CN101655273B - Variable frequency control device and variable frequency control method of variable frequency air-conditioner - Google Patents
Variable frequency control device and variable frequency control method of variable frequency air-conditioner Download PDFInfo
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- CN101655273B CN101655273B CN 200910192269 CN200910192269A CN101655273B CN 101655273 B CN101655273 B CN 101655273B CN 200910192269 CN200910192269 CN 200910192269 CN 200910192269 A CN200910192269 A CN 200910192269A CN 101655273 B CN101655273 B CN 101655273B
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Abstract
The invention relates to a variable frequency control device and a variable frequency control method of a variable frequency air-conditioner. The variable frequency control device of the variable frequency air-conditioner comprises a power transistor (1), wherein the power transistor (1) is connected with a control circuit of the variable frequency air-conditioner through a pin (5) and is also provided with a heat dissipation device, and the heat dissipation device comprises a heat exchanging element (3) contacting the power transistor (1); the power transistor (1) is an integral type transistor or a distributed type transistor; and the heat dissipation device also comprises a fan (4) arranged beside the heat exchanging element (3) and transmits air to the heat exchanging element (3). According to the actual heat yield and the heat environment of the variable frequency control device, the invention ensures the temperature of the power transistor (1) to be within a temperature range permitted by the work of the power transistor (1) by multiple ways, including the ways of enhancing the rotating speed of a heat exchanging air blower and enhancing the voltage and including the combination way of enhancing the rotating speed of a heat exchanging air blower and enhancing the voltage. The invention can prevent the temperature of the power transistor (1) positioned on a control circuit board of the variable frequency air-conditioner from exceeding preset temperature, reduces the power consumption of the fan by controlling the rotating speed of the fan and meets the requirement forthe heat dissipation of the power transistor (1) under bad working conditions.
Description
Technical field
The present invention is a kind of frequency-converting control device and control method thereof of convertible frequency air-conditioner, belongs to the renovation technique of the frequency-converting control device of convertible frequency air-conditioner.
Background technology
Along with the enhancing of energy-saving and emission-reduction consciousness in the society, convertible frequency air-conditioner becomes domestic consumer and commercial user's selection gradually.But different from traditional fixed frequency air conditioner, convertible frequency air-conditioner adopts the control circuit of variable-frequency air conditioner plate, in the operating process of control circuit of variable-frequency air conditioner plate, heat discharges from power transistor, because along with more powerful transducer air conditioning is used, the capacity of power transistor and heat dissipation capacity also significantly increase.
When release heat in the power transistor increases, and since the rising of power transistor surface temperature, the Efficiency Decreasing of power transistor, and become unstable, in some extreme situation, power transistor self can be burned.For addressing this problem, conventional way is at power transistor fin to be installed to come enhance heat, can be used for small-sized frequency conversion refrigerating plant, but for air-conditioning system, the air-conditioning system indoor cooling condition in summer particularly, because the control circuit of variable-frequency air conditioner plate often is installed in outdoor pusher side, be in just under the higher temperature conditions, because most installation site is in the pipeline side chamber of off-premises station, in the high bad working environments of outdoor temperature, the heat-sinking capability that fin is installed still is apparent not enough, and is easy to cause the power transistor operating temperature too high.
Another kind of mode, be disclosed a kind of structure among the 9-236286 such as Japanese patent application publication No., it is that the metal heat-exchange of heat exchanger partly is put in the cavity of off-premises station blower fan side, the frequency conversion control circuit plate still is placed on the cavity of off-premises station pipeline side, by the condensation fan rotation to the condenser air-supply, the air-flow that causes drives outdoor air through the metal heat-exchange part of heat exchanger, heat exchange that really can the enhanced heat exchange device; But because the relation of arranging, the frequency changer circuit sheet heat exchanger in the condenser side cavity can only be on the dividing plate between the cavity, because this position is near dividing plate, thus the air quantity less, the occasion of proper medium and small radiator; The frequency changer circuit sheet heat exchanger is introduced condenser side, so that absorb heat through the frequency changer circuit sheet heat exchanger first at outdoor air, the air after the heating passes through condenser again, has produced the heat radiation situation variation of condenser, local heat radiation is not enough, causes the imbalance of a direct condensation ability of condensation pass; The blower fan of a lot of frequency-variable air conditioner outdoor machines also adopts converter technique, it is air quantity is regulated blower fan along with the difference of design temperature and indoor temperature rotating speed, but heat dissipation capacity and the air conditioner refrigerating/heating capacity of frequency changer circuit sheet heat exchanger have relation, but also be affected by other factors, such as: behind extraneous supply voltage step-down, outdoor radiation air chance lowers air quantity, so that condensing pressure improve from but the heat dissipation capacity of frequency conversion can obviously increase, and the rotating speed of compressor at this moment may not be very high, the rotating speed of off-premises station blower fan also may not be very high, cause under this operating mode, frequency changer circuit sheet heat exchanger a large amount of used heat that can't shed is so that the power transistor service behaviour is deteriorated; The both sides of dividing plate because frequency conversion control circuit plate and heat exchanger mediate respectively so be easy to the situation that occurs leaking out, make outdoor air enter off-premises station pipeline side, thereby the circuit part of pollution transducer control circuit plate cause operational failure.
Even fan has been taked the rotating speed with delivery situation coupling, but in extreme situation, ambient temperature is high, and the heat dissipation capacity that needs is large, and the maximum operating temperature of power transistor tolerance is relatively fixing, namely, how further in the situation that the heat dissipation capacity of needs increases, the difference between tolerable temperature and the ambient temperature is reducing, raising heat-sinking capability in this case, thereby the working strength that raising equipment can adapt to remains problems to be solved.
Summary of the invention
The object of the invention is to consider the problems referred to above and provide a kind of power transistor temperature that can prevent to surpass design temperature, satisfy the frequency-converting control device of the convertible frequency air-conditioner that the power transistor heat radiation requires.The present invention is reasonable in design, and is practical and convenient.
Another object of the present invention is to provide a kind of control method of frequency-converting control device of simply and easily convertible frequency air-conditioner.
Technical scheme of the present invention is: comprise power transistor, power transistor is connected with the control circuit of convertible frequency air-conditioner by pin, and wherein power transistor also is provided with heat abstractor, and this heat abstractor comprises the heat exchange element that contacts with power transistor.
Above-mentioned power transistor is Planar crystal pipe or distributing transistor.
Above-mentioned heat abstractor also comprises the side that is arranged on heat exchange element, carries the fan of air, enhance heat effect to heat exchange element.
Be coated with the heat-conducting silicone grease of enhanced heat exchange on the contact-making surface between above-mentioned power transistor and the heat exchange element.
Above-mentioned heat exchange element is to wear the enhanced heat exchange fin of increase heat exchange area or the heat exchange element of rib at augmentation of heat transfer.
Above-mentioned heat exchange element is the heat pipe type heat exchanger element, and wears enhanced heat exchange fin or the rib that increases heat exchange area at augmentation of heat transfer.
Above-mentioned heat abstractor also includes cooling control system, this cooling control system comprises current detecting unit, control module and the rotation speed of fan control module that detects by the current value of power transistor, wherein the output of current detecting unit is connected with the input of control module, the output of control module is connected with the input of rotation speed of fan control module, and the output of rotation speed of fan control module is connected with fan.
The control method of above-mentioned cooling control system comprises the steps:
1) current detecting unit is delivered to control module with current signal, when the delivery of power transistor changes, current detecting unit detects the delivery by each power transistor, and the variable signal of will powering is input to the heat abstractor control module from power control part;
When 2) current signal increases, increase rotation speed of the fan, the detected value of the delivery that current detecting unit is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module improved the rotating speed of blower fan, enhance heat;
When 3) current signal reduces, reduce rotation speed of the fan, the detected value of the delivery that current detecting unit is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module 120 reduced the rotating speed of blower fan, reduces power consumption.
Above-mentioned heat exchange element is semiconductor refrigeration member, semiconductor refrigeration member refrigeration face contacts with power transistor, radiating surface is carried the air enhanced heat exchange by fan, and the electrode input end of semiconductor refrigeration member links to each other with the positive pole of power supply, and negative input links to each other with the negative pole of power supply.
Above-mentioned heat exchange element is semiconductor refrigeration member, semiconductor refrigeration member refrigeration face contacts with power transistor, radiating surface contacts with the metal heat-exchange element, and the metal heat-exchange element is carried the air augmentation of heat transfer by fan, and wears enhanced heat exchange fin or the rib that increases heat exchange area at augmentation of heat transfer.
Above-mentioned heat abstractor also includes cooling control system, this cooling control system comprises the current detecting unit that detects by the current value of power transistor, control module, the rotation speed of fan control module, the temperature detecting unit of the transistorized real time temperature of detection power and refrigerating sheet voltage control unit, wherein the output of current detecting unit and temperature detecting unit is connected with the input of control module, the output of control module is connected with the input of rotation speed of fan control module and the input of refrigerating sheet voltage control unit, and the output of rotation speed of fan control module is connected with fan.
The control method of above-mentioned cooling control system comprises the steps:
1) current detecting unit is delivered to control module with current signal, when the delivery of power transistor changes, current detecting unit detects the delivery by each power transistor, and the variable signal of will powering is input to the heat abstractor control module from power control part;
When 2) current signal increases, increase rotation speed of the fan, the detected value of the delivery that current detecting unit is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module improved the rotating speed of blower fan, enhance heat;
When 3) current signal reduces, extract the measured value of temperature detecting unit, measured temperature is input to control module;
4) with the measured temperature of temperature detecting unit and user's design temperature relatively, when measured temperature greater than design temperature, return 3), if measured temperature less than design temperature, carry out next step 5);
5) control the rotating speed that the rotation speed of fan control module reduces blower fan, control refrigerating sheet voltage control unit 121 reduces the refrigerating sheet supply voltage, reduces power consumption, returns step 1) continuation detection current value size.
Above-mentioned heat abstractor also includes cooling control system, this cooling control system comprises current detecting unit, control module, rotation speed of fan control module, time setting unit and the refrigerating sheet voltage control unit that detects by the current value of power transistor, wherein the output of current detecting unit and time setup unit is connected with the input of control module, the output of control module is connected with the input of rotation speed of fan control module and the input of refrigerating sheet voltage control unit, and the output of rotation speed of fan control module is connected with fan.
The control method of above-mentioned cooling control system comprises the steps:
1) current detecting unit is delivered to control module with current signal, when the delivery of power transistor changes, current detecting unit detects the delivery by each power transistor, and the variable signal of will powering is input to the heat abstractor control module from power control part;
When 2) current signal increases, increase rotation speed of the fan, the detected value of the delivery that current detecting unit is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module improved the rotating speed of blower fan, enhance heat;
3) user is by time setting unit setting-up time interval, after detecting current value and reducing, through the time interval of user's setting, again detect current value, if current value still is in situation about reducing, reduce the voltage of rotation speed of the fan and refrigerating sheet positive and negative polarities, the employing time is set, and the user can be according to the actual conditions Self-adjustment time.
The present invention takes various ways according to the actual quantity of heat production of frequency-converting control device and according to the thermal environment of frequency-converting control device, comprise the rotating speed that improves the heat exchange blower fan, improve the voltage of refrigerating sheet and their combining form, come in the temperature range of the residing temperature of guaranteed output transistor for its work permission.The present invention can prevent that control circuit of variable-frequency air conditioner on-board power temperature of transistor from surpassing design temperature, and reduces the fan power consumption by the control rotation speed of the fan, and can both satisfy power transistor heat radiation requirement under bad working environments.The present invention is that a kind of design is ingenious, function admirable, the frequency-converting control device of convenient and practical convertible frequency air-conditioner.
Description of drawings
Fig. 1 is that the present invention is with the cutaway view of the Planar crystal tube elements radiator of fan;
Fig. 2 is that the present invention is with the cutaway view of the distributing transistor unit radiator of fan;
Fig. 3 is that the present invention is with the cutaway view of the Planar crystal tube elements radiator of fan and refrigerating sheet;
Fig. 4 is the block diagram of the control mode of first embodiment of the invention;
Fig. 5 is the block diagram of the control mode of fourth embodiment of the invention;
Fig. 6 is the control flow chart of first embodiment of the invention;
Fig. 7 is the control flow chart of fourth embodiment of the invention.
The specific embodiment
Embodiment one:
The structural representation of first embodiment of the invention as shown in Figure 1, comprise power transistor 1, power transistor 1 is connected with the control circuit of convertible frequency air-conditioner by pin 5, and wherein power transistor 1 also is provided with heat abstractor, and this heat abstractor comprises the heat exchange element 3 that contacts with power transistor 1.
Above-mentioned power transistor 1 is Planar crystal pipe or distributing transistor.In the present embodiment, above-mentioned power transistor 1 is the Planar crystal pipe.
Above-mentioned heat abstractor also comprises the side that is arranged on heat exchange element 3, carries the fan 4 of air, enhance heat effect to heat exchange element 3.
Be coated with the heat-conducting silicone grease of enhanced heat exchange on the contact-making surface between above-mentioned power transistor 1 and the heat exchange element 3.
Above-mentioned heat exchange element 3 is to wear the enhanced heat exchange fin of increase heat exchange area or the heat exchange element of rib at augmentation of heat transfer.In the present embodiment, heat exchange element 3 is for wearing the enhanced heat exchange fin that increases heat exchange area at augmentation of heat transfer.
Above-mentioned heat exchange element 3 is the heat pipe type heat exchanger element, and wears enhanced heat exchange fin or the rib that increases heat exchange area at augmentation of heat transfer.In the present embodiment, heat exchange element 3 is for wearing the enhanced heat exchange fin that increases heat exchange area at augmentation of heat transfer.
Above-mentioned heat abstractor also includes cooling control system, the block diagram of the control mode of this cooling control system as shown in Figure 4, comprise the current detecting unit 110, control module 100 and the rotation speed of fan control module 120 that detect by the current value of power transistor 1, wherein the output of current detecting unit 110 is connected with the input of control module 100, the output of control module 100 is connected with the input of rotation speed of fan control module 120, and the output of rotation speed of fan control module 120 is connected with fan 4.The current value that current detecting unit 110 detects by power transistor 1, wherein current value be current value that each transistor unit passes through square, after addition summation, divided by the subduplicate absolute value of transistor unit quantity, and be not arithmetic sum for certain transient current.The operating frequency of this current value and air-conditioner has relation, and when design temperature and the environment temperature difference of air-conditioner are larger, when the operating frequency of air-conditioner was higher, generally the current value by transistor unit can strengthen; But the situation that a lot of exceptions are also arranged, during such as the voltage step-down of, the external power supply of air-conditioner, in order to safeguard the operating condition of air-conditioner, in the constant situation of frequency, the electric current that also can improve through transistor unit guarantees power output.So can find out, it is incomplete that the simple operating frequency according to air-conditioner is adjusted heat dissipation capacity.Control module 100 obtains the magnitude of current by transistor unit from current detecting unit 110, compares with the magnitude of current that detects before, and according to result relatively, control rotation speed of fan control module 120.Rotation speed of fan control module 120 is according to the instruction of control module 100, raises or lowers the rotating speed of blower fan 4.
The control flow chart of the first embodiment as shown in Figure 6, the control method of above-mentioned cooling control system comprises the steps:
1) current detecting unit 110 is delivered to control module with current signal, when the delivery of power transistor 1 changes, 110 pairs of deliveries by each power transistor of current detecting unit detect, and the variable signal of will powering is input to heat abstractor control module 100 from power control part;
When 2) current signal increases, increase rotation speed of the fan, the detected value of the delivery that current detecting unit 110 is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module 120 improved the rotating speed of blower fan, enhance heat;
When 3) current signal reduces, reduce rotation speed of the fan, the detected value of the delivery that current detecting unit 110 is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module 120 reduced the rotating speed of blower fan, reduces power consumption.
Embodiment two:
The embodiment of the invention two heat exchange elements 2 are heat pipe, can comprise routinely a container, such as a vacuum metal pipe that seals airtightly the volatile fluid such as alcohol, the liquid of heat pipe partly is close to the heat production element, it is transistor unit, heat pipe enlarge the fin of area of dissipation or fin by and air heat-exchange, from the thermal release of heat production element absorption to air.Other guide is identical with embodiment one.
Embodiment three:
The structural representation of the embodiment of the invention three as shown in Figure 2, be the cutaway view with the distributing transistor unit radiator of fan, be with embodiment one difference, transistor unit is distributing, all transistor units when arranging radiating surface towards same, and each radiating surface is on the same plane, in order to reduce the thermal resistance between transistor unit and the heat exchange element.In the present embodiment, each transistor unit can adopt commercially available element, does not need extra customization, needs a plurality of securing members, respectively each transistor closely is fixed on the heat exchange element.
Embodiment four:
The structural representation of the embodiment of the invention four as shown in Figure 3,10 is the distributing transistor unit among the figure, 4 is fan, 5 is the pin of Planar crystal tube elements, 7 is the conductor refrigeration sheet, 8 is the positive pole of refrigerating sheet, 9 is the negative pole of refrigerating sheet.When accessing direct current between the positive pole 8 of refrigerating sheet and the negative pole 9, the one side of refrigerating sheet can be generated heat, and another side can cool off, if the heat of heating face can scatter and disappear, its chill surface can keep lower temperature, as obtaining the temperature lower than extraneous room temperature.Make this chill surface contact with transistor unit, can reduce this transistorized surface temperature, assurance is in contact with it from the transistor unit radiating surface and has certain temperature difference between the face, guarantee under outdoor temperature higher shape condition, in the situation that radiating requirements is large simultaneously, the temperature difference between transistor acceptable temperature and the outside air temperature is not enough to loose quantity of heat production except transistor unit.Because the hot side tolerable temperature of refrigerating sheet can higher (can select) according to demand, so its heat-sinking capability can improve for the adaptability of outdoor temperature.The initial voltage of conductor refrigeration sheet is 12 volts in the present embodiment, the scope of voltage is 12 volts to 15.4 volts, the ratio of boosting is 0-28.3%, after refrigerating sheet voltage improves, heat-transfer capability rises, simultaneously because the power consumption of increase itself, the quantity of heat production of itself also significantly increases, normally dispel the heat in order to reach refrigerating sheet, the rotating speed of blower fan also will rise, and the amplitude that rises is greater than the ascensional range of refrigerating sheet voltage, and the ratio of the rise of rotational speed of the open blower fan of the present invention is more than 2 times of refrigerating sheet voltage rising ratio, and namely the ratio of DC voltage improvement value and basic voltage is less than or equal to the rotation speed of fan improvement value during with basic voltage 1/2 of corresponding rotation speed of fan ratio.In the present embodiment, when opening refrigerating sheet, the rotating speed of corresponding blower fan is 2350 rev/mins, (voltage of increase is 2 volts when the voltage of refrigerating sheet is brought up to 14 volts, with the ratio of 12 volts of initial voltages be 16.7%), rotating speed improves 895 rev/mins and reaches 3245 rev/mins, the rotating speed of raising is that the ratio of initial speed is 895/2350=38.1%, this ratio is greater than the twice of the ratio of voltage raising---and-33.4%, can satisfy the requirement of heat radiation.
Fig. 5 is the block diagram of the control mode of the 4th embodiment, above-mentioned heat abstractor also includes cooling control system, this cooling control system comprises the current detecting unit 110 that detects by the current value of power transistor 1, control module 100, rotation speed of fan control module 120, the temperature detecting unit 111 of the real time temperature of detection power transistor 1 and refrigerating sheet voltage control unit 121, wherein the output of current detecting unit 110 and temperature detecting unit 111 is connected with the input of control module 100, the output of control module 100 is connected with the input of rotation speed of fan control module 120 and the input of refrigerating sheet voltage control unit 121, and the output of rotation speed of fan control module 120 is connected with fan 4.In the present embodiment, temperature detecting unit 111 is temp probe.Wherein current value be current value that each transistor unit passes through square, after addition summation, divided by the subduplicate absolute value of transistor unit quantity, and be not arithmetic sum for certain transient current.The surface temperature of temperature detecting unit 111 detection power transistor units, and according to the rotating speed of relatively controlling fan of this detected temperatures and design temperature, particularly in the situation that current value reduces, because temperature has certain hysteresis quality to heat dissipation capacity, so exist heat dissipation capacity to reduce, but the situation that temperature still remains unchanged, reducing rotation speed of the fan this time can be that temperature further improves, stable unfavorable to transistor power device.The time interval that time setting unit 112 is set by the user, after detecting current value and reducing, the time interval of setting through the user, again detect current value, if current value still is in situation about reducing, reduce fan 4 rotating speeds, time setting unit 112 is used for embodiment five.Control module 100 obtains the magnitude of current by transistor unit from current detecting unit 110, compare with the magnitude of current that detects before, according to result relatively, and the result of time setting unit 112 or temperature detecting unit 111 outputs, control rotation speed of fan control module 120 and refrigerating sheet voltage control unit 121.Rotation speed of fan control module 120 is according to the instruction of control module 100, raises or lowers the rotating speed of blower fan 4; Refrigerating sheet voltage control unit 121 is identical with the control logic of rotation speed of fan control module, instruction according to control module 100, DC voltage between rising or reduction refrigerating sheet 7 positive and negative polarities 8 and 9, DC voltage has facilitation to refrigerating capacity in certain scope, refrigerating sheet produces heat when reducing temperature, namely its heat dissipation capacity can be higher than the heat that absorbs from transistor unit.
Shown in the control flow chart of the 4th embodiment of Fig. 7, the control method of above-mentioned cooling control system comprises the steps:
1) current detecting unit 110 is delivered to control module 100 with current signal, when the delivery of power transistor 1 changes, 110 pairs of deliveries by each power transistor of current detecting unit detect, and the variable signal of will powering is input to heat abstractor control module 100 from power control part;
When 2) current signal increases, increase rotation speed of the fan, the detected value of the delivery that current detecting unit 110 is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module 120 improved the rotating speed of blower fan, enhance heat;
When 3) current signal reduces, extract the measured value of temperature detecting unit 111, measured temperature is input to control module 100;
4) with the measured temperature of temperature detecting unit 111 and user's design temperature relatively, when measured temperature greater than design temperature, return 3), if measured temperature less than design temperature, carry out next step 5);
5) control the rotating speed that rotation speed of fan control module 120 reduces blower fans, control refrigerating sheet voltage control unit 121 reduces the refrigerating sheet supply voltage, reduces power consumption, returns step 1) continuation detection current value size.
Embodiment five:
The embodiment of the invention five is from the different of embodiment four, replace temperature detecting unit 111 with time setup unit 112, time setting unit 112 is by user's setting-up time interval, after detecting current value and reducing, through the time interval of user's setting, again detect current value, if current value still is in situation about reducing, reduce the voltage of fan 4 rotating speeds and refrigerating sheet positive and negative polarities.The employing time is set, and the user can be according to the actual conditions Self-adjustment time.This cooling control system comprises current detecting unit 110, control module 100, rotation speed of fan control module 120, time setting unit 112 and the refrigerating sheet voltage control unit 121 that detects by the current value of power transistor 1, wherein the output of current detecting unit 110 and time setup unit 112 is connected with the input of control module 100, the output of control module 100 is connected with the input of rotation speed of fan control module 120 and the input of refrigerating sheet voltage control unit 121, and the output of rotation speed of fan control module 120 is connected with fan 4.
The control method of above-mentioned cooling control system comprises the steps:
1) current detecting unit 110 is delivered to control module 100 with current signal, when the delivery of power transistor 1 changes, 110 pairs of deliveries by each power transistor of current detecting unit detect, and the variable signal of will powering is input to heat abstractor control module 100 from power control part;
When 2) current signal increases, increase rotation speed of the fan, the detected value of the delivery that current detecting unit 110 is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module 120 improved the rotating speed of blower fan, enhance heat;
3) user is by time setting unit 112 setting-up time intervals, after detecting current value and reducing, through the time interval of user's setting, again detect current value, if current value still is in situation about reducing, reduce the voltage of fan 4 rotating speeds and refrigerating sheet positive and negative polarities, the employing time is set, and the user can be according to the actual conditions Self-adjustment time.
Claims (7)
1. the frequency-converting control device of a convertible frequency air-conditioner, comprise power transistor (1), power transistor (1) is connected with the control circuit of convertible frequency air-conditioner by pin (5), it is characterized in that power transistor (1) also is provided with heat abstractor, this heat abstractor comprises the heat exchange element (3) that contacts with power transistor (1); Above-mentioned heat abstractor also comprises the side that is arranged on heat exchange element (3), carries the fan (4) of air, enhance heat effect to heat exchange element (3); Above-mentioned heat abstractor also includes cooling control system, this cooling control system comprises current detecting unit (110), control module (100) and the rotation speed of fan control module (120) that detects by the current value of power transistor (1), wherein the output of current detecting unit (110) is connected with the input of control module (100), the output of control module (100) is connected with the input of rotation speed of fan control module (120), and the output of rotation speed of fan control module (120) is connected with fan (4).
2. the control method of the frequency-converting control device of described convertible frequency air-conditioner according to claim 1 is characterized in that the control of above-mentioned cooling control system comprises the steps:
1) current detecting unit (110) is delivered to control module with current signal, when the delivery of power transistor (1) changes, current detecting unit (110) detects the delivery by each power transistor, and the variable signal of will powering is input to heat abstractor control module (100) from power control part;
When 2) current signal increases, increase rotation speed of the fan, the detected value of the delivery that current detecting unit (110) is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module (120) improved the rotating speed of blower fan, enhance heat;
When 3) current signal reduces, reduce rotation speed of the fan, the detected value of the delivery that current detecting unit (110) is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal reduced, control rotation speed of fan control module (120) reduced the rotating speed of blower fan, reduced power consumption.
3. the frequency-converting control device of convertible frequency air-conditioner according to claim 1 is characterized in that above-mentioned power transistor (1) is Planar crystal pipe or distributing transistor; Be coated with the heat-conducting silicone grease of enhanced heat exchange on the contact-making surface between above-mentioned power transistor (1) and the heat exchange element (3); Above-mentioned heat exchange element (3) is semiconductor refrigeration member (7), semiconductor refrigeration member refrigeration face contacts with power transistor (1), radiating surface is carried the air enhanced heat exchange by fan (4), the electrode input end of semiconductor refrigeration member (8) links to each other with the positive pole of power supply, and negative input (9) links to each other with the negative pole of power supply.
4. the frequency-converting control device of convertible frequency air-conditioner according to claim 3, it is characterized in that above-mentioned heat abstractor also includes cooling control system, this cooling control system comprises the current detecting unit (110) that detects by the current value of power transistor (1), control module (100), rotation speed of fan control module (120), the temperature detecting unit (111) of the real time temperature of detection power transistor (1) and refrigerating sheet voltage control unit (121), wherein the output of current detecting unit (110) and temperature detecting unit (111) is connected with the input of control module (100), the output of control module (100) is connected with the input of rotation speed of fan control module (120) and the input of refrigerating sheet voltage control unit (121), and the output of rotation speed of fan control module (120) is connected with fan (4).
5. the control method of the frequency-converting control device of described convertible frequency air-conditioner according to claim 4 is characterized in that the control of above-mentioned cooling control system comprises the steps:
1) current detecting unit (110) is delivered to control module (100) with current signal, when the delivery of power transistor 1 changes, current detecting unit (110) detects the delivery by each power transistor, and the variable signal of will powering is input to heat abstractor control module (100) from power control part;
When 2) current signal increases, increase rotation speed of the fan, the detected value of the delivery that current detecting unit (110) is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module (120) improved the rotating speed of blower fan, enhance heat;
When 3) current signal reduces, extract the measured value of temperature detecting unit (111), measured temperature is input to control module (100);
4) with the measured temperature of temperature detecting unit (111) and user's design temperature relatively, when measured temperature greater than design temperature, return 3), if measured temperature less than design temperature, carry out next step 5);
5) control the rotating speed that rotation speed of fan control module (120) reduces blower fan, control refrigerating sheet voltage control unit (121) reduces the refrigerating sheet supply voltage, reduces power consumption, returns step 1) continuation detection current value size.
6. the frequency-converting control device of convertible frequency air-conditioner according to claim 3, it is characterized in that above-mentioned heat abstractor also includes cooling control system, this cooling control system comprises the current detecting unit (110) that detects by the current value of power transistor (1), control module (100), rotation speed of fan control module (120), time setting unit (112) and refrigerating sheet voltage control unit (121), wherein the output of current detecting unit (110) and time setup unit (112) is connected with the input of control module (100), the output of control module (100) is connected with the input of rotation speed of fan control module (120) and the input of refrigerating sheet voltage control unit (121), and the output of rotation speed of fan control module (120) is connected with fan (4).
7. the control method of the frequency-converting control device of described convertible frequency air-conditioner according to claim 6 is characterized in that the control of above-mentioned cooling control system comprises the steps:
1) current detecting unit (110) is delivered to control module (100) with current signal, when the delivery of power transistor 1 changes, current detecting unit (110) detects the delivery by each power transistor, and the variable signal of will powering is input to heat abstractor control module (100) from power control part;
When 2) current signal increases, increase rotation speed of the fan, the detected value of the delivery that current detecting unit (110) is provided, gather and calculate, result and delivery result of calculation are before compared, when current signal increased, control rotation speed of fan control module (120) improved the rotating speed of blower fan, enhance heat;
3) user is by time setting unit (112) setting-up time interval, after detecting current value and reducing, through the time interval of user's setting, again detect current value, if current value still is in situation about reducing, reduce the voltage of fan (4) rotating speed and refrigerating sheet positive and negative polarities, the employing time is set, and the user can be according to the actual conditions Self-adjustment time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910192269 CN101655273B (en) | 2009-09-11 | 2009-09-11 | Variable frequency control device and variable frequency control method of variable frequency air-conditioner |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104035459B (en) * | 2014-06-06 | 2016-05-11 | 广东美的暖通设备有限公司 | The control method of the temperature of frequency converter and described frequency converter |
| CN105020855A (en) * | 2015-07-24 | 2015-11-04 | 广东美的制冷设备有限公司 | Variable frequency air conditioner control method and system |
| CN106247483B (en) * | 2016-08-12 | 2019-09-03 | 青岛海尔空调器有限总公司 | The control method and device of reactor temperature |
| CN106452020A (en) * | 2016-12-02 | 2017-02-22 | 南通沃特光电科技有限公司 | High-voltage frequency converter radiating system |
| CN111414057A (en) * | 2020-03-12 | 2020-07-14 | 苏州浪潮智能科技有限公司 | Fan rotating speed control method and system, electronic equipment and storage medium |
| CN117199029B (en) * | 2023-11-07 | 2024-01-12 | 瑞森半导体科技(广东)有限公司 | Power supply management chip and power supply management method |
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