JPS5851531Y2 - Air conditioner control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel configuration of an automatic control device in a dehumidifying air conditioner.

In the past, the control command element for air conditioners was mostly the dry bulb temperature, which simply controlled the temperature at a constant level, but this did not allow for the user's sense of control during the hot and humid summer months in Japan. It has been difficult to obtain a comfortable air-conditioned area that meets the above requirements.

There are also devices that calculate the discomfort index from the dry bulb temperature and the wet bulb temperature and control the air conditioner using this discomfort index, but this discomfort index is calculated from the sum of the dry bulb temperature and the wet bulb temperature, as described later. Therefore, it is a suitable control method in the hot and humid summer season mentioned above, but in the cold and humid rainy season, the discomfort index is calculated from the sum of the dry bulb temperature and the wet bulb temperature. Even though the air pressure was not very high and the conditions were humid and extremely uncomfortable, there were times when air conditioning was not provided, and the air conditioning could not be called comfortable.

The purpose of the present invention is to eliminate the above-mentioned drawbacks by selectively switching the operation control of an air conditioner between control based on discomfort index and control based on relative humidity approximation depending on the temperature of the living space. An object of the present invention is to provide a control device for an air conditioner that can create a comfortable living space that suits the senses.

To this end, the present invention includes a dry-bulb temperature detection element that detects dry-bulb temperature, a wet-bulb temperature detection element that detects wet-bulb temperature, and the dry-bulb temperature detection element that detects the reference temperature for air conditioning. a reference temperature discrimination circuit that issues a high temperature signal when the dry bulb temperature is high and a low temperature signal when the dry bulb temperature is low; a discomfort index setting unit that sets a discomfort index that is a reference for determining whether or not air conditioning operation is necessary; and the reference temperature discrimination circuit. Activated by circuit high temperature signal,
A discomfort index is calculated from the dry bulb temperature detected by the dry bulb temperature detection element and the wet bulb temperature detected by the wet bulb temperature detection element, and if the calculation result is equal to or higher than the set value of the discomfort index setting section, the air It is operated by a discomfort index control circuit 4 that operates the harmonizer and stops it if it is below the set value, and a low temperature signal from the reference temperature discrimination circuit 3, and the difference between the dry bulb temperature and the wet bulb temperature is set. The air conditioner control device includes a relative humidity control circuit 5 that operates the air conditioner 8 when the humidity is less than the set value and stops the air conditioner 8 when the humidity is equal to or higher than the set value. It is about harmony.

The present invention will be explained in detail below based on specific examples.

In general, the discomfort index is determined by two elements: temperature and humidity, and is determined by the dry bulb temperature (D, B) and the wet bulb temperature (W, B).
) is expressed by the following formula.

Discomfort index = (D, B+W, B)XO,'72+40
．． 6...(1) On the other hand, the relative humidity is also B and W,
It can be roughly determined from the relationship with B.

By the way, when looking at air conditioning operation, it is currently considered that comfortable air conditioning conditions are in the range of 25 to 27 degrees Celsius and relative temperature of 40 to 60% in the summer, and that dry conditions in and around this range are considered good. It is clear that the relationship shown in the table below exists between the bulb temperature and the wet bulb temperature.

According to the table above, D, B = 23-27℃, relative humidity = 5
It is clear that in order to become 0%, the beams are B-W, B-medium '7.0 ('C), and each of B-223-2
In order to maintain the relative humidity at 40 to 60% at 7°C, it is sufficient to control so that D, B-W, B='7±1.5 ('Ic).

This makes it possible to perform rough relative humidity approximation control within the range of air conditioning conditions based on the dry bulb temperature and wet bulb temperature.

Therefore, as a specific control device for the sudden air conditioner, the first
Examples include circuit configurations as shown in blocks in the figure.

That is, in FIG. 1, 1 is a dry bulb temperature detection element for detecting dry bulb temperature (D, B), and 2 is a wet bulb covered with fibrous material 7 for detecting wet bulb temperature (W, B). It is a temperature detection element,
3 is a reference temperature discrimination circuit which determines whether the room temperature is above or below a reference temperature for air conditioning (cooling) (e.g. 28°C) and issues a high temperature signal when the reference temperature is above, and a low temperature signal when below the reference temperature; , if it is 28°C or higher, the operation of the air conditioner 8 is controlled by the discomfort index control circuit 4 described later, and if it is lower than 28°C, the operation of the air conditioner 8 is controlled by the relative humidity control circuit 5, which will be described later. It is formed so as to perform selective switching with reference temperature as the boundary.

On the other hand, reference numeral 6 denotes a discomfort index setting unit that can arbitrarily set a discomfort index that serves as a reference for determining whether or not air conditioning operation is necessary.

The discomfort index control circuit 4 is activated when the reference temperature discrimination circuit 3 issues a high temperature signal, and the dry bulb temperature (D) detected by the dry bulb temperature detection element 1 is activated.

B) and the wet bulb temperature (W,
From B), calculate a discomfort index based on the formula (1), and if the calculation result is equal to or higher than the value (for example, 80%) set in the discomfort index setting section 6, operate the air conditioner 8,
If it is less than that, the system will stop and start/stop control will be applied to stabilize the discomfort index at the set value.

On the other hand, the relative humidity control circuit 5
is activated by issuing a low temperature signal, and based on the temperature difference between the dry bulb temperature (D, B) and the wet bulb temperature (Wo, 13), the temperature in the air conditioning range of 25 to 27 degrees Celsius in the summer is determined. This circuit performs approximate control as a substitute for relative humidity.

To explain this further, the cool room temperature is the reference temperature (28
℃) (e.g. 26℃), set the relative humidity to 50℃.
%, the relative humidity control circuit 5 calculates <D, B-W, B as described above, and if the resulting value is lower than, for example, 7.3°C, the air conditioner 8 is operated. When the relative humidity is high, it is stopped and controlled so that the relative humidity is maintained at 50%.

In addition, when such a control circuit is adopted in an air conditioner capable of dehumidification, more effective results can be obtained if the control is performed based on the discomfort index during cooling and the relative humidity during dehumidification.

Therefore, as the structure of the wet bulb temperature detection element 2, an example as shown in FIG. 2 is possible.

That is, in FIG. 2, a wet bulb temperature detection element 2 wrapped with a fibrous material 7 is disposed on the windward side of an evaporator 9 in an air conditioner 8, and a drain pan disposed below the evaporator 9. A trap 11 for collecting drain is formed in a part of the trap 10, and the lower part of the fibrous material 7 is immersed in the drain in the trap 11.

However, as the wet bulb temperature detection element 2, a thermistor or a temperature sensing part of a pressure type thermometer is used.

With this structure, the fibrous material 7 sucks up the drain accumulated in the playing card 11 by capillary action, making it possible to detect the wet bulb temperature.

Furthermore, since the drain is effectively used, there is no need to replenish water during operation, and by providing the trap 11, water can be supplied without interruption even when the machine is stopped within a certain time limit.

By providing the element 2 in a ventilation section, the wet bulb temperature can be detected more accurately, and an inlet for supplying water from the outside to the trap 11 is provided at the time of starting operation or operation after a long stop. It will be even more convenient if it is provided.

The present invention has the above-mentioned structure and function, and when the room temperature is above the set temperature, the discomfort index value is controlled, and when the room temperature is below the set temperature, the relative humidity is approximated by the difference between the dry bulb temperature and the wet bulb temperature. Since the air conditioner is controlled to start and stop so as to match the set discomfort index value or the relative humidity value approximated from the wet and dry bulb temperature difference, it is Control is mainly based on the discomfort index, and during the low and humid rainy season, relative temperature approximation control that operates in both low and humid conditions makes it possible to obtain a comfortable living environment that matches human senses.
This is a truly useful device that exhibits superior control functions compared to conventional devices that only detect dry bulb temperature or discomfort index.

[Brief explanation of drawings]

Figure 1 is an electrical block circuit diagram of an example of the device of the present invention;
The figure is a schematic diagram of an air conditioner according to an embodiment of the present invention, with the front panel omitted. 1...Dry bulb temperature detection element, 2...Wet bulb temperature detection element, 3...Reference temperature discrimination circuit, 4.
...Discomfort index control circuit, 5...Relative humidity control circuit, 6...Discomfort index setting section, 8...
...Air conditioner.

Claims (1)

[Scope of utility model registration request] A dry bulb temperature detection element 1 that detects dry bulb temperature, a wet bulb temperature detection element 2 that detects wet bulb temperature, and a dry bulb temperature detection element 1 that detects the dry bulb temperature with respect to the reference temperature for air conditioning. A reference temperature determination circuit/circuit 3 that issues a high temperature signal when the temperature is high and a low temperature signal when the temperature is low; a discomfort index setting section 6 that sets a discomfort index that is a standard for determining whether or not air conditioning operation is necessary; It is activated by the high temperature signal of the discrimination circuit 3, and calculates a discomfort index from the dry bulb temperature detected by the dry bulb temperature detection element 1 and the wet bulb temperature detected by the wet bulb temperature detection element 2, and this calculation result is The discomfort index control circuit 4 operates the air conditioner 8 if the discomfort index is equal to or higher than the set value of the discomfort index setting unit 6, and stops the air conditioner 8 if the set value is lower than the set value, and the low temperature signal of the reference temperature discrimination circuit 3 operates. It is characterized by comprising a relative humidity control circuit 5 that operates the air conditioner 8 when the difference between the dry bulb temperature and the wet bulb temperature is less than a set value, and stops the air conditioner 8 when the difference is equal to or higher than the set value. control device for air conditioners.