CN112696800B - Electric heater protection method and device of air conditioner, storage medium and air conditioner - Google Patents
Electric heater protection method and device of air conditioner, storage medium and air conditioner Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000003507 refrigerant Substances 0.000 claims abstract description 21
- 230000005855 radiation Effects 0.000 claims description 43
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 1
- 238000005485 electric heating Methods 0.000 description 5
- NJVOZLGKTAPUTQ-UHFFFAOYSA-M fentin chloride Chemical compound C=1C=CC=CC=1[Sn](C=1C=CC=CC=1)(Cl)C1=CC=CC=C1 NJVOZLGKTAPUTQ-UHFFFAOYSA-M 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
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- 238000001514 detection method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000006386 memory function Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 239000000243 solution Substances 0.000 description 1
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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
- F24F11/67—Switching between heating and cooling modes
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
- F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical energy supply
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a method and a device for protecting an electric heater of an air conditioner, a storage medium and the air conditioner, wherein the method comprises the following steps: detecting a target temperature value of a heat pump refrigerant circulation pipeline through a temperature sensing bulb; and judging whether the electric heater is in a dry-burning state or not based on the target temperature value, and starting a dry-burning protection program when the electric heater is judged to be in the dry-burning state so as to carry out dry-burning protection on the electric heater according to the dry-burning protection program. The invention provides a low-cost electric heater protection method, which can avoid serious safety consequences caused by dry burning of an electric heater under the condition that a relay fails and improve the use safety of an air conditioner.
Description
Technical Field
The invention relates to the field of automatic control, in particular to an electric heating protection method and device of an air conditioner, a storage medium and the air conditioner.
Background
At present, a household air conditioner generally uses a ceramic PTC (Positive Temperature Coefficient) electric heater for auxiliary heating to make up for poor user comfort caused by insufficient heat of a heat pump heating system of the air conditioner. At present, the PTC electric heater is switched on and off only through the relay in a circuit, but when the short circuit inside the relay fails and contacts are adhered, the ceramic PTC electric heater is always in dry burning operation as long as the whole air conditioner is not powered off. In the standby condition, if the PTC is dried and burnt easily, the heat cannot be dissipated, and the temperature of the material around the air duct rises, the injection molding part is easily deformed, and even the severe safety accident can be caused because the complete machine is ignited by the overhigh temperature. At present, the circuit has no closed-loop control, and the air conditioner controller cannot judge the working state of the electric heater under the abnormal condition.
The technology that adopts at present installs an air-out temperature acquisition unit, electric heater alarm unit additional in through the air outlet, and control circuit adopts two contactors moreover, and whole input cost is great.
Disclosure of Invention
The invention provides an electric heating protection method and device of an air conditioner, a storage medium and the air conditioner, which are low-cost electric heater protection methods and can avoid serious safety consequences caused by dry burning of an electric heater under the condition that a relay fails, so that the use safety of the air conditioner is improved.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect of the present invention, there is provided an electric heating protection method for an air conditioner, including:
the air conditioner comprises a heat exchanger assembly; the heat exchanger assembly comprises a heat exchanger with an arc-shaped structure, an electric heater, a heat pump refrigerant circulation pipeline and a temperature sensing bulb; the method comprises the following steps:
detecting a target temperature value of the heat pump refrigerant circulation pipeline through the temperature sensing bulb;
judging whether the electric heater is in a dry-burning state or not based on the target temperature value;
and if so, starting a dry-burning protection program to perform dry-burning protection on the electric heater according to the dry-burning protection program.
According to an embodiment of the present invention, one side of the thermal bulb is attached to the heat pump refrigerant circulation pipeline, and the other side is exposed to the inner side of the arc structure of the heat exchanger; the target temperature value of the heat pump refrigerant circulation pipeline is detected through the temperature sensing bulb, and the method comprises the following steps:
and acquiring a temperature value obtained by superposing the temperature value of the heat pump refrigerant circulation pipeline and the temperature value of the electric heater through the temperature sensing bulb, wherein the temperature value is used as a target temperature value of the heat pump refrigerant circulation pipeline.
According to an embodiment of the present invention, the determining whether the electric heater is in a dry-fire state based on the target temperature value includes:
acquiring an indoor environment temperature value of an indoor environment to which the air conditioner belongs;
acquiring a heat generator radiation increment value based on the indoor environment temperature value and a preset heat radiation increment relation between the environment temperature and the temperature of the pipe heated by the heat generator;
and comparing the target temperature value with the heater radiation increment value, and judging whether the electric heater is in a dry-burning state according to a comparison result.
According to an embodiment of the present invention, when the operation mode of the air conditioner is a cooling mode or a heating mode, the comparing the target temperature value with the heater radiation increment value and determining whether the electric heater is in a dry-fire state according to the comparison result includes:
comparing the target temperature value with the sum of a preset normal temperature value and the radiator radiation increment value;
and if the target temperature value is greater than the sum of the normal temperature value and the heater radiation increment value, judging that the electric heater is in a dry-burning state.
According to an embodiment of the present invention, when the operation mode of the air conditioner is a standby mode, the comparing the target temperature value with the heater radiation increment value and determining whether the electric heater is in a dry-heating state according to the comparison result includes:
comparing the target temperature value to a sum of the indoor ambient temperature value and the heater radiation increment value;
and if the target temperature value is greater than the sum of the indoor environment temperature value and the heater radiation increment value, judging that the electric heater is in a dry-burning state.
According to an embodiment of the present invention, the starting of the dry-fire protection program to perform dry-fire protection on the electric heater according to the dry-fire protection program includes:
starting a dry combustion protection program, and switching a heat pump system of the air conditioner into a refrigeration mode state;
adjusting an air deflector of the air conditioner to a maximum angle;
setting keys of a remote controller and a control panel of the air conditioner to be in a failure state, and sending fault prompt information;
the fault prompt message comprises the sound prompt message and a light prompt message.
A second aspect of the present invention provides an electric heater protection apparatus of an air conditioner, which includes one or more processors and a non-transitory computer-readable storage medium storing program instructions, the one or more processors being configured to implement an electric heater protection method of an air conditioner of the present invention when the one or more processors execute the program instructions.
A third aspect of the present invention provides a non-transitory computer readable storage medium having stored thereon program instructions for implementing an electric heater protection method of an air conditioner of the present invention when the program instructions are executed by one or more processors.
A fourth aspect of the present invention provides an air conditioner employing an electric heater protection method of the present invention, or including an electric heater protection apparatus of the present invention, or having a non-transitory computer-readable storage medium according to the present invention.
The invention has the beneficial effects that: detecting a target temperature value of a heat pump refrigerant circulation pipeline through a temperature sensing bulb; judging whether the electric heater is in a dry-burning state or not based on the target temperature value; if yes, starting a dry-burning protection program to perform dry-burning protection on the electric heater according to the dry-burning protection program. The control scheme of the invention provides a low-cost electric heater protection method, so that the serious safety consequence caused by dry burning of the electric heater under the condition of failure of the relay is avoided, and the use safety of the air conditioner is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an electric heating protection method of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a heat exchanger assembly according to an exemplary embodiment of the present invention;
FIG. 3 is a schematic diagram of a heat exchanger according to an exemplary embodiment of the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
As used herein, the terms "first," "second," and the like may be used to describe elements of exemplary embodiments of the invention. These terms are only used to distinguish one element from another element, and the inherent features or order of the corresponding elements and the like are not limited by the terms. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms, such as those defined in commonly used dictionaries, are to be interpreted as having a meaning that is consistent with their context in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Those skilled in the art will understand that the devices and methods of the present invention described herein and illustrated in the accompanying drawings are non-limiting exemplary embodiments and that the scope of the present invention is defined solely by the claims. Features illustrated or described in connection with one exemplary embodiment may be combined with features of other embodiments. Such modifications and variations are intended to be included within the scope of the present invention.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, a detailed description of related known functions or configurations is omitted to avoid unnecessarily obscuring the technical points of the present invention. In addition, the same reference numerals refer to the same circuits, modules or units throughout the description, and repeated descriptions of the same circuits, modules or units are omitted for brevity.
Further, it should be understood that one or more of the following methods or aspects thereof may be performed by at least one control system, control unit, or controller. The term "control unit", "controller", "control module" or "main control module" may refer to a hardware device including a memory and a processor, and the term "air conditioner" may refer to a device similar to a heating device. The memory or computer-readable storage medium is configured to store program instructions, while the processor is specifically configured to execute the program instructions to perform one or more processes that will be described further below. Moreover, it is to be appreciated that the following methods may be performed by including a processor in conjunction with one or more other components, as will be appreciated by one of ordinary skill in the art.
Fig. 1 is a flowchart of an electric heating protection method of an air conditioner according to an embodiment of the present application. Referring to fig. 1, an electrical heating protection method for an air conditioner according to an embodiment of the present application may include:
step S101, detecting a target temperature value of a heat pump refrigerant circulation pipeline through a temperature sensing bulb; the temperature sensing bulb and the heat pump refrigerant circulation pipeline both belong to one of heat exchanger components of the air conditioner.
The heat exchanger is an energy-saving device for transferring heat between materials between two or more fluids with different temperatures, and is used for transferring heat from the fluid with higher temperature to the fluid with lower temperature to make the temperature of the fluid reach the index specified by the process so as to meet the requirements of process conditions, and is also one of main devices for improving the utilization rate of energy.
The air conditioner includes a heat exchanger assembly, as shown in fig. 2 to 3, including a heat exchanger having an arc structure, an electric heater (such as a ceramic PTC electric heater), a heat pump refrigerant circulation pipeline, and a temperature sensing bulb (such as a thermistor).
The aluminum fin heat exchanger is of a certain arc-shaped structure, the electric heater is placed inside, and indoor air is heated by the heat exchanger and then by the electric heater. The temperature sensing bulb in the heat exchanger assembly is one of the components of a thermostatic expansion valve, is generally bound on an air outlet pipe of the heat exchanger and is used for sensing the temperature of an outlet of the heat exchanger, converting the temperature information into pressure information and transmitting the pressure information to a valve body, thereby playing a role in regulating the flow.
As shown in fig. 3, one side of the thermal bulb in the embodiment of the present invention is attached to the heat pump refrigerant circulation pipeline, and the other side is exposed inside the spiral of the heat exchanger, that is, inside the arc structure of the heat exchanger, so as to detect the temperature of the heat pump cold flow circulation pipeline and the temperature of the working radiation of the electric heater. Two region detection are realized by sharing one temperature sensing bulb, so that the material cost is better saved.
In the embodiment of the invention, the temperature value of the heat pump refrigerant circulation pipeline is collected through the temperature sensing bulb on one hand, the temperature value of the electric heater is collected on the other hand, then the two temperature values are superposed, and the superposed temperature value is used as a target temperature value which needs to be detected and is collected by the heat pump refrigerant circulation pipeline.
And step S102, judging whether the electric heater is in a dry-burning state or not based on the target temperature value.
Specifically, an indoor environment temperature value of an indoor environment to which an air conditioner belongs is obtained; then acquiring a heat radiator radiation increment value based on the indoor environment temperature value and a preset heat radiation increment relation between the environment temperature and the temperature of the pipe heated by the heater; and then comparing the target temperature value with the radiator radiation increment value, and judging whether the electric heater is in a dry-burning state according to the comparison result.
In the embodiment of the present invention, the relationship between the ambient temperature and the increment of the heat radiation from the heater to the tube temperature is preset, and the relationship can be specifically shown in table 1Let us assume with TInner ringIndicating the ambient temperature, Tptc radiationRepresenting the heater radiation increment value.
TABLE 1 ambient temperature and heat radiation increment temperature corresponding table
| Environment TInner ring | -10℃～-5℃ | -5℃～0℃ | 0～10℃ | 10℃～15℃ | 15℃～30℃ |
| Tptc radiation | 5℃～8℃ | 6℃～10℃ | 8℃～15℃ | 12℃～15℃ | 13℃～20℃ |
Table 1 only schematically shows a schematic diagram of a relationship between an ambient temperature and a heat radiation increment of heat emitted from a heater to a tube temperature, and in practical applications, different increment relationships may be correspondingly set for different geographic environments and different application scenarios, which is not limited in the embodiment of the present invention.
In an alternative embodiment of the present invention, before comparing the target temperature value with the heater radiation increment value, the operating mode of the air conditioner may be determined:
s1: if the working mode of the air conditioner is a cooling mode or a heating mode, the target temperature value (T) is required to be setTemperature of the tube) And a preset normal temperature value (T)Is normal) And a heater radiation increment value (T)ptc radiation) Comparing the sum; and if the target temperature value is greater than the sum of the normal temperature value and the radiator radiation increment value, judging that the electric heater is in a dry-burning state. Wherein the normal temperature value (T)Is normal) The temperature value of the electric heater in normal operation can be acquired and set in advance.
S2: if the working mode of the air conditioner is the standby mode, the target temperature value (T) is requiredTemperature of the tube) And indoor ambient temperature value (T)Inner ring) And a heater radiation increment value (T)ptc radiation) Comparing the sum; and if the target temperature value is greater than the sum of the indoor environment temperature value and the radiator radiation increment value, judging that the electric heater is in a dry-burning state.
For example, first, the air conditioner main control obtains the temperature value (T) of the corresponding position in real time through the thermal bulbTemperature of the tube) If the relay of the electric heater fails to cause a circuit path or the contacts are adhered, the PTC is in an open state in various working modes. The tube temperature parameter intervals are shown in table 2.
TABLE 2 parameter table between tube temperature zones
Wherein, Tptc radiationThe value range is 5-20 ℃, Tptc radiationWith the indoor environment TInner ringAnd (4) correlating.
And then, on the premise of judging the current working mode of the air conditioner, carrying out dry burning judgment on the electric heater:
the air conditioner is in a cooling and heating mode, and the current indoor environment temperature value T is obtainedInner ring(ii) a Obtaining T according to the relationship between the ambient temperature and the heat radiation increment of the preset PTC heating radiation to the tube temperatureptc radiationAn increment value. If T isTemperature of the tube>(TIs normal+TPTC radiation) Then indicating that the PTC electric heater is in a dry-fire state at present, if TTemperature of the tube≤(TIs normal+TPTC radiation) It means that the PTC electric heater is not in a dry-fire state at present.
If the indoor environment temperature is in the standby mode, firstly obtaining the current indoor environment temperature value TInner ring(ii) a Obtaining T according to the relationship between the ambient temperature and the heat radiation increment of the preset PTC heating radiation to the tube temperatureptc radiationAn increment value. If T isTemperature of the tube＞(TInner ring+TPTC radiation) If so, indicating that the current PTC electric heater is in a dry-burning state; if T isTemperature of the tube≤(TInner ring+TPTC radiation) It means that the PTC electric heater is not in a dry-fire state at present.
In the above cooling, heating or standby modes, if mode switching is involved, each mode needs to be switched and operates stably (i.e. the fluctuation of the tube temperature is less than a preset value), and then the above parameters are detected and judged.
Step S103: and if the electric heater is in the dry-burning state, starting a dry-burning protection program to perform dry-burning protection on the electric heater according to the dry-burning protection program.
Optionally, a dry-fire protection program can be started to switch the heat pump system of the air conditioner to a refrigeration mode state; adjusting an air deflector of the air conditioner to a maximum angle; setting the remote controller of the air conditioner and the keys of the control panel to be in a failure state, and sending out fault prompt information; the fault prompt message comprises the sound prompt message and the light prompt message. On the other hand, if it is determined that the electric heater is not in the dry-fire state, the step S101 may be continuously performed to sense the target temperature value of the heat pump refrigerant circulation pipeline.
As described above, when the dry-fire state of the electric heater is detected, the air conditioning heat pump system is switched to the cooling mode state regardless of the heating mode, the cooling mode, or the standby mode, so that the ambient temperature of the indoor-side heat exchanger is lowered.
If the fan of the indoor unit of the air conditioner is not started, the indoor fan is immediately started and operates at a high wind level, and the air deflector of the air conditioner operates at the angle of the most smooth air outlet. Therefore, heat of the indoor unit cavity is quickly dissipated, and deformation of the injection molding part caused by overhigh temperature of the inner cavity due to heat concentration is avoided.
Furthermore, the remote control of the air conditioner and the panel key are invalid, so that a user cannot operate the air conditioner; the buzzer sends out a reminding sound; the panel flickers to display the fault state, so as to remind a user that the air conditioner is in an abnormal state, and the user cannot turn off the air conditioner, and then the user is guided to forcibly turn off the power plug and the socket of the air conditioner, so that the whole machine is powered off. Namely, the further safety accidents are avoided, the user actively seeks for after-sale treatment, and long-term work is avoided.
Meanwhile, the air conditioner has a memory function, if the air conditioner is not reset by special operation, the state is still kept after the air conditioner is electrified again until after-sales maintenance is reset.
The present invention also provides, in accordance with one or more embodiments of the present invention, an electric heater protection device for an air conditioner, including one or more processors and a non-transitory computer-readable storage medium storing program instructions for implementing the methods or processes of the various embodiments of the present invention as set forth above when the program instructions are executed by the one or more processors.
The present invention also provides, in accordance with one or more embodiments of the invention, a non-transitory computer-readable storage medium having stored thereon program instructions which, when executed by one or more processors, are used to implement the methods or processes of the various embodiments of the invention as set forth above.
According to one or more embodiments of the present invention, the present invention also provides an air conditioner, which adopts the method of the present invention as described above, or includes the electric heater protection device with an air conditioner of the present invention, or has the non-transitory computer readable storage medium as described above.
According to one or more embodiments of the present invention, the electric heater protection method of an air conditioner of the present invention may use encoded instructions (e.g., computer and/or machine readable instructions) stored on a non-transitory computer and/or machine readable medium (e.g., a hard disk drive, a flash memory, a read-only memory, a compact disk, a digital versatile disk, a cache, a random access memory, and/or any other storage device or storage disk) in which information for any period of time (e.g., an extended period of time, a permanent, a transient instance, a temporary cache, and/or an information cache) is stored to implement the processing of the control method as described above in the present invention. As used herein, the term "non-transitory computer-readable medium" is expressly defined to include any type of computer-readable storage device and/or storage disk and to exclude propagating signals and to exclude transmission media.
According to one or more embodiments of the present invention, a master control system or control module of an air conditioner may include one or more processors and may also include a non-transitory computer readable medium therein. Specifically, a microcontroller MCU may be included in an electric heater protection apparatus (a main control system or a control module) of the air conditioner, which is disposed in the air conditioner, for controlling various operations of the electric heater protection method of the air conditioner and implementing various functions. The processor for implementing the electric heater protection method of the air conditioner may be such as, but not limited to, one or more single-core or multi-core processors. The processor(s) may include any combination of general-purpose processors and special-purpose processors (e.g., graphics processors, application processors, etc.). The processor may be coupled thereto and/or may include a memory/storage device and may be configured to execute instructions stored in the memory/storage device to implement various applications and/or operating systems running on the controller in accordance with the present invention.
According to the scheme provided by the invention, the temperature sensing bulb in the air conditioner comprising the scheme of the invention is arranged at a reasonable position to realize the detection of the tube temperature, and simultaneously, the temperature of the auxiliary heating starting radiation of the electric heater can be detected; the low-cost electric heater protection method is provided, and the safety problem that the air conditioner is burnt due to dry burning of the electric heater is solved; when the electric heater which is out of work is judged and controlled to continuously work and dry-fire, namely, the temperature of the refrigerating pipe, the heating pipe or the standby pipe is not consistent with the preset temperature, the air-conditioning heat pump system is controlled by the master control to be switched into a refrigerating working mode, the fan continuously works, and the air-conditioning air deflector is in the maximum angle, so that heat can be conveniently emitted. The panel displays the fault state, the buzzer warns abnormally, the user can not operate the air conditioner, the air conditioner can not be shut down or standby, all remote controls are invalid, and the user can not power off the whole air conditioner unless the plug and the socket are manually disconnected. The air conditioner has a memory function, if the air conditioner is not reset by special operation, the state is still kept after the air conditioner is electrified again until after-sales maintenance is reset.
The drawings referred to above and the detailed description of the invention, which are exemplary of the invention, serve to explain the invention without limiting the meaning or scope of the invention as described in the claims. Accordingly, modifications may be readily made by those skilled in the art from the foregoing description. Further, those skilled in the art may delete some of the constituent elements described herein without deteriorating the performance, or may add other constituent elements to improve the performance. Further, the order of the steps of the methods described herein may be varied by one skilled in the art depending on the environment of the process or apparatus. Therefore, the scope of the present invention should be determined not by the embodiments described above but by the claims and their equivalents.
While the invention has been described in connection with what is presently considered to be practical embodiments, it is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (8)
1. A protection method for an electric heater of an air conditioner is characterized in that the air conditioner comprises a heat exchanger assembly; the heat exchanger assembly comprises a heat exchanger with an arc-shaped structure, an electric heater, a heat pump refrigerant circulation pipeline and a temperature sensing bulb; the method comprises the following steps:
detecting a target temperature value of the heat pump refrigerant circulation pipeline through the temperature sensing bulb;
judging whether the electric heater is in a dry-burning state or not based on the target temperature value;
if so, starting a dry-burning protection program to perform dry-burning protection on the electric heater according to the dry-burning protection program;
one side of the temperature sensing bulb is attached to the heat pump refrigerant circulation pipeline, and the other side of the temperature sensing bulb is exposed out of the inner side of the arc-shaped structure of the heat exchanger; the target temperature value of the heat pump refrigerant circulation pipeline is detected through the temperature sensing bulb, and the method comprises the following steps:
and acquiring a temperature value obtained by superposing the temperature value of the heat pump refrigerant circulation pipeline and the temperature value of the electric heater through the temperature sensing bulb, wherein the temperature value is used as a target temperature value of the heat pump refrigerant circulation pipeline.
2. The method of claim 1, wherein said determining whether the electric heater is in a dry-fire condition based on the target temperature value comprises:
acquiring an indoor environment temperature value of an indoor environment to which the air conditioner belongs;
acquiring a heat generator radiation increment value based on the indoor environment temperature value and a preset heat radiation increment relation between the environment temperature and the temperature of the pipe heated by the heat generator;
and comparing the target temperature value with the heater radiation increment value, and judging whether the electric heater is in a dry-burning state according to a comparison result.
3. The method of claim 2, wherein when the operation mode of the air conditioner is a cooling mode or a heating mode, the comparing the target temperature value with the heater radiation increment value and determining whether the electric heater is in a dry-fire state according to the comparison result comprises:
comparing the target temperature value with the sum of a preset normal temperature value and the radiator radiation increment value;
and if the target temperature value is greater than the sum of the normal temperature value and the heater radiation increment value, judging that the electric heater is in a dry-burning state.
4. The method of claim 2, wherein comparing the target temperature value with the heater radiation increment value when the operation mode of the air conditioner is a standby mode, and determining whether the electric heater is in a dry-fire state according to the comparison result comprises:
comparing the target temperature value to a sum of the indoor ambient temperature value and the heater radiation increment value;
and if the target temperature value is greater than the sum of the indoor environment temperature value and the heater radiation increment value, judging that the electric heater is in a dry-burning state.
5. The method of any one of claims 1-4, wherein the initiating a dry-fire protection program to dry-fire protect the electric heater according to the dry-fire protection program comprises:
starting a dry combustion protection program, and switching a heat pump system of the air conditioner into a refrigeration mode state;
adjusting an air deflector of the air conditioner to a maximum angle;
setting keys of a remote controller and a control panel of the air conditioner to be in a failure state, and sending fault prompt information;
the fault prompt information comprises sound prompt information and light prompt information.
6. An electric heater protection device of an air conditioner comprising one or more processors and a non-transitory computer readable storage medium storing program instructions which, when executed by the one or more processors, the one or more processors are configured to implement the method of any one of claims 1-5.
7. A non-transitory computer-readable storage medium having stored thereon program instructions which, when executed by one or more processors, are to implement the method of any one of claims 1-5.
8. An air conditioner employing the method of any one of claims 1-5, or comprising the apparatus of claim 6, or having the non-transitory computer-readable storage medium of claim 7.
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| CN113280493A (en) * | 2021-05-08 | 2021-08-20 | 珠海拓芯科技有限公司 | Electric heating control device, control method and air conditioner |
| CN113280471A (en) * | 2021-06-15 | 2021-08-20 | 珠海格力电器股份有限公司 | Dry-burning fault judgment method and device for air conditioner electric heater and air conditioner |
| CN113418273A (en) * | 2021-06-30 | 2021-09-21 | 珠海拓芯科技有限公司 | Electrical heating relay thermal fault detection method and air conditioner |
| CN113551370B (en) * | 2021-07-12 | 2022-07-26 | 珠海格力电器股份有限公司 | Dry burning detection method of air conditioner and air conditioner |
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