JP2008254531A - Solar radiation sensorless air conditioner control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar radiation sensorless air conditioner control system which enables a comfortable space environment in a cabin to be obtained by correcting the amount of heat increased through sunlight falling into the cabin when eliminating a solar radiation sensor. <P>SOLUTION: In the A/CECU12 of the solar radiation sensorless air conditioner control system, a temperature difference calculation part 23 is provided which calculates the temperature difference ΔT between a temperature INC in the cabin measured with a temperature sensor 15 in the cabin when an ignition on signal is input and a target temperature Tptc' in the cabin. A correction value calculation part 24 carries out the calculation of the correction amount of the difference of a feeling temperature through solar radiation by estimating the temperature difference ΔT calculated with the temperature difference calculation part 23 as a solar radiation amount. In the A/CECU12, a PI control part 25 is provided where a proportional integral control delaying and reflecting the correction amount calculated by the correction value calculation part 24 from the temperature difference ΔT between the temperature INC in the cabin measured with the temperature sensor 15 in the cabin and the target temperature Tptc' in the cabin. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar sensorless air conditioner control apparatus mainly used for an air conditioner for a vehicle such as an automobile, and relates to a solar sensorless air conditioner control apparatus capable of correcting the amount of solar radiation at low cost.

  2. Description of the Related Art Conventionally, an air conditioner control device that can correct a sensory temperature using a solar radiation sensor as shown in FIG. 5 is known (see, for example, Patent Document 1).

  First, in terms of configuration, this air conditioner control device is an independent temperature that automatically controls the temperature of each of a plurality of regions in a vehicle interior based on detection signals from various sensors 1 and 1a provided at various locations in the vehicle. It is used for the air conditioner 10 as an air conditioner for a toned automobile.

  The air conditioner 10 includes a solar radiation sensor 1a that is provided at a fixed position in the passenger compartment to detect the amount of sunlight incident thereon, a host vehicle position detection unit 2 that detects a current position and a traveling direction of the host vehicle, and a sun at the current time. Relative to the own vehicle position based on the sun position detecting means 3 for detecting the position of the vehicle, the own vehicle position detected by the own vehicle position detecting means 2 and the sun position detected by the sun position detecting means 3. Solar relative position calculating means 6 for determining the position.

  Further, the air conditioner 10 determines the solar radiation situation for each of the plurality of areas in the vehicle interior from the solar relative position calculated by the solar relative position calculating means 6, and determines the solar radiation situation determination result in each area. Based on the solar radiation amount correcting means 7 for correcting the solar radiation amount detected by the solar radiation sensor 1a, the solar radiation amount corrected by the solar radiation amount correcting means 7, and the measurement values detected by the various sensors 1, 1a, etc. Based on the calculated amount of comfort in each region of the vehicle interior, when this comfort level is more uncomfortable than a preset reference comfort level, using the amount of solar radiation corrected by the solar radiation amount correction means 7, Main control means 8 is provided for controlling the conditioned air blown into the area.

  The main control means 8 is connected to various actuators 9 such as an air mix door, and is configured to automatically control the optimum temperature for each region in the room by sending a control signal. Has been.

  Next, the function and effect of this conventional air conditioner control device will be described.

  In the conventional air conditioner control apparatus configured as described above, the current position and traveling direction of the own vehicle are obtained by the own vehicle position detecting means 2, and the absolute position of the sun at the current time is obtained by the sun position detecting means 3. .

  The sun relative position calculation means 6 obtains the relative position of the sun to the own vehicle position based on the current position and traveling direction of the own vehicle and the absolute position of the sun, and the solar radiation amount correction means 7 calculates the relative position from the relative position. A solar radiation situation is determined for each of a plurality of areas in the passenger compartment, such as a driver's seat, a passenger seat, a right rear seat, and a left rear seat.

  And based on the solar radiation situation in each area | region judged in this way, the actual solar radiation amount detected with the said solar radiation sensor 1a is correct | amended.

  Further, the main control means 8 calculates the comfort level in each area of the vehicle interior based on the corrected amount of solar radiation and the measured values detected by the various sensors 1, and this comfort level is preset. When it is more uncomfortable than the standard comfort level, the solar radiation amount corrected by the solar radiation amount correcting means 7 is used, and a control signal is sent to various actuators 9 such as an air mix door and blown out to the area. The conditioned air is controlled.

Thereby, only when the actual solar radiation environment is uncomfortable with the indoor air-conditioning environment, the detection signals from the various sensors 1 and 1a including the solar radiation amount correction value in consideration of the solar radiation situation in each region of the vehicle interior. Therefore, the temperature of each region in the passenger compartment is automatically controlled, so that an optimal air conditioning environment can be realized for each occupant.
JP 2000-62433 (paragraphs 0032 to 0095, FIG. 1)

  However, in the conventional air conditioner control apparatus configured as described above, the amount of heat increased by sunlight entering the vehicle compartment cannot be corrected unless the expensive solar radiation sensor 1a is used.

  For this reason, there existed a problem that it was difficult to suppress the increase in the manufacturing cost of an air-conditioner control apparatus.

  Accordingly, it is an object of the present invention to provide a solar sensorless air conditioner control device that can correct the amount of heat increased by sunlight entering a vehicle interior and obtain a comfortable vehicle interior space environment even if the solar radiation sensor is omitted. It is said.

  In order to achieve the above object, an invention described in claim 1 includes an indoor temperature setting switch for setting the temperature in the vehicle interior, a vehicle interior temperature sensor for measuring the temperature in the vehicle interior, and an outside air for measuring the outside air temperature. A solar sensorless sensor having a control unit for connecting a temperature sensor and controlling the outlet temperature according to the set temperature of the vehicle interior temperature setting switch and correcting the difference in the temperature of the vehicle interior due to solar radiation In the air conditioner control apparatus, the control unit holds a target vehicle interior temperature Tptc ′ higher than a set temperature T set by the indoor temperature setting switch in accordance with an outside air temperature measured by the outside air temperature sensor. The vehicle interior set temperature holding unit is provided and measured by the vehicle interior temperature sensor when an ignition on signal is input from an ignition switch connected to the control unit. A temperature difference calculating unit for calculating a temperature difference ΔT between the internal temperature and the target vehicle interior temperature Tptc ′, estimating the temperature difference ΔT calculated by the temperature difference calculating unit as an amount of solar radiation, It is characterized by an insolation sensorless air conditioner control device provided with a correction value calculation unit for calculating a correction amount for the difference in the sensed temperature.

  According to a second aspect of the present invention, the controller includes a temperature difference ΔT between the indoor temperature measured by the vehicle interior temperature sensor and the target vehicle interior temperature Tptc ′ by the correction value calculator. The solar sensorless air conditioner control device according to claim 1, further comprising a PI control unit that performs proportional / integral control that reflects the calculated correction amount with a delay.

Here, proportional / integral control is, for example,
P (proportional) control: (A + D) x Tptc '+ B x AMB + E
I (integration) control: C × SUN..., Using a value obtained by integration instead of a sensor

  In the invention according to claim 1 configured as above, the target vehicle interior temperature Tptc ′ held in the vehicle interior set temperature holding unit is set higher than the target indoor temperature set by the indoor temperature setting switch. Has been.

  Further, for example, according to the outside air temperature in winter, measured by the outside air temperature sensor, the difference temperature calculation unit is measured by the vehicle interior temperature sensor when the ignition on signal is input from the ignition switch. A difference temperature ΔT between the indoor temperature and the target vehicle interior temperature Tptc ′ is calculated and estimated as the amount of solar radiation.

  Therefore, when the outside air temperature and the vehicle interior temperature are different, that is, when the vehicle is not traveling and the solar radiation is present and the vehicle interior temperature is rising, the traveling state is Even if it shifts to, it can correct | amend the difference in the sensory temperature by the solar radiation of vehicle interior temperature supposing that solar radiation exists.

  In this way, even if the solar radiation sensor is omitted, the amount of heat that increases due to sunlight entering the vehicle interior can be corrected, and a comfortable vehicle interior space environment can be obtained.

  Further, the correction value is based on a difference temperature ΔT between the indoor temperature measured by the vehicle interior temperature sensor and the target vehicle interior temperature Tptc ′ by the PI controller. The correction amount calculated by the calculation unit is reflected with a delay.

  For this reason, the solar radiation correction is performed gently, and a comfortable vehicle interior space environment close to the actual body temperature can be obtained.

  Next, a solar sensorless air conditioner control device according to the best mode for carrying out the present invention will be described with reference to the drawings.

  The same or equivalent parts as those in the conventional example will be described with the same reference numerals.

  1 to 4 show a solar sensorless air conditioner control apparatus according to the preferred embodiment of the present invention.

  First, the overall configuration will be described. In the solar radiation sensorless air conditioner control device of this embodiment, as shown in FIG. 1, the A / CECU 12 as the control unit of the air conditioner device 11 detects the ON / OFF state of the ignition. A possible ignition switch 13 is connected.

  The A / CECU 12 is connected to a vehicle interior temperature setting switch 14 for setting the temperature in the vehicle interior so that the occupant can arbitrarily select a desired vehicle interior temperature.

  Further, the A / CECU 12 includes a vehicle interior temperature sensor 15 for measuring the temperature in the vehicle interior, an outdoor air temperature sensor 16 for measuring the outdoor air temperature AMB, and a post-evaporation temperature sensor 17 provided immediately after an evaporator (not shown). Is connected.

  Further, the A / CECU 12 includes various types of actuators 9 that can be controlled by sending control signals, such as an outlet switching door actuator 18, an inside / outside air switching door actuator 19, an air mix door actuator 20, and a blower FAN motor 21. So that conditioned air at a desired temperature can be blown to each region in the vehicle interior, and the outlet temperature is controlled mainly in accordance with the set temperature of the vehicle interior temperature setting switch 14 It is configured.

  In addition, the A / CECU 12 is set by the vehicle interior temperature setting switch 14 according to the outside air temperature measured by the outside air temperature sensor 16 in order to correct the difference in the temperature of the vehicle interior due to solar radiation. A vehicle interior set temperature holding unit 22 that holds a target vehicle interior temperature Tptc ′ higher than the target indoor temperature T is also provided.

  For example, even if the vehicle interior temperature setting switch 14 is set to 25 ° C., it is corrected to 26 to 27 ° C. in the winter and the vehicle interior is heated at a temperature higher than the temperature displayed on the temperature display section. It is configured as follows.

  Further, the A / CECU 12 is supplied with an indoor temperature INC measured by the vehicle interior temperature sensor 15 and a target vehicle interior temperature Tptc ′ when an ignition on signal is input from the connected ignition switch 13. A temperature difference calculation unit 23 for calculating the temperature difference ΔT is provided.

  The A / CECU 12 is provided with a correction value calculation unit 24 that estimates the difference temperature ΔT calculated by the difference temperature calculation unit 23 as the amount of solar radiation, and calculates a correction amount for the difference in the sensible temperature due to the solar radiation. It has been.

  Further, the A / CECU 12 is calculated by the correction value calculation unit 24 based on a difference temperature ΔT between the indoor temperature INC measured by the vehicle interior temperature sensor 15 and the target vehicle interior temperature Tptc ′. A PI control unit 25 is provided that performs proportional / integral control that reflects the corrected amount with a delay.

  Next, the operation of the solar radiation sensorless air conditioner control device of this embodiment will be described focusing on the calculation of SUN, which is an alternative value for the solar radiation sensor.

  In the solar radiation sensorless air conditioner control apparatus of this embodiment, as shown in Step 1 in FIG. 2, when the calculation of the SUN substitute value is started in a 100 ms process, in Step 2, the temperature difference calculation unit 23 causes the vehicle interior to be A temperature difference ΔT between the room temperature INC measured by the temperature sensor 15 and the target vehicle interior temperature Tptc ′ is calculated.

  In Step 3, it is determined whether or not switching from the ignition off signal to the ignition on signal from the ignition switch 13 is performed.

  When the ignition switch 13 is switched from the ignition off signal to the ignition on signal and the ignition on signal is input to the A / CECU 12, the process proceeds to Step 4, and when the switching is not performed, the process proceeds to Step 10. When INC is lower than the PTC set temperature, solar radiation correction is not performed.

  In Step 4, when the temperature difference ΔT is larger than 0 degrees, the process proceeds to the next Step 5, and when smaller than 0 degrees, the process proceeds to Step 8. In Step 8, S = 0 is substituted for the previous integrated value S.

  In Step 5, the outside air temperature AMB is measured by the outside air temperature sensor 16, and it is determined whether or not the outside air temperature AMB is 5 degrees or more. If it is 5 degrees or more, the process proceeds to the next Step 6, and if it is less than 5 degrees, the process returns to Step 8.

  In Step 6, the temperature difference between the vehicle interior temperature INC measured by the vehicle interior temperature sensor 15 and the outside air temperature AMB is calculated, and if the calculated value is 0 degree or more, the process proceeds to the next Step 7, If it is less, the process returns to Step 8.

  In Step 7, Smax initial setting is performed according to the MODE difference.

  That is, in Step 7, as shown in FIG. 4, when Smax initial setting is started in Step 31 due to the MODE difference, in Step 32, it is determined whether or not the air conditioner device 11 is in the VENT mode.

  If it is in the VENT mode, a = 5, b = 4, c = 3, and d = 0 are set as the Smax initial setting values in Step 33, and if not in the VENT mode, the process proceeds to the next Step 34. .

  In Step 34, it is determined whether or not the B / L mode is set.

  If it is the B / L mode, the process proceeds to Step 35, where a = 7, b = 6, c = 5, and d = 0 are set, and if not the B / L mode, the process proceeds to the next Step 36.

  In Step 36, it is determined whether or not the FOOT mode is set.

  If the mode is the FOOT mode, the process proceeds to Step 37, where a = 3, b = 2, c = 0, and d = 0 are set. If the mode is not the FOOT mode, the process proceeds to the next Step 38.

  In Step 38, it is determined whether or not the D / F mode is set.

  If the mode is the D / F mode, the process proceeds to Step 37, where a = 3, b = 2, c = 0, and d = 0 are set. If the mode is not the D / F mode, the process proceeds to the next Step 40.

  In Step 40, a = 3, b = 2, c = 0, and d = 0 are set, and in Step 41, the process returns to Step 9, and the initial values of S values a = 3 to 7 are set.

  Therefore, for example, in Step 6, even if the temperature difference between the vehicle interior temperature INC measured by the vehicle interior temperature sensor 15 and the outside air temperature AMB is 5 degrees or more, the initial value a is a = 7. Never exceed.

  Next, returning to Step 10, based on the temperature difference ΔT between the indoor temperature INC measured by the vehicle interior temperature sensor 15 and the target vehicle interior temperature Tptc ′ by the correction value calculator 24, the PI controller 25 Thus, proportional / integral control is performed in which the calculated correction amount is delayed and reflected.

  In this embodiment, the integral constant Ks given in Step 10 is set to be 0.01 when the absolute value 1 of the temperature difference ΔT (° C.) is 1 or more.

In Step 11, the integration using Equation 1 is performed using the integration constant Ks.

  Here, SS is an integrated value, S is the previous integrated value, and the case of Smax = 5 (when MODE is VENT) is illustrated.

  In Step 12, Smax is set according to the MODE difference.

  That is, as shown in FIG. 3, when the Smax setting routine is started in Step 20, it is determined in Step 21 whether or not the air conditioner device 11 is in the VENT mode.

  If it is in the VENT mode, Smax = 5 is set as the Smax initial setting value in Step 22, and if not in the VENT mode, the process proceeds to the next Step23.

  In Step 23, it is determined whether or not the B / L mode is set.

  If it is the B / L mode, the process proceeds to Step 24, Smax = 7 is set, and if it is not the B / L mode, the process proceeds to the next Step 25.

  In Step 25, it is determined whether or not the FOOT mode is set.

  If it is the FOOT mode, the process proceeds to Step 26, Smax = 3 is set, and if it is not the FOOT mode, the process proceeds to the next Step 27.

  In Step 27, it is determined whether or not the D / F mode is set.

  If the mode is the D / F mode, the process proceeds to Step 28, where Smax = 3 is set. If the mode is not the D / F mode, Smax = 3 is set, and at Step 30, the process returns to Step 13 of the main routine.

  In Step 13, an integrated value upper limit is set. That is, when the integrated value exceeds the set Smax, the process proceeds to Step 15, where S = Smax and the upper limit is set as the initial set value. For example, in the VENT mode, Smax = 5 is not exceeded.

  If the integrated value does not exceed the set Smax in Step 13, the process proceeds to the next Step 14.

  In Step 14, it is determined whether or not the integrated value SS is smaller than 0, and an integrated value lower limit is set.

  That is, when the integrated value SS is smaller than 0, the process proceeds to Step 17, S = 0 is substituted, and S does not take a negative value smaller than 0.

  When the integrated value SS exceeds 0, the process proceeds to Step 16 and the integrated value SS is substituted as the integrated value S.

  For this reason, in Step 18, when the solar radiation amount substitute value SUN obtained by integration used as the solar radiation amount is calculated using this integrated value S, it has a slope with respect to the rise and fall changes, and suddenly changes. There is nothing to do.

  In Step 19, the process returns to Step 1 again, and the main routines Step 1 to Step 19 are repeated.

Thus, the calculated solar radiation amount substitute value SUN is the sum of P (proportional) control formula of PI control: (A + D) × Tptc ′ + B × AMB + E and I (integration) control formula: C × SUN. The following formula 2 gives the weights of constants A to E and reflects them to the target temperature (MX).

  Here, the solar radiation amount substitute value SUN is integrated from the difference temperature ΔT between the indoor temperature INC measured by the vehicle interior temperature sensor 15 and the target vehicle interior temperature Tptc ′ without using a solar radiation sensor. Therefore, the constant C = −1 is fixed.

  As described above, in the solar radiation sensorless air conditioner control device of this embodiment, the target vehicle interior temperature Tptc ′ held in the vehicle interior set temperature holding unit 22 of the A / CECU 12 is determined by the vehicle interior temperature setting switch 14. The temperature is set higher than the set temperature T.

  Further, for example, in response to an outdoor air temperature AMB in winter, which is measured by the outdoor air temperature sensor 16, the temperature difference calculation unit 23 receives the ignition on signal from the ignition switch 13, and the vehicle interior temperature sensor The temperature difference ΔT between the indoor temperature INC measured at 15 and the target vehicle interior temperature Tptc ′ is calculated and estimated as the amount of solar radiation.

  Therefore, when the outside air temperature and the vehicle interior temperature are different, that is, when the vehicle is not traveling and the solar radiation is present and the vehicle interior temperature is rising, the traveling state is Even if it shifts to, it can correct | amend the difference in the sensory temperature by the solar radiation of vehicle interior temperature supposing that solar radiation exists.

  In this way, even if the solar radiation sensor is omitted, the amount of heat that increases due to sunlight entering the vehicle interior can be corrected, and a comfortable vehicle interior space environment can be obtained.

  Further, the correction amount calculated by the correction value calculation unit 24 based on the temperature difference ΔT between the indoor temperature INC measured by the vehicle interior temperature sensor 15 and the target vehicle interior temperature Tptc ′ by the PI control unit 25. Is delayed and reflected as the target temperature (MX).

  For this reason, the solar radiation correction is performed gently, and a comfortable vehicle interior space environment close to the actual body temperature can be obtained.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  That is, in the embodiment, the PI control unit 25 delays the correction value calculated by the correction value calculation unit 24 based on the temperature difference ΔT and reflects it as the target temperature (MX). In particular, for example, when the ignition switch 13 is used to input an ignition on signal from the ignition switch 13, it is determined whether the vehicle is in a sunny place or not and the vehicle If it is configured to be calculated as a difference in temperature ΔT between the indoor temperature INC measured by the indoor temperature sensor 15 and the target vehicle interior temperature Tptc ′, it can be used for delay. Of course, the calculation method may have any configuration, and the numerical values and combinations of the constants are not particularly limited.

It is a block diagram explaining the structure of a control part with the solar radiation sensorless air-conditioner control apparatus of best embodiment of this invention. It is a flowchart figure which shows the calculation order which calculates the alternative value of solar radiation amount in the solar radiation sensorless air conditioner control apparatus of the best embodiment of this invention. It is a flowchart figure which shows the setting of Smax with the solar radiation sensorless air conditioner control apparatus of this invention's best embodiment. It is a flowchart figure which shows the initial setting of Smax with the solar radiation sensorless air conditioner control apparatus of the best embodiment of this invention. It is a block diagram explaining the structure of a control part in the solar radiation sensorless air conditioner control apparatus of a prior art example.

Explanation of symbols

11 Air Conditioner Device 12 A / CECU (Control Unit)
13 Ignition switch 14 Car interior temperature setting switch 15 Car interior temperature sensor 16 Outside air temperature sensor 17 Evacuation temperature sensor 22 Car interior setting temperature holding part 23 Differential temperature calculation part 24 Correction value calculation part 25 PI control part

Claims (2)

An indoor temperature setting switch for setting the temperature in the vehicle interior, a vehicle interior temperature sensor for measuring the temperature in the vehicle interior, and an outside air temperature sensor for measuring the outside air temperature are connected to the set temperature of the vehicle interior temperature setting switch. Accordingly, a solar radiation sensorless air conditioner control device having a controller that controls the temperature of the air outlet and corrects the difference in temperature of the passenger compartment due to solar radiation,
The control unit holds a vehicle interior set temperature holding unit that holds a target vehicle interior temperature Tptc ′ higher than the set temperature T set by the room temperature setting switch in accordance with the outside air temperature measured by the outside air temperature sensor. And calculating a difference temperature ΔT between the room temperature measured by the vehicle interior temperature sensor and the target vehicle interior temperature Tptc ′ when an ignition on signal is input from an ignition switch connected to the control unit. And a correction value calculation unit that estimates the difference temperature ΔT calculated by the difference temperature calculation unit as the amount of solar radiation and calculates a correction amount for the difference in the sensory temperature due to the solar radiation. A solar sensorless air conditioner control device characterized by that.   The control unit delays the correction amount calculated by the correction value calculation unit based on the temperature difference ΔT between the indoor temperature measured by the vehicle interior temperature sensor and the target vehicle interior temperature Tptc ′. 2. A solar sensorless air conditioner control device according to claim 1, further comprising a PI control unit for performing proportional / integral control to be reflected.

Images