CN201488193U - Frequency conversion control device of inverter air conditioner - Google Patents

Frequency conversion control device of inverter air conditioner Download PDF

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Publication number
CN201488193U
CN201488193U CN2009201945690U CN200920194569U CN201488193U CN 201488193 U CN201488193 U CN 201488193U CN 2009201945690 U CN2009201945690 U CN 2009201945690U CN 200920194569 U CN200920194569 U CN 200920194569U CN 201488193 U CN201488193 U CN 201488193U
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China
Prior art keywords
heat exchange
fan
control
control module
power transistor
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Expired - Lifetime
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CN2009201945690U
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Chinese (zh)
Inventor
刘阳
李强
叶先锋
严光
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Guangdong Midea Group Wuhu Air Conditioning Equipment Co Ltd
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Guangdong Midea Electric Appliances Co Ltd
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Priority to CN2009201945690U priority Critical patent/CN201488193U/en
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Abstract

The utility model relates to a frequency conversion control device of an inverter air conditioner, which comprises a power transistor (1) connected with a control circuit of the inverter air conditioner through a pin (5), wherein the power transistor (2) is also provided with a radiator; and the radiator comprises a heat exchange element (3) which contacts the power transistor (1). The power transistor (1) is an integrated transistor or a decentralized transistor. The radiator also comprises a fan (4) which is arranged by the side of the heat exchange element (3) and supplies air to the heat exchange element (3). The device ensures that the temperature of the power transistor is in the range allowed by the working by adopting various modes including improving the rotation speed of the heat exchange fan or/and improving the voltage of a cooling fan according to the practical heat generated by the frequency control device and the thermal environment of the frequency control device. The device can prevent the temperature of the power transistor on a control circuit board of the inverter air conditioner from exceeding the set temperature, reduce the power consumption of the fan by controlling the rotating speed of the fan, and meet the requirement of the power transistor on heat dissipation under extreme working conditions.

Description

A kind of frequency-converting control device of convertible frequency air-conditioner
Technical field
The utility model is a kind of frequency-converting control device 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 it is different with traditional fixed frequency air conditioner, convertible frequency air-conditioner adopts the convertible frequency air-conditioner control circuit board, in the operating process of convertible frequency air-conditioner control circuit board, 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 increased, because the rising of power transistor surface temperature, the efficient of power transistor reduced, and became unstable, and under some opposite extreme situations, power transistor self can be burnt out.For addressing this problem, conventional way is fin to be installed come enhance heat on power transistor, 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 convertible frequency air-conditioner control circuit board 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, as Japanese patent application publication No. is disclosed a kind of structure among the 9-236286, it is that the metal heat exchanging part of heat exchanger 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 condensation fan rotation to the condenser air-supply, the air-flow that causes drives the metal heat exchanging part of outdoor air through 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, so air quantity is less relatively, and the occasion of proper medium and small radiator; The frequency changer circuit sheet heat exchanger is introduced condenser side, make and absorb heat through the frequency changer circuit sheet heat exchanger earlier that the air after the heating passes through condenser again, has produced the heat radiation situation variation of condenser at outdoor air, local heat radiation deficiency 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 the 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 cooling fan can lower air quantity, make 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 power transistor service behaviour deterioration; 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 under opposite extreme situations, the ambient temperature height, the heat dissipation capacity that needs is big, and the maximum operating temperature relative fixed of power transistor tolerance, promptly, how further under 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 problem to be solved.
The utility model content
The purpose of this utility model is to consider the problems referred to above and provides a kind of power transistor temperature that can prevent to surpass design temperature, satisfies the frequency-converting control device of the convertible frequency air-conditioner of power transistor heat radiation requirement.The utility model is reasonable in design, and is practical and convenient.
The technical solution of the utility model 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 monoblock type transistor 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 exchange 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.
Above-mentioned heat exchange element is a conductor refrigeration spare, conductor refrigeration spare refrigeration face contacts with power transistor, radiating surface is carried the air enhanced heat exchange by fan, and the electrode input end of conductor refrigeration spare 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 a conductor refrigeration spare, conductor refrigeration spare 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.
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 utility model is taked 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 utility model can prevent that power transistor temperature surpasses design temperature on the convertible frequency air-conditioner control circuit board, 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 utility model 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 has the cutaway view of the monoblock type transistor unit radiator of fan for the utility model;
Fig. 2 has the cutaway view of the distributing transistor unit radiator of fan for the utility model;
Fig. 3 has the cutaway view of the monoblock type transistor unit radiator of fan and refrigerating sheet for the utility model;
Fig. 4 is the block diagram of the control mode of the utility model first embodiment;
Fig. 5 is the block diagram of the control mode of the utility model the 4th embodiment;
Fig. 6 is the control flow chart of the utility model first embodiment;
Fig. 7 is the control flow chart of the utility model the 4th embodiment.
The specific embodiment
Embodiment one:
The structural representation of the utility model first embodiment 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 monoblock type transistor or distributing transistor.In the present embodiment, above-mentioned power transistor 1 is the monoblock type transistor.
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 exchange 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,, and be not arithmetic sum for certain transient current divided by the subduplicate absolute value of transistor unit quantity.The operating frequency of this current value and air-conditioner has relation, and when the design temperature and the environment temperature difference of air-conditioner are bigger, 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, under the constant situation of frequency, the electric current that also can improve through transistor unit guarantees power output.So as can be seen, to adjust heat dissipation capacity be incomplete for the simple operating frequency according to air-conditioner.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 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 the power control part branch;
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 utility model embodiment two heat exchange elements 2 are heat pipe, can comprise a container routinely, as a vacuum metal pipe that seals the volatile fluid such as alcohol airtightly, the liquid of heat pipe partly is close to the heat production element, it is transistor unit, fin or fin that heat pipe enlarges area of dissipation pass through and the air heat exchange, and the heat that absorbs from the heat production element is discharged into the air.Other guide is identical with embodiment one.
Embodiment three:
The structural representation of the utility model embodiment three as shown in Figure 2, cutaway view for the distributing transistor unit radiator that has fan, be with embodiment one difference, transistor unit is a distributing, all transistor units when being provided with radiating surface towards same, and each radiating surface is on the same plane, so that 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 utility model embodiment four as shown in Figure 3,10 is the distributing transistor unit among the figure, 4 is fan, 5 is the pin of monoblock type transistor unit, 7 is the conductor refrigeration sheet, 8 is the positive pole of refrigerating sheet, 9 is the negative pole of refrigerating sheet.When inserting 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 the higher situation of outdoor temperature, under the situation that radiating requirements is big, the temperature difference between transistor acceptable temperature and the outside air temperature is not enough to the diffusing quantity of heat production that removes transistor unit simultaneously.Because the hot side tolerable temperature of refrigerating sheet can be than higher (can select) according to demand, so its heat-sinking capability can improve at 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 that the rotating speed of the open blower fan of the utility model rises is more than 2 times of refrigerating sheet voltage rising ratio, and promptly the ratio of DC voltage improvement value and basic voltage is smaller 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 can satisfy the requirement of heat radiation greater than the twice----33.4% of the ratio of voltage raising.
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 a temp probe.Wherein current value be current value that each transistor unit passes through square, after addition summation,, and be not arithmetic sum for certain transient current divided by the subduplicate absolute value of transistor unit quantity.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 under 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, detect current value once more, 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, promptly 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 the power control part branch;
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 rotation speed of fan control module 120 reduces the rotating speed of blower fan, and control refrigerating sheet voltage control unit 121 reduces the refrigerating sheet supply voltage, reduces power consumption, returns step 1) and continues to detect the current value size.
Embodiment five:
The utility model embodiment five is with the different of embodiment four, replace temperature detecting unit 111 with time setup unit 112, time setting unit 112 by user's setting-up time at interval, after detecting current value and reducing, through the time interval of user's setting, detect current value once more,, reduce the voltage of fan 4 rotating speeds and refrigerating sheet positive and negative polarities if current value still is in situation about reducing.Adopt time set, the user can adjust the time voluntarily according to actual conditions.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 the power control part branch;
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 by time setting unit 112 setting-up times at interval, after detecting current value and reducing, through the time interval of user's setting, detect current value once more, if current value still is in situation about reducing, reduce the voltage of fan 4 rotating speeds and refrigerating sheet positive and negative polarities, adopt time set, the user can adjust the time voluntarily according to actual conditions.

Claims (11)

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).
2. the frequency-converting control device of convertible frequency air-conditioner according to claim 1 is characterized in that above-mentioned power transistor (1) is monoblock type transistor or distributing transistor.
3. the frequency-converting control device of convertible frequency air-conditioner according to claim 2 is characterized in that 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).
4. the frequency-converting control device of convertible frequency air-conditioner according to claim 3 is characterized in that being coated with on the contact-making surface between above-mentioned power transistor (1) and the heat exchange element (3) heat-conducting silicone grease of enhanced heat exchange.
5. the frequency-converting control device of convertible frequency air-conditioner according to claim 4 is characterized in that 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.
6. the frequency-converting control device of convertible frequency air-conditioner according to claim 4 is characterized in that above-mentioned heat exchange element (3) is the heat pipe-type heat exchange element, and wears enhanced heat exchange fin or the rib that increases heat exchange area at augmentation of heat transfer.
7. according to the frequency-converting control device of each described convertible frequency air-conditioner of claim 1 to 6, 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) and rotation speed of fan control module (120), 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).
8. the frequency-converting control device of convertible frequency air-conditioner according to claim 4, it is characterized in that above-mentioned heat exchange element (3) is a conductor refrigeration spare (7), conductor refrigeration spare refrigeration face contacts with power transistor (1), radiating surface is carried the air enhanced heat exchange by fan (4), the electrode input end of conductor refrigeration spare (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.
9. the frequency-converting control device of convertible frequency air-conditioner according to claim 4, it is characterized in that above-mentioned heat exchange element (3) is a conductor refrigeration spare (7), conductor refrigeration spare refrigeration face contacts with power transistor (1), radiating surface contacts with the metal heat exchange element, the metal heat exchange element is carried the air augmentation of heat transfer by fan (4), and wears enhanced heat exchange fin or the rib that increases heat exchange area at augmentation of heat transfer.
10. according to Claim 8 or the frequency-converting control device of 9 described convertible frequency air-conditioners, 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).
11. according to Claim 8 or the frequency-converting control device of 9 described convertible frequency air-conditioners, 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).
CN2009201945690U 2009-09-11 2009-09-11 Frequency conversion control device of inverter air conditioner Expired - Lifetime CN201488193U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101655273A (en) * 2009-09-11 2010-02-24 广东美的电器股份有限公司 Variable frequency control device and variable frequency control method of variable frequency air-conditioner
CN103836761A (en) * 2012-11-20 2014-06-04 珠海格力电器股份有限公司 Working method and working device for air-conditioner and air-conditioner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101655273A (en) * 2009-09-11 2010-02-24 广东美的电器股份有限公司 Variable frequency control device and variable frequency control method of variable frequency air-conditioner
CN101655273B (en) * 2009-09-11 2013-04-17 广东美的电器股份有限公司 Variable frequency control device and variable frequency control method of variable frequency air-conditioner
CN103836761A (en) * 2012-11-20 2014-06-04 珠海格力电器股份有限公司 Working method and working device for air-conditioner and air-conditioner
CN103836761B (en) * 2012-11-20 2016-04-13 珠海格力电器股份有限公司 The method of work of air conditioner, equipment and air conditioner

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