CN115682569A - Fan delayed start control method and device and air cooler unit - Google Patents
Fan delayed start control method and device and air cooler unit Download PDFInfo
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- 230000003111 delayed effect Effects 0.000 title claims abstract description 31
- 238000010257 thawing Methods 0.000 claims abstract description 94
- 238000001816 cooling Methods 0.000 claims abstract description 37
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- 239000007788 liquid Substances 0.000 description 13
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Abstract
The invention provides a fan delayed start control method, a control device and an air cooler unit, relates to the technical field of air conditioners and solves the technical problem that after defrosting is finished, if an air cooler corresponding to a defrosting heat exchanger is started immediately, heat stored in the air cooler is diffused into a refrigeration house, and the temperature of the refrigeration house is greatly increased in the prior art. After the defrosting of the air cooling unit is completed, the defrosting heat exchanger refrigerates, but the air cooling machine corresponding to the defrosting unit is not immediately started, and the starting is delayed, so that the heat stored in the air cooling machine is prevented from being diffused into the refrigeration house, and the temperature of the refrigeration house is greatly increased. In addition, the control method provided by the invention also comprises the steps of correcting the value of the delay time tau; the corrected delay time is stored to be used as the delay starting time of the fan after the defrosting of the follow-up cold air unit is finished, and the delay starting time of the fan after the next defrosting can be automatically calculated according to the working condition, so that the reasonable delay starting time of the fan can be obtained, and the fluctuation of the indoor temperature can be reduced as much as possible.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fan delayed start control method, a fan delayed start control device and an air cooler unit.
Background
When the refrigeration cold air machine set for the refrigeration house is used for defrosting, the temperature of the refrigeration house Wen Wensheng cannot exceed the limit temperature in order to ensure the quality of food in the refrigeration house. For the unit using the duplex air cooler, one group of air cooler units is defrosted, and the other group of air cooler units is refrigerated. When the defrosting is finished, the defrosting heat exchanger refrigerates, if the air cooler corresponding to the defrosting heat exchanger is immediately started, the heat stored in the air cooler can be diffused into the refrigeration house, the temperature of the refrigeration house is greatly increased, in addition, a part of liquid refrigerant is remained in the finned tube heat exchanger due to the defrosting, the air cooler is directly started, and the part of liquid can directly enter the air suction port of the compressor to cause the wet compression of the compressor.
Referring to fig. 1, a duplex air cooler unit for a refrigeration house is schematically shown, and mainly comprises a compressor 1, an air-cooled condenser 2, a liquid storage device 3, a first electronic expansion valve 4, a first electromagnetic valve 5, a second electromagnetic valve 6, a third electromagnetic valve 7, a fourth electromagnetic valve 8, a second electronic expansion valve 9, a fifth electromagnetic valve 10, a sixth electromagnetic valve 11, a seventh electromagnetic valve 12, an eighth electromagnetic valve 13, a first finned tube air cooler 14 and a second finned tube air cooler 15. The following 2 operation modes can be provided according to different refrigerant flow directions of the unit:
a cooling mode: the first finned tube air cooler 14 and the second finned tube air cooler 15 refrigerate simultaneously, the two air coolers are connected in series, and the flow direction of the refrigerant is as follows: the air conditioner comprises a compressor 1, an air-cooled condenser 2, a liquid storage device 3, a solenoid valve I5, an electronic expansion valve I4, a finned tube air cooler I14, a solenoid valve III 7 and the compressor 1; the air-cooled type air conditioner comprises a compressor 1, an air-cooled type condenser 2, a liquid storage device 3, a solenoid valve five 10, an electronic expansion valve two 9, a finned tube air cooler two 15, a solenoid valve seven 12 and the compressor 1.
Defrosting mode: during the defrosting, two air-coolers are established ties, and one refrigerates, and one defrosts, the refrigerant flows through the defrosting air-cooler and flows to refrigeration air-cooler after obtaining the super-cooled rate by frost layer supercooling to defrost finned tube air-cooler 14, finned tube air-cooler two 15 refrigerate for the example, and the refrigerant flow direction is: the compressor 1-air-cooled condenser 2-reservoir 3-two solenoid valve 6-four solenoid valve 8-two electronic expansion valve 9-seven solenoid valve 12-compressor 1.
Disclosure of Invention
The invention aims to provide a fan delayed start control method, a fan delayed start control device and an air cooler unit, and solves the technical problems that after defrosting is finished, if an air cooler corresponding to a defrosting heat exchanger is started immediately, heat stored in the air cooler is diffused into a refrigeration house, and the temperature of the refrigeration house is greatly increased in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a control method for delaying starting of a fan, which comprises the following steps: judging whether the defrosting of the heat exchanger of the cold air unit is finished or not; and if so, controlling the heat exchanger of the air cooling unit to refrigerate and controlling the fan delay starting time tau of the air cooling unit.
Further, correcting the value of the delay time tau; and storing the corrected delay time to be used as the delay starting time of the fan after the defrosting of the subsequent air cooling unit is finished.
Further, the value of the modified delay time τ includes the following: detecting whether the compressor has superheat degree, and correcting the delay time tau to form a corrected delay time tau 1 (ii) a Judging whether the room temperature condition is satisfied or not, and delaying for a time tau 1 To form a corrected delay time tau 2 (ii) a Storing the corrected delay time tau 2 As the start delay time of the subsequent blower.
Further, the correction of the delay time τ is carried out to form a corrected delay time τ 1 The method comprises the following steps: judging whether the compressor has superheat degree after the air cooler delays the starting time tau; if not, the value of the added delay time tau is corrected to form a corrected delay time tau 1 (ii) a If yes, determining the delay time tau as the corrected delay time tau 1 。
Further, the modification increases the delay time τ value to form a modified delay time τ 1 The method comprises the following steps: judging whether the compressor has the superheat degree at intervals of preset time and calculating the number k of accumulated judgment when the condition that the compressor has the superheat degree is met 1 (ii) a Controlling the value of the corrected delay time tau to increase by k 1 * Epsilon to form a corrected delay time tau 1 Wherein ε is a predetermined value>0。
Further, the proceeding delay time τ 1 To form a corrected delay time tau 2 The method comprises the following steps: judging whether the indoor temperature meets the condition; if not, the delay time tau is corrected and reduced 1 Value to form a corrected delay time tau 2 (ii) a If yes, determining the correction delay time tau 1 I.e. to correct the delay time tau 2 。
Further, the modification reduces the delay time τ value to form a modified delay time τ 2 The method comprises the following steps: judging whether the indoor temperature meets the condition every preset time interval and calculating the number k of accumulated judgments when the indoor temperature meets the condition 2 (ii) a Controlling the corrected delay time tau 1 Value reduction k 2 * Theta to form a corrected delay time tau 2 (ii) a Storing the corrected delay time tau 2 As the start delay time of the subsequent fan; wherein theta is a preset value and theta>0。
Further, whether the compressor has the superheat degree is judged, and the method comprises the following steps: judging the temperature t of the air suction port of the compressor suc Temperature t of outlet of heat exchanger tube of cold air unit fan Whether the difference value of (a) is less than a preset value gamma; if yes, judging that the compressor has the superheat degree.
Further, whether the indoor temperature meets the condition is judged, and the following contents are included: judging the actual room temperature t s With target room temperature t m Whether the difference value of (d) is less than a preset value delta; if yes, judging that the indoor temperature meets the condition.
Furthermore, correcting the delay time tau after the defrosting of the air cooler is finished every time; alternatively, when the set condition is satisfied, the delay time τ is corrected.
Further, the determining whether the defrosting is finished includes: if the temperature difference between the rear tube bank and the front tube bank of the heat exchanger of the air cooling unit is smaller than a preset temperature value alpha and/or the humidity difference between the relative humidity of the air in the rear tube bank and the relative humidity of the air in the front tube bank of the heat exchanger of the air cooling unit is smaller than a preset humidity value beta; and judging that the defrosting of the heat exchanger of the cold air unit is finished.
And further, when the first defrosting of the cold air unit is finished, the stored time tau is the time preset by the system.
The present invention provides a control device, including: the defrosting end judging module is used for judging whether defrosting is finished or not; and the fan starting control module controls the delayed starting of the fan.
And further, the correction delay time tau module is used for determining the corrected delay time to be used as the fan delay starting time after the defrosting of the subsequent air cooling unit is finished.
The invention provides an air cooler unit, comprising: one or more memories having executable programs stored thereon; one or more processors configured to execute the executable program in the memory to implement the method.
The invention has the beneficial effects that: the invention provides a fan delayed start control method applicable to a duplex air cooler unit for a refrigeration house, wherein when the air cooler unit completes defrosting, a defrosting heat exchanger is used for refrigerating, but an air cooler corresponding to the defrosting unit is not started immediately but is started in a delayed manner, so that the heat stored in the air cooler is prevented from being diffused into the refrigeration house, and the temperature of the refrigeration house is greatly increased; at the same time, the wet compression of the compressor can be reduced. In addition, if the defrosting heat exchanger is used for refrigerating but the air cooler corresponding to the defrosting heat exchanger is not started for a long time, the temperature of the storage still rises, and therefore the starting delay time of the fan is set reasonably.
The preferred embodiment of the present invention also has the following advantageous effects:
the invention provides a fan delay start control method, which also comprises the steps of correcting the value of delay time tau; the corrected delay time is stored to be used as the delay starting time of the fan after the defrosting of the follow-up cold air unit is finished, and the delay starting time of the fan after the next defrosting can be automatically calculated according to the working condition, so that the reasonable delay starting time of the fan can be obtained, and the fluctuation of the indoor temperature can be reduced as much as possible.
Drawings
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 described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a duplex air cooler unit for a cold storage according to the prior art;
fig. 2 is a flowchart of a method for controlling delayed start of a fan according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for controlling delayed start of a wind turbine according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a control device according to an embodiment of the present invention.
FIG. 1, a compressor; 2. an air-cooled condenser; 3. a reservoir; 4. a first electronic expansion valve; 5. a first electromagnetic valve; 6. a second electromagnetic valve; 7. a third electromagnetic valve; 8. a fourth electromagnetic valve; 9. a second electronic expansion valve; 10. a fifth electromagnetic valve; 11. a sixth electromagnetic valve; 12. a seventh electromagnetic valve; 13. an eighth electromagnetic valve; 14. a finned tube air cooler I; 15. a finned tube air cooler II; 100. a control device; 101. a defrosting end judgment module; 102. a fan starting control module; 103. and a modified delay time tau module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a fan delayed start control method applicable to a duplex air cooler unit for a refrigeration house, which comprises the following steps: judging whether defrosting is finished or not; and if so, controlling the heat exchanger of the cold air unit to refrigerate and controlling the fan of the cold air unit to delay the starting time tau.
Referring to fig. 1, a duplex air cooler unit for a cold storage is illustrated. One group of cold air unit is used for defrosting, and the other group of cold air unit is used for refrigerating. When defrosting finishes, the defrosting heat exchanger refrigerates, if open the air-cooler that defrosting heat exchanger corresponds immediately, the heat of storing in the air-cooler can be diffused to the freezer, makes storehouse temperature rise by a wide margin, in addition, remains partly liquid refrigerant because of the defrosting among the finned tube heat exchanger, directly opens the air-cooler, and this part liquid can directly get into the compressor induction port, causes the wet compression of compressor. Therefore, after the defrosting of the cold air unit is finished, the liquid supply valve is opened (the defrosting heat exchanger is used for refrigerating), but the cold air unit corresponding to the defrosting unit is not immediately opened, but is started in a delayed manner. Namely judging whether the heat exchanger of the cold air unit is defrosted; and if so, controlling the heat exchanger of the cold air unit to refrigerate and controlling the fan of the cold air unit to delay the starting and storing time tau.
The following is described with respect to the case where delaying the start of the air cooler reduces the wet compression of the compressor: when the air cooler is started in a delayed mode, the defrosting heat exchanger can absorb heat stored in the air cooler when refrigerating, refrigerant gasification in the finned tube heat exchanger is facilitated, and the condition of wet compression of the compressor is reduced.
When a set of air-cooler defrosted, another group of air-cooler refrigerates, only a set of air-cooler refrigeration can lead to the refrigerating output not enough for a long time, is difficult to maintain target storehouse temperature, can make the storehouse temperature rise. In addition, if the defrosting heat exchanger is used for refrigerating but the air cooler corresponding to the defrosting heat exchanger is not started for a long time, the temperature of the storage still rises continuously. Therefore, the delay starting time of the fan should be reasonably set. The invention provides a fan delay start control method, which also comprises the steps of correcting the value of delay time tau; the corrected delay time is stored to be used as the delay starting time of the fan after the defrosting of the follow-up cold air unit is finished, the delay starting time of the fan after the next defrosting can be automatically calculated according to the working condition, so that the reasonable delay starting time of the fan can be conveniently obtained, and the fluctuation of the indoor temperature can be reduced as much as possible.
Here, it is to be noted that, when the first defrosting of the cooling air unit is finished, the stored time τ is a preset time. The method is characterized in that a preset time is preset in a system and serves as a delay starting time of the air cooler after the first defrosting of the air cooler is finished, and after the subsequent defrosting is finished, the delay starting time of the air cooler is the corrected delay time.
Regarding the value of the corrected delay time τ, the following is included: detecting whether the compressor has superheat degree, and correcting the delay time tau to form a corrected delay time tau 1 (ii) a Judging whether the room temperature condition is met or not, and delaying for time tau 1 To form a corrected delay time tau 2 (ii) a Storing the corrected delay time tau 2 As a subsequent start-up delay time. I.e., the correction of the delay time τ, is related not only to the degree of superheat of the compressor but also to the room temperature condition. The delay time is limited through two conditions, so that reasonable delay starting time of the fan is convenient to obtain, and fluctuation of indoor temperature is reduced as much as possible.
Performing a correction of the delay time τ to form a corrected delay time τ 1 The method comprises the following steps: judging whether the compressor has superheat degree after the air cooler delays the starting time tau; if not, the value of the added delay time tau is corrected to form a corrected delay time tau 1 (ii) a If yes, determining the delay time tau as the corrected delay time tau 1 。
When the air cooler is started in a delayed mode, the defrosting heat exchanger can absorb heat stored in the air cooler when refrigerating, and the refrigerant in the finned tube heat exchanger is gasified, so that the superheat degree of an air suction port of the compressor is formed. Therefore, if the compressor has no superheat after the start time τ of the air cooler is delayed, the delayed time of the air cooler is still not long enough, so the value of the delay time τ is corrected and increased. Through the judgment of the degree of superheat of the compressor,to determine a corrected delay time tau 1 。
Adding a value of the delay time tau with respect to the correction to form a corrected delay time tau 1 The method comprises the following steps: judging whether the compressor has the superheat degree at intervals of preset time and calculating the number k of accumulated judgment when the condition that the compressor has the superheat degree is met 1 (ii) a Controlling the value of the corrected delay time tau to increase by k 1 * Epsilon to form a corrected delay time tau 1 Wherein ε is a predetermined value>0。
For example, after the interval is set, the superheat degree of the compressor is judged, and k is determined 1 If not 1, then τ 1 = τ + ε; for example, the number k of accumulated judgments is calculated when the condition of the compressor having the degree of superheat is satisfied 1 Is 2, then τ 1 ＝τ+2*ε。
With respect to the time of implementation of delay τ 1 To form a corrected delay time tau 2 The method comprises the following steps: judging whether the indoor temperature meets the condition; if not, the delay time tau is corrected and reduced 1 Value to form a corrected delay time tau 2 (ii) a If yes, determining the correction delay time tau 1 I.e. to correct the delay time tau 2 。
When judging whether the indoor temperature meets the condition, the air cooler started in a delayed mode is started. If the indoor temperature does not meet the condition, namely the indoor actual temperature is higher than the target temperature, the delay time of the air cooler is too long, the indoor actual temperature is influenced, so the delay time tau is corrected and reduced at the moment 1 The value is obtained. By judging the indoor temperature to form a corrected delay time tau 2 . Subsequent storage of the corrected delay time tau 2 As the start delay time of the subsequent blower.
Reducing the value of the delay time tau with respect to the correction to form a corrected delay time tau 2 The method comprises the following steps: judging whether the indoor temperature meets the condition every preset time interval and calculating the number k of accumulated judgments when the indoor temperature meets the condition 2 (ii) a Controlling the corrected delay time tau 1 Value reduction k 2 * Theta to form a corrected delay time tau 2 (ii) a Storing the corrected delay time tau 2 As the start delay time of the subsequent fan, wherein theta is a preset value and theta>0。
For example, after the interval setting time, if the indoor temperature is judged to satisfy the condition, k is determined 2 =1, then τ 2 ＝τ 1 - θ; for example, the number k of accumulated judgments is calculated when it is judged that the indoor temperature satisfies the condition 1 Is 2, then τ 2 ＝τ 1 -2*θ。
Here, the adjustment steps θ and ∈ may be set to the same value or may be set to different values.
Judging whether the compressor has the superheat degree, wherein the judgment comprises the following steps: judging the temperature t of the air suction port of the compressor suc Temperature t of outlet of heat exchanger tube of cold air unit fan Whether the difference value of (a) is less than a preset value gamma; if yes, judging that the compressor has the superheat degree. Regarding the preset value gamma, the preset value gamma is an in-system preset value; and the temperature t of the air inlet suc And the outlet temperature t of the heat exchanger tube of the cold air unit fan To detect the temperature value.
Judging whether the indoor temperature meets the conditions or not, wherein the judgment comprises the following steps: judging the actual room temperature t s With target room temperature t m Whether the difference value of (d) is less than a preset value delta; if yes, judging that the indoor temperature meets the condition. With respect to the preset value δ and the target room temperature t m The value is a system preset value; and the actual room temperature t s And is the detected temperature value.
Regarding the value of the correction delay time tau, the correction delay time tau is carried out after defrosting of the air cooler is finished every time, and the corrected delay time is stored to be used as the fan delay starting time after defrosting of the subsequent air cooler unit is finished; alternatively, when the set condition is satisfied, the delay time τ is corrected. For example, the delay time τ may be corrected after defrosting several times. Preferably, the delay time tau is corrected after the defrosting of the air cooler is finished every time.
Regarding the judgment of whether defrosting is finished or not, the following contents are included: if the temperature difference between the rear tube bank and the front tube bank of the heat exchanger of the air cooling unit is smaller than a preset temperature value alpha and/or the humidity difference between the relative humidity of the air in the rear tube bank and the relative humidity of the air in the front tube bank of the heat exchanger of the air cooling unit is smaller than a preset humidity value beta; and judging that the defrosting of the heat exchanger of the air cooling unit is finished.
Namely, it may be: if the temperature difference between the rear tube bank and the front tube bank of the heat exchanger of the air cooling unit is smaller than a preset temperature value alpha or the humidity difference between the relative humidity of the air in the rear tube bank and the relative humidity of the air in the front tube bank of the heat exchanger of the air cooling unit is smaller than a preset humidity value beta; and judging that the defrosting of the heat exchanger of the cold air unit is finished. But it is preferably judged as follows:
judging whether the temperature difference between the rear calandria and the front calandria of the heat exchanger of the air cooling unit is smaller than a preset temperature value alpha or not;
if so, judging whether the humidity difference between the relative humidity of the air in the rear row pipe and the relative humidity of the air in the front row pipe of the heat exchanger of the air cooling unit is smaller than a preset humidity value beta or not;
if yes, the defrosting of the heat exchanger of the air cooling unit is finished.
Regarding the rear calandria and the front calandria of the heat exchanger of the air cooling unit, according to the flow direction of the refrigerant entering the heat exchange tube of the air cooling unit, the finned tube through which the refrigerant flows first in the same flow path is the front calandria, and the finned tube through which the refrigerant flows later is the rear calandria. Generally, the frosting amount of the rear row tube is less than the defrosting amount of the front row tube, the tube wall temperature of the front row tube is much lower than that of the rear row tube due to the cooling of a large amount of frost layers, and when the heat exchanger is defrosted, the difference between the tube wall temperature of the front row tube and the tube wall temperature of the rear row tube is gradually reduced, so that the temperature difference between the rear row tube and the front row tube of the heat exchanger of the air cooler unit is less than a preset temperature value alpha, and the temperature difference is used as a condition for judging whether defrosting is finished or not.
Similarly, because the frosting amount of the rear row pipe is less than the defrosting amount of the front row pipe, the relative air humidity of the rear row pipe is greater than the relative air humidity of the front row pipe, and when the heat exchanger is defrosted, the difference between the relative air humidity of the front row pipe and the relative air humidity of the rear row pipe is gradually reduced, so that the difference between the relative air humidity of the rear row pipe and the relative air humidity of the front row pipe of the heat exchanger of the air cooler unit is less than a humidity preset value beta, and the difference is used as a condition for judging whether defrosting is finished.
Referring to fig. 3 below, a specific embodiment of a method for controlling delayed start of a fan of a duplex air cooler unit applicable to a refrigeration storage is shown:
and S01, judging whether the cold air unit meets defrosting conditions or not, and if the cold air unit meets the defrosting conditions, switching the refrigeration mode of the unit to the defrosting mode.
Whether the cold air unit meets the defrosting condition can be judged by adopting the prior art, and excessive description is not given herein.
And S02, judging whether the defrosting end condition is met, if not, continuing defrosting, and if so, continuing to perform the step S03.
The defrosting end conditions are as follows: if rear calandria t of cold air unit heat exchanger 2 And the front row pipe t 1 The temperature difference is less than a preset temperature value alpha and the relative humidity of the air in the rear tube bank of the heat exchanger of the air cooling unit
Relative humidity of air in front row pipe
Is less than a predetermined humidity value beta (i.e., t in fig. 2) 2 -t 1 <α,
) (ii) a And judging that the defrosting of the heat exchanger of the cold air unit is finished.
And S03, finishing defrosting, and when liquid supply refrigeration is started to be carried out on the air cooling unit heat exchanger after defrosting, and at the moment, not starting the heat exchanger for the air cooling unit.
Referring to fig. 1, when defrosting, a refrigerant flows to a compressor 1, an air-cooled condenser 2, a reservoir 3, a solenoid valve two 6, a solenoid valve four 8, an electronic expansion valve two 9, a solenoid valve seven 12 and the compressor 1.
After the defrosting is finished, the liquid supply valve is opened (the defrosting heat exchanger refrigerates), but the air cooler corresponding to the defrosting unit is not immediately opened, and the refrigerant flows to: the air conditioner comprises a compressor 1, an air-cooled condenser 2, a liquid storage device 3, a solenoid valve I5, an electronic expansion valve I4, a finned tube air cooler I14, a solenoid valve III 7 and the compressor 1; the air-cooled type air conditioner comprises a compressor 1, an air-cooled type condenser 2, a liquid storage device 3, a solenoid valve five 10, an electronic expansion valve two 9, a finned tube air cooler two 15, a solenoid valve seven 12 and the compressor 1.
And step S04, after the defrosting is finished, recording the delay starting time of the (cold) fan at the moment.
Namely, after defrosting is finished, liquid supply refrigeration is carried out on the heat exchanger of the air cooling unit after defrosting, at the moment, the heat exchanger does not open the air cooling unit, the delay starting time of the (cold) fan is recorded at the moment, and the air cooling unit is started after the air cooling unit delays tau.
S05, judging whether the compressor has superheat degree after the air cooler delays the starting time tau; if not, the value of the added delay time tau is corrected to form a corrected delay time tau 1 (ii) a If yes, determining the delay time tau as the corrected delay time tau 1 。
Adding a value of the delay time tau with respect to the correction to form a corrected delay time tau 1 The method comprises the following steps: judging whether the compressor has the superheat degree at intervals of preset time and calculating the number k of accumulated judgment when the condition that the compressor has the superheat degree is met 1 (ii) a Controlling the value of the corrected delay time tau to increase by k 1 * Epsilon to form a corrected delay time tau 1 (τ 1 ＝τ+k 1 * ε), wherein ε is a predetermined value and ε>0。
Regarding the judgment of the presence or absence of the degree of superheat of the compressor: judging the temperature t of the air suction port of the compressor suc Temperature t of outlet of heat exchanger tube of air cooler unit fan Whether the difference of (a) is less than a preset value gamma (t) suc -t fan <γ); if yes, judging that the compressor has the superheat degree.
S06, judging whether the indoor temperature meets the condition; if not, the delay time tau is corrected and reduced 1 Value to form a corrected delay time tau 2 (ii) a If yes, determining the correction delay time tau 1 I.e. to correct the delay time tau 1 。
Reducing the value of the delay time tau with respect to the correction to form a corrected delay time tau 2 The method comprises the following steps: judging whether the indoor temperature meets the condition every preset time interval and calculating the number k of accumulated judgments when the indoor temperature meets the condition 2 (ii) a Controlling the corrected delay time tau 1 Value reduction k 2 * Theta to form a corrected delay time tau 2 (i.e.. Tau.) 2 ＝τ 1 -k 2 * θ); storing the corrected delay time tau 2 As the start delay time of the subsequent blower.
Judging whether the indoor temperature meets the conditions or not, wherein the judgment comprises the following steps: judging the actual room temperature t s With target room temperature t m Whether the difference of (d) is less than a preset value delta (t) s -t m <δ); if yes, the indoor temperature is judged to meet the conditions.
Step S07, output storage time τ = correction delay time τ 2 And the time is used as the starting delay time of the fan after the defrosting of the subsequent air cooling unit is finished.
A control device 100 comprising: a defrosting end judgment module 101 for judging whether defrosting is ended; the fan starting control module 102 is used for controlling the fan to delay the starting of the storage time tau; and the correction delay time tau module 103 is used for determining the corrected delay time to be used as the fan delay starting time after the defrosting of the subsequent air cooling unit is finished.
An air cooler assembly comprising: one or more memories having executable programs stored thereon; one or more processors configured to execute the executable programs in the memory to perform the method steps.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (15)
1. A method for controlling delayed starting of a fan is characterized by comprising the following steps:
judging whether the defrosting of the heat exchanger of the cold air unit is finished or not;
and if so, controlling the heat exchanger of the air cooling unit to refrigerate and controlling the fan delay starting time tau of the air cooling unit.
2. The method for controlling the delayed start of the fan according to claim 1, further comprising the following steps:
correcting the value of the delay time tau;
and storing the corrected delay time to be used as the delay starting time of the fan after the defrosting of the subsequent air cooling unit is finished.
3. The fan delay start control method of claim 2, wherein the modified delay time τ value comprises the following:
detecting whether the compressor has superheat degree, and correcting the delay time tau to form a corrected delay time tau 1 ；
Judging whether the room temperature condition is met or not, and delaying for time tau 1 To form a corrected delay time tau 2 ；
Storing the corrected delay time tau 2 As the subsequent fan start-up delay time.
4. Method for controlling the delayed activation of a fan according to claim 3, characterised in that said correction of the delay time τ is carried out so as to form a corrected delay time τ 1 The method comprises the following steps:
judging whether the compressor has superheat degree after the air cooler delays the starting time tau;
if not, the value of the added delay time tau is corrected to form a corrected delay time tau 1 ；
If yes, determining the delay time tau as the corrected delay time tau 1 。
5. Fan delay start control method according to claim 4, characterized in that the modification increases the value of the delay time τ to form a modified delay time τ 1 The method comprises the following steps:
judging whether the compressor has the superheat degree at intervals of preset time and calculating the number k of accumulated judgment when the condition that the compressor has the superheat degree is met 1 ；
Controlling the value of the corrected delay time tau to increase by k 1 * Epsilon to form a corrected delay time tau 1 WhereinEpsilon is a predetermined value and>0。
6. the method of claim 3, wherein the time τ is delayed 1 To form a corrected delay time tau 2 The method comprises the following steps:
judging whether the indoor temperature meets the condition;
if not, the delay time tau is corrected and reduced 1 Value to form a corrected delay time tau 2 ；
If yes, determining the correction delay time tau 1 I.e. to correct the delay time tau 2 。
7. The method of claim 6, wherein the modifying the reduced delay time τ value to form a modified delay time τ value 2 The method comprises the following steps:
judging whether the indoor temperature meets the condition every preset time interval and calculating the number k of accumulated judgments when the indoor temperature meets the condition 2 ；
Controlling the corrected delay time tau 1 Value reduction k 2 * Theta to form a corrected delay time tau 2 ；
Storing the corrected delay time tau 2 As the start delay time of the subsequent fan;
wherein theta is a preset value and theta is greater than 0.
8. The fan delayed start control method according to claim 3, wherein the judging whether the compressor has the superheat degree comprises the following contents:
judging the temperature t of the air suction port of the compressor suc Temperature t of outlet of heat exchanger tube of cold air unit fan Whether the difference value of (a) is less than a preset value gamma;
if yes, judging that the compressor has the superheat degree.
9. The fan delayed start control method according to claim 3, wherein judging whether the indoor temperature satisfies a condition includes:
judging the actual room temperature t s With target room temperature t m Whether the difference value of (d) is less than a preset value delta;
if yes, judging that the indoor temperature meets the condition.
10. The fan delayed start control method according to claim 2, characterized in that the delay time τ is corrected after the defrosting of the air cooler is finished each time; alternatively, when the set condition is satisfied, the delay time τ is corrected.
11. The fan delayed start control method according to claim 1, wherein the judging whether defrosting is finished includes:
if the temperature difference between the rear tube bank and the front tube bank of the heat exchanger of the air cooling unit is smaller than a preset temperature value alpha and/or the humidity difference between the relative humidity of the air in the rear tube bank and the relative humidity of the air in the front tube bank of the heat exchanger of the air cooling unit is smaller than a preset humidity value beta;
and judging that the defrosting of the heat exchanger of the cold air unit is finished.
12. The fan delayed start control method according to claim 2, wherein the stored time τ is a preset time of the system when the first defrosting of the cold air unit is finished.
13. A control device, characterized by comprising:
the defrosting end judging module is used for judging whether defrosting is finished or not;
and the fan starting control module controls the delayed starting of the fan.
14. The control device according to claim 13, characterized by further comprising:
and the correction delay time tau module is used for determining the corrected delay time to be used as the delay starting time of the fan after the defrosting of the subsequent air cooling unit is finished.
15. An air cooler unit is characterized by comprising
One or more memories having executable programs stored thereon;
one or more processors to execute the executable program in the memory to implement the method of any one of claims 1-12.
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