limiting condition, the electrical heating temperature range of operation insured most is selected in numerous test results, thus forming electrical heating to run control law, the i.e. minimum range of operation of electrical heating, restriction electrical heating puts into situation significantly.
Domestic air conditioning (on-hook or cabinet-type air conditioner) in the market all adopts the control system and method for non-adjustable power electric heating tube output to improve heats. When heating when indoor coil pipe or air-conditioning intake air temperature are lower than certain value, opening electrical heating, reach certain value and turn off electrical heating, namely electrically heated power is non-adjustable.But Problems existing has: owing to China is vast in territory, day and night temperature is bigger; Simultaneously because heat pump and electrical heating are opened; indoor temperature can gradually rise, and declines with outdoor temperature, and indoor temperature raises; heat pump pressure differential becomes big; heat pump ability gradually reduces, and finally promotes in room temperature or maintains and relies primarily on electrical heating and put into, but now due to temperature superimposition; easily reach protection and exit electrical heating condition; if now suitably regulating and reducing electrical heating operating power, so it does not trigger protection, reach to promote or maintain the effect of indoor temperature. Heat pump air conditioner user needs so a air-conditioning in the high place of temperature, and it is relatively low that electrical heating puts into power ratio, and in the place that temperature is low, it is higher that electrical heating puts into power ratio; So can meet user for ambient-temp-stable comfortableness requirement. Current market, but without solving above-mentioned technical problem.
Utility model content
Technical problem to be solved in the utility model, just it is to provide a kind of power continuously adjustabe electric heating system, corresponding software is added to realize changing according to the difference between Current Temperatures and target temperature during use, adjust the power output of heater in real time, heat comfort level, raising air-conditioning efficiency, raising life of product thus reaching to improve and reduce the effect of energy consumption.
This utility model solves described technical problem, employed technical scheme comprise that, power continuously adjustabe electric heating system, including electric heating circuit, power module, voltage detection unit, dutycycle computing unit and duty ratio modulation circuit, described voltage detection unit is connected with power module and dutycycle computing unit respectively, dutycycle computing unit is connected with duty ratio modulation circuit, and duty ratio modulation circuit is connected with power module, and power module is connected with electric heating circuit.
Concrete, also including human-computer interaction module, human-computer interaction module is connected with dutycycle computing unit;
Concrete, also including temperature sensor one, described temperature sensor one is connected with dutycycle computing unit;
Described temperature sensor one, is used for detecting electric heating circuit real time temperature, and is transmitted to dutycycle computing unit;
Described dutycycle computing unit, for calculating the real-time temperature difference according to electric heating circuit real time temperature and target temperature, and calculating real-time dutycycle according to the real-time temperature difference in conjunction with real-time input voltage value and realtime power difference, described real-time dutycycle is poor to the real-time temperature difference and realtime power to be directly proportional;
Described duty ratio modulation circuit, for the output according to real-time duty ratio modulation power module.
Concrete, also including temperature sensor two, described temperature sensor two is connected with dutycycle computing unit;
Described temperature sensor two, is used for detecting electric heating circuit temperature, and is transmitted to dutycycle computing unit;
Described dutycycle computing unit, for electric heating circuit temperature is compared with the electric heating circuit temperature upper limit preset, when electric heating circuit temperature is higher than the electric heating circuit temperature upper limit preset, system reduces current system by the reduction amplitude preset and runs dutyfactor value;
Being additionally operable to compare electric heating circuit temperature with the electric heating circuit lowest temperature value preset, when electric heating circuit temperature is lower than heating element temperature lower limit, system strengthens current system by the rising amplitude preset and runs dutyfactor value.
Concrete, described electric heating circuit includes thermal fuse-link one, U-shaped add heat pipe one, temperature controller one, thermal fuse-link two, U-shaped add heat pipe two and temperature controller two, one end of described thermal fuse-link one is connected with the live wire end of alternating current power supply, the other end of thermal fuse-link one is connected with U-shaped one end adding heat pipe one, one end of the U-shaped other end and temperature controller one adding heat pipe one is connected, the other end of temperature controller one is connected with the zero line side of alternating current power supply respectively with one end of temperature controller two, the other end of temperature controller two is connected with U-shaped one end adding heat pipe two, one end of the U-shaped other end and thermal fuse-link two adding heat pipe two is connected, the other end of thermal fuse-link two is connected with the live wire end of alternating current power supply.
Concrete, described power module is alternating current power supply, described duty ratio modulation circuit includes bidirectional triode thyristor, bidirectional triode thyristor driving control unit and resistance one, one end of described resistance one is connected with the live wire end of alternating current power supply, the other end of resistance one is connected with one end of bidirectional triode thyristor, the other end of bidirectional triode thyristor is connected with the zero line side of alternating current power supply, bidirectional triode thyristor driving control unit respectively with bidirectional triode thyristor control end and dutycycle computing unit be connected.
Concrete, the described bidirectional triode thyristor driving control unit twice that control frequency is alternating current power supply operating frequency to bidirectional triode thyristor.
Concrete, described power module is DC source, described duty ratio modulation circuit includes insulated gate bipolar transistor one, insulated gate bipolar transistor two, electric capacity, inductance one, resistance three, diode one, diode two, diode three, diode four, diode five, pfc controller, insulated gate bipolar transistor driving control unit, described insulated gate bipolar transistor driving control unit is connected with the grid of dutycycle computing unit and insulated gate bipolar transistor one respectively, the emitter stage of insulated gate bipolar transistor one respectively with one end of electric capacity, the emitter stage of insulated gate bipolar transistor two, the positive pole of diode one and the positive pole of diode two connect, the negative pole of diode one is connected with the live wire end of alternating current power supply and the positive pole of diode three respectively, the negative pole of diode two is connected with the positive pole of the zero line side of alternating current power supply and diode four respectively, the negative pole of diode four is connected with one end of the negative pole of diode three and inductance one respectively, the other end of inductance one is connected with the positive pole of the colelctor electrode of insulated gate bipolar transistor two and diode five respectively, the grid of insulated gate bipolar transistor two is connected with pfc controller, the negative pole of diode five is connected with one end of the other end of electric capacity and resistance three respectively, the other end of resistance three is connected with the colelctor electrode of insulated gate bipolar transistor one.
Concrete, also including protection module, described protection module is connected with dutycycle computing unit and duty ratio modulation circuit respectively.
Concrete, also include temperature sensor three and alarm module; Described temperature sensor three is arranged on electric heating circuit, and is connected with alarm module.
The beneficial effects of the utility model are: this utility model, after during use, system increases corresponding software, system detects the difference of current environment power and target power or electric heating circuit limit maximum power value in real time, when difference power is bigger, system improves the dutycycle of power supply input modulating wave, thus heightening input power, make room temperature quickly, stably reach target temperature value; When difference power is less, system reduces modulating wave dutycycle, thus reducing input power, reducing electrically heated power and putting into, meeting user for ambient-temp-stable comfortableness requirement; Simultaneously, due to temperature of heating member too high time, it is easily deformed, system also detects temperature of heating member in real time, and heating element temperature is compared with the heating element temperature higher limit preset, when heating element temperature is higher than the heating element temperature higher limit preset, system reduces current system by the reduction amplitude preset and runs dutyfactor value, reduces input power; When heating element temperature is lower than heating element temperature lower limit, system strengthens current system by the rising amplitude preset and runs dutyfactor value, improves input power, to reach the effect of quickly heating; Reach to improve life of product, reduce the effect of energy consumption.
Accompanying drawing explanation
Fig. 1 be this utility model power continuously adjustabe electric heating system and control method thereof embodiment in heating circuit structure figure;
Fig. 2 be this utility model power continuously adjustabe electric heating system and control method thereof embodiment in narrow voltage homoiothermic block diagram;
Fig. 3 be this utility model power continuously adjustabe electric heating system and control method thereof embodiment in Width funtion homoiothermic block diagram; Wherein, U-shaped add heat pipe one U1, U-shaped add heat pipe two U2, insulated gate bipolar transistor one IGBT1, insulated gate bipolar transistor two IGBT2, electric capacity C, inductance one L1, resistance three R3, diode one D1, diode two D2, diode three D3, diode four D4, diode five D5.
Below in conjunction with the detailed description of the invention of embodiment, foregoing of the present utility model is described in further detail again. But this should not being interpreted as, the scope of the above-mentioned theme of this utility model is only limitted to Examples below. Without departing from the above-mentioned technological thought situation of this utility model, the various replacements made according to ordinary skill knowledge and customary means or change, all should include in scope of the present utility model.
Detailed description of the invention
The technical solution of the utility model is described in detail below in conjunction with drawings and Examples:
This utility model relies primarily on electrical heating input for finally promoting in room temperature or maintain in prior art, but now due to temperature superimposition, easily reach protection and the problem exiting electrical heating condition, a kind of power continuously adjustabe electric heating system is provided, including electric heating circuit, power module, voltage detection unit, dutycycle computing unit and duty ratio modulation circuit, described voltage detection unit is connected with power module and dutycycle computing unit respectively, dutycycle computing unit is connected with duty ratio modulation circuit, duty ratio modulation circuit is connected with power module, power module is connected with electric heating circuit. in this utility model, after during use, system increases corresponding software, the difference of detection current environment power and target power or electric heating circuit limit maximum power value in real time, when difference power is bigger, system improves the dutycycle of power supply input modulating wave, thus heightening input power, make room temperature quickly, stably reach target temperature value, when difference power is less, system reduces modulating wave dutycycle, thus reducing input power, reducing electrically heated power and putting into, meeting user for ambient-temp-stable comfortableness requirement, simultaneously, due to temperature of heating member too high time, it is easily deformed, system also detects temperature of heating member in real time, and heating element temperature is compared with the heating element temperature higher limit preset, when heating element temperature is higher than the heating element temperature higher limit preset, system reduces current system by the reduction amplitude preset and runs dutyfactor value, reduces input power, when heating element temperature is lower than heating element temperature lower limit, system strengthens current system by the rising amplitude preset and runs dutyfactor value, improves input power, to reach the effect of quickly heating, reach to improve life of product, reduce the effect of energy consumption.
Embodiment 1
This example is specifically described this utility model content for air conditioning system.
First, for strengthening area of dissipation and being easily installed, the electrical heating that the air-conditioning of this example uses adopts U-shape structure. concrete structure is as shown in Figure 1, including thermal fuse-link one, U-shaped add heat pipe one U1, temperature controller one, thermal fuse-link two, U-shaped add heat pipe two U2 and temperature controller two, one end of described thermal fuse-link one is connected with the live wire end of alternating current power supply, the other end of thermal fuse-link one is connected with U-shaped one end adding heat pipe one, one end of the U-shaped other end and temperature controller one adding heat pipe one U1 is connected, the other end of temperature controller one is connected with the zero line side of alternating current power supply respectively with one end of temperature controller two, the other end of temperature controller two is connected with U-shaped one end adding heat pipe two, one end of the U-shaped other end and thermal fuse-link two adding heat pipe two U2 is connected, the other end of thermal fuse-link two is connected with the live wire end of alternating current power supply.The U-shaped electric heating tube of multistage is mounted side by side on support, draws three joints, two live wires, a null wire shared. So can strengthen area of dissipation, also compare simultaneously and be beneficial to installation.
In prior art, finally promote in room temperature or maintain and rely primarily on electrical heating and put into, but now due to temperature superimposition, it is easy to reach protection and exit electrical heating condition, and causing that the service life of air-conditioning reduces and energy consumption is higher. In fact, electrically heated output is adjustable in, and electrically heated watt level is determined by supply voltage dutycycle height. Theoretical based on this, in order to solve this problem, this example provides a kind of power continuously adjustabe electric heating system, including electric heating circuit, power module, voltage detection unit, dutycycle computing unit and duty ratio modulation circuit, described voltage detection unit is connected with power module and dutycycle computing unit respectively, dutycycle computing unit is connected with duty ratio modulation circuit, and duty ratio modulation circuit is connected with power module, and power module is connected with electric heating circuit; Described voltage detection unit, for detecting the real-time input voltage value of power module, and is transmitted to dutycycle computing unit; Described dutycycle computing unit, for according to the real-time input voltage value of power module and electric heating circuit limit maximum power value, calculating realtime power difference, realtime power difference calculates real-time dutycycle, and described realtime power is poor and real-time dutycycle is directly proportional; And by real-time duty cycle transmissions to duty ratio modulation circuit; Described duty ratio modulation circuit, for the output according to real-time duty ratio modulation power module. When difference power is bigger, system improves the dutycycle of power supply input modulating wave, thus heightening input power, make room temperature quickly, stably reach target temperature value; When difference power is less, system reduces modulating wave dutycycle, thus reducing input power, reducing electrically heated power and putting into, meeting user for ambient-temp-stable comfortableness requirement.
In order to meet user's request further, also including human-computer interaction module in this example, human-computer interaction module is connected with dutycycle computing unit; Described human-computer interaction module, is used for receiving user and inputs target temperature, and calculate target power according to target temperature, and described target temperature is directly proportional to target power; When target power is more than electric heating circuit limit maximum power value, dutycycle computing unit, for the real-time input voltage value according to power module and electric heating circuit limit maximum power value, calculate realtime power difference, realtime power difference calculates real-time dutycycle, and described realtime power is poor and real-time dutycycle is directly proportional; And by real-time duty cycle transmissions to duty ratio modulation circuit; When target power is less than electric heating circuit limit maximum power value, described dutycycle computing unit, for the real-time input voltage value according to power module and target power, calculate realtime power difference, realtime power difference calculates real-time dutycycle, and described realtime power is poor and real-time dutycycle is directly proportional; And by real-time duty cycle transmissions to duty ratio modulation circuit. Calculating the difference between user's request temperature and real time temperature in real time, thus calculating difference power, the size adjustment power supply further according to difference power inputs. Meet user's request further.
Although this example is for air-conditioning, but the heater described by this utility model not only includes air conditioning system, it is also possible to for other firing equipments, for instance electric blanket, electric heater equipment etc.
Embodiment 2
On the basis of embodiment 1, in order to be further ensured that the accuracy that real-time dutycycle is calculated, also including temperature sensor one in this example, temperature sensor one is connected with dutycycle computing unit; Described temperature sensor one, is used for detecting electric heating circuit real time temperature, and is transmitted to dutycycle computing unit; Described dutycycle computing unit, for calculating the real-time temperature difference according to electric heating circuit real time temperature and target temperature, and calculating real-time dutycycle according to the real-time temperature difference in conjunction with real-time input voltage value and realtime power difference, described real-time dutycycle is poor to the real-time temperature difference and realtime power to be directly proportional; Described duty ratio modulation circuit, for the output according to real-time duty ratio modulation power module. Those skilled in the art are it is to be appreciated that temperature difference is directly proportional to difference power, while system is according to difference power computed duty cycle, it is contemplated that temperature difference can so that being accurately calculated of dutycycle. When electric heater unit is devoted oneself to work, voltage detection unit detection power input voltage value, initial temperature in temperature sensor one sensing chamber, dutycycle computing unit calculates initial temperature differences according to initial temperature and target temperature, calculating initial duty cycle according to initial temperature differences, initial power rate variance and alternating current power supply input voltage value, described initial temperature differences, initial power rate variance and alternating current power supply input voltage value are directly proportional to initial duty cycle; Initial duty cycle please being transferred to duty ratio modulation circuit, duty ratio modulation circuit controls alternating current power supply work according to initial duty cycle; After electric heater unit is devoted oneself to work, temperature sensor one detects indoor temperature in real time, dutycycle computing unit calculates the real-time temperature difference of real-time indoor temperature and target temperature, and calculating real-time dutycycle according to the real-time temperature difference, realtime power difference and alternating current power supply input voltage value, the described real-time temperature difference, realtime power difference and alternating current power supply input voltage value are directly proportional to real-time dutycycle; Duty ratio modulation circuit works according to real-time Duty ratio control alternating current power supply, have adjusted output.
The temperature value that system detects according to current voltage instruction, carrier cycle and current power voltage and sensor, it is thus achieved that the first dutyfactor value of modulating wave; Regulate the dutycycle of voltage modulated ripple according to the room temperature of detection and current voltage, dutycycle, target temperature, make room temperature quickly, stably reach setting value. When the outdoor temperature of air-conditioning is lower than a certain numerical value, or the temperature difference more than a certain preset value time, during such as subzero 7 degree, or the condensation temperature of indoor evaporator lower than 45 degree time, just strengthen the numerical value of the first dutycycle, improve output. As for adding amplitude and reducing amplitude, storage can be pre-set by staff according to practical situation.
Wherein, when reaching target upper temperatures from relatively low room temperature, system calculates initial launch dutycycle according to temperature difference size and electric power output voltage situation, namely determines initial output power. Wherein, when the temperature difference is more big, difference power is more big, then when only having output more high (namely dutycycle is more high when stabilized input voltage), guarantee reaches target temperature within the more short time, and its concrete direct ratio function can be determined according to air-conditioning own situation. The temperature difference is detected, it has been found that when real-time Temperature Difference Ratio initial temperature differences between room temperature and target temperature is bigger, in order to reach target temperature faster in real time, system improves dutycycle, namely improve output, improve motor speed so that temperature can comparatively fast promote.Finding in an experiment, the dutycycle improving modulating wave can realize that power is maximum can exceed its rated output power 120%, ranges up to 150%. Meanwhile, when the temperature difference is gradually lowered, in order to enable air-conditioning not continuous service, not hovering around heating-up temperature region exiting, close when causing opening during air-conditioning, system can be gradually lowered dutycycle, thus being gradually lowered air-conditioning work frequency so that air-conditioning can even running.
Although this example is for air-conditioning, but the heater described by this utility model not only includes air conditioning system, it is also possible to for other firing equipments, for instance electric blanket, electric heater equipment etc.
Embodiment 3
This example is on the basis of embodiment 1 and embodiment 2, when solution air-conditioning temperature of heating member is too high, it is easy to the problem of deformation.
In order to solve the problems referred to above, also including temperature sensor two in this example, described temperature sensor two is connected with dutycycle computing unit; Described temperature sensor two, is used for detecting electric heating circuit temperature, and is transmitted to dutycycle computing unit; Described dutycycle computing unit, for electric heating circuit temperature is compared with the electric heating circuit temperature upper limit preset, when electric heating circuit temperature is higher than the electric heating circuit temperature upper limit preset, system reduces current system by the reduction amplitude preset and runs dutyfactor value; Being additionally operable to compare electric heating circuit temperature with the electric heating circuit lowest temperature value preset, when electric heating circuit temperature is lower than heating element temperature lower limit, system strengthens current system by the rising amplitude preset and runs dutyfactor value.
System adjusts the dutyfactor value of modulating wave in real time according to the temperature of heater block, thus realizing regulating the output of air-conditioning, when temperature reaches the heating member deformation upper limit preset, system reduces dutycycle, also output is just reduced, realize reducing temperature climb acceleration, effectively prevent heating member from deforming.
Although this example is for air-conditioning, but the heater described by this utility model not only includes air conditioning system, it is also possible to for other firing equipments, for instance electric blanket, electric heater equipment etc.
Embodiment 4
When using the heating tools such as electric blanket, often there is news report, owing to heat time heating time is long, the problem causing breaking out of fire. In order to solve the problems referred to above. This example, on the basis of embodiment 1,2,3, is additionally provided with temperature sensor three and alarm module; Described temperature sensor three is arranged on electric heating circuit, and is connected with alarm module; Described temperature sensor three, for detecting the real time temperature of electric heating circuit, and is transmitted to alarm module; Described alarm module, the real time temperature of the electric heating circuit for temperature sensor three being detected compares with the alarm temperature lower limit preset, and reports to the police when real time temperature is higher than the alarm temperature lower limit preset, is otherwise failure to actuate. Realize carrying out warning function when temperature is too high, effectively prevent unnecessary loss.
Preferably, described alarm module includes communication module, and when needs are reported to the police, warning message is issued to customer mobile terminal by communication module by system, further ensures the effectiveness of warning.
Embodiment 5
Under considering cost conditions, the optional narrow voltage temp. controllable circuit of duty ratio modulation circuit carries out power continuously adjustabe design, and electrical heating can be made to export rated power when rated voltage and higher voltage at input ac power voltage.
Physical circuit design structure is as shown in Figure 2, including bidirectional triode thyristor S, bidirectional triode thyristor driving control unit and resistance one, one end of described resistance one is connected with the live wire end of alternating current power supply, the other end of resistance one is connected with one end of bidirectional triode thyristor, the other end of bidirectional triode thyristor is connected with the zero line side of alternating current power supply, bidirectional triode thyristor driving control unit respectively with bidirectional triode thyristor control end and dutycycle computing unit be connected.Wherein, the bidirectional triode thyristor driving control unit twice that control frequency is alternating current power supply operating frequency to bidirectional triode thyristor.
Embodiment 6
The duty ratio modulation circuit of this example uses Width funtion temp. controllable circuit design, and electrical heating is when input ac power voltage is lower than its rated value, and combined circuit PFC boost can make alternating current power supply export electrically heated rated power equally.
Physical circuit design structure is as shown in Figure 3, including insulated gate bipolar transistor one IGBT1, insulated gate bipolar transistor two IGBT2, electric capacity C, inductance one L1, resistance three R3, diode one D1, diode two D2, diode three D3, diode four D4, diode five D5, pfc controller, insulated gate bipolar transistor driving control unit (hereinafter referred to as IGBT driving control unit), described IGBT driving control unit is connected with the grid of dutycycle computing unit and insulated gate bipolar transistor one IGBT1 respectively, the emitter stage of insulated gate bipolar transistor one IGBT1 respectively with one end of electric capacity C, the emitter stage of insulated gate bipolar transistor two IGBT2, the positive pole of diode one D1 and the positive pole of diode two D2 connect, the negative pole of diode one D1 is connected with the positive pole of the live wire end of alternating current power supply and diode three D3 respectively, the negative pole of diode two D2 is connected with the positive pole of the zero line side of alternating current power supply and diode four D4 respectively, the negative pole of diode four D4 is connected with one end of the negative pole of diode three D3 and inductance one L1 respectively, the other end of inductance one L1 is connected with the positive pole of the colelctor electrode of insulated gate bipolar transistor two IGBT2 and diode five D5 respectively, the grid of insulated gate bipolar transistor two IGBT2 is connected with pfc controller, the negative pole of diode five D5 is connected with one end of the other end of electric capacity C and resistance three R3 respectively, the other end of resistance three R3 is connected with the colelctor electrode of insulated gate bipolar transistor one IGBT1.
Wherein, alternating current power supply is transformed to DC source after diode one D1, diode two D2, diode three D3, diode four D4, pfc controller be controlled, and when input voltage is lower than electrical heating rated operational voltage, pfc controller boosts; When input voltage is higher than electrical heating rated operational voltage, pfc controller carries out voltage stabilizing control. After electrical heating is devoted oneself to work, detect air temperature and set the temperature difference, adjusting output duty cycle, to regulate temperature rate-of-rise, be rapidly achieved and keep design temperature.
Embodiment 7
In embodiment 1��6, owing to needs calculate real-time dutycycle and are controlled power supply input according to it in electric heater unit, owing to the change of dutycycle is likely to very rapidly and changes small, this Fast transforms can make system aging rapid, reduces the service life of device. In order to solve this problem, this example is provided with on the basis of above-described embodiment 1��6 protection module. Protection module is preset with change in duty cycle threshold value; the subsequent time dutyfactor value calculated for the currently running dutyfactor value of detecting device and dutycycle computing unit compares; if the difference of current duty cycle value and subsequent time dutyfactor value is more than default change in duty cycle threshold value; the duty ratio modulation circuit output according to subsequent time dutyfactor value modulation power source module, otherwise duty ratio modulation circuit keeps currently running dutyfactor value.
In sum, in this utility model, system detects the difference of current environmental temperature and target temperature in real time, and when the temperature difference is bigger, system provides the dutycycle of power supply input modulating wave, thus heightening input power, make room temperature quickly, stably reach target temperature value; When the temperature difference is less, system reduces modulating wave dutycycle, thus reducing input power, reducing electrically heated power and putting into, meeting user for ambient-temp-stable comfortableness requirement; Simultaneously, due to temperature of heating member too high time, it is easily deformed, system also detects temperature of heating member in real time, and heating element temperature is compared with the heating element temperature higher limit preset, when heating element temperature is higher than the heating element temperature higher limit preset, system reduces current system by the reduction amplitude preset and runs dutyfactor value, reduces input power; When heating element temperature is lower than heating element temperature lower limit, system strengthens current system by the rising amplitude preset and runs dutyfactor value, improves input power, to reach the effect of quickly heating; Reach to improve life of product, reduce the effect of energy consumption.
Claims (10)
1. power continuously adjustabe electric heating system, it is characterized in that, including electric heating circuit, power module, voltage detection unit, dutycycle computing unit and duty ratio modulation circuit, described voltage detection unit is connected with power module and dutycycle computing unit respectively, dutycycle computing unit is connected with duty ratio modulation circuit, duty ratio modulation circuit is connected with power module, and power module is connected with electric heating circuit.
2. power continuously adjustabe electric heating system according to claim 1, it is characterised in that also including human-computer interaction module, described human-computer interaction module is connected with dutycycle computing unit.
3. power continuously adjustabe electric heating system according to claim 1 and 2, it is characterised in that also including temperature sensor one, described temperature sensor one is connected with dutycycle computing unit.
4. power continuously adjustabe electric heating system according to claim 3, it is characterised in that also including temperature sensor two, described temperature sensor two is connected with dutycycle computing unit.
5. power continuously adjustabe electric heater unit according to claim 4, it is characterized in that, described electric heating circuit includes thermal fuse-link one, U-shaped add heat pipe one, temperature controller one, thermal fuse-link two, U-shaped add heat pipe two and temperature controller two, one end of described thermal fuse-link one is connected with the live wire end of alternating current power supply, the other end of thermal fuse-link one is connected with U-shaped one end adding heat pipe one, one end of the U-shaped other end and temperature controller one adding heat pipe one is connected, the other end of temperature controller one is connected with the zero line side of alternating current power supply respectively with one end of temperature controller two, the other end of temperature controller two is connected with U-shaped one end adding heat pipe two, one end of the U-shaped other end and thermal fuse-link two adding heat pipe two is connected, the other end of thermal fuse-link two is connected with the live wire end of alternating current power supply.
6. power continuously adjustabe electric heater unit according to claim 5, it is characterized in that, described power module is alternating current power supply, described duty ratio modulation circuit includes bidirectional triode thyristor, bidirectional triode thyristor driving control unit and resistance one, one end of described resistance one is connected with the live wire end of alternating current power supply, the other end of resistance one is connected with one end of bidirectional triode thyristor, the other end of bidirectional triode thyristor is connected with the zero line side of alternating current power supply, bidirectional triode thyristor driving control unit respectively with bidirectional triode thyristor control end and dutycycle computing unit be connected.
7. power continuously adjustabe electric heater unit according to claim 6, it is characterised in that the described bidirectional triode thyristor driving control unit twice that control frequency is alternating current power supply operating frequency to bidirectional triode thyristor.
8. power continuously adjustabe electric heater unit according to claim 5, it is characterized in that, described power module is alternating current power supply, described duty ratio modulation circuit includes insulated gate bipolar transistor one, insulated gate bipolar transistor two, electric capacity, inductance one, resistance three, diode one, diode two, diode three, diode four, diode five, pfc controller, insulated gate bipolar transistor driving control unit, described insulated gate bipolar transistor driving control unit is connected with the grid of dutycycle computing unit and insulated gate bipolar transistor one respectively, the emitter stage of insulated gate bipolar transistor one respectively with one end of electric capacity, the emitter stage of insulated gate bipolar transistor two, the positive pole of diode one and the positive pole of diode two connect, the negative pole of diode one is connected with the live wire end of alternating current power supply and the positive pole of diode three respectively, the negative pole of diode two is connected with the positive pole of the zero line side of alternating current power supply and diode four respectively, the negative pole of diode four is connected with one end of the negative pole of diode three and inductance one respectively, the other end of inductance one is connected with the positive pole of the colelctor electrode of insulated gate bipolar transistor two and diode five respectively, the grid of insulated gate bipolar transistor two is connected with pfc controller, the negative pole of diode five is connected with one end of the other end of electric capacity and resistance three respectively, the other end of resistance three is connected with the colelctor electrode of insulated gate bipolar transistor one.
9. power continuously adjustabe electric heater unit according to claim 3, it is characterised in that also including protection module, described protection module is connected with dutycycle computing unit and duty ratio modulation circuit respectively.
10. power continuously adjustabe electric heater unit according to claim 3, it is characterised in that also include temperature sensor three and alarm module; Described temperature sensor three is arranged on electric heating circuit, and is connected with alarm module.
Priority Applications (1)
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| CN107277953A (en) * | 2017-07-13 | 2017-10-20 | 浙江绍兴苏泊尔生活电器有限公司 | Constant temperature control method for induction cooker and induction cooker |
| CN108811212A (en) * | 2017-05-02 | 2018-11-13 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its method for heating and controlling and heating control apparatus |
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| CN108811212A (en) * | 2017-05-02 | 2018-11-13 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its method for heating and controlling and heating control apparatus |
| CN107277953A (en) * | 2017-07-13 | 2017-10-20 | 浙江绍兴苏泊尔生活电器有限公司 | Constant temperature control method for induction cooker and induction cooker |
| CN107277953B (en) * | 2017-07-13 | 2020-09-01 | 浙江绍兴苏泊尔生活电器有限公司 | Constant temperature control method for induction cooker and induction cooker |
| CN109168204A (en) * | 2018-08-14 | 2019-01-08 | 滁州国康医疗仪器有限公司 | The temprature control method of electric blanket |
| CN109168204B (en) * | 2018-08-14 | 2021-09-07 | 滁州国康医疗仪器有限公司 | Temperature control method of electric blanket |
| CN109282445A (en) * | 2018-09-11 | 2019-01-29 | 广东美的暖通设备有限公司 | Air conditioner and its control method and control device |
| CN114992802A (en) * | 2022-05-16 | 2022-09-02 | 青岛海尔空调电子有限公司 | Heating control method and device for inter-row air conditioner and inter-row air conditioner |
| CN115494894A (en) * | 2022-07-20 | 2022-12-20 | 烯旺新材料科技股份有限公司 | Temperature control method of electric heating assembly |
| CN115494894B (en) * | 2022-07-20 | 2024-01-16 | 烯旺新材料科技股份有限公司 | Temperature control method of electric heating assembly |
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