CN111271311B - A kind of electric fan to prevent overcooling control device - Google Patents

A kind of electric fan to prevent overcooling control device Download PDF

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CN111271311B
CN111271311B CN202010105440.9A CN202010105440A CN111271311B CN 111271311 B CN111271311 B CN 111271311B CN 202010105440 A CN202010105440 A CN 202010105440A CN 111271311 B CN111271311 B CN 111271311B
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electric fan
temperature
relay
circuit
metal disc
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CN111271311A (en
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季振国
席俊华
李阳阳
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Hangzhou Dianzi University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00Control
    • F05D2270/30Control parameters, e.g. input parameters
    • F05D2270/303Temperature

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

本发明公开了一种电风扇防止过凉控制装置。目前的温控型电风扇均没有考虑深夜谷电期间电网电压升高导致电风扇转速增加等因素。本发明包括设置在电风扇的前防护罩中心、且面向叶片方向的金属圆盘,金属圆盘内设有加热器和温度传感器。加热器由恒流源供电,对金属圆盘加热。温度传感器通过测温与比较电路接驱动电路,驱动电路接继电器,继电器的输出触点串接在电风扇电机回路中。本发明中电风扇吹出的风直接吹在前网罩中心的圆盘上,室温过低及电网电压过高均使得圆盘温度下降,由此判断是否断开电风扇电机,以避免人员受凉。本发明结构简单,实用性强,只要把控制装置的继电器的输出串接在电机上即可,适用性广。

Figure 202010105440

The invention discloses a control device for preventing overcooling of an electric fan. The current temperature-controlled electric fans do not take into account factors such as the increase in the speed of the electric fan caused by the increase of the grid voltage during the late-night valley electricity. The invention includes a metal disc arranged in the center of the front protective cover of the electric fan and facing the direction of the blades, and a heater and a temperature sensor are arranged in the metal disc. The heater is powered by a constant current source and heats the metal disc. The temperature sensor is connected to the drive circuit through the temperature measurement and comparison circuit, the drive circuit is connected to the relay, and the output contact of the relay is connected in series in the electric fan motor circuit. In the present invention, the wind blown by the electric fan blows directly on the disc in the center of the front grille. Too low room temperature and too high grid voltage will make the temperature of the disc drop, so it is judged whether to disconnect the electric fan motor to prevent people from getting cold. The invention is simple in structure and strong in practicability, as long as the output of the relay of the control device is connected to the motor in series, and the invention has wide applicability.

Figure 202010105440

Description

一种电风扇防止过凉控制装置A kind of electric fan to prevent overcooling control device

技术领域technical field

本发明属于自动化控制技术领域,具体涉及一种电风扇防止过凉控制装置。The invention belongs to the technical field of automatic control, and in particular relates to a control device for preventing overcooling of an electric fan.

背景技术Background technique

电风扇具有可移动性好、性价比高、耗电省等特点,被广泛用于家庭和办公室中。但是,晚上睡觉时如果长时间吹电风扇则容易着凉生病。为此,有人提出了温控型电风扇,如发明专利 CN201711181556.5,通过测量室温控制电风扇的转速或者其开关状态,避免夜晚室温降低后电风扇仍然高速运转导致人员着凉。但是,夜晚长时间吹电风扇容易着凉的原因除了室温降低后电风扇转速没有作出相应的降低这个因素外,夜间电网电压升高导致电风扇转速升高也是重要的因素。由于峰电期间电网用电负荷高,所以晚上开始使用电风扇时用户室内线路的电压往往严重偏低,因而电风扇的风速挡位设置一般较高。而当深夜用电低谷时,用户室内的电压往往偏高导致电风扇转速升高。因此,夜间吹电风扇导致人体着凉的原因除了深夜室温降低外,还必须考虑深夜谷电期间电网电压升高这个因素。但是目前提出的温控型电风扇均没有考虑深夜谷电期间电网电压升高导致电风扇转速增加这个因素。Electric fans have the characteristics of good mobility, high cost performance and low power consumption, and are widely used in homes and offices. However, if you blow an electric fan for a long time when you sleep at night, it is easy to catch a cold and get sick. To this end, some people have proposed a temperature-controlled electric fan, such as the invention patent CN201711181556.5, by measuring the room temperature to control the speed of the electric fan or its switch state, so as to avoid the electric fan still running at high speed after the room temperature drops at night, which will cause people to catch cold. However, the reason why it is easy to catch cold by blowing an electric fan for a long time at night is not only the factor that the speed of the electric fan does not decrease accordingly after the room temperature is lowered, but also the increase of the speed of the electric fan caused by the increase of the grid voltage at night is also an important factor. Due to the high power load of the power grid during peak power periods, the voltage of the user's indoor line is often seriously low when the electric fan is used at night, so the wind speed gear setting of the electric fan is generally higher. When the power consumption is low in the middle of the night, the voltage in the user's room is often high, which leads to an increase in the speed of the electric fan. Therefore, in addition to lowering the room temperature in the middle of the night, the reason why blowing an electric fan at night causes the human body to catch a cold must also consider the factor that the grid voltage increases during the late-night valley electricity. However, none of the temperature-controlled electric fans proposed so far has taken into account the factor that the increase in the speed of the electric fan caused by the increase of the grid voltage during the late-night valley electricity period.

发明内容SUMMARY OF THE INVENTION

本发明的目的就是针对现有技术的不足,提供一种电风扇防止过凉控制装置,既能避免晚间室温过低而风扇速度不下降导致的人员受凉,又能防止深夜电网电压过高导致风扇速度过高引起人员着凉。The purpose of the present invention is to aim at the deficiencies of the prior art, and to provide a control device for preventing overcooling of electric fans, which can not only prevent people from getting cold due to the fact that the room temperature is too low at night but the fan speed does not drop, but also prevent the fan from being caused by too high power grid voltage in the middle of the night. Excessive speed can cause people to catch cold.

本发明包括设置在电风扇的前防护罩中心、且面向叶片方向的金属圆盘,金属圆盘内开有安装孔,安装孔内设有加热器和温度传感器。The invention includes a metal disc arranged in the center of the front protective cover of the electric fan and facing the direction of the blades. The metal disc is provided with an installation hole, and the installation hole is provided with a heater and a temperature sensor.

所述的加热器由恒流源供电,对金属圆盘加热。The heater is powered by a constant current source to heat the metal disc.

所述的温度传感器的信号输出端接测温与比较电路的信号输入端,测温与比较电路的信号输出端接驱动电路的信号输入端,驱动电路的信号输出端接继电器的输入端,继电器的输出触点串接在电风扇电机回路中。The signal output end of the temperature sensor is connected to the signal input end of the temperature measurement and comparison circuit, the signal output end of the temperature measurement and comparison circuit is connected to the signal input end of the drive circuit, the signal output end of the drive circuit is connected to the input end of the relay, and the relay The output contacts are connected in series in the electric fan motor circuit.

直流供电电路的一端为接电端,另一端分别连接恒流源、测温与比较电路、驱动电路,为恒流源、测温与比较电路、驱动电路供电。One end of the DC power supply circuit is the power connection end, and the other end is connected to the constant current source, the temperature measurement and comparison circuit, and the driving circuit, respectively, to supply power for the constant current source, the temperature measurement and comparison circuit, and the driving circuit.

进一步,所述的继电器为常闭触点型继电器。Further, the relay is a normally closed contact type relay.

本发明的有益效果包括:The beneficial effects of the present invention include:

1.本发明不是简单地测量室温来控制电风扇,而通过电风扇吹出的风导致被吹到的金属圆盘的温度变化进行间接控制。由于金属圆盘的温度是在电风扇叶片风流作用下的测得的,比测量其他位置的室温更加能够反映人体感受的实际温度。1. The present invention does not simply measure the room temperature to control the electric fan, but indirectly controls the temperature change of the metal disc blown by the wind blown by the electric fan. Because the temperature of the metal disc is measured under the action of the wind flow of the electric fan blade, it can better reflect the actual temperature felt by the human body than measuring the room temperature in other locations.

2.本发明不是仅仅测量室温的变化,而且还考虑了电网电压变化引起的风扇速度变化,避免室温变化不大,但是电网电压过高引起的转速过高导致人员着凉的问题。2. The present invention does not only measure the change of room temperature, but also considers the change of the fan speed caused by the change of the grid voltage, so as to avoid the problem that the room temperature does not change much, but the high speed of the grid voltage causes the personnel to catch cold.

3.本发明把温度传感器置于金属圆盘内部,利用金属热容量大的特点,防止短暂的室温变化或者短暂的电网电压变化误触发控制电路工作,避免电风扇电机电流频繁接通或关闭,提高人体舒适度。3. In the present invention, the temperature sensor is placed inside the metal disc, and the metal heat capacity is large to prevent short-term room temperature changes or short-term grid voltage changes from falsely triggering the control circuit to work, to avoid frequent switching on or off of the electric fan motor current, and to improve Human comfort.

4.本发明不改变风扇原有控制线路,只要把控制装置的继电器的输出串接在电机上即可,适用性广。4. The present invention does not change the original control circuit of the fan, but only needs to connect the output of the relay of the control device to the motor in series, and has wide applicability.

附图说明Description of drawings

图1为本发明的结构示意图;Fig. 1 is the structural representation of the present invention;

图2为本发明的电路示意图。FIG. 2 is a schematic circuit diagram of the present invention.

具体实施方式Detailed ways

如图1所示,一种电风扇防止过凉控制装置,包括设置在电风扇的前防护罩中心、且面向叶片方向的金属圆盘1,金属圆盘1内开有安装孔,安装孔内设有加热器2和温度传感器3。As shown in FIG. 1, a control device for preventing overcooling of an electric fan includes a metal disc 1 arranged in the center of the front protective cover of the electric fan and facing the direction of the blades. The metal disc 1 is provided with an installation hole, and the installation hole A heater 2 and a temperature sensor 3 are provided.

如图2所示,加热器2由恒流源4供电,对金属圆盘1加热。As shown in FIG. 2 , the heater 2 is powered by a constant current source 4 to heat the metal disc 1 .

温度传感器3的信号输出端接测温与比较电路5的信号输入端,测温与比较电路5的信号输出端接驱动电路6的信号输入端,驱动电路6的信号输出端接继电器7的输入端,继电器7的输出触点串接在电风扇电机回路中。直流供电电路8的一端为接电端,使用中连接市电,另一端分别连接恒流源4、测温与比较电路5、驱动电路6,为恒流源4、测温与比较电路5、驱动电路6供电。The signal output end of the temperature sensor 3 is connected to the signal input end of the temperature measurement and comparison circuit 5, the signal output end of the temperature measurement and comparison circuit 5 is connected to the signal input end of the drive circuit 6, and the signal output end of the drive circuit 6 is connected to the input of the relay 7 terminal, the output contact of the relay 7 is connected in series in the electric fan motor circuit. One end of the DC power supply circuit 8 is the power connection terminal, which is connected to the commercial power in use, and the other end is respectively connected to the constant current source 4, the temperature measurement and comparison circuit 5, and the drive circuit 6, which are the constant current source 4, the temperature measurement and comparison circuit 5, The drive circuit 6 is powered.

温度传感器3测量金属圆盘的温度,测温与比较电路5把测得的温度与预先设置的温度进行比较,并根据比较结果控制驱动电路6输出继电器驱动电流,控制继电器7开启和闭合。继电器7的输出串接在电风扇电机回路中,控制电机电流的通断,从而控制电风扇的开关。The temperature sensor 3 measures the temperature of the metal disc, and the temperature measurement and comparison circuit 5 compares the measured temperature with the preset temperature, and controls the drive circuit 6 to output the relay drive current according to the comparison result, and controls the relay 7 to open and close. The output of the relay 7 is connected in series in the electric fan motor circuit to control the on-off of the motor current, thereby controlling the switch of the electric fan.

电风扇电机回路主要包括电机控制电路9和电风扇电机10(图中虚线框内部分),使用现有电风扇技术不变。The electric fan motor circuit mainly includes a motor control circuit 9 and an electric fan motor 10 (the part inside the dashed frame in the figure), and the existing electric fan technology is unchanged.

继电器7采用常闭触点型继电器,测温与比较电路5、驱动电路6、直流供电电路8均为成熟的现有技术,该控制装置的发明点在于利用现有的这些电路,根据温度变化调整电风扇的开关方式。具体工作方式是:The relay 7 adopts a normally closed contact type relay, and the temperature measurement and comparison circuit 5, the drive circuit 6, and the DC power supply circuit 8 are all mature prior art. Adjust the switch mode of the electric fan. The specific working method is:

电风扇电机工作时,若测得的温度高于设定温度,则温度比较电路不输信号,驱动电路不输出驱动电流,常闭触点型继电器的线圈没有电流流过,触点闭合,电风扇在原控制电路下工作。反之,若测得的温度低于设定温度,则温度比较电路输出驱动电流,常闭触点型继电器的触点断开,电风扇电机断开,电风扇风扇停止转动,避免被吹人员着凉。When the electric fan motor is working, if the measured temperature is higher than the set temperature, the temperature comparison circuit will not output the signal, the drive circuit will not output the drive current, the coil of the normally closed contact relay does not flow through the coil, the contact is closed, and the electric The fan works under the original control circuit. On the contrary, if the measured temperature is lower than the set temperature, the temperature comparison circuit outputs the drive current, the contact of the normally closed contact relay is disconnected, the electric fan motor is disconnected, and the electric fan fan stops rotating, so as to avoid the person being blown from catching a cold. .

具体工作原理是:电风扇工作时,加热器在设定的电流下加热金属圆盘,加热电流的设定要使得金属圆盘的温度高于当时室温5~10度(根据需要设定)。在室温和电风扇的转速均不变时,则金属圆盘的温度也不变,控制器不工作,输出继电器触点常闭,电风扇按常规模式运行。The specific working principle is: when the electric fan is working, the heater heats the metal disc under the set current, and the setting of the heating current should make the temperature of the metal disc 5-10 degrees higher than the room temperature at that time (set according to needs). When the room temperature and the rotational speed of the electric fan remain unchanged, the temperature of the metal disc also remains unchanged, the controller does not work, the contact of the output relay is normally closed, and the electric fan operates in the normal mode.

情况1.当室温下降时,由于通过加热器的电流由恒流源提供而没有变化,因此室温下降将导致金属圆盘的温度下降,经测温与比较电路判定后由驱动电路输出驱动电流控制继电器触点断开,风扇电机电流被切断,风扇叶片停转。风扇停转后,金属圆盘的温度随室温升高而慢慢回升。当金属圆盘的温度回升到设定值以上时,驱动电路不再输出驱动电流,控制继电器触点闭合,风扇电机电流接通,风扇叶片重新转动。上述调整过程过程持续进行,避免室温温度过低时被吹人员受凉。Case 1. When the room temperature drops, since the current through the heater is provided by the constant current source and does not change, the drop in room temperature will cause the temperature of the metal disc to drop. After the temperature measurement and comparison circuit determines, the drive circuit outputs the drive current and controls it. The relay contacts are opened, the fan motor current is cut off, and the fan blades stop. After the fan stops, the temperature of the metal disc slowly rises as the room temperature rises. When the temperature of the metal disc rises above the set value, the drive circuit no longer outputs the drive current, the control relay contacts are closed, the fan motor current is turned on, and the fan blades rotate again. The above adjustment process is carried out continuously, so as to avoid the person being blown cold when the room temperature is too low.

情况2.当深夜谷电期间电网电压升高时,由于通过加热器的电流是恒流的,因此加热功率没有变化,但是由于电风扇叶片的转速升高,因此电网电压升高将导致金属圆盘的温度下降,测温与比较电路控制驱动电路输出驱动电流控制继电器触点断开,风扇电机电流被切断,风扇叶片停转,金属圆盘的温度慢慢回升。当金属圆盘的温度回升到设定值以上时,温度比较电路停止输出电流,控制继电器触点闭合,风扇电机电流接通,风扇叶片重新转动。上述调整过程持续进行,避免电网电压过高时被吹人员受凉。Case 2. When the grid voltage rises during the late-night valley electricity, the heating power does not change because the current through the heater is constant current, but due to the increase in the speed of the electric fan blades, the increase in the grid voltage will cause the metal circle When the temperature of the disk drops, the temperature measurement and comparison circuit controls the output of the drive circuit and the control relay contact is disconnected, the current of the fan motor is cut off, the fan blades stop, and the temperature of the metal disk slowly rises. When the temperature of the metal disc rises above the set value, the temperature comparison circuit stops outputting current, the control relay contacts are closed, the fan motor current is turned on, and the fan blades rotate again. The above adjustment process is carried out continuously to avoid people who are blown cold when the grid voltage is too high.

情况3.室温下降,同时电网电压升高。由于通过加热器的电流没有变化,因此室温下降和电网电压升高两者均将导致金属圆盘的温度下降,经测温与比较电路判定后由驱动电路输出电流控制继电器触点断开,风扇电机电流被切断,风扇叶片停转,金属圆盘的温度回升。当金属圆盘的温度回升到设定值以上时,驱动电路停止输出驱动电流,继电器触点闭合,风扇电机电流接通,风扇叶片重新转动。上述调整过程持续进行,避免金属圆盘的温度过低导致被吹人员受凉。Case 3. The room temperature drops and the grid voltage rises at the same time. Since the current passing through the heater does not change, both the drop in room temperature and the rise in grid voltage will cause the temperature of the metal disc to drop. After the temperature measurement and comparison circuit judges, the output current of the drive circuit will control the relay contact to disconnect, and the fan will be disconnected. The motor current is cut off, the fan blades stop, and the temperature of the metal disc rises. When the temperature of the metal disc rises above the set value, the drive circuit stops outputting the drive current, the relay contacts are closed, the fan motor current is turned on, and the fan blades rotate again. The above adjustment process is continued to prevent the temperature of the metal disc from being too low to cause the person being blown to get cold.

Claims (2)

1. The utility model provides an electric fan prevents cold controlling means which characterized in that:
the electric fan comprises a metal disc (1) which is arranged in the center of a front protective cover of the electric fan and faces to the direction of a blade, wherein a mounting hole is formed in the metal disc (1), and a heater (2) and a temperature sensor (3) are arranged in the mounting hole;
the heater (2) is powered by a constant current source (4) and heats the metal disc (1);
the signal output end of the temperature sensor (3) is connected with the signal input end of the temperature measuring and comparing circuit (5), the signal output end of the temperature measuring and comparing circuit (5) is connected with the signal input end of the driving circuit (6), the signal output end of the driving circuit (6) is connected with the input end of the relay (7), and the output contact of the relay (7) is connected in series in the motor loop of the electric fan;
one end of the direct current power supply circuit (8) is a power connection end, and the other end of the direct current power supply circuit is respectively connected with the constant current source (4), the temperature measurement and comparison circuit (5) and the driving circuit (6) to supply power for the constant current source (4), the temperature measurement and comparison circuit (5) and the driving circuit (6).
2. The control device for preventing the electric fan from being too cold as claimed in claim 1, wherein: the relay (7) is a normally closed contact type relay.
CN202010105440.9A 2020-02-20 2020-02-20 A kind of electric fan to prevent overcooling control device Expired - Fee Related CN111271311B (en)

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