KR100737156B1 - Air conditioning system and method for improving bad smell - Google Patents

Abstract

A blower speed control unit and method for enhancing bad smell are provided to keep comfort air inside a vehicle by inhibiting blower operation until cold air is capable of being supplied. A blower speed control unit for enhancing bad smell includes an evaporator core(310), an evaporator sensor(311), a blowing controller(320), and a blower(330). The evaporator sensor is mounted on the evaporator core for preventing an evaporator from freezing by detecting a temperature of the evaporator core and for providing the temperature of the evaporator core which is reference for controlling the blower. The blowing controller controls a blowing control switch(110), an ignition determination unit(200), and the blower by using temperature data of the evaporator core outputted from the evaporator sensor.

Description

Air conditioner blower speed control device and method for improving odor {Air Conditioning System and Method for Improving Bad Smell}

1 is a view showing a flow rate control graph of the air conditioning blower of a vehicle equipped with a general air conditioner.

Figure 2 is a view showing the air volume control switch of the vehicle with an air conditioner to which the present invention is applied.

Figure 3 is a block diagram of the air conditioning blower speed control apparatus according to the present invention.

4 is a view showing a blower speed control graph according to an exemplary embodiment of the present invention when the temperature of the EVA sensor is less than the reference value.

5 is a view showing a blower speed control graph according to an exemplary embodiment of the present invention when the temperature of the EVA sensor is greater than or equal to a reference value.

* Description of the symbols for the main parts of the drawings *

100: temperature control switch 110: air flow control switch

300: air conditioning blower speed control device 310: EVA core

311: EVA sensor 320: ventilation operation control part

330: blower 200: ignition determination unit

The present invention relates to an air conditioner blower speed control device and method for improving the odor to improve the unpleasant smell by controlling the speed of the air conditioner blower.

In general, an air conditioner mounted on a vehicle is classified into a cooling device that cools the air in the car and adds comfort to the occupant, and a heating device that heats the air to give warmth.

The interior of a car is heated by various heat applied from the outside and the inside, such as the sun, the atmosphere, the road or the engine, and the seats and instruments are heated.In this way, when the air inside the car gets hot, the air conditioner is operated. It will run.

The heating device is a heater unit mounted on a pipeline that is to receive a portion of the engine cooling water and forced to blow the heat emitted by the hot water to force the air to warm to guide it to the interior of the car. It is composed of a blower (blower), and absorbs heat from the heater unit to receive a heat source from the hot water for engine cooling, heated air is supplied to the vehicle interior through the blower to increase the temperature inside the heating function.

More specifically, the heater unit is composed of a heater core through which the engine coolant flows in the heater case, an air direction control mode door, a temperature control air mix door, and the like. Heater core is a heat exchanger that circulates the engine and heats the air supplied from the outside by heat exchange between the tube and the fin while hot coolant that absorbs the heat generated during combustion circulates through the heater core. Qi.

On the other hand, a cooling device (aka air conditioner) is composed of a compressor, a condenser, an expansion valve and an evaporator. The evaporator of the cooling device converts into superheated steam by exchanging heat with air inside and outside the car in the state of wet saturated steam introduced through the expansion process. The heat deprived of the air is changed to a low temperature and low humidity state and discharged to the interior of the vehicle by a blower (blower) can maintain the interior environment of the vehicle comfortably.

1 is a graph illustrating an air volume control of an air conditioner blower of a vehicle equipped with a general air conditioner.

The air conditioning blower is generally designed to operate according to the intensity set by the user through the temperature control switch or the air volume control switch. Referring to FIG. 1, after being set to ON in an ignition OFF state, it is controlled to reach a target air volume with a maximum delay time of 12 seconds. The graph of FIG. 1 illustrates a control mechanism in the case of a general automatic air conditioner, and in the case of a manual air conditioner, a control time from the minimum stage (1 stage) to the target stage is usually controlled to 3 seconds.

On the other hand, since the heat exchange in the EVA core in the air conditioning unit during the air conditioning operation, condensed water is generated. However, when the condensed water is not evaporated, mold is generated in the EVA core and the EVA unit, thereby causing a problem. These odors increase as the operating period of the vehicle increases, and the unpleasant discomfort felt by a person becomes more severe when the vehicle temperature is high.

In order to solve the above problems, the air conditioner blower speed control apparatus for improving the odor can be improved by limiting the speed of the air flow up to a temperature that is effective in reducing the odor in the vehicle, so as to improve the sense of smell And a method thereof.

According to an aspect of the present invention, an air conditioner blower speed control method for improving the smell is directed to a blower speed control of a vehicle equipped with an auto air conditioner, comprising: measuring a temperature of an EVA core; Checking whether the measured temperature of the eva core is above a blower control threshold temperature; And when the ignition is turned on while the air volume control switch is turned on, the blower is operated at a constant operating voltage V _s for an initial predetermined time T _s after the ignition is turned on, and according to the temperature of the eva core, the blower operating voltage in the evaporator unit. Operating the blower at a different V _s .

The step of operating the blower at a constant voltage may include an initial predetermined time for operating the blower when the temperature of the EVA core is lower than the blower control threshold temperature, T _s1 , and the temperature of the eva core when the blower control threshold temperature is higher than the blower control threshold temperature. When the initial constant time for the operation of the blower is T _s2 and the initial core voltage is V _s1 and V _s2 when the temperature of the EVA core is lower than or equal to the blower control threshold temperature, the following relation is established. It features.

T _s1 ≤ T _s2 , V _s1 ≥ V _s2

The control of the blower operating voltage when the temperature of the EVA core is equal to or higher than the blower control threshold temperature divides T _s2 into time sections of T _{s21 and} T _s22 , and _adjusts the blower operating voltage value at T _s21 . It is characterized in that it is smaller than the blower operating voltage value at T _s22 .

The air conditioning blower speed control method for improving the smell may further include, after the initial predetermined time elapses, firstly increasing an operating voltage of the blower.

The air conditioner blower speed control device for improving the smell according to another aspect of the present invention, when the ignition is ON while the EVA sensor and the air flow control switch for measuring the temperature of the EVA core, during the initial constant time T _s after the ignition ON And a blower operation control unit for operating the blower by operating the blower at a constant operating voltage V _s and varying the blower operating voltage V _s in the evaporator unit according to the temperature of the eva core.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the drawings.

Figure 2 shows a temperature control and air volume control switch of the air conditioner equipped vehicle to which the present invention is applied.

The temperature control switch and the air volume control switch may appear slightly differently depending on the manual air conditioner, the automatic air conditioner, and the air conditioner model. 2 shows the temperature control switch 100 and the air volume control switch 110 of a typical automatic air conditioner. The automatic air conditioner is a system that provides the driver with the comfort desired by considering various conditions regarding the air conditioning itself. The purpose of the automatic air conditioner is not much different from the manual air conditioner. However, the functions for operating the air conditioner are only different, for example, the control of the air conditioning temperature.

To maintain the room temperature at the desired temperature, the cooling capacity must be controlled according to the cooling load. It is necessary to control the cooling capacity in response to changes in external conditions for cooling, such as sunny daytime, morning or evening. According to the cooling feeling of the occupant is adjusted using the temperature control switch 100 shown in Figure 1 which is installed on the control panel. In the case of an automatic air conditioner, when the desired temperature is set, the system adjusts the cooling capacity regardless of the change in external conditions to maintain the room temperature at the indicated temperature at all times. In addition, according to the control of the air volume control switch 110, it is possible to adjust the air volume per unit time flowing into the vehicle.

The air conditioner is a compressor that compresses a refrigerant that is easily liquefied and vaporized even at room temperature or a low temperature, and converts the gas into a gas of high temperature and high pressure, and a condenser that cools the compressed refrigerant from the compressor to a liquid of medium temperature and high pressure. And an expansion valve for converting the refrigerant cooled from the condenser into a liquid state of low temperature and low pressure, which are easily evaporated at room temperature, and an evaporator for evaporating the reduced pressure refrigerant from the expansion valve to a gas state of low temperature and low pressure. It is composed.

More specifically, the eva core in the evaporator converts into superheated steam by exchanging heat with air inside and outside the car in the state of the wet vaporized steam introduced through the expansion process. The heat deprived of the air is changed to a low temperature and low humidity state and discharged to the interior of the vehicle by a blower (blower) can maintain the interior environment of the vehicle comfortably. Here, when moisture in the air is condensed by the cooling action to generate moisture, it is important to facilitate drainage since the condensed water remains on the outer surface of the EVA core to reduce the area through which air can pass.

An expansion valve is installed at the inlet of the evaporator to convert the high temperature and high pressure back refrigerant flowing from the condenser into a low temperature, low pressure wet saturated vapor state through throttling to facilitate evaporation in the evaporator.

The condenser is equipped with a cooling fan to release the air that rises when the refrigerant is cooled to the outside atmosphere, and the evaporator is provided with a blower to cool the inside of the car by forcibly blowing the cooled air when the refrigerant evaporates. Let's do it.

In particular, the automatic air conditioner uses various sensors (external air sensor, internal air sensor, solar sensor, eva sensor, humidity sensor, AQS) to accurately measure the outside air temperature, solar radiation, eva discharge temperature, external harmful gas, in-vehicle humidity and car interior temperature. Sensing and inputting the information into the microcomputer, it automatically controls the discharge temperature, discharge air volume, compressor (compressor) ON / OFF, switching the air inlet and inlet, etc., to maintain a comfortable car air and temperature.

Figure 3 shows a block configuration of the air conditioning blower speed control apparatus according to the present invention.

The air conditioner blower speed control apparatus according to the present invention includes an EVA sensor 311, a blower operation control unit 320, a blower 330, and the like, which are largely mounted on the EVA core 310, and include an EVA sensor 311 and air volume control. The operation of the blowing operation control unit 320 is changed according to the output of the switch 110 and the ignition determination unit 200.

The EVA sensor 311 is mounted on the EVA core 310 for the purpose of detecting the temperature of the EVA core 310 to prevent freezing of the evaporator. In the present invention, the temperature of the EVA core serving as a reference value for controlling the blower is determined. Will be provided.

The blowing operation control unit 320 controls the blower 330 by using temperature data of the EVA core output from the air flow control switch 110, the ignition determination unit 200, and the EVA sensor 311.

That is, the blowing operation control unit 320 is measured from the eva sensor 311 when the air flow control switch 110 is turned on, when the ignition determination unit 200 reports that the ignition is turned on in the OFF state. Check whether the temperature of the eva core 310 is equal to or greater than the blower control threshold temperature, and operate the blower by varying the blower operating voltage Vs in the evaporator unit during the initial constant time Ts after the ignition is turned on according to the eva core temperature. do.

More specific operations of the blowing operation controller 320 will be described in detail with reference to the graphs of FIGS. 4 and 5 below.

4 illustrates a blower speed control graph according to an exemplary embodiment of the present invention when the temperature of the EVA sensor is lower than the reference value.

4 shows the blower control pattern when the horizontal axis represents time and the vertical axis represents operating voltage, and the temperature of the EVA sensor is less than 30 ° C.

According to the present invention, when the occupant turns on the engine, that is, is turned ON in the ignition OFF state, the driving voltage stays in AUTO LOW for a predetermined time. In other words, the driving voltage is maintained at a constant level without being raised for a predetermined time. In FIG. 4, it can be seen that this predetermined time is set to 12 seconds. Here, AUTO LOW is a case of an automatic air conditioner, and in the case of a manual air conditioner, the name according to the control step is changed to LOW (stage 1).

Referring to FIG. 4, the blower is controlled so that the driving voltage is 24 seconds after the ignition is turned on and the driving voltage increases to 24 seconds from the time point when the ignition is turned on. 12 seconds after the ignition ON from 24 to 24 seconds, as shown in Figure 1, it can be seen that it is controlled to reach the AUTO HI, which is a target air volume set by the occupant within 12 seconds immediately increasing functionally from AUTO LOW.

The blower speed control according to the present invention can be seen that the key is to delay the general blower speed control procedure after a certain time. As such, the reason for suppressing the blower speed in the present invention is that the smell caused by the mold generated inside the eva core and the evaporator unit, which may be generated during the operation of the cooling apparatus, may be felt by a human when the temperature is low. This is due to the rule of thumb that the degree of discomfort is reduced.

In other words, the passengers are not allowed to increase the air volume of the blower at the same time that the air conditioner starts to operate, but wait for the time until the air conditioner is ready to supply enough cool air, and then increase the air flow rate of the air blower. It is a feature of the present invention to provide as little as possible an unpleasant odor. Therefore, the time of 12 seconds shown in the graph of FIG. 4 may be set differently according to the characteristics of the air conditioner mounted on the vehicle.

5 is a graph illustrating a blower speed control according to an exemplary embodiment of the present invention when the temperature of the EVA sensor is greater than or equal to a reference value.

FIG. 5 is a graph of the blower control when the temperature of the EVA sensor is higher than or equal to the reference value, that is, when the temperature of the EVA sensor is higher than or equal to 30 degrees.

In the graph of FIG. 5, it can be seen that after the ignition is turned on, the operating voltage is kept constant at 1.5 V until 12 seconds, and the operating voltage is maintained at AUTO LOW until 12 seconds after 12 seconds. From 18 seconds to 30 seconds, the operating voltage is increased to control AUTO HI at 30 seconds after ignition ON.

The graph of FIG. 5 differs from the graph of FIG. 4 in that it takes a time of 18 seconds to increase the operating voltage of the blower in one dimension in earnest, which means that the temperature of the EVA sensor is less than 30 degrees. It's a much longer time than that.

As such, the reason for varying the control mechanism of the blower's operating voltage according to the temperature of the EVA sensor is that the smell of mold in the evaporator increases when the EVA sensor temperature is high, and the degree of human sensation increases when the temperature is high. It is caused by. Therefore, when the temperature of the EVA core measured by the EVA sensor is high, it is expected that the smell caused by the mold is also severe, and is intended to suppress the operation of the blower until the temperature is somewhat lowered by the cooling device.

Here, the time of 18 seconds to suppress the operation of the blower, 1.5V, the operating voltage from 12 seconds after the ignition ON, etc. is only one embodiment, and the optimum through the evaluation, such as experiments according to the characteristics of the vehicle and the blower of the vehicle Time, the optimum operating voltage should be determined.

As described above, the embodiments of the present invention are only examples, and other modifications may be applied, and all of the modifications will be included in the scope of the present application. For example, instead of setting the blower operating mechanism in two according to the EVA sensor temperature, three or more temperature reference values of the EVA sensor may be set and the blower operating mechanism may be set differently accordingly. That is, those skilled in the art will be able to implement three or more blower operating mechanisms.

According to the present invention, when the temperature is low, the occupant feels less about the smell of mold generated from the EVA unit of the vehicle, and thus, the blower operates from the time of operating the cooling device to the time when cool air can be supplied to some extent. By suppressing this, there is an effect that the passenger can feel the air in the vehicle comfortably.

Claims (8)

In the blower speed control method of a vehicle equipped with a temperature control air conditioner, Measuring the temperature of the EVA core; Checking whether the measured temperature of the eva core is above a blower control threshold temperature; And When the ignition is turned on while the air flow control switch is turned on, the blower is operated at a constant operating voltage V _s for an initial predetermined time T _s after the ignition is turned on, but according to the temperature of the eva core, the blower operating voltage V _s in the evaporator unit. Air conditioning blower speed control method for improving the odor comprising the step of operating the blower. The method according to claim 1, Operating the blower at a constant voltage, The initial constant time for operating the blower when the temperature of the eva core is below the blower control threshold temperature is T _s1 , and the initial constant time for operating the blower when the temperature of the eva core is above the blower control threshold temperature is T _s2 . When the temperature of the EVA core is less than or equal to the blower control threshold temperature and each initial operating voltage is V _s1 , V _s2 , Air conditioning blower speed control method for improving the odor, characterized in that the following relation holds. T _s1 ≤ T _s2 , V _s1 ≥ V _s2 The method according to claim 2, Control of the blower operating voltage when the temperature of the said EVA core is more than the said blower control threshold temperature, By dividing the T _s2 in the time interval T _{s21, s22} T, the blower operating voltage value at T _s21 A method of controlling the air blower speed for improving odor, characterized in that the control is smaller than the blower operating voltage value at T _s22 . The method according to claim 1, After the initial constant time T _s has elapsed, A method of controlling the air blower speed for improving odor further comprising the step of increasing the operating voltage of the blower primarily. In the blower speed control device of a vehicle equipped with a thermostat, An EVA sensor for measuring the temperature of the EVA core; Wow When the ignition is turned on while the air flow control switch is turned on, the blower is operated at a constant operating voltage V _s for an initial predetermined time T _s after the ignition is turned on, but according to the temperature of the eva core, the blower operating voltage V _s in the evaporator unit. Air conditioning blower speed control device for improving the odor comprising a blow operation control unit for operating the blower by different. The method according to claim 5, The blowing operation control unit, The initial constant time for operating the blower when the temperature of the eva core is below the blower control threshold temperature is T _s1 , and the initial constant time for operating the blower when the temperature of the eva core is above the blower control threshold temperature is T _s2 . When the temperature of the EVA core is less than or equal to the blower control threshold temperature and each initial operating voltage is V _s1 , V _s2 , Air conditioning blower speed control device for improving the odor, characterized in that for controlling the blower to establish the relationship below. T _s1 ≤ T _{s2 ,} V _s1 ≥ V _s2 The method of claim 6, The blowing operation control unit, When the temperature of the EVA core is greater than or equal to the fan control temperature threshold, by dividing the T _s2 in the time interval T _{s21, s22} T, the blower operating voltage value at T _s21 An air blower speed control device for improving odor, characterized in that the blower is controlled to be smaller than the blower operating voltage value at T _s22 . The method of claim 5, The blowing operation control unit, After the initial predetermined time T _s elapses, the air blower speed control device for improving the odor, characterized in that for controlling the blower while increasing the operating voltage of the blower primarily.

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