CN112066611B - Ice machine water injection control method based on flowmeter pulse compensation - Google Patents

Ice machine water injection control method based on flowmeter pulse compensation Download PDF

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CN112066611B
CN112066611B CN202010968418.7A CN202010968418A CN112066611B CN 112066611 B CN112066611 B CN 112066611B CN 202010968418 A CN202010968418 A CN 202010968418A CN 112066611 B CN112066611 B CN 112066611B
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value
water injection
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delta
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CN112066611A (en
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彭孟杰
束仁志
程劲兰
孔祥耀
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Changhong Meiling Co Ltd
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Changhong Meiling Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C1/00—Producing ice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2400/00—Auxiliary features or devices for producing, working or handling ice
    • F25C2400/14—Water supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2600/00—Control issues
    • F25C2600/04—Control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25C2700/04—Level of water

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Production, Working, Storing, Or Distribution Of Ice (AREA)

Abstract

The invention discloses an ice machine water injection control method based on flowmeter pulse compensation, and relates to the technical field of ice machine control. The method comprises the steps that when water flows through a flowmeter sensing element to generate a pulse signal with known frequency in the water injection process of the ice maker, the pulse signal is filtered by hardware and then is obtained by a master control MCU port in real time, so that the master control MCU calculates the pulse number in unit time and compares the pulse number with preset pulse values of all gears to judge whether the current pulse value is in accordance with the expectation or not, if not, the pulse value variable is compensated and corrected, the corrected pulse value is compared with a target pulse value, and if the target pulse value is reached, water injection is stopped. According to the invention, the water flow is monitored and evaluated in real time in the water injection process of the ice maker, and the closed-loop control of the water injection amount is realized by compensating and correcting the pulse, so that the ice output size of a user is always maintained at a stable value.

Description

Ice machine water injection control method based on flowmeter pulse compensation
Technical Field
The invention belongs to the technical field of ice machine control, and particularly relates to an ice machine water injection control method based on flowmeter pulse compensation.
Background
Today, with the development of scientific technology, ice makers are provided to more and more refrigerator products. In order to ensure the uniform ice making size of the ice making machine, the control of the water injection amount is the most critical link in the ice making system. The flowmeter is comparatively outstanding in accurate control water injection volume, but in the in-service use, still can lead to the water injection volume to have great deviation under the water pressure abnormal conditions, and water pressure is low excessively and too high all can lead to the flowmeter pulse to lose, thereby leads to the water injection volume too much to cause the water to spill over, influences the ice-making effect of ice machine. Therefore, a method for controlling water injection of an ice maker based on pulse compensation of a flowmeter is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide an ice machine water injection control method based on flowmeter pulse compensation, and aims to solve the problems in the background technology.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an ice machine water injection control method based on flowmeter pulse compensation, which comprises the following steps;
step one, when an ice making request is generated, a main control MCU of the ice making machine controls a water injection valve to be opened, and water injection is started to an ice making box; the water flow passes through a flow meter and outputs a corresponding pulse signal; the main control MCU debounces and samples the pulse signals according to a preset value T1, and finds a rising edge or a falling edge; wherein a valid rising or falling edge is identified as a valid pulse;
step two, when the water injection valve is switched from a closed state to an open state, carrying out primary initialization on related variables of water injection control, including pulse counting and accumulating variable NpReset and buffer N for pulse countpbClearing, clearing a timer with a preset value T2 and newly adding a pulse variable delta N in a time period T2pClearing; after the initialization is finished, the pulse counting accumulated variable N of the current water flow is acquired in real timep；
Step three, pre-dividing the newly added pulse variable generated in the time period of T2 into N gears, and respectively recording the boundary value of each gear as N0、N1、N2...NnN is an integer, 0, 1, 2.; wherein N is0＝0，N1～NnAll satisfy greater than 0 and less than NmaxAnd satisfy N0＜N1＜N2...Nn-2＜Nn-1＜Nn，NmaxA maximum value preset for the boundary value;
step four, starting the timing interruption of the preset value T2, and adding a pulse variable delta N in each T2 time periodpThe evaluation was carried out as follows:
A. the first time the interrupt of T2 is entered, a pulse count cumulative variable N is generatedp1At this time Np1Is namely delta Np1For Δ Np1Carrying out evaluation; then N is addedp1Buffer memory, and mark as Npb1；
B. Generating a pulse count accumulation variable N upon a second interrupt entering T2p2At this time,. DELTA.Np2＝Np2-Npb1For Δ Np2Carrying out evaluation; then N is addedp2To carry outBuffer, denoted as Npb2；
C. Repeating the operation of the step B along with the accumulation of the water filling time, namely: generating a pulse count accumulation variable N when the X-th interruption of the T2pxAt this time,. DELTA.Npx＝Npx-Npb(x-1)For Δ NpxCarrying out evaluation; then N is addedpxBuffer memory, and mark as Npbx(ii) a Wherein X is a positive integer;
step five, combining the step three, and comparing the delta N generated in the step fourpxThe judgment is specifically as follows:
A. when Δ Npx＜N1When the fault gear of the flow meter is determined, the control system of the ice maker starts a time control mechanism to control the closing of the water injection valve so as to finish the secondary water injection;
B. when Δ Npx≥NnWhen the water injection pulse in the time period of T2 is determined as an ideal pulse gear, the control system of the ice maker does not compensate and correct the pulse count, and the value of the newly added pulse variable is directly executed with a subsequent judgment mechanism;
C. when N is present1≤ΔNpx＜NnWhen the water injection pulse in the time period of T2 is determined as a gear to be compensated, the control system of the ice maker performs compensation correction on the value of the newly added pulse variable and then executes a subsequent judgment mechanism;
step six, aiming at the newly added pulse variable value delta N generated in the current time period T2pxThe specific compensation mechanism after the gear needing to be compensated is judged as follows;
setting M stages of compensation correction, and respectively setting the correction value corresponding to each stage as delta M1、ΔM2...ΔMmM is a positive integer, and each correction value satisfies Δ M1＞ΔM2＞...ΔMm-1＞ΔMm(ii) a Wherein m ismax＝nmax-2；
When N is present1≤ΔNpx＜N2For Δ N, topxImplementing a 1-stage compensation correction, i.e. a corrected pulse value Δ Np’＝ΔNpx+ΔM1；
When N is present2≤ΔNpx＜N3For Δ N, topxImplementing a 2-stage compensation correction, i.e. a corrected pulse value Δ Np’＝ΔNpx+ΔM2；
...
When N is presentn-1≤ΔNpx＜NnFor Δ N, topxImplementing m-stage compensation corrections, i.e. corrected pulse values Δ Np’＝ΔNpx+ΔMm；
At the value delta N of newly added pulse variablepxIn the correction process, the control system of the ice maker judges the corrected delta N in real timepWhether or not it is larger than the target set pulse count value Mp(ii) a When Δ Np’＞MpWhen the water injection is finished, the water injection valve is closed.
The invention has the following beneficial effects:
the invention generates pulse signals with known frequency when water flows through the flowmeter sensing element during the water filling process of the ice maker, the pulse signal is filtered by hardware and then acquired by a port of the master control MCU in real time, so that the master control MCU calculates the pulse number in unit time and compares the pulse number with the pulse value of each preset gear, to determine whether the current pulse value is in accordance with the expectation, if not, the pulse value variable is compensated and corrected, the corrected pulse value is compared with the target pulse value, if the target pulse value is reached, the water injection is stopped, the water flow can be monitored and evaluated in real time in the water injection process of the ice maker, the closed-loop control of the water injection amount is realized through the compensation and correction of the pulse, therefore, the ice output size of the user is always kept at a stable value, the ice output size of the user can be effectively ensured to be always stable, and the ice output device has high market application value.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method for controlling water injection of an ice maker based on flow meter pulse compensation according to the present invention;
FIG. 2 is a flow chart of a pulse evaluation mechanism of an ice maker water injection control method based on flowmeter pulse compensation according to the invention;
FIG. 3 is a flow chart of the pulse compensation mechanism of the ice maker water filling control method based on the flowmeter pulse compensation of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention is a method for controlling water injection of an ice maker based on pulse compensation of a flow meter, comprising the following steps:
step one, when an ice making request is generated, a main control MCU of the ice making machine controls a water injection valve to be opened, and water injection is started to an ice making box; the water flow passes through a flow meter and outputs a corresponding pulse signal; the main control MCU debounces and samples the pulse signals according to a preset value T1, and finds a rising edge or a falling edge; wherein a valid rising or falling edge is identified as a valid pulse;
step two, when the water injection valve is switched from a closed state to an open state, carrying out primary initialization on related variables of water injection control, including pulse counting and accumulating variable NpReset and buffer N for pulse countpbClearing, clearing a timer with a preset value T2 and newly adding a pulse variable delta N in a time period T2pClearing; after the initialization is finished, the pulse counting accumulated variable N of the current water flow is acquired in real timep；
Step three, pre-dividing the newly added pulse variable generated in the time period of T2 into N gears, and respectively recording the boundary value of each gear as N0、N1、N2...NnN is an integer, 0, 1, 2.; wherein N is0＝0，N1～NnAll satisfy greater than 0 and less than NmaxAnd satisfy N0＜N1＜N2...Nn-2＜Nn-1＜Nn，NmaxA maximum value preset for the boundary value;
step four, starting the timing interruption of the preset value T2, and adding a pulse variable delta N in each T2 time periodpThe evaluation was carried out as follows:
A. the first time the interrupt of T2 is entered, a pulse count cumulative variable N is generatedp1At this time Np1Is namely delta Np1For Δ Np1Carrying out evaluation; then N is addedp1Buffer memory, and mark as Npb1；
B. Generating a pulse count accumulation variable N upon a second interrupt entering T2p2At this time,. DELTA.Np2＝Np2-Npb1For Δ Np2Carrying out evaluation; then N is addedp2Buffer memory, and mark as Npb2；
C. Repeating the operation of the step B along with the accumulation of the water filling time, namely: generating a pulse count accumulation variable N when the X-th interruption of the T2pxAt this time,. DELTA.Npx＝Npx-Npb(x-1)For Δ NpxCarrying out evaluation; then N is addedpxBuffer memory, and mark as Npbx(ii) a Wherein X is a positive integer;
step five, combining the step three, and comparing the delta N generated in the step fourpxThe judgment is specifically as follows:
A. when Δ Npx＜N1When the fault gear of the flow meter is determined, the control system of the ice maker starts a time control mechanism to control the closing of the water injection valve so as to finish the secondary water injection;
B. when Δ Npx≥NnWhen the water filling pulse of the T2 time period is determined to be an ideal pulse gear, the control system of the ice maker willThe pulse count is not compensated and corrected, and the value of the newly added pulse variable is directly executed with a subsequent judgment mechanism;
C. when N is present1≤ΔNpx＜NnWhen the water injection pulse in the time period of T2 is determined as a gear to be compensated, the control system of the ice maker performs compensation correction on the value of the newly added pulse variable and then executes a subsequent judgment mechanism;
step six, aiming at the newly added pulse variable value delta N generated in the current time period T2pxThe specific compensation mechanism after the gear needing to be compensated is judged as follows;
setting M stages of compensation correction, and respectively setting the correction value corresponding to each stage as delta M1、ΔM2...ΔMmM is a positive integer, and each correction value satisfies Δ M1＞ΔM2＞...ΔMm-1＞ΔMm(ii) a Wherein m ismax＝nmax-2；
When N is present1≤ΔNpx＜N2For Δ N, topxImplementing a 1-stage compensation correction, i.e. a corrected pulse value Δ Np’＝ΔNpx+ΔM1；
When N is present2≤ΔNpx＜N3For Δ N, topxImplementing a 2-stage compensation correction, i.e. a corrected pulse value Δ Np’＝ΔNpx+ΔM2；
...
When N is presentn-1≤ΔNpx＜NnFor Δ N, topxImplementing m-stage compensation corrections, i.e. corrected pulse values Δ Np’＝ΔNpx+ΔMm；
At the value delta N of newly added pulse variablepxIn the correction process, the control system of the ice maker judges the corrected delta N in real timepWhether or not it is larger than the target set pulse count value Mp(ii) a When Δ Np’＞MpWhen the water injection is finished, the water injection valve is closed.
The invention relates to an ice maker water injection control method based on flowmeter pulse compensation, which is characterized in that when water flows through a flowmeter sensing element to generate a pulse signal with known frequency in the water injection process of an ice maker, the pulse signal is filtered by hardware and then is acquired by a master control MCU port in real time, so that the master control MCU calculates the pulse number in unit time and compares the pulse number with each preset gear of a pulse value to judge whether the current pulse value is in accordance with expectation, and the fault of the flowmeter is determined by the fact that the pulse number in unit time is lower than a preset lower limit value; when the pulse number in unit time is higher than a preset upper limit value, the model is determined to be an ideal model without pulse compensation correction, when the pulse number in unit time is between the preset lower limit value and the preset upper limit value, the model is determined to be a model needing compensation correction, M compensation levels are set, compensation correction of the corresponding levels is performed on the model needing compensation correction, water flow can be monitored and evaluated in real time in the water injection process of the ice maker, closed-loop control over water injection amount is realized through compensation correction of pulses, therefore, the ice output size of a user is guaranteed to be always maintained at a stable value, the ice output size of the user can be effectively guaranteed to be always stable, and the ice output device has high market application value.
The pulse value presetting gear refers to a pulse upper limit value, a pulse lower limit value and a pulse value to be compensated, which are obtained according to experiments and experiences and are used for filling the target water amount in unit time; the unit time pulse upper limit value is that if the number of actually collected pulses in unit time is more than or equal to the upper limit value, the water injection model is determined to be a normal water injection model; the lower limit value of the pulse in unit time is that if the number of the actually collected pulses in unit time is lower than the lower limit value, the flow meter is determined to be in fault; the pulse value to be compensated in unit time refers to a model which is determined to be compensated and corrected if the number of actually acquired pulses in unit time is smaller than the upper limit value of the pulse in unit time and larger than the lower limit value of the pulse in unit time.
The first embodiment is as follows:
an ice machine water injection control method based on flowmeter pulse compensation comprises the following steps:
step one, when an ice making request is generated, a main control MCU of the ice making machine controls a water injection valve to be opened, and water injection is started to an ice making box; the water flow passes through a flow meter and outputs a corresponding pulse signal; the main control MCU debounces and samples the pulse signals according to a preset value T1 which is 0.25ms, and finds rising edges or falling edges; wherein a valid rising or falling edge is identified as a valid pulse;
step two, when the water injection valve is switched from a closed state to an open state, carrying out primary initialization on related variables of water injection control, including pulse counting and accumulating variable NpReset and buffer N for pulse countpbClearing, clearing the data value in the timer with the preset value T2 and adding the pulse variable delta N in the time period T2pClearing; after the initialization is finished, the pulse counting accumulated variable N of the current water flow is acquired in real timep；
Step three, dividing newly added pulse variables generated in the time period of 500ms in T2 into 6 gears in advance, and recording boundary values of the gears as N0、N1、N2、N3、N4、N5(ii) a Wherein N is0＝0，N1～N5All satisfy greater than 0 and less than NmaxAnd satisfy N0＜N1＜N2＜N3＜N4＜N5，NmaxMaximum value preset for boundary value, taking Nmax＝22；
Step four, starting a timing interrupt meter of a preset value T2, and adding a pulse variable delta N in each T2 time periodpThe evaluation was carried out as follows:
A. the first time the interrupt of T2 is entered, a pulse count cumulative variable N is generatedp1At this time Np1Is namely delta Np1For Δ Np1Carrying out evaluation; then N is addedp1Buffer memory, and mark as Npb1；
B. Generating a pulse count accumulation variable N upon a second interrupt entering T2p2At this time,. DELTA.Np2＝Np2-Npb1For Δ Np2Carrying out evaluation; then N is addedp2Buffer memory, and mark as Npb2；
C. Repeating the operation of the step B along with the accumulation of the water filling time, namely: generating a pulse count accumulation variable N when the X-th interruption of the T2pxAt this time,. DELTA.Npx＝Npx-Npb(x-1)For Δ NpxCarrying out evaluation; then N is addedpxBuffer memory, and mark as Npbx(ii) a Wherein X is a positive integer;
step five, combining the step three, and comparing the delta N generated in the step fourpxThe judgment is specifically as follows:
A. when Δ Npx＜N1When the water injection time reaches a preset value T3 which is 5.5s, the control system of the ice maker closes the water injection valve, and finishes the current water injection;
B. when Δ Npx≥N5When the water injection pulse in the time period of T2 is determined as an ideal pulse gear, the control system of the ice maker does not compensate and correct the pulse count, and the value of the newly added pulse variable is directly executed with a subsequent judgment mechanism;
C. when N is present1≤ΔNpx＜N5When the water injection pulse in the time period of T2 is determined as a gear to be compensated, the control system of the ice maker performs compensation correction on the value of the newly added pulse variable and then executes a subsequent judgment mechanism;
step six, aiming at the newly added pulse variable value delta N generated in the current time period T2pxThe specific compensation mechanism after the gear needing to be compensated is judged as follows;
setting 4 stages of compensation correction, and setting the correction value corresponding to each stage as delta M1、ΔM2、ΔM3、ΔM4And each correction value satisfies Δ M1＞ΔM2＞ΔM3＞ΔM4；
When N is present1≤ΔNpx＜N2For Δ N, topxImplementing a 1-stage compensation correction, i.e. a corrected pulse value Δ Np’＝ΔNpx+ΔM1；
When N is present2≤ΔNpx＜N3For Δ N, topxImplementing a 2-stage compensation correction, i.e. a corrected pulse value Δ Np’＝ΔNpx+ΔM2；
When N is present3≤ΔNpx＜N4For the value of deltaNpxImplementing a 2-stage compensation correction, i.e. a corrected pulse value Δ Np’＝ΔNpx+ΔM3；
When N is present4≤ΔNpx＜N5For Δ N, topxImplementing m-stage compensation corrections, i.e. corrected pulse values Δ Np’＝ΔNpx+ΔM4；
At the value delta N of newly added pulse variablepxIn the correction process, the control system of the ice maker judges the corrected delta N in real timepWhether or not it is larger than the target set pulse count value Mp(ii) a When Δ Np’＞MpWhen the water injection is finished, closing the water injection valve; wherein M ispAs a constant, 330 can be taken.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (1)

1. The ice machine water injection control method based on the flowmeter pulse compensation is characterized by comprising the following steps;
step one, when an ice making request is generated, a main control MCU of the ice making machine controls a water injection valve to be opened, and water injection is started to an ice making box; the water flow passes through a flow meter and outputs a corresponding pulse signal; the main control MCU debounces and samples the pulse signals according to a preset value T1, and finds a rising edge or a falling edge; wherein a valid rising or falling edge is identified as a valid pulse;
step two, when the water injection valve is switched from a closed state to an open state, carrying out primary initialization on related variables of water injection control, including pulse counting and accumulating variable NpReset and buffer N for pulse countpbClearing, clearing a timer with a preset value T2 and newly adding a pulse variable delta N in a time period T2pClearing; after the initialization is finished, the pulse counting accumulated variable N of the current water flow is acquired in real timep；
Step three, pre-dividing the newly added pulse variable generated in the time period of T2 into N gears, and respectively recording the boundary value of each gear as N0、N1、N2...NnN is an integer, 0, 1, 2.; wherein N is0＝0，N1～NnAll satisfy greater than 0 and less than NmaxAnd satisfy N0＜N1＜N2...Nn-2＜Nn-1＜Nn，NmaxA maximum value preset for the boundary value;
step four, starting the timing interruption of the preset value T2, and adding a pulse variable delta N in each T2 time periodpThe evaluation was carried out as follows:
A. the first time the interrupt of T2 is entered, a pulse count cumulative variable N is generatedp1At this time Np1Is namely delta Np1For Δ Np1Carrying out evaluation; then N is addedp1Buffer memory, and mark as Npb1；
B. Generating a pulse count accumulation variable N upon a second interrupt entering T2p2At this time,. DELTA.Np2＝Np2-Npb1For Δ Np2Carrying out evaluation; then N is addedp2Buffer memory, and mark as Npb2；
C. Repeating the operation of the step B along with the accumulation of the water filling time, namely: generating a pulse count accumulation variable N when the X-th interruption of the T2pxAt this time,. DELTA.Npx＝Npx-Npb(x-1)For Δ NpxCarrying out evaluation; then N is addedpxBuffer memory, and mark as Npbx(ii) a Wherein X is a positive integer;
step five, combining the step three, and comparing the delta N generated in the step fourpxThe judgment is specifically as follows:
A. when Δ Npx＜N1When the flow meter is judged to be in fault, the control system of the ice makerThe system starts a time control mechanism to control the closing of the water injection valve so as to finish the current water injection;
B. when Δ Npx≥NnWhen the water injection pulse in the time period of T2 is determined as an ideal pulse gear, the control system of the ice maker does not compensate and correct the pulse count, and the value of the newly added pulse variable is directly executed with a subsequent judgment mechanism;
C. when N is present1≤ΔNpx＜NnWhen the water injection pulse in the time period of T2 is determined as a gear to be compensated, the control system of the ice maker performs compensation correction on the value of the newly added pulse variable and then executes a subsequent judgment mechanism;
step six, aiming at the newly added pulse variable value delta N generated in the current time period T2pxThe specific compensation mechanism after the gear needing to be compensated is judged as follows;
setting M stages of compensation correction, and respectively setting the correction value corresponding to each stage as delta M1、ΔM2...ΔMmM is a positive integer, and each correction value satisfies Δ M1＞ΔM2＞...ΔMm-1＞ΔMm(ii) a Wherein m ismax＝nmax-2；
When N is present1≤ΔNpx＜N2For Δ N, topxImplementing a 1-stage compensation correction, i.e. a corrected pulse value Δ Np’＝ΔNpx+ΔM1；
When N is present2≤ΔNpx＜N3For Δ N, topxImplementing a 2-stage compensation correction, i.e. a corrected pulse value Δ Np’＝ΔNpx+ΔM2；
...
When N is presentn-1≤ΔNpx＜NnFor Δ N, topxImplementing m-stage compensation corrections, i.e. corrected pulse values Δ Np’＝ΔNpx+ΔMm；
At the value delta N of newly added pulse variablepxIn the correction process, the control system of the ice maker judges the corrected delta N in real timepWhether or not it is larger than the target set pulse count value Mp(ii) a When Δ Np’＞MpWhen it is considered to be water injectionWhen the completion, the water injection valve is closed.
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