CN110160231A - Valve body control method, indoor unit and computer readable storage medium - Google Patents

Valve body control method, indoor unit and computer readable storage medium Download PDF

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Publication number
CN110160231A
CN110160231A CN201910458207.6A CN201910458207A CN110160231A CN 110160231 A CN110160231 A CN 110160231A CN 201910458207 A CN201910458207 A CN 201910458207A CN 110160231 A CN110160231 A CN 110160231A
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CN
China
Prior art keywords
temperature
desirability
difference
temperature difference
indoor unit
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Pending
Application number
CN201910458207.6A
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Chinese (zh)
Inventor
冯明坤
熊美兵
王新利
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Application filed by Midea Group Co Ltd, Guangdong Midea HVAC Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201910458207.6A priority Critical patent/CN110160231A/en
Publication of CN110160231A publication Critical patent/CN110160231A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/20Heat-exchange fluid temperature

Abstract

The invention proposes a kind of valve body control method, indoor unit and computer readable storage mediums, wherein valve body control method includes: the return air temperature and set temperature for obtaining indoor unit;Determine the first temperature gap of return air temperature and set temperature;The second temperature difference of the heat exchanger tube temperature of set temperature and indoor unit is determined according to the first temperature gap;The aperture of the electric expansion valve in indoor unit is controlled according to second temperature difference.According to the technical solution of the present invention, the refrigerant distribution that can accurately control indoor unit, makes indoor-unit cooling-medium distribution more evenly, indoor unit working efficiency is improved, saves electric energy, furthermore, indoor unit provides the air-supply of temperature even variation, gives the more comfortable usage experience of user.

Description

Valve body control method, indoor unit and computer readable storage medium
Technical field
The present invention relates to air-conditioning technical fields, in particular to a kind of valve body control method, a kind of indoor unit and one Kind computer readable storage medium.
Background technique
With the improvement of people's life quality, increasingly paying attention to the adjusting of indoor environment, especially cold or extremely hot Under environment, need that room temperature is adjusted, air-conditioning with energy conservation, control flexibly, the features such as being easily installed obtained it is common Family is widely used, but as the awareness of saving energy of people improves, energy conservation and efficient operation to air-conditioning propose higher Requirement.Currently, common air-conditioning system adjusts the aperture of electric expansion valve by tube temperature, however aforesaid way can not be identified correctly The refrigerant demand of indoor unit, operational efficiency is low, causes unnecessary energy loss.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
In view of this, it is an object of the present invention to provide a kind of valve body control methods.
It is another object of the present invention to correspondences to provide a kind of indoor unit.
It is yet a further object of the present invention to provide a kind of computer readable storage mediums.
In order to realize that at least one above-mentioned purpose, the technical solution of the first aspect of the present invention propose a kind of valve body control Method, comprising: obtain the return air temperature and set temperature of indoor unit;Determine the first temperature difference of return air temperature and set temperature Value;The second temperature difference of the heat exchanger tube temperature of set temperature and indoor unit is determined according to the first temperature gap;According to the second temperature Spend the aperture of the electric expansion valve in difference control indoor unit.
The valve body control method proposed according to the present invention, by obtaining the return air temperature and set temperature of indoor unit, and The first temperature gap of return air temperature and set temperature is determined, so that it is determined that the work requirements of air-conditioning specifically work as return air temperature When larger with the difference of set temperature, keep the heat exchange amount of air-conditioning heat exchanger and room air larger, therefore, it is necessary to compressor offers Biggish coolant quantity, quickly to change room temperature, it is possible to understand that ground, the at this time heat exchange amount of indoor set heat exchanger and room air Demand is larger, and compressor is needed to run with larger frequency.When the difference of return air temperature and set temperature is smaller, explanation will make room Interior temperature reaches set temperature, and the heat exchange amount by air-conditioning heat exchanger and room air is smaller, and therefore, compressor provides a small amount of Refrigerant can meet heat exchange demand, and to change room temperature, compressor can meet user demand with smaller power operation.In root When determining the second temperature difference between set temperature and indoor set heat exchanger tube temperature according to the first temperature gap, if the first temperature difference Be worth it is larger, that is, illustrate needed for air-conditioning heat exchange demand it is stronger, while by determine correspond to heat exchange demand second temperature difference, In favor of the subsequent input according to second temperature difference to the coolant quantity for meeting the specifically used demand of user, specifically, when first When temperature gap is larger, if the second temperature difference being calculated is smaller, illustrate the difference of heat exchanger tube temperature and set temperature It is small, illustrate that the heat exchange amount of heat exchanger has met user demand at this time, need to preferentially meet energy saving requirement, if be calculated second Temperature gap is larger, illustrates that the difference of heat exchanger tube temperature and set temperature is big, and current coolant quantity is also insufficient for freezing Or heating needs, it still needs to supply a greater amount of refrigerants, to sum up, second temperature difference is obtained according to the determination of the first temperature gap, it can The energy conservation or heat exchange that air conditioner is controlled according to specific use environment are realized, to reduce unnecessary energy waste.
Wherein, according to the difference of set temperature and heat exchanger tube temperature, the aperture of electric expansion valve is controlled, to realize to interior Machine coolant quantity is reasonably distributed, to save electric energy.Specifically, when set temperature and heat exchanger tube temperature temperature difference are excessive When, illustrate that the coolant quantity for being assigned to heat exchanger is excessive, by reducing the aperture of electric expansion valve, to reduce refrigerant supply amount, from And the supply of refrigerant is accurately distributed, save electric energy;When set temperature and Tube Sheet of Heat Exchanger temperature difference are too small, illustrate to distribute Coolant quantity to heat exchanger is very few, by increasing electronic expansion valve opening, to increase refrigerant supply amount, to improve heat exchange effect Rate changes room temperature, meets user demand.Understandably, in air-conditioning during continuing working, ring is used according to different Border and use demand, return air temperature and heat exchanger tube temperature are variations, therefore, the difference of return air temperature and set temperature, with And the difference of set temperature and heat exchanger tube temperature is also variation, so that the aperture of electric expansion valve, with set temperature and heat exchange The variation of the difference of device tube temperature and change, on the one hand realize automatic control of the air-conditioning to electric expansion valve, it is user-friendly;Separately On the one hand, the variation of electronic expansion valve opening makes refrigerant distribution change, so that compressor distributes suitable refrigerant always and arrives In indoor unit, and then the heat exchange efficiency of heat exchanger is adjusted, gradually changes the supply air temperature of air-conditioning with the variation of room temperature, The excessive temperature differentials of supply air temperature and room temperature is avoided, to improve the comfort level of user.
In addition, the valve body control method in above-described embodiment provided by the invention can also have technical characteristic below:
In the above-mentioned technical solutions, the of the heat exchanger tube temperature of set temperature and indoor unit is determined according to the first temperature gap Two temperature gaps, specifically include: the desirability for corresponding to indoor unit is determined according to the first temperature gap;Degree is true according to demand Fixed the second the temperature difference range corresponding with second temperature difference.
In the technical scheme, the desirability for corresponding to indoor unit is determined by the first temperature gap, that is, passes through return air The difference or set temperature of temperature and set temperature and the difference of return air temperature, determine the desirability of indoor unit, and different returns Air temperature and set temperature, corresponding different indoor unit desirability can be with when return air temperature and larger set temperature difference Determine that desirability is high desirability;When return air temperature and smaller set temperature difference, it can determine that desirability is low Desirability.Degree determines corresponding second temperature difference range with second temperature difference according to demand, makes in different interiors Machine desirability can correspond to different second temperature difference ranges so that the control of air conditioner electronic expansion valve it is more fine and Accurately.
Specifically, when the first temperature gap is larger, the heat exchange demand of heat exchanger and room air is larger in indoor unit, Compressor needs to supply the more refrigerants of heat exchanger, it can be considered that the desirability of indoor unit is higher, according to indoor unit High desirability determines the second the temperature difference range corresponding thereto, so that air-conditioning is according to the second temperature difference difference and the second temperature difference model It encloses, controls the aperture of electric expansion valve, make compressor to indoor unit for giving the corresponding coolant quantity of indoor unit desirability, with Quickly change room temperature, meets user demand;When the first temperature gap is smaller, heat exchanger and room air in indoor unit The demand that exchanges heat is smaller, and the less refrigerant of compressor supply heat exchanger can meet heat exchange needs, it can be considered that indoor unit Desirability it is lower, according to the low desirability of indoor unit, the second the temperature difference range corresponding thereto is determined, so that air-conditioning root According to the second temperature difference difference and the second the temperature difference range, the aperture of electric expansion valve is controlled, makes compressor to indoor unit for giving interior The corresponding coolant quantity of machine desirability, makes in the case where meeting user demand, small-scale adjusting refrigerant supply amount, optimization refrigerant point Match, to save electric energy.
In the above-mentioned technical solutions, the desirability for corresponding to indoor unit is determined according to the first temperature gap, is specifically included: If the first temperature gap is in the first the temperature difference range, desirability is middle desirability;If the first temperature gap is less than The lower threshold of one the temperature difference range, then desirability is low desirability;If the first temperature gap is greater than the first temperature range Upper limit threshold, then desirability is high desirability.
In the technical scheme, the first different temperature difference differences corresponds to the desirability of different indoor units, determines first The temperature difference range determines indoor unit desirability according to the relativity of the first temperature gap and the first the temperature difference range, when the first temperature When degree difference is in the first temperature range, illustrate that indoor unit desirability is moderate, so that it is determined that desirability is middle demand journey Degree;When lower threshold of first temperature gap less than the first the temperature difference range, illustrate that the first temperature gap is smaller at this time, indoor unit needs Ask degree lower, so that it is determined that desirability is low desirability;When the first temperature gap is greater than the upper limit of the first the temperature difference range Threshold value illustrates that the first temperature gap is larger at this time, and indoor unit desirability is higher, so that it is determined that desirability is high demand journey Degree.By the way that the desirability of indoor unit is set as middle desirability, low desirability and high demand journey according to the first temperature gap Degree, can make air-conditioning under different degrees of indoor unit demand, take electric expansion valve different control modes, respectively with right The coolant quantity for being assigned to indoor unit carries out control appropriate, realizes the high-efficiency operation of air-conditioning.
Wherein, the first different the temperature difference ranges can be set according to the air-conditioning of different regions, Different climate or different model, Specifically, in hotter, colder area or the biggish area of day and night temperature, user is during using air-conditioning, return air temperature Degree and set temperature difference are larger, appropriate biggish first the temperature difference range can be set at this time, so that when return air temperature is close When set temperature, can in biggish first the temperature difference range, determine indoor unit desirability be it is moderate, reduce to electronic expansion The frequent control of valve makes air-conditioning keep more stable power output, reduces the loss of air-conditioning, and save electric energy.
In the above-mentioned technical solutions, the aperture of the electric expansion valve in indoor unit is controlled according to second temperature difference, specifically Include: to be in the second the temperature difference range in the second temperature difference difference, keeps the aperture of electric expansion valve constant;In the second temperature difference difference Less than the second the temperature difference range lower threshold when, control electric expansion valve aperture increase;It is greater than second in the second temperature difference difference When the upper limit threshold of the temperature difference range, the aperture for controlling electric expansion valve reduces.
In the technical scheme, the aperture that electric expansion valve is controlled according to second temperature difference, determines the second the temperature difference range, It when the second temperature difference difference is in the second the temperature difference range, keeps the aperture of electric expansion valve constant, supplies indoor unit at this time Coolant quantity is constant, keeps indoor unit Power operation constant, changes room temperature uniformly, to save in the case where meeting customer need Electric energy;When lower threshold of the second temperature difference less than the second the temperature difference range, the refrigerant in indoor set heat exchanger is thought at this time Measure very few, the aperture by controlling electric expansion valve increases, and to increase the coolant quantity that supply to indoor unit, improves indoor unit and exchanges heat The heat exchange efficiency of device and room air, changes room temperature faster, to meet customer need;When the second temperature difference difference is greater than When the upper limit threshold of the second the temperature difference range, think that the coolant quantity in indoor set heat exchanger is excessive at this time, by controlling electronic expansion The aperture of valve reduces, and to reduce the coolant quantity of indoor unit supply, supplies suitable refrigerant and Interior Space to the heat exchanger of indoor unit Gas heat exchange provides more comfortable air-supply for user, realizes the distribution of precise controlling refrigerant, to reduce the operation frequency of compressor Rate effectively saves electric energy.
In the above-mentioned technical solutions, the upper limit threshold of the second the temperature difference range of high desirability is greater than the of middle desirability The upper limit threshold of two the temperature difference ranges, the upper limit threshold of the second the temperature difference range of middle desirability are greater than the second temperature of low desirability The upper limit threshold of poor range;The lower threshold of second the temperature difference range of high desirability is greater than the second temperature difference model of middle desirability The lower threshold enclosed, the lower threshold of the second the temperature difference range of middle desirability are greater than the second the temperature difference range of low desirability Lower threshold.
In the technical scheme, indoors machine desirability difference when, the second the temperature difference range corresponding with desirability Difference, specifically, if the second the temperature difference range of high desirability be (Ah, Bh), middle the second the temperature difference range of desirability be (Am, Bm), low the second the temperature difference range of desirability be (Al, Bl), then Ah > Am > Al, and Bh > Bm > Bl, wherein Ah, Am, Al, Bh, Bm, Bl are constant.
Understandably, from low desirability to high desirability, the second the temperature difference range of three different demands degree is to be in It is ladder-like incremental, so according to the second temperature difference difference and control of second the temperature difference range to electronic expansion valve opening, Ke Yishi The supply amount of refrigerant is adjusted, step by step now to optimize the distribution of refrigerant.
Specifically, when the high desirability of machine is higher indoors, the temperature difference of return air temperature and set temperature is larger, is quickly full Sufficient user changes the demand of room temperature, and compressor supplies biggish coolant quantity to indoor set heat exchanger, with improve heat exchanger with The heat exchange efficiency of air, simultaneously as coolant quantity is larger in heat exchanger, so that in heat transfer process, set temperature and Tube Sheet of Heat Exchanger The temperature difference of temperature is larger, when the temperature difference for determining temperature and heat exchanger tube temperature is greater than the upper limit threshold of high the second the temperature difference range of desirability When value, control electronic expansion valve opening reduces, to reduce the refrigerant supply amount to indoor unit, so that set temperature and Tube Sheet of Heat Exchanger Temperature difference reduces, when air-conditioning work for a period of time after, when return air temperature and set temperature difference are reduced in the first the temperature difference range, The desirability of indoor unit is middle desirability, if set temperature and Tube Sheet of Heat Exchanger temperature difference are greater than middle second temperature difference of desirability When the upper limit threshold of range, control electric expansion valve reduces again, so that the refrigerant supply amount of indoor unit is further adjusted, it is real The adjusting step by step of existing coolant quantity, improves the distribution accuracy of refrigerant, saves electric energy.
In the above-mentioned technical solutions, when desirability is high desirability, the aperture of electric expansion valve reduces the first width The aperture of degree, electric expansion valve increases the second amplitude;When desirability is middle desirability, the aperture of electric expansion valve subtracts It is identical as the increase amplitude of the aperture of electric expansion valve by a small margin, and reduction amplitude and increase amplitude are the first amplitude;It is needing When to seek degree be low desirability, the second amplitude of reduction of the aperture of electric expansion valve, the increase of the aperture of electric expansion valve the One amplitude, wherein the first amplitude is less than the second amplitude.
In the technical scheme, when indoor unit desirability is middle desirability, the reduction of the aperture of electric expansion valve The increase amplitude of amplitude and the aperture of electric expansion valve is the first amplitude, so that air-conditioning in middle desirability, controls electronics After expansion valve opening variation, the coolant quantity increased or decreased is equal, so that indoor unit acquisition coolant quantity is more stable, to make to send Air temperature even variation improves user's comforts of use.When indoor unit desirability is high desirability, if second temperature difference Difference controls electric expansion valve and opens less than the lower threshold of the second the temperature difference range since user is there is an urgent need to change room temperature Degree increases the second amplitude, more refrigerant can be supplied for indoor unit, the second temperature difference difference increases, and improves the heat exchange of indoor unit The heat exchange efficiency of device and room air, quickly to change room temperature, when the second temperature difference difference is greater than the upper of the second the temperature difference range When limiting threshold value, electronic expansion valve opening reduces the first amplitude, to reduce refrigerant supply amount, so that the second temperature difference difference reduces, by In the first amplitude less than the second amplitude, the supply amount of refrigerant reduction is less than the supply amount that refrigerant increases, so that second temperature difference The amplitude that difference reduces is made at the second temperature difference difference less than the amplitude that the second temperature difference difference increases by one or many adjustings In in the second the temperature difference range, making the heat exchange efficiency of indoor set heat exchanger and room air be in appropriate range, meeting user Under demand, more comfortable air-supply, also, the aperture by repeatedly adjusting electric expansion valve are provided, is realized in high desirability Under supply coolant quantity optimization distribution, save electric energy.When indoor unit desirability is low desirability, room temperature at this time Smaller with set temperature difference, user demand is predominantly appropriate to change room temperature, if the second temperature difference difference is less than second temperature difference The lower threshold of range, control electronic expansion valve opening increase the first amplitude, pass through electric expansion valve increase refrigerant appropriate Supply amount increases the second temperature difference difference, the heat exchanger of indoor unit and the heat exchange efficiency of room air is improved, suitably to change room Interior temperature, when the second temperature difference difference is greater than the upper limit threshold of the second the temperature difference range, electronic expansion valve opening reduces the second amplitude, To reduce refrigerant supply amount, so that the second temperature difference difference reduces, since the first amplitude is less than the second amplitude, the supply of refrigerant reduction Amount is greater than the supply amount that refrigerant increases, so that the amplitude that the second temperature difference difference reduces is greater than the width that the second temperature difference difference increases Degree, by one or many adjustings, is in the second temperature difference difference in the second the temperature difference range, and close under the second the temperature difference range Threshold value is limited, so that lower coolant quantity is supplied in the case where meeting user demand, to save electric energy.
In the above-mentioned technical solutions, before determining the first temperature gap of return air temperature and set temperature, further includes: really Determine the operational mode of indoor unit;Wherein, when operational mode is refrigeration mode, the first temperature gap is return air temperature and setting temperature The difference of degree, when operational mode is heating mode, the first temperature gap is the difference of set temperature and return air temperature.
In the technical scheme, air-conditioning is set with refrigeration mode and heating mode, when operational mode is refrigeration mode, room Interior temperature be greater than user set temperature, i.e., return air temperature be greater than set temperature, therefore, the first temperature gap be return air temperature with The difference of set temperature;When operational mode is heating mode, room temperature is less than set temperature, i.e. return air temperature is less than setting Temperature, therefore the first temperature gap is the difference of set temperature and return air temperature.
In the above-mentioned technical solutions, the second temperature difference of the heat exchanger tube temperature of set temperature and indoor unit is determined, specifically It include: when operational mode is refrigeration mode, second temperature difference is the difference of set temperature and heat exchanger tube temperature;In operation mould When formula is heating mode, second temperature difference is the difference of the mild set temperature of Tube Sheet of Heat Exchanger.
In the technical scheme, when operational mode is refrigeration mode, set temperature is less than heat exchanger tube temperature, therefore second Temperature gap is the difference of set temperature and heat exchanger tube temperature, thus when air-conditioning opens refrigerating function, according to set temperature and The difference of heat exchanger tube temperature controls the aperture of electric expansion valve, to have the function that distribute refrigerant.It is heating mould in operational mode When formula, set temperature is greater than heat exchanger tube temperature, and therefore, second temperature difference is the difference of the mild set temperature of Tube Sheet of Heat Exchanger, from And when air-conditioning opens heat-production functions, according to the difference of the mild set temperature of Tube Sheet of Heat Exchanger, the aperture of electric expansion valve is controlled, with Have the function that distribute refrigerant.
Technical solution provides a kind of indoor unit according to the second aspect of the invention, the technical side for above-mentioned first aspect The valve body control method of any one of case, including memory, processor and storage can be run on a memory and on a processor Computer program, processor execute computer program when realize as any of the above-described valve body control method the step of, so Technical effect with any technical solution of above-mentioned first aspect, details are not described herein.
The third aspect of the present invention technical solution provides a kind of computer readable storage medium, is stored thereon with computer Program, when computer program is executed by processor the step of the valve body control method of realization any of the above-described, so have above-mentioned The technical effect of any technical solution of first aspect, details are not described herein.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention Recognize.
Detailed description of the invention
Fig. 1 shows the flow diagram of valve body control method according to an embodiment of the invention;
Fig. 2 shows the flow diagrams of valve body control method according to an embodiment of the invention;
Fig. 3 shows the flow diagram of valve body control method according to an embodiment of the invention;
Fig. 4 shows the flow diagram of valve body control method according to an embodiment of the invention;
Fig. 5 shows the process signal of middle desirability lower valve body controlling means according to an embodiment of the invention Figure;
Fig. 6 shows the process signal of low desirability lower valve body controlling means according to an embodiment of the invention Figure;
Fig. 7 shows the process signal of high desirability lower valve body controlling means according to an embodiment of the invention Figure;
Fig. 8 shows the flow diagram of valve body control method according to an embodiment of the invention;
Fig. 9 shows the flow diagram of refrigeration mode lower valve body controlling means according to an embodiment of the invention;
Figure 10 shows heating mode lower valve body controlling means schematic diagram according to an embodiment of the invention.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below Specific embodiment limitation.
According to some embodiments of the present invention referring to Fig. 1 to Figure 10 description.
As shown in Figure 1, An embodiment provides a kind of valve body control method, control method includes: step S102 obtains the return air temperature and set temperature of indoor unit;Step S104 determines the first temperature of return air temperature and set temperature Spend difference;Step S106 determines that the second temperature of the heat exchanger tube temperature of set temperature and indoor unit is poor according to the first temperature gap Value;Step S108 controls the aperture of the electric expansion valve in indoor unit according to second temperature difference, specifically includes following below scheme step It is rapid:
Specifically, by obtaining the return air temperature and set temperature of indoor unit, and return air temperature and set temperature are determined The first temperature gap, so that it is determined that the work requirements of air-conditioning, specifically, when the difference of return air temperature and set temperature is larger When, keep the heat exchange amount of air-conditioning heat exchanger and room air larger, therefore, it is necessary to compressors to provide biggish coolant quantity, with quick Change room temperature, it is possible to understand that ground, the heat exchange amount demand of indoor set heat exchanger and room air is larger at this time, needs compressor With the operation of larger frequency.When the difference of return air temperature and set temperature is smaller, explanation will make room temperature reach set temperature, Heat exchange amount by air-conditioning heat exchanger and room air is smaller, and therefore, compressor, which provides a small amount of refrigerant, can meet heat exchange need It asks, to change room temperature, compressor can meet user demand with smaller power operation.It is determined according to the first temperature gap When second temperature difference between set temperature and indoor set heat exchanger tube temperature, if the first temperature gap is larger, that is, needed for illustrating The demand of air-conditioning heat exchange is stronger, while corresponding to the second temperature difference of heat exchange demand by determining, in favor of subsequent according to the Input of two temperature gaps to the coolant quantity for meeting the specifically used demand of user, specifically, when the first temperature gap is larger, if The second temperature difference being calculated is smaller, then illustrates that the difference of heat exchanger tube temperature and set temperature is small, illustrate heat exchanger at this time Heat exchange amount met user demand, need to preferentially meet energy saving requirement, if the second temperature difference being calculated is larger, explanation The difference of heat exchanger tube temperature and set temperature is big, and current coolant quantity is also insufficient for refrigeration or heating needs, still needs to supply To a greater amount of refrigerants, to sum up, is determined according to the first temperature gap and obtain second temperature difference, it can be achieved that using according to specific The energy conservation or heat exchange of environmental Kuznets Curves air conditioner, to reduce unnecessary energy waste.
Wherein, according to the difference of set temperature and heat exchanger tube temperature, the aperture of electric expansion valve is controlled, to realize to interior Machine coolant quantity is reasonably distributed, to save electric energy.Specifically, when set temperature and heat exchanger tube temperature temperature difference are excessive When, illustrate that the coolant quantity for being assigned to heat exchanger is excessive, by reducing the aperture of electric expansion valve, to reduce refrigerant supply amount, from And the supply of refrigerant is accurately distributed, save electric energy;When set temperature and Tube Sheet of Heat Exchanger temperature difference are too small, illustrate to distribute Coolant quantity to heat exchanger is very few, by increasing electronic expansion valve opening, to increase refrigerant supply amount, to improve heat exchange effect Rate changes room temperature, meets user demand.Understandably, in air-conditioning during continuing working, ring is used according to different Border and use demand, return air temperature and heat exchanger tube temperature are variations, therefore, the difference of return air temperature and set temperature, with And the difference of set temperature and heat exchanger tube temperature is also variation, so that the aperture of electric expansion valve, with set temperature and heat exchange The variation of the difference of device tube temperature and change, on the one hand realize automatic control of the air-conditioning to electric expansion valve, it is user-friendly;Separately On the one hand, the variation of electronic expansion valve opening makes refrigerant distribution change, so that compressor distributes suitable refrigerant always and arrives In indoor unit, and then the heat exchange efficiency of heat exchanger is adjusted, gradually changes the supply air temperature of air-conditioning with the variation of room temperature, The excessive temperature differentials of supply air temperature and room temperature is avoided, to improve the comfort level of user.
As shown in Fig. 2, valve body control method according to an embodiment of the invention, specifically includes following below scheme step:
Step S202 obtains the return air temperature and set temperature of indoor unit;
Step S204 determines the first temperature gap of return air temperature and set temperature;
Step S206 determines the desirability for corresponding to indoor unit according to the first temperature gap;
Step S208, degree determines the second the temperature difference range corresponding with second temperature difference according to demand;
Step S210 controls the aperture of the electric expansion valve in indoor unit according to second temperature difference.
Specifically, the desirability for corresponding to indoor unit is determined by the first temperature gap, that is, is passed through return air temperature and set Determine the difference of temperature or the difference of set temperature and return air temperature, determine the desirability of indoor unit, different return air temperatures with Set temperature, corresponding different indoor unit desirability can determine demand when return air temperature and larger set temperature difference Degree is high desirability;When return air temperature and smaller set temperature difference, it can determine that desirability is low desirability. Degree determines corresponding second temperature difference range with second temperature difference according to demand, makes in different indoor unit demand journeys Degree, can correspond to different second temperature difference ranges, so that the control of air conditioner electronic expansion valve is more fine and accurate.
Specifically, when the first temperature gap is larger, the heat exchange demand of heat exchanger and room air is larger in indoor unit,
Compressor needs to supply the more refrigerants of heat exchanger, it can be considered that the desirability of indoor unit is higher, according to The high desirability of indoor unit determines the second the temperature difference range corresponding thereto, so that air-conditioning is according to the second temperature difference difference and the Two the temperature difference ranges control the aperture of electric expansion valve, keep compressor corresponding for giving indoor unit desirability to indoor unit Coolant quantity meets user demand quickly to change room temperature;When the first temperature gap is smaller, in indoor unit heat exchanger with The heat exchange demand of room air is smaller, and the less refrigerant of compressor supply heat exchanger can meet heat exchange needs, therefore can be with Think that the desirability of indoor unit is lower, according to the low desirability of indoor unit, determine the second the temperature difference range corresponding thereto, So that air-conditioning controls the aperture of electric expansion valve, makes compressor to indoor unit according to the second temperature difference difference and the second the temperature difference range For giving the corresponding coolant quantity of indoor unit desirability, make in the case where meeting user demand, small-scale adjusting refrigerant supply amount, Optimize refrigerant distribution, to save electric energy.
As shown in figure 3, valve body control method according to an embodiment of the invention, specifically includes following below scheme step:
Step S302 obtains the return air temperature and set temperature of indoor unit;
Step S304 determines the first temperature gap of return air temperature and set temperature;
Whether step S306, the first temperature gap are in the first the temperature difference range, execute S308 if not, otherwise execute S312;
Step S308, the first temperature difference difference whether less than the first the temperature difference range lower threshold, execute S310 if not, otherwise Execute S314;
Whether step S310, the first temperature difference difference are greater than the upper limit threshold of the first the temperature difference range, execute S312 if not, otherwise Execute S316;
Step S312 determines that desirability is middle desirability;
Step S314 determines that desirability is low desirability;
Step S316 determines that desirability is high desirability;
Step S318, degree determines the second the temperature difference range corresponding with second temperature difference according to demand;
Step S320 controls the aperture of the electric expansion valve in indoor unit according to second temperature difference.
Specifically, the first different temperature difference differences corresponds to the desirability of different indoor units, predefines first temperature difference Range determines indoor unit desirability according to the relativity of the first temperature difference and the first the temperature difference range, when the first temperature gap When in the first temperature range, illustrate that indoor unit desirability is moderate, so that it is determined that desirability is middle desirability;When One temperature gap illustrates that the first temperature gap is smaller at this time, indoor unit desirability less than the lower threshold of the first the temperature difference range It is lower, so that it is determined that desirability is low desirability;When upper limit threshold of first temperature gap greater than the first the temperature difference range, say Bright first temperature gap at this time is larger, and indoor unit desirability is higher, so that it is determined that desirability is high desirability.Passing through will The desirability of indoor unit is set as middle desirability, low desirability and high desirability according to the first temperature gap, can make Air-conditioning takes respectively electric expansion valve different control modes under different degrees of indoor unit demand, to meet indoor unit Demand, realize the high-efficiency operation of air-conditioning.
As shown in figure 4, valve body control method according to an embodiment of the invention, specifically includes following below scheme step:
Step S402 obtains the return air temperature and set temperature of indoor unit;
Step S404 determines the first temperature gap of return air temperature and set temperature;
Whether step S406, the first temperature gap are in the first the temperature difference range, execute S408 if not, otherwise execute S412;
Step S408, the first temperature difference difference whether less than the first the temperature difference range lower threshold, execute S410 if not, otherwise Execute S414;
Whether step S410, the first temperature difference difference are greater than the upper limit threshold of the first the temperature difference range, execute S412 if not, otherwise Execute S416;
Step S412 determines that desirability is middle desirability;
Step S414 determines that desirability is low desirability;
Step S416 determines that desirability is high desirability;
Step S418, degree determines the second the temperature difference range corresponding with second temperature difference according to demand;
Whether step S420, second temperature difference are in the second the temperature difference range, execute S422 if not, otherwise execute S426;
Step S422, the second temperature difference difference whether less than the second the temperature difference range lower threshold, execute S424 if not, otherwise Execute S428;
Whether step S424, the second temperature difference difference are greater than the upper limit threshold of the second the temperature difference range, execute S426 if not, otherwise Execute S430;
Step S426 keeps the aperture of electric expansion valve constant;
Step S428, the aperture for controlling electric expansion valve increase;
Step S430, the aperture for controlling electric expansion valve reduce.
Specifically, the aperture that electric expansion valve is controlled according to second temperature difference, determines the second the temperature difference range, when the second temperature It when difference is in the second the temperature difference range, keeps the aperture of electric expansion valve constant, supplies the coolant quantity of indoor unit not at this time Become, keep indoor unit Power operation constant, change room temperature uniformly, to save electric energy in the case where meeting customer need;When Two temperature gaps less than the second the temperature difference range lower threshold when, think that the coolant quantity in indoor set heat exchanger is very few at this time, lead to The aperture increase for controlling electric expansion valve is crossed, to increase the coolant quantity supplied to indoor unit, raising indoor set heat exchanger and interior The heat exchange efficiency of air, changes room temperature faster, to meet customer need;When the second temperature difference difference is greater than second temperature difference When the upper limit threshold of range, think that the coolant quantity in indoor set heat exchanger is excessive at this time, by the aperture for controlling electric expansion valve Reduce, to reduce the coolant quantity of indoor unit supply, supplies suitable refrigerant to the heat exchanger of indoor unit and room air exchanges heat, be User provides more comfortable air-supply, the distribution of precise controlling refrigerant is realized, to reduce the running frequency of compressor, effectively Save electric energy.
In the above-described embodiments, the upper limit threshold of the second the temperature difference range of high desirability is greater than the second of middle desirability The upper limit threshold of the temperature difference range, the upper limit threshold of the second the temperature difference range of middle desirability are greater than second temperature difference of low desirability The upper limit threshold of range;The lower threshold of second the temperature difference range of high desirability is greater than the second the temperature difference range of middle desirability Lower threshold, the lower threshold of the second the temperature difference range of middle desirability is greater than under the second the temperature difference range of low desirability Limit threshold value.
In this embodiment, indoors machine desirability difference when, the second the temperature difference range corresponding with desirability is not yet Together, specifically, if the second the temperature difference range of high desirability is (Ah, Bh), middle the second the temperature difference range of desirability is (Am, Bm), Low the second the temperature difference range of desirability is (Al, Bl), then Ah > Am > Al, and Bh > Bm > Bl.
Understandably, from low desirability to high desirability, the second the temperature difference range of three different demands degree is to be in It is ladder-like incremental, so according to the second temperature difference difference and control of second the temperature difference range to electronic expansion valve opening, Ke Yishi The supply amount of refrigerant is adjusted, step by step now to optimize the distribution of refrigerant.
Specifically, when the high desirability of machine is higher indoors, the temperature difference of return air temperature and set temperature is larger, is quickly full Sufficient user changes the demand of room temperature, and compressor supplies biggish coolant quantity to indoor set heat exchanger, with improve heat exchanger with The heat exchange efficiency of air, simultaneously as coolant quantity is larger in heat exchanger, so that in heat transfer process, set temperature and Tube Sheet of Heat Exchanger The temperature difference of temperature is larger, when the temperature difference for determining temperature and heat exchanger tube temperature is greater than the upper limit threshold of high the second the temperature difference range of desirability When value, control electronic expansion valve opening reduces, to reduce the refrigerant supply amount to indoor unit, so that set temperature and Tube Sheet of Heat Exchanger Temperature difference reduces, when air-conditioning work for a period of time after, when return air temperature and set temperature difference are reduced in the first the temperature difference range, The desirability of indoor unit is middle desirability, if set temperature and Tube Sheet of Heat Exchanger temperature difference are greater than middle second temperature difference of desirability When the upper limit threshold of range, control electric expansion valve reduces again, so that the refrigerant supply amount of indoor unit is further adjusted, it is real The adjusting step by step of existing coolant quantity, improves the distribution accuracy of refrigerant, saves electric energy.
As shown in figure 5, middle desirability lower valve body controlling means according to an embodiment of the invention, specifically include following Process step: step S502 determines that desirability is middle desirability;
Step S504, degree determines the second the temperature difference range corresponding with second temperature difference according to demand;
Whether step S506, second temperature difference are in the second the temperature difference range, execute S508 if not, otherwise execute S512;
Step S508, the second temperature difference difference whether less than the second the temperature difference range lower threshold, execute S510 if not, otherwise Execute S514;
Whether step S510, the second temperature difference difference are greater than the upper limit threshold of the second the temperature difference range, execute S512 if not, otherwise Execute S516;
Step S512 keeps the aperture of electric expansion valve constant;
Step S514, the aperture for controlling electric expansion valve increase the first amplitude;
Step S516, the aperture for controlling electric expansion valve reduce the first amplitude.
Specifically, when indoor unit desirability is middle desirability, the reduction amplitude and electricity of the aperture of electric expansion valve The increase amplitude of the aperture of sub- expansion valve is the first amplitude, so that air-conditioning, in middle desirability, control electric expansion valve is opened After variation, the coolant quantity increased or decreased is equal, so that indoor unit acquisition coolant quantity is relatively stable, to keep supply air temperature uniform Variation improves user's comforts of use.
As shown in fig. 6, low desirability lower valve body controlling means according to an embodiment of the invention, specifically include following Process step:
Step S602 determines that desirability is low desirability;
Step S604, degree determines the second the temperature difference range corresponding with second temperature difference according to demand;
Whether step S606, second temperature difference are in the second the temperature difference range, execute S608 if not, otherwise execute S612;
Step S608, the second temperature difference difference whether less than the second the temperature difference range lower threshold, execute S610 if not, otherwise Execute S614;
Whether step S610, the second temperature difference difference are greater than the upper limit threshold of the second the temperature difference range, execute S612 if not, otherwise Execute S616;
Step S612 keeps the aperture of electric expansion valve constant;
Step S614, the aperture for controlling electric expansion valve increase the first amplitude;
Step S616, the aperture for controlling electric expansion valve reduce the second amplitude.
Specifically, in low desirability, room temperature and set temperature difference are smaller at this time, and user demand is predominantly suitable When changing room temperature, if the second temperature difference difference controls electronic expansion valve opening and increases less than the lower threshold of the second the temperature difference range Big first amplitude increases the second temperature difference difference, improves indoor unit by the electric expansion valve supply amount appropriate for increasing refrigerant Heat exchanger and room air heat exchange efficiency, suitably to change room temperature, when the second temperature difference difference be greater than the second temperature difference model When the upper limit threshold enclosed, electronic expansion valve opening reduces the second amplitude, to reduce refrigerant supply amount, so that the second temperature difference difference subtracts Small, since the first amplitude is less than the second amplitude, the supply amount of refrigerant reduction is greater than the supply amount that refrigerant increases, so that second The amplitude that temperature difference difference reduces is greater than the amplitude that the second temperature difference difference increases keeps second temperature difference poor by one or many adjustings Value is in the second the temperature difference range, and close to the lower threshold of the second the temperature difference range, thus in the case where meeting user demand, Lower coolant quantity is supplied, to save electric energy.
As shown in fig. 7, high desirability lower valve body controlling means according to an embodiment of the invention, specifically include following Process step:
Step S702 determines that desirability is high desirability;
Step S704, degree determines the second the temperature difference range corresponding with second temperature difference according to demand;
Whether step S706, second temperature difference are in the second the temperature difference range, execute S708 if not, otherwise execute S712;
Step S708, the second temperature difference difference whether less than the second the temperature difference range lower threshold, execute S710 if not, otherwise Execute S714;
Whether step S710, the second temperature difference difference are greater than the upper limit threshold of the second the temperature difference range, execute S712 if not, otherwise Execute S716;
Step S712 keeps the aperture of electric expansion valve constant;
Step S714, the aperture for controlling electric expansion valve increase the second amplitude;
Step S716, the aperture for controlling electric expansion valve reduce the first amplitude.
Specifically, in high desirability, if the second temperature difference difference less than the lower threshold of the second the temperature difference range, due to Family increases the second amplitude there is an urgent need to change room temperature, control electronic expansion valve opening, can supply for indoor unit more Refrigerant, the second temperature difference difference increases, and improves the heat exchanger of indoor unit and the heat exchange efficiency of room air, quickly to change interior Temperature, when the second temperature difference difference is greater than the upper limit threshold of the second the temperature difference range, electronic expansion valve opening reduces the first amplitude, with Refrigerant supply amount is reduced, so that the second temperature difference difference reduces, since the first amplitude is less than the second amplitude, the supply amount of refrigerant reduction Less than the supply amount that refrigerant increases, so that the amplitude that the second temperature difference difference reduces is less than the width that the second temperature difference difference increases Degree, by one or many adjustings, is in the second temperature difference difference in the second the temperature difference range, makes indoor set heat exchanger and Interior Space The heat exchange efficiency of gas is in appropriate range, in the case where meeting user demand, provides more comfortable air-supply, also, by multiple The aperture of electric expansion valve is adjusted, the optimization distribution of the supply coolant quantity under high desirability is realized, saves electric energy.
As shown in figure 8, valve body control method according to an embodiment of the invention, specifically includes following below scheme step:
Step S802 obtains the return air temperature and set temperature of indoor unit;
Step S804 determines the operational mode of indoor unit;
Step S806, determines refrigeration mode;
Step S808, determines heating mode;
Step S810 determines that the first temperature gap is the difference of return air temperature and set temperature;
Step S812 determines that the first temperature gap is the difference of set temperature and return air temperature;
Whether step S814, the first temperature gap are in the first the temperature difference range, execute S818 if not, otherwise execute S820;
Step S816, the first temperature difference difference whether less than the first the temperature difference range lower threshold, execute S818 if not, otherwise Execute S822;
Whether step S818, the first temperature difference difference are greater than the upper limit threshold of the first the temperature difference range, execute S820 if not, otherwise Execute S824;
Step S820 determines that desirability is middle desirability;
Step S822 determines that desirability is low desirability;
Step S824 determines that desirability is high desirability;
Step S826, degree determines the second the temperature difference range corresponding with second temperature difference according to demand;
Whether step S828, second temperature difference are in the second the temperature difference range, execute S830 if not, otherwise execute S834;
Step S830, the second temperature difference difference whether less than the second the temperature difference range lower threshold, execute S832 if not, otherwise Execute S836;
Whether step S832, the second temperature difference difference are greater than the upper limit threshold of the second the temperature difference range, execute S834 if not, otherwise Execute S838;
Step S834 keeps the aperture of electric expansion valve constant;
Step S836, the aperture for controlling electric expansion valve increase;
Step S838, the aperture for controlling electric expansion valve reduce.
Specifically, air-conditioning is set with refrigeration mode and heating mode, and when operational mode is refrigeration mode, room temperature is big In the set temperature of user, i.e. return air temperature is greater than set temperature, and therefore, the first temperature gap is return air temperature and set temperature Difference;When operational mode is heating mode, room temperature is less than set temperature, i.e. return air temperature is less than set temperature, because This first temperature gap is the difference of set temperature and return air temperature.
As shown in figure 9, valve body control method according to an embodiment of the invention, specifically includes following below scheme step:
Step S902 obtains the return air temperature and set temperature of indoor unit;
Step S904, determines refrigeration mode;
Step S906 determines the difference of return air temperature and set temperature;
Whether step S908, the first temperature gap are in the first the temperature difference range, execute S910 if not, otherwise execute S914;
Step S910, the first temperature difference difference whether less than the first the temperature difference range lower threshold, execute S912 if not, otherwise Execute S916;
Whether step S912, the first temperature difference difference are greater than the upper limit threshold of the first the temperature difference range, execute S914 if not, otherwise Execute S918;
Step S914 determines that desirability is middle desirability;
Step S916 determines that desirability is low desirability;
Step S918 determines that desirability is high desirability;
Step S920, degree determines the second the temperature difference range corresponding with second temperature difference according to demand;
Whether step S922, second temperature difference are in the second the temperature difference range, execute S924 if not, otherwise execute S928;
Step S924, the second temperature difference difference whether less than the second the temperature difference range lower threshold, execute S926 if not, otherwise Execute S930;
Whether step S926, the second temperature difference difference are greater than the upper limit threshold of the second the temperature difference range, execute S928 if not, otherwise Execute S932;
Step S928 keeps the aperture of electric expansion valve constant;
Step S930, the aperture for controlling electric expansion valve increase;
Step S932, the aperture for controlling electric expansion valve reduce.
Specifically, when operational mode is refrigeration mode, set temperature is less than heat exchanger tube temperature, therefore second temperature difference For the difference of set temperature and heat exchanger tube temperature, thus when air-conditioning opens refrigerating function, according to set temperature and Tube Sheet of Heat Exchanger The difference of temperature, controls the aperture of electric expansion valve, to have the function that distribute refrigerant.
As shown in Figure 10, valve body control method according to an embodiment of the invention, specifically includes following below scheme step:
Step S1002 obtains the return air temperature and set temperature of indoor unit;
Step S1004, determines heating mode;
Step S1006 determines the difference of set temperature and return air temperature;
Whether step S1008, the first temperature gap are in the first the temperature difference range, execute S1010 if not, otherwise execute S1014;
Step S1010, the first temperature difference difference whether less than the first the temperature difference range lower threshold, execute S1012 if not, it is no Then execute S1016;
Step S1012, whether the first temperature difference difference is greater than the upper limit threshold of the first the temperature difference range, executes S1014 if not, no Then execute S1018;
Step S1014 determines that desirability is middle desirability;
Step S1016 determines that desirability is low desirability;
Step S10110 determines that desirability is high desirability;
Step S1020, degree determines the second the temperature difference range corresponding with second temperature difference according to demand;
Whether the difference of step S1022, the mild set temperature of Tube Sheet of Heat Exchanger are in the second the temperature difference range, execute if not Otherwise S1024 executes S1028;
Step S1024, the difference of the mild set temperature of Tube Sheet of Heat Exchanger whether less than the second the temperature difference range lower threshold, if No execution S1026, otherwise executes S1030;
Whether the difference of step S1026, the mild set temperature of Tube Sheet of Heat Exchanger are greater than the upper limit threshold of the second the temperature difference range, if No execution S1028, otherwise executes S1032;
Step S1028 keeps the aperture of electric expansion valve constant;
Step S1030, the aperture for controlling electric expansion valve increase;
Step S1032, the aperture for controlling electric expansion valve reduce.
Specifically, when operational mode is heating mode, set temperature is greater than heat exchanger tube temperature, and therefore, second temperature is poor Value is the difference of the mild set temperature of Tube Sheet of Heat Exchanger, to mildly be set when air-conditioning opens heat-production functions according to Tube Sheet of Heat Exchanger The difference of temperature controls the aperture of electric expansion valve, to have the function that distribute refrigerant.
A kind of indoor unit is provided according to another embodiment of the invention, and any valve body for above-described embodiment controls Method including memory, processor and stores the computer program that can be run on a memory and on a processor, and processor is held The step of valve body control method such as any of the above-described is realized when row computer program, so the skill with any of the above-described embodiment Art effect, details are not described herein.
Yet another embodiment of the present invention provides a kind of computer readable storage medium, is stored thereon with computer journey Sequence, the step of any of the above-described valve body control method is realized when computer program is executed by processor, so there is any of the above-described reality The technical effect of example is applied, details are not described herein.
It, can be by obtaining return air temperature, setting according to the valve body control method for the specific embodiment that the application proposes Determine temperature, heat exchanger tube temperature, and the heat exchanger tube temperature of the first temperature gap and indoor unit according to return air temperature and set temperature Second temperature difference, the aperture of electric expansion valve is controlled, thus optimize in indoor unit refrigerant distribution, improve air-conditioning Working efficiency saves electric energy.
As shown in Fig. 2, obtaining the return air temperature and set temperature of indoor unit, and determine return air temperature and set temperature First temperature gap, the difference of available return air temperature and user's set temperature, specifically, when return air temperature is greater than setting temperature When spending, air-conditioning opens heating, and when return air temperature is less than set temperature, air-conditioning opens refrigeration.It is determined by the first temperature gap Corresponding to the desirability of indoor unit, that is, pass through the difference or set temperature of return air temperature and set temperature and the difference of return air temperature Value determines the desirability of indoor unit, different return air temperatures and set temperature, corresponding different degrees of indoor unit demand journey Degree, allows air-conditioning that indoor unit desirability to be divided into multiple and different levels, according to demand degree and second temperature difference It determines corresponding second temperature difference range, makes the indoor unit desirability in different levels, the second different temperature can be corresponded to Difference range is spent, so that the control of air conditioner electronic expansion valve is more fine and accurate.
Specifically, as shown in fig. 7, in operation of air conditioner, return air temperature T1, the set temperature Ts of indoor unit are obtained first, When set temperature Ts is less than return air temperature T1, air-conditioning opens refrigeration mode at this time, presets return air temperature and set temperature difference Range (1, a), when the difference of return air temperature and set temperature is in (1, a) between when, determine the demand journey of indoor unit at this time Degree is middle desirability, when the difference of return air temperature and set temperature is more than or equal to a, determines that indoor unit desirability needs to be high Degree is sought, when the difference of return air temperature and set temperature is less than 1, determines that indoor unit desirability is low desirability.In When desirability, determine that electric expansion valve reduces amplitude and increase amplitude is the first amplitude △ Step1;When low desirability, It determines that the aperture of electric expansion valve reduces the second amplitude △ Step2, increases the first amplitude △ Step1;When high desirability, determine The aperture of electric expansion valve reduces the first amplitude △ Step1, increases the second amplitude △ Step2.Then degree according to demand determines The second the temperature difference range corresponding with the difference of set temperature and heat exchanger tube temperature, when high desirability, the second the temperature difference range be (c, B), when middle desirability, the second the temperature difference range is (c- △ c1, b- △ c1), and when low desirability, second temperature range is (c- △ c2, b- △ c2).
When determining high desirability, the difference of set temperature and heat exchanger tube temperature is judged, be (c, b) with the second the temperature difference range Between relationship, when the difference of set temperature and heat exchanger tube temperature be more than or equal to b when, illustrate the coolant quantity for being assigned to the indoor unit Excessively, need to reduce electronic expansion valve opening △ Step1;When the difference of set temperature and heat exchanger tube temperature is when (c, b) is interior, say The bright indoor-unit cooling-medium amount that is assigned to is suitable, which keeps current aperture, when set temperature and heat exchanger When the difference of tube temperature is less than c, illustrates that the coolant quantity for being assigned to the indoor unit is inadequate, need to increase electronic expansion valve opening △ Step2。
In determination when desirability, the difference of set temperature and heat exchanger tube temperature is judged, be (c- △ with the second the temperature difference range C1, b- △ c1) between relationship, when the difference of set temperature and heat exchanger tube temperature be more than or equal to b- △ c1 when, explanation is assigned to The coolant quantity of the indoor unit is excessive, needs to reduce electronic expansion valve opening △ Step1;When the difference of set temperature and heat exchanger tube temperature For value when (c- △ c1, b- △ c1) is interior, it is suitable illustrate to be assigned to the indoor-unit cooling-medium amount, which keeps working as Preceding aperture illustrates to be assigned to the coolant quantity of the indoor unit not when the difference of set temperature and heat exchanger tube temperature is less than c- △ c1 It is enough, need to increase electronic expansion valve opening △ Step1.
When determining low desirability, the difference of set temperature and heat exchanger tube temperature is judged, be (c- △ with the second the temperature difference range C2, b- △ c2) between relationship, when the difference of set temperature and heat exchanger tube temperature be more than or equal to b- △ c2 when, explanation is assigned to The coolant quantity of the indoor unit is excessive, needs to reduce electronic expansion valve opening △ Step2;When the difference of set temperature and heat exchanger tube temperature For value when (c- △ c2, b- △ c2) is interior, it is suitable illustrate to be assigned to the indoor-unit cooling-medium amount, which keeps working as Preceding aperture;When the difference of set temperature and heat exchanger tube temperature is less than c- △ c2, illustrate to be assigned to the coolant quantity of the indoor unit not It is enough, need to increase electronic expansion valve opening △ Step1.
Wherein, a, b, c are constant, b > c, and b > a;△ Step1 < △ Step2, △ b2 > △ b1, △ c2 > △ c1。
As shown in figure 8, return air temperature T1, the set temperature Ts of indoor unit are obtained first in operation of air conditioner, when setting temperature When spending Ts and being greater than return air temperature T1, air-conditioning opens heating mode at this time, preset return air temperature and set temperature difference range (1, A), when the difference of return air temperature and set temperature be in (1, a) between when, determine at this time indoor unit desirability be middle demand Degree determines that indoor unit desirability is high desirability when the difference of return air temperature and set temperature is more than or equal to a, when When the difference of return air temperature and set temperature is less than 1, determine that indoor unit desirability is low desirability.Middle desirability When, determine that electric expansion valve reduces amplitude and increase amplitude is the first amplitude △ Step3;When low desirability, electronics is determined The aperture of expansion valve reduces the second amplitude △ Step4, increases the first amplitude △ Step3;When high desirability, electronic expansion is determined The aperture of valve reduces the first amplitude △ Step3, increases the second amplitude △ Step4.Then degree according to demand determines and sets heat exchange Corresponding second the temperature difference range of the difference of device tube temperature and set temperature, when high desirability, the second the temperature difference range is (n, m), in When desirability, the second the temperature difference range is (n- △ n1, m- △ n1), when low desirability, second temperature range be (n- △ n2, m-△n2)。
When determining high desirability, judgement sets the difference of the mild set temperature of Tube Sheet of Heat Exchanger, with the second the temperature difference range be (n, M) relationship between illustrates to be assigned to the cold of the indoor unit when the difference for setting the mild set temperature of Tube Sheet of Heat Exchanger is more than or equal to m Matchmaker's amount is excessive, needs to reduce electronic expansion valve opening △ Step3;When setting the difference of the mild set temperature of Tube Sheet of Heat Exchanger at (n, m) When interior, it is suitable to illustrate to be assigned to the indoor-unit cooling-medium amount, which keeps current aperture, when setting Tube Sheet of Heat Exchanger When the difference of mild set temperature is less than n, illustrates that the coolant quantity for being assigned to the indoor unit is inadequate, need to increase electric expansion valve and open Spend △ Step4.
In determination when desirability, judgement sets the difference of the mild set temperature of Tube Sheet of Heat Exchanger, is (n- with the second the temperature difference range △ n1, m- △ n1) between relationship illustrate point when the difference for setting the mild set temperature of Tube Sheet of Heat Exchanger is more than or equal to m- △ n1 The coolant quantity for being fitted on the indoor unit is excessive, needs to reduce electronic expansion valve opening △ Step3;Temperature is mildly set when setting Tube Sheet of Heat Exchanger The difference of degree illustrates to be assigned to the indoor-unit cooling-medium amount suitable, the electronic expansion valve of indoor unit when (n- △ n1, m- △ n1) is interior Current aperture is kept, when the difference for setting the mild set temperature of Tube Sheet of Heat Exchanger is less than n- △ n1, illustrates to be assigned to the indoor unit Coolant quantity is inadequate, needs to increase electronic expansion valve opening △ Step3.
When determining low desirability, judgement sets the difference of the mild set temperature of Tube Sheet of Heat Exchanger, is (n- with the second the temperature difference range △ n2, m- △ n2) between relationship illustrate point when the difference for setting the mild set temperature of Tube Sheet of Heat Exchanger is more than or equal to m- △ n2 The coolant quantity for being fitted on the indoor unit is excessive, needs to reduce electronic expansion valve opening △ Step4;Temperature is mildly set when setting Tube Sheet of Heat Exchanger The difference of degree illustrates to be assigned to the indoor-unit cooling-medium amount suitable, the electronic expansion valve of indoor unit when (n- △ n2, m- △ n2) is interior Keep current aperture;When the difference for setting the mild set temperature of Tube Sheet of Heat Exchanger is less than n- △ n2, illustrate to be assigned to the indoor unit Coolant quantity is inadequate, needs to increase electronic expansion valve opening △ Step3.
Wherein, a, m, n are constant, m > n > a;△ Step3 < △ Step4, △ m2 > △ m1, △ n2 > △ n1.
Technical solution of the present invention is specifically illustrated in conjunction with attached drawing above, valve body control method proposed by the present invention can To control the aperture of electric expansion valve according to return air temperature, set temperature, heat exchanger tube temperature, to optimize indoor unit In refrigerant distribution, improve air-conditioning work efficiency, save electric energy, and supply air temperature can be adjusted step by step according to demand, for Family provides more comfortable air-supply.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating Or imply relative importance;Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ", The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, being also possible to can Dismantling connection, or be integrally connected;" connected " can be directly connected, can also be indirectly connected through an intermediary.For this For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In description of the invention, it is to be understood that the instructions such as term " on ", "lower", "left", "right", "front", "rear" Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched It states, rather than the device or unit of indication or suggestion meaning must have specific direction, be constructed and operated in a specific orientation, It is thus impossible to be interpreted as limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with Suitable mode combines.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification, Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of valve body control method is used for indoor unit characterized by comprising
Obtain the return air temperature and set temperature of the indoor unit;
Determine the first temperature gap of the return air temperature and the set temperature;
Determine that the second temperature of the heat exchanger tube temperature of the set temperature and the indoor unit is poor according to first temperature gap Value;
The aperture of the electric expansion valve in the indoor unit is controlled according to the second temperature difference.
2. valve body control method according to claim 1, which is characterized in that described to be determined according to first temperature gap The second temperature difference of the set temperature and the heat exchanger tube temperature of the indoor unit, specifically includes:
The desirability for corresponding to the indoor unit is determined according to first temperature gap;
The second the temperature difference range corresponding with the second temperature difference is determined according to the desirability.
3. valve body control method according to claim 2, which is characterized in that described to be determined according to first temperature gap Corresponding to the desirability of the indoor unit, specifically include:
If first temperature gap is in the first the temperature difference range, the desirability is middle desirability;
If first temperature gap is less than the lower threshold of first the temperature difference range, the desirability is low demand journey Degree;
If first temperature gap is greater than the upper limit threshold of first temperature range, the desirability is high demand journey Degree.
4. valve body control method according to claim 3, which is characterized in that described to be controlled according to the second temperature difference The aperture of electric expansion valve in the indoor unit, specifically includes:
It is in second the temperature difference range in second temperature difference difference, keeps the aperture of the electric expansion valve constant;
When second temperature difference difference is less than the lower threshold of second the temperature difference range, opening for the electric expansion valve is controlled Degree increases;
When second temperature difference difference is greater than the upper limit threshold of second the temperature difference range, opening for the electric expansion valve is controlled Degree reduces.
5. valve body control method according to claim 4, which is characterized in that the second the temperature difference range of the high desirability Upper limit threshold be greater than the middle desirability the second the temperature difference range upper limit threshold, second temperature difference of the middle desirability The upper limit threshold of range is greater than the upper limit threshold of the second the temperature difference range of the low desirability;
The lower threshold of second the temperature difference range of the high desirability is greater than the second the temperature difference range of the middle desirability Lower threshold, the lower threshold of the second the temperature difference range of the middle desirability are greater than the second temperature difference model of the low desirability The lower threshold enclosed.
6. valve body control method according to claim 4, which is characterized in that the desirability be high desirability When, the aperture of the electric expansion valve reduces the first amplitude, and the aperture of the electric expansion valve increases the second amplitude;
When the desirability is middle desirability, the reduction amplitude of the aperture of the electric expansion valve and the electronic expansion The increase amplitude of the aperture of valve is identical, and the reduction amplitude and the increase amplitude are first amplitude;
When the desirability is low desirability, the second amplitude of reduction of the aperture of the electric expansion valve, the electronics The first amplitude of increase of the aperture of expansion valve,
Wherein, first amplitude is less than second amplitude.
7. valve body control method according to any one of claim 1 to 6, which is characterized in that return described in the determination Before air temperature and the first temperature gap of the set temperature, further includes:
Determine the operational mode of the indoor unit;
Wherein, when the operational mode is refrigeration mode, first temperature gap is the return air temperature and the setting The difference of temperature, when the operational mode is heating mode, first temperature gap is the set temperature and described time The difference of air temperature.
8. valve body control method according to claim 7, which is characterized in that the determination set temperature and the room The second temperature difference of the heat exchanger tube temperature of interior machine, specifically includes:
When the operational mode is refrigeration mode, the second temperature difference is the set temperature and the heat exchanger tube temperature Difference;
When the operational mode is heating mode, the second temperature difference is the Tube Sheet of Heat Exchanger mildly set temperature Difference.
9. a kind of indoor unit, including memory, processor and it is stored on the memory and can runs on the processor Computer program, which is characterized in that the processor is realized when executing the computer program as appointed in claim 1 to 8 The step of valve body control method described in one.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program It realizes when being executed by processor such as the step of valve body control method described in any item of the claim 1 to 8.
CN201910458207.6A 2019-05-29 2019-05-29 Valve body control method, indoor unit and computer readable storage medium Pending CN110160231A (en)

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