Electric heating device of air conditioner and control method thereof

A technology for electric heating devices and air conditioners, which is applied in the direction of electric heating devices, heating methods, lighting and heating equipment, etc. It can solve the problems of inability to realize adjustment, fixed output power, low power factor, etc., and achieve simple and reasonable structure and fast on-off Control, low production cost effect

Active Publication Date: 2011-10-26
GUANGZHOU HUALING REFRIGERATION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are existing electric heating control technologies for air conditioners. The main control methods are: use relays to control the on-off of electric heaters. The disadvantage is that the output power is relatively fixed and cannot be adjusted. When fast on-off is required, the contacts of the relay The response cannot be achieved and cannot be realized; when using an electronic switch instead of a contact switch for on-off control, the disadvantage is that the electronic switch is broken down and short-circuited, and the safety cannot be guaranteed; in terms of power adjustment, there is a method to use SCR is used as an electronic switch to detect the zero-crossing point of the mains, and adjust the output electric power through phase modulation to adjust the heating value of the electric heater. The disadvantage is that the power factor will be low and it is not good for the grid. When the thyristor is turned on near the 90-degree phase, it is easy to cause driving abnormality due to the large instantaneous change rate of current conduction

Method used

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  • Electric heating device of air conditioner and control method thereof
  • Electric heating device of air conditioner and control method thereof
  • Electric heating device of air conditioner and control method thereof

Examples

Experimental program
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no. 1 example

[0039] see Figure 1-Figure 2 , the electric heating device of the air conditioner includes the mains live wire L, the electric heater 4, the mains neutral line N, the main control unit 6 and the contact switch 1 and the on-off controlled by the main control unit 6 which are connected in sequence Electronic switch 5; wherein, the live wire L of the mains, the contact switch 1, the electric heater 4, the electronic switch 5 and the neutral wire N of the mains are connected in sequence; or, the live wire L of the mains, the contact switch 1, the electronic Type switch 5, electric heater 4 and mains neutral line N are connected sequentially; or, mains live line L, electronic switch 5, contact switch 1, electric heater 4 and mains neutral line N are connected in sequence; or, The commercial live wire L, the electronic switch 5, the electric heater 4, the contact switch 1 and the commercial neutral wire N are connected in sequence.

[0040] An on-off thermal protector is arranged ...

no. 2 example

[0062] see figure 1 and image 3 , the working principle is similar to the first embodiment, the difference is that the control circuit of the thyristor TR1 is changed from optocoupler control to solid state relay control, and the control circuit is simpler.

[0063] See the first embodiment for the rest of the undescribed parts, and will not repeat them here.

no. 3 example

[0065] see figure 1 and Figure 4 , the second sensor T2 of the second thermal protector is connected in series with the control circuit of the relay RY1, and the solid state relay RY2 is connected between the electric heater DJR and the neutral line N of the commercial power.

[0066] See the first embodiment for the rest of the undescribed parts, and will not repeat them here.

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PUM

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Abstract

The invention discloses an electric heating device of an air conditioner and a control method thereof. The electric heating unit of the air conditioner includes a commercial electricity live wire L, an electric heater, a commercial electricity null wire N, a main control unit, and a contact switch and an electronic switch which are switched on or off both under the control of the main control unit, wherein the commercial electricity live wire L, the contact switch, the electric heater and the electronic switch are connected with the commercial electricity null wire N sequentially; or the commercial electricity live wire L, the contact switch, the electronic switch and the electric heater are connected with the commercial electricity null wire N in sequence. In operation, when the electricheating function is initiated, the main control unit firstly closes the contact switch, then controls the electronic switch for quick switch-on / off action in order to regulate the output power of theelectric heater so that the output heat of the electric heater meets the demand. The electric heating device of the invention is simple in structure, flexible in operation, low in production costs, high in security, quick in power regulation and wide in applicable range.

Description

technical field [0001] The invention relates to an electric heating device, in particular to an electric heating device of an air conditioner and a control method thereof. Background technique [0002] There are existing electric heating control technologies for air conditioners. The main control methods are: use relays to control the on-off of electric heaters. The disadvantage is that the output power is relatively fixed and cannot be adjusted. When fast on-off is required, the contacts of the relay The response cannot be realized; when the electronic switch is used instead of the contact switch for on-off control, the disadvantage is that the electronic switch is broken down and short-circuited, and the safety cannot be guaranteed; in terms of power adjustment, there is a method to use As an electronic switch, the thyristor detects the zero-crossing point of the mains, and adjusts the output electric power through phase modulation to adjust the heating value of the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F13/00F24F11/00H05B1/02
Inventor 王斌
Owner GUANGZHOU HUALING REFRIGERATION EQUIP
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