CN113932374B - Method and device for freezing prevention control of air conditioner, air conditioner and storage medium - Google Patents

Method and device for freezing prevention control of air conditioner, air conditioner and storage medium Download PDF

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Publication number
CN113932374B
CN113932374B CN202111146237.7A CN202111146237A CN113932374B CN 113932374 B CN113932374 B CN 113932374B CN 202111146237 A CN202111146237 A CN 202111146237A CN 113932374 B CN113932374 B CN 113932374B
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Prior art keywords
air conditioner
motor
current value
value
current
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CN113932374A (en
Inventor
李华刚
马玉奇
李辉增
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Priority to CN202111146237.7A priority Critical patent/CN113932374B/en
Publication of CN113932374A publication Critical patent/CN113932374A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application relates to the technical field of air conditioners, and discloses a method and a device for freezing prevention control of an air conditioner, the air conditioner and a storage medium. The method comprises the following steps: acquiring a first air inlet temperature of an air conditioner in a refrigeration running state, and a first motor current value and a first motor rotating speed of an indoor unit; determining a first stored motor current value matched with the first air inlet temperature and the first motor rotating speed, and obtaining a first current difference value between the first stored motor current value and the first motor current value; and under the condition that the first current difference value is larger than a first set value, controlling the air conditioner to perform anti-freezing protection operation. Therefore, the anti-freezing protection of the air conditioner according to the current value of the motor is realized, and the reliability and the efficiency of the anti-freezing protection are improved.

Description

Method and device for freezing prevention control of air conditioner, air conditioner and storage medium
Technical Field
The present application relates to the field of air conditioning technology, and for example, to a method and apparatus for controlling freezing prevention of an air conditioner, and a storage medium.
Background
When the air conditioner operates in a refrigeration mode, the air conditioner needs to be subjected to anti-freezing protection, at present, the temperature of a coil is detected through a coil sensor, and whether an anti-freezing protection program needs to be started or not is determined by judging the temperature of the coil, however, if the problems of detection failure of the sensor or unreasonable coil position setting exist, the actual temperature of the coil is very low, the detection temperature detected through the coil temperature sensor is relatively high, the anti-freezing protection can not be performed all the time, and further, the problem that the freezing effect of an air conditioner is poor for a user can occur, and the air conditioner is possibly damaged.
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, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a method and a device for controlling freezing prevention of an air conditioner, the air conditioner and a storage medium, so as to solve the technical problem that the detected coil temperature is too high to enter freezing prevention protection.
In some embodiments, the method comprises:
acquiring a first air inlet temperature of an air conditioner in a refrigeration running state, and a first motor current value and a first motor rotating speed of an indoor unit;
determining a first stored motor current value matched with the first air inlet temperature and the first motor rotating speed, and obtaining a first current difference value between the first stored motor current value and the first motor current value;
and under the condition that the first current difference value is larger than a first set value, controlling the air conditioner to perform anti-freezing protection operation.
In some embodiments, the apparatus for freeze prevention control of an air conditioner includes:
a cooling acquisition module configured to acquire a first intake air temperature of the air conditioner in a cooling operation state, and a first current value and a first motor rotation speed of the indoor unit;
a refrigeration determining module configured to determine a first stored motor current value that matches the first intake air temperature and the first motor speed, and to obtain a first current difference between the first stored motor current value and the first motor current value;
and the first control module is configured to control the air conditioner to perform anti-freezing protection operation under the condition that the first current difference value is larger than a first set value.
In some embodiments, the apparatus for air conditioner anti-freeze control comprises a processor and a memory storing program instructions, the processor being configured to perform the above-described method for air conditioner anti-freeze control when executing the program instructions.
In some embodiments, the air conditioner comprises the device for controlling freezing prevention of the air conditioner.
In some embodiments, the storage medium stores program instructions that, when executed, perform the above-described method for freeze prevention control of an air conditioner
The method, the device, the air conditioner and the storage medium for freezing prevention control of the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
under the conditions of the same air inlet temperature and the same motor rotating speed, when the first current difference value between the first stored motor current value of the indoor unit in the stored starting state and the first motor current value of the indoor unit in the refrigerating operation is larger than a set value, the air conditioner can be determined to be required to be protected against freezing, so that the situation that the coil pipe temperature sensor cannot normally prevent freezing when reporting errors or faults occur or the coil pipe position is improper is effectively prevented, the cost is reduced, and the production efficiency is improved.
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 and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
fig. 1 is a schematic flow chart of a method for controlling freezing prevention of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of a method for controlling freezing prevention of an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart of a method for controlling freezing prevention of an air conditioner according to an embodiment of the present disclosure;
fig. 4 is a schematic structural view of an anti-freezing control device for an air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic structural view of an anti-freezing control device for an air conditioner according to an embodiment of the present disclosure;
fig. 6 is a schematic structural view of an anti-freezing control device for an air conditioner according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. 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 still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" 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 indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
In the embodiment of the disclosure, when the air conditioner is in refrigeration operation, the judgment of the anti-freezing protection of the air conditioner can be performed according to the collected motor current value of the indoor unit, so that the judgment of the anti-freezing protection of the air conditioner can be performed without or without completely depending on the temperature value collected by the coil temperature collecting device, the situation that the coil temperature collecting device cannot normally prevent the anti-freezing protection when in failure is effectively prevented, the situation that the coil cannot normally prevent the anti-freezing protection when the coil position is improper is also effectively prevented, the reliability and the efficiency of the anti-freezing protection of the air conditioner are improved, the use safety of air conditioner devices is ensured, and the service life of the air conditioner is also prolonged.
Fig. 1 is a schematic flow chart of a method for controlling freezing prevention of an air conditioner according to an embodiment of the present disclosure. As shown in fig. 1, the process of controlling freezing prevention of the air conditioner includes:
step 101: the method comprises the steps of obtaining a first air inlet temperature of an air conditioner in a refrigeration running state, and a first motor current value and a first motor rotating speed of an indoor unit.
In the embodiment of the disclosure, when the air conditioner is operated in a refrigeration mode, namely the air conditioner is in a refrigeration operation state, the air inlet temperature of the air conditioner, the motor current value of the indoor unit and the motor rotating speed can be collected in real time or at regular time. The first air inlet temperature of the air conditioner, the first motor current value of the indoor unit and the first motor rotating speed can be obtained after each acquisition.
Wherein, the motor rotation speed may be related to wind speed, in some embodiments, if the air conditioner corresponds to a gear wind speed, for example: resisting wind speed, middle-grade wind speed and high-grade wind speed, each grade wind speed can correspond to one motor rotating speed. Thus, the corresponding first motor rotating speed can be obtained by checking the wind speed gear of the air conditioner. Of course, the temperature collection device near the air inlet of the air conditioner can be used for example: and the temperature sensor acquires a corresponding first air inlet temperature. And the corresponding first motor current value can be obtained through power detection or current detection and the like.
Step 102: and determining a first current value of the storage motor, which is matched with the first air inlet temperature and the first motor rotating speed, and obtaining a first current difference value between the first current value of the storage motor and the first motor current value.
In the embodiment of the disclosure, the stored motor current values corresponding to the air inlet temperature and the motor rotation speed respectively can be stored in the air conditioner in advance. Generally, when the air conditioner leaves the factory, the motor current value of the indoor unit of the air conditioner in a starting state is collected for one air conditioner of the same type or for each air conditioner under the conditions of different air inlet temperatures and different motor rotating speeds, and the corresponding relation among the air inlet temperatures, the motor rotating speeds and the stored motor current values is stored according to the collected motor current values, wherein only the indoor unit in the starting state is in an opening state.
For example: under the condition that only the indoor unit is started, under the conditions of different air inlet temperatures and different motor rotating speeds, collecting the motor current value of the indoor unit of an air conditioner of a certain model, then determining the collected motor current value as a stored motor current value, and generating and storing the corresponding relation among the air inlet temperature, the motor rotating speed and the stored motor current value. Therefore, for the air conditioner of the same model, the corresponding relation among the collected air inlet temperature, the motor rotating speed and the stored motor current value can be directly input into and written into the storage medium, so that the air conditioner can store the corresponding relation among the air inlet temperature, the motor rotating speed and the stored motor current value. Or, the corresponding relation among the air inlet temperature, the motor rotating speed and the stored motor current value which are configured and generated by other air conditioners of the same model are obtained through a network communication mode, and are stored.
Therefore, the air conditioner can save the corresponding relation among the air inlet temperature, the motor rotating speed and the saved motor current value according to the collected motor current value. Or, the air conditioner can acquire and store the corresponding relation among the air inlet temperature, the motor rotating speed and the stored motor current value through an input interface, network communication and other modes.
Therefore, the first stored motor current value matched with the first air inlet temperature and the first motor rotating speed can be determined according to the corresponding relation among the stored air inlet temperature, the motor rotating speed and the stored motor current value.
Acquiring a first air inlet temperature T 1 First motor current value I 1 And a first motor rotational speed P 1 After that, the processing unit is configured to,the first air inlet temperature T can be determined according to the corresponding relation among the stored air inlet temperature, the motor rotating speed and the stored motor current value 1 First motor rotational speed P 1 Matched first storage motor current value T b1 . Thereby, a first current difference DeltaI between the first stored motor current value and the first motor current value can be obtained 1 I.e. DeltaI 1＝ T b1 -I 1 。
Step 103: and under the condition that the first current difference value is larger than a first set value, controlling the air conditioner to perform anti-freezing protection operation.
The first set point may be 0.6A, 0.8A, 1.0A, 1.2A, etc., when ΔI 1 When the current value is larger than the first set value, the collected current value of the first motor is smaller and exceeds a certain range, at the moment, frosting possibly occurs on the coil or is about to occur, and at the moment, the air conditioner needs to be controlled to perform anti-freezing protection operation.
Therefore, in this embodiment, under the condition of the same air inlet temperature and the same motor rotation speed, when the first current difference value between the first stored motor current value of the indoor unit in the stored start state and the first motor current value of the indoor unit in the air conditioner during refrigeration operation is greater than the set value, it can be determined that the air conditioner needs to be protected against freezing, so that the protection against freezing of the air conditioner can be performed independently or incompletely depending on the temperature value acquired by the coil temperature acquisition device, the situation that the protection against freezing cannot be normally performed when the coil temperature acquisition device fails is effectively prevented, the accuracy and efficiency of the protection against freezing of the air conditioner are improved, and the use safety of an air conditioner device is ensured. Of course, the cost is reduced, and the production efficiency is improved.
When the air conditioner is installed, the specific installation position of the coil pipe also affects the motor current of the indoor unit, therefore, in some embodiments, each time the air conditioner is started and used, the corresponding motor current can be collected and compared with the stored motor current to obtain an installation position correction value, so that the anti-freezing control of the air conditioner can be performed according to the first current difference value and the installation position correction value during the refrigeration operation, and therefore, the control of the air conditioner to perform the anti-freezing protection operation further comprises: acquiring the current starting air inlet temperature of the air conditioner in the current starting state, and the current value of the current starting current and the rotating speed of the current starting motor of the indoor unit; determining a start-up save motor current value corresponding to the current start-up air inlet temperature and the current start-up motor rotation speed, and determining a difference value between the start-up save motor current value and the current start-up motor current value as a mounting position correction value; and controlling the air conditioner to perform anti-freezing protection operation under the condition that the correction difference value between the first current difference value and the installation position correction value is larger than the second set value.
When the air conditioner is started each time, the inner fan is started first, namely the air conditioner is in a starting state. At this time, the current starting air inlet temperature T is obtained q Current value I of current start-up of indoor unit q Current starting motor speed P q At this time, according to the stored motor current value, the corresponding relation among the air inlet temperature, the motor rotating speed and the stored motor current value can be stored, and the relation with T can be determined q And P q Respectively corresponding start-up and save motor current value I bq And the difference between the current value of the starting and storing motor and the current value of the current starting motor can be obtained, namely the installation position correction value delta I x Wherein DeltaI x＝ T bq -I q 。
It can be seen that, under the same condition of the start-up state, the same air inlet temperature and the same motor rotation speed, the obtained motor current difference value can be determined as the corresponding correction value of the air conditioner installation position, namely the installation position correction value, so that under the condition that the air conditioner is in the refrigeration state to obtain the first current difference value DeltaI, the first current difference value DeltaI can be obtained 1 And the correction value delta I of the installation position x Corrected difference Δic= Δi between 1 -△I x ＝(T b1 -I 1 )-(T bq -I q )。
The second set value may be 0.3A, 0.4A, 0.5A, or 0.6A, etc., when Δic is greater than the second set value, it indicates that the first motor current value still cannot be within the set range after the position correction is performed, at this time, there may be frosting or about to be frosting on the coil, and at this time, it is necessary to control the air conditioner to perform the anti-freezing protection operation.
Therefore, in this embodiment, after the position installation error is eliminated, the first current difference between the first current value of the first storage motor of the indoor unit and the first current value of the first motor of the indoor unit of the air conditioner during the refrigeration operation is still relatively large, so that the air conditioner needs to be protected from freezing, and the air conditioner can be protected from freezing independently or incompletely depending on the temperature value acquired by the coil temperature acquisition device, so that the situation that the coil temperature acquisition device cannot be protected from freezing normally when in failure is effectively prevented, the position installation error is eliminated, the situation that the coil cannot be protected from freezing normally when in unsuitable position is also effectively prevented, the accuracy and the efficiency of the air conditioner freezing protection are improved, the use safety of an air conditioner device is ensured, and the service life of the air conditioner is also prolonged.
In some embodiments, the air conditioning arrangement may include a coil temperature acquisition device, such as a coil temperature sensor, and operate the anti-freeze protection control based on the coil temperature acquired by the coil temperature acquisition device, if ΔI 1 When the temperature of the air conditioner is larger than the first set value or delta Ic is larger than the second set value, the air conditioner still does not operate anti-freezing protection according to the temperature of the coil, and the air conditioner is indicated to have the problems that a sensor detects faults or the position of the coil is unreasonably arranged.
In the embodiment of the present disclosure, when the anti-freezing protection of the air conditioner is determined according to the current value of the motor, that is, the air conditioner is in the anti-freezing protection operating state, the fault processing of the air conditioner is performed according to the current value, that is, the method further includes: acquiring a second air inlet temperature of the air conditioner in an anti-freezing protection running state, and a second motor current value and a second motor rotating speed of the indoor unit; determining a second stored current value matched with the second air inlet temperature and the second motor rotating speed, and obtaining a second current difference value between the second stored current value and the second motor current value; and under the condition that the second current difference value is smaller than the first current difference value, performing coil temperature position detection fault alarm processing.
Wherein, when the air conditioner is in an anti-freezing state, the second air inlet temperature T is obtained in real time or at regular time 2 Second current value I 2 And a second electricityEngine speed P 2 Then, the second air inlet temperature T can be determined according to the corresponding relation among the stored air inlet temperature, the motor rotating speed and the stored motor current value 2 Second motor rotational speed P 2 Matched second save motor current value T b2 . Thereby, a second current difference DeltaI between the second stored motor current value and the second motor current value can be obtained 2 I.e. DeltaI 2＝ T b2 -I 2 。
And, if DeltaI 2 ＜△I 1 The air conditioner is required to be protected against freezing, and the air conditioner also has the problems that a sensor detects faults or the position of a coil is unreasonable to be set. At this time, fault alarm can be performed by caption, voice, light, etc., and in some embodiments, relevant fault information of the fault detection of the coil temperature position can also be sent to a user terminal or an after-sales terminal communicating with the air conditioner to perform fault alarm processing of the coil temperature position detection. Therefore, users, after-sales personnel and the like can timely know the fault information of the air conditioner, maintain the air conditioner, ensure the normal use of the air conditioner and prolong the service life of the air conditioner.
The following integrates the operation flow into a specific embodiment, and illustrates the anti-freezing control process for the air conditioner provided by the embodiment of the application.
In an embodiment of the disclosure, when the air conditioner leaves the factory, the motor current values of the indoor unit of the air conditioner in a starting state are collected under the conditions of different air inlet temperatures and different motor rotating speeds, and the corresponding relation among the air inlet temperatures, the motor rotating speeds and the stored motor current values is generated and stored according to the collected motor current values. The first set point is 0.8A.
Fig. 2 is a schematic flow chart of a method for controlling freezing prevention of a user air conditioner according to an embodiment of the present disclosure. As shown in fig. 2, the process of controlling freezing prevention of the air conditioner includes:
step 201: acquiring a first air inlet temperature T of an air conditioner in a refrigeration running state 1 And a first motor current value I of the indoor unit 1 And a first motor rotational speed P 1 。
Step 202: according to the stored air inlet temperature, the motor rotatesCorresponding relation between speed and stored motor current value, determining first air inlet temperature T 1 First motor rotational speed P 1 Matched first storage motor current value I b1 。
Step 203: obtaining a first holding current value I b1 And a first current value I 1 A first current difference DeltaI therebetween 1 。
Step 204: judging delta I 1 Is > 0.8A? If yes, go to step 205, otherwise, return to step 201.
Step 205: and controlling the air conditioner to perform anti-freezing protection operation.
Therefore, in this embodiment, when the first current difference between the first stored motor current value of the indoor unit in the stored start state and the first motor current value of the indoor unit in the air conditioner during refrigeration operation is greater than the set value, it can be determined that the air conditioner needs to be protected from freezing, so that the situation that the coil temperature sensor fails to normally prevent from freezing when reporting errors or faults occur or the coil position is inappropriate is effectively prevented, meanwhile, the cost is reduced, and the production efficiency is improved.
In an embodiment of the disclosure, the air conditioner may acquire and store, via the internet, a correspondence between an intake air temperature, a motor rotation speed, and a stored current value of the same type of air conditioner. The second set point is 0.5A.
Fig. 3 is a schematic flow chart of a method for controlling freezing prevention of an air conditioner according to an embodiment of the present disclosure. Referring to fig. 3, the process for freeze prevention control of an air conditioner includes:
step 301: when the air conditioner is started, only the indoor unit is in a starting state, the current starting air inlet temperature Tq and the current starting current value I of the indoor unit are obtained q And the current starting motor speed P q 。
Step 302: determining the current starting air inlet temperature Tq and the current starting motor rotating speed P according to the corresponding relation among the stored air inlet temperature, the motor rotating speed and the stored motor current value q Corresponding start-up saving motor current value I bq 。
Step 303: will start to save the current value I of the motor bq And the current value I of the current starting current q The difference between them is determined as the mounting position correction value DeltaI x 。
Step 304: and controlling the air conditioner to perform refrigeration operation.
Step 305: acquiring a first air inlet temperature T of an air conditioner in a refrigeration running state 1 And a first motor current value I of the indoor unit 1 And a first motor rotational speed P 1 。
Step 306: determining a first air inlet temperature T according to the corresponding relation among the stored air inlet temperature, the motor rotating speed and the stored motor current value 1 First motor rotational speed P 1 Matched first storage motor current value I b1 。
Step 307: obtaining a first holding current value I b1 And a first current value I 1 A first current difference DeltaI therebetween 1 。
Step 308: judgment (DeltaI) 1 -△I x )>0.5A? If yes, go to step 309, otherwise, return to step 305.
Step 309: and controlling the air conditioner to perform anti-freezing protection operation.
Step 310: acquiring a second air inlet temperature T of the air conditioner in an anti-freezing protection running state 2 And a second motor current value I of the indoor unit 2 And a second motor rotational speed P 2 。
Step 311: determining a second air inlet temperature T according to the corresponding relation among the stored air inlet temperature, the motor rotating speed and the stored motor current value 2 Second motor rotational speed P 2 Matched second save motor current value I b2 。
Step 312: obtaining a second holding current value I b2 And a second current value I 2 A second current difference DeltaI therebetween 2 。
Step 313: judging delta I 2 <△I 1 ? If yes, go to step 314, otherwise, the current flow ends.
Step 314: and performing fault alarm processing for coil temperature position detection.
Therefore, in this embodiment, the freezing prevention protection control can be performed according to the corrected motor current value of the installation position, the freezing prevention protection of the air conditioner can be performed without or without completely depending on the temperature value collected by the coil temperature collecting device, the situation that the coil temperature collecting device cannot normally prevent freezing protection when faults occur is effectively prevented, the position installation error is eliminated, the situation that the coil cannot normally prevent freezing protection when the position is improper is also effectively prevented, the accuracy and the efficiency of the freezing prevention protection of the air conditioner are improved, the use safety of an air conditioner device is guaranteed, and the service life of the air conditioner is also prolonged.
According to the above-described process for freeze prevention control of an air conditioner, a device for freeze prevention control of an air conditioner can be constructed.
Fig. 4 is a schematic structural view of an anti-freezing control device for an air conditioner according to an embodiment of the present disclosure. As shown in fig. 4, the freezing prevention control device for an air conditioner includes: a refrigeration acquisition module 410, a refrigeration determination module 420, and a first control module 430.
The cooling acquisition module 410 is configured to acquire a first intake air temperature of the air conditioner in a cooling operation state, and a first current value and a first motor rotation speed of the indoor unit.
The refrigeration determination module 420 is configured to determine a first stored motor current value that matches the first intake air temperature and the first motor speed and to obtain a first current difference between the first stored motor current value and the first motor current value.
The first control module 430 is configured to control the air conditioner to perform anti-freezing protection operation if the first current difference value is greater than a first set value.
In some embodiments, further comprising: the collecting and storing module is configured to collect the motor current value of the indoor unit of the air conditioner in a starting state under the conditions of different air inlet temperatures and different motor rotating speeds, wherein only the indoor unit is in an opening state in the starting state; and storing the corresponding relation among the air inlet temperature, the motor rotating speed and the stored motor current value according to the collected motor current value.
In some embodiments, further comprising:
the starting acquisition module is configured to acquire the current starting air inlet temperature of the air conditioner in the current starting state, and the current value and the current rotating speed of the starting motor of the indoor unit.
The starting determining module is configured to determine a starting saving motor current value corresponding to the current starting air inlet temperature and the current starting motor rotating speed, and determine a difference value between the starting saving motor current value and the current starting motor current value as a mounting position correction value.
And the second control module is configured to control the air conditioner to perform anti-freezing protection operation under the condition that the correction difference value between the first current difference value and the installation position correction value is larger than a second set value.
In some embodiments, further comprising:
the anti-freezing acquisition module is configured to acquire a second air inlet temperature of the air conditioner in an anti-freezing protection operation state, and a second motor current value and a second motor rotating speed of the indoor unit.
The anti-freezing determining module is configured to determine a second stored motor current value matched with the second air inlet temperature and the second motor speed and obtain a second current difference between the second stored motor current value and the second motor current value.
And the fault repairing module is configured to perform coil temperature detection fault alarm processing under the condition that the second current difference value is smaller than the first current difference value.
The following illustrates an apparatus for freeze prevention control of an air conditioner according to an embodiment of the present application.
Fig. 5 is a schematic structural view of an anti-freezing control device for an air conditioner according to an embodiment of the present disclosure. As shown in fig. 5, the freezing prevention control device for an air conditioner includes: the refrigeration acquisition module 410, the refrigeration determination module 420, and the first control module 430 may further include: the acquisition and preservation module 440, the start acquisition module 450, the start determination module 460, the second control module 470, the anti-freeze acquisition module 480, the anti-freeze determination module 490, and the fault repair module 4100.
When the air conditioner leaves the factory, the collection and storage module 440 can collect the current value of the motor of the indoor unit of the air conditioner in the starting state under the conditions of different air inlet temperatures and different motor rotating speeds, and according to the collected current value of the motor, the corresponding relation among the air inlet temperatures, the motor rotating speeds and the stored current value of the motor is generated and stored.
Thus, when the air conditioner is started and only the indoor unit is started, the start acquiring module 450 may acquire the current start air inlet temperature of the air conditioner in a start state, and the current start current value and the current start motor rotation speed of the indoor unit, and the start determining module 460 may determine the start save motor current value corresponding to the current start air inlet temperature and the current start motor rotation speed according to the corresponding relationship between the air inlet temperature, the motor rotation speed and the save motor current value saved by the acquisition saving module 440, and determine the difference between the start save motor current value and the current start motor current value as the installation position correction value.
Thus, when the air conditioner is in the cooling operation, the cooling acquisition module 410 may acquire the first intake air temperature of the air conditioner, and the first motor current value and the first motor rotation speed of the indoor unit. The refrigeration determining module 420 may also determine a first stored motor current value that matches the first air intake temperature and the first motor speed according to the corresponding relationship between the air intake temperature, the motor speed, and the stored motor current value stored by the collecting and storing module 440, and obtain a first current difference between the first stored motor current value and the first motor current value.
Thus, the second control module 470 controls the air conditioner to perform the anti-freezing protection operation in case that the corrected difference between the first current difference and the installation position corrected value is greater than the second set value.
Of course, after the air conditioner performs the anti-freezing protection operation, the anti-freezing obtaining module 480 may obtain the second air inlet temperature of the air conditioner, and the second motor current value and the second motor rotation speed of the indoor unit; the anti-freezing determining module 490 may also determine a second stored motor current value that matches the second air intake temperature and the second motor speed according to the correspondence between the air intake temperature, the motor speed, and the stored motor current value stored by the collecting and storing module 440, and obtain a second current difference between the second stored motor current value and the second motor current value. Thus, in the event that the second current difference is less than the first current difference, the fault notification module 4100 performs a coil temperature position detection fault alarm process.
Therefore, in this embodiment, the device for controlling freezing prevention of the air conditioner can correct the post-motor current value according to the installation position, perform freezing prevention protection control, and perform freezing prevention protection of the air conditioner without depending on or not completely depending on the temperature value collected by the coil temperature collecting device, so that the situation that normal freezing prevention protection cannot be performed when the coil temperature collecting device fails is effectively prevented, in addition, the position installation error is eliminated, the situation that normal freezing prevention protection cannot be performed when the coil position is improper is also effectively prevented, the accuracy and the efficiency of freezing prevention protection of the air conditioner are improved, the use safety of air conditioner devices is ensured, and the service life of the air conditioner is also prolonged.
An embodiment of the present disclosure provides an apparatus for freezing prevention control of an air conditioner, having a structure as shown in fig. 6, including:
a processor (processor) 1000 and a memory (memory) 1001, and may also include a communication interface (Communication Interface) 1002 and a bus 1003. The processor 1000, the communication interface 1002, and the memory 1001 may communicate with each other via the bus 1003. The communication interface 1002 may be used for information transfer. The processor 1000 may call logic instructions in the memory 1001 to perform the method for freeze prevention control of an air conditioner of the above-described embodiment.
Further, the logic instructions in the memory 1001 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 1001 is used as a computer readable storage medium for storing a software program and a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 1000 performs functional applications as well as data processing by running program instructions/modules stored in the memory 1001, i.e. implements the method for freeze prevention control of an air conditioner in the above-described method embodiment.
The memory 1001 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the terminal device, etc. In addition, the memory 1001 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides an anti-freezing control device for an air conditioner, comprising: the air conditioner comprises a processor and a memory storing program instructions, wherein the processor is configured to execute an anti-freezing control method for the air conditioner when executing the program instructions.
The embodiment of the disclosure provides an air conditioner, which comprises the anti-freezing control device for the air conditioner.
The disclosed embodiments provide a storage medium storing program instructions that, when executed, perform a method for air conditioner anti-freeze control as described above.
The disclosed embodiments provide a computer program product comprising a computer program stored on a storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the above-described method for air conditioner anti-freeze control.
The storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only 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. The scope of the embodiments of the present disclosure encompasses the full ambit of the claims, as well as all available equivalents of the claims. When used in the present application, although the terms "first," "second," etc. may be used in the present application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without changing the meaning of the description, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first element and the second element are both elements, but may not be the same element. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (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 disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, 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 one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will 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 depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts 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 that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (9)

1. A method for freeze prevention control of an air conditioner, comprising:
acquiring a first air inlet temperature of an air conditioner in a refrigeration running state, and a first motor current value and a first motor rotating speed of an indoor unit;
determining a first stored motor current value matched with the first air inlet temperature and the first motor rotating speed, and obtaining a first current difference value between the first stored motor current value and the first motor current value;
controlling the air conditioner to perform anti-freezing protection operation under the condition that the first current difference value is larger than a first set value;
acquiring a second air inlet temperature of the air conditioner in an anti-freezing protection running state, and a second motor current value and a second motor rotating speed of the indoor unit;
determining a second stored motor current value matched with the second air inlet temperature and the second motor rotating speed, and obtaining a second current difference value between the second stored motor current value and the second motor current value;
and under the condition that the second current difference value is smaller than the first current difference value, performing coil temperature position detection fault alarm processing.
2. The method of claim 1, wherein the step of obtaining the first intake air temperature of the air conditioner in the cooling operation state, and the first motor current value and the first motor rotation speed of the indoor unit, further comprises:
under the conditions of different air inlet temperatures and different motor rotating speeds, collecting the motor current values of the indoor unit of the air conditioner in a starting state, wherein only the indoor unit is in an opening state in the starting state;
and storing the corresponding relation among the air inlet temperature, the motor rotating speed and the stored motor current value according to the acquired motor current value.
3. The method of claim 2, wherein the controlling the air conditioner to perform anti-freeze protection operation further comprises:
acquiring the current starting air inlet temperature of the air conditioner in a starting state, and the current value and the current rotating speed of a starting motor of the current starting current value and the current rotating speed of the current starting motor of the indoor unit;
determining a start-up saving motor current value corresponding to the current start-up air inlet temperature and the current start-up motor rotating speed, and determining a difference value between the start-up saving motor current value and the current start-up motor current value as a mounting position correction value;
and controlling the air conditioner to perform anti-freezing protection operation under the condition that the correction difference value between the first current difference value and the installation position correction value is larger than a second set value.
4. An apparatus for freeze prevention control of an air conditioner, comprising:
a cooling acquisition module configured to acquire a first intake air temperature of the air conditioner in a cooling operation state, and a first current value and a first motor rotation speed of the indoor unit;
a refrigeration determining module configured to determine a first stored motor current value that matches the first intake air temperature and the first motor speed, and to obtain a first current difference between the first stored motor current value and the first motor current value;
the first control module is configured to control the air conditioner to perform anti-freezing protection operation under the condition that the first current difference value is larger than a first set value;
the anti-freezing acquisition module is configured to acquire a second air inlet temperature of the air conditioner in an anti-freezing protection running state, and a second motor current value and a second motor rotating speed of the indoor unit;
an anti-freeze determination module configured to determine a second stored motor current value that matches the second intake air temperature and the second motor speed, and to obtain a second current difference between the second stored motor current value and the second motor current value;
and the fault repairing module is configured to perform coil temperature detection fault alarm processing under the condition that the second current difference value is smaller than the first current difference value.
5. The apparatus as recited in claim 4, further comprising:
the collecting and storing module is configured to collect motor current values of the indoor unit of the air conditioner in a starting state under the conditions of different air inlet temperatures and different motor rotating speeds, wherein only the indoor unit is in an opening state in the starting state; and storing the corresponding relation among the air inlet temperature, the motor rotating speed and the stored motor current value according to the acquired motor current value.
6. The apparatus as recited in claim 5, further comprising:
the starting acquisition module is configured to acquire the current starting air inlet temperature of the air conditioner in the current starting state, and the current value and the current rotating speed of the starting motor of the indoor unit;
a start-up determining module configured to determine a start-up save current value corresponding to the current start-up intake air temperature and a current start-up motor rotational speed, and to determine a difference between the start-up save current value and the current start-up current value as a mounting position correction value;
and the second control module is configured to control the air conditioner to perform anti-freezing protection operation under the condition that the corrected difference value between the first current difference value and the installation position corrected value is larger than a second set value.
7. An apparatus for air conditioner anti-freeze control, the apparatus comprising a processor and a memory storing program instructions, wherein the processor is configured, when executing the program instructions, to perform the method for air conditioner anti-freeze control of any one of claims 1 to 3.
8. An air conditioner, comprising: apparatus for freeze prevention control of an air conditioner as claimed in claim 4 or 7.
9. A storage medium storing program instructions which, when executed, perform a method for freeze prevention control of an air conditioner as claimed in any one of claims 1 to 3.
CN202111146237.7A 2021-09-28 2021-09-28 Method and device for freezing prevention control of air conditioner, air conditioner and storage medium Active CN113932374B (en)

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CN108317669B (en) * 2018-02-14 2020-08-25 青岛海尔空调器有限总公司 Anti-freezing control method for indoor unit of air conditioner
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CN111189184B (en) * 2018-11-14 2021-12-21 青岛海尔空调器有限总公司 Air conditioner and anti-freezing control method thereof
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CN112254290B (en) * 2020-09-18 2021-10-29 青岛海尔空调器有限总公司 Method and device for controlling air conditioner fan and air conditioner

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