CN113932371A - Air conditioner fluorine deficiency protection method and device and air conditioner - Google Patents
Air conditioner fluorine deficiency protection method and device and air conditioner Download PDFInfo
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- CN113932371A CN113932371A CN202111395354.7A CN202111395354A CN113932371A CN 113932371 A CN113932371 A CN 113932371A CN 202111395354 A CN202111395354 A CN 202111395354A CN 113932371 A CN113932371 A CN 113932371A
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—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
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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
- F24F11/62—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
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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
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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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
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention provides an air conditioner fluorine deficiency protection method and device and an air conditioner, and relates to the technical field of air conditioners. The air conditioner fluorine deficiency protection method comprises the following steps: an evaporator temperature value is received. An ambient temperature value is received. And calculating the difference value between the evaporator temperature value and the environment temperature value to obtain a temperature difference value. Acquiring a first preset temperature value and a second preset temperature value according to a plurality of temperature difference values calculated by an evaporator under various environmental temperature conditions; the first preset temperature value is greater than the second preset temperature value. And controlling the air conditioner to execute fluorine-lacking protection according to the first preset temperature value, the second preset temperature value and the temperature difference value. The air conditioner fluorine deficiency protection device and the air conditioner provided by the invention can execute the air conditioner fluorine deficiency protection method. The air conditioner fluorine deficiency protection method, the device and the air conditioner provided by the invention can solve the technical problem that the air conditioning effect of the air conditioner is influenced due to the lack of the fluorine deficiency protection method in the prior art.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fluorine deficiency protection method and device for an air conditioner and the air conditioner.
Background
Along with the gradual popularization of air conditioners, the competition among air conditioner manufacturing enterprises is more intense, and the importance of improving the quality of air conditioner products to improving the product competitiveness is gradually highlighted.
Most of heat pump type air conditioner products produced in China at present do not have a fluorine-lacking protection function, if fluorine-lacking protection is caused during the operation of an air conditioner, carbonization of a refrigerant and lubricating oil can be caused due to overhigh exhaust temperature and oil temperature, the viscosity of the lubricating oil can be reduced due to overhigh oil temperature, the lubricating effect is poor, and the mechanical abrasion of a compressor is aggravated; too high motor winding temperature can shorten the life-span of motor enameled wire insulating layer and even arouse the motor short circuit to burn out, then can lead to the air conditioner heating effect seriously to descend, and compressor exhaust, lubricating oil and driving motor winding temperature rise to the air conditioning effect of air conditioner has been influenced.
Disclosure of Invention
The invention solves the technical problem of how to improve the air conditioning effect of the air conditioner caused by the lack of a fluorine-lacking protection method in the prior art.
In order to solve the above problems, the present invention provides a fluorine deficiency protection method for an air conditioner, comprising:
receiving an evaporator temperature value representing a temperature at an inlet of an evaporator of an air conditioner;
receiving an ambient temperature value representing a temperature of an environment in which the evaporator is located;
calculating the difference value between the evaporator temperature value and the environment temperature value to obtain a temperature difference value;
acquiring a first preset temperature value and a second preset temperature value according to a plurality of temperature difference values calculated by the evaporator under various environmental temperature conditions; the first preset temperature value is greater than the second preset temperature value;
and controlling the air conditioner to execute fluorine-lacking protection according to the first preset temperature value, the second preset temperature value and the temperature difference value.
Compared with the prior art, the air conditioner fluorine deficiency protection method provided by the invention has the beneficial effects that:
in the condition of lacking fluorine in the air conditioner, the total amount of refrigerant circulating inside the air conditioner is reduced, and therefore, the pressure of the refrigerant inside the evaporator is reduced, and the temperature of the evaporator is reduced, so that the temperature difference between the temperature value of the evaporator and the ambient temperature value is increased. In addition, under the condition that the refrigerant in the air conditioner is completely leaked or the refrigerant in the air conditioner is nearly completely leaked, the liquid refrigerant is not in the evaporator any more, and the detected temperature value of the evaporator gradually approaches to the ambient temperature value, so that the closer the refrigerant is to be completely leaked, the smaller the calculated temperature difference value is. Based on this, whether lack fluorine protection carries out can be judged according to temperature difference, first preset temperature value and second preset temperature value, can provide effectual lack fluorine protection for the air conditioner, improve the technical problem that lack fluorine protection method and influence the air conditioning effect of air conditioner among the prior art.
In addition, the first preset temperature value and the second preset temperature value are obtained according to a plurality of temperature difference values obtained by the evaporator under different environmental temperature conditions, and the first preset temperature value and the second preset temperature value which are selected in this way are used as comparison references, so that the current amount of the refrigerant can be reflected more accurately, whether the refrigerant leaks or not can be accurately judged, and the control accuracy of the air-conditioner fluorine deficiency protection method is improved.
Optionally, before the step of receiving the evaporator temperature value, the air conditioner fluorine deficiency protection method further comprises:
acquiring an operation mode of the air conditioner;
if the operation mode of the air conditioner is a refrigeration mode or a dehumidification mode, marking an internal machine heat exchanger of the air conditioner as the evaporator;
and if the operation mode of the air conditioner is a heating mode, marking an external unit heat exchanger of the air conditioner as the evaporator.
Different heat exchangers can be marked as evaporators according to different operation modes of the air conditioner, so that the temperatures of the different heat exchangers can be detected under different operation conditions, and the air conditioner can be accurately and effectively controlled to perform fluorine-deficient protection by the air conditioner fluorine-deficient protection method.
Optionally, the step of obtaining a first preset temperature value and a second preset temperature value according to a plurality of temperature difference values calculated by the evaporator under a plurality of ambient temperature conditions includes:
obtaining a plurality of temperature difference values calculated by the evaporator under various environmental temperature conditions;
screening a maximum difference value and a minimum difference value in a plurality of temperature difference values;
calculating the first preset temperature value according to the maximum difference value;
and acquiring the second preset temperature value according to the minimum difference value.
The first preset temperature value is calculated according to the maximum value of the temperature difference values calculated by the evaporator under various environment temperature conditions, so that the first preset temperature value can reflect the actual amount of the refrigerant, and the accuracy of judging whether the refrigerant leaks is improved. In a similar way, the second preset temperature value is obtained according to the minimum value of the temperature difference values calculated by the evaporator under various environment temperature conditions, so that the second preset temperature value can reflect the amount of the refrigerant approaching to complete leakage, and the accuracy of judging whether the refrigerant leaks completely is improved.
To avoid false fluorine shortage, optionally, the step of calculating the first preset temperature value according to the maximum difference value includes:
and taking the sum of the maximum difference value and a preset value as the first preset temperature value, wherein the value range of the preset value is more than or equal to 1 ℃ and less than or equal to 30 ℃.
To avoid false fluorine shortage, optionally, the step of obtaining the second preset temperature value according to the minimum difference value includes:
and acquiring the second preset temperature value in an interval which is greater than 0 and smaller than the minimum difference value.
Optionally, if the air conditioner operates in a heating mode, the step of controlling the air conditioner to execute the fluorine-deficient protection according to the first preset temperature value, the second preset temperature value and the temperature difference value includes:
judging whether the temperature difference value is smaller than a second preset temperature value and lasts for a first preset time;
if yes, controlling the air conditioner to execute fluorine-lacking protection;
if not, controlling the air conditioner to execute fluorine-lacking protection according to the temperature difference value and the first preset temperature value.
Optionally, the step of controlling the air conditioner to perform the fluorine-deficient protection according to the temperature difference and the first preset temperature value includes:
judging whether the temperature difference value is greater than the first preset temperature value and lasts for a second preset time;
if yes, controlling the air conditioner to defrost;
after defrosting of the air conditioner is finished, the evaporator temperature value and the environment temperature value are obtained again to calculate the temperature difference value again;
judging whether the temperature difference obtained by recalculation is larger than the first preset temperature value and lasts for the second preset time;
and if so, controlling the air conditioner to execute fluorine-lacking protection.
Optionally, if the air conditioner operates in a cooling mode or a dehumidification mode, the step of controlling the air conditioner to execute fluorine deficiency protection according to the first preset temperature value, the second preset temperature value and the temperature difference value includes:
judging whether the temperature difference value is greater than the first preset temperature value and lasts for a third preset time;
if yes, controlling the air conditioner to execute fluorine-lacking protection;
if not, controlling the air conditioner to execute fluorine-lacking protection according to the temperature difference value and the second preset temperature value.
Optionally, the step of controlling the air conditioner to perform fluorine deficiency protection according to the temperature difference and the second preset temperature value includes:
judging whether the temperature difference value is smaller than the second preset temperature value and lasts for a fourth preset time;
and if so, controlling the air conditioner to execute fluorine-lacking protection.
The utility model provides an air conditioner lacks fluorine protection device, is applied to the air conditioner, air conditioner lacks fluorine protection device includes:
a first receiving module for receiving an evaporator temperature value representing a temperature at an inlet of an evaporator of an air conditioner;
a second receiving module, configured to receive an ambient temperature value, where the ambient temperature value represents a temperature of an environment in which the evaporator is located;
the calculation module is used for calculating the difference value between the evaporator temperature value and the environment temperature value to obtain a temperature difference value;
the acquisition module is used for acquiring a first preset temperature value and a second preset temperature value according to a plurality of temperature difference values calculated by the evaporator under various environmental temperature conditions; the first preset temperature value is greater than the second preset temperature value;
and the control module is used for controlling the air conditioner to execute fluorine-lacking protection according to the first preset temperature value, the second preset temperature value and the temperature difference value.
An air conditioner includes a temperature detection device and a controller; the temperature detection device is used for detecting an evaporator temperature value at an inlet of an evaporator of the air conditioner and is also used for detecting an environment temperature value of the environment where the evaporator is located; the temperature detection device is electrically connected with the controller so as to send the detected evaporator temperature value and the detected environment temperature value to the controller, and the controller is used for executing the air conditioner fluorine deficiency protection method.
Compared with the prior art, the beneficial effects of the air conditioner fluorine deficiency protection device and the air conditioner provided by the embodiment of the invention are the same as the beneficial effects of the air conditioner fluorine deficiency protection method provided by the invention, and the detailed description is omitted.
Drawings
Fig. 1 is a flowchart of a fluorine deficiency protection method for an air conditioner provided in an embodiment of the present application;
fig. 2 is a partial flowchart of a fluorine deficiency protection method for an air conditioner provided in an embodiment of the present application;
fig. 3 is a flowchart of step S40 in the air conditioner fluorine deficiency protection method provided in the embodiment of the present application;
fig. 4 is a flowchart of step S50 in the air conditioner fluorine deficiency protection method in case of the heating mode of the air conditioner provided in the embodiment of the present application;
fig. 5 is a flowchart of step S53 in the air conditioner fluorine deficiency protection method provided in the embodiment of the present application;
fig. 6 is a flowchart of step S50 of the air conditioner fluorine deficiency protection method in case of the air conditioner in the cooling mode or the dehumidification mode according to the embodiment of the present application;
fig. 7 is a flowchart of step S503 of the air conditioner fluorine deficiency protection method provided in the embodiment of the present application;
fig. 8 is a functional block schematic diagram of a fluorine deficiency protection device for an air conditioner provided in an embodiment of the present application.
Description of reference numerals:
10-a first receiving module; 20-a second receiving module; 30-a calculation module; 40-an acquisition module; 50-a control module.
Detailed Description
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 application provides an air conditioner, and the air conditioner comprises an air conditioner internal unit and an air conditioner external unit. The air conditioner indoor unit is configured to be installed in a designated area to provide air conditioning to the designated area, so that the air quality of the designated area is improved, and the comfort of users in the designated area is improved. The air conditioner external unit is configured to be installed in a region outside the designated region, and the air conditioner internal unit and the air conditioner external unit are connected, and a refrigerant may circulate between the air conditioner internal unit and the air conditioner external unit.
Generally, a compressor, an external machine heat exchanger and an expansion valve are arranged in an external machine of an air conditioner, and an internal machine heat exchanger is arranged in an internal machine of the air conditioner. The compressor, the outer machine heat exchanger, the expansion valve and the inner machine heat exchanger are connected through the four-way valve to form a circulation loop of the refrigerant. It should be noted that, when the operation mode of the air conditioner is a cooling mode, a dehumidification mode or a defrosting mode, the refrigerant flows through the external machine heat exchanger, the expansion valve and the internal machine heat exchanger in sequence under the action of the compressor, and then returns to the compressor, thereby forming the circulation of the refrigerant; in this case, the inner heat exchanger is regarded as an evaporator, and the outer heat exchanger is regarded as a condenser. Under the condition that the operation mode of the air conditioner is a heating mode, the refrigerant flows through the internal machine heat exchanger, the expansion valve and the external machine heat exchanger in sequence under the action of the compressor and then returns to the compressor, so that the circulation of the refrigerant is formed; in this case, the outer machine heat exchanger is regarded as an evaporator and the inner machine heat exchanger as a condenser.
In the prior art, because the air conditioner does not have a fluorine-lacking protection function, wherein fluorine represents a refrigerant in the air conditioner, the air conditioner cannot be protected in time under the condition of fluorine deficiency, the refrigerant and lubricating oil are carbonized due to overhigh exhaust temperature and oil temperature, the viscosity of the lubricating oil is reduced due to overhigh oil temperature, the lubricating effect is poor, and the mechanical wear of a compressor is aggravated; too high motor winding temperature can shorten the life-span of motor enameled wire insulating layer and even arouse the motor short circuit to burn out, then can lead to the air conditioner heating effect seriously to descend, and compressor exhaust, lubricating oil and driving motor winding temperature rise to the air conditioning effect of air conditioner has been influenced.
In order to improve the problems, in other words, to improve the technical problem that the air conditioning effect of the air conditioner is influenced due to the fact that the air conditioner in the prior art lacks of the fluorine-lacking protection method, the air conditioner of the application is provided.
In some embodiments of the present application, the air conditioner further includes a temperature detection device and a controller. The temperature detection device can be used for detecting the temperature at the inlet of the evaporator to obtain an evaporator temperature value; in addition, the temperature detection device can also be used for detecting the temperature of the environment where the evaporator is located so as to obtain an environment temperature value. In order to detect the temperature of the evaporator in different operation modes of the air conditioner, the temperature detecting device includes a first temperature sensor and a second temperature sensor. The first temperature sensor is arranged on the inner machine heat exchanger, so that the temperature of the inner machine heat exchanger can be detected under the conditions of a refrigeration mode, a dehumidification mode and a defrosting mode of the air conditioner, namely the temperature of the evaporator is detected; the second temperature sensor is installed at the outer machine heat exchanger so that the temperature of the outer machine heat exchanger, that is, the temperature of the evaporator can be detected in the case that the air conditioner operates in the heating mode. Of course, in order to detect the temperature of the environment in which the evaporator is located, the temperature detection device may further include a third temperature sensor and a fourth temperature sensor. The third temperature sensor is arranged in the environment where the indoor unit heat exchanger is located, for example, the third temperature sensor is installed on the indoor unit of the air conditioner and is used for detecting the temperature of the environment where the indoor unit heat exchanger is located, so that the temperature of the environment where the evaporator is located can be detected under the condition that the operation mode of the air conditioner is the cooling mode, the dehumidification mode and the defrosting mode. The fourth temperature sensor is disposed in an environment where the outer unit heat exchanger is located, for example, the third temperature sensor is mounted on the air conditioner outer unit and is used for detecting the temperature of the environment where the outer unit heat exchanger is located, so that the temperature of the environment where the evaporator is located can be detected when the operation mode of the air conditioner is the heating mode.
Wherein, temperature-detecting device is connected with the controller electricity to send the temperature signal who detects to the controller, the temperature signal that the controller just can receive temperature-detecting device and send. In other words, the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor are all electrically connected with the controller to send the detected evaporator temperature value and the ambient temperature value to the controller.
In addition, 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 the methods, steps, and Logic blocks 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 air conditioner control device provided in the embodiment of the present application, where the air conditioner control device provided in the embodiment of the present application includes at least one of the program instructions 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.
The controller can judge whether the air conditioner leaks the refrigerant according to the received evaporator temperature value and the received environment temperature value, and controls the air conditioner to execute fluorine-lacking protection under the condition that the judgment result is that the refrigerant leaks. The controller controls the air conditioner to perform fluorine-lack protection in a manner that the air conditioner is controlled to stop running and the condition that the air conditioner lacks fluorine is fed back to a user. Optionally, the way of feeding back the lack of fluorine condition of the air conditioner to the user may be: displaying the identifier lacking fluorine through a display device; alarming by a buzzer to remind a user; and sending the fluorine lack condition to an intelligent terminal of a user through a WiFi module.
Based on the air conditioner provided above, the embodiment of the application further provides a fluorine-deficient protection method for the air conditioner, so as to solve the technical problem that the air conditioning effect of the air conditioner is affected due to the lack of the fluorine-deficient protection method in the prior art.
In some embodiments of the present application, referring to fig. 1, a method for protecting an air conditioner from fluorine deficiency includes:
and step S10, receiving the evaporator temperature value.
Wherein the evaporator temperature value represents a temperature at an inlet of an evaporator of the air conditioner. Of course, the air conditioner is started for a certain time before the evaporator temperature value is received, so that the temperature of the evaporator tends to be stable, whereby detection of an invalid value can be prevented. The evaporator temperature value is detected by the first temperature sensor or the second temperature sensor and is sent to the controller by the first temperature sensor or the second temperature sensor.
Since the evaporator may be one of the outdoor heat exchanger and the indoor heat exchanger under different operation modes of the air conditioner, before step S10, referring to fig. 2, the method for protecting against fluorine deficiency in the air conditioner further includes:
and step S02, acquiring the operation mode of the air conditioner.
It should be noted that, in the embodiment of the present application, the controller may be configured to control the air conditioner to change the operation mode, and the controller may be further configured to directly obtain the operation mode of the air conditioner. In other words, in step S02, the operation mode of the air conditioner may be directly acquired through control.
And step S04, if the operation mode of the air conditioner is a cooling mode or a dehumidifying mode, marking the indoor unit heat exchanger of the air conditioner as an evaporator.
When the operation mode of the air conditioner is a cooling mode or a dehumidification mode, the refrigerant is led out from the compressor and then flows through the external machine heat exchanger, the expansion valve and the internal machine heat exchanger in sequence, so that the internal machine heat exchanger can be marked as an evaporator. Therefore, under the condition that the operation mode of the air conditioner is a refrigeration mode or a dehumidification mode, the first temperature sensor detects the temperature value of the internal machine heat exchanger to obtain the evaporator temperature value, and the evaporator temperature value is sent to the controller.
And step S06, if the operation mode of the air conditioner is a heating mode, marking the external machine heat exchanger of the air conditioner as an evaporator.
When the operation mode of the air conditioner is a heating mode, the refrigerant is led out from the compressor and then flows through the indoor heat exchanger, the expansion valve and the indoor heat exchanger in sequence, so that the indoor heat exchanger can be marked as an evaporator. Therefore, when the operation mode of the air conditioner is the heating mode, the second temperature sensor detects the temperature value of the outer machine heat exchanger to obtain the evaporator temperature value, and the evaporator temperature value is sent to the controller.
It should be noted that, when the air conditioner has a fluorine deficiency phenomenon, the refrigerant pressure inside the evaporator is normally affected, and thus the temperature of the evaporator is affected; the evaporator refers to a heat exchanger for guiding the refrigerant back to the compressor, so that when the air conditioner operates in different operation modes, the heat exchanger for guiding the refrigerant back to the compressor is different, and therefore, the air conditioner operates in different operation modes, so that the accuracy and effectiveness of the fluorine deficiency protection method of the air conditioner can be ensured. In other words, different heat exchangers can be marked as evaporators according to different operation modes of the air conditioner, so that the temperatures of the different heat exchangers can be detected under different operation conditions, and the air conditioner fluorine deficiency protection method can be ensured to accurately and effectively control the air conditioner to perform fluorine deficiency protection.
Referring to fig. 1, after the evaporator is determined according to different operation modes of the air conditioner, step S10 is performed to receive an evaporator temperature value.
And step S20, receiving the environmental temperature value.
Wherein the ambient temperature value represents the temperature of the environment in which the evaporator is located. It should be noted that, when the operation mode of the air conditioner is the cooling mode or the dehumidification mode, the evaporator is an indoor unit heat exchanger, and based on this, the ambient temperature value represents the temperature of the environment where the indoor unit heat exchanger is located; when the operation mode of the air conditioner is the heating mode, the evaporator is an external machine heat exchanger, and based on the fact that the environment temperature value represents the temperature of the environment where the external machine heat exchanger is located.
Of course, in the embodiment of the present application, step S10 and step S20 may be performed simultaneously, or step S10 may be performed after step S20, but step S02, step S04, and step S06 are all performed before step S10 and step S20 to determine the evaporator first, and then step S10 and step S20 are performed based on the determined evaporator.
And step S30, calculating the difference between the evaporator temperature value and the environment temperature value to obtain a temperature difference value.
Under the condition that the controller obtains the evaporator temperature value and the environment temperature value, the difference value of the evaporator temperature value and the environment temperature value can be calculated to obtain the temperature difference value.
It should be noted that, in the case of the air conditioner having fluorine deficiency caused by refrigerant leakage, the refrigerant pressure inside the evaporator is affected, so that the detected temperature of the evaporator is affected; however, since the temperature of the evaporator varies depending on the ambient temperature, it is often misjudged whether the refrigerant leaks or not to cause fluorine deficiency by using the temperature of the evaporator. In the embodiment of the application, the temperature difference value obtained by calculating the difference value between the evaporator temperature value and the environment temperature value can be used for judging whether the refrigerant leaks to cause fluorine deficiency or not according to the temperature difference value, so that the judgment precision can be improved, and the accuracy and the effectiveness of the air conditioner fluorine deficiency protection method can be ensured.
Step S40, obtaining a first preset temperature value and a second preset temperature value according to a plurality of temperature differences calculated by the evaporator under a plurality of ambient temperature conditions.
It should be noted that the first preset temperature value and the second preset temperature value are obtained in the following manners: first, ensuring a rated amount of refrigerant in the air conditioner, in other words, having sufficient refrigerant in the air conditioner, can also be considered as a case where no refrigerant leakage occurs in the air conditioner. Based on the above situation, under the condition of different ambient temperatures, the evaporator temperature value and the ambient temperature value are respectively detected, and a plurality of temperature difference values are calculated. And acquiring a first preset temperature value and a second preset temperature value according to the plurality of temperature difference values obtained by calculation under the condition. The first preset temperature value is greater than the first preset temperature value.
The first preset temperature value and the second preset temperature value are selected according to the temperature difference values obtained through calculation in the mode, and the first preset temperature value and the second preset temperature value which are selected accordingly serve as comparison references, so that the current amount of the refrigerant can be reflected more accurately, whether the refrigerant leaks or not can be judged accurately, and the control accuracy of the air conditioner fluorine deficiency protection method is improved.
Of course, it should be noted that the first preset temperature value and the second preset temperature value may be values obtained through experiments before the air conditioner leaves a factory. Alternatively, the first preset temperature value and the second preset temperature value may be a plurality of temperature difference values calculated by the air conditioner executing step S10, step S20 and step S30 within a short time of installation time; based on this, under the condition of primary operation, only one temperature difference value is obtained through calculation, so that a first preset temperature value and a second preset temperature value can be obtained according to the temperature difference value, and under the condition of secondary operation, the first preset temperature value and the second preset temperature value can be obtained according to the temperature difference value obtained through calculation on the two sides. Wherein the temperature difference calculated in case of an installation time of more than 6 months may not be taken into account.
In some embodiments of the present application, referring to fig. 3, step S40 may include:
and step S41, acquiring a plurality of temperature difference values calculated by the evaporator under various environmental temperature conditions.
And step S42, screening the maximum difference and the minimum difference in the temperature differences.
Step S43, calculating a first preset temperature value according to the maximum difference.
Step S44, obtaining a second preset temperature value according to the minimum difference.
It should be noted that, through the steps S41 to S44, the first preset temperature value and the second preset temperature value may be obtained without presetting the first preset temperature value and the second preset temperature value. In other embodiments of the present application, if the air conditioner is shipped from a factory and the first preset temperature value and the second preset temperature value are set, the settings from step S41 to step S44 may be omitted.
The temperature of the evaporator is gradually reduced under the condition that the refrigerant starts to leak, so that the difference value between the temperature value of the evaporator and the ambient temperature value is increased, the first preset temperature value is calculated according to the maximum difference value, whether the refrigerant leaks or not can be accurately judged, and the judgment accuracy of the air conditioner fluorine deficiency protection method is improved. In addition, under the condition that the refrigerant is seriously leaked so that the amount of the refrigerant is close to the full leakage, at the moment, almost no liquid refrigerant exists in the evaporator, therefore, the temperature of the detected evaporator is closer to the temperature of the environment where the evaporator is located, and the difference between the temperature value of the evaporator and the temperature value of the environment is smaller.
Optionally, in some embodiments of the present application, the first preset temperature value is calculated according to the maximum difference in step S43 as follows:
the sum of the maximum difference and the preset value is taken as a first preset temperature value, in other words, the first preset temperature value is set to a value larger than the maximum difference. The maximum difference is the temperature difference which can be detected under the normal condition of the refrigerant, and the maximum difference is indicated to be detected under the normal condition of the air conditioner, so that the first preset temperature value is set to be a value which is larger than the maximum difference, and the condition that the air conditioner is lack of fluorine by mistake can be prevented.
Optionally, in some embodiments of the present application, a value range of the preset value may be greater than or equal to 1 ℃ and less than or equal to 30 ℃; in other words, the predetermined value can be 1 ℃, 2 ℃, 3 ℃, 4 ℃, 5 ℃, 6 ℃, 7 ℃, 8 ℃, 9 ℃, 10 ℃, 11 ℃, 12 ℃, 13 ℃, 14 ℃, 15 ℃, 16 ℃, 17 ℃, 18 ℃, 19 ℃, 20 ℃, 21 ℃, 22 ℃, 23 ℃, 24 ℃, 25 ℃, 26 ℃, 27 ℃, 28 ℃, 29 ℃, or 30 ℃ and the like. It should be noted that, under the condition that the value of the preset value is large, it indicates that the refrigerant needs to leak more to enable the temperature difference value to reach the first preset temperature value, in other words, the air conditioner fluorine deficiency protection method is less likely to trigger the fluorine deficiency protection; if the value of the preset value is smaller, the temperature difference value can reach the first preset temperature value by indicating that the refrigerant leaks a small amount, in other words, the air conditioner fluorine deficiency protection method is easier to trigger the fluorine deficiency protection. Therefore, the preset value can be selected according to the actual situation of the actual area, so that the use experience of a user is ensured.
In addition, in the step of acquiring the second preset temperature value by the minimum difference in step S44, the manner of acquiring the second preset temperature value may be:
and selecting a second preset temperature value in the interval which is greater than 0 and smaller than the minimum difference value. In other words, a value smaller than the minimum difference is selected as the second preset temperature value. It should be noted that, since the minimum difference is a temperature difference that can be detected under normal conditions of the refrigerant, which means that the air conditioner will detect the minimum difference under normal conditions, the second preset temperature value is set to a value smaller than the maximum difference, so that the air conditioner fluorine deficiency protection method can be prevented from falsely reporting fluorine deficiency.
It should be noted that, under the condition that the value of the second preset temperature value is larger, it indicates that the second preset temperature value is closer to the minimum temperature value, in other words, the air conditioner fluorine deficiency protection method is easier to trigger fluorine deficiency protection; if the value of the second preset temperature value is smaller, it indicates that the difference between the second preset temperature value and the minimum temperature value is larger, in other words, the air conditioner fluorine deficiency protection method is less prone to trigger fluorine deficiency protection. Therefore, the preset value can be selected according to the actual situation of the actual area, so that the use experience of a user is ensured.
After the first preset temperature value and the second preset temperature value are obtained, the air conditioner fluorine deficiency protection method can effectively judge whether the refrigerant leaks.
Referring to fig. 1, the method for protecting the air conditioner from fluorine deficiency includes:
and step S50, controlling the air conditioner to execute fluorine-lacking protection according to the first preset temperature value, the second preset temperature value and the temperature difference value.
It should be noted that the evaporator selected when the air conditioner operates in the heating mode is different from the evaporator selected when the air conditioner operates in the cooling mode or the dehumidification mode, and therefore, in some embodiments of the present application, the step S50 executed in the case of the air conditioner operating in the heating mode has some differences from the step S50 executed in the case of the air conditioner operating in the cooling mode or the dehumidification mode.
Alternatively, if the air conditioner operates in the heating mode, referring to fig. 4, step S50 includes:
step S51, determining whether the temperature difference is less than a second predetermined temperature value and lasts for a first predetermined time.
If the temperature difference value falls in the interval defined by the minimum difference value and the maximum difference value, the refrigerant of the air conditioner is in a normal state, and if the temperature difference value is smaller than a second preset temperature value, the refrigerant is leaked. Of course, in order to prevent the situation that the temperature difference value is fluctuated and reaches the second preset temperature value instantaneously, and the misjudgment occurs, it is further determined whether the state that the temperature difference value is smaller than the second preset temperature value lasts for the first preset time, so that the misjudgment is avoided.
Alternatively, the first preset time may have a value in a range of 5s to 30s, in other words, the first preset time may have a value of 5s, 6s, 7s, 8s, 9s, 10s, 11s, 12s, 13s, 14s, 15s, 16s, 17s, 18s, 19s, 20s, 21s, 22s, 23s, 24s, 25s, 26s, 27s, 28s, 29s, or 30s, and the like.
And step S52, if yes, controlling the air conditioner to execute fluorine-lacking protection.
In other words, in the case that the temperature difference value is less than the second preset temperature value for the first preset time, it indicates that the amount of the refrigerant is close to or has reached a complete leakage state, thereby controlling the air conditioner to perform the fluorine deficiency protection.
And step S53, if not, controlling the air conditioner to execute fluorine-lacking protection according to the temperature difference value and the first preset temperature value.
That is, if the determination result in step S51 is no, it indicates that the refrigerant has not reached a state close to or completely leaking, and based on this, it is necessary to determine whether the air conditioner has a fluorine deficiency condition based on the relationship between the temperature difference and the first preset temperature value, so as to control the air conditioner to perform the fluorine deficiency protection.
In some embodiments of the present application, referring to fig. 5, step S53 may include:
step S531, determining whether the temperature difference is greater than a first preset temperature value and lasts for a second preset time.
If the temperature difference value is larger than the first preset temperature value, the refrigerant leakage condition is indicated. Of course, in order to prevent the situation that misjudgment occurs due to the fact that the temperature difference value is fluctuated and reaches the first preset temperature value instantaneously, whether the state that the temperature difference value is greater than the first preset temperature value lasts for the second preset time is judged, and therefore misjudgment is avoided.
Alternatively, the second preset time may have a value in a range of 5s to 30s, in other words, the second preset time may have a value of 5s, 6s, 7s, 8s, 9s, 10s, 11s, 12s, 13s, 14s, 15s, 16s, 17s, 18s, 19s, 20s, 21s, 22s, 23s, 24s, 25s, 26s, 27s, 28s, 29s, or 30s, and the like.
And S532, if yes, controlling the air conditioner to defrost.
In other words, in the case that the temperature difference is greater than the first preset temperature value as a result of the determination in step S531, the air conditioner is controlled to perform a defrosting operation, so as to prevent the outdoor heat exchanger from frosting due to the heating mode of the air conditioner, which affects the determination of the air conditioner fluorine deficiency protection method and causes the occurrence of a false fluorine deficiency condition. If the determination result in step S531 is yes, the air conditioner is forcibly controlled to perform the defrosting mode, so that the air conditioner performs defrosting. Namely, the four-way valve is forcibly controlled to switch the working state, so that the operation mode of the air conditioner is switched from the heating mode to the defrosting mode, in other words, the refrigerant is led out from the compressor and then flows through the outer machine heat exchanger, the expansion valve and the inner machine heat exchanger in sequence, and thus the defrosting treatment is performed on the outer machine heat exchanger.
Of course, if the determination result of step S531 is negative, in other words, if the determination result of step S531 is that the temperature difference is less than or equal to the first preset temperature value, the current operation state of the air conditioner is maintained to continue to operate.
And step S533, after the defrosting of the air conditioner is finished, acquiring the evaporator temperature value and the environment temperature value again to recalculate the temperature difference value.
It should be noted that, in order to ensure the control accuracy of the air conditioner fluorine deficiency protection method, after the defrosting of the air conditioner is finished, the air conditioner is controlled to operate for a fifth preset time, so that the air conditioner operates to reach a stable state, and then the evaporator temperature value at the inlet of the evaporator and the ambient temperature value of the environment where the evaporator is located are received again, so as to recalculate the temperature difference value. Therefore, whether the air conditioner has fluorine deficiency can be judged according to the acquired temperature difference value, and the judgment precision can be improved.
Optionally, the value range of the fifth preset time may be 3min to 5 min; in other words, the value of the fifth preset time can also be 3min, 3.5min, 4min, 4.5min or 5 min.
After the temperature difference value is obtained again, the step of controlling the air conditioner to execute the fluorine-lacking protection according to the temperature difference value and the first preset temperature value further comprises the following steps:
step S534, determining whether the recalculated temperature difference is greater than a first preset temperature value and lasts for a second preset time.
Step 535, if yes, the air conditioner is controlled to execute the fluorine-lacking protection.
In other words, after the temperature difference value is obtained again, the temperature difference value is still greater than the first preset temperature value, which indicates that the air conditioner has refrigerant leakage, and therefore, the air conditioner can be controlled to execute fluorine-lacking protection.
Of course, if the determination result in step S534 is negative, in other words, if the determination result in step S534 is that the re-acquired temperature difference is less than or equal to the first preset temperature value, it indicates that the previous determination result indicates that the temperature difference is greater than the first preset temperature value, which is an erroneous determination caused by the frosting condition, and based on this, the current operation state of the air conditioner can be maintained.
Of course, referring to fig. 6, in the case that the air conditioner operates in the cooling mode or the dehumidifying mode, step S50 may include:
step S501, determining whether the temperature difference is greater than a first preset temperature value and lasts for a third preset time.
And step S502, if yes, controlling the air conditioner to execute fluorine-lacking protection.
And S503, if not, controlling the air conditioner to execute fluorine-lacking protection according to the temperature difference value and a second preset temperature value.
Note that, if the temperature difference is greater than the first preset temperature value, it indicates that there is a refrigerant leak. Of course, in order to prevent the situation that the temperature difference value is fluctuated, the temperature difference value instantly reaches the first preset temperature value and is misjudged, and then whether the state that the temperature difference value is greater than the first preset temperature value lasts for the third preset time is judged, so that misjudgment is avoided.
Alternatively, the third preset time may have a value in a range of 5s to 30s, in other words, the third preset time may have a value of 5s, 6s, 7s, 8s, 9s, 10s, 11s, 12s, 13s, 14s, 15s, 16s, 17s, 18s, 19s, 20s, 21s, 22s, 23s, 24s, 25s, 26s, 27s, 28s, 29s, or 30s, and the like.
Of course, if the temperature difference is less than or equal to the first preset temperature value, it is necessary to determine whether the air conditioner has a situation that the refrigerant is completely leaked or the refrigerant is nearly completely leaked according to a relationship between the temperature difference and the second preset temperature value, so as to determine whether the air conditioner needs to execute the fluorine-deficient protection action, and improve the accuracy of the fluorine-deficient protection.
In some embodiments of the present application, referring to fig. 7, step S503 may include:
step S5031, determining whether the temperature difference is smaller than a second preset temperature value for a fourth preset time.
And if the temperature difference value is less than the second preset temperature value, the situation that the refrigerant in the air conditioner is nearly completely leaked or the refrigerant is completely leaked is represented. If the temperature difference value is smaller than the second preset temperature value for the fourth preset time, the state that the temperature difference value is smaller than the second preset temperature value is longer in duration, and the condition of misjudgment caused by temperature fluctuation can be eliminated, so that the condition that the temperature difference value is smaller than the second preset temperature value indeed can be shown, that is, the condition that the refrigerant is nearly completely leaked or the refrigerant is completely leaked is shown.
Step S5032, if yes, controlling the air conditioner to perform fluorine deficiency protection.
In other words, if the determination result in step S5031 is yes, the air conditioner is controlled to perform the fluorine-deficient protection, so as to prevent the air conditioner from operating in a fluorine-deficient state and causing a failure.
Of course, if the determination result in the step S5031 is negative, in other words, if the determination result in the step S5031 is that the temperature difference is greater than or equal to the second preset temperature value, or the case that the temperature difference is less than the second preset temperature value does not last for the fourth preset time, it indicates that the air conditioner does not have a case that the refrigerant is completely leaked or nearly completely leaked, and thus the air conditioner can be controlled to maintain the current state operation.
The air conditioner fluorine deficiency protection method provided by the embodiment of the application can judge whether the air conditioner has refrigerant leakage according to the condition of evaporator temperature change caused by the change of refrigerant pressure in the evaporator under the condition of refrigerant leakage, thereby improving the technical problem that the air conditioning effect of the air conditioner is influenced due to the lack of the fluorine deficiency protection method in the prior art.
Referring to fig. 8, fig. 8 is a schematic diagram illustrating functional modules of an air conditioner fluorine deficiency protection apparatus provided in an embodiment of the present application in order to perform possible steps of the air conditioner fluorine deficiency protection method. The air conditioner fluorine deficiency protection device is applied to the air conditioner and is used for executing the air conditioner fluorine deficiency protection method. It should be noted that the basic principle and the technical effects of the fluorine-deficient protection device for an air conditioner provided in the present embodiment are substantially the same as those of the above embodiments, and for the sake of brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents in the above embodiments.
The air conditioner fluorine deficiency protection device comprises a first receiving module 10, a second receiving module 20, a calculating module 30, an obtaining module 40 and a control module 50.
The first receiving module 10 is configured to receive an evaporator temperature value, wherein the evaporator temperature value represents a temperature at an inlet of an evaporator of the air conditioner.
Optionally, the first receiving module 10 may specifically execute step S10 in each of the above-mentioned figures to achieve the corresponding technical effect.
The second receiving module 20 is configured to receive an ambient temperature value, where the ambient temperature value represents a temperature of an environment in which the evaporator is located.
Optionally, the second receiving module 20 may specifically execute step S20 in each of the above-mentioned figures to achieve the corresponding technical effect.
It should be noted that, in other embodiments of the present application, the first receiving module 10 and the second receiving module 20 may be integrated into one module, so that the above steps S10 and S20 are performed by the module, and the corresponding technical effect is achieved.
The calculation module 30 is configured to calculate a difference between the evaporator temperature value and the ambient temperature value to obtain a temperature difference.
Optionally, the calculating module 30 may be specifically configured to execute step S30 in each of the above-mentioned figures, so as to achieve the corresponding technical effect.
The obtaining module 40 is configured to obtain a first preset temperature value and a second preset temperature value according to a plurality of temperature difference values calculated by the evaporator under a plurality of ambient temperature conditions; the first preset temperature value is greater than the second preset temperature value.
Optionally, the obtaining module 40 may be specifically configured to execute step S40 and its sub-steps in the above-mentioned figures, so as to achieve the corresponding technical effect.
The control module 50 is used for controlling the air conditioner to execute fluorine deficiency protection according to a first preset temperature value, a second preset temperature value and a temperature difference value.
Optionally, the control module 50 may be specifically configured to execute the step S50 and the sub-steps thereof in the above-mentioned figures, so as to achieve the corresponding technical effect.
In summary, the air conditioner fluorine deficiency protection method, the air conditioner fluorine deficiency protection device and the air conditioner provided in the embodiments of the present application can determine whether there is refrigerant leakage in the air conditioner according to the condition of temperature change of the evaporator caused by pressure change of the refrigerant in the evaporator under the condition of refrigerant leakage, so as to solve the technical problem that the air conditioning effect of the air conditioner is affected due to lack of the fluorine deficiency protection method in the prior art. In addition, the judgment of whether the air conditioner leaks is carried out by utilizing the first preset temperature value and the second preset temperature value which are obtained according to the minimum difference value and the maximum difference value, so that whether the refrigerant leaks can be accurately judged, and the judgment accuracy of the air conditioner fluorine deficiency protection method is improved.
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. The air conditioner fluorine deficiency protection method is characterized by comprising the following steps:
receiving an evaporator temperature value representing a temperature at an inlet of an evaporator of an air conditioner;
receiving an ambient temperature value representing a temperature of an environment in which the evaporator is located;
calculating the difference value between the evaporator temperature value and the environment temperature value to obtain a temperature difference value;
acquiring a first preset temperature value and a second preset temperature value according to a plurality of temperature difference values calculated by the evaporator under various environmental temperature conditions; the first preset temperature value is greater than the second preset temperature value;
and controlling the air conditioner to execute fluorine-lacking protection according to the first preset temperature value, the second preset temperature value and the temperature difference value.
2. An air conditioner fluorine deficiency protection method according to claim 1, wherein prior to the step of receiving an evaporator temperature value, the air conditioner fluorine deficiency protection method further comprises:
acquiring an operation mode of the air conditioner;
if the operation mode of the air conditioner is a refrigeration mode or a dehumidification mode, marking an internal machine heat exchanger of the air conditioner as the evaporator;
and if the operation mode of the air conditioner is a heating mode, marking an external unit heat exchanger of the air conditioner as the evaporator.
3. An air conditioner fluorine deficiency protection method according to claim 1, wherein the step of obtaining a first preset temperature value and a second preset temperature value from a plurality of said temperature difference values calculated by said evaporator under a plurality of ambient temperature conditions comprises:
obtaining a plurality of temperature difference values calculated by the evaporator under various environmental temperature conditions;
screening a maximum difference value and a minimum difference value in a plurality of temperature difference values;
calculating the first preset temperature value according to the maximum difference value;
and acquiring the second preset temperature value according to the minimum difference value.
4. An air conditioner fluorine deficiency protection method according to claim 3, wherein the step of calculating the first preset temperature value according to the maximum difference value comprises:
taking the sum of the maximum difference value and a preset value as the first preset temperature value, wherein the value range of the preset value is more than or equal to 1 ℃ and less than or equal to 30 ℃;
the step of obtaining the second preset temperature value according to the minimum difference value comprises the following steps:
and acquiring the second preset temperature value in an interval which is greater than 0 and smaller than the minimum difference value.
5. An air conditioner fluorine deficiency protection method according to claim 2, wherein the step of controlling the air conditioner to perform fluorine deficiency protection according to the first preset temperature value, the second preset temperature value and the temperature difference value if the air conditioner is operated in a heating mode comprises:
judging whether the temperature difference value is smaller than a second preset temperature value and lasts for a first preset time;
if yes, controlling the air conditioner to execute fluorine-lacking protection;
if not, controlling the air conditioner to execute fluorine-lacking protection according to the temperature difference value and the first preset temperature value.
6. An air conditioner fluorine deficiency protection method according to claim 5, wherein the step of controlling an air conditioner to perform fluorine deficiency protection according to the temperature difference and the first preset temperature value comprises:
judging whether the temperature difference value is greater than the first preset temperature value and lasts for a second preset time;
if yes, controlling the air conditioner to defrost;
after defrosting of the air conditioner is finished, the evaporator temperature value and the environment temperature value are obtained again to calculate the temperature difference value again;
judging whether the temperature difference obtained by recalculation is larger than the first preset temperature value and lasts for the second preset time;
and if so, controlling the air conditioner to execute fluorine-lacking protection.
7. An air conditioner fluorine deficiency protection method according to claim 2, wherein the step of controlling the air conditioner to perform fluorine deficiency protection according to the first preset temperature value, the second preset temperature value and the temperature difference value if the air conditioner is operated in a cooling mode or a dehumidifying mode comprises:
judging whether the temperature difference value is greater than the first preset temperature value and lasts for a third preset time;
if yes, controlling the air conditioner to execute fluorine-lacking protection;
if not, controlling the air conditioner to execute fluorine-lacking protection according to the temperature difference value and the second preset temperature value.
8. The fluorine deficiency protection method for an air conditioner according to claim 7, wherein the step of controlling the air conditioner to perform the fluorine deficiency protection according to the temperature difference and the second preset temperature value comprises:
judging whether the temperature difference value is smaller than the second preset temperature value and lasts for a fourth preset time;
and if so, controlling the air conditioner to execute fluorine-lacking protection.
9. The utility model provides an air conditioner lacks fluorine protection device, is applied to the air conditioner which characterized in that, air conditioner lacks fluorine protection device and includes:
a first receiving module for receiving an evaporator temperature value representing a temperature at an inlet of an evaporator of an air conditioner;
a second receiving module, configured to receive an ambient temperature value, where the ambient temperature value represents a temperature of an environment in which the evaporator is located;
the calculation module is used for calculating the difference value between the evaporator temperature value and the environment temperature value to obtain a temperature difference value;
the acquisition module is used for acquiring a first preset temperature value and a second preset temperature value according to a plurality of temperature difference values calculated by the evaporator under various environmental temperature conditions; the first preset temperature value is greater than the second preset temperature value;
and the control module is used for controlling the air conditioner to execute fluorine-lacking protection according to the first preset temperature value, the second preset temperature value and the temperature difference value.
10. An air conditioner is characterized by comprising a temperature detection device and a controller; the temperature detection device is used for detecting an evaporator temperature value at an inlet of an evaporator of the air conditioner and is also used for detecting an environment temperature value of the environment where the evaporator is located; the temperature detection device is electrically connected with the controller to send the detected evaporator temperature value and the detected environment temperature value to the controller, and the controller is used for executing the air conditioner fluorine deficiency protection method according to any one of claims 1 to 8.
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| CN113623818A (en) * | 2021-07-26 | 2021-11-09 | 宁波奥克斯电气股份有限公司 | Heating mode fluorine deficiency detection method and device, air conditioner and computer readable storage medium |
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