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Protection method of electric heating over-temperature protection device for motor car air conditioner

A protection device and electric heating technology, applied in the direction of automatic disconnection emergency protection device, emergency protection circuit device, circuit device, etc. The normal use of the heater and other problems can eliminate the possibility of frequent start and stop, prolong the service life, and increase the safety and reliability.

Active Publication Date: 2018-05-08
NEW UNITED RAIL TRANSIT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] A large amount of electromagnetic interference will be generated when the train is running. In the existing protection method, the temperature control protection switch is easy to lose, which affects the normal use of the electric heater.
[0006] If the temperature of the electric heater is too high, it will accelerate the aging of the non-metal parts on the electric heater and reduce the service life of the electric heater
Existing protection methods cannot prevent overheating of electric heaters

Method used

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  • Protection method of electric heating over-temperature protection device for motor car air conditioner
  • Protection method of electric heating over-temperature protection device for motor car air conditioner
  • Protection method of electric heating over-temperature protection device for motor car air conditioner

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] see figure 1 , the embodiment of the present invention includes:

[0042] An electric heating over-temperature protection device for an air conditioner for motor vehicles, comprising: an electric heater 1, a controller 2, and a flow switch 4, and also includes a primary temperature control protection switch 3 and a secondary temperature control protection switch 5, the primary temperature control The lower ends of the protection switch 3 and the flow switch 4 are connected in parallel to the common power supp...

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Abstract

The invention discloses a protection method for an electric heating over-temperature protection device of an air conditioner for motor vehicles. The lower end of the first-level temperature control protection switch and the flow switch are connected in parallel and then connected to the common end of the power supply of the controller. The first-level temperature control protection The upper ends of the switch and the flow switch are respectively connected to the signal acquisition input end of the controller, and the secondary temperature control protection switch is connected in series in the main circuit of the electric heater. Through the above method, the present invention prevents the overheating phenomenon of the electric heater by analyzing the cause of the overheating of the electric heater through the creative application of the flow switch, prolonging the service life of the electric heater and reducing the failure rate of the electric heater; The level fault handling method reduces the impact of external interference on the operation of the electric heater, eliminates the possibility of frequent start and stop of the electric heater, and prolongs the service life of the electric heater, cables and contactors.

Description

technical field [0001] The invention relates to the field of over-temperature protection, in particular to a protection method for an electric heating over-temperature protection device for an air conditioner of a train. Background technique [0002] The existing control method is to install a self-resetting temperature control protection switch on the electric heater, and the temperature controller is connected in series in the control circuit of the electric heater. When the air temperature around the electric heater exceeds the safe value, the temperature control protection switch disconnects the control circuit, so that the contactor controlling the electric heater is disconnected, thereby cutting off the working power of the electric heater. [0003] The existing protection method has only one protection measure, which cannot protect the electric heater when the temperature control protection switch is damaged. The protection method is to disconnect the contactor contr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H5/04G05D23/19
Inventor 杨雪东朱晓文姚晓庆李玲莹杨健
Owner NEW UNITED RAIL TRANSIT TECH
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