WO2016127553A1 - 一种变频热泵干衣机膨胀阀控制方法 - Google Patents

一种变频热泵干衣机膨胀阀控制方法 Download PDF

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Publication number
WO2016127553A1
WO2016127553A1 PCT/CN2015/083308 CN2015083308W WO2016127553A1 WO 2016127553 A1 WO2016127553 A1 WO 2016127553A1 CN 2015083308 W CN2015083308 W CN 2015083308W WO 2016127553 A1 WO2016127553 A1 WO 2016127553A1
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Prior art keywords
frequency
expansion valve
opening
compressor
running time
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Ceased
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PCT/CN2015/083308
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English (en)
French (fr)
Inventor
许升
宋华诚
田书君
单世强
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Qingdao Haier Washing Machine Co Ltd
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Qingdao Haier Washing Machine Co Ltd
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Application filed by Qingdao Haier Washing Machine Co Ltd filed Critical Qingdao Haier Washing Machine Co Ltd
Priority to US15/550,203 priority Critical patent/US10494757B2/en
Priority to KR1020177025125A priority patent/KR102344691B1/ko
Priority to EP15881714.8A priority patent/EP3258004A4/en
Priority to JP2017542057A priority patent/JP6596801B2/ja
Publication of WO2016127553A1 publication Critical patent/WO2016127553A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/203—Laundry conditioning arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/30—Drying processes 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/46—Control of the operating time
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/48—Control of the energy consumption
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/52—Preventing or reducing noise
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/50—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to heat pumps, e.g. pressure or flow rate
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/26—Heat pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the invention relates to the field of clothes dryers, in particular to a control method for an expansion valve of a variable frequency heat pump dryer.
  • the adjustment of the expansion valve is generally based on the temperature difference between the inlet and outlet of the evaporator.
  • SH superheat is positive, need to increase the flow rate, and compared with the previous superheat, if the superheat degree becomes smaller, the adjustment force is too small, if compared with the previous superheat, if the superheat degree becomes larger, Then the greater the intensity.
  • the flow rate needs to be reduced, and compared with the previous superheat. If the superheat degree becomes larger, the adjustment force is smaller. If the superheat degree is compared with the previous superheat, if the superheat degree becomes smaller, , the smaller the intensity.
  • This control method ensures that the effective heat exchange area of the evaporator is maximized and the refrigerant in the evaporator is sufficiently evaporated.
  • a temperature sensor needs to be provided on both sides of the evaporator. Increase the type of product electronic control board.
  • the present invention has been made in view of this.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a control method for an expansion valve of a variable frequency heat pump dryer, which eliminates the temperature sensor to adjust the opening degree of the expansion valve according to the parameters of the compressor itself.
  • the present invention adopts the following technical scheme: a variable frequency heat pump dryer expansion valve control method, and the frequency conversion compressor of the dryer comprises an up frequency phase, a frequency maintenance phase and a frequency reduction phase, and the frequency of the inverter compressor is used. / The operating time / power / current parameters of a certain frequency adjust the opening of the electronic expansion valve.
  • the reference value of a certain frequency running time/power/current is set, and the actual value of the frequency running time/power/current of the compressor is compared with the set reference value, if the frequency running time The actual value is less than the set reference value, or the actual value of the power/current is greater than the set reference value, and the opening degree of the expansion valve is increased, if the actual value of the frequency running time is greater than the set reference value, or power The actual value of the /current is less than the set reference value, and the opening degree of the expansion valve is reduced.
  • the operating frequency of the inverter compressor is gradually decreased step by step from the set target frequency, and the opening degree of the expansion valve is correspondingly adjusted stepwise.
  • the dryer includes different drying modes. In different drying modes, if the target running time/power/current of the same frequency is large, the opening of the expansion valve is large.
  • the clothes dryer includes at least a first drying mode and a second drying mode, wherein the high frequency section running time of the compressor in the first drying mode is longer than the high frequency section running of the inverter compressor in the second drying mode Time, the expansion valve opening degree when entering the frequency reduction phase in the first drying mode is greater than the expansion valve opening degree when entering the frequency reduction phase in the second mode.
  • the operating frequency of the inverter compressor drops from the target frequency fnHz to f1 Hz, and the expansion valve opening is adjusted from k1n to k11 pulse opening; in the second drying mode
  • the inverter compressor operating frequency decreases from the target frequency fnHz to f1Hz, and the expansion valve opening degree is adjusted from k2n to k21 pulse opening degree; the T11>T21, k1n>k2n, k11>k21.
  • the adjusting expansion valve is closed to a fully closed state: first, the expansion valve is closed, and then a small opening degree is opened, and then a large opening degree is closed, and the expansion valve is repeatedly closed to ensure that the expansion valve is completely closed.
  • the clothes dryer further includes a third drying mode in which the high frequency segment running time of the compressor is shorter than the high frequency segment running time of the compressor in the second drying mode, In the three-drying mode, the expansion valve opening degree is lower than the expansion valve opening degree when entering the frequency reduction stage in the second mode.
  • the operating frequency of the inverter compressor drops from the target frequency fnHz to f1Hz, and the expansion valve opening is adjusted from k3n to k31 pulse opening; in the second drying mode
  • the inverter compressor operating frequency drops from the target frequency fnHz to f1Hz, and the expansion valve opening is adjusted from k2n to k21 pulse opening; the T21>T31, k2n>k3n, k21>k31.
  • the inverter compressor operating frequency is from f1Hz. Down to f2Hz, the expansion valve opening is adjusted from k11 to k12 pulse opening until the detection temperature rises to T1m °C, the inverter compressor operating frequency is reduced from f2Hz to fmHz, and the expansion valve opening is adjusted from k12 to k1m pulse opening to
  • the operating frequency of the inverter compressor decreases from f1Hz to f2Hz, and the opening degree of the expansion valve is adjusted from k21 to k22 pulse opening; until the detected temperature rises to T2m°C,
  • the operating frequency of the inverter compressor drops from f2Hz to fmHz, and the expansion valve opening is adjusted from k22 to k2m pulse opening; to the end of drying, the T12>T22, T1m>T2m, k
  • the inverter compressor operating frequency decreases from f1 Hz to f2 Hz, and the expansion valve opening degree is adjusted from k31 to k32 pulse opening; until the detected temperature rises to T3m °C, The operating frequency of the inverter compressor drops from f2Hz to fmHz, the opening degree of the expansion valve is adjusted from k32 to the pulse opening of k3m, to the end of the drying, and when the temperature rises to T22°C in the second drying mode, the operating frequency of the inverter compressor is from f1Hz.
  • the expansion valve opening is adjusted from k21 to k22 pulse opening; until the detection temperature rises to T2m °C, the inverter compressor operating frequency decreases from f2Hz to fmHz, and the expansion valve opening is adjusted from k22 to k2m pulse opening to At the end of the drying, the T22>T32, T2m>T3m, k22>k32, k2m>k3m.
  • the expansion valve control method of the present invention does not need to additionally set a temperature sensor, and uses the compressor's own parameters to adjust the opening degree of the expansion valve.
  • the compressor's own parameters can be directly obtained through the inverter of the compressor, so the temperature sensor can be omitted. In part, it is possible to simplify the control part.
  • the dryer of the present invention provides a plurality of dry clothes modes, and the user can select a suitable dry clothes mode according to his own needs, and provides users with more choices, one machine can be applied to different people, and the machine can be improved.
  • the versatility of the dryer, while providing a variety of dry clothes mode, enhances the diversification and flexibility of the dryer, and can meet the needs of people with different needs at different times, and further adapt to people's diversification, high speed,
  • the efficient life rhythm enhances the humanization of the dryer.
  • the inverter compressors are all raised to the set target frequency, and the drying mode is divided by the set target frequency, that is, the running time of the high frequency band, and the plurality of clothes
  • the compressor works at full load, so that the efficiency of the compressor is maximized, the compressor is used to the maximum extent, there is no long-term low-load working efficiency, and there is no long-term high-load operation, which causes damage to the compressor and leads to a decrease in compressor life.
  • the first dry clothes mode in the dry clothes mode of the present invention can solve the problem of quick drying clothes, and is suitable for people who need quick drying clothes
  • the third dry clothes mode can solve the problem of dry clothes noise, and is suitable for not rushing.
  • the clothing speed pays attention to the crowd of dry clothes, and the second drying mode can make the power saving and drying speed match properly. It is suitable for not drying clothes and not being afraid of drying. Clothing noise crowd.
  • Figure 1 Flow chart of the drying mode control in the present invention
  • Figure 2 Relationship between expansion valve opening and drying mode in the present invention
  • Figure 3 Relationship between the opening degree of the expansion valve and the running time of a certain frequency in the present invention
  • Figure 4 Relationship between opening degree and power/current of expansion valve in the present invention
  • the invention relates to a control method for an expansion valve of a variable frequency heat pump dryer, and the frequency conversion compressor of the dryer comprises an up frequency phase, a frequency maintenance phase and a frequency reduction phase, and uses an inverter compressor operating frequency/a certain frequency running time/ Parameters such as power/current adjust the opening of the electronic expansion valve.
  • the compressor's own parameters are used to adjust the expansion valve opening degree.
  • the compressor's own parameters can be directly obtained by the compressor's inverter, so the temperature sensor can be omitted to detect the temperature part, which can simplify the control part.
  • the running time of the certain frequency is the time for the inverter compressor to stably operate at a frequency within the operating frequency range.
  • the comparison of the reference values can control the opening of the expansion valve, and the control is simple. In the same mode, if the running time of a certain frequency is long, the temperature rises slowly, because the final temperature setting is the same, the opening should be adjusted. But in different dry mode, if A certain frequency has a long running time, and its final temperature/power/current is high, and its reference expansion valve opening is high at this frequency.
  • the inverter compressor of the dryer comprises an up-conversion phase, a frequency-holding phase and a frequency-down phase.
  • the inverter compressor operating frequency is gradually decreased from the set target frequency, and the expansion valve opening corresponds to the phase turn up.
  • the reference running time/power/current of a certain frequency is different.
  • the longer the reference running time of a certain frequency the larger the opening degree of the expansion valve in the same frequency range compared with other modes; the mode in which the reference target power/current of a certain frequency is larger, the opening of the expansion valve in the same frequency range as the other modes The greater the degree.
  • the opening degree of the reference expansion valve opening is adjusted in this mode.
  • the clothes dryer includes at least two drying modes: a first drying mode and a second drying mode, in which the high frequency section of the compressor runs longer than the second The high frequency section running time of the inverter compressor in the dry mode, the expansion valve opening degree when entering the frequency down phase in the first dry clothes mode is greater than the expansion valve opening degree when entering the frequency down phase in the second mode.
  • the dry clothes speed of the first dry clothes mode is faster than the dry clothes speed of the second dry clothes mode, and the power consumption of the second dry clothes mode is lower than that of the first dry clothes mode, and the user can according to his actual situation.
  • the control panel has a control button for the dry mode, and the user selects the dry mode through the panel button.
  • the frequency or speed at which the fan operates in the first dryer mode is higher than or equal to the frequency or speed at which the fan operates in the second dryer mode.
  • the frequency or speed of the fan running in the first drying mode is higher than the frequency or speed of the fan running in the second drying mode, and the circulation of the air takes away the hot and humid gas in the cylinder and brings it into the dry hot air, thereby The moisture in the underwear is taken away, and the higher the frequency or speed of the fan operation, the faster the air circulation, the easier it is to take away the moisture in the underwear, and the drying speed is faster.
  • the inverter compressor includes an up-conversion phase, a frequency-maintaining phase, and a frequency-reduction phase: after the compressor is started, the compressor operating frequency is gradually increased from a low frequency to a maximum operating frequency, that is, a target frequency is set, instead of directly operating at a maximum operating frequency.
  • the operating frequency of the inverter compressor can also be divided into multiple stages. After rising to each frequency stage, it will run for 0.5 to 3 minutes and then rise to another frequency stage.
  • the rising speed is 1 Hz/s to 1 Hz/60 s; (for example, 28) ⁇ 40Hz/s; 40 ⁇ 50Hz/s; 50 ⁇ 60Hz/s;), the maximum speed is not directly raised here: to prevent the oil inside the compressor from returning from the heat exchanger after the frequency, that is, the sudden increase of the speed
  • the amount of oil in the compressor is less than the amount of oil discharged, resulting in poor lubrication and increased wear on the components inside the compressor. Preventing the refrigerant from completely evaporating at the beginning of the evaporator, causing the liquid refrigerant to enter the compressor, diluting the lubricating oil inside the compressor, resulting in poor lubrication.
  • the compressor operating current I is monitored and the condenser surface reflecting the condensing temperature is monitored.
  • the inverter compressors are all raised to the set target frequency, that is, the compressor is working at full load, so that the efficiency of the compressor is maximized and the compressor is used to the maximum extent.
  • the compressor When the compressor reaches the set target frequency or reaches the maximum frequency required by the limit, it enters the frequency hold phase and operates according to the set target frequency or the highest frequency required to reach the limit.
  • the operating frequency of the inverter compressor decreases from the target frequency fnHz to f1 Hz, and the expansion valve opening degree is adjusted from k1n to k11 pulse opening degree; the second drying mode
  • the inverter compressor operating frequency decreases from the target frequency fnHz to f1Hz, and the expansion valve opening is adjusted from k2n to k21 pulse opening; the T11>T21, k1n>k2n, k11>k21.
  • the operating frequency of the inverter compressor decreases from f1 Hz to f2 Hz, and the opening degree of the expansion valve is adjusted from k11 to k12 pulse opening until the detected temperature rises to T1m °C.
  • the operating frequency of the inverter compressor drops from f2Hz to fmHz, the opening degree of the expansion valve is adjusted from k12 to the pulse opening of k1m, to the end of the drying, and when the temperature rises to T22°C in the second drying mode, the operating frequency of the inverter compressor is from f1Hz.
  • the expansion valve opening is adjusted from k21 to k22 pulse opening; until the detection temperature rises to T2m °C, the inverter compressor operating frequency decreases from f2Hz to fmHz, and the expansion valve opening is adjusted from k22 to k2m pulse opening; At the end of the drying, the T12>T22, T1m>T2m, k12>k22, k1m>k2m.
  • the k1n ⁇ k11 ⁇ k12, k2n ⁇ k21 ⁇ k22, the inverter compressor operating frequency is gradually decreased stepwise from the set target frequency, and the expansion valve opening degree is adjusted stepwise.
  • the expansion valve When the dryer starts running, adjust the expansion valve to the fully closed state, then open to the first opening degree, the compressor starts, and after the compressor is finished up, the expansion valve opens to the second opening degree and enters the frequency maintenance phase.
  • the expansion valve is first closed, and then a small opening is opened to close a large opening, and the rotation is repeated several times to ensure that the expansion valve is completely closed.
  • the expansion valve first performs a full-close operation. If the maximum opening is 500 pulses, the 500 pulses are first turned off, then 5 pulses are turned on, and the 60 pulses are turned off 5 times to ensure that the expansion valve is completely closed.
  • the expansion valve opens to the initial position of 100 pulse opening and the compressor is started. After the compressor is over frequency up, the expansion valve opens to an initial position of 200 pulse opening. Enter the frequency retention phase.
  • the clothes dryer further includes a third drying mode in which the high frequency section running time of the compressor is shorter than the high frequency section of the compressor in the second drying mode Running time, entering in the third drying mode
  • the expansion valve opening degree in the down-conversion phase is smaller than the expansion valve opening degree in the second mode when entering the down-conversion phase.
  • the drying speed of the third drying mode is slower than the drying speed of the second drying mode, but the noise of the third drying mode is lower than that of the second drying mode, and the user can according to his actual situation.
  • Select the dry mode the control panel has a control button for the dry mode, and the user selects the dry mode through the panel button.
  • the frequency or speed at which the fan operates in the third dryer mode is lower than the frequency or speed at which the fan operates in the second dryer mode. Can further reduce noise.
  • the operating frequency of the inverter compressor drops from the target frequency fnHz to f1Hz, and the expansion valve opening is adjusted from k3n to k31 pulse opening; in the second drying mode
  • the inverter compressor operating frequency drops from the target frequency fnHz to f1Hz, and the expansion valve opening is adjusted from k2n to k21 pulse opening; the T21>T31, k2n>k3n, k21>k31.
  • the inverter compressor operating frequency decreases from f1 Hz to f2 Hz, and the expansion valve opening degree is adjusted from k31 to k32 pulse opening; until the detected temperature rises to T3m °C, The operating frequency of the inverter compressor drops from f2Hz to fmHz, the opening degree of the expansion valve is adjusted from k32 to the pulse opening of k3m, to the end of the drying, and when the temperature rises to T22°C in the second drying mode, the operating frequency of the inverter compressor is from f1Hz.
  • the expansion valve opening is adjusted from k21 to k22 pulse opening; until the detection temperature rises to T2m °C, the inverter compressor operating frequency decreases from f2Hz to fmHz, and the expansion valve opening is adjusted from k22 to k2m pulse opening to At the end of the drying, the T22>T32, T2m>T3m, k22>k32, k2m>k3m.
  • the k3n ⁇ k31 ⁇ k32, the operating frequency of the inverter compressor is gradually decreased step by step from the set target frequency, and the opening degree of the expansion valve corresponds to a stepwise adjustment.
  • the first drying mode the opening of the expansion valve is larger than the opening of the same frequency segment in other modes, the flow rate is large, and the pressure drop is small.
  • the expansion valve opens to the initial position 210 pulse opening. Enter the frequency retention phase.
  • the operating frequency of the inverter compressor enters the frequency reduction phase.
  • the frequency decreases from the target speed of 60 Hz to 50 Hz, and the expansion valve opening is adjusted to 230 pulse opening; when the condenser surface rises to 52 ° C
  • the frequency is reduced from 50Hz to 40Hz, the expansion valve opening is adjusted to 250 pulse opening; when the condenser surface rises to 57°C, the frequency is reduced from 40Hz to 30Hz, and the expansion valve opening is adjusted to 270 pulse opening; 30Hz runs to the end of drying.
  • the second drying mode the condensing temperature corresponding to each frequency segment of the compressor is lower than the first drying mode, so that the compressor enters the low frequency running stage as soon as the target condensing temperature is lowered, the temperature of the laundry in the drum is low, and the evaporator is in the frequency conversion
  • the refrigerant running in the same operating frequency range of the compressor has less refrigerant, and the opening degree of the expansion valve is smaller than the setting of the same frequency segment in the first mode, the flow rate is small, and the pressure drop is large.
  • the expansion valve opens to an initial position of 200 pulse opening.
  • the third drying mode the condensing temperature corresponding to each frequency segment of the compressor is lower than the second drying mode, so that the compressor enters the low frequency running phase as soon as the target condensing temperature is lowered, the temperature of the laundry in the drum is low, and the evaporator is in the frequency conversion
  • the refrigerant running in the same operating frequency range of the compressor has less refrigerant, and the opening degree of the expansion valve is smaller than the setting of the same frequency segment in the second mode, the flow rate is small, and the pressure drop is large.
  • the expansion valve opens to an initial position of 190 pulse opening. Enter the frequency retention phase.
  • the frequency drops from the target speed of 60 Hz to 50 Hz, and the expansion valve opening is adjusted to 210 pulse opening; when the surface of the condenser rises to 37 ° C, the frequency decreases from 50 Hz to 40 Hz, and the expansion The valve opening is adjusted to 230 pulse opening; when the condenser surface rises to 42 ° C, the frequency is reduced from 40 Hz to 30 Hz, and the expansion valve opening is adjusted to 250 pulse opening; at 30 Hz to the end of drying.
  • 1 is the fast drying mode curve
  • 2 is the general dry clothes mode curve
  • the fast drying mode has a long running time in the high frequency section
  • the general dry mode has a long running time in the high frequency section
  • the expansion valve is based on the frequency reduction. The order opening is increased; however, the start mode of the quick mode is too large.
  • the time of each frequency phase is compared with the reference time.
  • the fast frequency reduction indicates that the temperature rises rapidly, and there are many refrigerants that can be evaporated, and the valve opening degree can be increased, and the valve can be adjusted to be smaller;
  • the curve 3 is the corresponding curve of the reference high-frequency running time and the expansion valve opening degree
  • the curve 4 is the corresponding curve of the actual high-frequency running time shorter than the reference high-frequency running time and the expansion valve opening degree.
  • Curve 5 is the corresponding curve of the actual high frequency running time compared with the reference high frequency band running time and the expansion valve opening degree.
  • the actual running time of curve 4 is shorter than the reference time, the expansion valve opening degree is increased, and the actual curve 5 is The running time is longer than the reference time, and the expansion valve opening is reduced.
  • the expansion valve can also be adjusted according to parameters such as current/power, current, power increase, expansion valve opening degree is increased; / current / power is reduced, expansion valve opening is reduced.
  • the current/power at each frequency stage is compared with the reference current/power, the current/power is large, the compressor load is large, the temperature is high, and there are many refrigerants evaporating, which can increase the valve opening degree.
  • curve 6 is the corresponding curve of the reference power/current and expansion valve opening
  • curve 7 is the corresponding curve of the actual power/current ratio of the reference power/current and the expansion valve opening.
  • Curve 8 is the corresponding curve of the actual power/current ratio to the expansion valve opening when the power/current is lower than the reference.
  • the actual power/current of curve 7 is higher than the reference power/current, and the expansion valve opening is increased.
  • the actual power/current of 8 is lower than the reference power/current, and the expansion valve opening is reduced.
  • the opening degree of the expansion valve is directly related to the parameters of the inverter compressor, and the temperature change is caused by the parameter change, the indirect adjustment of the change of the opening degree of the expansion valve is reduced, and the error caused by the multi-step measurement in the indirect adjustment is reduced.
  • the control is more accurate and the drying efficiency is high.
  • the clothes dryer of the invention provides a plurality of clothes drying modes, and the user can select a suitable drying mode according to his own needs, and provides the user with more choices, one machine can be applied to different people, and the dryness is improved.
  • the versatility of the clothes machine while providing a variety of drying mode, enhances the diversification and flexibility of the dryer, and can meet the needs of people with different needs and different time periods, further adapting to people's diversification, high speed and high efficiency.
  • the rhythm of life enhances the humanization of the dryer.
  • the inverter compressors are all raised to the set target frequency, and the drying mode is divided by the set target frequency, that is, the running time of the high frequency segment, and the plurality of drying modes are
  • the compressor is fully loaded to maximize the efficiency of the compressor, the compressor is used to the maximum extent, there is no long-term low-load work efficiency, and there is no long-term high-load operation to damage the compressor, resulting in reduced compressor life.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
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Abstract

一种变频热泵干衣机膨胀阀控制方法，干衣机的变频压缩机包括升频阶段、频率保持阶段和降频阶段，利用变频压缩机运转频率/某一频率的运行时间/功率/电流等参数对电子膨胀阀的开度进行调整，同一干衣模式下，设定某一频率运行时间/功率/电流的基准值，将压缩机的该频率运行时间/功率/电流的实际值与设定的基准值进行比较，若该频率运行时间的实际值小于设定的基准值，或功率/电流的实际值大于设定的基准值，将膨胀阀的开度调大，若该频率运行时间的实际值大于设定的基准值，或功率/电流的实际值小于设定的基准值，将膨胀阀的开度调小。

Description

一种变频热泵干衣机膨胀阀控制方法 技术领域
本发明涉及干衣机领域，尤其是一种变频热泵干衣机膨胀阀控制方法。
背景技术
日常生活中，衣物多采用自然晾晒，然而自然晾晒衣服干衣时间较长，尤其在南方霉雨季节，晾晒多天都很难干透，所以干衣机越来越受到用户的青睐，但是现有干衣机的干衣模式大多比较单一，消费者对干衣机的人性化的操作模式有进一步的需求，主要表现在以下三方面，需求一：干衣机在晚上人们休息时段使用时要求噪音要小。需求二：当用户很着急的时候，需要满足用户对干衣速度的较高要求，需求三：当用户对干衣速度不是很着急的时候，对干衣机的耗电的要求变高，需要满足用户节电的要求。
现有制冷系统在运行中，膨胀阀的调整一般以蒸发器进出口温差作为调整依据。比如检测蒸发器出口温度TS与进口表面的温度Te，与目标过热度TSH＝5K进行比较，SH过热度＝TS-Te-TSH，ΔSH＝SH—SH(前回)。SH过热度为正值，需要将发流量调大，且与前回过热度比较，如果过热度有变小趋势，则调整力度偏小，如果与前回过热度比较，如果过热度有变大趋势，则调大力度越大。如果SH过热度为负值，需要将发流量调小，且与前回过热度比较，如果过热度有变大趋势，则调整力度偏小，如果与前回过热度比较，如果过热度有变小趋势，则调小力度越大。这种控制方式可以确保蒸发器的有效换热面积最大化，保证蒸发器内的制冷剂蒸发充分。但需要在蒸发器两侧设置有温度传感器。增加产品电控板的类型。
鉴于此提出本发明。
发明内容
本发明的目的为克服现有技术的不足，提供一种变频热泵干衣机膨胀阀控制方法，省去温度传感器根据压缩机自身参数调整膨胀阀开度。
为了实现该目的，本发明采用如下技术方案：一种变频热泵干衣机膨胀阀控制方法，干衣机的变频压缩机包括升频阶段、频率保持阶段和降频阶段，利用变频压缩机运转频率/某一频率的运行时间/功率/电流等参数对电子膨胀阀的开度进行调整。
同一干衣模式下，设定某一频率运行时间/功率/电流的基准值，将压缩机的该频率运行时间/功率/电流的实际值与设定的基准值进行比较，若该频率运行时间的实际值小于设定的基准值，或功率/电流的实际值大于设定的基准值，将膨胀阀的开度调大，若该频率运行时间的实际值大于设定的基准值，或功率/电流的实际值小于设定的基准值，将膨胀阀的开度调小。
所述降频阶段，变频压缩机运转频率由设定目标频率逐渐阶段性下降，所述膨胀阀开度对应阶段性调大。
所述干衣机包括不同的干衣模式，不同干衣模式下，若相同频率的目标运行时间/功率/电流大，则膨胀阀的开度大。
所述干衣机至少包括第一干衣模式和第二干衣模式，所述第一干衣模式中压缩机的高频率段运行时间长于第二干衣模式中变频压缩机的高频率段运行时间，所述第一干衣模式中进入降频阶段时膨胀阀开度大于所述第二模式中进入降频阶段时膨胀阀开度。
降频阶段，第一干衣模式中检测温度上升到T11℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k1n调整为k11脉冲开度；第二干衣模式中检测温度上升到T21℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k2n调整为k21脉冲开度；所述T11>T21，k1n>k2n，k11>k21。
干衣机开始运行时，调整膨胀阀关至全闭状态，然后打开至第一开度，启动压缩机，压缩机在升频结束后，膨胀阀打开至第二开度，进入频率保持阶段；优选所述调整膨胀阀关至全闭状态为：首先关闭膨胀阀，然后打开一较小开度后关闭一较大开度，反复几次，保证膨胀阀完全处于关闭状态。
所述干衣机还包括一第三干衣模式，所述第三干衣模式中压缩机的高频率段运行时间短于第二干衣模式中压缩机的高频率段运行时间，所述第三干衣模式中进入降频阶段时膨胀阀开度小于所述第二模式中进入降频阶段时膨胀阀开度。
降频阶段，第三干衣模式中检测温度上升到T31℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k3n调整为k31脉冲开度；第二干衣模式中检测温度上升到T21℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k2n调整为k21脉冲开度；所述T21>T31，k2n>k3n，k21>k31。
降频阶段，第一干衣模式中检测温度上升到T12℃时，变频压缩机运转频率从f1Hz下 降到f2Hz，膨胀阀开度由k11调整为k12脉冲开度，直至检测温度上升至T1m℃，变频压缩机运转频率从f2Hz下降到fmHz，膨胀阀开度由k12调整为k1m脉冲开度，至干衣结束，第二干衣模式中检测温度上升到T22℃时，变频压缩机运转频率从f1Hz下降到f2Hz，膨胀阀开度由k21调整为k22脉冲开度；直至检测温度上升至T2m℃，变频压缩机运转频率从f2Hz下降到fmHz，膨胀阀开度由k22调整为k2m脉冲开度；至干衣结束，所述T12>T22，T1m>T2m，k12>k22，k1m>k2m。
降频阶段，第三干衣模式中检测温度上升到T32℃时，变频压缩机运转频率从f1Hz下降到f2Hz，膨胀阀开度由k31调整为k32脉冲开度；直至检测温度上升至T3m℃，变频压缩机运转频率从f2Hz下降到fmHz，膨胀阀开度由k32调整为k3m脉冲开度，至干衣结束，第二干衣模式中检测温度上升到T22℃时，变频压缩机运转频率从f1Hz下降到f2Hz，膨胀阀开度由k21调整为k22脉冲开度；直至检测温度上升至T2m℃，变频压缩机运转频率从f2Hz下降到fmHz，膨胀阀开度由k22调整为k2m脉冲开度，至干衣结束，所述T22>T32，T2m>T3m，k22>k32，k2m>k3m。
采用本发明所述的技术方案后，带来以下有益效果：
1、本发明所述膨胀阀控制方法不用额外设置温度传感器，利用压缩机自身参数来调节膨胀阀开度，压缩机自身参数可通过压缩机的变频器直接获得，所以可省去温度传感器检测温度部分，能够简化控制部分。
2、本发明所述干衣机提供了多种干衣模式，用户可根据自己的需求选择适合自己的干衣模式，给用户提供了更多的选择，一机可适用于不同的人群，提高了干衣机的通用性，同时提供多种干衣模式，增强了干衣机的多样化和灵活性，同时可以匹配不同需求不同时段的人们的要求，更进一步的适应人们多样化、高速、高效的生活节奏，增强了干衣机的人性化。
3、本发明所述干衣机的多个干衣模式中，变频压缩机都上升至设定目标频率，用设定目标频率即高频率段的运行时间长短划分干衣模式，多个干衣模式中压缩机满负荷工作，使压缩机的效率达到最高，压缩机达到最大程度利用，没有长时间低负荷工作效率低，也没有长时间高负荷工作对压缩机造成损坏导致压缩机使用寿命降低。
4、本发明所述干衣模式中第一干衣模式可解决快速干衣的问题，适用于需要快速干衣的人群，第三干衣模式可解决干衣噪音的问题，适用于不着急干衣速度重视干衣静音的人群，第二干衣模式可使节电和干衣速度达到合适的匹配，适用于不着急干衣速度也不怕干 衣噪音的人群。
下面结合附图对本发明的具体实施方式作进一步详细的描述。
附图说明
图1：本发明中干衣模式控制流程图
图2：本发明中膨胀阀开度与干衣模式的关系图
图3：本发明中膨胀阀开度与某一频率的运行时间的关系图
图4：本发明中膨胀阀开度与功率/电流的关系图
其中：S1、升频阶段，S2、频率保持阶段，S3、降频阶段，1、快速干衣模式曲线，2、一般干衣模式曲线，3、基准的高频率的运行时间与膨胀阀开度的对应曲线，4、实际的高频率的运行时间与膨胀阀开度的对应曲线，5、实际的高频率的运行时间与膨胀阀开度的对应曲线，6、基准的功率/电流与膨胀阀开度的对应曲线，7、实际的功率/电流与膨胀阀开度的对应曲线，8、实际的功率/电流与膨胀阀开度的对应曲线，
具体实施方式
本发明所述一种变频热泵干衣机膨胀阀控制方法，干衣机的变频压缩机包括升频阶段、频率保持阶段和降频阶段，利用变频压缩机运转频率/某一频率的运行时间/功率/电流等参数对电子膨胀阀的开度进行调整。不用额外设置温度传感器，利用压缩机自身参数来调节膨胀阀开度，压缩机自身参数可通过压缩机的变频器直接获得，所以可省去温度传感器检测温度部分，能够简化控制部分。所述某一频率的运行时间为变频压缩机在工作频率范围内以一个频率稳定运行的时间。
具体：同一干衣模式下，设定某一频率运行时间/功率/电流的基准值，将压缩机的该频率运行时间/功率/电流的实际值与设定的基准值进行比较，若该频率运行时间的实际值小于设定的基准值，或功率/电流的实际值大于设定的基准值，将膨胀阀的开度调大，若该频率运行时间的实际值大于设定的基准值，或功率/电流的实际值小于设定的基准值，将膨胀阀的开度调小。这样，只需将设定的该频率运行时间/功率/电流等的基准值写入洗衣机的控制板，将工作中直接获取的该频率的运行时间/功率/电流等参数的实际值与设定的基准值对比就可控制膨胀阀的开度，控制简单。在同一模式下，如果某一频率的运行时间长，反而是温度上升慢，因为最终的温度设置是一样的，应该调小开度。但在不同干衣模式下，如果 某一频率的运行时间长,其最终温度/功率/电流要高，该频率下其基准膨胀阀开度要高。
干衣机的变频压缩机包括升频阶段、频率保持阶段和降频阶段，所述降频阶段，变频压缩机运转频率由设定目标频率逐渐阶段性下降，所述膨胀阀开度对应阶段性调大。
不同干衣模式下，其某一频率的基准运行时间/及功率/电流本身就是不一样的。某一频率的基准运行时间越长的模式，相对其他模式相同频率段膨胀阀的开度越大；某一频率的基准目标功率/电流越大的模式，相对其他模式相同频率段膨胀阀的开度越大。
在同一干衣模式下，如果某一频率段下压缩机系统实际温度上升速度比基准温度上升速度越快(也就是时间越短)，在该模式下基准膨胀阀开度基础上将开度调整的越大；某一频率段下的实际压缩机系统功率/电流比基准功率/电流越大，在该模式基准膨胀阀开度基础上将开度调整的就越大。
如图1所示，所述干衣机至少包括两个干衣模式：第一干衣模式和第二干衣模式，所述第一干衣模式中压缩机的高频率段运行时间长于第二干衣模式中变频压缩机的高频率段运行时间，所述第一干衣模式中进入降频阶段时膨胀阀开度大于所述第二模式中进入降频阶段时膨胀阀开度。所述第一干衣模式的干衣速度比第二干衣模式的干衣速度快，所述第二干衣模式的耗电比第一干衣模式的耗电低，用户可根据自己的实际情况选择干衣模式，控制面板上设有干衣模式的控制按钮，用户通过面板按钮对干衣模式进行选择。
第一干衣模式中风机运行的频率或速度高于或等于第二干衣模式中风机运行的频率或速度。优选第一干衣模式中风机运行的频率或速度高于第二干衣模式中风机运行的频率或速度，空气的循环将筒内的湿热气体带走并带入干热的空气，从而将筒内衣物中的水分带走，风机运行的频率或速度越高，促使空气循环越快，更容易将筒内衣物中的水分带走，干衣速度更快。
变频压缩机包括升频阶段、频率保持阶段、降频阶段：压缩机启动后，压缩机运转频率从低频逐渐上升到最高运转频率即设定目标频率，而不是直接以最高运转频率运转。变频压缩机运转频率上升也可分多个阶段，上升到每个频率阶段后运行0.5～3分钟平稳后再上升至另一频率阶段，上升时速度为1Hz/s～1Hz/60s；(例如28～40Hz/s；40～50Hz/s；50～60Hz/s；)，此处不直接上升到最高速度是为了：防止压缩机内部的油在频率即转速突然上升后，从换热器回到压缩机的油量小于排出的油量，导致润滑不好，增加压缩机内部件的磨损。防止蒸发器开始时制冷剂未完全蒸发，使液态制冷剂进入压缩机，稀释压缩机内部的润滑油，导致润滑不好。升频阶段，要监控压缩机运行电流I，反映冷凝温度的冷凝器表面 温度和反映压缩机内部温度的压缩机排气温度，如果达到要求的限值，则频率进行保持，频率即使没有上升到目标转速，也不再上升。
同时变频压缩机都上升至设定目标频率，即压缩机满负荷工作，使压缩机的效率达到最高，压缩机达到最大程度利用。
当压缩机达到设定目标频率或达到限值要求的最高频率后，进入频率保持阶段，按照设定目标频率或达到限值要求的最高频率进行运转。
具体降频阶段，第一干衣模式中检测温度上升到T11℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k1n调整为k11脉冲开度；第二干衣模式中检测温度上升到T21℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k2n调整为k21脉冲开度；所述T11>T21，k1n>k2n，k11>k21。
降频阶段，第一干衣模式中检测温度上升到T12℃时，变频压缩机运转频率从f1Hz下降到f2Hz，膨胀阀开度由k11调整为k12脉冲开度，直至检测温度上升至T1m℃，变频压缩机运转频率从f2Hz下降到fmHz，膨胀阀开度由k12调整为k1m脉冲开度，至干衣结束，第二干衣模式中检测温度上升到T22℃时，变频压缩机运转频率从f1Hz下降到f2Hz，膨胀阀开度由k21调整为k22脉冲开度；直至检测温度上升至T2m℃，变频压缩机运转频率从f2Hz下降到fmHz，膨胀阀开度由k22调整为k2m脉冲开度；至干衣结束，所述T12>T22，T1m>T2m，k12>k22，k1m>k2m。
所述k1n<k11<k12，k2n<k21<k22，变频压缩机运转频率由设定目标频率逐渐阶段性下降，所述膨胀阀开度对应阶段性调大。
干衣机开始运行时，调整膨胀阀关至全闭状态，然后打开至第一开度，压缩机启动，压缩机在升频结束后，膨胀阀打开至第二开度，进入频率保持阶段，优选干衣机开始运行时，首先关闭膨胀阀，然后打开一较小开度后关闭一较大开度，反复几次，保证膨胀阀完全处于关闭状态。干衣机运行开始时，膨胀阀首先执行全闭动作，如果最大开度500脉冲，则先关500脉冲，然后开5个脉冲，关60脉冲反复5次，可保证膨胀阀处于完全关闭状态。完成后，膨胀阀打开至初始位置100脉冲开度，压缩机启动。压缩机在升频结束后，膨胀阀打开至初始位置200脉冲开度。进入频率保持阶段。
如图1所示，所述干衣机还包括一第三干衣模式，所述第三干衣模式中压缩机的高频率段运行时间短于第二干衣模式中压缩机的高频率段运行时间，所述第三干衣模式中进入 降频阶段时膨胀阀开度小于所述第二模式中进入降频阶段时膨胀阀开度。所述第三干衣模式的干衣速度比第二干衣模式的干衣速度慢，但是所述第三干衣模式的噪音比第二干衣模式的噪音低，用户可根据自己的实际情况选择干衣模式，控制面板上设有干衣模式的控制按钮，用户通过面板按钮对干衣模式进行选择。所述第三干衣模式中风机运行的频率或速度低于第二干衣模式中风机运行的频率或速度。可进一步降低噪音。
降频阶段，第三干衣模式中检测温度上升到T31℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k3n调整为k31脉冲开度；第二干衣模式中检测温度上升到T21℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k2n调整为k21脉冲开度；所述T21>T31，k2n>k3n，k21>k31。
降频阶段，第三干衣模式中检测温度上升到T32℃时，变频压缩机运转频率从f1Hz下降到f2Hz，膨胀阀开度由k31调整为k32脉冲开度；直至检测温度上升至T3m℃，变频压缩机运转频率从f2Hz下降到fmHz，膨胀阀开度由k32调整为k3m脉冲开度，至干衣结束，第二干衣模式中检测温度上升到T22℃时，变频压缩机运转频率从f1Hz下降到f2Hz，膨胀阀开度由k21调整为k22脉冲开度；直至检测温度上升至T2m℃，变频压缩机运转频率从f2Hz下降到fmHz，膨胀阀开度由k22调整为k2m脉冲开度，至干衣结束，所述T22>T32，T2m>T3m，k22>k32，k2m>k3m。
所述k3n<k31<k32，变频压缩机运转频率由设定目标频率逐渐阶段性下降，所述膨胀阀开度对应阶段性调大。
第一干衣模式：膨胀阀的开度比其他模式相同频率段的开度大，流量大，压力降小。压缩机在升频结束后，膨胀阀打开至初始位置210脉冲开度。进入频率保持阶段。
变频压缩机运转频率进入降频阶段，当冷凝器表面上升到42℃时，频率从目标转速60Hz下降到50Hz，同时膨胀阀开度调整为230脉冲开度；当冷凝器表面上升到52℃时，频率从转速50Hz下降到40Hz，膨胀阀开度调整为250脉冲开度；当冷凝器表面上升到57℃时，频率从转速40Hz下降到30Hz，膨胀阀开度调整为270脉冲开度；以30Hz运行到烘干结束。
第二干衣模式：压缩机每个频率段对应的冷凝温度低于第一干衣模式，使压缩机因目标冷凝温度降低尽快进入低频率运行阶段，滚筒内的衣物温度低，蒸发器在变频压缩机相同运转频率段运行蒸发的制冷剂少，膨胀阀的开度比第一模式相同频率段的设置就小，流量小，压力降大。压缩机在升频结束后，膨胀阀打开至初始位置200脉冲开度。进入频率 保持阶段，当冷凝器表面上升到32℃时，频率从目标转速60Hz下降到50Hz，同时膨胀阀开度调整为220脉冲开度；当冷凝器表面上升到42℃时，频率从转速50Hz下降到40Hz，膨胀阀开度调整为240脉冲开度；当冷凝器表面上升到47℃时，频率从转速40Hz下降到30Hz，膨胀阀开度调整为260脉冲开度；以30Hz运行到烘干结束。
第三干衣模式：压缩机每个频率段对应的冷凝温度低于第二干衣模式，使压缩机因目标冷凝温度降低尽快进入低频率运行阶段，滚筒内的衣物温度低，蒸发器在变频压缩机相同运转频率段运行蒸发的制冷剂少，膨胀阀的开度比第二模式相同频率段的设置就小，流量小，压力降大。压缩机在升频结束后，膨胀阀打开至初始位置190脉冲开度。进入频率保持阶段。
当冷凝器表面上升到27℃时，频率从目标转速60Hz下降到50Hz，同时膨胀阀开度调整为210脉冲开度；当冷凝器表面上升到37℃时，频率从转速50Hz下降到40Hz，膨胀阀开度调整为230脉冲开度；当冷凝器表面上升到42℃时，频率从转速40Hz下降到30Hz，膨胀阀开度调整为250脉冲开度；以30Hz运行到烘干结束。
如图2所示，1为快速干衣模式曲线，2为一般干衣模式曲线，可见快速干衣模式高频率段运行时间长，一般干衣模式高频率段运行时间长短，膨胀阀根据降频次序开度增加；但快速模式的开始基准开度偏大。
如图3所示，每个频率阶段的时间与基准时间比较，降频快的说明温度升高快，蒸发的制冷剂多，可以将阀开度调大，相反调小；以高频率段运行时间为例，曲线3为基准的高频段运行时间与膨胀阀开度的对应曲线，曲线4为实际的高频率的运行时间比基准的高频段运行时间短时与膨胀阀开度的对应曲线，曲线5为实际的高频率的运行时间比基准的高频段运行时间长时与膨胀阀开度的对应曲线，曲线4的实际运行时间短于基准时间，膨胀阀开度调大，曲线5的实际运行时间长于基准时间，膨胀阀开度调小。
在每个阶段中，也可以根据电流/功率等参数对膨胀阀进行调节，电流，功率增大，膨胀阀开度调大；/电流/功率减小，膨胀阀开度调小。
如图4所示，每个频率阶段的电流/功率与基准电流/功率比较，电流/功率大，压缩机负荷大，温度高，蒸发的制冷剂多，可以将阀开度调大，相反调小；以高频率段为例，曲线6为基准的功率/电流与膨胀阀开度的对应曲线，曲线7为实际的功率/电流比基准的功率/电流高时与膨胀阀开度的对应曲线，曲线8为实际的功率/电流比基准的功率/电流低时与膨胀阀开度的对应曲线，曲线7的实际的功率/电流比基准的功率/电流高，膨胀阀开度调大，曲线 8的实际的功率/电流比基准的功率/电流低，膨胀阀开度调小。
本发明中将膨胀阀开度与变频压缩机的参数建立直接对应关系，取消了参数变化导致温度变化，在导致膨胀阀开度的变化的间接调节，降低间接调节时多步测量导致的误差，控制更加准确，干衣效率高。
有的用户着急穿某件衣服，需要快速烘干，无需考虑噪音和耗电，速度为最重要的标准，此时可以选择第一干衣模式即快速模式，可快速烘干所需衣物；有的用户晚上洗完衣服后打算第二天穿，所以只要晚上将衣服烘干即可，一晚上的时间很长，但是晚上还要休息，也不想干衣机打扰休息，此时需要静音干衣，无需考虑速度和耗电，静音为最重要的标准，所以选择第三干衣模式即静音模式，可以将噪音降到最低，既可以烘干衣服还能够降低噪音避免打扰休息。如果用户不是特别着急烘干衣物也不是害怕噪音打扰休息，可以选择第二干衣模式，使节电和干衣速度达到合适的匹配。
本发明所述干衣机提供了多种干衣模式，用户可根据自己的需求选择适合自己的干衣模式，给用户提供了更多的选择，一机可适用于不同的人群，提高了干衣机的通用性，同时提供多种干衣模式，增强了干衣机的多样化和灵活性，同时可以匹配不同需求不同时段的人们的要求，更进一步的适应人们多样化、高速、高效的生活节奏，增强了干衣机的人性化。
同时本发明所述干衣机的多个干衣模式中，变频压缩机都上升至设定目标频率，用设定目标频率即高频率段的运行时间长短划分干衣模式，多个干衣模式中压缩机满负荷工作，使压缩机的效率达到最高，压缩机达到最大程度利用，没有长时间低负荷工作效率低，也没有长时间高负荷工作对压缩机造成损坏导致压缩机使用寿命降低。
以上所述仅为本发明的优选实施方式，应当指出，对于本领域的普通技术人员而言，在不脱离本发明原理前提下，还可以做出多种变形和改进，这也应该视为本发明的保护范围。

Claims (9)

  1. 一种变频热泵干衣机膨胀阀控制方法，干衣机的变频压缩机包括升频阶段、频率保持阶段和降频阶段，其特征在于：利用变频压缩机运转频率/某一频率的运行时间/功率/电流等参数对电子膨胀阀的开度进行调整。
  2. 根据权利要求1所述的一种变频热泵干衣机膨胀阀控制方法，其特征在于：同一干衣模式下，设定某一频率运行时间/功率/电流的基准值，将压缩机的该频率运行时间/功率/电流的实际值与设定的基准值进行比较，若该频率运行时间的实际值小于设定的基准值，或功率/电流的实际值大于设定的基准值，将膨胀阀的开度调大，若该频率运行时间的实际值大于设定的基准值，或功率/电流的实际值小于设定的基准值，将膨胀阀的开度调小。
  3. 根据权利要求1或2所述的一种变频热泵干衣机膨胀阀控制方法，其特征在于：所述降频阶段，变频压缩机运转频率由设定目标频率逐渐阶段性下降，所述膨胀阀开度对应阶段性调大。
  4. 根据权利要求1-3任一所述的一种变频热泵干衣机膨胀阀控制方法，其特征在于：所述干衣机包括不同的干衣模式，不同干衣模式下，若相同频率的目标运行时间/功率/电流大，则膨胀阀的开度大。
  5. 根据权利要求4所述的一种变频热泵干衣机膨胀阀控制方法，其特征在于：所述干衣机至少包括第一干衣模式和第二干衣模式，所述第一干衣模式中压缩机的高频率段运行时间长于第二干衣模式中变频压缩机的高频率段运行时间，所述第一干衣模式中进入降频阶段时膨胀阀开度大于所述第二模式中进入降频阶段时膨胀阀开度。
  6. 根据权利要求4或5所述的一种变频热泵干衣机膨胀阀控制方法，其特征在于：降频阶段，第一干衣模式中检测温度上升到T11℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k1n调整为k11脉冲开度；第二干衣模式中检测温度上升到T21℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k2n调整为k21脉冲开度；所述T11>T21，k1n>k2n，k11>k21。
  7. 根据权利要求1-6任一所述的一种变频热泵干衣机膨胀阀控制方法，其特征在于：干衣机开始运行时，调整膨胀阀关至全闭状态，然后打开至第一开度，启动压缩机，压缩机在升频结束后，膨胀阀打开至第二开度，进入频率保持阶段；优选所述调整膨胀阀关至全闭状态为：首先关闭膨胀阀，然后打开一较小开度后关闭一较大开度，反复几次，保证膨胀阀完全处于关闭状态。
  8. 根据权利要求1-7任一所述的一种变频热泵干衣机膨胀阀控制方法，其特征在于：所述干衣机还包括一第三干衣模式，所述第三干衣模式中压缩机的高频率段运行时间短于第二干衣模式中压缩机的高频率段运行时间，所述第三干衣模式中进入降频阶段时膨胀阀开度小于所述第二模式中进入降频阶段时膨胀阀开度。
  9. 根据权利要求8所述的一种变频热泵干衣机膨胀阀控制方法，其特征在于：降频阶段，第三干衣模式中检测温度上升到T31℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k3n调整为k31脉冲开度；第二干衣模式中检测温度上升到T21℃时，变频压缩机运转频率从目标频率fnHz下降到f1Hz，膨胀阀开度由k2n调整为k21脉冲开度；所述T21>T31，k2n>k3n，k21>k31。
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KR102344691B1 (ko) 2021-12-29
US20180274166A1 (en) 2018-09-27
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