WO2024021396A1 - Air conditioner, and electric-heating protection system and method therefor - Google Patents

Air conditioner, and electric-heating protection system and method therefor Download PDF

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Publication number
WO2024021396A1
WO2024021396A1 PCT/CN2022/134140 CN2022134140W WO2024021396A1 WO 2024021396 A1 WO2024021396 A1 WO 2024021396A1 CN 2022134140 W CN2022134140 W CN 2022134140W WO 2024021396 A1 WO2024021396 A1 WO 2024021396A1
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WIPO (PCT)
Prior art keywords
air conditioner
fan
electric heater
protection
temperature
Prior art date
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PCT/CN2022/134140
Other languages
French (fr)
Chinese (zh)
Inventor
徐伟堂
杨建�
周坤
吴彬彬
周虎
徐振豪
Original Assignee
广东美的制冷设备有限公司
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Application filed by 广东美的制冷设备有限公司 filed Critical 广东美的制冷设备有限公司
Publication of WO2024021396A1 publication Critical patent/WO2024021396A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
    • 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
    • F24F11/38—Failure diagnosis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—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
    • F24F11/873—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling refrigerant heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F24F2110/30—Velocity
    • 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
    • F24F2110/50—Air quality properties
    • F24F2110/64—Airborne particle content
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present application relates to the technical field of air conditioners, specifically, to an air conditioner and its electric heating protection system and method.
  • Air conditioners regulate and control parameters such as temperature, humidity, and flow rate of ambient air in buildings or structures. , which meets people’s needs for the surrounding environment.
  • temperature protection is installed in the air conditioner.
  • a temperature sensor is provided to detect the temperature. When the temperature is higher than the set temperature, the operating power of the air conditioner is cut off.
  • the fire protection in the related art cannot protect the air conditioner when faced with situations such as the refrigerant being ignited, and only provides one layer of protection. Once the protection fails, the air conditioner cannot be protected, causing the air conditioner to Insufficient security.
  • the first purpose of this application is to propose an electric heating protection system for an air conditioner to improve the safety of the air conditioner.
  • the second purpose of this application is to propose an air conditioner.
  • the third purpose of this application is to propose an electric heating protection method for an air conditioner.
  • the first embodiment of the present application proposes an electric heating protection system for an air conditioner, which includes: a rotation speed detection unit for detecting the rotation speed of a fan; a control unit for detecting the rotation speed of a fan when the air conditioner is in heating operation and When the electric auxiliary heating function is turned on, if the fan is abnormal according to the fan speed, the electric heater of the air conditioner is controlled to be turned off to perform the first level of fire protection; a temperature protection unit, the temperature protection unit is connected in series with the The power supply circuit of the electric heater is used to disconnect the power supply circuit when the electric heater is over-temperature, so as to perform the second level of fire protection when the first level of fire protection function of the air conditioner fails.
  • a second embodiment of the present application provides an air conditioner including the above-mentioned electric heating protection system.
  • the third embodiment of the present application proposes an electric heating protection method for an air conditioner, which includes: when the air conditioner is running for heating and the electric auxiliary heating function is turned on, obtaining the fan speed; When the fan speed determines that the fan is abnormal, the electric heater of the air conditioner is controlled to be turned off to perform the first level of fire protection, and when the first level of fire protection function of the air conditioner fails, the electric heater is connected in series to The temperature protection unit in the power supply circuit disconnects the power supply circuit for the first level of fire protection.
  • the air conditioner and its electric heating protection system and method in the embodiments of the present application detect the fan speed and control the electric heater of the air conditioner to turn off when judging the fan abnormality based on the fan speed, thereby achieving the first level of fire protection and also protecting the electric power.
  • the power supply circuit is disconnected to achieve the second level of fire protection. This can achieve double fire protection for the air conditioner and effectively prevent the electric heater of the air conditioner from dry burning causing fire accidents, thereby improving the air conditioner. device security.
  • Figure 1 is a structural block diagram of an electric heating protection system of an air conditioner according to an embodiment of the present application
  • Figure 2 is a work flow chart of an electric heating protection system of an air conditioner according to an example of this application;
  • Figure 3 is a schematic diagram of an electric heating protection system of an air conditioner according to an example of this application.
  • FIG. 4 is a structural block diagram of the air conditioner according to the embodiment of the present application.
  • Figure 5 is a flow chart of the electric heating protection method of the air conditioner according to the embodiment of the present application.
  • Figure 1 is a structural block diagram of an electric heating protection system of an air conditioner according to an embodiment of the present application.
  • the electric heating protection system 100 of the air conditioner includes: a rotation speed detection unit 101 , a control unit 102 , and a temperature protection unit 103 .
  • the rotation speed detection unit 101 is used to detect the fan rotation speed;
  • the control unit 102 is used to control the electric heater of the air conditioner to turn off if the fan is abnormal according to the fan speed when the air conditioner is running for heating and the electric auxiliary heating function is turned on.
  • the temperature protection unit 103 is connected in series in the power supply circuit of the electric heater, and is used to disconnect the power supply circuit when the electric heater overheats, so that the air conditioner can When the primary fire protection function fails, the second level of fire protection is carried out.
  • the temperature of the electric heater will be very high when dry burning.
  • its surface temperature will be less than 550 degrees during normal wind operation. , but once it is dry-fired, the surface temperature will reach about 750-1100 degrees.
  • the high temperature when the electric heater is dry-burning will cause risks such as melting and fire in the air conditioner.
  • the air conditioner is equipped with a first level of fire protection through software protection and a second level of fire protection through hardware protection.
  • the fan of the air conditioner needs to be set up with speed feedback, including a DC fan with PG speed regulation or DC drive control. You can also set up corresponding sensors on the fan to detect the fan speed. .
  • the fan speed is detected through the speed detection unit 101, and when the fan speed is abnormal, such as blocked rotor, open circuit, etc., the fan abnormality can be determined based on the fan speed, so that the software can quickly identify the abnormality and control the electric heater to turn off. This effectively prevents the electric heater from dry burning. This provides the first level of fire protection.
  • the temperature protection unit 103 can be a protector such as a resettable thermostat or a fuse. Of course, it can also The temperature protection unit 103 can be configured to include multiple protectors for better fire protection.
  • the preset temperature threshold may be, for example, the ignition temperature of the refrigerant. In this way, fire protection can be carried out when the first level of fire protection fails and the electric heater burns dry.
  • control unit 102 and the temperature protection unit 103 can provide double fire protection for the air conditioner, effectively preventing fire accidents caused by dry burning of the electric heater of the air conditioner, thereby improving the safety of the air conditioner.
  • control unit 102 is also used to control the fan to turn on when the indoor temperature is lower than the first preset temperature, and to control the electric heater to turn on when the fan speed is greater than the first preset speed.
  • the air conditioner After performing the heating operation, the air conditioner enters the heating mode, and the control unit 102 obtains the indoor temperature and compares the indoor temperature with the first preset temperature. When the indoor temperature is lower than the first preset temperature, the control unit 102 first determines whether the fan is currently on. If the fan is not on, the fan is turned on.
  • the indoor temperature is greater than or equal to the first preset temperature, it is determined that heating is not currently required. At this time, it is necessary to determine whether the fan and electric heater are in operation, and to process the motor and electric heater based on the judgment results.
  • the electric heater if the electric heater is not in the running state, the electric heater will not be processed; if the electric heater is in the running state, the electric heater will be turned off.
  • the fan if the fan is not in the running state, the fan will not be processed; if the fan is in the running state, the air outlet temperature of the air conditioner is obtained, and if the air outlet temperature of the air conditioner is less than the third preset temperature, then Directly turn off the fan. If the air outlet temperature of the air conditioner is greater than or equal to the third preset temperature, it is determined that the air outlet temperature of the air conditioner is too high and the fan continues to run.
  • the electric heater is controlled to turn off, and the fan is controlled to turn off when the air outlet temperature of the air conditioner is less than the third preset temperature.
  • control unit 102 is not only used to provide the above-mentioned first level of fire protection for the air conditioner, but is also used to control the heating operation of the air conditioner. Furthermore, by combining the method of controlling the heating operation of the air conditioner and the The first level fire protection method of the air conditioner is integrated into a control unit 102, which can better reduce the cost of the air conditioner and improve the integration level of the air conditioner.
  • control unit 102 is also configured to determine that the fan is abnormal if the fan speed is less than a second preset speed during the operation of the fan and the electric heater, wherein the second preset speed is less than The first preset speed.
  • the electric heater is controlled to turn off. If it is detected that the air outlet temperature of the air conditioner is greater than the second preset temperature, it will also be determined that the fan is abnormal, such as the air inlet or the air outlet is blocked, making the current electric heater temperature too high, so the electric heater is turned off. Exit the current heating mode process. During the operation of the fan and electric heater, if the air outlet temperature of the air conditioner is less than or equal to the second preset temperature, the current heating mode process will be exited and the next cycle judgment process will be performed.
  • the fan After turning off the electric heater, it is determined whether the air outlet temperature of the air conditioner is less than the third preset temperature, and after it is determined that the air outlet temperature is less than the third preset temperature, the fan is turned off.
  • the first preset rotation speed Non is 800 rpm
  • the second preset rotation speed Noff is 700 rpm
  • the first preset time is 3s
  • the second preset time is 3s
  • the third preset temperature T5low is 30 Spend.
  • the air conditioner After entering the heating mode, the air conditioner obtains the indoor temperature T1 and determines whether the indoor temperature T1 is less than the first preset temperature Ts.
  • the fan is turned on, and it is determined whether the fan speed is greater than the first preset speed Non. When the fan speed is less than or equal to the first preset speed Non, the fan is controlled to continue running until the fan speed is greater than the first preset speed Non.
  • the electric heater is turned on after the fan runs for 3 seconds, so that both the fan and the electric heater are in running state. Then it is judged whether the fan speed is less than the second preset speed Noff. If the fan speed is less than the second preset speed Noff for 3 consecutive seconds, it is determined that the fan is abnormal, triggers the first level of fire protection, turns off the electric heater and exits the current heating mode process. . If the fan speed is greater than or equal to the second preset speed, then it is determined whether the air outlet temperature T5 of the air conditioner is greater than the second preset temperature T5high.
  • the air outlet temperature T5 of the air conditioner is greater than the second preset temperature T5high, the first Re-fire protection, turn off the electric heater and exit the current heating mode process. Subsequently, it is continued to determine whether the air outlet temperature T5 is lower than the third preset temperature T5low. If it is lower than the third preset temperature T5low, the fan is turned off.
  • the current heating mode process is exited and the next cycle is performed.
  • the indoor temperature T1 is greater than or equal to the first preset temperature Ts, it is determined whether the electric heater is in a running state. If the electric heater is in a running state, the electric heater is turned off. Furthermore, if the fan is running, it is determined whether the air outlet temperature T5 of the air conditioner is less than the third preset temperature T5low. If the air outlet temperature T5 is less than the third preset temperature T5low, the fan is turned off; if the air outlet temperature T5 is greater than or equal to the third preset temperature T5low. If the preset temperature is T5low, the fan will maintain the previous state. Further, exit the current heating mode process and proceed to the next cycle.
  • the temperature protection unit 103 includes a thermostat and a thermal fuse.
  • the thermostat and the thermal fuse are respectively connected in series on the power supply circuit, and the operating temperature of the thermostat is lower than the operating temperature of the thermal fuse.
  • the temperature protection unit 103 can be configured to include both a thermostat and a thermal fuse, so that after the first level of fire protection fails, the thermostat connected in series in the power supply circuit of the electric heater detects When the temperature is too high, the power supply circuit is cut off. Moreover, even if the temperature control fails, the thermal fuse can continue to work and disconnect the power supply circuit. Moreover, in a specific embodiment in which the temperature protection unit 103 includes both a thermostat and a thermal fuse, the operating temperature of the thermostat needs to be set lower than the operating temperature of the thermal fuse to prevent the fuse from operating first.
  • the electric heating protection system 100 of the air conditioner also includes: fire-proof metal parts.
  • the fire-proof metal parts define a fire-proof protection cavity suitable for installing the electric heater.
  • the fire-proof protection cavity is provided with an air outlet.
  • the air outlet is suitable for cooperating with the fan to discharge the hot air heated by the electric heater, and the fire-proof metal parts are used for third-level fire protection when the second-level fire protection function of the air conditioner fails.
  • a third layer of fire protection is also set up.
  • the electric heater is isolated by setting fireproof metal parts.
  • the first layer of fire protection and the second layer of fire protection fail, dry burning is avoided. If the temperature of the electric heater is too high, the surrounding structural parts will melt or catch fire. Moreover, if there is a refrigerant leakage, it can also prevent the leaked refrigerant from contacting the electric heater and causing a fire.
  • the triple protection can be seen in Figure 3.
  • the electric heater is an electric heating wire
  • the first level of fire protection is software protection.
  • the fan speed is obtained through a sensor, and software control is performed based on the fan speed. Protection; when the first level of fire protection fails, dual second level fire protection is provided through the thermostat and thermal fuse; when the second level of fire protection also fails, the isolation design is implemented through fireproof metal parts to achieve structural protection.
  • the safety of the air conditioner is further improved by providing triple fire protection for the air conditioner.
  • the fireproof metal part is a fireproof sheet metal part.
  • the electric heater is a resistance wire heater
  • the air conditioner uses R32 refrigerant.
  • the ignition point of R32 refrigerant is Above 700 degrees, in order to ensure that the refrigerant does not leak and reach the ignition point after the resistance wire heater is turned on, a control and protection system is needed to ensure that the resistance wire does not burn dry when refrigerant leaks to avoid causing a fire. and explosion hazards.
  • the electric heating protection system 100 of the above-mentioned air conditioner can be adapted to use resistance wire heaters as electric heaters and non-heat pump type window machines using R32 refrigerant, thereby improving the heating effect while meeting the latest regulatory requirements. and user experience.
  • the electric heating protection system of the air conditioner in the embodiment of the present application detects the fan speed and controls the electric heater of the air conditioner to turn off when it is judged that the fan is abnormal based on the fan speed, thereby achieving the first level of fire protection and also protecting the electric power.
  • the power supply circuit is disconnected to achieve the second level of fire protection. This can achieve double fire protection for the air conditioner and effectively prevent the electric heater of the air conditioner from dry burning causing fire accidents, thereby improving the air conditioner. device security.
  • there is still a third level of fire protection thereby further improving the safety of the air conditioner.
  • the cost of the air conditioner is further reduced and the integration level of the air conditioner is improved.
  • the electric heating protection system of the air conditioner according to the embodiment of the present application can be adapted to use resistance wire heaters as electric heaters and non-heat pump window machines using R32 refrigerant, which can improve heating while meeting the latest regulatory requirements. performance and user experience.
  • FIG. 4 is a structural block diagram of the air conditioner according to the embodiment of the present application.
  • the air conditioner 10 includes the above-mentioned electric heating protection system 100 of the air conditioner.
  • the air conditioner in the embodiment of the present application uses the above-mentioned electric heating protection system of the air conditioner to detect the fan speed, and when the fan abnormality is determined based on the fan speed, the electric heater of the air conditioner is controlled to turn off, thereby achieving the first level of fire protection. It also disconnects the power supply circuit when the electric heater overheats to achieve the second level of fire protection. This can achieve double fire protection for the air conditioner and effectively prevent the electric heater of the air conditioner from dry burning causing fire accidents. Thereby improving the safety of the air conditioner. Moreover, after the first level of fire protection and the second level of fire protection fail, there is still a third level of fire protection, thereby further improving the safety of the air conditioner.
  • the cost of the air conditioner is further reduced and the integration level of the air conditioner is improved.
  • the electric heating protection system of the air conditioner according to the embodiment of the present application can be adapted to use resistance wire heaters as electric heaters and non-heat pump window machines using R32 refrigerant, which can improve heating while meeting the latest regulatory requirements. performance and user experience.
  • this application proposes an electric heating protection method for an air conditioner.
  • Figure 5 is a flow chart of the electric heating protection method of the air conditioner according to the embodiment of the present application.
  • the electric heating protection methods of air conditioners include:
  • the electric heater of the air conditioner is controlled to be turned off for the first level of fire protection, and when the first level of fire protection function of the air conditioner fails, the power supply of the electric heater is connected in series.
  • the temperature protection unit in the loop disconnects the power supply loop for the first level of fire protection.
  • the temperature protection unit includes a thermostat and a thermal fuse.
  • the thermostat and the thermal fuse are respectively connected in series on the power supply circuit, and the operating temperature of the thermostat is lower than the operating temperature of the thermal fuse.
  • a third level of fire protection is also performed through fireproof metal parts, wherein the fireproof metal parts define a fire protection zone suitable for installing an electric heater.
  • the fire protection cavity is provided with an air outlet, which is suitable for cooperating with a fan to lead out the hot air heated by the electric heater.
  • the electric heating protection method of the air conditioner in the embodiment of the present application detects the fan speed and controls the electric heater of the air conditioner to turn off when it is judged that the fan is abnormal based on the fan speed, thereby achieving the first level of fire protection and preventing the occurrence of fires in the electric heater.
  • the power supply circuit is disconnected when overheating to achieve the second level of fire protection. This can achieve double fire protection for the air conditioner and effectively prevent the electric heater of the air conditioner from dry burning causing fire accidents, thereby improving the safety of the air conditioner. sex.
  • there is still a third level of fire protection thereby further improving the safety of the air conditioner.
  • the cost of the air conditioner is further reduced and the integration level of the air conditioner is improved.
  • the electric heating protection system of the air conditioner according to the embodiment of the present application can be adapted to use resistance wire heaters as electric heaters and non-heat pump window machines using R32 refrigerant, which can improve heating while meeting the latest regulatory requirements. performance and user experience.
  • a "computer-readable medium” may be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
  • Non-exhaustive list of computer readable media include the following: electrical connections with one or more wires (electronic device), portable computer disk cartridges (magnetic device), random access memory (RAM), Read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM).
  • the computer-readable medium may even be paper or other suitable medium on which the program may be printed, as the paper or other medium may be optically scanned, for example, and subsequently edited, interpreted, or otherwise suitable as necessary. process to obtain the program electronically and then store it in computer memory.
  • various parts of the present application can be implemented in hardware, software, firmware, or a combination thereof.
  • various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system.
  • a logic gate circuit with a logic gate circuit for implementing a logic function on a data signal.
  • Discrete logic circuits application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.
  • connection can It can be a fixed connection, or it can be a detachable connection, or it can be integrated. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be two The internal connection between components, or the interaction between two components.
  • connection can It can be a fixed connection, or it can be a detachable connection, or it can be integrated. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be two The internal connection between components, or the interaction between two components.
  • connection can be a fixed connection, or it can be a detachable connection, or it can be integrated. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be two The
  • a first feature being “on” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “below” and “beneath” the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

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Abstract

An air conditioner, and an electric-heating protection system and method therefor, which relate to the technical field of air conditioners. The electric-heating protection system for an air conditioner comprises: a rotation speed measurement unit, which is used for measuring the rotation speed of a fan; a control unit, which is used for controlling an electric heater of the air conditioner to shut down when an air conditioner is in a heating operation mode and has activated a function of additional electric heating and if it is determined, according to the rotation speed of the fan, that the fan is abnormal, such that first fire-prevention protection is performed; and a temperature protection unit, which is connected in series in a power supply loop of the electric heater and is used for disconnecting the power supply loop when an over-temperature problem occurs in the electric heater, such that second fire-prevention protection is performed when a first fire-prevention protection function for the air conditioner fails.

Description

空调器及其电加热保护***、方法Air conditioner and electric heating protection system and method thereof
相关申请的交叉引用Cross-references to related applications
本申请要求于2022年7月28日提交的申请号为202210897913.2，名称为“空调器及其电加热保护***、方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims priority to the Chinese patent application with application number 202210897913.2 and titled "Air conditioner and electric heating protection system and method" submitted on July 28, 2022, the entire content of which is incorporated into this application by reference.
技术领域Technical field
本申请涉及空调器技术领域，具体而言，涉及一种空调器及其电加热保护***、方法。The present application relates to the technical field of air conditioners, specifically, to an air conditioner and its electric heating protection system and method.
背景技术Background technique
随着社会的发展，人们的生活水平不断提高，空调器已经成为人们日常生活中必不可少的电器设备，空调器通过对建筑或构筑物内环境空气的温度、湿度、流速等参数进行调节和控制，满足了人们对于周围环境的需求。With the development of society and the continuous improvement of people's living standards, air conditioners have become indispensable electrical equipment in people's daily lives. Air conditioners regulate and control parameters such as temperature, humidity, and flow rate of ambient air in buildings or structures. , which meets people’s needs for the surrounding environment.
相关技术中，为了减少空调火灾事故的发生，在空调中设置了温度保护，通过设置温度传感器，利用温度传感器检测温度，当温度高于设定温度时，切断空调的工作电源。In the related art, in order to reduce the occurrence of air conditioner fire accidents, temperature protection is installed in the air conditioner. A temperature sensor is provided to detect the temperature. When the temperature is higher than the set temperature, the operating power of the air conditioner is cut off.
但是，相关技术中的防火保护，在面对如制冷剂被引燃之类的情况时，无法进行防护，且只进行了一重防护，一旦该防护失效便无法对空调器进行保护，使得空调器的安全性不足。However, the fire protection in the related art cannot protect the air conditioner when faced with situations such as the refrigerant being ignited, and only provides one layer of protection. Once the protection fails, the air conditioner cannot be protected, causing the air conditioner to Insufficient security.
公开内容public content
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请的第一个目的在于提出一种空调器的电加热保护***，以提高空调器的安全性。This application aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of this application is to propose an electric heating protection system for an air conditioner to improve the safety of the air conditioner.
本申请的第二个目的在于提出一种空调器。The second purpose of this application is to propose an air conditioner.
本申请的第三个目的在于提出一种空调器的电加热保护方法。The third purpose of this application is to propose an electric heating protection method for an air conditioner.
为达到上述目的，本申请第一方面实施例提出了一种空调器的电加热保护***，包括：转速检测单元，用于检测风机转速；控制单元，用于在所述空调器制热运行且开启电辅热功能时，如果根据所述风机转速判断风机异常，则控制所述空调器的电加热器关闭，以进行第一重防火保护；温度保护单元，所述温度保护单元串联在所述电加热器的供电回路中，用于在所述电加热器发生过温时断开所述供电回路，以便在所述空调器的第一重防火保护功能失效时进行第二重防火保护。In order to achieve the above object, the first embodiment of the present application proposes an electric heating protection system for an air conditioner, which includes: a rotation speed detection unit for detecting the rotation speed of a fan; a control unit for detecting the rotation speed of a fan when the air conditioner is in heating operation and When the electric auxiliary heating function is turned on, if the fan is abnormal according to the fan speed, the electric heater of the air conditioner is controlled to be turned off to perform the first level of fire protection; a temperature protection unit, the temperature protection unit is connected in series with the The power supply circuit of the electric heater is used to disconnect the power supply circuit when the electric heater is over-temperature, so as to perform the second level of fire protection when the first level of fire protection function of the air conditioner fails.
为达到上述目的，本申请第二方面实施例提出了一种空调器，包括上述的电加热保护***。In order to achieve the above object, a second embodiment of the present application provides an air conditioner including the above-mentioned electric heating protection system.
为达到上述目的，本申请第三方面实施例提出了一种空调器的电加热保护方法，包 括：在所述空调器制热运行且开启电辅热功能时，获取风机转速；在根据所述风机转速判断风机异常时，控制所述空调器的电加热器关闭，以进行第一重防火保护，并在所述空调器的第一重防火保护功能失效时，通过串联在所述电加热器的供电回路中的温度保护单元断开所述供电回路，以进行第一重防火保护。In order to achieve the above purpose, the third embodiment of the present application proposes an electric heating protection method for an air conditioner, which includes: when the air conditioner is running for heating and the electric auxiliary heating function is turned on, obtaining the fan speed; When the fan speed determines that the fan is abnormal, the electric heater of the air conditioner is controlled to be turned off to perform the first level of fire protection, and when the first level of fire protection function of the air conditioner fails, the electric heater is connected in series to The temperature protection unit in the power supply circuit disconnects the power supply circuit for the first level of fire protection.
本申请实施例的空调器及其电加热保护***、方法，通过检测风机转速，并在根据风机转速判断风机异常时，控制空调器的电加热器关闭，实现第一重防火保护，还在电加热器发生过温时断开供电回路，实现第二重防火保护，由此，可以实现对空调器进行双重防火保护，以及有效防止空调器的电加热器干烧导致着火事故发生，从而提高空调器的安全性。The air conditioner and its electric heating protection system and method in the embodiments of the present application detect the fan speed and control the electric heater of the air conditioner to turn off when judging the fan abnormality based on the fan speed, thereby achieving the first level of fire protection and also protecting the electric power. When the heater over-temperatures, the power supply circuit is disconnected to achieve the second level of fire protection. This can achieve double fire protection for the air conditioner and effectively prevent the electric heater of the air conditioner from dry burning causing fire accidents, thereby improving the air conditioner. device security.
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
附图说明Description of drawings
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:
图1是本申请一个实施例的空调器的电加热保护***的结构框图；Figure 1 is a structural block diagram of an electric heating protection system of an air conditioner according to an embodiment of the present application;
图2是本申请一个示例的空调器的电加热保护***的工作流程图；Figure 2 is a work flow chart of an electric heating protection system of an air conditioner according to an example of this application;
图3是本申请一个示例的空调器的电加热保护***的示意图；Figure 3 is a schematic diagram of an electric heating protection system of an air conditioner according to an example of this application;
图4是本申请实施例的空调器的结构框图；Figure 4 is a structural block diagram of the air conditioner according to the embodiment of the present application;
图5是本申请实施例的空调器的电加热保护方法的流程图。Figure 5 is a flow chart of the electric heating protection method of the air conditioner according to the embodiment of the present application.
具体实施方式Detailed ways
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.
下面参考附图描述本申请实施例的空调器及其电加热保护***、方法。The air conditioner and its electric heating protection system and method according to the embodiment of the present application will be described below with reference to the accompanying drawings.
图1是本申请一个实施例的空调器的电加热保护***的结构框图。Figure 1 is a structural block diagram of an electric heating protection system of an air conditioner according to an embodiment of the present application.
如图1所示，空调器的电加热保护***100包括：转速检测单元101、控制单元102、温度保护单元103。As shown in FIG. 1 , the electric heating protection system 100 of the air conditioner includes: a rotation speed detection unit 101 , a control unit 102 , and a temperature protection unit 103 .
其中，转速检测单元101，用于检测风机转速；控制单元102，用于在空调器制热运行且开启电辅热功能时，如果根据风机转速判断风机异常，则控制空调器的电加热器关闭，以进行第一重防火保护；温度保护单元103，温度保护单元103串联在电加热器的供电回路中，用于在电加热器发生过温时断开供电回路，以便在空调器的第一重防火保护功能失效时进行第二重防火保护。Among them, the rotation speed detection unit 101 is used to detect the fan rotation speed; the control unit 102 is used to control the electric heater of the air conditioner to turn off if the fan is abnormal according to the fan speed when the air conditioner is running for heating and the electric auxiliary heating function is turned on. , for the first level of fire protection; the temperature protection unit 103, the temperature protection unit 103 is connected in series in the power supply circuit of the electric heater, and is used to disconnect the power supply circuit when the electric heater overheats, so that the air conditioner can When the primary fire protection function fails, the second level of fire protection is carried out.
在空调器开启电辅热功能，通过电加热器进行加热时，由于电加热器在干烧时温度会很高，比如说，对于电阻丝加热器，其正常带风运行时表面温度小于550度，但一旦 干烧，表面温度便会达到750-1100度左右。电加热器干烧时的高温会导致空调器出现融化、起火等风险，比如说，对于采用R32制冷剂的空调器，由于R32制冷剂的燃点温度为相对较低的700度，一旦空调器的电加热器的温度超过700度，便存在引燃制冷剂的风险。因而，为了对空调器进行全方位、高性能的防护，对空调器设置包括通过软件进行保护的第一重防火保护和通过硬件进行保护的第二重防火保护。When the air conditioner turns on the electric auxiliary heating function and uses the electric heater for heating, the temperature of the electric heater will be very high when dry burning. For example, for a resistance wire heater, its surface temperature will be less than 550 degrees during normal wind operation. , but once it is dry-fired, the surface temperature will reach about 750-1100 degrees. The high temperature when the electric heater is dry-burning will cause risks such as melting and fire in the air conditioner. For example, for air conditioners using R32 refrigerant, since the ignition temperature of R32 refrigerant is a relatively low 700 degrees, once the air conditioner is If the temperature of the electric heater exceeds 700 degrees, there is a risk of igniting the refrigerant. Therefore, in order to provide comprehensive and high-performance protection for the air conditioner, the air conditioner is equipped with a first level of fire protection through software protection and a second level of fire protection through hardware protection.
为了实现上述第一重防火保护，需要设置空调器的风机为带转速反馈的风机，包括带PG调速或直流驱动控制直流风机等，也可在风机上自行设置相应的传感器以进行风机转速检测。通过转速检测单元101检测风机转速，并在风机转速异常，如出现堵转、开路不运行等情况时，可以根据风机转速判断风机异常，从而软件可以快读识别异常，并控制电加热器关闭，从而高效地防止电加热器干烧。由此，可以进行第一重防火保护。In order to achieve the first level of fire protection mentioned above, the fan of the air conditioner needs to be set up with speed feedback, including a DC fan with PG speed regulation or DC drive control. You can also set up corresponding sensors on the fan to detect the fan speed. . The fan speed is detected through the speed detection unit 101, and when the fan speed is abnormal, such as blocked rotor, open circuit, etc., the fan abnormality can be determined based on the fan speed, so that the software can quickly identify the abnormality and control the electric heater to turn off. This effectively prevents the electric heater from dry burning. This provides the first level of fire protection.
为了实现上述第二重防火保护，需要设置串联在电加热器的供电回路中的温度保护单元103，该温度保护单元103可以为如可复位温控器、熔断器之类保护器，当然，也可设置该温度保护单元103包括多个保护器，以更好地进行防火保护。当电加热器的温度超过预设温度阈值时，即可切断电加热器的供电回路。该预设温度阈值例如可以为制冷剂的燃点温度。由此，可以在第一重防火保护失效，电加热器干烧时，进行防火保护。In order to realize the second level of fire protection mentioned above, it is necessary to set up a temperature protection unit 103 connected in series in the power supply circuit of the electric heater. The temperature protection unit 103 can be a protector such as a resettable thermostat or a fuse. Of course, it can also The temperature protection unit 103 can be configured to include multiple protectors for better fire protection. When the temperature of the electric heater exceeds the preset temperature threshold, the power supply circuit of the electric heater can be cut off. The preset temperature threshold may be, for example, the ignition temperature of the refrigerant. In this way, fire protection can be carried out when the first level of fire protection fails and the electric heater burns dry.
由此，可以实现通过控制单元102与温度保护单元103对空调器进行双重防火保护，有效防止空调器的电加热器干烧导致着火事故发生，从而提高空调器的安全性。Thus, the control unit 102 and the temperature protection unit 103 can provide double fire protection for the air conditioner, effectively preventing fire accidents caused by dry burning of the electric heater of the air conditioner, thereby improving the safety of the air conditioner.
在本申请的一个实施例中，控制单元102还用于，在室内温度小于第一预设温度时，控制风机开启，并在风机转速大于第一预设转速时控制电加热器开启。In one embodiment of the present application, the control unit 102 is also used to control the fan to turn on when the indoor temperature is lower than the first preset temperature, and to control the electric heater to turn on when the fan speed is greater than the first preset speed.
在进行制热运行之后，空调器进入制热模式，控制单元102获取室内温度，并将室内温度与第一预设温度进行比较。在室内温度低于第一预设温度时，控制单元102首先判断当前风机是否处于开启状态，若风机处于未开启状态，则开启风机。After performing the heating operation, the air conditioner enters the heating mode, and the control unit 102 obtains the indoor temperature and compares the indoor temperature with the first preset temperature. When the indoor temperature is lower than the first preset temperature, the control unit 102 first determines whether the fan is currently on. If the fan is not on, the fan is turned on.
判断风机的转速是否大于第一预设转速，若风机的转速小于等于第一预设转速，则风机继续运行；若风机的转速大于第一预设转速，且电加热器处于未运行状态，则在第一预设时间之后开启电加热器。Determine whether the speed of the fan is greater than the first preset speed. If the speed of the fan is less than or equal to the first preset speed, the fan continues to run; if the speed of the fan is greater than the first preset speed and the electric heater is not running, then Turn on the electric heater after the first preset time.
如若检测到室内温度大于等于第一预设温度，则判断当前不需要加热。此时，需要判断风机、电加热器是否处于运行状态，并根据判断结果对电机、电加热器进行处理。If it is detected that the indoor temperature is greater than or equal to the first preset temperature, it is determined that heating is not currently required. At this time, it is necessary to determine whether the fan and electric heater are in operation, and to process the motor and electric heater based on the judgment results.
对于针对电加热器的判断处理，若电加热器不处于运行状态，则不对电加热器进行处理；若电加热器处于运行状态，则关闭电加热器。Regarding the judgment processing for the electric heater, if the electric heater is not in the running state, the electric heater will not be processed; if the electric heater is in the running state, the electric heater will be turned off.
对于针对风机的判断处理，若风机不处于运行状态，则不对风机进行处理；若风机处于运行状态，则获取空调器的出风口温度，若空调器的出风口温度小于第三预设温度，则直接关闭风机，若空调器的出风口温度大于或等于第三预设温度，则确定空调器的出风口温度过高，风机继续运行。For the judgment processing of the fan, if the fan is not in the running state, the fan will not be processed; if the fan is in the running state, the air outlet temperature of the air conditioner is obtained, and if the air outlet temperature of the air conditioner is less than the third preset temperature, then Directly turn off the fan. If the air outlet temperature of the air conditioner is greater than or equal to the third preset temperature, it is determined that the air outlet temperature of the air conditioner is too high and the fan continues to run.
其中，在风机和电加热器的运行过程中，如果室内温度大于等于第一预设温度，则控制电加热器关闭，并在空调器的出风口温度小于第三预设温度时控制风机关闭。During the operation of the fan and the electric heater, if the indoor temperature is greater than or equal to the first preset temperature, the electric heater is controlled to turn off, and the fan is controlled to turn off when the air outlet temperature of the air conditioner is less than the third preset temperature.
在对电加热器、风机均进行了判断处理之后，退出当前的制热模式处理，进行下一 个循环判断处理。After judging and processing the electric heater and fan, exit the current heating mode processing and proceed to the next cycle judgment processing.
由此，可以实现控制单元102不但用于对空调器进行上述第一重防火保护，还用于对空调器的制热运行进行控制，而且，通过将控制空调器的制热运行的方法和对空调器进行第一重防火保护的方法集成在一个控制单元102内，可以更好地降低空调器的成本，提高空调器的集成度。Thus, it can be realized that the control unit 102 is not only used to provide the above-mentioned first level of fire protection for the air conditioner, but is also used to control the heating operation of the air conditioner. Furthermore, by combining the method of controlling the heating operation of the air conditioner and the The first level fire protection method of the air conditioner is integrated into a control unit 102, which can better reduce the cost of the air conditioner and improve the integration level of the air conditioner.
在本申请的一个实施例中，控制单元102还用于，在风机和电加热器的运行过程中，如果风机转速小于第二预设转速，则确定风机异常，其中，第二预设转速小于第一预设转速。In one embodiment of the present application, the control unit 102 is also configured to determine that the fan is abnormal if the fan speed is less than a second preset speed during the operation of the fan and the electric heater, wherein the second preset speed is less than The first preset speed.
需要说明的是，在判断风机是否异常时，可以判断风机转速是否在第二预设时间内均小于第二预设转速，若在整个第二预设时间内风机转速均小于第二预设转速，则确定风机异常，关闭电加热器。It should be noted that when judging whether the fan is abnormal, it can be judged whether the fan speed is less than the second preset speed within the second preset time. If the fan speed is less than the second preset speed during the entire second preset time, , then it is determined that the fan is abnormal and the electric heater is turned off.
还需要说明的是，在风机和电加热器的运行过程中，如果风机转速大于等于第二预设转速，则在空调器的出风口温度大于第二预设温度时，控制电加热器关闭。由于如若检测到空调器的出风口温度大于第二预设温度，则同样判断风机出现异常，如进风或出风口有堵转情况，使得当前电加热器温度过高，因而关闭电加热器，退出当前的制热模式处理。在风机和电加热器的运行过程中，如若空调器的出风口温度小于等于第二预设温度，则退出当前的制热模式处理，进行下一个循环判断处理。It should also be noted that during the operation of the fan and the electric heater, if the fan speed is greater than or equal to the second preset speed, when the air outlet temperature of the air conditioner is greater than the second preset temperature, the electric heater is controlled to turn off. If it is detected that the air outlet temperature of the air conditioner is greater than the second preset temperature, it will also be determined that the fan is abnormal, such as the air inlet or the air outlet is blocked, making the current electric heater temperature too high, so the electric heater is turned off. Exit the current heating mode process. During the operation of the fan and electric heater, if the air outlet temperature of the air conditioner is less than or equal to the second preset temperature, the current heating mode process will be exited and the next cycle judgment process will be performed.
在关闭电加热器之后，判断空调器的出风口温度是否小于第三预设温度，并在确定出风口温度小于第三预设温度之后，关闭风机。After turning off the electric heater, it is determined whether the air outlet temperature of the air conditioner is less than the third preset temperature, and after it is determined that the air outlet temperature is less than the third preset temperature, the fan is turned off.
下面结合图2所示的具体示例对本申请实施例进行详细说明。The embodiments of the present application will be described in detail below with reference to the specific example shown in FIG. 2 .
在该具体示例中，第一预设转速Non为800转，第二预设转速Noff为700转，第一预设时间为3s，第二预设时间为3s，第三预设温度T5low为30度。In this specific example, the first preset rotation speed Non is 800 rpm, the second preset rotation speed Noff is 700 rpm, the first preset time is 3s, the second preset time is 3s, and the third preset temperature T5low is 30 Spend.
在进入制热模式之后，空调器获取室内温度T1，并判断室内温度T1是否小于第一预设温度Ts。After entering the heating mode, the air conditioner obtains the indoor temperature T1 and determines whether the indoor temperature T1 is less than the first preset temperature Ts.
若室内温度T1小于第一预设温度Ts，则开启风机，并判断风机转速是否大于第一预设转速Non。在风机转速小于等于第一预设转速Non时，控制风机继续运行，直至风机转速大于第一预设转速Non。If the indoor temperature T1 is lower than the first preset temperature Ts, the fan is turned on, and it is determined whether the fan speed is greater than the first preset speed Non. When the fan speed is less than or equal to the first preset speed Non, the fan is controlled to continue running until the fan speed is greater than the first preset speed Non.
在风机转速大于第一预设转速Non之后，风机运行3s后开启电加热器，使风机和电加热器均处于运行状态。进而判断风机转速是否小于第二预设转速，若连续3s风机转速均小于第二预设转速Noff，则确定风机异常，触发第一重防火保护，关闭电加热器并退出当前的制热模式处理。若风机转速大于等于第二预设转速，则再判断空调器的出风口温度T5是否大于第二预设温度T5high，若空调器的出风口温度T5大于第二预设温度T5high，则触发第一重防火保护，关闭电加热器并退出当前的制热模式处理。后续继续判断出风口温度T5是否小于第三预设温度T5low，若小于，则关闭风机。After the fan speed is greater than the first preset speed Non, the electric heater is turned on after the fan runs for 3 seconds, so that both the fan and the electric heater are in running state. Then it is judged whether the fan speed is less than the second preset speed Noff. If the fan speed is less than the second preset speed Noff for 3 consecutive seconds, it is determined that the fan is abnormal, triggers the first level of fire protection, turns off the electric heater and exits the current heating mode process. . If the fan speed is greater than or equal to the second preset speed, then it is determined whether the air outlet temperature T5 of the air conditioner is greater than the second preset temperature T5high. If the air outlet temperature T5 of the air conditioner is greater than the second preset temperature T5high, the first Re-fire protection, turn off the electric heater and exit the current heating mode process. Subsequently, it is continued to determine whether the air outlet temperature T5 is lower than the third preset temperature T5low. If it is lower than the third preset temperature T5low, the fan is turned off.
若风机转速大于等于第二预设转速Noff，且出风口温度小于等于第二预设温度T5high，则退出当前的制热模式处理，进行下一次循环。If the fan speed is greater than or equal to the second preset speed Noff, and the air outlet temperature is less than or equal to the second preset temperature T5high, the current heating mode process is exited and the next cycle is performed.
若室内温度T1大于等于第一预设温度Ts，则判断电加热器是否处于运行状态，若电加热器处于运行状态，则关闭电加热器。进而若风机处于运行状态，则判断空调器的出风口温度T5是否小于第三预设温度T5low，若出风口温度T5小于第三预设温度T5low，则关闭风机；若出风口温度T5大于等于第三预设温度T5low，则风机保持之前的状态。进一步的，退出当前的制热模式处理，进行下一次循环。If the indoor temperature T1 is greater than or equal to the first preset temperature Ts, it is determined whether the electric heater is in a running state. If the electric heater is in a running state, the electric heater is turned off. Furthermore, if the fan is running, it is determined whether the air outlet temperature T5 of the air conditioner is less than the third preset temperature T5low. If the air outlet temperature T5 is less than the third preset temperature T5low, the fan is turned off; if the air outlet temperature T5 is greater than or equal to the third preset temperature T5low. If the preset temperature is T5low, the fan will maintain the previous state. Further, exit the current heating mode process and proceed to the next cycle.
由此，可以通过判断风机转速和出风口温度，实现双重的第一重防火保护，进一步提高防火保护能力，且通过上述方法，将控制空调器进行制热运行的流程和进行第一重防火保护的流程整合为一个整体，进一步降低空调器的成本，提高空调器的集成度。Therefore, by judging the fan speed and air outlet temperature, dual first-level fire protection can be achieved, further improving the fire protection capability, and through the above method, the process of controlling the heating operation of the air conditioner and performing the first-level fire protection can be achieved The processes are integrated into a whole, further reducing the cost of the air conditioner and improving the integration of the air conditioner.
在本申请的一个实施例中，温度保护单元103包括温控器和热熔断器，温控器和热熔断器分别串联在供电回路，且温控器的动作温度小于热熔断器的动作温度。In one embodiment of the present application, the temperature protection unit 103 includes a thermostat and a thermal fuse. The thermostat and the thermal fuse are respectively connected in series on the power supply circuit, and the operating temperature of the thermostat is lower than the operating temperature of the thermal fuse.
对于上述第二重防火保护，可以设置该温度保护单元103同时包括温控器和热熔断器，从而在第一重防火保护失效之后，串联在电加热器的供电回路中的温控器在检测到温度过高时切断供电回路，而且，即使温控制失效，热熔断器也可继续工作，断开供电回路。而且，在该温度保护单元103同时包括温控器和热熔断器的具体实施例中，需要设置温控器的动作温度小于热熔断器的动作温度，以避免熔断器先工作。For the above-mentioned second level of fire protection, the temperature protection unit 103 can be configured to include both a thermostat and a thermal fuse, so that after the first level of fire protection fails, the thermostat connected in series in the power supply circuit of the electric heater detects When the temperature is too high, the power supply circuit is cut off. Moreover, even if the temperature control fails, the thermal fuse can continue to work and disconnect the power supply circuit. Moreover, in a specific embodiment in which the temperature protection unit 103 includes both a thermostat and a thermal fuse, the operating temperature of the thermostat needs to be set lower than the operating temperature of the thermal fuse to prevent the fuse from operating first.
由此，提出了一种简单高效的方法进行第二重防火保护。Therefore, a simple and efficient method for the second level of fire protection is proposed.
在本申请的一个实施例中，空调器的电加热保护***100还包括：防火金属件，防火金属件限定出适于安装电加热器的防火保护腔，防火保护腔上设有过风口，过风口适于与风机配合，以将经过电加热器加热后的热风导出，防火金属件用于在空调器的第二重防火保护功能失效时进行第三重防火保护。In one embodiment of the present application, the electric heating protection system 100 of the air conditioner also includes: fire-proof metal parts. The fire-proof metal parts define a fire-proof protection cavity suitable for installing the electric heater. The fire-proof protection cavity is provided with an air outlet. The air outlet is suitable for cooperating with the fan to discharge the hot air heated by the electric heater, and the fire-proof metal parts are used for third-level fire protection when the second-level fire protection function of the air conditioner fails.
为了实现更好地防火保护能力，还设置了第三重防火保护，通过设置防火金属件将电加热器隔离，在上述第一重防火保护和第二重防火保护均失效时，避免干烧的电加热器温度过高导致周边的结构件融化或起火，而且，如若出现制冷剂泄漏的情况，也可避免泄漏的制冷剂接触到电加热器造成起火。在一个具体示例中，该三重防护可以参见图3，在该具体示例中，电加热器为电热丝，第一重防火保护为软件保护，通过传感器获取风机转速，根据风机转速进行软件控制以进行保护；在第一重防火保护失效时，通过温控器和热熔断器进行双重地第二重防火保护；在第二重防火保护也失效时，通过防火金属件进行隔离设计，实现结构防护。In order to achieve better fire protection capabilities, a third layer of fire protection is also set up. The electric heater is isolated by setting fireproof metal parts. When the above-mentioned first layer of fire protection and the second layer of fire protection fail, dry burning is avoided. If the temperature of the electric heater is too high, the surrounding structural parts will melt or catch fire. Moreover, if there is a refrigerant leakage, it can also prevent the leaked refrigerant from contacting the electric heater and causing a fire. In a specific example, the triple protection can be seen in Figure 3. In this specific example, the electric heater is an electric heating wire, and the first level of fire protection is software protection. The fan speed is obtained through a sensor, and software control is performed based on the fan speed. Protection; when the first level of fire protection fails, dual second level fire protection is provided through the thermostat and thermal fuse; when the second level of fire protection also fails, the isolation design is implemented through fireproof metal parts to achieve structural protection.
由此，通过对空调器进行三重防火保护，进一步提高空调器的安全性。As a result, the safety of the air conditioner is further improved by providing triple fire protection for the air conditioner.
在本申请的一个实施例中，防火金属件为防火钣金件。In one embodiment of the present application, the fireproof metal part is a fireproof sheet metal part.
在本申请的一个实施例中，电加热器为电阻丝加热器，空调器采用R32制冷剂。In one embodiment of the present application, the electric heater is a resistance wire heater, and the air conditioner uses R32 refrigerant.
非热泵型窗机机型匹配R410制冷剂时，由于R410燃点远高于电热丝表面温度，因此，不存在起火和***的风险。但在北美最新法规要求后续使用R32制冷剂，因此为避免R32制冷剂的燃点较低问题，需要改用PTC(Positive Temperature Coefficient，正温度系数)发热方式等避免制冷剂泄露时产生起火的隐患。但是，PTC发热方式存在明显缺陷，即制热效果和体验感远比电热丝差。因此，为提升制热效果和用户体验，采 用电阻丝加热器，由于电阻丝正常带风运行时表面温度小于550度，但干烧时表面温度在750-1100度左右，R32制冷剂的燃点为700度以上，为保证在电阻丝加热器开启后不出现制冷剂泄露达到燃点的情况，因此需要一种控制保护***，保障制冷剂泄露的情况下电阻丝不处于干烧情况，以避免引起起火和***等危险。When a non-heat pump window machine is matched with R410 refrigerant, since the ignition point of R410 is much higher than the surface temperature of the electric heating wire, there is no risk of fire or explosion. However, the latest regulations in North America require the subsequent use of R32 refrigerant. Therefore, in order to avoid the problem of low ignition point of R32 refrigerant, it is necessary to switch to PTC (Positive Temperature Coefficient, positive temperature coefficient) heating method to avoid the risk of fire when refrigerant leaks. However, there are obvious flaws in the PTC heating method, that is, the heating effect and experience are far worse than those of electric heating wires. Therefore, in order to improve the heating effect and user experience, a resistance wire heater is used. Since the surface temperature of the resistance wire is less than 550 degrees when running normally with wind, but the surface temperature is around 750-1100 degrees during dry burning, the ignition point of R32 refrigerant is Above 700 degrees, in order to ensure that the refrigerant does not leak and reach the ignition point after the resistance wire heater is turned on, a control and protection system is needed to ensure that the resistance wire does not burn dry when refrigerant leaks to avoid causing a fire. and explosion hazards.
也就是说，上述空调器的电加热保护***100可以适配电加热器为电阻丝加热器，以及采用R32制冷剂的非热泵型窗机，从而在满足最新法规要求的同时，提高制热效果和用户体验。That is to say, the electric heating protection system 100 of the above-mentioned air conditioner can be adapted to use resistance wire heaters as electric heaters and non-heat pump type window machines using R32 refrigerant, thereby improving the heating effect while meeting the latest regulatory requirements. and user experience.
综上，本申请实施例的空调器的电加热保护***，通过检测风机转速，并在根据风机转速判断风机异常时，控制空调器的电加热器关闭，实现第一重防火保护，还在电加热器发生过温时断开供电回路，实现第二重防火保护，由此，可以实现对空调器进行双重防火保护，以及有效防止空调器的电加热器干烧导致着火事故发生，从而提高空调器的安全性。而且，在第一重防火保护和第二重防火保护均失效之后，还存在第三重防火保护，从而进一步提高空调器的安全性。而且，通过将控制空调器进行制热运行的流程和进行第一重防火保护的流程整合为一个整体，进一步降低空调器的成本，提高空调器的集成度。而且，本申请实施例的空调器的电加热保护***，可以适配电加热器为电阻丝加热器，以及采用R32制冷剂的非热泵型窗机，在满足最新法规要求的同时，提高制热效果和用户体验。In summary, the electric heating protection system of the air conditioner in the embodiment of the present application detects the fan speed and controls the electric heater of the air conditioner to turn off when it is judged that the fan is abnormal based on the fan speed, thereby achieving the first level of fire protection and also protecting the electric power. When the heater over-temperatures, the power supply circuit is disconnected to achieve the second level of fire protection. This can achieve double fire protection for the air conditioner and effectively prevent the electric heater of the air conditioner from dry burning causing fire accidents, thereby improving the air conditioner. device security. Moreover, after the first level of fire protection and the second level of fire protection fail, there is still a third level of fire protection, thereby further improving the safety of the air conditioner. Moreover, by integrating the process of controlling the heating operation of the air conditioner and the process of performing the first level of fire protection into a whole, the cost of the air conditioner is further reduced and the integration level of the air conditioner is improved. Moreover, the electric heating protection system of the air conditioner according to the embodiment of the present application can be adapted to use resistance wire heaters as electric heaters and non-heat pump window machines using R32 refrigerant, which can improve heating while meeting the latest regulatory requirements. performance and user experience.
进一步地，本申请提出一种空调器。Further, this application proposes an air conditioner.
图4是本申请实施例的空调器的结构框图。Figure 4 is a structural block diagram of the air conditioner according to the embodiment of the present application.
如图4所示，空调器10包括上述的空调器的电加热保护***100。As shown in FIG. 4 , the air conditioner 10 includes the above-mentioned electric heating protection system 100 of the air conditioner.
本申请实施例的空调器，通过上述的空调器的电加热保护***，通过检测风机转速，并在根据风机转速判断风机异常时，控制空调器的电加热器关闭，实现第一重防火保护，还在电加热器发生过温时断开供电回路，实现第二重防火保护，由此，可以实现对空调器进行双重防火保护，以及有效防止空调器的电加热器干烧导致着火事故发生，从而提高空调器的安全性。而且，在第一重防火保护和第二重防火保护均失效之后，还存在第三重防火保护，从而进一步提高空调器的安全性。而且，通过将控制空调器进行制热运行的流程和进行第一重防火保护的流程整合为一个整体，进一步降低空调器的成本，提高空调器的集成度。而且，本申请实施例的空调器的电加热保护***，可以适配电加热器为电阻丝加热器，以及采用R32制冷剂的非热泵型窗机，在满足最新法规要求的同时，提高制热效果和用户体验。The air conditioner in the embodiment of the present application uses the above-mentioned electric heating protection system of the air conditioner to detect the fan speed, and when the fan abnormality is determined based on the fan speed, the electric heater of the air conditioner is controlled to turn off, thereby achieving the first level of fire protection. It also disconnects the power supply circuit when the electric heater overheats to achieve the second level of fire protection. This can achieve double fire protection for the air conditioner and effectively prevent the electric heater of the air conditioner from dry burning causing fire accidents. Thereby improving the safety of the air conditioner. Moreover, after the first level of fire protection and the second level of fire protection fail, there is still a third level of fire protection, thereby further improving the safety of the air conditioner. Moreover, by integrating the process of controlling the heating operation of the air conditioner and the process of performing the first level of fire protection into a whole, the cost of the air conditioner is further reduced and the integration level of the air conditioner is improved. Moreover, the electric heating protection system of the air conditioner according to the embodiment of the present application can be adapted to use resistance wire heaters as electric heaters and non-heat pump window machines using R32 refrigerant, which can improve heating while meeting the latest regulatory requirements. performance and user experience.
进一步地，本申请提出一种空调器的电加热保护方法。Furthermore, this application proposes an electric heating protection method for an air conditioner.
图5是本申请实施例的空调器的电加热保护方法的流程图。Figure 5 is a flow chart of the electric heating protection method of the air conditioner according to the embodiment of the present application.
如图5所示，空调器的电加热保护方法包括：As shown in Figure 5, the electric heating protection methods of air conditioners include:
S51，在空调器制热运行且开启电辅热功能时，获取风机转速。S51, when the air conditioner is running for heating and the electric auxiliary heating function is turned on, obtain the fan speed.
S52，在根据风机转速判断风机异常时，控制空调器的电加热器关闭，以进行第一重防火保护，并在空调器的第一重防火保护功能失效时，通过串联在电加热器的供电回 路中的温度保护单元断开供电回路，以进行第一重防火保护。S52, when the fan abnormality is judged based on the fan speed, the electric heater of the air conditioner is controlled to be turned off for the first level of fire protection, and when the first level of fire protection function of the air conditioner fails, the power supply of the electric heater is connected in series. The temperature protection unit in the loop disconnects the power supply loop for the first level of fire protection.
在本申请的一个实施例中，温度保护单元包括温控器和热熔断器，温控器和热熔断器分别串联在供电回路，且温控器的动作温度小于热熔断器的动作温度。In one embodiment of the present application, the temperature protection unit includes a thermostat and a thermal fuse. The thermostat and the thermal fuse are respectively connected in series on the power supply circuit, and the operating temperature of the thermostat is lower than the operating temperature of the thermal fuse.
在本申请的一个实施例中，在空调器的第二重防火保护功能失效时，还通过防火金属件进行第三重防火保护，其中，防火金属件限定出适于安装电加热器的防火保护腔，防火保护腔上设有过风口，过风口适于与风机配合，以将经过电加热器加热后的热风导出。In one embodiment of the present application, when the second level of fire protection function of the air conditioner fails, a third level of fire protection is also performed through fireproof metal parts, wherein the fireproof metal parts define a fire protection zone suitable for installing an electric heater. The fire protection cavity is provided with an air outlet, which is suitable for cooperating with a fan to lead out the hot air heated by the electric heater.
需要说明的是，本申请实施例的空调器的电加热保护方法的其他具体实施方式，可以参见上述的空调器额电加热保护装置。It should be noted that for other specific implementations of the electric heating protection method for an air conditioner according to the embodiment of the present application, please refer to the above-mentioned electric heating protection device for an air conditioner.
本申请实施例的空调器的电加热保护方法，通过检测风机转速，并在根据风机转速判断风机异常时，控制空调器的电加热器关闭，实现第一重防火保护，还在电加热器发生过温时断开供电回路，实现第二重防火保护，由此，可以实现对空调器进行双重防火保护，以及有效防止空调器的电加热器干烧导致着火事故发生，从而提高空调器的安全性。而且，在第一重防火保护和第二重防火保护均失效之后，还存在第三重防火保护，从而进一步提高空调器的安全性。而且，通过将控制空调器进行制热运行的流程和进行第一重防火保护的流程整合为一个整体，进一步降低空调器的成本，提高空调器的集成度。而且，本申请实施例的空调器的电加热保护***，可以适配电加热器为电阻丝加热器，以及采用R32制冷剂的非热泵型窗机，在满足最新法规要求的同时，提高制热效果和用户体验。The electric heating protection method of the air conditioner in the embodiment of the present application detects the fan speed and controls the electric heater of the air conditioner to turn off when it is judged that the fan is abnormal based on the fan speed, thereby achieving the first level of fire protection and preventing the occurrence of fires in the electric heater. The power supply circuit is disconnected when overheating to achieve the second level of fire protection. This can achieve double fire protection for the air conditioner and effectively prevent the electric heater of the air conditioner from dry burning causing fire accidents, thereby improving the safety of the air conditioner. sex. Moreover, after the first level of fire protection and the second level of fire protection fail, there is still a third level of fire protection, thereby further improving the safety of the air conditioner. Moreover, by integrating the process of controlling the heating operation of the air conditioner and the process of performing the first level of fire protection into a whole, the cost of the air conditioner is further reduced and the integration level of the air conditioner is improved. Moreover, the electric heating protection system of the air conditioner according to the embodiment of the present application can be adapted to use resistance wire heaters as electric heaters and non-heat pump window machines using R32 refrigerant, which can improve heating while meeting the latest regulatory requirements. performance and user experience.
需要说明的是，在流程图中表示或在此以其他方式描述的逻辑和/或步骤，例如，可以被认为是用于实现逻辑功能的可执行指令的定序列表，可以具体实现在任何计算机可读介质中，以供指令执行***、装置或设备(如基于计算机的***、包括处理器的***或其他可以从指令执行***、装置或设备取指令并执行指令的***)使用，或结合这些指令执行***、装置或设备而使用。就本说明书而言，“计算机可读介质”可以是任何可以包含、存储、通信、传播或传输程序以供指令执行***、装置或设备或结合这些指令执行***、装置或设备而使用的装置。计算机可读介质的更具体的示例(非穷尽性列表)包括以下：具有一个或多个布线的电连接部(电子装置)，便携式计算机盘盒(磁装置)，随机存取存储器(RAM)，只读存储器(ROM)，可擦除可编辑只读存储器(EPROM或闪速存储器)，光纤装置，以及便携式光盘只读存储器(CDROM)。另外，计算机可读介质甚至可以是可在其上打印所述程序的纸或其他合适的介质，因为可以例如通过对纸或其他介质进行光学扫描，接着进行编辑、解译或必要时以其他合适方式进行处理来以电子方式获得所述程序，然后将其存储在计算机存储器中。It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered to be a sequenced list of executable instructions for implementing logical functions, which may be embodied in any computer. in a readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can retrieve and execute instructions from the instruction execution system, apparatus, or device) Used by instruction execution systems, devices or equipment. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections with one or more wires (electronic device), portable computer disk cartridges (magnetic device), random access memory (RAM), Read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium may even be paper or other suitable medium on which the program may be printed, as the paper or other medium may be optically scanned, for example, and subsequently edited, interpreted, or otherwise suitable as necessary. process to obtain the program electronically and then store it in computer memory.
应当理解，本申请的各部分可以用硬件、软件、固件或它们的组合来实现。在上述实施方式中，多个步骤或方法可以用存储在存储器中且由合适的指令执行***执行的软件或固件来实现。例如，如果用硬件来实现，和在另一实施方式中一样，可用本领域公知的下列技术中的任一项或他们的组合来实现：具有用于对数据信号实现逻辑功能的逻 辑门电路的离散逻辑电路，具有合适的组合逻辑门电路的专用集成电路，可编程门阵列(PGA)，现场可编程门阵列(FPGA)等。It should be understood that various parts of the present application can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented in hardware, as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: a logic gate circuit with a logic gate circuit for implementing a logic function on a data signal. Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。In the description of this application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis", The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply the device or element to which it refers. Must have a specific orientation, be constructed and operate in a specific orientation and therefore should not be construed as a limitation on this application.
此外，本申请实施例中所使用的“第一”、“第二”等术语，仅用于描述目的，而不可以理解为指示或者暗示相对重要性，或者隐含指明本实施例中所指示的技术特征数量。由此，本申请实施例中限定有“第一”、“第二”等术语的特征，可以明确或者隐含地表示该实施例中包括至少一个该特征。在本申请的描述中，词语“多个”的含义是至少两个或者两个及以上，例如两个、三个、四个等，除非实施例中另有明确具体的限定。In addition, terms such as “first” and “second” used in the embodiments of this application are only used for descriptive purposes and may not be understood as indicating or implying relative importance, or implicitly indicating what is indicated in this embodiment. number of technical features. Therefore, features defined by terms such as “first” and “second” in the embodiments of this application may explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of this application, the word "plurality" means at least two or two and more, such as two, three, four, etc., unless otherwise clearly and specifically limited in the embodiment.
在本申请中，除非实施例中另有明确的相关规定或者限定，否则实施例中出现的术语“安装”、“相连”、“连接”和“固定”等应做广义理解，例如，连接可以是固定连接，也可以是可拆卸连接，或成一体，可以理解的，也可以是机械连接、电连接等；当然，还可以是直接相连，或者通过中间媒介进行间接连接，或者可以是两个元件内部的连通，或者两个元件的相互作用关系。对于本领域的普通技术人员而言，能够根据具体的实施情况理解上述术语在本申请中的具体含义。In this application, unless there are other clear relevant provisions or limitations in the embodiments, the terms "installation", "connection", "connection" and "fixing" appearing in the embodiments should be understood in a broad sense. For example, connection can It can be a fixed connection, or it can be a detachable connection, or it can be integrated. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be two The internal connection between components, or the interaction between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific implementation conditions.
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。In this application, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.
尽管上面已经示出和描述了本申请的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本申请的限制，本领域的普通技术人员在本申请的范围内可以对上述实施例进行变化、修改、替换和变型。Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and cannot be understood as limitations of the present application. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and variations.

Claims (13)

  1. 一种空调器的电加热保护***，包括：An electric heating protection system for an air conditioner, including:
    转速检测单元，用于检测风机转速；Speed detection unit, used to detect fan speed;
    控制单元，用于在所述空调器制热运行且开启电辅热功能时，如果根据所述风机转速判断风机异常，则控制所述空调器的电加热器关闭，以进行第一重防火保护；A control unit configured to control the electric heater of the air conditioner to turn off if the fan is abnormal according to the fan speed when the air conditioner is running for heating and the electric auxiliary heating function is turned on, so as to perform the first level of fire protection. ;
    温度保护单元，所述温度保护单元串联在所述电加热器的供电回路中，用于在所述电加热器发生过温时断开所述供电回路，以便在所述空调器的第一重防火保护功能失效时进行第二重防火保护。Temperature protection unit, the temperature protection unit is connected in series in the power supply circuit of the electric heater, and is used to disconnect the power supply circuit when the electric heater overheats, so that the first stage of the air conditioner When the fire protection function fails, the second level of fire protection is carried out.
  2. 根据权利要求1所述的电加热保护***，其中，所述控制单元还用于，在室内温度小于第一预设温度时，控制所述风机开启，并在所述风机转速大于第一预设转速时控制所述电加热器开启。The electric heating protection system according to claim 1, wherein the control unit is also used to control the fan to turn on when the indoor temperature is lower than the first preset temperature, and to control the fan to turn on when the fan speed is greater than the first preset temperature. The electric heater is controlled to turn on when rotating.
  3. 根据权利要求2所述的电加热保护***，其中，所述控制单元还用于，在所述风机和所述电加热器的运行过程中，如果所述风机转速小于第二预设转速，则确定所述风机异常，其中，所述第二预设转速小于所述第一预设转速。The electric heating protection system according to claim 2, wherein the control unit is further configured to, during the operation of the fan and the electric heater, if the fan speed is less than a second preset speed, then It is determined that the fan is abnormal, wherein the second preset rotation speed is smaller than the first preset rotation speed.
  4. 根据权利要求3所述的电加热保护***，其中，所述控制单元还用于，在所述风机和所述电加热器的运行过程中，如果所述风机转速大于等于第二预设转速，则在所述空调器的出风口温度大于第二预设温度时，控制所述电加热器关闭。The electric heating protection system according to claim 3, wherein the control unit is further configured to, during the operation of the fan and the electric heater, if the fan speed is greater than or equal to the second preset speed, When the air outlet temperature of the air conditioner is greater than the second preset temperature, the electric heater is controlled to turn off.
  5. 根据权利要求2-4所述的电加热保护***，其中，所述控制单元还用于，在所述风机和所述电加热器的运行过程中，如果所述室内温度大于等于第一预设温度，则控制所述电加热器关闭，并在所述空调器的出风口温度小于第三预设温度时控制所述风机关闭。The electric heating protection system according to claims 2-4, wherein the control unit is further configured to, during the operation of the fan and the electric heater, if the indoor temperature is greater than or equal to the first preset temperature, the electric heater is controlled to turn off, and the fan is controlled to turn off when the air outlet temperature of the air conditioner is lower than the third preset temperature.
  6. 根据权利要求1-5中任一项所述的电加热保护***，其中，所述温度保护单元包括温控器和热熔断器，所述温控器和所述热熔断器分别串联在所述供电回路，且所述温控器的动作温度小于所述热熔断器的动作温度。The electric heating protection system according to any one of claims 1 to 5, wherein the temperature protection unit includes a thermostat and a thermal fuse, and the thermostat and the thermal fuse are respectively connected in series on the power supply circuit, and the operating temperature of the thermostat is lower than the operating temperature of the thermal fuse.
  7. 根据权利要求1-6中任一项所述的电加热保护***，其中，还包括：The electric heating protection system according to any one of claims 1-6, further comprising:
    防火金属件，所述防火金属件限定出适于安装所述电加热器的防火保护腔，所述防火保护腔上设有过风口，所述过风口适于与所述风机配合，以将经过所述电加热器加热后的热风导出，所述防火金属件用于在所述空调器的第二重防火保护功能失效时进行第三重防火保护。Fire-proof metal parts, the fire-proof metal parts define a fire-proof protection cavity suitable for installing the electric heater, the fire-proof protection cavity is provided with an air outlet, and the air outlet is suitable to cooperate with the fan to pass through The hot air heated by the electric heater is exported, and the fireproof metal piece is used to provide third level fire protection when the second level fire protection function of the air conditioner fails.
  8. 根据权利要求7所述的电加热保护***，其中，所述防火金属件为防火钣金件。The electric heating protection system according to claim 7, wherein the fireproof metal part is a fireproof sheet metal part.
  9. 根据权利要求1-8中任一项所述的电加热保护***，其中，所述电加热器为电阻丝加热器，所述空调器采用R32制冷剂。The electric heating protection system according to any one of claims 1 to 8, wherein the electric heater is a resistance wire heater, and the air conditioner uses R32 refrigerant.
  10. 一种空调器，包括根据权利要求1-9中任一项所述的电加热保护***。An air conditioner, including the electric heating protection system according to any one of claims 1-9.
  11. 一种空调器的电加热保护方法，包括：An electric heating protection method for an air conditioner, including:
    在所述空调器制热运行且开启电辅热功能时，获取风机转速；When the air conditioner is running for heating and the electric auxiliary heating function is turned on, the fan speed is obtained;
    在根据所述风机转速判断风机异常时，控制所述空调器的电加热器关闭，以进行第一重防火保护，并在所述空调器的第一重防火保护功能失效时，通过串联在所述电加热器的供电回路中的温度保护单元断开所述供电回路，以进行第二重防火保护。When it is determined that the fan is abnormal based on the fan speed, the electric heater of the air conditioner is controlled to be turned off to perform the first level of fire protection, and when the first level of fire protection function of the air conditioner fails, the air conditioner is connected in series through the The temperature protection unit in the power supply circuit of the electric heater disconnects the power supply circuit to perform the second level of fire protection.
  12. 根据权利要求11所述的方法，其中，所述温度保护单元包括温控器和热熔断器，所述温控器和所述热熔断器分别串联在所述供电回路，且所述温控器的动作温度小于所述热熔断器的动作温度。The method according to claim 11, wherein the temperature protection unit includes a thermostat and a thermal fuse, the thermostat and the thermal fuse are respectively connected in series to the power supply circuit, and the thermostat The operating temperature is lower than the operating temperature of the thermal fuse.
  13. 根据权利要求11或12所述的方法，其中，在所述空调器的第二重防火保护功能失效时，还通过防火金属件进行第三重防火保护，其中，所述防火金属件限定出适于安装所述电加热器的防火保护腔，所述防火保护腔上设有过风口，所述过风口适于与所述风机配合，以将经过所述电加热器加热后的热风导出。The method according to claim 11 or 12, wherein when the second level fire protection function of the air conditioner fails, a third level fire protection is also performed through a fireproof metal piece, wherein the fireproof metal piece defines an appropriate area. In the fire protection cavity where the electric heater is installed, the fire protection cavity is provided with an air outlet, and the air outlet is suitable for cooperating with the fan to lead out the hot air heated by the electric heater.
PCT/CN2022/134140 2022-07-28 2022-11-24 Air conditioner, and electric-heating protection system and method therefor WO2024021396A1 (en)

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