A heat pump type electric vehicle air conditioner defrosting online detection and control method

A technology for electric vehicles and control methods, which is applied in heating methods, heating and ventilation control systems, refrigerators, etc., can solve the problems of small heat exchanger space, many factors involved, and poor economy, so as to improve the performance of the unit and reduce the opening time. time, and the effect of improving operational efficiency

CN104089364BActive Publication Date: 2017-05-31SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-05-31

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Abstract

The invention discloses an on-line defrosting detection and control system for a heat pump type electric automobile air conditioner. The on-line defrosting detection and control system comprises a processor, and a temperature sensor, a camera, a humiture sensor I, an air speed sensor and a humiture sensor II which are respectively connected with the processor, wherein the temperature sensor is arranged on the surface of an inlet pipeline of a heat pump working condition heat exchanger of an automobile outside heat exchanger of the heat pump type electric automobile air conditioner; the camera is arranged at the bottommost part of a heat exchanger fin on the inlet side of the automobile outside heat exchanger; the humiture I is arranged at the middle part of an air inlet grating of the automobile outside heat exchanger; the air speed sensor and the humiture sensor II are arranged behind a fan at an air outlet of the automobile outside heat exchanger. According to the system and the method which are disclosed by the invention, a frosting condition and a defrosting condition of the automobile outside heat exchanger under a heating working condition can be accurately judged, and the problems of mis-defrosting such as defrosting under a condition of no frost, no defrosting under a condition of frosts, incomplete defrosting, non-stopping under a condition that the frosts are completely cleared are solved; the defrosting loss of a heat pump air conditioning system is reduced, and the heating performance of the heat pump air conditioning system is improved.
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Description

technical field

[0001] The invention relates to the technical field of air source heat pump applications, in particular to a heat pump type electric vehicle air conditioner defrosting online detection and control system and method. Background technique

[0002] When the air source heat pump air conditioner is heating in winter, the outdoor heat exchanger is easy to frost. When the frost layer reaches a certain height, it must be defrosted. The method of defrosting determines the efficiency of defrosting, and the detection of frost layer thickness and The defrosting control strategy determines the heating efficiency of the whole unit. At present, scholars at home and abroad have done a lot of theoretical and experimental research on frost thickness detection and defrosting control strategies. The main methods are as follows:

[0003] 1) Timing control method: the method adopted in the early days. When setting the defrosting time, the worst environmental conditions are often...

Examples

Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0039] like figure 1 , a heat pump type electric vehicle air conditioner defrosting online detection and control system, including a processor 13, and a temperature sensor 11 connected to the processor 13, a camera 12, a temperature and humidity sensor 10, a wind speed sensor 8, and a temperature and humidity sensor 2 9. The temperature sensor 11 is set on the surface of the heat pump inlet pipeline of the heat pump heat exchanger 3 of the heat pump electric vehicle air conditioner, and the camera 12 is set on the heat exchange side of the heat exchanger 3 inlet side. The lowest part of the fin, the temperature and humidity sensor one 10 is set at the middle of the intake grille of the external heat exchanger 3, and the wind speed sensor 8 and temperature and humidity se...