CN114963619A - Electronic throttling assembly, calibration method, electronic equipment and refrigeration system - Google Patents

Electronic throttling assembly, calibration method, electronic equipment and refrigeration system Download PDF

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Publication number
CN114963619A
CN114963619A CN202110192437.XA CN202110192437A CN114963619A CN 114963619 A CN114963619 A CN 114963619A CN 202110192437 A CN202110192437 A CN 202110192437A CN 114963619 A CN114963619 A CN 114963619A
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China
Prior art keywords
expansion valve
calibration
electronic expansion
opening degree
opening
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Pending
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CN202110192437.XA
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Chinese (zh)
Inventor
王永君
许升
虞朝丰
杜烁炜
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Qingdao Haier Smart Technology R&D Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Smart Technology R&D Co Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Smart Technology R&D Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Smart Technology R&D Co Ltd
Priority to CN202110192437.XA priority Critical patent/CN114963619A/en
Publication of CN114963619A publication Critical patent/CN114963619A/en
Pending legal-status Critical Current

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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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The application relates to the technical field of refrigeration, and discloses an electronic throttling assembly which comprises an electronic expansion valve, a first valve body and a second valve body, wherein the electronic expansion valve is provided with a first port and a second port; the first port of the first throttling capillary tube is connected with the first port of the electronic expansion valve in series; the second throttling capillary tube is connected in parallel to a first port and a second port of the electronic expansion valve; and a second port of the electronic expansion valve and a second port of the first throttling capillary tube are respectively connected to a pipeline of the refrigeration system. When the electronic expansion valve is stuck and fails, the refrigeration system in which the electronic expansion valve is located can continue to operate, so that the refrigeration system has the most basic refrigeration/heating capacity, and the safety of the refrigeration system is ensured. Meanwhile, when the flow of the refrigerant is adjusted between the maximum value and the minimum value, the electronic expansion valve can be prevented from being adjusted to the maximum opening degree or the minimum opening degree, the impact on the valve needle is reduced, the phenomenon that the valve needle is clamped is avoided, and the service life of the electronic expansion valve is prolonged. The application also discloses a calibration method, electronic equipment and a refrigeration system.

Description

Electronic throttling assembly, calibration method, electronic equipment and refrigerating system
Technical Field
The present application relates to the field of refrigeration technologies, and for example, to an electronic throttling assembly, a calibration method, an electronic device, and a refrigeration system.
Background
In a refrigeration system, an electronic expansion valve is generally used as an electronic throttle, and the opening degree of the electronic expansion valve is adjusted to adjust the flow rate of refrigerant, thereby realizing different temperature control. The electronic expansion valve is structurally and controls a linear stepping motor similar to a screw rod, and a driver drives a rotor to rotate step by step so as to control the opening of a valve body. When the electronic expansion valve is opened to the maximum opening degree or closed to the minimum opening degree, a clamping phenomenon may occur, so that the opening degree of the electronic expansion valve cannot be controlled, the flow rate of the refrigerant cannot be adjusted, and the cooling/heating capacity of the refrigeration system cannot be adjusted. For example, when the electronic expansion valve jams when closed to a minimum, the refrigeration system is deprived of cooling/heating capacity.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: in the opening degree adjustment process of the electronic expansion valve, the electronic expansion valve inevitably needs to be opened to the maximum opening degree or closed to the minimum opening degree, and in the process, impact can be caused on the valve needle, even the valve needle is stuck, and further the refrigeration system fails.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides an electronic throttling assembly, a calibration method, electronic equipment and a refrigerating system, and aims to solve the technical problem that in the process of opening an electronic expansion valve to a maximum opening degree or closing the electronic expansion valve to a minimum opening degree, impact can be caused on a valve needle, even the valve needle is clamped, and further the refrigerating system fails.
In some embodiments, the electronic throttle assembly comprises: an electronic expansion valve having a first port and a second port; the first throttling capillary tube is connected with the first port of the electronic expansion valve in series; the second throttling capillary tube is connected to the first port and the second port of the electronic expansion valve in parallel; and a second port of the electronic expansion valve and a port of the first throttling capillary tube are respectively connected to a pipeline of the refrigeration system.
In some embodiments, the calibration method comprises: selecting a plurality of calibration opening degrees within the range from the minimum opening degree to the maximum opening degree of an electronic expansion valve of the electronic throttling assembly; controlling the opening degree of the electronic expansion valve to be opened to a plurality of calibrated opening degrees in sequence; and at each calibrated opening, executing the following operations: when the actual temperature reaches a first temperature, controlling the compressor to start running and starting timing; when the actual temperature reaches a second temperature, controlling the compressor to stop and obtaining the starting operation time length; wherein the first temperature is greater than the second temperature; meanwhile, obtaining the refrigerant flow under each calibrated opening; obtaining the correlation between the opening degree of the electronic expansion valve and the refrigerating capacity according to the starting operation duration corresponding to each of the plurality of calibration opening degrees; and obtaining the correlation between the opening degree of the electronic expansion valve and the refrigerant flow according to the refrigerant flow corresponding to each of the plurality of calibrated opening degrees.
In some embodiments, the electronic device comprises a processor and a memory storing program instructions, wherein the processor is configured to execute the aforementioned calibration method when executing the program instructions.
In some embodiments, the refrigeration system comprises: the aforementioned electronic throttle assembly; and, an electronic device.
The electronic throttling component, the calibration method, the control method and the refrigeration system provided by the embodiment of the disclosure can realize the following technical effects:
in the electronic throttling assembly of the embodiment of the disclosure, the first throttling capillary tube connected in series with the electronic expansion valve limits the maximum value of the refrigerating output flow, and the second throttling capillary tube connected in parallel with the electronic expansion valve limits the minimum value of the refrigerating output flow; the opening degree of the electronic expansion valve is adjusted between the maximum value and the minimum value of the refrigerant flow. That is, when the electronic expansion valve is stuck at the maximum opening degree, the first throttle capillary tube can ensure the refrigerant flow rate within the maximum allowable value of the refrigeration system (the minimum throttling capacity of the refrigeration system); when the electronic expansion valve is blocked at the minimum opening degree (or the closed state), the second throttling capillary tube can ensure that the flow of the refrigerant reaches the minimum allowable value (the maximum throttling capacity of the refrigerating system) of the refrigerating system, so that when the electronic expansion valve is blocked and fails, the refrigerating system in which the electronic expansion valve is positioned can still continue to operate, the refrigerating system still has the most basic refrigerating/heating capacity, and the safety of the whole refrigerating system is ensured. And further controlling the start and stop of the compressor through a refrigerating system to achieve the aim of adjusting the refrigerating capacity and controlling the target temperature and realize fault operation. Then the refrigeration system can give an alarm and prompt in the fault operation process. Meanwhile, when the flow of the refrigerant is adjusted between the maximum value and the minimum value, the electronic expansion valve can be prevented from being adjusted to the maximum opening degree or the minimum opening degree, the impact on the valve needle is reduced, the phenomenon that the valve needle is clamped is avoided, and the service life of the electronic expansion valve is prolonged.
The arrangement of the first throttling capillary tube and the second throttling capillary tube in the electronic throttling assembly enables the opening degree of the electronic expansion valve in the electronic throttling assembly to be in a nonlinear correlation with the flow rate of a refrigerant, and the opening degree of the electronic expansion valve and the refrigerating capacity of a refrigerating system to be changed.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic structural diagram of an electronic throttle assembly provided by an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart diagram illustrating a calibration method for an electronic throttle assembly according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart diagram illustrating another method for controlling an electronic throttle assembly according to an embodiment of the present disclosure;
FIG. 4 is a schematic flow chart diagram illustrating another method for controlling an electronic throttle assembly according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of an electronic device provided by an embodiment of the present disclosure;
FIG. 6 is an electronic expansion valve opening versus cooling capacity curve for an electronic throttle assembly provided in accordance with an embodiment of the present disclosure;
fig. 7 is an electronic expansion valve opening versus refrigerant flow curve of an electronic throttle assembly provided in an embodiment of the disclosure.
Reference numerals:
10. an electronic expansion valve; 11. a first pipeline; 12. a second pipeline; 20. a first throttling assembly; 30. a second throttle assembly.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. E.g., a and/or B, represents: a or B, or A and B.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
In the disclosed embodiments, the refrigeration system includes, but is not limited to, an air conditioning refrigeration system, a refrigerator refrigeration system, and the like.
Referring to fig. 1, an electronic throttle assembly according to an embodiment of the present disclosure includes an electronic expansion valve 10, a first throttle capillary 20, and a second throttle capillary 30. The electronic expansion valve 10 has a first port and a second port, and the first port of the first throttle capillary 20 is connected in series with the first port of the electronic expansion valve 10; the second throttling capillary tube 30 is connected in parallel to the first port and the second port of the electronic expansion valve 10. A second port of the electronic expansion valve 10 and a second port of the first throttle capillary tube 20 are respectively connected to a pipeline of the refrigeration system.
In the electronic throttling assembly of the embodiment of the present disclosure, the first throttling capillary tube 20 connected in series with the electronic expansion valve 10 defines the maximum value of the refrigerating capacity flow, and the second throttling capillary tube 30 connected in parallel with the electronic expansion valve 10 defines the minimum value of the refrigerating capacity flow; the opening degree of the electronic expansion valve 10 is adjusted between the maximum value and the minimum value of the refrigerating capacity flow. That is, when the electronic expansion valve is stuck at the maximum opening, the throttling resistance of the refrigeration system is approximately the throttling resistance of the first throttling capillary tube 20, and the resistance is the minimum, so that the refrigerant flow can be ensured within the maximum allowable value of the refrigeration system (the minimum throttling capacity of the refrigeration system); when the electronic expansion valve 10 is stuck at the minimum opening degree (or closed state), the throttling resistance of the refrigeration system is the sum of the throttling resistance of the second throttling capillary tube 30 and the throttling resistance of the first throttling capillary tube 20, the resistance is maximum, the flow rate is minimum, the flow rate of the refrigerant can be ensured to reach the minimum allowable value of the refrigeration system (the maximum throttling capacity of the refrigeration system), and the refrigerant can not directly enter an evaporator in a large amount to cause insufficient evaporation. Therefore, when the electronic expansion valve is stuck and fails, the refrigeration system in which the electronic expansion valve is located can still continue to operate, so that the refrigeration system still has the most basic refrigeration/heating capacity, and the safety of the whole refrigeration system is ensured. And further controlling the start and stop of the compressor through a refrigerating system to achieve the aim of adjusting the refrigerating capacity and controlling the target temperature and realize fault operation. Then the refrigeration system can give an alarm and prompt in the fault operation process. Meanwhile, when the flow of the refrigerant is adjusted between the maximum value and the minimum value, the electronic expansion valve can be prevented from being adjusted to the maximum opening degree or the minimum opening degree, the impact on the valve needle is reduced, the phenomenon that the valve needle is clamped is avoided, and the service life of the electronic expansion valve is prolonged.
In the embodiment of the disclosure, the allowable flow rate of the first throttling capillary tube is determined according to the maximum allowable amount of the refrigerant flow rate of the connected refrigeration system, and the allowable flow rate of the second throttling capillary tube is determined according to the minimum allowable amount of the refrigerant flow rate of the connected refrigeration system.
In some embodiments, the electronic throttle assembly further comprises a first pipeline and a second pipeline respectively connected with the first port and the second port of the electronic expansion valve; the first throttling capillary is connected in series to the first pipeline, and two ends of the second throttling capillary are respectively communicated with the first pipeline and the second pipeline. Make the electron throttle subassembly form a whole, during the use, with the port of first pipeline and the port access refrigeration system's of second pipeline in the pipeline can, the convenient connection.
Referring to fig. 2, in the calibration method of the electronic throttling assembly according to the embodiment of the present disclosure, the electronic throttling assembly is the electronic throttling assembly shown in fig. 1, and is connected to a refrigeration system; the calibration method comprises the following steps:
s110, minimum opening X of electronic expansion valve of electronic throttling assembly min To the maximum opening degree X max Selecting a plurality of calibrated opening degrees, and controlling the opening degrees of the electronic expansion valve to be opened to the plurality of calibrated opening degrees in sequence; wherein, at each calibration opening, the following operations are executed: when the actual temperature reaches a first temperature, controlling the compressor to start running and starting timing; when the actual temperature reaches a second temperature, controlling the compressor to stop and obtaining the starting operation time length; wherein the first temperature is greater than the second temperature; meanwhile, the refrigerant flow at each calibrated opening is obtained.
In this step S110, the starting operation duration corresponding to each of the plurality of calibration opening degrees and the refrigerant flow corresponding to each of the plurality of calibration opening degrees can be obtained.
Optionally, selecting a plurality of calibrated opening degrees, and controlling the opening degrees of the electronic expansion valve to be opened to the plurality of calibrated opening degrees in sequence; the method comprises the following steps: minimum opening X of electronic expansion valve of electronic throttle assembly min To the maximum opening degree X max Within the range of (1), the initial opening degree X is determined 0 (ii) a At or above the initial opening X 0 And maximum opening X max Selecting a plurality of first calibration opening degrees, and controlling the opening degrees of the electronic expansion valve to be opened to the plurality of first calibration opening degrees in sequence in an increasing trend; at less than initial opening X 0 And minimum opening X min And selecting a plurality of second calibration opening degrees, and controlling the opening degrees of the electronic expansion valve to be opened to the plurality of second calibration opening degrees in sequence in a descending trend. In other words, in the calibration process, the opening degree of the electronic expansion valve is calibrated from the middle of the opening degree range to two sides respectively, which is beneficial to the stability of the refrigeration system.
Wherein the initial opening degree X 0 Is not limited to [ X ] min ，X max ]The middle of the range. Alternatively, the initial opening degree X 0 Is equal to or greater than X max (ii)/3 and 2X or less max /3. Alternatively, the initial opening degree X 0 Is equal to X max /2。
In [ X ] 0 ，X max ]Within range, a plurality of first marksThe degrees are arranged from small to large to form a first sequence. In the first array, a plurality of first calibration opening degrees are arranged in an increasing manner, and the increasing manner is not limited, that is, the difference value between every two adjacent first calibration opening degrees is equal, unequal or in a set rule.
Optionally, in the first array, the difference between every two adjacent first calibration opening degrees is equal. A plurality of first calibration opening degrees form an increasing arithmetic progression, and the first calibration opening degrees X i ＝X i-1 +ΔX 1 (ii) a i is 1, 2, … …, m; m is a positive integer, and the number of the first calibration opening degrees; x 0 Is the initial opening.
Optionally, in the first array, the difference between every two adjacent first calibration opening degrees is not equal. Optionally, the plurality of difference values present an increasing equal difference series, and the plurality of first calibration opening degrees form an increasing two-level equal difference series. First calibration opening X i ＝X i-1 +i·ΔX 1 (ii) a i is 1, 2, … …, m; m is a positive integer, and the number of the first calibration opening degrees; x 0 Is the initial opening.
Wherein, Δ X 1 The method is not limited, and the method can be determined according to actual needs. Alternatively, Δ X 1 At X max /20～X max Determined in the range of/5. Alternatively, Δ X 1 At X max /15～X max Determined in the range of/8. Alternatively, Δ X 1 Is X max /10。
Optionally, in the first array, a difference between every two adjacent first calibration opening degrees is a set rule. In [ X ] 0 ，X max ]Within the range, the selection points of the first calibration opening degrees of the front section are more, and the selection points of the first calibration opening degrees of the rear section are less. E.g. at a critical opening X j As a separation point, in [ X ] 0 ，X j ]The difference value of every two adjacent first calibration opening degrees in the range is less than (X) j ，X max ]And every two adjacent first calibration opening difference values in the range. Alternatively, in [ X ] 0 ，X j ]A plurality of first calibration opening degrees in the range are in an arithmetic progression of (X) j ，X max ]The plurality of first calibration opening degrees in the range are in a two-stage arithmetic progression.
The calibration opening degree is selected at the middle part of the opening degree range of the electronic expansion valve, so that the more accurate first correlation relation and second correlation relation can be obtained.
In [ X ] min ，X 0 ) Within the range, the plurality of second calibration opening degrees are arranged from large to small to form a second array. In the second array, the plurality of second calibration opening degrees are arranged in a decreasing manner, and the decreasing manner is not limited, that is, the difference value of every two adjacent first calibration opening degrees is equal, unequal or in a set rule.
Optionally, in the second array, the difference between every two adjacent second calibration opening degrees is equal. A plurality of second calibration opening degrees form a decreasing arithmetic series, and the second calibration opening degrees X p ＝X p-1 –ΔX 2 P is 1, 2, … …, n; n is a positive integer, and the number of the second calibration opening degrees; x0 is the initial opening.
Optionally, in the second array, the difference between every two adjacent second calibration opening degrees is not equal. Optionally, the plurality of difference values present an increasing equal difference series, and the plurality of second calibration opening degrees form an increasing second equal difference series. Second calibration opening X p ＝X p-1 –p·ΔX 2 P is 1, 2, … …, n; n is a positive integer, and the number of the second calibration opening degrees; x 0 Is the initial opening.
Wherein, Δ X 2 The method is not limited, and the method can be determined according to actual needs. Alternatively, Δ X 2 At X max /20～X max Determined in the range of/5. Alternatively, Δ X 2 At X max /15～X max Determined in the range of/8. Alternatively, Δ X 2 Is X max /10。
Optionally, in the second array, the difference between every two adjacent second calibration opening degrees is in a set rule. For example, in [ X ] min ，X 0 ) Within the range, the selection points of the plurality of second calibration opening degrees of the front section are few, and the selection points of the second calibration opening degrees of the rear section are many. For example, with a critical opening Xq as a division point, at [ X ] min ，X q ) The difference value of every two adjacent second calibration opening degrees in the range is more than X q ，X 0 ) And every two adjacent second calibration opening difference values in the range. Alternatively, in [ X ] min ，X q ) Multiple second calibration opening degree in the rangeIn a two-stage arithmetic series of [ X ] q ，X 0 ) And a plurality of second calibration opening degrees in the range are in an arithmetic progression.
The calibration opening degree is selected at the middle part of the opening degree range of the electronic expansion valve, so that the more accurate first correlation relation and second correlation relation can be obtained.
Delta X when the opening degree of the electronic expansion valve is based on the step number of the stepping motor 1 The step (5) to (20); Δ X 2 The method comprises 5-20 steps.
In [ X ] min ，X max ]The plurality of calibration openings are selected within the range, and the selection manner and the selection number are not limited to the above-mentioned exemplary embodiments.
In step S110, the actual temperature is detected by the set temperature sensor. The actual temperature refers to the temperature in the area to be temperature-regulated by the refrigeration system, for example, in an air-conditioning refrigeration system, the actual temperature is the ambient temperature; as another example, in a refrigeration system of a refrigerator, the actual temperature is the temperature of the compartment inside the refrigerator body.
Optionally, the first temperature and the second temperature are determined according to a normal refrigeration temperature of a refrigeration device to which the electronic throttling assembly is applied. For example, in an air conditioning apparatus, the first temperature and the second temperature may be determined based on a normal cooling temperature (e.g., 24 ℃ to 27 ℃).
Optionally, on the basis of the normal refrigeration temperature, a temperature greater than a first difference of the normal refrigeration temperature is taken as the first temperature, and a temperature smaller than a second difference of the normal refrigeration temperature is taken as the second temperature. The first difference and the second difference may be the same or different, and are not limited. Optionally, the first difference is the same as the second difference.
Optionally, the difference between the first temperature and the second temperature is in the range of 2 ℃ to 5 ℃, i.e. the sum of the first difference and the second difference is in the range of 2 ℃ to 5 ℃. For example, the difference is 2 ℃, 3 ℃, 4 ℃ or 5 ℃. The difference between the first temperature and the second temperature within the range can effectively reflect the refrigerating capacity and can minimize the energy consumption.
Optionally, during the operation calibration, the calibration method further includes:
s111, controlling the opening degrees of the electronic expansion valves to be opened to a plurality of first calibrated opening degrees in an increasing trend in sequence; acquiring an ith starting-up operation time length corresponding to the ith first calibration opening; wherein i is more than 1 and less than or equal to m, i is a positive integer, and m is the number of the first calibration opening; and when the ith starting-up operation time length is longer than a first set operation time length, determining the starting-up operation time lengths corresponding to the ith first calibration opening and a first calibration opening larger than the ith first calibration opening as the first set operation time length. The first set operation duration is determined according to the application scene, and optionally, the first set operation duration is not less than 30 min. Optionally, the first set operation time period is 30min to 50 min. For example, the first set operation time period is 30min, 40min, or 50 min.
S112, controlling the opening degrees of the electronic expansion valves to be opened to a plurality of second calibrated opening degrees in sequence in a descending trend; acquiring the p-th starting-up operation time length corresponding to the p-th second calibration opening degree; wherein p is more than 1 and less than or equal to n, p is a positive integer, and n is the number of the second calibration opening degrees; and when the p-th starting-up operation time length is longer than a second set operation time length, determining the starting-up operation time lengths corresponding to the p-th second calibration opening degree and a second calibration opening degree which is larger than the p-th second calibration opening degree as second set operation time lengths. The first set operation duration is determined according to an application scene, and optionally, the second set operation duration is not less than 30 min. Optionally, the second set operation time period is 30min to 50 min. For example, the second set operation time period is 30min, 40min, or 50 min.
And S120, obtaining a correlation (hereinafter referred to as a first correlation) between the opening degree of the electronic expansion valve and the refrigerating capacity according to the starting operation duration corresponding to each of the plurality of calibrated opening degrees.
The shorter the starting operation time corresponding to a certain calibration opening is, the better the refrigerating capacity under the calibration opening is; conversely, the longer the starting operation time is, the worse the refrigerating capacity under the calibration opening degree is. The presentation mode of the correlation between the opening of the electronic expansion valve and the refrigerating capacity may be the electronic expansion valve opening obtained by fitting a plurality of calibrated openings with the respective corresponding starting operation durations thereofThe opening versus the on-time operating duration (as shown in fig. 6, i.e., the electronic expansion valve opening versus the cooling capacity). Alternatively, the presenting manner of the first correlation may be a one-to-one correspondence list relationship between the opening degrees of the electronic expansion valves and the refrigeration capacities, and the opening degrees of the electronic expansion valves in the list are the plurality of calibrated opening degrees selected in step S110. Referring to fig. 6, it can be seen that the opening of the electronic expansion valve is changed from the minimum opening X min To the maximum opening degree X max The time length of the starting operation is increased from big to small and then increased to be a positive parabola with an upward opening, namely the refrigerating capacity of the refrigerating system is increased from low to small and then reduced. The opening corresponding to the minimum starting operation time is the optimal opening X when the refrigerating capacity is maximum effi 。
At the optimum opening degree X effi As a turning point, when the refrigerating capacity of the refrigerating system is improved, the adjusting direction of the opening of the electronic expansion valve is different. The opening of the electronic expansion valve is at a minimum opening X min To the optimum opening degree X effi In the meantime, the refrigerating capacity is improved, and the opening degree of the electronic expansion valve needs to be increased; the opening degree of the electronic expansion valve is in the optimal opening degree X effi To the maximum opening degree X max In between, the refrigeration capacity is improved, and the opening degree of the electronic expansion valve needs to be reduced.
Generally, when the refrigeration system is in the dehumidification operation mode, the opening degree of the electronic expansion valve is at the minimum opening degree X min To the optimum opening degree X effi In between. When the refrigeration system is in the refrigeration working mode, the opening degree of the electronic expansion valve is in the optimal opening degree X effi To the maximum opening degree X max In the meantime.
And S130, acquiring a correlation (hereinafter referred to as a second correlation) between the opening degree of the electronic expansion valve and the refrigerant flow according to the refrigerant flow corresponding to each of the plurality of calibrated opening degrees.
Generally, the larger the opening degree of the electronic expansion valve is, the larger the refrigerant flow rate is, and the relationship is basically linear, however, the first throttle capillary tube and the second throttle capillary tube in the electronic throttle assembly of the embodiment of the present disclosure are arranged so that the opening degree of the electronic expansion valve and the refrigerant flow rate have a non-linear positive correlation. Alternatively, the second correlation may be presented by fitting a plurality of calibrated openings to their respective corresponding refrigerant flows to obtain an electronic expansion valve opening-refrigerant flow rate correlation curve (as shown in fig. 7). Alternatively, the second correlation may be presented in a one-to-one list of electronic expansion valve opening degrees-refrigerant flow rates, where the electronic expansion valve opening degrees in the list are the plurality of calibrated opening degrees selected in step S110.
In the embodiment of the disclosure, the first throttling capillary tube and the second throttling capillary tube in the electronic throttling assembly are arranged, so that the opening degree of the electronic expansion valve in the electronic throttling assembly and the refrigerant flow rate present a nonlinear correlation, and the opening degree of the electronic expansion valve and the refrigerating capacity of the refrigerating system also change, therefore, an adaptive operation calibration method is provided for the electronic throttling assembly, the refrigerating capacity of the refrigerating system is reflected by the starting time of the compressor with the actual temperature changing from the first temperature to the second temperature under the opening degrees (multiple calibration opening degrees) of different electronic expansion valves, and the refrigerant flow rates under different opening degrees are measured at the same time, so that the correlation between the opening degrees of the electronic expansion valve and the refrigerating capacity and the refrigerant flow rate is obtained, and the correlation is used in the subsequent control process.
The calibration method of the electronic throttling assembly of the embodiment of the disclosure is operated during production process/factory detection of the refrigeration equipment to obtain the correlation between the opening degree of the electronic expansion valve and the refrigeration capacity and the refrigerant flow respectively, so as to be used in the subsequent control process. Of course, it may also be integrated into the control process of the refrigeration equipment, and when a certain preset condition is met, the calibration method is started to update the first correlation and the second correlation.
In some embodiments, the calibration method further comprises: acquiring the actual refrigerant flow and the actual opening degree of the electronic expansion valve in the operation process of the refrigeration system; determining the calibrated refrigerant flow corresponding to the actual opening according to the correlation between the opening of the electronic expansion valve and the refrigerant flow; and when the difference value between the actual refrigerant flow and the calibrated refrigerant flow is larger than the preset flow difference value, updating the calibrated refrigerant flow into the actual refrigerant flow. In this embodiment, the second correlation is updated in real time according to the actual refrigerant flow of the refrigeration system during the actual operation process, so as to optimize the mapping relationship between the two, and make the control more stable. Here, the update may be a replacement update of the calibration refrigerant flow rate corresponding to the existing calibration opening degree, or may be an addition of a new calibration opening degree and its corresponding calibration refrigerant flow rate in the second correlation.
In some embodiments, the calibration method further comprises: when it is determined that the correlation (second correlation) between the opening degree of the electronic expansion valve and the cooling capacity is shifted, the calibration method is executed again. In this embodiment, when the second correlation is deviated, the optimum opening X is set effi A change occurs, i.e., the point of maximum efficiency of the refrigerant system shifts. In this case, if the control is performed based on the second relationship, for example, a target adjustment direction for determining the opening degree of the electronic expansion valve in the control method of the electronic throttle unit described below, a problem may occur. Therefore, the electronic throttling assembly needs to be recalibrated to obtain the more accurate second correlation and the first correlation.
In the embodiment, when the calibration method is executed again, the calibration is performed near the target temperature, and the use experience of a user is not influenced. After the calibration method is completed, the system automatically exits and is switched to a control mode before the calibration method is started.
Optionally, in performing the calibration method again, the first temperature T 1 ＝T 0 +ΔT 1 (ii) a Wherein, T 0 Is the target temperature, Δ T 1 Is a first difference value with the value range of 0.5 ℃ and 2 DEG C]. Alternatively, Δ T 1 The value of (C) is [0.8 deg.C, 1.5 deg.C]. Alternatively, Δ T 1 The value of (A) is 1 ℃.
Optionally, in performing the calibration method again, the second temperature T 2 ＝T 0 -ΔT 2 (ii) a Wherein, T 0 Is the target temperature, Δ T 2 Is the second difference value, and the value range is [0.5 ℃, 2 DEG C]. Alternatively, Δ T 2 The values of (1.5 deg.C) are [0.8 deg.C]. Alternatively, Δ T 2 Is 1 ℃.
Alternatively, Δ T 1 And Δ T 2 Have the same or different values.
Optionally, in performing the calibration method again, the initial opening X 0 Determined as the optimum opening degree X in the correlation between the opening degree of the electronic expansion valve and the cooling capacity effi Or, the first opening degree is determined as X max /2。
Optionally, determining that the second correlation relationship is shifted comprises: acquiring the total operation time of the refrigeration system when the refrigeration system is started to operate until the actual temperature reaches the target temperature; and when the total operation time length is not less than the preset total operation time length, determining that the second correlation of the refrigeration system is deviated. In this embodiment, the preset total operation time is 30min to 60 min. That is, if the cooling capacity of the refrigeration system does not reach the standard for a long time, it is considered that the second correlation is shifted, that is, the maximum efficiency point of the refrigeration system is shifted.
Optionally, determining that the second correlation relationship is shifted comprises: the refrigerant leaks slightly. The slight leakage of the refrigerant can be determined according to an alarm system of the refrigeration equipment.
In this embodiment, the triggering condition for executing the calibration method again may be any stage after determining that the second correlation of the refrigeration system is shifted and the refrigeration system is started to operate, that is, the start is performed at any time. Of course, a trigger condition may be further defined to define the timing for executing the calibration method again.
Optionally, after determining that the second correlation relationship is shifted, the method further includes: and sending out reminding information for executing the calibration method again. The user is reminded to start, whether the refrigeration system is started or not can be selected according to the user wish to enable the refrigeration system to enter a calibration mode, and the user experience is improved.
Optionally, after determining that the second correlation relationship is shifted, the method further includes: acquiring a weather temperature parameter; determining the time period within which the variation amplitude of the weather temperature parameter is within a set range according to the weather temperature parameter; when this period is entered, the calibration method is executed again. The calibration accuracy is improved, and the user experience is improved.
In some embodiments, during the process of executing the calibration method again, the method further includes: when the starting operation duration corresponding to each of the plurality of adjacent calibration opening degrees fluctuates, stopping and exiting the calibration method; and the calibration method is not executed in the starting operation process of the refrigerating system. In this embodiment, the fluctuation of the startup operation time means that at least two tooth-shaped breakthroughs appear on the connection line of the startup operation time lengths corresponding to the plurality of adjacent calibration opening degrees respectively. At this time, it is shown that the external environment temperature affects the calibration process, which results in inaccurate calibration.
Referring to fig. 3, in an embodiment of the present disclosure, an electronic throttling assembly is the electronic throttling assembly shown in fig. 1, and is connected to a refrigeration system; the control method comprises the following steps:
s210, after the refrigeration system is determined to be started to operate, the target refrigerant flow of the refrigeration system and the current opening degree of an electronic expansion valve of an electronic throttling component are obtained.
In step S210, the target refrigerant flow rate is determined according to the target temperature and the actual temperature of the refrigeration system. Here, the actual temperature is the same as that described above, and the actual temperature is detected by a temperature sensor provided. The actual temperature refers to the temperature in the area to be temperature-regulated by the refrigeration system, for example, in an air-conditioning refrigeration system, the actual temperature is the ambient temperature; as another example, in a refrigeration system of a refrigerator, the actual temperature is the temperature of the compartment inside the refrigerator body. The target temperature is set by a user according to needs, for example, the target temperature can be 24-27 ℃ for an air-conditioning refrigeration system; for a refrigerator refrigerating system, the target temperature can be a freezing temperature of-18 ℃ to-15 ℃ or a refrigerating temperature of 0 ℃ to 5 ℃.
Optionally, obtaining a target refrigerant flow of the refrigeration system comprises: and determining the target refrigerant flow according to the difference value between the target temperature and the actual temperature.
In step S210, the current opening degree is the opening degree of the electronic expansion valve during the last shutdown, and the obtaining manner is not limited, and the current opening degree may be obtained in real time as the current opening degree after the refrigeration system is started to operate, or the current opening degree stored during the last startup operation may be retrieved from the memory.
Optionally, obtaining the current opening degree of the electronic expansion valve of the electronic throttle assembly includes: when the last shutdown of the refrigeration system is determined to be normal power-off shutdown, calling the current opening stored when the refrigeration system is started and operated last time; and when the last shutdown of the refrigeration system is determined to be abnormal power-off shutdown, controlling the electronic expansion valve to reset, and taking the opening degree of the reset electronic expansion valve as the current opening degree.
Here, the normal power-off shutdown refers to power-off shutdown when the electronic expansion valve is not adjusted, and the abnormal power-off shutdown refers to power-off shutdown during the adjustment process of the electronic expansion valve. When the electronic expansion valve is shut down due to abnormal power failure, the opening of the electronic expansion valve is inaccurate, and one-time forced reset is needed, so that the accuracy of opening adjustment of the electronic expansion valve is ensured.
Optionally, the control method further includes: writing the action mark position of a storage area (for example, a charged erasable programmable read-only memory (EEPROM)) of a controller into a first mark in the electronic expansion valve regulation process; after the electronic expansion valve finishes the regulation action, writing the action mark position of the EEPROM into a second mark. When the action flag position of the storage area (EEPROM area) is the first flag, the power is abnormally cut off and the computer is shut down; when the action flag position of the storage area (EEPROM area) is the second flag, the power is normally cut off and the computer is shut down. In the present embodiment, the specific form of the first mark and the second mark is not limited as long as they can be distinguished from each other. For example, the first flag is 1 and the second flag is 0.
Optionally, determining whether the last shutdown of the refrigeration system is a normal power-off shutdown comprises: detecting the action mark position of the storage area; when the action mark position is a second mark (such as 0), the normal power-off is carried out; when the action flag position is the first flag (e.g. 1), the power-off is abnormal.
Optionally, obtaining the current opening degree of the electronic expansion valve of the electronic throttle assembly includes: when the last shutdown of the refrigeration system is determined to be a normal power-off shutdown, acquiring the normal power-off shutdown times of the refrigeration system; when the normal power-off shutdown frequency is equal to or more than the preset frequency, controlling the electronic expansion valve to reset, and taking the opening degree of the electronic expansion valve after resetting as the current opening degree; meanwhile, the normal power-off times of the refrigeration system are reset to zero. In this embodiment, the number of times of normal power-off and shutdown is obtained by counting by a counter. Specifically, after the refrigeration system is started to operate and the last shutdown of the refrigeration system is determined to be the normal power-off shutdown, the counter counts up to obtain the number of times of the normal power-off shutdown. The preset number of times is determined according to actual requirements, for example, the preset number of times is 5-10 times. The impact frequency can be effectively reduced, the original reset frequency can be reduced to 1/5-1/10, the reset impact is reduced, and the service life of the electronic expansion valve is prolonged.
In this embodiment, obtaining the current opening degree of the electronic expansion valve of the electronic throttling assembly further includes: and when the normal power-off and power-off times are smaller than the preset times, calling the current opening stored when the power is turned on last time.
S220, a target opening degree of the electronic expansion valve of the electronic throttle assembly corresponding to the target refrigerant flow rate is determined according to a correlation (abbreviated as a second correlation) between the opening degree of the electronic expansion valve and the refrigerant flow rate.
In step S220, the second correlation relationship is obtained by the aforementioned calibration method. Optionally, when the second relationship is an electronic expansion valve opening degree-refrigerant flow rate relationship curve, an opening degree of the target refrigerant flow rate on the relationship curve is the target opening degree. Optionally, when the second relationship is a tabulated relationship of the opening degree of the electronic expansion valve and the refrigerant flow, the target opening degree of the electronic expansion valve is obtained through piecewise linearization conversion according to a look-up table of the target refrigerant flow.
And S230, adjusting the opening degree of the electronic expansion valve to the target opening degree according to the current opening degree and the target opening degree of the electronic expansion valve.
According to the control method of the electronic throttling assembly, the current opening degree of the electronic expansion valve is used as a known parameter, after the refrigeration system is started to operate, the opening degree of the electronic expansion valve is directly adjusted to the target opening degree from the current opening degree, the operation that the electronic expansion valve is reset when the refrigeration system is started to operate in the conventional control is avoided, and the reset impact of the valve needle and the risk of valve needle clamping are reduced. And the determination of the correlation between the opening degree of the electronic expansion valve and the refrigerant flow solves the problem that different opening degree increments of the electronic expansion valve in the electronic throttling component correspond to different flow rate increments, so that the control is more stable.
In some embodiments, a method of controlling an electronic throttle assembly, further comprises: acquiring the actual refrigerant flow of the refrigeration system under the target opening; and when the difference value between the actual refrigerant flow and the target refrigerant flow is larger than the preset flow difference value, updating the refrigerant flow corresponding to the opening degree of the electronic expansion valve consistent with the target opening degree in the correlation between the opening degree of the electronic expansion valve and the refrigerant flow to be the actual refrigerant flow. In this embodiment, the second correlation is updated in real time according to the actual refrigerant flow of the refrigeration system during the actual operation process, so as to optimize the mapping relationship between the two, and make the control more stable. Here, the update may be a replacement update of the calibration refrigerant flow rate corresponding to the existing calibration opening in the second correlation, or may be an addition of a new calibration opening and the corresponding calibration refrigerant flow rate to the second correlation.
In some embodiments, as shown in fig. 4, the control method of the electronic throttle assembly of the embodiments of the present disclosure further includes:
and S310, acquiring the running time and the actual temperature after the opening degree of the electronic expansion valve is adjusted to the target opening degree.
After the electronic expansion valve is adjusted to the target opening degree, the refrigeration system starts to operate under the target opening degree, and the actual temperature is adjusted. At this point, the length of time the stage is operating is recorded and the actual temperature is obtained to check the effectiveness of the regulation.
And S320, when the operation time length is longer than a preset operation time length and the actual temperature does not reach the target temperature, determining the refrigerating capacity corresponding to the target opening degree as a reference according to the correlation between the opening degree of the electronic expansion valve and the refrigerating capacity, and taking the direction of the increase of the refrigerating capacity as a target adjusting direction of the opening degree of the electronic expansion valve.
In step S320, a preset operation duration is determined according to an actual requirement, and an application scenario that the actual temperature quickly reaches the standard is required, and the preset operation duration is, for example, 3min to 5 min; conversely, the preset operation time is long, for example, 5min to 10 min. And is not limited.
As can be known from the correlation between the opening degree of the electronic expansion valve and the startup operation time shown in fig. 6, as the opening degree of the electronic expansion valve increases, the cooling capacity increases first and then decreases, and therefore, the adjustment direction of the electronic expansion valve needs to be determined according to the section of the cooling capacity corresponding to the target opening degree, and the direction in which the cooling capacity increases is used as the target adjustment direction of the opening degree of the electronic expansion valve.
Alternatively, when the target opening degree is at the minimum opening degree X of the electronic expansion valve min To the optimum opening degree X effi In the middle, the target adjusting direction is to increase the opening of the electronic expansion valve; when the target opening degree is positioned at the optimal opening degree X of the electronic expansion valve effi To the maximum opening degree X max In between, the target adjustment direction is a direction that decreases the opening of the electronic expansion valve.
And S330, adjusting the opening of the electronic expansion valve according to the target adjusting direction and the preset stepping distance.
In step S330, the preset step interval is not limited, and may be determined according to an application scenario. Optionally, the preset step interval is 2-10 steps. Optionally, the preset step interval is 3-8 steps. Optionally, the preset step interval is 4-6 steps. Optionally, the preset step pitch is 5 steps.
According to the embodiment of the disclosure, the target adjusting direction of the opening degree of the electronic expansion valve is obtained according to the correlation between the opening degree of the electronic expansion valve and the refrigerating capacity, and the electronic expansion valve is finely adjusted to improve the refrigerating capacity and further improve the refrigerating effect. In addition, the invalid adjustment of the electronic expansion valve is reduced, and the service life of the electronic expansion valve is prolonged.
In some embodiments, a method of controlling an electronic throttle assembly, further comprises: after the opening degree of the electronic expansion valve is determined to be adjusted, updating the stored current opening degree into the adjusted opening degree of the electronic expansion valve; the adjusted opening degree of the electronic expansion valve is the current opening degree of the refrigeration system when the refrigeration system is started next time. In this embodiment, the adjusted opening degree of the electronic expansion valve may be a target opening degree during the current opening operation, or may be the opening degree of the electronic expansion valve after fine adjustment is performed again after the refrigeration capacity is determined to be insufficient. Namely, in the operation process of the refrigeration system, after the electronic expansion valve is adjusted, the stored current opening degree is updated to the adjusted opening degree of the electronic expansion valve, so that the accuracy of the adjusted current opening degree is ensured in the next starting operation, invalid adjustment operation is reduced, the adjustment efficiency is improved, and the service life of the electronic expansion valve is prolonged.
In some embodiments, a method of controlling an electronic throttle assembly, further comprises: after determining that the correlation between the opening degree of the electronic expansion valve and the refrigerating capacity is deviated, starting a calibration mode; the calibration mode adopts the calibration method of the electronic throttling component of any one of the embodiments; in the calibration method, the first temperature is higher than the target temperature, and the second temperature is lower than the target temperature. The calibration method of the electronic throttling assembly is combined into the control method, and during the actual operation of the refrigerating system, when the conditions are met, the calibration mode is started, and the calibration method is executed. Optionally, the calibration mode includes a process of performing the calibration method again in the calibration method of the aforementioned electronic throttle assembly.
In this embodiment, the maximum efficiency point of the refrigeration system corresponds to the maximum refrigeration capacity in the correlation between the opening degree of the electronic expansion valve and the refrigeration capacity, that is, in the second correlation, the optimum opening degree X corresponding to the shortest startup operation time is the optimum opening degree X effi . When the second correlation is deviated, the optimum opening X effi A change occurs, i.e., the point of maximum efficiency of the refrigerant system shifts. In this case, if control is performed based on the correlation at present, for example, a target adjustment direction of the opening degree of the electronic expansion valve is determined, which may cause a problem. Therefore, the electronic throttling assembly needs to be recalibrated to obtain a more accurate second correlation and first correlation.
In this embodiment, reference is made to the calibration method of the electronic throttling assembly in any one of the foregoing embodiments, which is not repeated herein.
As shown in fig. 5, an embodiment of the present disclosure provides an electronic device including a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to execute the calibration method of the electronic throttling component of the above embodiment; or to perform the control method of the electronic throttle assembly of the above embodiment.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure; and the correlation between the opening degree of the electronic expansion valve and the refrigerating capacity and the correlation between the opening degree of the electronic expansion valve and the refrigerant flow obtained by the calibration method. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, that is, implements the calibration method of the electronic throttling component in the above embodiments; or, a method of controlling an electronic throttling assembly.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory, for example, an EEPROM.
The embodiment of the disclosure provides a refrigeration system, which comprises the electronic equipment and the electronic throttling assembly of the embodiment.
The embodiment of the disclosure provides a computer-readable storage medium, which stores computer-executable instructions configured to execute the calibration method of the electronic throttling assembly; or, executing the control method of the electronic throttling assembly.
The embodiment of the present disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium, where the computer program includes program instructions, and when the program instructions are executed by a computer, the computer executes the calibration method of the electronic throttling assembly; or, executing the control method of the electronic throttling assembly.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses, and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (10)

1. An electronic throttle assembly, comprising:
an electronic expansion valve having a first port and a second port;
a first throttle capillary tube, a first port of which is connected in series with a first port of the electronic expansion valve;
the second throttling capillary tube is connected to the first port and the second port of the electronic expansion valve in parallel;
and a second port of the electronic expansion valve and a second port of the first throttling capillary tube are respectively connected to a pipeline of the refrigeration system.
2. The calibration method of the electronic throttling assembly is characterized in that the electronic throttling assembly adopts the electronic throttling assembly as claimed in claim 1 and is connected into a refrigeration system; the calibration method comprises the following steps:
selecting a plurality of calibration opening degrees in the range from the minimum opening degree to the maximum opening degree of an electronic expansion valve of the electronic throttling assembly, and controlling the opening degrees of the electronic expansion valve to be opened to the plurality of calibration opening degrees in sequence; wherein, at each calibration opening, the following operations are executed: when the actual temperature reaches a first temperature, controlling the compressor to start running and starting timing; when the actual temperature reaches a second temperature, controlling the compressor to stop and obtaining the starting operation time length; wherein the first temperature is greater than the second temperature; meanwhile, the refrigerant flow under each calibrated opening degree is obtained;
obtaining the correlation between the opening degree of the electronic expansion valve and the refrigerating capacity according to the starting operation duration corresponding to each of the plurality of calibration opening degrees;
and obtaining the correlation between the opening degree of the electronic expansion valve and the refrigerant flow according to the refrigerant flow corresponding to each of the plurality of calibrated opening degrees.
3. The calibration method according to claim 2, wherein a plurality of calibration opening degrees are selected, and the opening degree of the electronic expansion valve is controlled to be opened to the plurality of calibration opening degrees in sequence; the method comprises the following steps:
determining an initial opening degree in a range from a minimum opening degree to a maximum opening degree of an electronic expansion valve of the electronic throttling assembly;
selecting a plurality of first calibration opening degrees between the initial opening degree and the maximum opening degree, and controlling the opening degrees of the electronic expansion valve to be opened to the plurality of first calibration opening degrees in sequence in an increasing trend;
and selecting a plurality of second calibration opening degrees between the initial opening degree and the minimum opening degree, and controlling the opening degrees of the electronic expansion valve to be opened to the plurality of second calibration opening degrees in a descending trend.
4. The calibration method according to claim 3, further comprising:
acquiring an ith starting-up operation time length corresponding to the ith first calibration opening; wherein i is more than 1 and less than or equal to m, i is a positive integer, and m is the number of the first calibration opening degrees;
when the ith starting-up operation time length is longer than a first set operation time length, determining the starting-up operation time lengths corresponding to the ith first calibration opening and a first calibration opening larger than the ith first calibration opening as the first set operation time length;
acquiring the p-th starting-up operation time length corresponding to the p-th second calibration opening degree; wherein p is more than 1 and less than or equal to n, p is a positive integer, and n is the number of the second calibration opening degrees;
and when the p-th starting operation time length is longer than a second set operation time length, determining the starting operation time lengths corresponding to the p-th second calibration opening and a second calibration opening larger than the p-th second calibration opening as the second set operation time length.
5. The calibration method according to any one of claims 2 to 4, further comprising:
acquiring the actual refrigerant flow and the actual opening degree of the electronic expansion valve in the operation process of the refrigeration system;
determining the calibrated refrigerant flow corresponding to the actual opening degree according to the correlation between the opening degree of the electronic expansion valve and the refrigerant flow;
and when the difference value between the actual refrigerant flow and the calibrated refrigerant flow is larger than a preset flow difference value, updating the calibrated refrigerant flow to the actual refrigerant flow.
6. The calibration method according to any one of claims 2 to 4, further comprising:
and after determining that the correlation between the opening degree of the electronic expansion valve and the refrigerating capacity is deviated, executing the calibration method again.
7. The calibration method according to claim 6, further comprising, after determining that the correlation between the opening degree of the electronic expansion valve and the cooling capacity is biased:
acquiring a weather temperature parameter;
determining the time period within which the variation amplitude of the weather temperature parameter is within a set range according to the weather temperature parameter;
when the period is entered, the calibration method is executed again.
8. The calibration method according to claim 6, further comprising, during the re-execution of the calibration method:
when the starting operation duration corresponding to each of the plurality of adjacent calibration opening degrees fluctuates, stopping and exiting the calibration method; and the calibration method is not executed in the starting operation process of the refrigerating system.
9. An electronic device comprising a processor and a memory storing program instructions, wherein the processor is configured to execute the method of calibrating an electronic throttle assembly of any one of claims 2 to 8 when executing the program instructions.
10. A refrigeration system, comprising:
the electronic throttle assembly of claim 1; and the combination of (a) and (b),
the electronic device of claim 9.
CN202110192437.XA 2021-02-20 2021-02-20 Electronic throttling assembly, calibration method, electronic equipment and refrigeration system Pending CN114963619A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115574495A (en) * 2022-11-18 2023-01-06 江苏拓米洛环境试验设备有限公司 Capillary tube calibration device system and method for variable working condition and variable flow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115574495A (en) * 2022-11-18 2023-01-06 江苏拓米洛环境试验设备有限公司 Capillary tube calibration device system and method for variable working condition and variable flow

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