KR20110065130A - Air conditioning system for automotive vehicles - Google Patents

Abstract

PURPOSE: An air conditioning device for a vehicle is provided to prevent the rotating speed of a blower from becoming decreased if outdoor temperature is very high or low. CONSTITUTION: An air conditioning device for a vehicle comprises a blower(14), a blower control device(20) and a controller(40). The blower sucks internal and external air to send it to the indoor space of the vehicle. The blower control device decreases the number of rotation of the blower in inverse proportion to vehicle speed to compensate the inflow of wind due to the driving of the vehicle which is increased in proportion to the vehicle speed. If the external temperature of the vehicle reaches a specific range, the controller restricts the operation of the blower control device to cancel air-volume compensation due to the inflow of the wind due to the driving of the vehicle.

Description

Air Conditioning System for Vehicles {AIR CONDITIONING SYSTEM FOR AUTOMOTIVE VEHICLES}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly, to a vehicle air conditioner capable of keeping the temperature inside a vehicle cabin comfortable at all times regardless of the outside air temperature and the running wind inflow.

An air conditioner is installed in a car to cool and heat a room.

As shown in FIG. 1, the air conditioner includes an air conditioner case 10, and an intake door 12, a blower 14, and an evaporator 16 inside the air conditioner case 10. ) And a heater 18 are installed.

The intake door 12 selectively opens the outside airway inlet 12a or the inside airway inlet 12b while rotating between the outside air mode position A and the inside air mode position B. FIG. Thus, the air or bet can be selectively introduced.

The blower 14 sucks the outside air or the inside air through the inside and outside air inlets 12b and 12a and then blows the sucked inside and the outside air into the inner passage 10a of the air conditioning case 10.

The evaporator 16 cools the air blown from the blower 14 and supplies it to the vehicle interior. Therefore, the interior of the vehicle is cooled.

The heater 18 heats the air blown from the blower 14 and supplies it to the vehicle interior. Therefore, the vehicle interior is heated.

On the other hand, such a conventional air conditioner, when running in the open air intake opening 12a, there is a disadvantage that the running wind generated during the run is introduced into the vehicle interior through the outdoor air intake 12a, due to this disadvantage It is pointed out that the indoor cooling and heating efficiency is lowered.

In particular, the faster the driving speed of the vehicle (hereinafter, abbreviated as "vehicle speed"), there is a problem that the air volume of the driving wind flowing into the cabin increases, and the faster the vehicle speed, the more efficient the cooling and heating efficiency in the cabin. The drawback of this sharp drop is pointed out.

On the other hand, as a method to compensate for this, there is a blower control device 20 (see Fig. 2) for controlling the rotational speed of the blower 14 in inverse proportion to the vehicle speed.

As shown in FIG. 2, the blower control device 20 controls the rotation speed of the blower 14 according to the vehicle speed detecting means 22 and the vehicle speed input from the vehicle speed detecting means 22. By detecting the vehicle speed, and then inversely proportional to the detected vehicle speed to reduce the rotational speed of the blower (14). As a result, the faster the vehicle speed, the lower the amount of air discharged into the vehicle interior.

For example, when the vehicle speed is 80km / h, the rotational speed of the blower 14 is reduced by about 10%, and when the vehicle speed is 100km / h, the rotational speed of the blower 14 is reduced by about 15%. . Therefore, the amount of air discharged into the vehicle compartment is reduced in inverse proportion to the vehicle speed. Therefore, the inflow amount of the traveling wind increased in proportion to the vehicle speed is compensated for by the discharge wind volume of the blower 14.

By the way, the conventional blower control device 20 is a structure that reduces the rotational speed of the blower 14 unconditionally if the vehicle speed is high, regardless of the outside temperature, if the outside air temperature is very high or very low and the cooling and heating load is large Even if the vehicle speed is high, there is a disadvantage that the rotational speed of the blower 14 is unconditionally reduced.

And because of these disadvantages, when the cooling and heating load is large and the vehicle speed is fast, there is a problem that the amount of cold air or warm air flowing into the cabin significantly reduced. Because of these problems, when the cooling and heating load is large and the vehicle speed is fast, the drawback is that the cooling and heating efficiency in the interior of the vehicle is drastically lowered, whereby the comfort in the interior is remarkably lowered.

The present invention has been made to solve the conventional problems as described above, the object of the air temperature is very high or very low, when the cooling and heating load is large, by configuring to limit the operation of the blower control device, The present invention provides a vehicle air conditioner capable of preventing a phenomenon in which a cooling and heating efficiency of a vehicle is lowered when a heating load is large and a vehicle speed is fast.

Another object of the present invention is to prevent the phenomenon of cooling and heating efficiency in the cabin when the cooling and heating load is large and the vehicle speed is fast, thereby keeping the temperature inside the cabin comfortably at all times regardless of the outside temperature and the vehicle speed. To provide a vehicle air conditioning system.

In order to achieve the above object, the vehicle air conditioner of the present invention, in the vehicle air conditioner comprising a blower for sucking the internal and external air and blowing into the vehicle interior, to compensate for the inflow of the interior of the running wind increased in proportion to the vehicle speed A blower control device for reducing the rotational speed of the blower in inverse proportion to a vehicle speed; When the outside temperature of the vehicle reaches a specific region, it characterized in that it comprises a controller for limiting the operation of the blower control device, so that the air volume compensation due to the inflow of the running wind can be released.

Preferably, the apparatus further includes an outside air temperature sensing means for sensing an outside air temperature of the vehicle, wherein the controller is configured such that the outside air temperature input from the outside air temperature sensing means is equal to or less than a first preset reference temperature or is higher than the first reference temperature. The operation of the blower control device may be limited so that the air volume compensation according to the inflow of the driving wind may be canceled when the set temperature is higher than the second reference temperature.

According to the vehicle air conditioner according to the present invention, when the outside air temperature is very high or very low, since the structure of the blower control device is restricted, when the outside air temperature is very high or very low, the rotational speed of the blower is reduced It can prevent. Therefore, there is an effect that can prevent the reduction in cooling and heating efficiency in the vehicle interior due to the reduction of the rotational speed of the blower.

In addition, when the outside air temperature is very high or very low, it is possible to prevent the reduction of cooling and heating efficiency in the cabin due to the decrease in the rotational speed of the blower. Therefore, the temperature inside the cabin is related to the running air inflow according to the outside temperature and the vehicle speed. There is always an effect that can keep you comfortable.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a vehicle air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a view showing the configuration of a vehicle air conditioner according to the present invention. First, before looking at the features of the vehicle air conditioner according to the present invention, a brief description of the vehicle air conditioner with reference to FIG.

The vehicle air conditioner includes an air conditioning case 10, and an intake door 12, a blower 14, an evaporator 16, and a heater 18 are provided inside the air conditioning case 10.

The intake door 12 selectively opens the outside airway inlet 12a or the inside airway inlet 12b while rotating between the outside air mode position A and the inside air mode position B. FIG. Thus, the air or bet can be selectively introduced.

The blower 14 sucks the outside air or the inside air through the inside and outside air inlets 12b and 12a and then blows the sucked inside and the outside air into the inner passage 10a of the air conditioning case 10.

The evaporator 16 cools the air blown from the blower 14 and supplies it to the vehicle interior. Therefore, the interior of the vehicle is cooled.

The heater 18 heats the air blown from the blower 14 and supplies it to the vehicle interior. Therefore, the vehicle interior is heated.

The air conditioner includes a blower control device 20 that controls the rotational speed of the blower 14 in accordance with the vehicle speed.

The blower control device 20 includes a vehicle speed detecting means 22 and a controller 24 for controlling the rotational speed of the blower 14 in accordance with the vehicle speed of the vehicle speed detecting means 22.

The blower control device 20 detects the vehicle speed, and then outputs a “wind volume compensation signal X” corresponding to the detected vehicle speed to reduce the rotation speed of the blower 14. As a result, the faster the vehicle speed, the lower the amount of air discharged into the vehicle interior. Therefore, the amount of in-vehicle inflow of the traveling wind, which is increased in proportion to the vehicle speed, is compensated by the amount of discharge wind of the blower 14.

Next, the features of the vehicle air conditioner according to the present invention will be described in detail with reference to FIG. 3.

First, the air conditioning apparatus of the present invention is provided with an outdoor air temperature detecting means 30 for detecting the outside air temperature of the vehicle.

The outside air temperature sensing means 30 includes a temperature sensor 32 and detects the outside air temperature of the vehicle, and then inputs the sensed outside air temperature data to the controller 40 to be described later.

And the air conditioning apparatus of the present invention is provided with the controller 40 which controls the blower control apparatus 20 according to the outdoor air temperature input from the outside air temperature sensing means 30.

The controller 40 includes a microprocessor and includes a comparator 42 and a controller 44.

The comparator 42 compares whether the outside air temperature input from the outside air temperature sensing means 30 is equal to or less than the first reference temperature set in advance or above the second reference temperature set higher than the first reference temperature.

As a result of the comparison by the comparison section 42, the control section 44 outputs the "wind volume compensation cancel signal Y" when the outside temperature is below the first reference temperature or above the second reference temperature, so that the blower control device ( 20) limit the operation.

Therefore, the blower control apparatus 20 cannot control the rotational speed of the blower 14 according to a vehicle speed. Thus, when the outside air temperature is lower than the first reference temperature or higher than the second reference temperature, the rotational speed of the blower 14 is not reduced no matter how fast the vehicle speed is.

As a result, when the outside air temperature is below the first reference temperature or above the second reference temperature, no matter how fast the vehicle speed is, the amount of cold air or warm air flowing into the cabin is not lowered. Therefore, it is possible to keep the temperature in the cabin comfortable at all times regardless of the outside temperature and the vehicle speed.

Here, it is preferable that the first reference temperature built in the comparator 42 is set to 0 ° C, and the second reference temperature is set to 30 ° C.

This is because when the outside air temperature is below 0 ° C or above 30 ° C, if the number of rotations of the blower 14 is reduced to reduce the amount of discharge air flow into the cabin, the temperature in the cabin is rapidly lowered or rises sharply. It is because comfort falls rapidly.

Next, an operation example of the air conditioner having such a configuration will be described with reference to FIGS. 3 and 4.

First, referring to FIG. 4, in the state in which the air conditioner is turned on (S101), the outside air temperature is sensed (S103).

When the outside temperature is detected, it is determined whether the detected outside temperature is less than or equal to the first reference temperature (S105). For example, it is determined whether it is 0 degrees C or less.

If it is determined that the first reference temperature is lower than or equal to the first reference temperature, the controller 40 has a low outside air temperature. Therefore, when the number of revolutions of the blower 14 is reduced to compensate for the volume of air caused by the inflow of the running wind, the controller 40 is turned on. It is determined that the skill is reduced so much that the temperature in the vehicle room drops rapidly, and the " airflow compensation cancel signal Y " is output (S107). Then, the operation of the blower control device 20 is restricted according to the “air volume compensation release signal Y” (S109).

Therefore, the blower control device 20 does not reduce the rotational speed of the blower 14. As a result, the amount of warm air flowing into the cabin is not reduced. This makes it possible to keep the temperature inside the vehicle comfortable.

On the other hand, if it is determined that the temperature is not less than the first reference temperature (S105-1), it is again determined whether the outside temperature input from the outside temperature sensing means 30 is greater than or equal to the second reference temperature (S111). For example, it is determined whether it is 30 degreeC or more.

If it is determined that the second reference temperature is higher than or equal to the second reference temperature, since the outside air temperature is too high, the controller 40 reduces the number of revolutions of the blower 14 to compensate for the air volume caused by the inflow of the running wind. It is determined that the amount is so reduced that the temperature in the vehicle room rises sharply, and outputs the "airflow compensation cancel signal Y" (S107). Then, the operation of the blower control device 20 is restricted according to the “air volume compensation release signal Y” (S109).

Therefore, the blower control device 20 does not reduce the rotational speed of the blower 14. As a result, the amount of cold air flowing into the vehicle interior is not reduced. This makes it possible to keep the temperature inside the vehicle comfortable.

On the other hand, if it is determined that the temperature is not equal to or greater than the second reference temperature (S111-1), the controller 40 erases the " airflow compensation cancel signal Y " (S113). Thus, the blower control device 20 can be operated (S115). This makes it possible to control the rotational speed of the blower 14 in inverse proportion to the vehicle speed.

The air conditioner of the present invention having such a configuration has a structure that restricts the operation of the blower control device 20 when the outside air temperature is very high or very low, and therefore, when the outside air temperature is very high or very low, the blower 14 It is possible to prevent the rotation speed of) from decreasing. Therefore, it is possible to prevent the reduction in cooling and heating efficiency in the cabin due to the reduction of the rotational speed of the blower 14.

In addition, when the outside air temperature is very high or very low, it is possible to prevent the reduction of cooling and heating efficiency in the cabin due to the reduction of the rotational speed of the blower 14, the running wind according to the outside temperature and vehicle speed It can be kept comfortable at all times regardless of inflow.

Next, FIG. 5 and FIG. 6 are views showing another embodiment of the outside temperature sensing means 30 constituting the air conditioning apparatus of the present invention.

The outside temperature sensing means 30 of another embodiment includes a mode detecting sensor 50.

The mode detecting sensor 50 is a sensor for detecting a current mode state of the air conditioning apparatus that changes according to the outside temperature, and serves to indirectly sense the outside temperature by detecting the current mode state.

That is, as shown in FIG. 6, the air conditioning apparatus of the automatic control method is a vent mode or a bi level in a high temperature section in which the outside air temperature needs to be cooled, for example, in summer, when the temperature rises to 30 ° C. or higher. Cools while switching to Bi-Level Mode for a certain time. In the case of a low temperature section in which the outside air temperature needs to be heated, for example, in winter, when the temperature is lowered to 0 ° C. or less, the heater is heated while switching to the floor mode for a predetermined time. In addition, in the spring and autumn, where the outside temperature is between the hot section and the cold section, for example, between 0 ° C and 5 ° C, air / heating is performed while mixing in the floor mode, the bi-level mode, and the vent mode.

Therefore, when the current mode state of the air conditioner is detected, it is possible to indirectly detect whether the temperature of the outside air is 30 ° C. or higher, 0 ° C. or lower, or between 0 ° C. and 5 ° C.

For reference, the vent mode is a mode for discharging the air passing through the evaporator 16 or the heater 18 in the direction of the driver and passenger face. In addition, the bi-level mode is a mode for discharging air passing through the evaporator 16 or the heater 18 to the driver's and passenger's face and the floor surface of the room. The floor mode is a mode for discharging air passing through the evaporator 16 or the heater 18 to the floor surface of the room.

Referring again to FIG. 5, the outside temperature sensing means 30 of another embodiment further includes a conversion output unit 52.

The conversion output unit 52 is provided with a microprocessor, and serves to convert the current mode state input from the mode detection sensor 50 into a corresponding ambient temperature and input the same to the controller 40.

That is, when the mode input from the mode detection sensor 50 is maintained for a predetermined time in the vent mode or the bi-level mode, the outside air temperature is converted to a high temperature section, for example, 30 ° C., and the mode input from the mode detection sensor 50. Is maintained in the floor mode for a certain time, the outside temperature is converted to a low temperature section, for example, 0 ℃, if the mode input from the mode sensor 50 is mixed with the floor mode, bi-level mode and vent mode The outside air temperature is converted into an intermediate section of the high / low temperature section, for example, between 0 and 5 ° C. Then, the converted outside temperature is input to the comparator 42 of the controller 40.

Here, of course, the conversion output unit 52 has a built-in outside air temperature corresponding to the current mode state. That is, 30 ° C corresponding to the operation of "vent mode and bi-level mode", 0 ° C corresponding to the operation of "floor mode", 0-5 ° C corresponding to the operation of "floor mode and bi-level mode and vent mode". Is preset to the outside temperature.

According to the outside temperature sensing means 30 of another embodiment having such a configuration, since it is a structure for sensing the outside temperature through the mode state of the air conditioning apparatus, there is no need for a separate temperature sensing sensor for sensing the outside temperature. Therefore, the number of parts can be reduced and the number of parts can be reduced, so that the effect of cost reduction can be expected.

Next, Figures 7 and 8 are views showing another embodiment of the outside temperature sensing means 30 constituting the air conditioning apparatus of the present invention.

The outdoor air temperature sensing means 30 of another embodiment includes a blower applied voltage sensor 60.

The blower applied voltage sensor 60 is a sensor for detecting a current of the blower 14 applied voltage of the air conditioning apparatus that is changed according to the outside temperature, and indirectly detects the outside temperature by sensing the applied voltage of the current blower 14. Play a role.

That is, the air conditioning apparatus of the automatic control system, as shown in Figure 8, in the high temperature section where the outside air temperature needs to cool, for example, in the summer season when the temperature rises above 30 ℃, and the low temperature section where the outside air temperature requires heating, For example, in winter, when the temperature is lowered to 0 ° C. or lower, the blower 14 is applied with a voltage of 4.5V or higher to cool and heat.

Therefore, when the current applied voltage of the blower 14 is sensed, it is possible to detect whether the temperature of the outside air is 30 ° C. or more or 0 ° C. or less.

Referring again to FIG. 7, the outside temperature sensing means 30 according to another embodiment further includes a conversion output unit 62.

The conversion output unit 62 is provided with a microprocessor, and converts the current blower 14 applied voltage input from the blower applied voltage sensor 60 into a corresponding external temperature to be input to the controller 40. do.

That is, when the applied voltage of the blower 14 input from the blower applied voltage sensor 60 is 4.5V or more, the outside temperature is converted into a high temperature section or a low temperature section, for example, 30 ° C or 0 ° C. Then, the converted outside temperature is input to the comparator 42 of the controller 40.

Here, of course, the conversion output unit 62 has a built-in outside air temperature corresponding to the current blower 14 applied voltage. In other words, 30 ° C and 0 ° C corresponding to the blower 14 applied voltage of 4.5V are preset to the outside air temperature.

According to the outside temperature sensing means 30 of another embodiment having such a configuration, since the outside temperature is sensed through the applied voltage of the blower 14, a separate temperature sensing sensor for sensing the outside temperature is unnecessary. Therefore, the number of parts can be reduced and the number of parts can be reduced, so that the effect of cost reduction can be expected.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

1 and 2 is a view showing a conventional vehicle air conditioner,

3 is a view showing features of the vehicle air conditioner according to the present invention;

4 is a flowchart showing an operation example of the vehicle air conditioner according to the present invention;

5 is a view showing another embodiment of the outside temperature sensing means constituting the vehicle air conditioner of the present invention;

6 is a graph showing the state of the mode of the air conditioner according to the outside temperature,

7 is a view showing another embodiment of the outside air temperature sensing means constituting the vehicle air conditioner of the present invention;

8 is a graph showing an applied voltage of a blower for each ambient temperature.

♣ Explanation of symbols for main part of drawing ♣

10: Air Conditioning Case 12: Intake Door

12a: entrance to the airway 12b: entrance to the airway

14: Blower 16: Evaporator

18: Heater 20: Blower Control

22: vehicle speed detection means 24: control unit

30: outside temperature sensing means 40: controller

42: comparison unit 44: control unit

50: mode detection sensor 52: conversion output unit

60: blower voltage detection sensor 62: conversion output unit

Claims (4)

In the vehicle air conditioner comprising a blower 14 for sucking the inside and outside air and blowing into the cabin, A blower control device (20) for reducing the number of revolutions of the blower (14) in inverse proportion to the vehicle speed so as to compensate the inflow amount of the driving wind increased in proportion to the vehicle speed; When the outside air temperature of the vehicle reaches a specific region, for the vehicle characterized in that it comprises a controller 40 for limiting the operation of the blower control device 20 so that the air volume compensation according to the inflow of the running wind can be released. Air conditioning system. The method of claim 1, It further comprises an outdoor air temperature detecting means 30 for detecting the outside air temperature of the vehicle, The controller 40 is adapted to the inflow of the running wind when the outside air temperature input from the outside air temperature detecting means 30 is equal to or less than a first preset reference temperature or above a second reference temperature set to be higher than the first reference temperature. Vehicle air conditioning apparatus, characterized in that to limit the operation of the blower control device 20 so that the air volume compensation according to. 3. The method of claim 2, The outside temperature sensing means 30, A mode detecting sensor 50 for detecting a current mode state of the air conditioning apparatus that changes according to the outside temperature; The external air temperature corresponding to the mode state of the air conditioner is pre-built, and converts the current mode state input from the mode detecting sensor 50 into the external temperature corresponding thereto and inputs it to the controller 40 ( Vehicle air conditioning apparatus comprising a 52). 3. The method of claim 2, The outside temperature sensing means 30, A blower applied voltage sensor 60 for sensing a current blower 14 applied voltage of the air conditioner which is changed according to the outside temperature; The outside air temperature corresponding to the blower 14 applied voltage is pre-built, and converts the current blower 14 applied voltage input from the blower applying voltage sensor 60 into the corresponding outside temperature to the controller 40. Vehicle air conditioning apparatus comprising a conversion output unit 62 for inputting.

Images