KR20210128548A - Non heater core air conditioning apparatus and method for controlling temperature using the same - Google Patents

Abstract

The present invention relates to a non-heater core air conditioning apparatus and a temperature control method using the same. In particular, the non-heater core air conditioning apparatus according to the present invention, which is provided to control the temperature of a vehicle, comprises: a determination unit which determines whether to execute the air-conditioning mode of a vehicle; a setting unit which calculates the air conditioning value of the vehicle when the air-conditioning mode is executed, sets the temperature of an evaporator according to the air conditioning value, sets the outdoor air value according to the outdoor air temperature measured by means of a temperature sensor attached on the outside of the vehicle, sets the circulation value according to the air-circulating mode of the vehicle, and sets the blower value according to the current stage of the blower motor of the vehicle; and a control unit which sets the operation temperature of the compressor of the vehicle by using the temperature of the evaporator, the outdoor air value, the circulation value and the blower value according to the stage of the blower motor. Therefore, according to the present invention, the temperature of the evaporator can be adjusted by using the external environment information, the vehicle information and the control information so as to control a discharge temperature which is suitable to various environmental conditions to maximize the pleasantness of the indoor space of the vehicle. Furthermore, the discharge temperature provided to the indoor space of the vehicle can be more precisely controlled than the conventional method of controlling the temperature by applying a manual temperature control (MTC) which is a heater control that can be only manually controlled and a fixing type compressor.

Description

Non-HEATER CORE AIR CONDITIONING APPARATUS AND METHOD FOR CONTROLLING TEMPERATURE USING THE SAME

The present invention relates to a non-heater core air conditioner and a temperature control method using the same, and a non-heater core air conditioner for controlling the temperature of an evaporator using the values of the outside air temperature, the indoor temperature, the number of stages of the blower motor and the compressor, and a non-heater core air conditioner using the same It relates to a temperature control method.

In general, an air conditioner for a vehicle includes a compressor, a condenser, a receiver drier, an expansion valve, and an evaporator.

Refrigerant gas compressed at high temperature and high pressure in the compressor is sent to the condenser and changes into a liquid state through heat exchange with the surrounding air. Impurities are removed from the liquefied refrigerant as it passes through the receiver dryer, and the refrigerant from which impurities are removed passes through the expansion valve and turns into a low-temperature gas.

At this time, the vaporized low-temperature refrigerant flows into the evaporator and heat-exchanges with the surrounding air while passing through it, and the cold air thus cooled is blown into the vehicle through a blower to cool it. The low-temperature gaseous refrigerant that has passed through the evaporator is sent back to the compressor to be compressed at high temperature and high pressure, and the inside of the vehicle is cooled through the circulation of the refrigerant.

The compressor operates continuously, and in this case, when the temperature falls below 0°C, there is a risk that the evaporator may be frozen. Therefore, the evaporator is equipped with a temperature sensor (hereinafter referred to as an Eva sensor), and when the temperature sensed by this sensor falls below 0 °C, the compressor stops and the air conditioner stops. And, when the temperature rises again to 4 ℃ or higher, the compressor is restarted and the air conditioner is operated again.

And, in the case of general air conditioning technologies (HVAC, Heating, Ventilation, Air Conditioning), a heater core and a TEMP door are used to control the discharge temperature desired by the driver.

However, the air conditioning technology without a heater core has a disadvantage in that it is difficult to control the discharge temperature because there is no heat source capable of raising the temperature in the air conditioner.

Vehicles with the existing NON heater core air conditioning system apply only manual temperature control (MTC) and a fixed compressor to perform minimal temperature control.

This minimum temperature control has a problem in that it is difficult to improve indoor comfort because external environmental conditions and control conditions are not considered.

Accordingly, there is a need for a temperature control method that considers external environmental conditions and control conditions.

The technology that is the background of the present invention is disclosed in Korean Patent Registration No. 10-0765726 (published on October 12, 2007).

The technical problem to be achieved by the present invention relates to a non-heater core air conditioning apparatus and method for controlling the temperature of an evaporator using values of an outside air temperature, an inside temperature, the number of stages of a blower motor, and a compressor.

According to an embodiment of the present invention for achieving this technical problem, in the non-heater core air conditioning apparatus for controlling the temperature of a vehicle, a determination unit for determining whether the air conditioner mode of the vehicle is executed, and when the air conditioner mode is executed, the vehicle calculates the air conditioning value of , sets the temperature of the evaporator according to the air conditioning value, sets the outdoor air value according to the outdoor air temperature measured through a temperature sensor attached to the outside of the vehicle, and circulates according to the air circulation mode of the vehicle A setting unit that sets a value and sets a blower value according to the current stage of the blower motor of the vehicle, and the temperature of the evaporator, the outdoor air value, the circulation value and the blower value according to the stage number of the blower motor. and a control unit for setting an operating temperature of the compressor of the corresponding vehicle.

The air conditioning value may be calculated by the following equation.

Air conditioning value = A*set temperature + B*outdoor temperature + C*indoor temperature

Here, A, B, and C are weights of the set temperature, the outdoor temperature, and the indoor temperature, respectively.

The air conditioning value may be divided into a plurality of sections, the temperature of the evaporator may be determined according to a section to which the air conditioning value belongs, and the temperature of the evaporator may be set to increase when the air conditioning value increases.

The control unit, when the current number of stages of the blower motor is less than or equal to the reference stage, it is possible to calculate the operating temperature of the compressor using the following equation.

Compressor stop temperature = (evaporator temperature + outside air value + circulation value) * blower value

Compressor operating temperature = Compressor stop temperature + 1

The control unit, when the current stage number of the blower motor is greater than the reference stage number, may set the operating temperature of the compressor using the following equation.

Compressor stop temperature = evaporator temperature + outside air value + circulation value

Compressor operating temperature = Compressor stop temperature + 1

According to another embodiment of the present invention, in a temperature control method using a non-heater core air conditioner, determining whether an air conditioner mode of a vehicle is executed, calculating an air conditioning value of the vehicle when the air conditioner mode is executed, setting the temperature of the evaporator according to the air conditioning value, setting an outdoor air value according to the outdoor air temperature measured through a temperature sensor attached to the outside of the vehicle, setting a circulation value according to the air circulation mode of the vehicle; setting a blower value according to the current stage of the blower motor of the vehicle, and the temperature of the evaporator, the outdoor air value, the circulation value, and the blower value according to the stage number of the blower motor. setting the operating temperature.

As described above, according to the present invention, by controlling the temperature of the evaporator using external environment information, vehicle information, and control information, it is possible to control the discharge temperature suitable for various environmental conditions, thereby increasing the comfort of the vehicle interior space. .

In addition, it is possible to precisely control the discharge temperature provided to the interior space of the vehicle rather than the conventional method of controlling the temperature by applying a heater control (MTC), which can only be operated manually, and a fixed compressor.

1 is a configuration diagram for explaining a non-heater core air conditioner according to an embodiment of the present invention.
2 is a view for explaining the relationship between the compressor, the evaporator, and the blower motor according to an embodiment of the present invention.
3 is a flowchart illustrating a temperature control method using a non-heater core air conditioner according to an embodiment of the present invention.
FIG. 4 is a diagram for explaining step S310 of FIG. 2 .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated.

Then, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them.

1 is a configuration diagram for explaining a non-heater core air conditioner according to an embodiment of the present invention.

As shown in FIG. 1 , the non-heater core air conditioning apparatus 100 according to the embodiment of the present invention includes a determination unit 110 , a setting unit 120 , and a control unit 130 .

In addition, the non-heater core air conditioner 100 transmits an operation control signal to the compressor 200 , and the compressor 200 regulates the temperature inside the vehicle by discharging air through the evaporator according to the control signal.

The non-heater core air conditioner 100 according to the embodiment of the present invention is a system for controlling the internal temperature of a vehicle. It is characterized in that it does not include a heater core that is a heater device.

First, the determination unit 110 determines whether or not the air conditioner mode of the vehicle is executed.

Here, the air conditioner mode may be changed by the user using a controller provided on a center fascia of a dashboard of the vehicle.

That is, the determination unit 110 determines whether the air conditioner mode of the vehicle is executed by the user.

Next, when the air conditioner mode is executed, the setting unit 120 calculates the air conditioning value of the vehicle, sets the temperature of the evaporator according to the air conditioning value, and the outdoor air value according to the outdoor air temperature measured through a temperature sensor attached to the outside of the vehicle , set a circulation value according to the air circulation mode of the vehicle, and set a blower value according to the current stage of the blower motor of the vehicle.

Then, the controller 130 sets the operating temperature using the temperature of the evaporator, the outdoor air value, the circulation value, and the blower value according to the number of stages of the blower motor, and the compressor 200 of the corresponding vehicle operates at the set operating temperature. ) to transmit a control signal.

Here, the blower motor is a motor attached to the front of the evaporator, and means a motor for rotating an impeller or a rotor for pumping air into the vehicle.

2 is a view for explaining the relationship between the compressor, the evaporator, and the blower motor according to an embodiment of the present invention.

As shown in FIG. 2 , the compressor 200 sends the compressed high-pressure gaseous refrigerant to a condenser installed in the front of a radiator (not shown) of the vehicle.

Then, the condenser converts the compressed high-pressure gaseous refrigerant into a high-pressure liquid refrigerant and sends it to a receiver dryer to remove moisture present in the converted liquid refrigerant.

Then, when the liquid refrigerant from which moisture has been removed is sent to the evaporator in a state in which it is converted into a low-pressure liquid refrigerant through the expansion valve, the evaporator converts the low-pressure liquid refrigerant into a low-pressure gaseous refrigerant.

At this time, when the low-pressure liquid refrigerant is converted into the low-pressure gaseous refrigerant, the temperature around the evaporator decreases because it absorbs heat from the surrounding air.

Then, the low-pressure gaseous refrigerant is sent back to the compressor 200 .

In addition, the blower motor operates the motor according to the set number of stages to send air of a temperature lowered by the evaporator into the vehicle.

That is, through this process, the non-heater core air conditioner 100 may control the temperature of the air blown into the vehicle.

Hereinafter, a method of controlling the temperature of a vehicle using a non-heater core air conditioner according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4 .

3 is a flowchart illustrating a temperature control method using a non-heater core air conditioner according to an embodiment of the present invention.

First, the non-heater core air conditioning apparatus 100 according to the embodiment of the present invention determines whether the vehicle air conditioner mode is executed (S310).

FIG. 4 is a diagram for explaining step S310 of FIG. 3 .

As shown in FIG. 4 , the A/C button 410 and the indoor/outdoor button 420 may be provided in the form of a button pressed by the user, and may be implemented as a method of providing an interface through a display.

In addition, the blower button 430 is provided in the form of a button rotated by the user, and may be implemented by a touch method through a display or a form operated by pressure applied by the user.

As shown in FIG. 4 , the non-heater core air conditioning apparatus 100 according to the embodiment of the present invention determines whether the vehicle's air conditioning mode is executed using whether the A/C button 410 located on the center fascia of the vehicle is activated or not. judge

Next, when the air conditioner mode is executed, the non-heater core air conditioner 100 calculates an air conditioning value of the vehicle and sets the temperature of the evaporator according to the air conditioning value ( S320 ).

In this case, the non-heater core air conditioner 100 calculates the air conditioning value of the vehicle by applying the set temperature, the outdoor temperature, and the indoor temperature to Equation 1 below.

Here, A, B, and C are weights of the set temperature, the outdoor temperature, and the indoor temperature, respectively.

In this case, the weight may be changed according to the state of the vehicle and the external environment, and may be a value preset by the non-heater core air conditioner 100 .

Then, the non-heater core air conditioner 100 differentially sets the evaporator temperature according to the air conditioning value calculated by Equation (1).

At this time, the air conditioning value is divided into a plurality of sections, the temperature of the evaporator is determined according to the section to which the air conditioning value belongs, and the temperature of the evaporator is set to increase when the air conditioning value increases.

For example, the non-heater core air conditioner 100 sets the evaporator temperature to 2.5° C. when the air conditioning value is less than or equal to the first reference value, and when the air conditioning value is greater than the first reference value and less than or equal to the second reference value, the evaporator temperature can be set to 3.5°C.

In addition, if the air conditioning value is greater than the second reference value and less than or equal to the third reference value, the evaporator temperature is set to 4.5°C, and if the air conditioning value is greater than the third reference value and less than or equal to the fourth reference value, the evaporator temperature is selected as 5.5°C and, if the air conditioning value is greater than the fourth reference value, the evaporator temperature is set to 6.5°C.

Here, the boundary value of the section corresponding to the air conditioning value may be changed according to the environment outside the corresponding vehicle and the size of the vehicle.

Next, the non-heater core air conditioner 100 sets an outdoor air value according to the outdoor air temperature measured through a temperature sensor attached to the outside of the vehicle ( S330 ).

At this time, when the measured outdoor air temperature exceeds 30 °C, the outdoor air value is set to -0.5, and when the measured outdoor air temperature is 20 °C or higher and 30 °C or lower, the outdoor air value is set to 0, and the measured outdoor air temperature is 20 If it is less than ℃, the outdoor air value is set to 0.5.

Here, the reference value and the outdoor air temperature value may be set by the user and may be changed according to the state of the vehicle.

Next, the non-heater core air conditioning apparatus 100 sets a circulation value according to the air circulation mode of the vehicle ( S340 ).

As shown in FIG. 4 , the non-heater core air conditioner 100 sets the circulation value according to whether the indoor/outdoor button 420 located on the center fascia of the vehicle is activated.

In this case, the air circulation mode of the vehicle may be set to internal circulation, semi-external air circulation, and external air circulation according to the number of times that the inside/outdoor button 420 is touched.

If the air circulation mode is internal circulation, the non-heater core air conditioner 100 sets the circulation value to 0.6, and if the air circulation mode is semi-outdoor circulation, the non-heater core air conditioner 100 sets the circulation value to 0.3, , when the air circulation mode is outdoor air circulation, the non-heater core air conditioner 100 sets the circulation value to 0.

Here, the internal circulation mode is a mode for circulating air present inside the vehicle in a state in which the air introduced from the outside is blocked, and the outside air circulation mode is a mode for circulating air inside the vehicle using air introduced from the outside.

Next, the non-heater core air conditioner 100 sets a blower value according to the current stage of the blower motor of the vehicle ( S350 ).

That is, as shown in FIG. 4 , the non-heater core air conditioner 100 receives the set number of blower motors through the blower button 430 .

Here, the non-heater core air conditioning apparatus 100 sets the blower value to 1.1 when the number of stages of the blower motor of the current vehicle is set to be less than or equal to two stages, and when the number of stages of the blower motor of the current vehicle is set to be greater than two stages, the blower Set the value to 0.

Next, the non-heater core air conditioner 100 compares the number of stages of the blower motor currently set in the vehicle and the reference stage ( S360 ).

At this time, if the number of stages of the blower motor of the current vehicle is set to be higher than the reference stage, the non-heater core air conditioner 100 calculates the operating temperature of the compressor using the evaporator temperature, the outdoor air value, and the circulation value ( S370 ).

That is, the non-heater core air conditioner 100 calculates the operating temperature of the compressor using Equation 2 below.

On the other hand, if the number of stages of the blower motor of the current vehicle is set equal to or lower than the reference number of stages or less, the non-heater core air conditioner 100 calculates the operating temperature of the compressor using the evaporator temperature, the outdoor air value, the circulation value, and the blower value. (S380).

That is, the non-heater core air conditioner 100 calculates the operating temperature of the compressor using Equation 3 below.

When the number of stages of the blower motor currently set in the vehicle is less than or equal to the reference stage, the non-heater core air conditioner 100 calculates the stop temperature and the operating temperature of the compressor as in Equation 3 by further using the blower value, unlike Equation 2 .

As such, in step S380, the non-heater core air conditioning apparatus 100 calculates the operating temperature of the compressor using the values obtained from steps S320 to S350.

Then, the non-heater core air conditioner 100 sets the operating temperature and the stopping temperature of the compressor according to the values calculated by Equations 2 and 3 (S390).

Then, the non-heater core air conditioner 100 operates or stops the operation of the compressor according to the set compressor operating temperature and stop temperature.

Here, the stop temperature of the compressor is a temperature for stopping the operating compressor, and the operating temperature of the compressor is a temperature for operating the compressor.

That is, when the internal temperature of the corresponding vehicle falls below the stop temperature of the compressor while the non-heater core air conditioner 100 is in operation, the non-heater core air conditioner 100 stops the operating compressor.

Also, when the internal temperature of the vehicle rises above the operating temperature of the compressor while the compressor is stopped, the non-heater core air conditioner 100 operates the compressor.

That is, the operating temperature and the stopping temperature of the compressor are temperatures for operating or stopping the compressor of the corresponding vehicle.

As described above, the non-heater core air conditioner 100 according to the embodiment of the present invention repeats steps S310 to S390 in real time to set the compressor operating temperature of the corresponding vehicle, and operates the compressor of the vehicle in real time according to the set temperature. .

As described above, according to an embodiment of the present invention, by controlling the temperature of the evaporator using external environment information, vehicle information, and control information, the discharge temperature suitable for various environmental conditions is controlled to increase the comfort of the vehicle interior space. can do it

In addition, it is possible to precisely control the discharge temperature provided to the interior space of the vehicle rather than the conventional method of controlling the temperature by applying a heater control (MTC) that can only be operated manually and a fixed compressor.

Although the present invention has been described with reference to the embodiment shown in the drawings, which is merely exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100: non-heater core air conditioner
110: judgment unit, 120: setting unit,
130: control unit, 200: compressor,
410: A/C button, 420: internal/external button,
430: blower button

Claims (10)

In the non-heater core air conditioner for controlling the temperature of a vehicle,
A determination unit that determines whether the vehicle is in the air conditioning mode,
When the air conditioner mode is executed, the air conditioning value of the vehicle is calculated, the temperature of the evaporator is set according to the air conditioning value, the outdoor air value is set according to the outdoor air temperature measured through a temperature sensor attached to the outside of the vehicle, and the A setting unit that sets a circulation value according to the air circulation mode of the vehicle, and sets a blower value according to the current stage of the blower motor of the vehicle, and
and a controller configured to set an operating temperature of the compressor of the corresponding vehicle using the temperature of the evaporator, the outdoor air value, the circulation value, and the blower value according to the number of stages of the blower motor. According to claim 1,
The air conditioning value is
Temperature control device calculated by the following equation:
Air conditioning value = A*set temperature + B*outdoor temperature + C*indoor temperature
Here, A, B, and C are weights of the set temperature, the outdoor temperature, and the indoor temperature, respectively. 3. The method of claim 2,
The air conditioning value is divided into a plurality of sections,
The temperature of the evaporator is determined according to the section to which the air conditioning value belongs,
A temperature control device configured to increase the temperature of the evaporator when the air conditioning value increases. 4. The method of claim 3,
The control unit is
When the current number of stages of the blower motor is less than or equal to the reference stage, a temperature control device for calculating the operating temperature of the compressor using the following equation.
Compressor stop temperature = (evaporator temperature + outside air value + circulation value) * blower value
Compressor operating temperature = Compressor stop temperature + 1 4. The method of claim 3,
The control unit is
When the current number of stages of the blower motor is greater than the reference stage, the temperature control device for setting the operating temperature of the compressor using the following equation.
Compressor stop temperature = evaporator temperature + outside air value + circulation value
Compressor operating temperature = Compressor stop temperature + 1 A temperature control method using a non-heater core air conditioner, comprising:
determining whether the vehicle's air conditioning mode is executed;
calculating an air conditioning value of the vehicle when the air conditioner mode is executed, and setting a temperature of an evaporator according to the air conditioning value;
setting an outdoor air value according to the outdoor air temperature measured through a temperature sensor attached to the outside of the vehicle;
setting a circulation value according to the air circulation mode of the vehicle;
Setting a blower value according to the current stage of the blower motor of the vehicle, and
and setting an operating temperature of the compressor of the corresponding vehicle using the temperature of the evaporator, the outdoor air value, the circulation value, and the blower value according to the number of stages of the blower motor. 7. The method of claim 6,
The air conditioning value is
The temperature control method calculated by the following equation:
Air conditioning value = A*set temperature + B*outdoor temperature + C*indoor temperature
Here, A, B, and C are weights of the set temperature, the outdoor temperature, and the indoor temperature, respectively. 8. The method of claim 7,
The step of setting the temperature of the evaporator according to the air conditioning value is,
The air conditioning value is divided into a plurality of sections,
The temperature of the evaporator is determined according to the section to which the air conditioning value belongs,
A temperature control method for setting the temperature of the evaporator to increase when the air conditioning value increases. 9. The method of claim 8,
Setting the operating temperature of the compressor comprises:
When the current number of stages of the blower motor is less than or equal to the reference stage, the temperature control method for calculating the operating temperature of the compressor using the following equation.
Compressor stop temperature = (evaporator temperature + outside air value + circulation value) * blower value
Compressor operating temperature = Compressor stop temperature + 1 9. The method of claim 8,
Setting the operating temperature of the compressor comprises:
When the current number of stages of the blower motor is greater than the reference number of stages, a temperature control method for setting the operating temperature of the compressor using the following equation.
Compressor stop temperature = evaporator temperature + outside air value + circulation value
Compressor operating temperature = Compressor stop temperature + 1

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