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New energy bus air conditioner PTC heater starting control method, computer readable storage medium and air conditioner

A heater and new energy technology, applied in heating/cooling equipment, air handling equipment, transportation and packaging, etc., can solve the problems of power supply shock, electrical shock of electrical components, shortening the electrical life of electrical components, etc., to improve electrical life, The effect of reducing the inrush current and reducing the allowable current requirement

Active Publication Date: 2020-04-07
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The high starting current has a great impact on the front-end electrical components, such as fuses, DC contactors, power supplies, etc.
A new energy bus air conditioner is equipped with two PTC heaters on the left and right. If the rated current of each electric heater is 6.67A, then the current of the two electric heaters in stable operation is 13.34A, but the maximum current at startup Up to 33.4A, causing a large electrical shock to the front-end electrical components and shortening the electrical life of the electrical components

Method used

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  • New energy bus air conditioner PTC heater starting control method, computer readable storage medium and air conditioner

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Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: A new energy bus air conditioner PTC heater startup control method.

[0019] like figure 1 As shown, a new energy bus air conditioner PTC heater startup control method, the specific steps are as follows:

[0020] (1) The main control unit is ready to turn on the auxiliary PTC heater, first detect the current I of the main circuit, and obtain the current value I of the main circuit 1 ; I 1 with the set current value I limit1 Compare, if I 1 ≤I limit1 , then turn on the first auxiliary PTC heater 1;

[0021] (2) If I 1 > I limit1 , reduce the frequency of the compressor or stop the compressor (the fan does not stop), thereby reducing the main circuit current I. After the frequency is reduced or the compressor is stopped, the main circuit current I is detected to obtain the main circuit current value I 2 . I 2 with the set current value I limit1 Compare, if I 2 ≤ I limit1 , then turn on the first auxiliary PTC heater 1;

[0022] (3) Start timin...

Embodiment 2

[0028] Embodiment 2: A new energy bus air conditioner PTC heater startup control method.

[0029] A new energy bus air conditioner PTC heater startup control method, the specific steps are as follows:

[0030] The difference from Embodiment 1 is that the current value of the main circuit is not detected, and the auxiliary PTC heater 1 and PTC 2 are respectively turned on at intervals of a certain time. Generally, the power-on surge current of the PTC will fall steadily within 30s. As long as the two PTCs are forced to be turned on at intervals of more than 30s, the superposition of the power-on current of the two PTCs can be avoided. That is, other load current 10A + two PTC power-on currents 32A = 42A, when the interval is turned on, when the first one is turned on, the current rises to 26A and then falls back to 18A, and then the second PTC is turned on, the current rises to 34A, and then Falling back to 26A can play a role in avoiding large inrush current.

Embodiment 3

[0031]Embodiment 3: a computer-readable storage medium.

[0032] A computer-readable storage medium for storing a computer program, and when the computer program is invoked by a processor, the method for controlling the start-up of the PTC heater of the new energy bus air conditioner described in Embodiment 1 or Embodiment 2 is implemented.

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Abstract

The invention provides a new energy bus air conditioner PTC heater starting control method, a computer readable storage medium and an air conditioner. When the heating capacity of a system is insufficient, an auxiliary PTC heater needs to be started, a first PTC heater is started after the current of a main circuit meets a starting condition by detecting the current of the main circuit, the current of the main circuit continues to be detected after a period of time, and a second PTC heater is started after the current of the main circuit meets the starting condition. By setting the first buffer time, the two PTC heaters are controlled to be started separately, superposition of two starting large impact currents is avoided, and the electrical life of the new energy bus air conditioner is prolonged.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a new energy bus air conditioner PTC heater startup control method, a computer-readable storage medium and an air conditioner. Background technique [0002] New energy bus air conditioners generally use compressors and PTC heaters for heating. First run the compressor to provide heating capacity, when the heat provided by the compressor is insufficient, turn on the PTC heater for auxiliary heating. [0003] Due to the characteristics of the PTC itself, when the PTC heater is energized and started, the current will have a surge, reach the highest point, then the current will drop, and then gradually stabilize the process. We call the highest point reached by the current overshoot as the maximum starting current. [0004] The maximum starting current will be very large, and some will reach 2.5 times the rated current. For example, a new energy bus air conditioner PTC he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/00B60H1/22
CPCB60H1/00371B60H1/2218
Inventor 林晖
Owner GREE ELECTRIC APPLIANCES INC
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