JPS6042112A - Car air-conditioner - Google Patents

Abstract

PURPOSE:To improve the comfortability by averaging the outer air temperature periodically then compensating the setting temperature on the basis of said average temperature thereby coping with the long term variation of outer air temperature. CONSTITUTION:A memory 50 will digitize the temperature detected by an outer air temperature sensor 31 through an analog/digital converter 34 to accumulate reading periodically upon command from a clock 52. An arithmetic circuit 51 will call for the accumulated outer air temperature periodically to operate an average outer air temperature TA' which is fed to a setting temperature correcting circuit 53. Consequently, said circuit 53 will correct the setting temperature T0 to produce T0'. For example, the setting temperature T0' is corrected low for high average outer air temperature TA'. The long term variation of outer air temperature is considered for setting temperature correction resulting in accurate temperature control.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a vehicle air conditioner that can perform accurate temperature control that matches human senses even when the outside temperature changes.

(B) Prior Art Modern vehicles are equipped with air conditioning systems that optimally adjust the temperature inside the Fi vehicle compartment.
This figure shows the schematic configuration of the model shown in t11"q. Air is taken in from the air inlet 3 by the blower fan 2 rotated by the motor 1, and after being dehumidified and cooled by the evaporator 4, the air mix door 5 is opened. Then, a part of the air is heated by the heater core 6 and mixed with the unheated part again to obtain the desired humidity air, which is then blown into the passenger compartment from the blowout lower, 8.9.10i compressor, 11 is the air mix door operation. 12 is an air mix door FF 14 degree sensor, 13 is a slide switch linked to the Kenia mix door position, 14 and 15 is a solenoid valve that operates the Fi actuator 11, and 14 is a solenoid valve that directs negative pressure in the engine intake pipe to the actuator 11. This is a solenoid valve that opens the 15-piece actuator 11 to atmospheric pressure.

FIG. 2 is a block diagram of the humidity control circuit of the air conditioner, in which 30 is a room temperature setting device, 31 is an outside temperature sensor, 32 is a room temperature sensor, 33 is an air mix door opening sensor, 34
' from F'i room wetness setting device 30 and sensors 31, 32
An analog-to-digital converter that digitizes the 1M degree signal command, 40 is a calculation unit, and 4J is a setting that corrects according to the humidity To set by the room temperature setting device 30 and the outside temperature TA detected by the outside temperature sensor 3. Humidity correction circuit, reference air temperature calculation circuit b143 corrected setting for calculating the reference air temperature TACO from the set temperature T'o corrected by the 42-factor correction circuit 41 and the outside air temperature TA output from the outside air temperature sensor 31. An arithmetic circuit that calculates the corrected air outlet humidity ΔT from the temperature T'o and the vehicle interior temperature TR detected by the room temperature sensor 32, a reference air air temperature TACO calculated by the t4Vi reference air outlet temperature arithmetic circuit 42, and a corrected air outlet humidity arithmetic circuit 43. 45 is an opening degree calculation circuit that calculates the air mix door opening degree X from the air outlet temperature TAc, and 46 is a digital-to-analog conversion circuit. vessel,
47 is the opening degree X calculated in this way and the air mix door opening degree X detected by the air mix door opening degree sensor 33.
This is an actuator that extends the air mix door and changes its opening degree according to the output from the comparator 4811''i' comparator 47, which is specifically the actuator 11 shown in Fig. 1. .

As shown in FIG. 3, when the outside temperature TA detected by the outside air temperature sensor 31 is high, the set temperature is corrected by the crotch filling correction circuit l1lf54J of the air conditioner. The temperature T'o is set lower than the set temperature To, and when the outside air temperature TA is low, the corrected set temperature e T'o is set higher than the set temperature To. By controlling the temperature in this way, a comfortable temperature can be obtained regardless of the season.

However, when a vehicle with this kind of air conditioning controls climbs a high mountain in the summer with the air conditioner in its air conditioned state, as the outside temperature drops, the set temperature is corrected to a higher value and the interior of the vehicle gradually becomes warmer. Passengers who are accustomed to the cold outside air do not change their feelings immediately after climbing a mountain, so they may experience discomfort as the temperature gradually rises as a result of air conditioning control.

(c) Purpose and structure of the invention The present invention has been made in view of the above points, and is an air conditioner that performs air conditioning control by correcting the set temperature according to the outside temperature. The purpose is to perform accurate humidity control that matches the senses, and for this purpose, the season is determined by calculating the average outside temperature using outside temperature data that is periodically read and stored. The set temperature is jhR corrected based on the evening temperature, and the air temperature is controlled based on this corrected set temperature.

FIG. 4 is an overall configuration diagram showing the configuration of an air conditioner according to the present invention.

The outside temperature data detected by the outside temperature sensor is periodically stored in the storage means, and the calculation means calculates the average outside temperature using this outside temperature data. The correction means is configured to correct the temperature set by the room temperature setting device based on the average outside temperature, and to control the temperature of the blowing air based on the corrected set temperature.

) Example The present invention will be explained below based on one drawing.

FIG. 5 is a block diagram showing one embodiment of the temperature control circuit of the air conditioner according to the present invention, and in the figure, the same reference numeral V as in the conventional example shown in FIG. 3 indicates the same component. The arithmetic unit 40' of this embodiment is partially different from the arithmetic unit 4o of the conventional example shown in FIG. , the other configurations remain unchanged. Memo'J 50 converts the temperature detected by the outside air temperature sensor 31 into a digital converter using the analog-to-digital converter 34, and reads and stores the value at regular intervals (every few hours) according to instructions from the clock 52. I'll keep it. The arithmetic circuit 51 uses a clock 52
External temperature data 5 stored in the memory 50 according to instructions from the factory 5 - Periodically (for example, every few days to several months)
The average outside temperature T'A thus obtained is the average outside temperature over the past few days or months. The set temperature correction circuit 53 corrects the set temperature To in accordance with the average outside temperature T'A as shown in FIG. 6, and outputs it as a set temperature. That is, when the average outside temperature T'A is low, the setting a+T'o is corrected to a low value, and when the average outside temperature T'A is low, the set temperature To is corrected to a high value. Therefore, even if there is a short-term change in outside temperature, the average outside temperature ``l,'A will hardly change, but the average outside temperature will change significantly in response to changes in outside temperature during a good period. The set temperature can be corrected to match the human FW'A.

FIG. 7 is a block diagram showing another embodiment of the temperature control circuit for the air W1 device according to the present invention, and the same reference numerals as in FIG. 4 indicate the same components. Arithmetic unit 4 of this embodiment
In σ, the commands for the calculation circuits of the five arithmetic circuits that calculate the average outside temperature using the outside temperature data stored in the memory 50 are sent not from the clock 52, but from the air conditioner M.
When the air conditioner is activated, the arithmetic circuit 51' immediately calculates the average outside temperature of 1'A over the past few days to several months. Set temperature T using this outside temperature T'A. Since the method for correcting is the same as the embodiment shown in FIG. 4 described above, the explanation will be omitted.

In this embodiment, the average outside temperature is calculated each time the air conditioner is activated, so that a long clock like the embodiment shown in FIG. 5 is not required.

As explained above, the present invention provides an air conditioner that performs air conditioning control by correcting the set temperature according to the air temperature. By calculating the average outside temperature and correcting the set temperature based on this average outside temperature, the set temperature can be adjusted appropriately against long-term outside temperature fluctuations that change the comfortable humidity level for humans. In addition, the correction of the set temperature will hardly change in response to short-term changes in outside temperature that do not change the comfortable temperature for humans, so even if the outside temperature gradually drops when climbing a high mountain in the summer, the temperature inside the car will remain unchanged. The temperature does not gradually rise, and a comfortable room temperature is maintained at all times.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of the air conditioner, Figure 2 is a conventional air conditioner:
Figure 3 is a block diagram of the temperature control circuit for the i''33 device; Figure 3 is a correction characteristic diagram of the i set temperature IW depending on the outside temperature in the conventional air crystal device; and Figure 4 shows the overall configuration of the air crystal device according to the present invention. 5 is a block diagram of an embodiment of the temperature control circuit of the air conditioner according to the present invention. FIG. Figure 7 shows a heating system 6111 of an air conditioner according to the present invention.
FIG. 7 is a block diagram of another embodiment of the circuit. 1...Motor, 2...Proa fan, 3...Air '410.4...Evaporator, 5...Air mix door, 6...Heater core, 7,8.9...Blower Exit, 10...Humpletza, 11...Actuator for air mix door operation, 12.33...Air mix door opening sensor, 13...Slide switch, 14
゜15... Solenoid valve, 30... Room temperature setting device, 31... Outside temperature sensor, 32... Room temperature sensor, 3
4...Analog-digital converter, 39...Comparator, 40, 40'...Calculation section, 4], 53...Set temperature correction circuit, 42...Reference blowout temperature calculation circuit-
43.51.5r... Arithmetic circuit, 44... Adder,
45... Opening calculation circuit, 46...digital/analog transformer,
47... actuator, 50... memory, 52...
...Clock, 60...Operating switch Patent applicant Hiroshi Suzuki, Patent attorney, Nissan Automatic 11 Moisai Shiki company agent
Man

Claims (1)

[Claims] a storage means for periodically reading and storing outside temperature data;
a calculation means for calculating an average outside temperature using the outside temperature data; a correction means for correcting a set temperature based on the average outside temperature; What is claimed is: 1. A vehicle air conditioner comprising a control means for controlling.