JPS58130917A - Air conditioning system for attic - Google Patents

Abstract

PURPOSE:To automatize an air conditioning system as well as shorten the total operation time by providing a system in which a ventilating fan is driven or stopped by a temperature difference switch whose contact point is closed or opened by a set temperature difference for a attic's air conditioning system to be laden unit under increasing heat loads of the whole of a house during the summer season. CONSTITUTION:The closing temperature difference TON and opening temperature difference TOFF of the contact point of a temperature difference switch 2 are each set up by knobs 3 and 4. The difference between the space temperature 6 of attic and the temperature of open air is measured by thermisters 6 and 7, and when the temperature differnce reaches TON, the contact point 11 closes, current is supplied to a motor 10, and a ventilating fan is operated, and hot air in the attic is discharged to lower the temperature of the attic. When the temperature difference reaches TOFF, the contact point 11 opens, the motor 5 is stopped, the ventilating fan 1 is stopped, and said operations are repeated.

Description

[Detailed Description of the Invention] The present invention relates to an attic ventilation system that exhausts hot air from the attic space that increases the heat load of the entire building during the summer, and the control thereof can be performed automatically and without human intervention. Do it accurately. The purpose is to reduce the cooling load by 2 pages, operate intermittently, shorten the total operating time, and reduce operating costs.

Conventional ventilation of the attic space is carried out as shown in Figure 1.
Ventilation was carried out in the gallery 101 installed on the gable side, but the ventilation was based on natural drafts, and the ventilation effect was extremely poor, especially on days when there was no wind. Therefore, during the day in summer, the air in the attic space is heated by sunlight on the roof, and although it varies depending on the building structure, materials, location conditions, etc., it can easily become 20 to 30 degrees Celsius higher than the outside air temperature. there were. For this reason, even if the air conditioner was operated during the 8th period, the heat load increased, making it extremely difficult for the room temperature to drop. Even when the outside temperature dropped at night, the ventilation in the attic space was extremely poor, so the temperature in the attic space remained low and the room temperature did not drop easily. This has the drawback of increasing the heat load on the cooling device and increasing operating costs.

The present invention solves the above-mentioned conventional drawbacks, and embodiments thereof will be explained below with reference to FIGS. 2 to 5.

In Figures 2 and 3, 1 is a ventilation fan that exhausts hot air from the attic space, and 2 is a ventilation fan that discharges hot air from the attic space. The contact closes when the temperature difference between point A and point B reaches the preset temperature difference "OFF <"ON (hereinafter referred to as a temperature difference switch). 3 is the temperature difference switch 2.
4 is a TON setting knob provided on the temperature difference switch 2 to set the temperature difference TQN at which the contact of the temperature difference switch 2 is closed, and 4 is a knob for setting the temperature difference TQN at which the contact of the temperature difference switch 2 is opened. The "OFF" setting knob provided at Light.

6 is a thermistor for sensing the temperature in the attic space, and is installed in the attic space. 7 is a thermistor that detects the outside temperature, and is installed under the eaves in a place that is not exposed to direct sunlight and is not exposed to rain. The signals from each thermistor are supplementary. FIG. 4 is a wiring diagram of the present attic ventilation system, where 1o is the motor of the ventilation fan 1, and 11 is the contact point of the temperature difference switch 2.

In the above configuration, the temperature difference "ON" at which the contact 11 closes and the temperature difference "TOFF" at which the contact 11 opens are set by the "ON" setting knob 3 and the TOFF setting knob 4. (
However, the setting is such that TON is OFF.) Thermistors 6 and 7 for sensing the attic space temperature and outside air temperature are installed in the attic space and under the eaves, respectively.
When the temperature difference between the attic space temperature and the outside air temperature reaches TON, the contact 11 is closed, the motor 1o is energized, and the ventilation fan 1 starts operating. The hot air in the attic is then exhausted outdoors,
The temperature in the attic space gradually decreases, and the temperature difference with the outside temperature becomes T.
When turned off, the contact 11 opens and the power supply to the motor 1o is stopped, and the operation of the ventilation fan 1 is stopped. Then, after that,
When the attic space temperature gradually rises due to solar radiation and the temperature difference between it and the outside air temperature reaches TON, the operation of the ventilation fan 1 is resumed. As described above, the amount of solar radiation decreases, and the temperature difference between the attic space temperature and the outside air temperature increases.
Repeat until N is no longer reached. Ventilation □ Fan 1
Since the ventilation fan 1 operates intermittently, the operating time is shorter than when the ventilation fan 1 is operated continuously, and there is no extra operating cost.Furthermore, the heat load due to hot air in the attic can be reduced without requiring labor. It can be prevented from increasing. Figure 5 shows an example of the time-temperature characteristics when the attic space is ventilated using this attic ventilation system, where the solid line represents the attic space temperature, and the dashed line represents the attic space temperature. is the outside temperature. Time t1. t2. ts...
・ is the operating time of ventilation fan 1. Therefore, the total operating time is 110 t2+t3+..., which is extremely short compared to continuous operation. Moreover,
The timing of the start and end of the driving cycle can also be accurately determined without requiring human intervention. In addition, the curve represented by a broken line is the temperature in the attic space when the gear gallery 101 is installed on the gable side and the attic space is not forcibly ventilated using a ventilation fan, as shown in Figure 1, and the temperature in the attic space is abnormal. The high temperature increases the heat load on the six vanes, increasing the operating cost of the cooling system.

As described above, according to the present invention, the hot air in the attic space, which increases the heat load of the entire building in the summer, can be automatically and accurately discharged without any manual intervention, thereby reducing the cooling load. This makes it possible to reduce the operating cost of the device, and also makes it possible to reduce the operating cost of the attic ventilation fan due to intermittent operation.

[Brief explanation of the drawing]

Fig. 1 is an installation external view of a conventional attic ventilation system, Fig. 2 is an installation external view of an attic ventilation system according to an embodiment of the present invention, and Fig. 3 is an installation external view of an attic ventilation system according to an embodiment of the present invention. Connection diagram,
Figure 4 is a wiring diagram of the attic ventilation system, and Figure 5 is the time-temperature characteristic when the attic ventilation system is operated.
Figure 2 is a graph showing an example. 1... Ventilation fan, 2... Temperature difference switch,
3..."ON setting knob, '," oFF setting knob, 7ba] 6...Thermistor, 7...Thermistor, 1°... Motor, 11...Contact. Name of agent Patent attorney Toshio Nakao and 1 other person H Kaisho 58-130917 (3) Figure 2 Figure 4 Figure 15 Figure B Fake

Claims (1)

[Claims] It has two temperature sensing parts, and when the difference in the temperature of two atmospheres in which the two temperature sensing parts are placed becomes a predetermined value of W or more, the contact closes, and the difference in the ambient temperature becomes a predetermined value of "OF".
It has a switch that opens its contacts when the temperature drops below F, and a ventilation system controlled by the switch, and one of the two temperature sensing parts is arranged to sense the attic space temperature, and the other is arranged to sense the outside air temperature or outside air temperature. The attic ventilation system is arranged to sense the intake temperature and automatically operates the ventilation device based on the difference between the attic space temperature and the outside air temperature or the outside air intake temperature.