JPH0537146Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is designed to maintain the cleanliness of the room air while maintaining the temperature of the room, since the air in the room becomes contaminated when air conditioning equipment is used in a closed room. This invention relates to an automatic ventilation system.

[Conventional technology]

Automatic ventilation systems have been known that use gas sensors to detect when there is a gas leak or the air in a room becomes contaminated, and then drive a ventilation fan to ventilate the room (see, for example, Japanese Utility Model Publication No. 12304/1983). .

In this conventional example, the ventilation fan is not operated when natural conditions change slowly due to seasonal changes or day/night changes, and the ventilation fan is configured to operate only when conditions suddenly change. .

Such conventional automatic ventilation systems only start and operate continuously when the output value of the gas sensor exceeds a predetermined value, and stop ventilation operation only when the output value of the gas sensor falls below the predetermined value. It was hot. Therefore, it is not directly related to the use of heating equipment, and when using heating equipment, please follow the instruction manual and manually operate the ventilation fan at regular intervals or open the window to ventilate the room. Prevention of poisoning caused by air pollution was once possible.

[The problem that the idea attempts to solve]

However, with the above-mentioned conventional automatic ventilation system, when using a heating appliance in a closed room, ventilation is not automatically performed, so if you manually drive the ventilation fan,
Since the ventilation fan operates continuously, the amount of ventilation is too large and is wasted.

The issue is the balance between the thermal efficiency of the room due to heating equipment and the cleanliness (level of dirt) of the room, and how to efficiently prevent the generation of dirt from heating equipment and other dirt while maintaining the thermal efficiency of the room. The problem was whether to discharge it. In particular, if you forgot to turn off the ventilation fan, there would be too much ventilation and the heating would not work. In addition, when the gas concentration increases, the gas detection unit operates immediately when it reaches the ventilation fan ON setting level, but when the gas concentration decreases, the gas detection unit operates immediately when the gas concentration in the room falls below the ventilation fan ON setting level. There is also a hysteresis tendency in which the gas detection section continues to output for a certain period of time.
Therefore, in reality, the ventilation fan will not stop unless the gas concentration becomes lower than the gas concentration at the set level when the ventilation fan is turned on. This tendency was especially strong when the ventilation fan ON setting level was low and the gas concentration was low, and this had the disadvantage of greatly affecting energy loss. These drawbacks were also the same in the case of air conditioning.

This invention was made to solve the above problems, and the purpose is to provide an automatic ventilation system that can automatically perform ventilation operations without energy loss when heating and cooling equipment is activated. It is something to do.

[Means to solve the problem]

The automatic ventilation system according to this invention automatically determines whether or not an air conditioner is in use based on a change in the output of the temperature detection part, and when use is detected, the output of the gas detection part changes to a predetermined value. The system is equipped with a control unit that operates the ventilation fan at regular intervals for a required period of time when the ventilation level is above the ventilation level and below the alarm level.

[Effect]

In this invention, when an air-conditioning device is used, the control unit automatically determines that the heating device has been used, based on the rate of temperature rise of the indoor air, etc. At that time, if the air is dirty to some extent, the ventilation fan Ventilate the room by running it for 10 minutes every 30 minutes.

〔Example〕

FIG. 1 is a block diagram showing the structure of an embodiment of this invention. In this figure, reference numeral 1 denotes a gas detection unit that detects gas leaks and air pollution. 2 is a temperature detection unit that measures room temperature. 3 is the control section,
A CPU or the like is used to perform various controls described below.
4 is a ventilation fan drive unit, 5 is a ventilation fan, and 6 is a power supply unit that supplies power to each of the above-mentioned parts.

First, the basic principle of operation of this invention will be explained.

The first condition is set in advance. 1st
The conditions for 1 are established when the following three conditions are met: the season is winter, the degree of air pollution has reached the ventilation level, and the air conditioner is in use, and the ventilation fan 5 is operated as shown in Figure 2 a. For example, the device is driven for 10 minutes, then paused for 20 minutes, and then driven for another 10 minutes. That is, the ventilation fan 5 is driven for 10 minutes every 30 minutes to prevent overventilation due to continuous operation.

The second condition is satisfied when a gas leak or the like occurs and the gas concentration reaches the alarm level. In this case, the ventilation fan 5 operates continuously as shown in FIG. 2b.

Note that when the first condition and the second condition are satisfied in combination, the ventilation fan 5 is driven as shown in FIG. 2c, which overlaps the conditions a and b in FIG.

Next, the operation of the embodiment shown in FIG. 1 will be explained with reference to the flowchart shown in FIG. Note that FIG. 3 shows the case of heating, and (1) to (15) indicate each step.

The initial settings put the entire device into operation (1). The temperature detection unit 2 detects the room temperature and stores it in a 30-minute storage memory (not shown) (2). The control unit 3 determines whether the detected room temperature is lower than a set value (this is defined as A°C, for example 10°C) (3), and if it is below the set value A°C, the season is stored in the memory as winter. (Four). If the temperature is equal to or higher than the set value A°C, the first condition is not satisfied and the process jumps to step (5). If the season is determined to be winter in step (4), then it is determined whether the temperature is higher than the temperature 30 minutes ago by a predetermined value B°C, for example, 10°C or more (5). This checks whether the heating equipment is working or not based on the rate of temperature rise over 30 minutes. If it does not rise above the set value B℃,
The process goes to step (7), and if the temperature is high, it is stored as a high rate of rise in room temperature, that is, as the heater is in use (6). Next, it is determined whether the output of gas detection unit 1 is equal to or higher than the predetermined ventilation level.
(7), and when the ventilation level is exceeded, this is stored in memory (8).

Next, it is determined whether the output of the gas detection unit 1 is equal to or higher than a predetermined alarm level (level of gas concentration higher than the ventilation level) (9), and if it is equal to or higher, this is stored in the memory (10), The ventilation fan 5 is continuously driven until the gas concentration falls below a predetermined value.

Next, it is determined whether the first condition is met (11), and if it is true, it is stored in the memory (12), and the ventilation fan 5 is driven by the ventilation fan drive unit 4 shown in FIG.
Perform 10 minutes of ventilation every 30 minutes. On the other hand, the maximum room temperature is recorded in the memory (13), and the difference between the maximum temperature and the current temperature is the set value C°, for example, 8 It is determined whether the temperature has exceeded the set value C.degree. C. (14), and if the temperature has exceeded the set value C.degree. C., the first condition is reset (15).

In this way, when the first condition is met,
Ventilation is performed by driving the ventilation fan 5 for the required time at regular intervals to ensure efficient ventilation, and when the second condition is met, ventilation is performed unconditionally until the gas concentration falls to the specified value. Provide continuous ventilation.

It should be noted that the above-mentioned constant time does not necessarily need to be fixed at the predetermined time, and it may be arranged such that ventilation is performed for 10 minutes every 30 minutes, then 5 minutes every 20 minutes. Furthermore, this invention can be applied not only to automatic ventilation during heating but also to automatic ventilation during cooling.

[Effect of idea]

As explained in detail above, this invention automatically determines whether or not an air-conditioning appliance is being used, and when the output of the gas detection section is above a predetermined ventilation level and below an alarm level when the use is detected. We have installed a control unit that operates the ventilation fan for the required amount of time at regular intervals, so when automatically ventilating air pollution caused by air conditioning or heating, it is possible to achieve rational ventilation without excessive ventilation as in conventional methods, reducing energy loss. This has the advantage of improving heating efficiency.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of an embodiment of this invention, Figs. 2 a to c are time charts showing the state of ventilation according to this invention, and Fig. 3 explains the operation of the embodiment of Fig. 1. This is a flowchart for In the figure, 1 is a gas detection section, 2 is a temperature detection section, 3 is a control section, 4 is a ventilation fan drive section, 5 is a ventilation fan, and 6 is a power supply section.

Claims (1)

[Scope of utility model registration request] In an automatic ventilation system equipped with a gas detection section and a ventilation fan that operates when the output of the gas detection section exceeds a predetermined alarm level, the temperature detection section and the temperature detection section detect whether or not air conditioning equipment is in use. Automatically discriminates based on a change in the output of the ventilation fan, and when use is detected and the output of the gas detection unit is above a predetermined ventilation level and below the alarm level, the ventilation fan is operated for a required period of time at regular intervals. An automatic ventilation device characterized by being provided with a control section.