JPS61256139A - Temperature and humidity control device for air-conditioning machine - Google Patents

Abstract

PURPOSE:To restrict increase of humidity in a room and improve the comfortable property of air conditioning by a constitution wherein the operation of a compressor is controlled in accordance with the change of humidity in the room, which is due to room temperature control upon room cooling operation. CONSTITUTION:A control circuit is constituted of a temperature detecting thermistor 1, a comparator 3, comparing a detected temperature with a set temperature, a humidity detecting sensor 2, the comparator 4, comparing detected humidity with a set humidity, a micro-computer 5, accommodating a circuit controlling th compressor and an outdoor fan by the outputs of the comparators 3, 4, an output circuit 6 for compressor, which controls the compressor by a control signal from the micro-computer, and the output circuit 7 for the outdoor fan. In case the load to room cooling operation is small and the compressor is stopped since a room temperature has arrived at the OFF point of the operation of compressor but the room temperature does not return to the ON point of the same during considerably long period of time, the operation of the compressor is restarted when the humidity has become higher than the set humidity in accordance with the change of humidity in the room and the increase of humidity in the room, due to the room temperature control upon room cooling operation, is restricted whereby the comfortable property of the air conditioning may be improved remarkably.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a temperature/humidity control device for an air conditioner that suppresses a rise in humidity due to room temperature control during cooling operation of the air conditioner.1.Prior art The method of controlling room temperature during cooling operation of an air conditioner is to detect the room temperature with a temperature thermistor, and when the room temperature drops, the temperature reaches the set temperature.
A common method is to stop the cooling operation when the FF point is reached, and restart the cooling operation when the room temperature rises and reaches the set temperature ON point.

However, with this method, when the load is small, even if the room temperature reaches the set temperature OFF point and cooling operation is stopped, the room temperature does not rise easily, and when the set temperature ON point is reached, cooling operation is restarted. It takes time. During this time, although the rise in room temperature is small, the rise in humidity is high, causing discomfort. Various attempts have been made to solve this problem, examples of which will be explained below.

Using the room temperature control method during cooling operation as described above, the room temperature is detected by a temperature thermistor, and the room temperature drops to the set temperature OF.
Equipped with a timer device that counts the time when the cooling operation stops when point F is reached, and restarts the cooling operation after the set time elapses, the load is small and the cooling operation reaches the constant temperature OFF point. In cases where it takes time for the room temperature to rise to the set temperature ON point even after the operation is stopped, even if the room temperature does not reach the set temperature ON point, the cooling operation will be resumed depending on the time after the set time has elapsed. It suppresses the rise in humidity.

Problems to be Solved by the Invention However, with the above configuration, since the operation of the compressor is controlled only by time, it does not correspond to actual changes in indoor humidity and does not provide much comfort. 9 It wasn't good.

In view of the above problems, the present invention aims to improve comfort by controlling the operation of a compressor in response to changes in indoor humidity due to room temperature control during cooling operation.

Means for Solving the Problems In order to solve the above problems, the temperature and humidity control device of the present invention includes temperature detection means for detecting indoor temperature and converting it into an electrical signal, and a value of the electrical signal from the temperature detection means. Set temperature O
a comparison means for comparing the values of the N point and the OFF point and outputting a control signal; a timekeeping means for measuring the time after the comparison means outputs the control signal below the OFF point; Humidity detection means for detecting indoor humidity and converting it into an electrical signal; comparison means for comparing the value of the electrical signal from the humidity detection means with a set humidity value and outputting a control signal; and turning on the compressor and the outdoor blower. a storage means storing a first output mode and a second output mode for turning off the compressor and the outdoor blower; an output means for controlling the operation of the compressor and the outdoor blower according to the output mode of the storage means; a control signal from the room temperature comparison means;
The output mode of the storage means is set to the first mode by a clock signal from the time measurement means and a control signal from the indoor humidity comparison means.
The first output mode is configured to include transition means for transitioning from the second output mode to the second output mode.

Effect The present invention has the above-described configuration, so that when the load during cooling operation is small, even when the room temperature reaches the set temperature OFF point and the compressor stops, even if the room temperature does not reach the set temperature ON point easily. In response to changes in indoor humidity, the compressor resumes operation when the humidity exceeds the set humidity, thereby suppressing the increase in indoor humidity due to room temperature control during cooling operation and greatly improving comfort. .

EXAMPLE Hereinafter, an example of the temperature and humidity control device of the present invention will be described with reference to the drawings.

FIG. 2 is a circuit diagram of a temperature and humidity control device in one embodiment of the present invention.

In the figure, the control circuit includes a temperature detection thermistor 1, a comparator 3 that compares the set temperature and the detected temperature, a humidity detection sensor 2, a comparator 4 that compares the set humidity and the detected humidity, and the comparators 3 and 4. A microcombeater 5 has a built-in circuit that controls ON/OFF of the compressor and outdoor blower by the output of the microcombeater 5, and a compressor output circuit 6 which controls the operation of the compressor by the control signal from the microcombeater 5.
, an outdoor blower output circuit 7 that controls the operation of the outdoor blower in response to a control signal from the microconbeater 5.

Next, to explain the relationship between the block diagram shown in FIG. 1 and the control port path shown in FIG. 2, the temperature detection thermistor 1 is used as a temperature detection means, the humidity detection sensor 2 is used as a humidity detection means,
Further, comparators 3 and 4 are a comparison means 2, a microcombi,
5 corresponds to a clock means, a transition means, and a storage means, and an output circuit 6 for a compressor and an output circuit 7 for an outdoor blower correspond to an output means, respectively.

Next, the operation of the control circuit having the above configuration will be explained with reference to FIGS. 2 and 4.

During cooling operation, the room temperature drops, and the detected temperature T from the temperature detection thermistor 1 is determined by the comparator 3 to the set temperature OFF point T2.
When T is lower than T2, the operation of the compressor and outdoor blower is stopped. After the shutdown, the indoor temperature and humidity begin to rise, but if the load is small, the slope of the rise in the indoor temperature is slow and it is difficult to reach the ON point T1 of the set temperature.
does not reach. After the detected temperature T becomes below the set temperature FF point T2 and the operation of the compressor and outdoor blower is stopped, the microconbeater 5 having a timer function counts a certain period of time Δt and Δ has elapsed. The humidity R in the rear chamber is detected by the humidity detection sensor 2, and compared with the set humidity R1 by the comparator 4.

When the detected humidity R is lower than the set humidity R1, the compressor and the outdoor fan remain stopped until the detected indoor temperature T reaches the set temperature ON point T1.

In addition, if the detected humidity R is higher than the set humidity R1, the compressor and outdoor fan restart operation even if the detected indoor temperature T does not reach the set temperature ON point, and the indoor temperature returns to the set temperature. Operation continues until the OFF point T2 is reached.

Next, the control mode of this embodiment will be explained with reference to the flowchart in FIG.

After the start, the ON point T1 and OFF of the set temperature, aT2, and set humidity R1 are given at input and 17, and the time n =
O is set. After operating the air conditioner, read the indoor temperature T and compare it with the set temperature OFF point T2. If T > T2, continue operating, and if T≦T2, stop the compressor and outdoor blower. .

After the stop, time n starts counting, and when a certain time n1 is counted, the room temperature T is read again and compared with the set temperature ON, aTl and OFF points T2, and if T≧T1, the compressor and The operation of the outdoor blower is restarted, and if T (T2) is reached, the compressor and the outdoor blower are stopped and the loop returns to reading the indoor temperature T.

Also, if T2≦T(T1, then read the indoor temperature H, compare it with the set humidity R1, and if R(R1), read the indoor temperature T while keeping the compressor and outdoor blower stopped. Returns to the loop for air pumping, and if R≧R1, the compressor and outdoor blower restart operation.At this time, the time n
td n =O.

By performing the above control, when the load during cooling operation is small, that is, once the set temperature OFF point is reached and the compressor and outdoor fan are stopped, the room temperature does not rise easily and reaches the set temperature ON. Even if it takes a long time to reach the desired temperature, cooling operation will resume when the humidity rises in response to changes in indoor humidity, eliminating the discomfort of high humidity and improving comfort. .

Effects of the Invention As is clear from the above embodiments, the temperature and humidity control device for an air conditioner according to the present invention lowers the room temperature during cooling operation, reaches the set temperature OFF point and stops the compressor, and then the room temperature rises. If the indoor humidity exceeds the set humidity before reaching the set temperature ON point, the compressor will restart even if the room temperature has not reached the set temperature ON point, such as when the load is small. In other words, even if the compressor stops after reaching the OFF point of the set temperature, the room temperature does not rise easily and it takes a long time to reach the ON point of the set temperature. When the humidity is detected by a humidity sensor and the humidity rises above the set humidity, cooling operation must be restarted.Conventional room temperature control suppresses the increase in indoor humidity and greatly improves comfort, while still allowing time return. It has the excellent effect of preventing wasteful operation and reducing power consumption.

[Brief explanation of the drawing]

Fig. 1 is a block diagram expressing the temperature/humidity control device of the present invention using function realizing means, Fig. 2 is a control circuit diagram of the temperature/humidity control device in an embodiment of the present invention, and Fig. 3 is a flowchart of the control device. , FIG. 4 is an explanatory diagram of the operation of the control device. 1... Temperature detection thermistor, 2... Humidity detection sensor, 3.4... Comparator, 5...
・Micro combinator.

Claims (1)

[Claims] Temperature detection means for detecting indoor temperature and converting it into an electrical signal; Comparison means for comparing the value of the electrical signal from the temperature detection means with the values of the ON point and OFF point of the set temperature and outputting a control signal; and the comparison means a time measuring means for measuring the time after the output of the control signal below the OFF point; a temperature detecting means for detecting indoor humidity after a certain period of time has elapsed by the time measuring means and converting it into an electrical signal; Comparison means for comparing the value with a set humidity value and outputting a control signal, and a memory storing a first output mode for turning on the compressor and the outdoor blower and a second output mode for turning off the compressor and the outdoor blower. output means for controlling the operation of the compressor and outdoor blower according to the output mode of the storage means; a control signal from the indoor temperature comparison means; a clock signal from the time measurement means; and an indoor humidity comparison means. A temperature/humidity control device for an air conditioner, comprising a transition means for shifting the output mode of the storage means from a first output mode to a second output mode in response to a control signal from the storage means.