CN113587354A - Control method and device for low-voltage protection in heating mode of air conditioner and air conditioner - Google Patents

Control method and device for low-voltage protection in heating mode of air conditioner and air conditioner Download PDF

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Publication number
CN113587354A
CN113587354A CN202110938304.2A CN202110938304A CN113587354A CN 113587354 A CN113587354 A CN 113587354A CN 202110938304 A CN202110938304 A CN 202110938304A CN 113587354 A CN113587354 A CN 113587354A
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China
Prior art keywords
low
air conditioner
preset duration
actual
preset
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CN202110938304.2A
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Chinese (zh)
Inventor
赵攀
汪云强
刘赛兰
李博涛
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
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Application filed by Ningbo Aux Electric Co Ltd, Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd filed Critical Ningbo Aux Electric Co Ltd
Priority to CN202110938304.2A priority Critical patent/CN113587354A/en
Publication of CN113587354A publication Critical patent/CN113587354A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • 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
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • 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
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure

Abstract

The embodiment of the invention provides a control method and device for low-voltage protection of an air conditioner in a heating mode and the air conditioner, and belongs to the technical field of air conditioners. The control method comprises the step of obtaining the outdoor environment temperature and the actual low-pressure value of the air conditioner. And determining the preset duration time for reaching the low-voltage protection according to the outdoor environment temperature, wherein the preset duration time represents that the low-voltage pressure value of the air conditioner reaches the duration time threshold value of the low-voltage protection. And if the actual low-pressure value reaches the actual duration of the low-pressure protection and is equal to the preset duration, controlling the air conditioner to perform the low-pressure protection. The air conditioner is controlled to perform low-voltage protection by the actual duration time when the outdoor environment temperature, the actual low-voltage pressure value and the actual low-voltage pressure value of the air conditioner reach the low-voltage protection, so that the control of the low-voltage protection is more accurate, the air conditioner can be prevented from frequently performing low-voltage protection in a short time, and the comfort and the service life of heating of the air conditioner are improved.

Description

Control method and device for low-voltage protection in heating mode of air conditioner and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device for low-voltage protection in a heating mode of an air conditioner and the air conditioner.
Background
The existing air conditioner generally has a low-pressure protection function in order to improve the running reliability of the air conditioner in a heating mode, a target pressure is set through a pressure sensor or a pressure switch for judgment, and when the low pressure is too low and the risk of liquid return exists, the reliability of the use of an air conditioning system is ensured through the shutdown of a compressor. However, in some scenes, such as low-temperature heating, temperature rise and temperature drop, the air conditioner may be suddenly pulled down by low voltage in a short time, which causes the air conditioner to frequently perform low-voltage protection and release the low-voltage protection in a short time, thereby affecting the service life of the air conditioner.
Disclosure of Invention
The invention solves the problem of how to avoid the frequent start and stop of the air conditioner due to low-voltage protection in a short time.
In order to solve the above problems, embodiments of the present invention provide a control method and a control device for low voltage protection in a heating mode of an air conditioner, and an air conditioner. The air conditioner can be prevented from being started and stopped frequently due to low-voltage protection in a short time.
In a first aspect, the present invention provides a method for controlling low-voltage protection in a heating mode of an air conditioner, which is applied to the air conditioner, and the method comprises:
acquiring an outdoor environment temperature and an actual low-pressure value of the air conditioner;
determining a preset duration time for achieving low-voltage protection according to the outdoor environment temperature, wherein the preset duration time represents that the low-voltage pressure value of the air conditioner reaches a duration time threshold value of the low-voltage protection;
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the preset duration, controlling the air conditioner to perform low-pressure protection.
Because different outdoor environment temperatures have great influence on the state of a refrigerant of the air conditioner and the pressure of a system, the control method for low-pressure protection in the heating mode of the air conditioner provided by the embodiment of the invention can control the air conditioner to perform low-pressure protection according to the outdoor environment temperature where the air conditioner is located, the actual low-pressure value and the actual duration time when the actual low-pressure value reaches the low-pressure protection, so that the preset duration time is determined by using the outdoor environment where the air conditioner is located, and the control of the low-pressure protection is more accurate. When the actual duration that the actual low pressure value of air conditioner reached low pressure protection equals to the time of predetermineeing, control air conditioner carries out low pressure protection, can avoid the air conditioner in the short time because transient system low pressure, triggers the frequent low pressure protection that carries on of air conditioner, improves the travelling comfort that heats and the life of air conditioner.
In an alternative embodiment, the preset duration comprises a first preset duration;
the step of determining the preset duration of reaching low-voltage protection according to the outdoor environment temperature comprises:
if the outdoor environment temperature is greater than a first preset outdoor environment temperature, determining the preset duration as a first preset duration;
if the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the preset duration time, the step of controlling the air conditioner to perform the low-pressure protection comprises the following steps:
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the first preset duration, controlling the air conditioner to perform low-pressure protection.
The preset duration is determined by comparing the outdoor environment temperature with the first preset outdoor environment temperature, so that the correlation between the preset duration and the outdoor environment temperature is stronger, and the control of low-voltage protection is more accurate.
In an optional embodiment, the preset duration further includes a second preset duration, and the second preset duration is less than the first preset duration;
the step of determining the preset duration of reaching low-voltage protection according to the outdoor environment temperature comprises:
if the outdoor environment temperature is less than or equal to the first preset outdoor environment temperature and greater than a second preset outdoor environment temperature, determining the preset duration as a second preset duration;
if the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the preset duration time, the step of controlling the air conditioner to perform the low-pressure protection comprises the following steps:
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the second preset duration, controlling the air conditioner to perform low-pressure protection.
The preset duration time corresponding to the real-time outdoor environment temperature is determined by comparing the outdoor environment temperature with the first preset outdoor environment temperature and the second preset environment temperature, so that the corresponding more accurate continuous preset time under different outdoor environment temperatures is ensured, the correlation between the preset duration time and the outdoor environment temperature is stronger, and the control of low-voltage protection is more accurate. Meanwhile, the lower the outdoor environment temperature is, the lower the low pressure of the air conditioner system is, so that the probability of low-pressure protection of the air conditioner is increased under the condition that the air conditioner system generates low pressure, the second preset duration is shorter than the first preset duration, the delay protection time of the air conditioner under the low-pressure condition is shortened, and the possibility of false alarm of the low-pressure protection in a short time can be reduced on the basis of ensuring the use reliability of the air conditioner.
In an alternative embodiment, the preset duration comprises a third preset duration, the third preset duration being less than the second preset duration;
the step of determining the preset duration of reaching low-voltage protection according to the outdoor environment temperature comprises:
if the outdoor environment temperature is less than or equal to the second preset outdoor environment temperature and greater than a third preset outdoor environment temperature, determining the preset duration as a third preset duration;
if the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the preset duration time, the step of controlling the air conditioner to perform the low-pressure protection comprises the following steps:
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the third preset duration, controlling the air conditioner to perform low-pressure protection.
The preset duration time corresponding to the real-time outdoor environment temperature is determined by comparing the outdoor environment temperature with the first preset outdoor environment temperature, the second preset environment temperature and the third preset environment temperature, so that the corresponding more accurate preset duration time under different outdoor environment temperatures is ensured, the correlation between the preset duration time and the outdoor environment temperature is stronger, and the control of low-voltage protection is more accurate. Meanwhile, the lower the outdoor environment temperature is, the lower the low pressure of the air conditioner system is, so that the probability of low-pressure protection of the air conditioner is increased under the condition that the air conditioner system generates low pressure, the third preset duration is shorter than the second preset duration, the delay protection time of the air conditioner under the low-pressure condition is shortened, and the possibility of false alarm of low-pressure protection in a short time is reduced on the basis of ensuring the use reliability of the air conditioner.
In an alternative embodiment, the preset duration further comprises a fourth preset duration; the fourth preset duration is less than the third preset duration;
the step of determining the preset duration of reaching low-voltage protection according to the outdoor environment temperature comprises:
if the outdoor environment temperature is less than or equal to the third preset outdoor environment temperature, determining the preset duration as a fourth preset duration;
if the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the preset duration time, the step of controlling the air conditioner to perform the low-pressure protection comprises the following steps:
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the fourth preset duration, controlling the air conditioner to perform low-pressure protection.
The preset duration time corresponding to the real-time outdoor environment temperature is determined by comparing the outdoor environment temperature with the first preset outdoor environment temperature, the second preset environment temperature and the third preset environment temperature, so that the corresponding more accurate preset duration time under different outdoor environment temperatures is ensured, the correlation between the preset duration time and the outdoor environment temperature is stronger, and the control of low-voltage protection is more accurate. Meanwhile, the lower the outdoor environment temperature is, the lower the low pressure of the air conditioner system is, so that the probability of low-pressure protection of the air conditioner is increased under the condition that the air conditioner system generates low pressure, the fourth preset duration is shorter than the third preset duration, the delay protection time of the air conditioner under the low-pressure condition is shortened, and the possibility of false alarm of low-pressure protection in a short time is reduced on the basis of ensuring the use reliability of the air conditioner.
In an alternative embodiment, the third preset outdoor ambient temperature is 0 ℃ and the fourth preset duration is 0 s.
Because when the outdoor ambient temperature that the air conditioner was located is less than or equal to 0 ℃, generally can make the condenser self of air conditioner frost very fast, lead to the heat transfer variation, let the low pressure of air conditioner be close to predetermines the low pressure value, and predetermine the duration with the fourth and be 0s for the low pressure protection of air conditioner does not have the delay, thereby has guaranteed the reliability that the air conditioner used under low temperature environment.
In an alternative embodiment, the preset duration is t, and the preset duration t satisfies the following relation:
the preset duration time t is set within the range that t is more than or equal to 0s and less than or equal to 120s, so that the compressor can be prevented from being in a low-pressure state for a long time.
In a second aspect, the present invention provides a control device for low voltage protection in a heating mode of an air conditioner, which is applied to the air conditioner, and comprises:
an acquisition unit for acquiring an outdoor ambient temperature and an actual low-pressure value of the air conditioner;
the determining unit is used for determining the preset duration time for achieving low-voltage protection according to the outdoor environment temperature;
and the control unit is used for controlling the air conditioner to perform low-pressure protection when the actual duration time when the actual low-pressure value reaches the low-pressure protection value is equal to the preset duration time.
Because different outdoor environment temperature have very big influence to the state of air conditioner refrigerant, the pressure of system, the controlling means of low pressure protection under the air conditioner heating mode that this application embodiment provided can control the air conditioner according to the outdoor environment temperature that the air conditioner located, actual low pressure value reach the actual duration of low pressure protection and carry out the low pressure protection to utilize the outdoor environment of air conditioner located to confirm to predetermine the duration, let the control of low pressure protection more accurate. When the actual duration that the actual low pressure value of air conditioner reached low pressure protection equals to the time of predetermineeing, control air conditioner carries out low pressure protection, can avoid the air conditioner in the short time because transient system low pressure, triggers the frequent low pressure protection that carries on of air conditioner, improves the travelling comfort that heats and the life of air conditioner.
In an alternative embodiment, the preset duration comprises a first preset duration;
the determining unit is further used for determining the preset duration as a first preset duration when the outdoor environment temperature is greater than a first preset outdoor environment temperature;
the control unit is also used for controlling the air conditioner to carry out low-pressure protection when the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the first preset duration time.
The control device of low pressure protection under air conditioner heating mode that this application embodiment provided confirms the preset duration that real-time outdoor ambient temperature corresponds through predetermineeing outdoor ambient temperature and first preset outdoor ambient temperature and the second with outdoor ambient temperature and predetermine ambient temperature and compare, lets the more accurate correspondence of outdoor ambient temperature under the difference last the preset duration, lets preset duration and outdoor ambient temperature correlation stronger for low pressure protection's control is more accurate. Meanwhile, the lower the outdoor environment temperature is, the lower the low pressure of the air conditioner system is, so that the probability of low-pressure protection of the air conditioner is increased under the condition that the air conditioner system generates low pressure, the second preset duration is shorter than the first preset duration, the time for delaying protection of the air conditioner under the condition of low pressure is shortened, and the possibility of false alarm of low-pressure protection in a short time is reduced on the basis of ensuring the use reliability of the air conditioner.
In a third aspect, the present invention provides an air conditioner, comprising a controller, wherein the controller is configured to execute computer instructions to implement the method for controlling low voltage protection in a heating mode of the air conditioner according to any one of the foregoing embodiments.
Because different outdoor environment temperature has very big influence to the state of air conditioner refrigerant, the pressure of system, the air conditioner that this application embodiment provided can be based on the outdoor environment temperature that the air conditioner located, the actual duration that the actual low pressure value reached low pressure protection controls the air conditioner and carries out low pressure protection, because different outdoor environment temperature has very big influence to the state of air conditioner refrigerant, the pressure of system, thereby utilize the outdoor environment that the air conditioner located to confirm to predetermine the duration, let low pressure protection's control more accurate. When the actual duration that the actual low pressure value of air conditioner reached low pressure protection equals to the time of predetermineeing, control air conditioner carries out low pressure protection, can avoid the air conditioner in the short time because transient system low pressure, triggers the frequent low pressure protection that carries on of air conditioner, improves the travelling comfort that heats and the life of air conditioner.
Drawings
Fig. 1 is a schematic flowchart of a control method for low-voltage protection in a heating mode of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of substep S210 of step S200 of FIG. 1;
FIG. 3 is a schematic flow chart of substep S220 of step S200 of FIG. 1;
FIG. 4 is a schematic flow chart of substep S230 of step S200 of FIG. 1;
FIG. 5 is a schematic flow chart of substep S240 of step S200 of FIG. 1;
fig. 6 is a block diagram of a control device for low-voltage protection in a heating mode of an air conditioner according to an embodiment of the present invention.
Description of reference numerals:
100-a control device for low-voltage protection in a heating mode of the air conditioner; 110-an obtaining unit; 130-a determination unit; 150-control unit.
Detailed Description
The existing air conditioner generally has a low-pressure protection function in order to improve the running reliability of the air conditioner in a heating mode, a target pressure is set through a pressure sensor or a pressure switch for judgment, and when the low pressure is too low and the risk of liquid return exists, the reliability of the use of an air conditioning system is ensured through the shutdown of a compressor. However, in some scenes, such as low-temperature heating, temperature rise and temperature drop, the air conditioner may be suddenly pulled down by low voltage in a short time, which causes the air conditioner to frequently perform low-voltage protection and release the low-voltage protection in a short time, thereby affecting the service life of the air conditioner.
In order to solve the above technical problems, embodiments of the present invention provide a control method, a control device and an air conditioner for low voltage protection in a heating mode of an air conditioner, which can prevent the air conditioner from triggering the air conditioner to perform frequent low voltage protection due to a short system low voltage in a short time, thereby improving the comfort of heating and the service life of the air conditioner.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The embodiment of the invention provides a control method and a control device for low-voltage protection in a heating mode of an air conditioner, which are applied to the air conditioner.
The controller may be an integrated circuit chip having signal processing capabilities. The controller may be a general-purpose processor, and may include a Central Processing Unit (CPU), a single chip Microcomputer (MCU), a Micro Controller Unit (MCU), a Complex Programmable Logic Device (CPLD), a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an embedded ARM, and other chips, where the controller may implement or execute each method, step, and Logic block disclosed in the embodiments of the present invention.
In a possible implementation manner, the air conditioner may further include a memory for storing program instructions executable by the controller, for example, the control device for low voltage protection in the heating mode of the air conditioner provided by the embodiment of the present application includes at least one control device that may be stored in the memory in the form of software or firmware. The Memory may be a stand-alone external Memory including, but not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Read-Only Memory (EPROM), electrically Erasable Read-Only Memory (EEPROM). The memory may also be integrated with the controller, for example, the memory may be integrated with the controller on the same chip.
In this embodiment, the air conditioner further includes a low pressure sensor disposed on a suction pipe of a compressor of the outdoor unit, and the low pressure sensor is configured to detect an actual low pressure of suction air of the compressor.
In this embodiment, the air conditioner further includes an outdoor ambient temperature sensor. The outdoor environment temperature sensor is used for detecting the outdoor environment temperature of the air conditioner.
Referring to fig. 1, based on the air conditioner, the control method for low voltage protection in the heating mode of the air conditioner provided in this embodiment is used to control the air conditioner to perform low voltage protection. The control method for low-voltage protection in the heating mode of the air conditioner can comprise the following steps:
and step S100, acquiring the outdoor environment temperature and the actual low-pressure value of the air conditioner.
In this embodiment, the outdoor ambient temperature is detected by a temperature sensor, and the actual low pressure value is detected by a low pressure sensor.
And step S200, determining the preset duration time for achieving low-voltage protection according to the outdoor environment temperature.
It should be noted that the preset duration represents that the low-pressure value of the air conditioner reaches the duration threshold of the low-pressure protection. The low-pressure protection is achieved by the fact that the actual low-pressure value of the air conditioner is lower than the preset low-pressure value. The preset low pressure value is a target value which is drawn up according to different types of air conditioners and can be controlled. The preset duration is set according to actual needs of outdoor ambient temperature, type of air conditioner, and the like.
In the present embodiment, the preset duration is t. The preset duration t satisfies the following relation:
0s≤t≤120s。
the preset duration time t is set within the range that t is more than or equal to 0s and less than or equal to 120s, so that the condition that the compressor of the air conditioner is in a low-pressure running state for a long time can be avoided, and the service life of the air conditioner is influenced.
And step S300, judging whether the actual duration time when the actual low-pressure value reaches the low-pressure protection value is equal to the preset duration time or not.
In this embodiment, the actual duration time when the actual low-pressure value reaches the low-pressure protection represents the operation duration time when the actual low-pressure value of the air conditioner is continuously lower than the preset low-pressure value, and when the actual low-pressure value of the air conditioner is lower than the preset low-pressure value, timing is started, and the actual duration time is considered to be the actual duration time in the period when the actual low-pressure value is lower than the preset low-pressure value.
And step S400, if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the preset duration, controlling the air conditioner to perform low-pressure protection.
It should be noted that, as the actual duration time gradually increases, a situation may occur in which the actual duration time is equal to the preset duration time, and when this occurs, the air conditioner is controlled to be turned off for low-voltage protection. The low voltage protection may be performed by controlling a compressor of the air conditioner to stop operating.
And a substep S500, if the actual duration time of the actual low-pressure value reaching the low-pressure protection is not equal to the preset duration time, the air conditioner normally operates.
It should be noted that, along with the change of the duration and the actual low-pressure, the actual low-pressure value is restored to the normal pressure value when the actual duration is less than the preset duration, and when the actual duration is less than the preset duration, the air conditioner is controlled to normally operate. The normal operation of the air conditioner means that the air conditioner continues to operate according to the original operation mode.
Because different outdoor environment temperature has very big influence to the state of air conditioner refrigerant, the pressure of system, outdoor environment temperature, actual low pressure value, the actual duration that actual low pressure value reached low pressure protection when this embodiment was operated through the air conditioner control the air conditioner and carry out the low pressure protection to the duration is predetermine in the outdoor environment determination that utilizes the air conditioner to locate, makes the control of low pressure protection more accurate. When the actual duration that the actual low pressure value of air conditioner reached low pressure protection equals to the time of predetermineeing, control air conditioner carries out low pressure protection, can avoid the air conditioner in the short time because transient system low pressure, triggers the frequent low pressure protection that carries on of air conditioner, improves the travelling comfort that heats and the life of air conditioner.
In this embodiment, step S200 includes: and judging the preset temperature range of the outdoor environment temperature. And determining the preset duration time corresponding to the preset temperature range according to the different preset temperature ranges. Wherein the preset duration becomes shorter as the outdoor ambient temperature decreases.
As shown in fig. 2, in the present embodiment, the preset duration includes a first preset duration. Step S200 includes the following sub-step S210. The substep S210 comprises the following substeps 211-212.
And a substep S211 of determining whether the outdoor ambient temperature is greater than a first preset outdoor ambient temperature.
The first preset ambient temperature is set correspondingly according to the type of the air conditioner.
In the sub-step S212, if the outdoor ambient temperature is greater than the first preset outdoor ambient temperature, the preset duration is determined to be the first preset duration.
The first preset duration is correspondingly set according to the first preset ambient temperature and the type of the air conditioner.
In this embodiment, the first preset outdoor ambient temperature is 15 ℃. The first preset duration is 120 s. It should be noted that the first preset outdoor environment temperature is determined according to parameters such as the type of the air conditioner, and may be adaptively set and adjusted according to different types of air conditioners. The first preset duration is determined according to parameters such as the type of the air conditioner, and the like, and can be adaptively set and adjusted according to different types of the air conditioner.
In some other embodiments of the present application, optionally, the first preset ambient temperature is TY1. First predetermined ambient temperature TY1The following relation is satisfied:
12℃≤TY1≤18℃。
in some further embodiments of the present application, optionally, the first preset duration is tY1. First preset duration tY1The following relation is satisfied:
100s≤tY1≤120s。
with reference to fig. 2, in the present embodiment, the sub-step S300 includes a sub-step S301.
And a substep S301 of judging whether the actual duration of the actual low pressure value reaching the low pressure protection is equal to a first preset duration.
If the actual duration of the low pressure protection is equal to the first preset duration when the actual low pressure value reaches the low pressure value, step S400 is executed.
If the actual duration of the actual low pressure value reaching the low pressure protection is not equal to the first preset duration, step S500 is executed.
This embodiment determines preset duration through comparing outdoor ambient temperature and first preset outdoor ambient temperature to let preset duration and outdoor ambient temperature correlation stronger, let the control of low pressure protection more accurate.
Referring to fig. 3, in the present embodiment, the preset duration includes a second preset duration, and the second preset duration is smaller than the first preset duration. Step S200 includes the following sub-step S220. The substep S220 comprises the following substeps S221-S222.
The substep S221 determines whether the outdoor ambient temperature is less than or equal to a first preset outdoor ambient temperature and greater than a second preset outdoor ambient temperature.
And the second preset ambient temperature is correspondingly set according to the type of the air conditioner.
In the sub-step S222, if the outdoor ambient temperature is less than or equal to the first preset outdoor ambient temperature and greater than the second preset outdoor ambient temperature, the preset duration is determined to be the second preset duration.
And the second preset duration is correspondingly set according to the first preset ambient temperature, the second preset ambient temperature and the type of the air conditioner.
In this embodiment, the second preset ambient temperature is 7 ℃. The second preset duration is 60 s.
In some other embodiments of the present application, optionally, the second preset ambient temperature is TY2. Second predetermined ambient temperature TY2The following relation is satisfied:
5℃≤TY1≤10℃。
in still other embodiments of the present application, optionally, the second preset durationIs tY2. Second preset duration tY2The following relation is satisfied:
50s≤tY2≤70s。
referring to fig. 3, in the present embodiment, the step S300 includes:
and a substep S302 of judging whether the actual duration of the actual low-pressure value reaching the low-pressure protection is equal to a second preset duration.
If the actual duration of the low pressure protection is equal to the second preset duration when the actual low pressure value reaches the low pressure value, step S400 is executed.
If the actual duration of the actual low pressure value reaching the low pressure protection is not equal to the second preset duration, step S500 is executed.
This implementation is through predetermineeing outdoor ambient temperature and first predetermine outdoor ambient temperature and the second and predetermine ambient temperature and compare the preset duration that confirms real-time outdoor ambient temperature corresponds, lets correspond more accurate duration preset time under the outdoor ambient temperature of difference, lets preset duration and outdoor ambient temperature correlation stronger for low pressure protection's control is more accurate. Meanwhile, the lower the outdoor environment temperature is, the lower the low pressure of the air conditioner is, so that the probability of low-pressure protection of the air conditioner is increased under the condition that the air conditioner generates low pressure, the second preset duration is shorter than the first preset duration, the time of delay protection of the air conditioner in a low-temperature operation environment is shortened, and the possibility of false alarm of low-pressure protection in a short time can be reduced on the basis of ensuring the use reliability of the air conditioner.
Referring to fig. 4, in the present embodiment, the preset duration includes a third preset duration, and the third preset duration is smaller than the second preset duration. Step S200 includes the following substep S230, substep S230 including:
the substep S231 determines whether the outdoor ambient temperature is less than or equal to the second preset outdoor ambient temperature and greater than the third preset outdoor ambient temperature.
And the third preset ambient temperature is correspondingly set according to the type of the air conditioner.
In the substep S232, if the outdoor ambient temperature is less than or equal to the second preset outdoor ambient temperature and greater than the third preset outdoor ambient temperature, the preset duration is determined to be a third preset duration.
And the third preset duration is correspondingly set according to the second preset ambient temperature, the third preset ambient temperature and the type of the air conditioner.
In this embodiment, the third preset ambient temperature is 0 ℃. The third preset duration is 30 s.
In some other embodiments of the present application, optionally, the third preset ambient temperature is TY3. Third preset ambient temperature TY3The following relation is satisfied:
0℃≤TY3≤3℃。
in some further embodiments of the present application, optionally, the third preset duration is tY3. Third preset duration tY3The following relation is satisfied:
20s≤tY3≤40s。
referring to fig. 4, in the present embodiment, the sub-step S300 includes:
and a substep S303 of judging whether the actual duration of the actual low pressure value reaching the low pressure protection is equal to a third preset duration.
If the actual duration of the actual low pressure value reaching the low pressure protection is equal to the third preset duration, step S400 is executed.
If the actual duration of the actual low pressure value reaching the low pressure protection is not equal to the third preset duration, step S500 is executed.
The preset duration that real-time outdoor ambient temperature corresponds is determined by comparing outdoor ambient temperature with the first preset outdoor ambient temperature, the second preset ambient temperature and the third preset ambient temperature in the embodiment, more accurate corresponding duration under different outdoor ambient temperatures is ensured, the correlation between the preset duration and the outdoor ambient temperature is stronger, and the control of low-voltage protection is more accurate. Meanwhile, the lower the outdoor environment temperature is, the lower the low pressure of the air conditioner system is, so that the probability of low-pressure protection of the air conditioner is increased under the condition that the low pressure occurs in the air conditioner system, the third preset duration is shorter than the second preset duration, the delay protection time of the air conditioner in a low-temperature operation environment is shortened, and the possibility of false alarm in the short time of low-pressure protection can be reduced on the basis of ensuring the use reliability of the air conditioner.
Referring to fig. 5, in the present embodiment, the preset duration includes a fourth preset duration, and the fourth preset duration is smaller than the third preset duration. Step S200 includes the following substep S240, substep S240 including:
and a substep S241 of determining whether the outdoor ambient temperature is less than or equal to a third preset outdoor ambient temperature, and determining the preset duration as a fourth preset duration.
In the sub-step S242, if the outdoor ambient temperature is less than or equal to the third preset outdoor ambient temperature, the preset duration is determined to be the fourth preset duration.
And the fourth preset duration is correspondingly set according to the third preset ambient temperature and the type of the air conditioner.
In the present embodiment, the fourth preset duration is 0 s. When the outdoor environment temperature that the air conditioner was located is less than or equal to 0 ℃, generally can make the condenser self of air conditioner frost very fast, lead to the heat transfer variation, let the low pressure of air conditioner be close to predetermines the low pressure value, make the probability increase of air conditioner low pressure operation, and predetermine the duration with the fourth for 0s for the low pressure protection of air conditioner does not have the delay, thereby has guaranteed the reliability that the air conditioner used under low temperature environment.
Referring to fig. 5, in the present embodiment, the step S300 includes:
and a substep S304 of determining whether the actual duration of time for the actual low pressure value to reach the low pressure protection is equal to a fourth preset duration.
If the actual duration of the low pressure protection is equal to the fourth preset duration when the actual low pressure value reaches the low pressure value, step S400 is executed.
If the actual duration of the actual low pressure value reaching the low pressure protection is not equal to the fourth preset duration, step S500 is executed.
The preset duration that real-time outdoor ambient temperature corresponds is determined by comparing outdoor ambient temperature with the first preset outdoor ambient temperature, the second preset ambient temperature and the third preset ambient temperature in the embodiment, more accurate corresponding duration under different outdoor ambient temperatures is ensured, the correlation between the preset duration and the outdoor ambient temperature is stronger, and the control of low-voltage protection is more accurate. Meanwhile, the lower the outdoor environment temperature is, the lower the low pressure of the air conditioner system is, so that the probability of low-pressure protection of the air conditioner is increased under the condition that the air conditioner system generates low pressure, the fourth preset duration is shorter than the third preset duration, the delay protection time of the air conditioner in a low-temperature operation environment is shortened, and the possibility of false alarm of low-pressure protection in a short time is reduced on the basis of ensuring the use reliability of the air conditioner.
Referring to fig. 6, in order to implement possible steps of the control method for low voltage protection in the heating mode of the air conditioner provided in the embodiments, an embodiment of the invention provides a control device 100 for low voltage protection in the heating mode of the air conditioner, which is applied to the air conditioner and is used to implement the control method for low voltage protection in the heating mode of the air conditioner. It should be noted that the basic principle and the generated technical effect of the control device 100 for low-voltage protection in the heating mode of the air conditioner provided by the embodiment of the present invention are substantially the same as those of the above embodiment, and for the sake of brief description, for parts not mentioned in this embodiment, reference may be made to the corresponding contents in the above embodiment.
The control device 100 for low voltage protection in the heating mode of the air conditioner includes an obtaining unit 110, a determining unit 130 and a control unit 150.
The acquisition unit 110 is used to acquire an outdoor ambient temperature and an actual low pressure value of the air conditioner.
Optionally, the obtaining unit 110 may be specifically configured to execute step S100 in each of the above-mentioned figures, so as to achieve a corresponding technical effect.
The determination unit 130 is configured to determine a preset duration of time for reaching the low voltage protection according to the outdoor ambient temperature.
Optionally, the determining unit 130 may be specifically configured to execute the step S200 and the sub-steps thereof in the above-mentioned figures, so as to achieve the corresponding technical effect.
The control unit 150 is configured to control the air conditioner to perform low-pressure protection when the actual low-pressure value reaches the actual duration of the low-pressure protection equal to the preset duration.
Optionally, the control unit 150 may be specifically configured to execute the step S300 and the sub-steps thereof in the above-mentioned figures, so as to achieve the corresponding technical effect.
In summary, the control method, the control device and the air conditioner for low-voltage protection in the heating mode of the air conditioner provided by the embodiment of the invention control the air conditioner to perform low-voltage protection based on the outdoor environment temperature where the air conditioner is located, the actual low-voltage pressure value and the actual duration time for the actual low-voltage pressure value to reach the low-voltage protection, so that the control of the low-voltage protection is more accurate. When the actual duration that the actual low pressure value of air conditioner reached low pressure protection equals to the time of predetermineeing, control air conditioner carries out low pressure protection, can avoid the air conditioner in the short time because transient system low pressure, triggers the frequent low pressure protection that carries on of air conditioner, improves the travelling comfort and the life that the air conditioner heated.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. 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). It should also be noted that, 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. It will also be noted that 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.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing 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 according to the embodiments of the present invention. And the aforementioned storage medium includes: 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.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A control method of low-voltage protection in a heating mode of an air conditioner is applied to the air conditioner and is characterized by comprising the following steps:
acquiring an outdoor environment temperature and an actual low-pressure value of the air conditioner;
determining a preset duration time for achieving low-voltage protection according to the outdoor environment temperature, wherein the preset duration time represents that the low-voltage pressure value of the air conditioner reaches a duration time threshold value of the low-voltage protection;
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the preset duration, controlling the air conditioner to perform low-pressure protection.
2. A control method for low voltage protection during heating mode of an air conditioner as claimed in claim 1, wherein said preset duration comprises a first preset duration;
the step of determining the preset duration of reaching low-voltage protection according to the outdoor environment temperature comprises:
if the outdoor environment temperature is greater than a first preset outdoor environment temperature, determining the preset duration as a first preset duration;
if the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the preset duration time, the step of controlling the air conditioner to perform the low-pressure protection comprises the following steps:
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the first preset duration, controlling the air conditioner to perform low-pressure protection.
3. The method as claimed in claim 2, wherein the preset duration further comprises a second preset duration, and the second preset duration is less than the first preset duration;
the step of determining the preset duration of reaching low-voltage protection according to the outdoor environment temperature comprises:
if the outdoor environment temperature is less than or equal to the first preset outdoor environment temperature and greater than a second preset outdoor environment temperature, determining the preset duration as a second preset duration;
if the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the preset duration time, the step of controlling the air conditioner to perform the low-pressure protection comprises the following steps:
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the second preset duration, controlling the air conditioner to perform low-pressure protection.
4. The method as claimed in claim 3, wherein the preset duration further includes a third preset duration, and the third preset duration is less than the second preset duration;
the step of determining the preset duration of reaching low-voltage protection according to the outdoor environment temperature comprises:
if the outdoor environment temperature is less than or equal to the second preset outdoor environment temperature and greater than a third preset outdoor environment temperature, determining the preset duration as a third preset duration;
if the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the preset duration time, the step of controlling the air conditioner to perform the low-pressure protection comprises the following steps:
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the third preset duration, controlling the air conditioner to perform low-pressure protection.
5. The method as claimed in claim 4, wherein the preset duration further includes a fourth preset duration; the fourth preset duration is less than the third preset duration;
the step of determining the preset duration of reaching low-voltage protection according to the outdoor environment temperature comprises:
if the outdoor environment temperature is less than or equal to the third preset outdoor environment temperature, determining the preset duration as a fourth preset duration;
if the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the preset duration time, the step of controlling the air conditioner to perform the low-pressure protection comprises the following steps:
and if the actual low-pressure value reaches the actual duration of low-pressure protection and is equal to the fourth preset duration, controlling the air conditioner to perform low-pressure protection.
6. The method as claimed in claim 5, wherein the third predetermined outdoor temperature is 0 ℃ and the fourth predetermined duration is 0 s.
7. The method as claimed in claim 1, wherein the preset duration is t, and the preset duration t satisfies the following relation: t is more than or equal to 0s and less than or equal to 120 s.
8. The utility model provides a controlling means of low pressure protection under air conditioner heating mode, is applied to the air conditioner which characterized in that, controlling means includes:
an acquisition unit for acquiring an outdoor ambient temperature and an actual low-pressure value of the air conditioner;
the determining unit is used for determining the preset duration time for achieving low-voltage protection according to the outdoor environment temperature; and the control unit is used for controlling the air conditioner to perform low-pressure protection when the actual duration time when the actual low-pressure value reaches the low-pressure protection value is equal to the preset duration time.
9. A control apparatus for low voltage protection during a heating mode of an air conditioner as claimed in claim 8, wherein said predetermined duration comprises a first predetermined duration;
the determining unit is further used for determining the preset duration as a first preset duration when the outdoor environment temperature is greater than a first preset outdoor environment temperature;
the control unit is also used for controlling the air conditioner to carry out low-pressure protection when the actual duration time when the actual low-pressure value reaches the low-pressure protection is equal to the first preset duration time.
10. An air conditioner, comprising a controller, wherein the controller is used for executing computer instructions to implement the control method of low voltage protection in heating mode of the air conditioner according to any one of claims 1 to 7.
CN202110938304.2A 2021-08-16 2021-08-16 Control method and device for low-voltage protection in heating mode of air conditioner and air conditioner Pending CN113587354A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737566A (en) * 2018-12-29 2019-05-10 青岛海尔空调电子有限公司 Air conditioner and its control method
CN111623472A (en) * 2020-05-09 2020-09-04 青岛海尔空调电子有限公司 Air conditioner and method for preventing low-voltage fault thereof
CN113007860A (en) * 2021-04-19 2021-06-22 宁波奥克斯电气股份有限公司 Low-voltage protection control method and device and air conditioner
CN113188236A (en) * 2021-05-11 2021-07-30 宁波奥克斯电气股份有限公司 Low-voltage control method and device for air conditioner and air conditioner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737566A (en) * 2018-12-29 2019-05-10 青岛海尔空调电子有限公司 Air conditioner and its control method
CN111623472A (en) * 2020-05-09 2020-09-04 青岛海尔空调电子有限公司 Air conditioner and method for preventing low-voltage fault thereof
CN113007860A (en) * 2021-04-19 2021-06-22 宁波奥克斯电气股份有限公司 Low-voltage protection control method and device and air conditioner
CN113188236A (en) * 2021-05-11 2021-07-30 宁波奥克斯电气股份有限公司 Low-voltage control method and device for air conditioner and air conditioner

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