JPH04302935A - Control device for air conditioner - Google Patents

Abstract

PURPOSE:To operate an air conditioner while a window is opened properly and a ventilation is being carried out and to keep a room temperature at a desired room temperature. CONSTITUTION:A set value set by a temperature setting means 5 is corrected to a little higher value when a heating operation is to be carried out and the set value is corrected to a little bit lower value when a cooling operation is carried out and then an air conditioner 2 is driven. A sensing whether the air conditioning operation is for a heating or a cooling can be carried out by discriminating it as a heating operation when the set temperature is higher than that of surrounding air and by discriminating it as a cooling operation when the set temperature is lower than that of surrounding air. Since the set temperature is automatically corrected when the window is opened, it becomes possible to keep a desired room temperature while performing ventilation work.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner control device, and particularly to a control device suitable for a vehicle air conditioner.

0002

[Prior Art] When ventilation is performed while using an air conditioner, the temperature in the room decreases when heating the room and increases when cooling the room. Therefore, in order to maintain the desired room temperature by operating the air conditioner while ventilating the room by opening the windows appropriately, it is necessary to set the temperature higher for heating and lower for cooling. Particularly in the case of car air conditioners, it is often necessary to adjust the set temperature because the air changes quickly when the windows are opened, but it is cumbersome to do this manually, and it is difficult to adjust the set temperature by how much. It was difficult to maintain the desired room temperature.

0003

[Problems to be Solved by the Invention] This invention focuses on such problems, and aims to automatically correct the set temperature of the air conditioner so that the desired room temperature can be maintained even when the window is opened. It has been done.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention includes mode detection means for detecting whether the mode is heating mode or cooling mode, temperature setting means for setting the indoor temperature, and window opening. and a window opening amount detection means for detecting the opening amount, and when it is detected that the window has been opened by a predetermined amount or more, when the mode detection means detects the heating mode, the set value by the temperature setting means is corrected to a higher value. In addition, the apparatus includes a correction means for correcting the set value by the temperature setting means to a lower value when the cooling mode is detected. Further, the mode detection means described above can be configured to determine the heating mode when the set temperature is higher than the temperature of the outside air, and determine the cooling mode when the set temperature is lower than the outside air temperature.

[0005]

[Operation] When the window is opened by a predetermined amount or more, the value set by the temperature setting means is automatically corrected to be higher or lower by the correction means depending on the mode at that time. Further, by comparing the set temperature and the outside temperature, the cool/warm mode can be rationally determined.

[0006]

[Embodiment] Next, an embodiment of the illustrated automobile will be described. FIG. 1 is a block diagram of the device, and FIG. 2 and the following are flowcharts of the control procedure. In FIG. 1, 1 is a control unit, and 2 is an air conditioner controlled by this control unit 1. In FIG. The control unit 1 can be composed of a microcomputer suitably equipped with, for example, a CPU that performs various calculations, a ROM that stores control programs and data, and a RAM that temporarily stores necessary data. in case of,
The microcomputer is not exclusive to air conditioners, and can be used as is with microcomputers that are conventionally installed in automobiles for purposes such as engine control.

3 is an air conditioner switch for setting the air conditioner 2 to an operating mode; 4 is a cooling/warming mode setting means for selecting cooling operation or heating operation; 5 is a temperature setting means for manually setting a desired temperature; 6 7 is a room temperature detecting means, 7 is an outside temperature detecting means, and 8 is a window opening amount detecting means for detecting that the window is opened by a predetermined amount or more. All of these states or detection results are input to the control unit 1, and are as follows. It is used for the control described in .

FIG. 2 is a flowchart of the first embodiment. First, in step S1, it is determined whether the air conditioner switch 3 is on or off, and if it is in the driving mode, the process proceeds to the next step S2 and subsequent steps. In step S2, the degree of opening of the window is determined by the window opening amount detection means 8. If the window is opened by a predetermined amount or more, the process proceeds to step S3, otherwise the process proceeds to step S4, and the cooling/warming mode setting means 4 is set. The settings will be confirmed. Step S4 and subsequent steps are normal operations, and in the case of heating mode, the room temperature and the set temperature α for heating are compared in step S5, and if the room temperature is lower than the set temperature α, the process advances to step S6 and the air conditioner 2 is activated for heating. If it is not low, the process advances to step S7 and the drive is stopped. If it is in the cooling mode, the process proceeds to step S8, where the room temperature is compared with the set temperature β for cooling, and if the room temperature is higher than the set temperature β, the process proceeds to step S9, where the cooling operation is performed, and if it is not higher, the process proceeds to step S7, where the air conditioner is activated. will be stopped.

Step S3 and subsequent steps are steps for correcting the set temperature and driving the air conditioner 2, and in the case of heating mode, the process advances to step S11. Here, the correction amount γ (however, γ>0), which has been set based on experiments and stored in advance in the storage unit in the control unit 1, is added to the set temperature α during heating to obtain the target temperature. Comparing the room temperature with the room temperature, if the room temperature is lower than the target temperature α+γ, the process proceeds to step S12 and heating operation is performed, and if the room temperature is not lower, the process proceeds to step S13 and the drive is stopped. If it is the cooling mode, the process proceeds to step S14, where the room temperature is compared with a target temperature obtained by subtracting the correction amount γ from the set temperature β for cooling, and if the room temperature is higher than the target temperature β-γ, the process proceeds to step S15, where the cooling operation is started. If the value is not high, the process proceeds to step S13 and the drive is stopped. With this kind of control, the set temperature is automatically corrected when the windows are open, so the air conditioner can be operated while providing ventilation to maintain the desired room temperature. Note that in this embodiment, the detection signal of the outside temperature detection means 7 is not used.

FIG. 3 is a second embodiment, and shows an example of a control procedure that does not require determination of cool/warm mode. In this case, the cool/warm mode setting means 4 of FIG. 1 is unnecessary, and the detection signal of the outside temperature detecting means 7 is not used. The procedure goes through steps S1 and 2 similar to the above-mentioned embodiment, and then steps S
Proceed to 21 or 22. Step S22 and subsequent steps are normal operations when the window is not open. First, the room temperature is compared with the set temperature a plus or minus the correction amount b. Here, the set temperature a is common to heating and cooling, and the correction amount b corresponds to the width of the deviation from the set temperature a when restarting the air conditioner 2 that has stopped and is on standby, that is, the width of the dead zone. It is something.

Therefore, if the room temperature matches a±b, the process advances to step S23 and the running air conditioner 2 is stopped, and if it is stopped, the stopped state is maintained.
If the room temperature does not match a±b, the room temperature is compared with the set temperature a in step S24, and if the room temperature is higher than the set temperature a, the process proceeds to step S25 to perform cooling operation, and if it is lower, heating is performed in step S26. .

On the other hand, in step S21, the room temperature is compared with a set temperature a plus or minus a correction amount c,
If the room temperature matches a±c, the process proceeds to step S23 and the running air conditioner 2 is stopped, and if it is stopped, the stopped state is maintained, but if they do not match, the room temperature is set in step S27. When the room temperature is compared with the temperature a, if the room temperature is higher than the set temperature a, the process proceeds to step S28 and cooling is performed, and if it is lower, heating is performed in step S29. Here, the correction amount c is a smaller value than the correction amount b, and both are b>c>0
It is set so that the relationship is as follows. Therefore, when the window is open, the width of the dead zone is smaller than when it is not open, and as a result, the set value a by the temperature setting means 5 is corrected to be higher during heating and lower when cooling. be.

FIG. 4 shows a third embodiment, and shows an example of a control procedure in which the cold/warm mode is automatically determined based on the detection signal of the outside temperature detecting means 7 and does not require the cold/warm mode setting means 4. It shows. The procedure is the same step S as in other examples.
Steps 1 and 2 are followed by step S31 or step S32, where the set temperature t and the outside air temperature are compared, respectively. If the set temperature t is higher than the outside temperature, it is determined that heating is in progress, and if the set temperature t is lower than the outside temperature, it is determined that cooling is in progress. Depending on the result, the process proceeds to the next step. Note that determining the cool/warm mode by comparing the set temperature and the outside temperature in this way is extremely rational from the viewpoint of operating the air conditioner.

Step S32 and subsequent steps are normal operations when the window is not open. In the heating mode, the room temperature and the set temperature t are compared in step S33, and if the room temperature is lower than the set temperature t, the process proceeds to step S34. The air conditioner 2 is then driven for heating, and if the temperature is not low, the process advances to step S35 and the drive is stopped. If it is in the cooling mode, the process proceeds to step S36, where the room temperature and the set temperature t are compared, and if the room temperature is higher than the set temperature t, the process proceeds to step S37, where the cooling operation is performed, and if the room temperature is not higher, the process proceeds to step S35, where the driving is stopped. Ru.

Step S31 and subsequent steps are steps for correcting the set temperature and driving the air conditioner 2, and in the case of heating mode, the process advances to step S38. Here, the target temperature is set by adding the correction amount T to the set temperature t, and this is compared with the room temperature. If the room temperature is lower than the target temperature t+T, the process proceeds to step S39 and heating operation is performed; if it is not lower, the process proceeds to step S40. The drive is stopped. If it is the cooling mode, the process proceeds to step S41, where the room temperature is compared with a target temperature obtained by subtracting the correction amount T from the set temperature t, and the room temperature is the target temperature t-T.
If the temperature is higher, the process advances to step S42 and cooling operation is started; if it is not higher, the process advances to step S40 and the driving is stopped.

[0016]

Effects of the Invention As is clear from the above-described embodiments, the present invention allows the set value of the temperature setting means to be set higher or lower depending on the heating or cooling mode at that time when the window is opened by a predetermined amount or more. This is automatically corrected. Therefore, it is possible to maintain the desired room temperature when operating the air conditioner while opening the window for ventilation.
There is no need to manually readjust the set temperature, making it easier to create a comfortable living space, especially in applications where the air changes quickly when the windows are opened, such as in car air conditioners. There are big advantages. Further, in the case where the cool/warm mode is determined by comparing the set temperature and the outside temperature, a cool/warm mode setting means is not required, which simplifies the device and reduces costs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the invention.

FIG. 2 is a flowchart of a control procedure in the same embodiment.

FIG. 3 is a flowchart of another control procedure in the same embodiment.

FIG. 4 is a flowchart of still another control procedure in the same embodiment.

[Explanation of symbols]

1 Control section 2 Air conditioner 4 Cool/warm mode setting means 5 Temperature setting means 6 Room temperature detection means 7 Outside temperature detection means 8 Window opening amount detection means

Claims (2)

[Claims] 1. Mode detection means for detecting heating mode or cooling mode; temperature setting means for setting the indoor temperature; window opening amount detection means for detecting the opening amount of a window; When it is detected that the temperature has been lowered, when the mode detecting means detects the heating mode, the set value by the temperature setting means is corrected to a higher value, and when the mode detecting means detects the cooling mode, the set value by the temperature setting means is corrected to a higher value. A control device for an air conditioner, comprising: a correction means for correcting a value to a lower value. 2. The air conditioner control according to claim 1, wherein the mode detection means determines that the mode is heating mode when the set temperature is higher than the temperature of the outside air, and determines that the mode is the cooling mode when the set temperature is lower than the temperature of the outside air. Device.