KR-102962810-B1 - Method for controlling Air conditioner of vehicle

KR102962810B1KR 102962810 B1KR102962810 B1KR 102962810B1KR-102962810-B1

Abstract

A control method for a vehicle air conditioning system according to the present invention, which controls an evaporator by measuring the temperature of the evaporator during a cooling and heating mode, comprises: (A) a step of measuring the temperature of the evaporator using first and second temperature sensors installed at different locations on the evaporator; (B) a step of selecting the lowest temperature among the temperatures measured by the first and second temperature sensors; and (C) a step of performing a de-icing mode of the evaporator based on the temperature value selected in step B. According to the control method of a vehicle air conditioning system according to the present invention, a first temperature sensor and a second temperature sensor are installed at different locations on the evaporator to appropriately select a low temperature of the evaporator and to perform an ice-making mode of the evaporator based on the selected temperature value, thereby accurately sensing the lowest temperature of the evaporator to prevent icing during heating and dehumidification. In addition, according to the control method of a vehicle air conditioning system of the present invention, the lowest temperature of the evaporator is accurately sensed to prevent unnecessary waste of power consumption. Accordingly, the control method for a vehicle air conditioning system according to the present invention accurately senses the lowest temperature of the evaporator to prevent icing and reduce power consumption, thereby increasing the performance of the vehicle air conditioning system.

Inventors

박경태

Assignees

주식회사 두원공조

Dates

Publication Date: 20260512
Application Date: 20210309

Claims (4)

delete
delete
A control method for a vehicle air conditioning system that controls an evaporator by measuring the temperature of the evaporator during a cooling or heating mode, (A) A step of measuring the temperature of the evaporator using first and second temperature sensors installed at different locations on the evaporator; (B) A step of selecting the lowest temperature among the temperatures measured by the first and second temperature sensors; and (C) A step of performing an ice-making mode of the evaporator based on the temperature value selected in step B above, and The first and second temperature sensors are each installed at selected points among the points where a plurality of virtual horizontal lines spaced apart vertically and a plurality of virtual vertical lines spaced apart horizontally intersect when the evaporator is viewed from the front. A control method for a vehicle air conditioning system in which the first temperature sensor for cooling and the second temperature sensor for heating and dehumidification are installed at each of the two points with the lowest temperature for each evaluation among the plurality of the above-mentioned intersection points through cooling evaluation and heating and dehumidification evaluation.
In claim 3, A control method for a vehicle air conditioning system in which, during a heating/dehumidification mode, the temperature at the intersection point where the second temperature sensor is installed is equal to or lower than the temperature at the intersection point where the first temperature sensor is installed.

Description

Method for controlling air conditioner of vehicle The present invention relates to a method for controlling a vehicle air conditioning system, and more specifically, to a method for controlling a vehicle air conditioning system to control a suitable temperature of a vehicle. Generally, a vehicle's air conditioning system is a device designed to cool or heat the vehicle's interior by introducing outside air into the cabin or by heating or cooling the air circulating within the cabin. To ensure proper temperature control, such vehicle air conditioning systems install a temperature sensor at the part of the evaporator with the lowest temperature, receive temperature information from the sensor, and enable appropriate temperature control through heater control. However, in conventional automotive air conditioning systems, there may be differences in refrigerant flow rates during heating and cooling modes, and in vehicles equipped with a separate heating and dehumidification mode, the lowest temperature of the evaporator varies depending on the heating and cooling mode. Consequently, proper temperature control is not achieved in the vehicle air conditioning system, and icing occurs due to the difference in the lowest temperature of the evaporator during cooling and heating modes, leading to a decrease in the performance of the vehicle air conditioning system. FIG. 1 is a perspective view of an evaporator, a control unit, and an operating unit in which first and second temperature sensors according to the present invention are installed. Figure 2 is an enlarged view of section A' of Figure 1. Figure 3 is a front view of the evaporator of Figure 1. Figure 4 is a flowchart showing the control method of the evaporator of Figure 1. The present invention has been described with reference to the embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims. Referring to FIGS. 1 and 2, a control device (100) for a vehicle air conditioning system is for measuring the temperature of an evaporator (110) installed in a vehicle air conditioning system (not shown) and for controlling the evaporator (110), and includes a first temperature sensor (111), a second temperature sensor (112), a controller (113), a first connection part (115), a second connection part (114), a third connection part (116), a connection body (117), and a heater operating part (118). The first temperature sensor (111) is installed in the evaporator (110) and measures the temperature of the evaporator (110). The second temperature sensor (112) is installed in the evaporator (110), but is installed at a different point from where the first temperature sensor (111) is installed to measure the temperature of the evaporator (110). The heater control unit (118) receives an operation signal from the outside. The controller (113) controls the evaporator (110) based on the signal input to the heater control unit (118). The third connection unit (116) connects the heater control unit (118) and the controller (113). The second connection unit (114) is connected to the controller (113). The first connection unit (115) is connected to the first temperature sensor (111) and the second temperature sensor (112), respectively. The above connecting body (117) is connected to the first connecting part (115) and the second connecting part (114). Referring to FIG. 4, a control method for a vehicle air conditioning system that controls the evaporator by measuring the temperature of the evaporator during a cooling and heating mode according to the present invention includes a measurement step (A), a selection step (B), and an execution step (C). Here, when the evaporator (110) is viewed from the front, the first temperature sensor (111) and the second temperature sensor (112) are respectively placed at selected points (110c) where a plurality of virtual horizontal lines (110a) arranged vertically spaced apart from each other and a plurality of virtual vertical lines (110b) arranged horizontally spaced apart from each other intersect each other. Here, the lowest temperature among the temperatures measured at the intersection point (110c) during the cooling mode is selected, and referring to FIG. 3, the lowest temperature among the temperatures measured at the intersection point (110c) during the heating/dehumidification mode is selected, and the first temperature sensor (111) for cooling and the second temperature sensor (112) for heating/dehumidification are respectively installed at each point. At this time, the temperature at the intersection point (110c) where the second temperature sensor (112) is installed becomes equal to or lower than the temperature at the intersection point (110c)