JPH06147585A - Air conditioner - Google Patents

Abstract

PURPOSE:To contrive the improvement of the comfortability of a room by a method wherein, when discomfort index exceeds a predetermined value, an air conditioner is set to activate the function of air feed, humidifying, and weak, medium and strong cooling, according to the degree of the discomfort index and the difference between room temp. and a preset temp. CONSTITUTION:A temp. sensor 1 detects the interior temp. of a room, a humidity sensor 2 detects the interior humidity thereof and an operating means 3 is supplied with these detecting signals to compute the discomfort index. A control output computing means 5 computes the difference between a temp. preset by a setting part 4 and the interior room temp. detected by the temp. sensor 1 and, based on the resulting temp. difference and the discomfort index obtained by the operating means 3 and following the Bose formula, the operation of the air conditioner is controlled to suppress the discomfort index by at least moving the controls to the positions of air feed, humidifying and weak, medium and strong cooling. By setting the controls in this way, a comfortable atmosphere of a room can be maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner which makes a room more comfortable when controlling room temperature.

[0002]

2. Description of the Related Art Conventionally, in this type of air conditioner,
The indoor fan, the outdoor fan, and the compressor that constitutes the refrigeration cycle are controlled based on the room temperature (room temperature) and the set temperature, the air conditioner is operationally controlled so that the room temperature approaches the set temperature, and Set the environment according to the set value (set temperature).

Therefore, the user of the air conditioner can set a desired setting operation, for example, set a desired temperature, and perform the cooling operation, the heating operation and the dehumidifying operation, and the user can enjoy a comfortable environment in the room. Therefore, discomfort such as heat can be eliminated.

[0004]

By the way, in the above air conditioner, at least air blowing, dehumidifying and cooling operations are possible, and the user of the air conditioner can set the room to a desired environment. , For example, it is often the case that the operation control of the air conditioner is switched after feeling uncomfortable due to changes in room temperature and humidity, so it takes time to reach a comfortable environment, and people feel uncomfortable during that time. There was a problem.

Particularly, as in Japan, when the discomfort index (determined by temperature (temperature) and humidity) exceeds 75 due to the climate, most people feel discomfort, so the discomfort index is rapidly lowered. However, it is extremely difficult in the air conditioner.

The present invention has been made in view of the above problems, and an object thereof is to switch the air conditioner to an optimum operation according to the degree of the discomfort index and the difference between the room temperature and the set temperature to give the discomfort. Another object is to provide an air conditioner capable of maintaining a comfortable environment in the room.

[0007]

In order to achieve the above object, the present invention controls an indoor fan, an outdoor fan and a compressor constituting a refrigeration cycle based on at least the indoor temperature and a set temperature to control the indoor temperature. In an air conditioner that controls the operation of the air conditioner so as to approach the set temperature, a room temperature detection unit that detects the room temperature and a humidity detection unit that detects the room humidity, and the detected room temperature and humidity. Discomfort index (DI) calculation means for calculating the discomfort index (DI) based on the above, and when the calculated discomfort index (DI) exceeds a predetermined value, the temperature difference between the room temperature and the set temperature and the calculated discomfort. The gist of the present invention is to include a control output unit that switches the operation control of the air conditioner so as to suppress the discomfort index according to the degree of the index (DI).

[0008]

With the above structure, when the calculated discomfort index (DI) exceeds a predetermined value (for example, 70), the operation control of the air conditioner is switched, but the operation control suppresses the discomfort index. In addition, it can be switched to ventilation, dehumidification or cooling (weak, medium, strong). For example, as the difference between the detected room temperature and the set temperature is larger in the negative direction, the air conditioner is in the air blowing operation, and the difference between the room temperature and the set temperature is smaller in the positive and negative directions, or is substantially zero, and the calculation is performed. The greater the degree of discomfort index (DI), the more the air conditioner is in dehumidifying operation, and the difference between the room temperature and the set temperature is smaller in the positive direction or larger in the positive direction.
The larger the degree of I), the stronger the cooling operation of the air conditioner.

[0009]

The air conditioner of the present invention detects room temperature and indoor humidity, calculates a discomfort index based on the detected room temperature and humidity, and when the discomfort index exceeds a predetermined value, the room temperature and the set temperature are set. According to the temperature difference between and the degree of the discomfort index, the operation control of the air conditioner is switched to blow, dehumidification or weak air conditioning, medium, and strong so as to suppress the discomfort index, and indoor comfort is achieved.

Therefore, as shown in FIG. 1, the air conditioner of the present invention includes a room temperature detecting means (temperature sensor) 1 for detecting the room temperature (room temperature) and a humidity detecting means (humidity) for detecting the indoor humidity. Sensor 2 and the detected room temperature and humidity detection signals, and the discomfort index (D
I) Discomfort index (DI) calculating means 3, a setting unit 4 for setting the temperature in the room, the detected room temperature (Tr) and the set temperature (Ts) set in the setting unit 4.
The temperature difference (Tr-Ts) between the air conditioner and the temperature difference (Tr-Ts) is calculated, and based on the temperature difference and the calculated discomfort index, operation control of the air conditioner is performed at least by blowing air, dehumidifying, and weakly to suppress the discomfort index. The control output means 5 is provided to switch between cooling, medium cooling and strong cooling. In addition,
Discomfort index (DI) calculation means 3 and control output means 5
May be the microcomputer of the air conditioner. Although not shown, the air conditioner includes an indoor fan, an outdoor fan, a compressor that constitutes a refrigeration cycle, and the like.

[0011]

[Equation 1]

[0012]

[Table 1] The above formula 1 is an expression by Bose et al. In this expression, T is room temperature and U is indoor humidity. Also,
In Table 1 above, NB is large in the negative direction, NS is small in the negative direction, ZO is zero, PS is small in the positive direction, and PB is large in the positive direction.

Next, the operation of the air conditioner configured as described above will be described with reference to FIG.
More specifically, the room temperature is first detected by the room temperature detecting means 1 (step ST1), and the indoor humidity is detected by the humidity detecting means 2 (step ST2).

During operation of the air conditioner, the discomfort index (DI) calculating means calculates the discomfort index (DI) in the room based on the equation 1 (step S).
T3), in this case, by substituting the room temperature detected by the room temperature detecting means 1 into T of the above equation 1 and the humidity detected by the humidity detecting means 2 into U of the same number 1, the discomfort index (D
I) is calculated.

Subsequently, the control output means 5 determines whether or not the calculated discomfort index (DI) is 70 or more (step ST4). If the discomfort index exceeds 70, the process goes to step ST5. Then, the temperature difference (Tr-Ts) between the detected room temperature (Tr) and the set temperature (Ts) set by the setting unit 4 is calculated. Then, based on the calculated temperature difference (Tr-Ts) and the degree of the discomfort index (DI), the operation control of the air conditioner is performed according to Table 1.

As is apparent from Table 1, the larger the difference between the detected room temperature and the set temperature is in the negative direction, the more the air conditioner is in the air-blowing operation, and the difference between the detected room temperature and the set temperature is in the positive direction. As the calculated discomfort index (DI) increases, the air conditioner is dehumidified, and the difference between the detected room temperature and the set temperature is small in the positive direction.
Alternatively, the larger the degree of the calculated discomfort index (DI), the stronger the cooling operation of the air conditioner.

For example, even during the cooling operation, if the discomfort index (DI) rises due to the increase in indoor humidity, that is, the temperature difference between the room temperature (Tr) and the set temperature (Ts) is zero, or in the negative direction. Very small, discomfort index (DI) of 75
When the temperature reaches, the dehumidifying operation is performed as apparent from Table 1 and the indoor humidity is reduced, so that no discomfort is given.

Even during the dehumidifying operation, the room temperature (T
If the discomfort index (DI) increases due to the increase of r),
That is, when the temperature difference between the room temperature (Tr) and the set temperature (Ts) is small in the positive direction and the discomfort index (DI) reaches 75, the cooling operation is performed, and the room temperature (Tr) and the set temperature (T) are further set.
When the temperature difference with s) is large in the positive direction and the discomfort index (DI) is 70 or more, as is clear from Table 1, the cooling operation is performed more strongly, and not only the room temperature but also the indoor humidity decreases. Therefore, there is no discomfort.

Then, in step ST3, if it is determined that the indoor humidity has not reached 70, no discomfort is given, and therefore the air conditioner is put into normal operation, that is, normal room temperature. Control takes place.

In this way, the discomfort index (DI) is calculated based on the room temperature and the indoor humidity, and when the calculated discomfort index (DI) exceeds the predetermined value (70), the room temperature (Tr) is set. Based on the temperature difference with the temperature (Ts) and the degree of the calculated discomfort index (DI), according to Table 1, the operation of the air conditioner is controlled by the discomfort index among blowing, dehumidifying, and cooling (weak, medium, strong). Since the operation is switched to the suppressed driving, comfort in the room can be improved without giving discomfort.

In the above embodiment, the discomfort index (DI)
Is calculated by the above mathematical formula 1, but a table for calculating the discomfort index based on the already known wet-bulb temperature and dry-bulb temperature is stored in advance, and the discomfort index (DI) is referred to by referring to this table. You may get it.

[0022]

As described above, according to the air conditioner control method of the present invention, the room temperature and the room humidity are detected, and the discomfort index is calculated based on the detected room temperature and the humidity, and the discomfort is calculated. If the index exceeds a predetermined value, the operation control of the air conditioner is controlled at least to reduce air flow, dehumidification, or cooling depending on the temperature difference between the room temperature and the set temperature and the degree of the discomfort index. Since the mode is switched to medium and strong, the operation control of the air conditioner can be always performed so as to suppress the discomfort index.
The interior of the room can be maintained in a comfortable environment without causing any discomfort to people, and the comfort of the room can be further improved.

[Brief description of drawings]

FIG. 1 is a schematic partial block diagram of an air conditioner showing an embodiment of the present invention.

FIG. 2 is a flow chart for explaining the operation of the air conditioner of the present invention.

[Explanation of symbols]

 1 Room Temperature Detection Means (Room Temperature Sensor) 2 Humidity Detection Means (Humidity Sensor) 3 Discomfort Index (DI) Calculation Means 4 Setting Unit 5 Control Output Means

Claims (2)

[Claims] 1. An air conditioner that controls an indoor fan, an outdoor fan, and a compressor that constitutes a refrigeration cycle based on at least the indoor temperature and a set temperature, and that controls the operation of the air conditioner so that the indoor temperature approaches the set temperature. In a machine, a room temperature detecting means for detecting an indoor temperature and a humidity detecting means for detecting an indoor humidity, and a discomfort index (DI) calculation for calculating a discomfort index (DI) based on the detected indoor temperature and humidity And, when the calculated discomfort index (DI) exceeds a predetermined value, the discomfort index is suppressed according to the temperature difference between the room temperature and the set temperature and the degree of the calculated discomfort index (DI). An air conditioner comprising: a control output unit that switches operation control of the air conditioner. 2. The air conditioner is capable of blowing, dehumidifying, and cooling operations, and at least the larger the difference between the detected room temperature and the set temperature is in the negative direction, the air conditioner is in the blowing operation and the detected room temperature. The difference between the set temperature and the set temperature is small in the positive and negative directions, or is substantially zero, and the degree of the calculated discomfort index (DI) is larger, the air conditioner is in the dehumidifying operation, and the difference between the detected room temperature and the set temperature is The air conditioner according to claim 1, wherein the cooling operation of the air conditioner is made stronger as the calculated discomfort index (DI) becomes larger in the positive direction or in the positive direction.