CN110470027B - Direct current fan adjusting method, controller and temperature adjusting system - Google Patents

Direct current fan adjusting method, controller and temperature adjusting system Download PDF

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Publication number
CN110470027B
CN110470027B CN201910889140.1A CN201910889140A CN110470027B CN 110470027 B CN110470027 B CN 110470027B CN 201910889140 A CN201910889140 A CN 201910889140A CN 110470027 B CN110470027 B CN 110470027B
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wind speed
temperature difference
difference correction
correction parameter
period
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CN110470027A (en
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涂小平
刘启武
王映娟
操四胜
张明勇
石明杰
赵勇
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Sichuan Hongmei Intelligent Technology Co Ltd
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Sichuan Hongmei Intelligent Technology Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans

Abstract

The invention provides a direct current fan adjusting method, a controller and a temperature adjusting system, wherein the direct current fan adjusting method comprises the following steps: acquiring the outdoor environment temperature and the liquid pipe temperature according to the current regulation period; calculating a temperature difference correction parameter of the current regulation period according to the outdoor environment temperature and the liquid pipe temperature; calculating the wind speed variation according to the temperature difference correction parameter of the current regulation period and the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period; and adjusting the wind speed of the direct current fan according to the wind speed variation. The scheme provided by the invention realizes the adjustment of the wind speed of the direct current fan according to the ambient temperature and the temperature of the air-conditioning coil.

Description

Direct current fan adjusting method, controller and temperature adjusting system
Technical Field
The invention relates to the technical field of variable frequency control, in particular to a direct current fan adjusting method, a controller and a temperature adjusting system.
Background
The existing temperature regulating systems such as an air source heat pump, a household air conditioner, a central air conditioner, a ground source heat pump and the like are provided with an alternating current fan or a direct current fan. Compared with an alternating current fan, the direct current fan has the advantages of stepless speed regulation, low noise and the like, so that a temperature regulation system adopting the direct current fan becomes a development trend. And the outdoor unit of the temperature regulating system, such as an air conditioner outdoor unit and the like, can be in the most energy-saving and optimal state by the proper wind speed of the direct current fan. Therefore, the problem to be solved is how to reasonably adjust the wind speed of the fan under different environmental temperatures and different temperatures of the air-conditioning coil.
Disclosure of Invention
The embodiment of the invention provides a direct current fan adjusting method, a controller and a temperature adjusting system, which realize the adjustment of the wind speed of a direct current fan according to the environment temperature and the temperature of an air conditioner coil.
In a first aspect, an embodiment of the present invention provides a method for adjusting a dc fan, where the method includes:
acquiring the outdoor environment temperature and the liquid pipe temperature according to the current regulation period;
calculating a temperature difference correction parameter of the current regulation period according to the outdoor environment temperature and the liquid pipe temperature;
calculating the wind speed variation according to the temperature difference correction parameter of the current regulation period and the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period;
and adjusting the wind speed of the direct current fan according to the wind speed variation.
Preferably, the step of calculating the temperature difference correction parameter of the current adjustment period includes:
calculating the temperature difference between the outdoor environment temperature and the liquid pipe temperature;
calculating a temperature difference correction parameter of the current regulation period by using the following temperature difference correction calculation formula group;
Figure BDA0002208180620000021
wherein, TOuter coverCharacterizing the outdoor ambient temperature; delta Ttarget' characterizing the temperature difference correction parameter; Δ T ═ TOuter cover-TliqlCharacterizing the temperature difference; t isliqlCharacterizing the tube temperature.
Preferably, the step of calculating the wind speed variation includes:
comparing the temperature difference correction parameter of the current adjusting period with the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period;
and calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period.
Preferably, the step of calculating the wind speed variation includes:
aiming at the comparison result that the temperature difference correction parameter of the current adjusting period is larger than the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
calculating the wind speed variation by using the following first wind speed variation calculation formula group;
Figure BDA0002208180620000022
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F characterizes the wind speed variation.
Preferably, the step of calculating the wind speed variation includes: aiming at the comparison result that the temperature difference correction parameter of the current adjusting period is equal to the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
calculating the wind speed variation by using the following second wind speed variation calculation formula group;
Figure BDA0002208180620000031
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; Δ F characterizes the wind speed variation.
Preferably, the step of calculating the wind speed variation includes: aiming at the comparison result that the temperature difference correction parameter of the current adjusting period is smaller than the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
calculating the wind speed variation by using a following third wind speed variation calculation formula group;
Figure BDA0002208180620000032
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F characterizes the wind speed variation.
Preferably, the dc fan adjusting method may further include: determining an initial wind speed according to the following starting conditions, and controlling the direct current fan to continuously run for a first set period under the initial wind speed;
the starting conditions include: when the outdoor environment temperature is less than 8 ℃, the initial wind speed is the highest wind speed of the direct current fan; when the outdoor environment temperature is not less than 8 ℃ and not more than 12 ℃, the initial wind speed is 700 rpm; when the outdoor environment temperature is more than 12 ℃, the initial wind speed is 600.
Preferably, the time interval of every two regulation periods is 15-30 s.
In a second aspect, an embodiment of the present invention provides a dc fan adjustment controller, including: an acquisition unit, a parameter calculation unit and a regulation and control unit, wherein,
the acquisition unit is used for acquiring the outdoor environment temperature and the liquid pipe temperature according to the current regulation period;
the parameter calculation unit is configured to calculate a temperature difference correction parameter of a current adjustment period according to the outdoor environment temperature and the liquid pipe temperature acquired by the acquisition unit, and calculate a wind speed variation according to the temperature difference correction parameter of the current adjustment period and a temperature difference correction parameter of a previous adjustment period corresponding to the current adjustment period;
and the regulating and controlling unit is used for regulating the wind speed of the direct current fan according to the wind speed variation calculated by the parameter calculating unit.
Preferably, the parameter calculating unit is configured to calculate a temperature difference between the outdoor environment temperature and the liquid pipe temperature; calculating a temperature difference correction parameter of the current regulation period by using the following temperature difference correction calculation formula group;
Figure BDA0002208180620000041
wherein, TOuter coverCharacterizing the outdoor ambient temperature; delta Ttarget' characterizing the temperature difference correction parameter; Δ T ═ TOuter cover-TliqlCharacterizing the temperature difference; t isliqlCharacterizing the tube temperature.
Preferably, the parameter calculation unit is configured to compare the temperature difference correction parameter of the current adjustment period with the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period; and calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period.
Preferably, the parameter calculation unit is configured to calculate the wind speed variation by using the following first wind speed variation calculation formula group, with respect to the comparison result that the temperature difference correction parameter of the current adjustment period is greater than the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period;
Figure BDA0002208180620000051
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F characterizes the wind speed variation.
Preferably, the parameter calculating unit is configured to calculate the wind speed variation by using the following second wind speed variation calculation formula group, with respect to the comparison result that the temperature difference correction parameter of the current adjustment period is equal to the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period;
Figure BDA0002208180620000052
wherein, Delta Ttarget' (n) a temperature difference correction parameter characterizing the current regulation period n, n being not less than 1A positive integer of (d); Δ F characterizes the wind speed variation.
Preferably, the parameter calculating unit is configured to calculate the wind speed variation by using a following third wind speed variation calculation formula group, with respect to the comparison result that the temperature difference correction parameter of the current adjustment period is smaller than the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period;
Figure BDA0002208180620000053
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F characterizes the wind speed variation.
Preferably, the control unit is further configured to determine an initial wind speed according to the following starting conditions, and control the dc fan to continuously operate for a first set period at the initial wind speed;
the starting conditions include: when the outdoor environment temperature is less than 8 ℃, the initial wind speed is the highest wind speed of the direct current fan; when the outdoor environment temperature is not less than 8 ℃ and not more than 12 ℃, the initial wind speed is 700 rpm; the initial wind speed is 600 degrees when the outdoor ambient temperature is >12 degrees.
In a third aspect, an embodiment of the present invention provides a temperature adjustment system, including: a DC fan adjustment controller, an outdoor unit, and at least one indoor unit connected to the outdoor unit, wherein,
and the direct current fan adjusting controller is used for adjusting and controlling the wind speed of each direct current fan in the outdoor unit.
The embodiment of the invention provides a direct current fan adjusting method, a controller and a temperature adjusting system, wherein the direct current fan adjusting method is used for acquiring the outdoor environment temperature and the liquid pipe temperature aiming at the current adjusting period; calculating a temperature difference correction parameter of the current regulation period according to the outdoor environment temperature and the liquid pipe temperature; calculating the wind speed variation according to the temperature difference correction parameter of the current regulation period and the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period; according to the wind speed variation, the wind speed of the direct current fan is adjusted, and the wind speed variation is directly related to the temperature difference correction parameter of the current adjusting period and the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period, and the temperature difference correction parameter of the current adjusting period or the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period is determined by the outdoor environment temperature and the liquid pipe temperature.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a dc fan adjustment method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a DC fan adjustment method according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a dc fan adjustment controller according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a temperature adjusting system according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a method for adjusting a dc fan, where the method includes:
step 101: acquiring the outdoor environment temperature and the liquid pipe temperature according to the current regulation period;
step 102: calculating a temperature difference correction parameter of the current regulation period according to the outdoor environment temperature and the liquid pipe temperature;
step 103: calculating the wind speed variation according to the temperature difference correction parameter of the current regulation period and the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period;
step 104: and adjusting the wind speed of the direct current fan according to the wind speed variation.
Wherein, the liquid pipe temperature accessible sets up the temperature sensor that the liquid pipe surface detected.
The time length of the adjusting period can be set by a user according to the requirement, and the time interval of every two adjusting periods is 15-30 s. For example, it may be 20s, 30s, etc.
The outdoor ambient temperature may be detected by a thermometer or a temperature sensor disposed in the outside environment.
The temperature difference correction parameter is a parameter determined by the outdoor ambient temperature and the liquid pipe temperature, and is related to both the outdoor ambient temperature and the liquid pipe temperature.
In the embodiment shown in fig. 1, the dc fan adjustment method obtains the outdoor environment temperature and the liquid pipe temperature for the current adjustment period; calculating a temperature difference correction parameter of the current regulation period according to the outdoor environment temperature and the liquid pipe temperature; calculating the wind speed variation according to the temperature difference correction parameter of the current regulation period and the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period; and adjusting the wind speed of the direct current fan according to the wind speed variation. Because the wind speed variation is directly related to the temperature difference correction parameter of the current regulation period and the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period, and the temperature difference correction parameter of the current regulation period or the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period is determined by the outdoor environment temperature and the liquid pipe temperature, the wind speed of the direct current fan can be adjusted according to the environment temperature and the temperature of the air-conditioning coil pipe by the scheme provided by the invention.
In an embodiment of the present invention, in order to enable smooth start of the dc fan, the dc fan adjustment method may further include: determining an initial wind speed according to the following starting conditions, and controlling the direct current fan to continuously run for a first set period under the initial wind speed;
the starting conditions include: when the outdoor environment temperature is less than 8 ℃, the initial wind speed is the highest wind speed of the direct current fan; when the outdoor environment temperature is not less than 8 ℃ and not more than 12 ℃, the initial wind speed is 700 rpm; when the outdoor environment temperature is higher than 12 ℃, the initial wind speed is 600;
the duration corresponding to the first setting period is generally not less than 3min, and preferably the duration of the first setting period is 5 min. Namely, after the dc fan is started for a duration corresponding to the first setting period, the step 101 is executed.
It should be noted that, when the current adjustment period is the first adjustment period after the first setting period, the previous adjustment period corresponding to the current adjustment period is the first setting period, and the outdoor environment temperature and the liquid pipe temperature in the first setting period can be obtained.
In another embodiment of the present invention, the detailed implementation of step 102 may be: calculating the temperature difference between the outdoor environment temperature and the liquid pipe temperature; calculating a temperature difference correction parameter of the current regulation period by using the following temperature difference correction calculation formula group;
Figure BDA0002208180620000081
wherein, TOuter coverCharacterizing the outdoor ambient temperature; delta Ttarget' characterizing a temperature difference correction parameter; Δ T ═ TOuter cover-TliqlCharacterizing the temperature difference; t isliqlThe tube temperature is characterized.
It should be noted that the process of calculating the temperature difference between the outdoor ambient temperature and the liquid pipe temperature may be a part of the calculation formula set for the temperature difference correction.
The specific implementation of the step 103 may be: comparing the temperature difference correction parameter of the current regulation period with the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period;
and calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period.
The comparison may be a magnitude comparison between the temperature difference correction parameter of the current adjustment period and the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period, i.e. calculating Δ Ttarget’(n)-ΔTtargetWhether' (n-1) is greater than 0, equal to 0, or less than 0, there are three possibilities for the comparison result, the first being Δ Ttarget’(n)-ΔTtarget(n-1) > 0, namely the temperature difference correction parameter of the current regulation period is greater than the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period; the second possibility is Δ Ttarget’(n)-ΔTtarget(n-1) is equal to 0, namely the temperature difference correction parameter of the current adjusting period is equal to the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period; a third possibility is Δ Ttarget’(n)-ΔTtarget' (n-1) < 0, namely the temperature difference correction parameter of the current adjusting period is smaller than the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period.
The results for the comparison are the first possibility: delta Ttarget’(n)-ΔTtarget' (n-1) > 0, namely the temperature difference correction parameter of the current adjusting period is larger than the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
the specific implementation manner of calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period may be as follows: calculating the wind speed variation by using the following first wind speed variation calculation formula group;
Figure BDA0002208180620000091
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F represents the wind speed variation.
The result for the comparison is a second possibility: delta Ttarget’(n)-ΔTtarget' n-1 is 0, namely the temperature difference correction parameter of the current adjusting period is equal to the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
the specific implementation manner of calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period may be as follows: calculating the wind speed variation by using the following second wind speed variation calculation formula group;
Figure BDA0002208180620000101
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; Δ F represents the wind speed variation.
The results for the comparison are a third possibility: delta Ttarget’(n)-ΔTtarget' (n-1) < 0, that is, the temperature difference correction parameter of the current adjustment period is smaller than the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period,
the specific implementation manner of calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period may be as follows: calculating the wind speed variation by using a following third wind speed variation calculation formula group;
Figure BDA0002208180620000102
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period n(ii) a Δ F represents the wind speed variation.
The adjusted wind speed of the direct current fan is the wind speed before adjustment plus the wind speed variable quantity.
The direct current fan adjusting method can be applied to air source heat pumps, household air conditioners, central air conditioners, ground source heat pumps and the like.
It is worth mentioning that when the air source heat pump, the household air conditioner, the central air conditioner or the ground source heat pump has at least two direct current fans, the wind speeds of the two direct current fans are kept consistent all the time.
In order to clearly illustrate the adjustment method of the dc fan, the following description will be made by taking the regulation of the wind speed of the dc fan on the air source heat pump as an example. The air source heat pump is arranged outdoors, the wire controller is arranged indoors, the highest wind speed of the direct current fan can be set on the wire controller, the highest wind speed is transmitted to a controller, namely a Central Processing Unit (CPU), of the air source heat pump through 485 communication, and the running range of the direct current fan is set between the lowest rotating speed 600 and the highest rotating speed on the controller. As shown in fig. 2, the specific implementation steps of the method for adjusting the direct current fan may include:
step 201: acquiring outdoor environment temperature, determining initial wind speed according to the outdoor environment temperature, and controlling the direct current fan to continuously operate for a first set period under the initial wind speed;
the specific implementation of determining the initial wind speed according to the outdoor ambient temperature may be determined according to preset starting conditions, which include: when the outdoor environment temperature is less than 8 ℃, the initial wind speed is the highest wind speed of the direct current fan; when the outdoor environment temperature is more than or equal to 8 ℃ and less than or equal to 12 ℃, the initial wind speed is 700 rpm; the initial wind speed was 600 at outdoor ambient temperatures >12 degrees. For example, if the outdoor temperature is-12 degrees, the initial wind speed is the highest wind speed of the direct current fan.
Step 202: acquiring the outdoor environment temperature and the liquid pipe temperature according to the current regulation period;
the outdoor ambient temperature can be obtained by a temperature sensor arranged outdoors, and the liquid pipe temperature can be obtained by a temperature sensor arranged on the liquid pipe.
The time interval of every two regulation periods is 15-30 s. Preferably 20 s.
Step 203: calculating the temperature difference between the outdoor environment temperature and the liquid pipe temperature;
step 204: calculating a temperature difference correction parameter of the current regulation period according to the outdoor environment temperature and the temperature difference;
the specific implementation of this step may be: calculating a temperature difference correction parameter of the current regulation period by using the following temperature difference correction calculation formula group;
Figure BDA0002208180620000111
wherein, TOuter coverCharacterizing the outdoor ambient temperature; delta Ttarget' characterizing a temperature difference correction parameter; Δ T ═ TOuter cover-TliqlCharacterizing the temperature difference; t isliqlThe tube temperature is characterized.
Step 205: comparing the temperature difference correction parameter of the current regulation period with the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period;
step 206: calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period;
the specific implementation of this step 206 may be:
the result for comparison is Δ Ttarget’(n)-ΔTtarget' (n-1) > 0, namely the temperature difference correction parameter of the current adjusting period is larger than the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
calculating the wind speed variation by using the following first wind speed variation calculation formula group;
Figure BDA0002208180620000121
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F characterizing wind speed variation；
The result for comparison is Δ Ttarget’(n)-ΔTtarget' n-1 is 0, namely the temperature difference correction parameter of the current adjusting period is equal to the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
calculating the wind speed variation by using the following second wind speed variation calculation formula group;
Figure BDA0002208180620000122
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; Δ F represents the wind speed variation;
the result for comparison is Δ Ttarget’(n)-ΔTtarget' (n-1) < 0, that is, the temperature difference correction parameter of the current adjustment period is smaller than the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period,
calculating the wind speed variation by using a following third wind speed variation calculation formula group;
Figure BDA0002208180620000131
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F represents the wind speed variation.
Step 207: and adjusting the wind speed of the direct current fan according to the wind speed variation.
The adjusted wind speed is the wind speed before adjustment plus the wind speed variation.
As shown in fig. 3, an embodiment of the present invention provides a dc fan adjustment controller, including: an obtaining unit 301, a parameter calculating unit 302, and a regulating unit 303, wherein,
an obtaining unit 301, configured to obtain an outdoor environment temperature and a liquid pipe temperature for a current adjustment period;
a parameter calculating unit 302, configured to calculate a temperature difference correction parameter of a current adjustment period according to the outdoor environment temperature and the liquid pipe temperature acquired by the acquiring unit 301, and calculate a wind speed variation according to the temperature difference correction parameter of the current adjustment period and a temperature difference correction parameter of a previous adjustment period corresponding to the current adjustment period;
and the regulating unit 303 is configured to regulate the wind speed of the direct current fan according to the wind speed variation calculated by the parameter calculating unit 302.
In another embodiment of the present invention, the parameter calculating unit 302 is configured to calculate a temperature difference between an outdoor environment temperature and a liquid pipe temperature; calculating a temperature difference correction parameter of the current regulation period by using the following temperature difference correction calculation formula group;
Figure BDA0002208180620000132
wherein, TOuter coverCharacterizing the outdoor ambient temperature; delta Ttarget' characterizing a temperature difference correction parameter; Δ T ═ TOuter cover-TliqlCharacterizing the temperature difference; t islialThe tube temperature is characterized.
In another embodiment of the present invention, the parameter calculating unit 302 is configured to compare the temperature difference correction parameter of the current adjustment period with the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period; and calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period.
In another embodiment of the present invention, the parameter calculating unit is configured to calculate the wind speed variation by using the following first wind speed variation calculation formula group, with respect to the comparison result that the temperature difference correction parameter of the current adjustment period is greater than the temperature difference correction parameter of the previous adjustment period corresponding to the current adjustment period;
Figure BDA0002208180620000141
wherein, Delta Ttarget’(n) Representing a temperature difference correction parameter of a current adjustment period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F represents the wind speed variation.
In another embodiment of the present invention, the parameter calculating unit 302 is configured to calculate the wind speed variation by using the following second wind speed variation calculating formula set, with respect to the comparison result that the temperature difference correction parameter of the current adjusting period is equal to the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period;
Figure BDA0002208180620000142
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; Δ F represents the wind speed variation.
In another embodiment of the present invention, the parameter calculating unit 302 is configured to calculate the wind speed variation by using the following third wind speed variation calculating formula set, with respect to the comparison result that the temperature difference correction parameter of the current adjusting period is smaller than the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period;
Figure BDA0002208180620000151
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F represents the wind speed variation.
In another embodiment of the present invention, the adjusting and controlling unit 303 is further configured to determine an initial wind speed according to the following starting conditions, and control the dc fan to continuously operate for a first set period at the initial wind speed;
the starting conditions include: when the outdoor environment temperature is less than 8 ℃, the initial wind speed is the highest wind speed of the direct current fan; when the outdoor environment temperature is more than or equal to 8 ℃ and less than or equal to 12 ℃, the initial wind speed is 700 rpm; when the outdoor environment temperature is more than 12 ℃, the initial wind speed is 600.
The direct current fan adjusting controller can be applied to air source heat pumps, household air conditioners, central air conditioners, ground source heat pumps and the like.
It is worth to be noted that when the air source heat pump, the household air conditioner, the central air conditioner or the ground source heat pump is provided with at least two direct current fans, the wind speeds of the at least two direct current fans are regulated and controlled to be consistent all the time.
The information interaction, execution process and other contents between the units in the device are based on the same concept as the system embodiment of the present invention, and specific contents can be referred to the description in the system embodiment of the present invention, and are not described herein again.
As shown in fig. 4, an embodiment of the present invention provides a temperature adjustment system, including: any one of the above-mentioned dc fan adjustment controller 401, the outdoor unit 402, and at least one indoor unit 403 connected to the outdoor unit, wherein,
the dc fan adjustment controller 401 is configured to adjust and control a wind speed of each dc fan in the outdoor unit 402.
The temperature adjusting system can be an air source heat pump, a household air conditioner, a central air conditioner, a ground source heat pump and the like.
The embodiment of the invention provides a readable medium which comprises an execution instruction, and when a direct current fan adjustment controller executes the execution instruction, a direct current fan adjusts and executes any direct current fan adjusting method provided by the embodiment of the invention.
The memory is used for storing the execution instruction, the direct current fan adjusting controller is connected with the memory through the bus, and when the direct current fan adjusting controller runs, the direct current fan adjusting controller executes the execution instruction stored in the memory so that the direct current fan adjusting controller can execute any direct current fan adjusting method provided by the embodiment of the invention.
The embodiments of the invention have at least the following beneficial effects:
1. in the embodiment of the invention, the outdoor environment temperature and the liquid pipe temperature are acquired aiming at the current regulation period; calculating a temperature difference correction parameter of the current regulation period according to the outdoor environment temperature and the liquid pipe temperature; calculating the wind speed variation according to the temperature difference correction parameter of the current regulation period and the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period; according to the wind speed variation, the wind speed of the direct current fan is adjusted, and the wind speed variation is directly related to the temperature difference correction parameter of the current adjusting period and the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period, and the temperature difference correction parameter of the current adjusting period or the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period is determined by the outdoor environment temperature and the liquid pipe temperature.
2. In the embodiment of the invention, the initial wind speed is determined according to the starting condition, and the direct current fan is controlled to continuously run for a first set period under the initial wind speed; the starting conditions include: when the outdoor environment temperature is less than 8 ℃, the initial wind speed is the highest wind speed of the direct current fan; when the outdoor environment temperature is more than or equal to 8 ℃ and less than or equal to 12 ℃, the initial wind speed is 700 rpm; when the outdoor environment temperature is higher than 12 ℃, the initial wind speed is 600; the direct current fan can be started stably through the process.
3. In the embodiment of the invention, tests show that the constructed temperature difference correction calculation formula group, the first wind speed variation calculation formula group, the second wind speed variation calculation formula group and the third wind speed variation calculation formula group can enable the wind speed variation to be calculated more accurately, so that the operation of the temperature regulating system can reach the optimal energy-saving state.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (8)

1. A method for adjusting a direct current fan is characterized by comprising the following steps:
acquiring the outdoor environment temperature and the liquid pipe temperature according to the current regulation period;
calculating a temperature difference correction parameter of the current regulation period according to the outdoor environment temperature and the liquid pipe temperature;
calculating the wind speed variation according to the temperature difference correction parameter of the current regulation period and the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period;
adjusting the wind speed of the direct current fan according to the wind speed variation;
the step of calculating the temperature difference correction parameter of the current adjusting period comprises the following steps:
calculating the temperature difference between the outdoor environment temperature and the liquid pipe temperature;
calculating a temperature difference correction parameter of the current regulation period by using the following temperature difference correction calculation formula group;
Figure FDA0002641600900000011
wherein, TOuter coverCharacterizing the outdoor ambient temperature; delta Ttarget' characterizing the temperature difference correction parameter; Δ T ═ TOuter cover-TliqlCharacterizing the temperature difference; t isliqlCharacterizing the tube temperature.
2. The method of claim 1, wherein the step of calculating the wind speed variation comprises:
comparing the temperature difference correction parameter of the current adjusting period with the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period;
and calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period.
3. The method of claim 2, wherein the step of calculating the wind speed variation comprises:
aiming at the comparison result that the temperature difference correction parameter of the current adjusting period is larger than the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
calculating the wind speed variation by using the following first wind speed variation calculation formula group;
Figure FDA0002641600900000021
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F represents the wind speed variation;
and/or the presence of a gas in the gas,
aiming at the comparison result that the temperature difference correction parameter of the current adjusting period is equal to the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
calculating the wind speed variation by using the following second wind speed variation calculation formula group;
Figure FDA0002641600900000022
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; Δ F represents the wind speed variation;
and/or the presence of a gas in the gas,
aiming at the comparison result that the temperature difference correction parameter of the current adjusting period is smaller than the temperature difference correction parameter of the previous adjusting period corresponding to the current adjusting period,
calculating the wind speed variation by using a following third wind speed variation calculation formula group;
Figure FDA0002641600900000023
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F characterizes the wind speed variation.
4. The method according to any one of claims 1 to 3, wherein the DC fan is a fan,
further comprising:
determining an initial wind speed according to the following starting conditions, and controlling the direct current fan to continuously run for a first set period under the initial wind speed;
the starting conditions include: when the outdoor environment temperature is less than 8 ℃, the initial wind speed is the highest wind speed of the direct current fan; when the outdoor environment temperature is not less than 8 ℃ and not more than 12 ℃, the initial wind speed is 700 rpm; when the outdoor environment temperature is higher than 12 ℃, the initial wind speed is 600 rpm;
and/or the presence of a gas in the gas,
the time interval of every two regulation periods is 15-30 s.
5. A dc fan adjustment controller, comprising: an acquisition unit, a parameter calculation unit and a regulation and control unit, wherein,
the acquisition unit is used for acquiring the outdoor environment temperature and the liquid pipe temperature according to the current regulation period;
the parameter calculation unit is configured to calculate a temperature difference correction parameter of a current adjustment period according to the outdoor environment temperature and the liquid pipe temperature acquired by the acquisition unit, and calculate a wind speed variation according to the temperature difference correction parameter of the current adjustment period and a temperature difference correction parameter of a previous adjustment period corresponding to the current adjustment period;
the regulating and controlling unit is used for regulating the wind speed of the direct current fan according to the wind speed variation calculated by the parameter calculating unit;
the parameter calculation unit is used for calculating the temperature difference between the outdoor environment temperature and the liquid pipe temperature; calculating a temperature difference correction parameter of the current regulation period by using the following temperature difference correction calculation formula group;
Figure FDA0002641600900000041
wherein, TOuter coverCharacterizing the outdoor ambient temperature; delta Ttarget' characterizing the temperature difference correction parameter; Δ T ═ TOuter cover-TliqlCharacterizing the temperature difference; t isliqlCharacterizing the tube temperature.
6. The DC fan regulation controller of claim 5,
the parameter calculation unit is used for comparing the temperature difference correction parameter of the current regulation period with the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period; and calculating the wind speed variation by using the comparison result and the temperature difference correction parameter of the current regulation period.
7. The DC fan regulation controller of claim 6,
the parameter calculation unit is used for calculating the wind speed variation by utilizing the following first wind speed variation calculation formula group aiming at the comparison result that the temperature difference correction parameter of the current regulation period is larger than the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period;
Figure FDA0002641600900000042
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F represents the wind speed variation;
and/or the presence of a gas in the gas,
the parameter calculation unit is used for calculating the wind speed variation by utilizing the following second wind speed variation calculation formula group aiming at the comparison result that the temperature difference correction parameter of the current regulation period is equal to the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period;
Figure FDA0002641600900000051
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; Δ F represents the wind speed variation;
and/or the presence of a gas in the gas,
the parameter calculation unit is used for calculating the wind speed variation by utilizing the following third wind speed variation calculation formula group aiming at the comparison result that the temperature difference correction parameter of the current regulation period is smaller than the temperature difference correction parameter of the previous regulation period corresponding to the current regulation period;
Figure FDA0002641600900000052
wherein, Delta Ttarget' (n) characterizing a temperature difference correction parameter of a current regulation period n, wherein n is a positive integer not less than 1; delta Ttarget' (n-1) characterizing a temperature difference correction parameter of a previous adjusting period corresponding to the current adjusting period n; Δ F represents the wind speed variation;
and/or the presence of a gas in the gas,
the control unit is further used for determining an initial wind speed according to the following starting conditions and controlling the direct current fan to continuously operate for a first set period under the initial wind speed;
the starting conditions include: when the outdoor environment temperature is less than 8 ℃, the initial wind speed is the highest wind speed of the direct current fan; when the outdoor environment temperature is not less than 8 ℃ and not more than 12 ℃, the initial wind speed is 700 rpm; the initial wind speed is 600rpm when the outdoor ambient temperature is >12 degrees.
8. A temperature conditioning system, comprising: the DC fan adjustment control of any one of claims 5 to 7, an outdoor unit, and at least one indoor unit connected to the outdoor unit,
and the direct current fan adjusting controller is used for adjusting and controlling the wind speed of each direct current fan in the outdoor unit.
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