CN107255342B - A kind of control method of air conditioner indoor unit - Google Patents
A kind of control method of air conditioner indoor unit Download PDFInfo
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- CN107255342B CN107255342B CN201710452048.XA CN201710452048A CN107255342B CN 107255342 B CN107255342 B CN 107255342B CN 201710452048 A CN201710452048 A CN 201710452048A CN 107255342 B CN107255342 B CN 107255342B
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- 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
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Abstract
The invention discloses a kind of control methods of air conditioner indoor unit, which comprises all Current Temperatures based on obtaining the operational mode of indoor unit and the revolving speed of determining each fan obtain the sum of all Current Temperatures, as current total moisture content；The relative size of the revolving speed of each fan is determined according to the operational mode；It is obtained according to the relative size of the revolving speed of the fan and determines weight based on the revolving speed of each fan；It obtains according to the weight and the current total moisture content and determines actual temperature based on the revolving speed of each fan；It is obtained according to the actual temperature and target temperature and determines the temperature difference based on the revolving speed of each fan；PID arithmetic is executed according to the temperature difference, it is determining according to the result of the PID arithmetic and control the revolving speed of each fan.With the application of the invention, the uniformity of room temperature and air-supply comfort when can improve indoor unit operation.
Description
Technical field
The invention belongs to air-conditioning technique fields, are to relate to more specifically specifically, being to be related to the control of air-conditioning
And a kind of control method of air conditioner indoor unit.
Background technique
Split type vertical air conditioner is widely used with it with biggish refrigerated medium heat.Existing major part vertical air conditioner
Air conditioner indoor machine uses a centrifugal fan and an air outlet, and centrifugal fan is located at indoor unit middle and lower part, and air outlet is located at interior
Machine top shows the structure type that fan and air outlet configure up and down.In this structure type, air-flow is through centrifugal fan from room
The air inlet of interior machine lower part or bottom enter, again from the air outlet on top blow out, air-flow flow through distance it is longer, capacity loss is big,
So that the air supply efficiency of complete machine is lower.
To solve the problems, such as that above structure exists, there is a kind of novel vertical air-conditioner indoor unit, which has
At least two air outlets being arranged above and below, each air outlet are correspondingly arranged a fan, in rear shell, correspond to the position of fan
Air inlet is set, air-flow can be shortened and flow through distance from air inlet to air outlet, and then reduce energy loss, improve complete machine
Air supply efficiency.
It, can opening with each fan of independent control for the vertical air-conditioner indoor unit with multiple air outlets and multiple fans
Stop and revolving speed, realizes the air-supply of different air quantity.But in existing this indoor unit each fan revolving speed control be divided into it is limited
Several gears, manually select gear realize fan run with different rotating speeds.This revolving speed control mode subjectivity is strong, revolving speed choosing
Select narrow range, often occur because revolving speed control the improper uniformity for leading to influence room temperature due to air outlet amount is improper and
The problem of air-supply comfort.
Summary of the invention
The object of the present invention is to provide a kind of control method of air conditioner indoor unit, by have at least two air outlets and
Rotation speed of the fan in the indoor unit of at least two fans is controlled, and is improved the uniformity of room temperature when indoor unit is run and is sent
Wind comfort.
For achieving the above object, the present invention, which adopts the following technical solutions, is achieved:
A kind of control method of air conditioner indoor unit, the indoor unit have at least two air outlets arranged above and below, each
The air outlet is correspondingly arranged on a fan, and the control method includes:
It obtains the operational mode of indoor unit and determines all Current Temperatures based on the revolving speed of each fan, obtain
The sum of all Current Temperatures, as current total moisture content；
The relative size of the revolving speed of each fan is determined according to the operational mode；
It is obtained according to the relative size of the revolving speed of the fan and determines weight based on the revolving speed of each fan；
The weight based on each fan is multiplied with the current total moisture content, obtains and determines each wind
Actual temperature based on the revolving speed of fan；
It is obtained according to the actual temperature and target temperature and determines the temperature difference based on the revolving speed of each fan；
PID arithmetic is executed according to the temperature difference, according to the determination of the result of the PID arithmetic and controls each fan
Revolving speed；
The weight meets: weight summation based on all fans is 1, and the big fan of revolving speed has that be greater than revolving speed small
Fan based on the temperature difference.
Method as described above, Current Temperatures based on the revolving speed of each fan of determination be return air temperature,
One in air outlet temperature, inner coil pipe temperature；The return air temperature for the return air that the return air temperature is sucked by fan, described
When Current Temperatures are the return air temperature, the target temperature is target indoor temperature；The air outlet temperature is right for fan
The leaving air temp at air outlet answered, when the Current Temperatures are the air outlet temperature, the target temperature goes out for target
Air temperature；The coil temperature for the indoor heat exchanger that the return air that the inner coil pipe temperature is sucked by fan passes through, described current
When temperature is the inner coil pipe temperature, the target temperature is target coil temperature.
Method as described above determines the relative size of the revolving speed of each fan according to the operational mode, specifically
Include:
If the operational mode is refrigeration mode, the revolving speed of top fan is greater than the revolving speed of lower section fan；
If the operational mode is heating mode, the revolving speed of lower section fan is less than the revolving speed of top fan.
Method as described above, the method also includes:
If the operational mode is refrigeration mode, the air supply direction for controlling the air outlet of the top is upward；
If the operational mode is heating mode, the air supply direction for controlling the air outlet of bottom is downward.
Method as described above, the proportionality coefficient of pid algorithm corresponding to each fan is according to the revolving speed for determining the fan
Based on the temperature difference determine；In the PID arithmetic, there is what is formed by multiple setting temperature difference being sequentially increased multiple to set
Determine the temperature difference range, the proportionality coefficient has different values in the different setting the temperature difference ranges, and meets in the temperature difference
The proportionality coefficient in the big setting the temperature difference range is not less than the ratio in the small setting the temperature difference range of the temperature difference
Coefficient.
Method as described above, multiple setting the temperature difference ranges, which include at least, the first setting the temperature difference range, described
In first setting the temperature difference range, it is right that the proportionality coefficient of pid algorithm corresponding to the big fan of revolving speed is greater than the small fan institute of revolving speed
The proportionality coefficient for the pid algorithm answered.
Method as described above, multiple setting the temperature difference ranges, which include at least, the second setting the temperature difference range, described
In second setting the temperature difference range, the proportionality coefficient and the temperature difference correlation.
Method as described above, multiple setting the temperature difference ranges, which include at least, has third to set the temperature difference range, described
Third is set in the temperature difference range, corresponding to the proportionality coefficient and the small fan of revolving speed of pid algorithm corresponding to the big fan of revolving speed
Pid algorithm proportionality coefficient it is equal.
Method as described above, in the execution PID arithmetic according to the temperature difference, the maximum fan of revolving speed is corresponding
PID arithmetic participates in operation using the variation of the size constant temperature difference and the temperature difference, and the corresponding PID arithmetic of the fan of remaining revolving speed uses
The variation of the reduced temperature difference and the temperature difference participates in operation.
Compared with prior art, the advantages and positive effects of the present invention are: the control method of indoor unit provided by the invention,
For being provided with the indoor unit of a fan at least two air outlets arranged above and below and each air outlet, according to operation
Mode determines the relative size of the revolving speed of each fan, then to actual temperature based on determining rotation speed of the fan according to revolving speed
Relative size makees the distribution of different weights, and finally the temperature difference based on determined by the actual temperature after distribution executes PID arithmetic, according to
The result of PID arithmetic is determining and controls the revolving speed of each fan, on the one hand, may be implemented to be based on multiple rotation speed of the fan operation mould
The automatic control of formula and temperature, so that the air output of different air outlet blowout friction speeds, room temperature when improving indoor unit operation
The uniformity and comfort of degree, on the other hand the pid algorithm based on the temperature difference controls rotation speed of the fan, can be realized to rotation speed of the fan
Continuous control and accurate temperature controlling further improve air-supply comfort.
After a specific embodiment of the invention is read in conjunction with the figure, the other features and advantages of the invention will become more clear
Chu.
Detailed description of the invention
Fig. 1 is the flow chart of control method one embodiment based on air conditioner indoor unit of the present invention.
Fig. 2 is a tool of the proportionality coefficient of pid algorithm and the temperature difference in the control method based on air conditioner indoor unit of the present invention
Body relation schematic diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to drawings and examples,
Invention is further described in detail.
Referring to Figure 1, which show the flow chart of control method one embodiment based on air conditioner indoor unit of the present invention.
Specifically, the indoor unit of the embodiment has at least two air outlets arranged above and below, and each air outlet is correspondingly arranged on one
A fan is for example centrifugal fan or aerofoil fan.As shown in Figure 1, to the control method of the indoor unit of the type, it is specific and
Speech is to be realized to the control method of the revolving speed of each fan using the process included the following steps:
Step 11: it obtains the operational mode of indoor unit and determines all Current Temperatures based on the revolving speed of each fan,
The sum of all Current Temperatures are obtained, as current total moisture content.
The operational mode of indoor unit includes but is not limited to refrigeration mode and heating mode, and operational mode can set for user
Mould-fixed, or the setting mode that indoor unit is automatically determined according to environment.No matter it is still automatic true to set mode for user
Fixed setting mode can easily be obtained by the controller of air-conditioning.
In this embodiment, the revolving speed of each fan is determined by the temperature difference, and the temperature difference is temperature and target temperature
Difference.Therefore, first have to obtain all Current Temperatures based on determining revolving speed, also, each fan is corresponding with one really
Temperature based on its fixed revolving speed.Then, by each fan will all Current Temperatures of foundation sum, will be with value as current
Total moisture content.
In a preferred embodiment, determine temperature based on the revolving speed of each fan be return air temperature, it is air outlet temperature, interior
Any of coil temperature.
Wherein, the return air temperature for the return air that return air temperature is sucked by fan；And when Current Temperatures are return air temperature, mesh
Mark temperature is target indoor temperature.Fan corresponding with each air outlet has certain air draught range, for example, machine indoors
Air inlet identical with number of fans is formed on shell, each fan corresponds to an air inlet, from corresponding air inlet
Suck return air.So, by the inlet air temperature of the corresponding air inlet of detection fan, it can be obtained returning for the return air that fan is sucked
Air temperature.Target indoor temperature is that expectation indoor unit adjusts the interior attainable temperature of institute of rear chamber, which can be
User's set temperature, the temperature value that can be also automatically determined for indoor unit according to setting rule.Likewise, regardless of being which kind of mode is true
It is fixed, it can easily be obtained by the controller of air-conditioning.
Air outlet temperature is the leaving air temp at air outlet corresponding to fan；When Current Temperatures are air outlet temperature,
Target temperature is target leaving air temp.Specifically, each fan corresponds to an air outlet, and the leaving air temp at air outlet is logical
The temperature sensor detection being arranged at air outlet is crossed to obtain.Target leaving air temp is the leaving air temp of desired air outlet, can
It also can be indoor unit according to the regular temperature value that automatically determine of setting to be user's set temperature.Regardless of being determined for which kind of mode,
It can easily be obtained by the controller of air-conditioning.The target leaving air temp of different air outlets may be the same or different,
Preferably identical temperature.
The coil temperature for the indoor heat exchanger that the return air that inner coil pipe temperature is sucked by fan passes through；It is interior in Current Temperatures
When coil temperature, target temperature is target coil temperature.Indoor unit can be correspondingly arranged on a heat exchanger and one for each fan
The structure of a air inlet, then, the coil temperature for the indoor heat exchanger that the return air that fan is sucked passes through is corresponding to fan
Heat exchanger coil temperature.Indoor unit can also be the structure with one big heat exchanger, then, the return air that fan is sucked
The coil temperature of the indoor heat exchanger of process is generally the coil temperature at the heat exchanger position nearest apart from fan air inlet.Mesh
The coil temperature that coil temperature is desired heat exchanger is marked, can be user's set temperature, can also be advised for indoor unit according to setting
The temperature value then automatically determined.Which kind of, regardless of being determined for mode, can easily be obtained by the controller of air-conditioning.Also,
Target coil temperature corresponding to different fans may be the same or different, preferably identical temperature.
Step 12: the relative size of the revolving speed of each fan is determined according to operational mode.
Under same operational mode, the revolving speed of each fan requires have relative size relationship；Under different operational modes, each
The revolving speed of fan relative size relationship can there is differences.Operational mode and the relative size relationship of each rotation speed of the fan are to deposit
The known relation of storage can easily be got by the controller of air-conditioning.In control process, after getting operational mode, lead to
It crosses and transfers the relationship, that is, can determine in this operating mode, the relative size of each rotation speed of the fan.
Step 13: weight based on the revolving speed for determining each fan is obtained according to the relative size of the revolving speed of fan；Root
It is obtained according to weight and current total moisture content and determines actual temperature based on the revolving speed of each fan；According to actual temperature and target temperature
Degree obtains the temperature difference based on the revolving speed for determining each fan.
After the relative size that step 12 determines the revolving speed of each fan, is obtained and determined according to the relative size of revolving speed
Weight based on each rotation speed of the fan.For example,
After weight based on each fan has been determined, weight based on each fan is worked as with what step 11 obtained
Preceding total moisture content is multiplied, and obtains actual temperature based on the revolving speed for determining each fan, the actual temperature is as calculating temperature difference institute
Temperature.
Then, it is obtained according to actual temperature and target temperature and determines the temperature difference based on the revolving speed of each fan.
Also, weight meets: weight summation based on all fans is 1, and the big fan of revolving speed has and is greater than revolving speed
The temperature difference based on small fan.For example, for having the indoor unit there are two fan, under refrigeration mode, the big wind of revolving speed
Weight based on fan is 0.6, and weight based on the small fan of revolving speed is 0.4.Due to the big fan of revolving speed be corresponding with it is big
Weight, then, correspondingly, having big actual temperature.And in cooling mode, target temperature is less than actual temperature, then, root
The temperature difference obtained according to big actual temperature and target temperature is also big.That is, the big fan of revolving speed corresponds to the big temperature difference, revolving speed is small
Fan correspond to the small temperature difference.Under heating mode, weight based on the big fan of revolving speed is 0.4, the small fan institute of revolving speed
The weight of foundation is 0.6.Since the big fan of revolving speed is corresponding with small weight, then, correspondingly, having small actual temperature.
And in a heating mode, target temperature is greater than actual temperature, then, the temperature difference obtained according to small actual temperature and target temperature
Also big.That is, the big fan of revolving speed corresponds to the big temperature difference, the small fan of revolving speed corresponds to the small temperature difference.
Step 14: PID arithmetic is executed according to the temperature difference, it is determining according to the result of PID arithmetic and control the revolving speed of each fan.
The revolving speed of multiple fans of indoor unit is controlled using the method that above-mentioned steps are constituted, on the one hand, may be implemented to more
Automatic control of a rotation speed of the fan based on operational mode and temperature, so that the air output of different air outlet blowout friction speeds, benefit
The different air outputs having with different height position, the uniformity and comfort of room temperature when can be improved indoor unit operation；
On the other hand, the pid algorithm based on the temperature difference controls rotation speed of the fan, can be realized continuous control and accurate control to rotation speed of the fan
Temperature further improves air-supply comfort.
In a preferred embodiment, indoor unit tool is there are two the air outlet that arranges above and below, respectively upper air outlet and it is lower go out
Air port；Each air outlet is correspondingly arranged on a fan, forms top fan and lower section fan.It is determined according to operational mode each
The relative size of the revolving speed of fan, specifically includes: if operational mode is refrigeration mode, the revolving speed of top fan is greater than lower section fan
Revolving speed；If operational mode is heating mode, the revolving speed of lower section fan is less than the revolving speed of top fan.Moreover, if operational mode
For refrigeration mode, the air supply direction for controlling the air outlet of the top is upward；If operational mode is heating mode, bottom is controlled
The air supply direction of air outlet is downward.So, if operational mode is refrigeration mode, top fan as the maximum fan of revolving speed,
It is for example 0.6 with big weight,；Lower section fan is less than the fan of top fan as revolving speed, has small weight, for example
It is 0.4.Since the weight of lower section fan is small, the temperature difference of acquisition is also small, and the rotation speed of the fan obtained after PID arithmetic also becomes smaller；On the contrary
, the weight of top fan is big, and the temperature difference of acquisition is also big, and the rotation speed of the fan obtained after PID arithmetic is also big.To top fan
Revolving speed is higher than lower section rotation speed of the fan, and upper air outlet amount is big, and since cold air can sink, upper air outlet amount is big, favorably
In the uniformity of room temperature regulation in larger scope.Also, upper air outlet general position is higher, not will cause a large amount of cold airs
Directly blow to human body.It is upward that air outlet air supply direction is further controlled again, can be further improved air-supply uniformity and is avoided
Cold air blow-through improves air-supply comfort to human body.
Same mechanism, if operational mode is heating mode, lower section fan has small as the maximum fan of revolving speed
Weight is for example 0.4；Top fan is less than the fan of lower section fan as revolving speed, has big weight, is for example 0.6.Due to
The weight of lower section fan is small, and the temperature difference obtained in a heating mode is also big, and the rotation speed of the fan obtained after PID arithmetic also becomes larger；Phase
Anti-, the weight of top fan is big, and the temperature difference obtained in a heating mode is small, and the rotation speed of the fan obtained after PID arithmetic is also small.From
And lower section rotation speed of the fan is higher than top rotation speed of the fan, lower air outlet amount is big, and since hot-air can rise, lower air outlet goes out
Air quantity is big, is conducive to the uniformity of room temperature regulation in larger scope.Also, lower air outlet air supply direction is further controlled again
Downwards, it can be further improved air-supply uniformity.
When executing PID arithmetic based on the temperature difference, the variation of coefficient and the used temperature difference and the temperature difference in pid algorithm, to obtaining
The revolving speed result obtained is affected, and then will affect the uniformity and comfort of air-supply.It will be detailed below based on the temperature difference
The preferred process method of pid algorithm.
When determining rotation speed of the fan based on temperature difference execution PID arithmetic, the value of the proportionality coefficient in pid algorithm is to result shadow
Sound is larger.Accordingly, in a preferred embodiment, the proportionality coefficient of pid algorithm corresponding to each fan is according to the determining fan
The temperature difference based on revolving speed determines.In PID arithmetic, there is multiple setting temperature difference being sequentially increased to be formed by multiple set
Determine the temperature difference range.Proportionality coefficient has different values in different setting the temperature difference ranges, and meets the setting big in the temperature difference
Proportionality coefficient in the temperature difference range is not less than the proportionality coefficient in the small setting the temperature difference range of the temperature difference.For example, referring to fig. 2
The proportionality coefficient of pid algorithm and a physical relationship of the temperature difference show in the control method based on air conditioner indoor unit of the present invention shown
It is intended to, the abscissa in figure is temperature difference Pn, and ordinate is Proportional coefficient K p.In the Fig. 2, including there are two the PID of fan calculations
The graph of relation of the Proportional coefficient K p and temperature difference Pn of method, wherein 1., 3., 5. curve constitutes the relatively small fan institute of revolving speed
2., 4., 5. the relation curve of proportionality coefficient and the temperature difference in corresponding pid algorithm, curve constitute the relatively large fan of revolving speed
The relation curve of proportionality coefficient and the temperature difference in corresponding pid algorithm.As shown in Fig. 2, what is be sequentially increased sets the temperature difference as 3
It is a, respectively 0 DEG C, 2 DEG C and 5 DEG C.3 setting temperature difference form 3 setting the temperature difference ranges, respectively [0 DEG C, 2 DEG C], (2 DEG C, 5
DEG C], (5 DEG C ,+∞).Proportionality coefficient in pid algorithm corresponding to the relatively small fan of revolving speed and can in the relation curve of the temperature difference
To be apparent find out, the proportionality coefficient in the smallest setting the temperature difference range of the temperature difference [0 DEG C, 2 DEG C] is placed in the middle less than the temperature difference to be set
Determine the temperature difference range (2 DEG C, 5 DEG C] in proportionality coefficient, and setting the temperature difference range that the temperature difference is placed in the middle (2 DEG C, 5 DEG C] in proportionality coefficient
Proportionality coefficient in setting the temperature difference range (5 DEG C ,+∞) maximum less than the temperature difference.Likewise, corresponding to the relatively large fan of revolving speed
Pid algorithm in proportionality coefficient and the relation curve of the temperature difference also meet the proportionality coefficient in the big setting the temperature difference range of the temperature difference
Not less than the proportionality coefficient in the small setting the temperature difference range of the temperature difference.It the purpose that handles in this way and has technical effect that, if warm
It is poor big, using biggish Proportional coefficient K p, accelerates the circulation of air to obtain biggish rotation speed of the fan, reached with faster speed
To the comfort of room temperature.And in the lesser situation of the temperature difference, rotation speed of the fan is carried out using relatively small Proportional coefficient K p
Control, reaches the comfort conditioning of room temperature on the basis of energy-efficient.
Also, in other preferred embodiments, for the ratio system of multiple pid algorithms corresponding to multiple fans
Number is also made as defined below:
Multiple setting the temperature difference ranges, which include at least, the first setting the temperature difference range, in the first setting the temperature difference range, revolving speed
The proportionality coefficient of pid algorithm corresponding to big fan is greater than the proportionality coefficient of pid algorithm corresponding to the small fan of revolving speed.Tool
Body into Fig. 2, first set the temperature difference range as [0 DEG C, 2 DEG C] and (2 DEG C, 5 DEG C], this first setting the temperature difference range in, revolving speed
The proportionality coefficient of pid algorithm corresponding to big fan be curve 2. and 4. in proportionality coefficient, corresponding to the small fan of revolving speed
Pid algorithm proportionality coefficient be curve 1. and 3. in proportionality coefficient, and curve 2. and 4. in proportionality coefficient be greater than curve
3. the proportionality coefficient in 1..It is corresponding that the proportionality coefficient of the corresponding pid algorithm of the big fan of revolving speed is greater than the small fan of revolving speed
The proportionality coefficient of pid algorithm, so that the pid algorithm of large scale coefficient rotation speed of the fan obtained is even larger than small scale coefficient
Pid algorithm rotation speed of the fan obtained further ensures that the revolving speed of multiple fans can satisfy to rotation speed of the fan relative size
It is required that.
Multiple setting the temperature difference ranges have also included at least the second setting the temperature difference range, in the second setting the temperature difference range, than
Example coefficient and temperature difference correlation.Specific in Fig. 2, second set the temperature difference range as (2 DEG C, 5 DEG C], in second setting
In the temperature difference range, pid algorithm corresponding to the proportionality coefficient and the small fan of revolving speed of pid algorithm corresponding to the big fan of revolving speed
Proportionality coefficient with temperature difference correlation, specifically linear positive correlation.This is because this second
Set in the temperature difference range, although the temperature difference be not it is maximum, it is opposite bigger, rotation speed of the fan on the variation of temperature difference influence compared with
Greatly, once revolving speed adjustment is lagged or error, more uncomfortable influence will be caused on the temperature difference, therefore, proportionality coefficient follows temperature
Poor real-time change, to reduce because rotation speed of the fan is more uncomfortable influence caused by the temperature difference.
Multiple setting the temperature difference ranges have also included at least third setting the temperature difference range, in third setting the temperature difference range, turn
The proportionality coefficient phase of pid algorithm corresponding to the proportionality coefficient of pid algorithm corresponding to the big fan of the speed fan small with revolving speed
Deng.Specific in Fig. 2, third sets the temperature difference range as (5 DEG C ,+∞).In third setting the temperature difference range, the temperature difference is larger, turns
The proportionality coefficient of pid algorithm corresponding to the proportionality coefficient of pid algorithm corresponding to the big fan of the speed fan small with revolving speed is equal
Using equal maximum ratio coefficient value, bigger rotation speed of the fan is obtained as much as possible to accelerate the circulation of air, with faster
Speed reaches the comfort and uniformity of room temperature.
In some other preferred embodiment, in addition to the proportionality coefficient in pid algorithm make above-mentioned preferred process mode it
It outside, can also include that further preferably processing is made in the variation to the temperature difference and the temperature difference employed in pid algorithm.Specifically,
In pid algorithm, the corresponding PID arithmetic of the maximum fan of revolving speed participates in operation using the variation of the size constant temperature difference and the temperature difference,
The corresponding PID arithmetic of the fan of remaining revolving speed participates in operation using the variation of the reduced temperature difference and the temperature difference.
Still by taking the indoor unit with upper and lower two air outlets and upper and lower two fans as an example, under refrigeration mode, top wind
The revolving speed of fan is greater than the revolving speed of lower section fan, that is, top fan is the big fan of revolving speed, lower section fan is the small wind of revolving speed
Fan.Definition: the current temperature difference corresponding to the fan of top is Pn1, and the last temperature difference is Pn1_1, and the temperature difference of last time is Pn1_
2, variation Dn1=(the Pn1- Pn1_1) of the current temperature difference, variation Dn1_1=(the Pn1_1- Pn1_2) of the last temperature difference；Lower section
The current temperature difference corresponding to fan is Pn2, and the last temperature difference is Pn2_1, and the temperature difference of last time is Pn2_2, the current temperature difference
Change Dn2=(Pn2- Pn2_1), variation Dn2_1=(the Pn2_1- Pn2_2) of the last temperature difference.
When executing PID arithmetic based on the temperature difference, the calculating of the proportional Py1, integral term Iy1 and differential term Dy1 of top fan
Formula is respectively as follows:
Py1=Int(Kp1*Dn1)；Int indicates to be rounded, and Kp1 is the proportionality coefficient in the corresponding pid algorithm of top fan；
Iy1=Int(Ki1*Pn1+Iyd1), Iyd1=Iyd1_1+((Ki1*Pn1)-Int(Ki1*Pn1))/10；Ki1 is
Integral coefficient in the corresponding pid algorithm of top fan can be fixed value, and Iyd1 is the fractional part of integral term, and Iyd1_1 is
The fractional part of integral term when last PID arithmetic；
Dy1=Int(Kd1*(Dn1-Dn1_1))；Kd1 is the differential coefficient in the corresponding pid algorithm of top fan, can be
Fixed value.
When executing PID arithmetic based on the temperature difference, the calculating of the proportional Py2, integral term Iy2 and differential term Dy2 of lower section fan
Formula is respectively as follows:
Py2=Int(Kp2*Dn2/2)；Int indicates to be rounded, and Kp2 is the ratio system in the corresponding pid algorithm of lower section fan
Number；
Iy2=Int(Ki2*Pn2/2+Iyd2), Iyd2=Iyd2_1+((Ki2*Pn2/2)-Int(Ki2*Pn2/2))/10；
Ki2 is the integral coefficient in the corresponding pid algorithm of lower section fan, can be fixed value, and Iyd2 is the fractional part of integral term,
The fractional part of integral term when Iyd2_1 is last PID arithmetic；
Dy2=Int(Kd2*(Dn2-Dn2_1)/2)；Kd2 is the differential coefficient in the corresponding pid algorithm of lower section fan, can
For fixed value.
From above-mentioned each formula it is found that in pid algorithm, used by the corresponding PID arithmetic of the maximum top fan of revolving speed
The variation of the temperature difference and the temperature difference is practical calculated value, and the temperature difference and temperature used by the small corresponding PID arithmetic of lower section fan of revolving speed
The variation of difference is less than practical calculated value, has chosen the 1/2 of practical calculated value.To so that top fan wind obtained
It fans revolving speed and is even larger than lower section fan rotation speed of the fan obtained, further ensure that the revolving speed of multiple fans can satisfy and fan is turned
The requirement of fast relative size.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although referring to aforementioned reality
Applying example, invention is explained in detail, for those of ordinary skill in the art, still can be to aforementioned implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these are modified or replace
It changes, the spirit and scope for claimed technical solution of the invention that it does not separate the essence of the corresponding technical solution.
Claims (8)
1. a kind of control method of air conditioner indoor unit, the indoor unit has at least two air outlets arranged above and below, Mei Gesuo
It states air outlet and is correspondingly arranged on a fan, which is characterized in that the control method includes:
It obtains the operational mode of indoor unit and determines all Current Temperatures based on the revolving speed of each fan, obtain all
The sum of Current Temperatures, as current total moisture content；
The relative size of the revolving speed of each fan is determined according to the operational mode；
It is obtained according to the relative size of the revolving speed of the fan and determines weight based on the revolving speed of each fan；
The weight based on each fan is multiplied with the current total moisture content, obtains and determines each fan
Actual temperature based on revolving speed；
It is obtained according to the actual temperature and target temperature and determines the temperature difference based on the revolving speed of each fan；
PID arithmetic is executed according to the temperature difference, turn that be determining according to the result of the PID arithmetic and controlling each fan
Speed；
The weight meets: weight summation based on all fans is 1, and the big fan of revolving speed has and is greater than the small wind of revolving speed
The temperature difference based on fan；
Current Temperatures based on the revolving speed of each fan of determination are return air temperature, air outlet temperature, inner disc tube temperature
One in degree；The return air temperature for the return air that the return air temperature is sucked by fan is the return air in the Current Temperatures
When temperature, the target temperature is target indoor temperature；The air outlet temperature is the outlet air at air outlet corresponding to fan
Temperature, when the Current Temperatures are the air outlet temperature, the target temperature is target leaving air temp；The inner disc tube temperature
The coil temperature for the indoor heat exchanger that the return air that degree is sucked by fan passes through is the inner coil pipe temperature in the Current Temperatures
When, the target temperature is target coil temperature.
2. the method according to claim 1, wherein determining turning for each fan according to the operational mode
The relative size of speed, specifically includes:
If the operational mode is refrigeration mode, the revolving speed of top fan is greater than the revolving speed of lower section fan；
If the operational mode is heating mode, the revolving speed of lower section fan is less than the revolving speed of top fan.
3. according to the method described in claim 2, it is characterized in that, the method also includes:
If the operational mode is refrigeration mode, the air supply direction for controlling the air outlet of the top is upward；
If the operational mode is heating mode, the air supply direction for controlling the air outlet of bottom is downward.
4. according to the method in any one of claims 1 to 3, which is characterized in that pid algorithm corresponding to each fan
Proportionality coefficient is determined according to the temperature difference based on the revolving speed for determining the fan；In the PID arithmetic, there is by it is multiple according to
Multiple setting the temperature difference ranges that the setting temperature difference of secondary increase is formed, the proportionality coefficient is in the different setting the temperature difference ranges
With different values, and it is small not less than in the temperature difference to meet the proportionality coefficient in the big setting the temperature difference range of the temperature difference
Setting the temperature difference range in the proportionality coefficient.
5. according to the method described in claim 4, thering is first to set it is characterized in that, multiple setting the temperature difference ranges include at least
Determine the temperature difference range, in the first setting the temperature difference range, the proportionality coefficient of pid algorithm corresponding to the big fan of revolving speed is greater than
The proportionality coefficient of pid algorithm corresponding to the small fan of revolving speed.
6. according to the method described in claim 4, thering is second to set it is characterized in that, multiple setting the temperature difference ranges include at least
Determine the temperature difference range, in the second setting the temperature difference range, the proportionality coefficient and the temperature difference correlation.
7. according to the method described in claim 4, thering is third to set it is characterized in that, multiple setting the temperature difference ranges include at least
Determine the temperature difference range, the third setting the temperature difference range in, the proportionality coefficient of pid algorithm corresponding to the big fan of revolving speed with turn
The proportionality coefficient of pid algorithm corresponding to the small fan of speed is equal.
8. according to the method in any one of claims 1 to 3, which is characterized in that execute PID according to the temperature difference described
When operation, the corresponding PID arithmetic of the maximum fan of revolving speed participates in operation using the variation of the size constant temperature difference and the temperature difference, remaining
The corresponding PID arithmetic of the fan of revolving speed participates in operation using the variation of the reduced temperature difference and the temperature difference.
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| CN110864365B (en) * | 2018-08-17 | 2021-05-25 | 青岛海尔空调器有限总公司 | Air conditioner control method and air conditioner indoor unit |
| CN109654674B (en) * | 2018-12-11 | 2019-12-31 | 珠海格力电器股份有限公司 | Air conditioning system fan control method, air conditioning system and computer readable storage medium |
| CN109899938A (en) * | 2019-03-13 | 2019-06-18 | 珠海格力电器股份有限公司 | Control method for air outlet temperature of indoor unit of multi-split air conditioner and multi-split air conditioner |
| CN112628958B (en) * | 2019-10-09 | 2021-12-21 | 青岛海尔空调器有限总公司 | Air conditioner control method and air conditioner |
| CN110762730B (en) * | 2019-10-16 | 2020-08-28 | 宁波奥克斯电气股份有限公司 | Natural wind simulation method and device and air conditioner |
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