JPH03211340A - Heat exchange and ventilation device - Google Patents

Abstract

PURPOSE:To prevent bad odor from being dispersed by a method wherein when the bad odor is generated at an odor generating part, an odor generating signal is outputted from an odor detection part to a controller and then a motor for a variable volume type fan is changed over to a super-charging operation by the use of the controller. CONSTITUTION:At least either of an air supply fan 2 and an exhaust fan 3 is made a variable volume type fan. A variable speed type motor (b) is applied at an air supply fan 2. The air supply fan 2 is made as a variable volume type. To an input side of a controller 7 is connected each of an odor generation detecting part 6, an indoor temperature detector 10a for detecting an indoor temperature and a surrounding air temperature detector 10b for detecting a surrounding air temperature. When the odor generating signal is outputted from the odor generating detection part 6, the variable speed motor (b) at the air supply fan 2 is rotated at a high speed in respect to the exhaust fan 3 under a control of the controller 7 so as to perform a super-charging operation. With such an arrangement, it is possible to prevent generated bad odor from being dispersed outside.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat exchange ventilation system used in offices and the like having odor generating parts such as kitchens and toilets.

(Prior Art) Conventionally, this type of heat exchange ventilation device has been disclosed in Japanese Patent Application Laid-Open No. 80-5
As described in Japanese Patent No. 4037 and shown in Fig. 5, the main casing (A) has indoor and outdoor air supply ports (
B) (C) and indoor and outdoor exhaust ports (D) (E) are provided, and an indoor air supply fan (F) is installed near the indoor air supply port (B); An outdoor exhaust fan CG) is provided near the outer exhaust port (E), and each of the air supply ports (B) and (C) is provided inside the center of the casing (A).
A heat exchanger capable of mutually exchanging heat between outdoor air passing through the air supply passage (H) between and indoor air passing through the exhaust passage (J) between the exhaust ports (D) and (E). (K), while a bypass passage (
A switching damper (L) is formed in this bypass passage (L).
M) is provided. By closing the bypass passage (L) with the damper (M), the supply and exhaust passages (H) (J
), the heat exchanger (K) exchanges heat with the indoor and outdoor air passing through the heat exchanger (K), so-called heat exchange ventilation is performed, and the damper (M) opens the bypass passage (L). As shown by the virtual line arrow in the figure, the heat exchanger (
K) is directly ventilated between the indoor and outdoor areas without passing through the air, so as to perform so-called normal ventilation. Additionally, the supply and exhaust fan (F) used in the above heat exchange ventilation device
In (G), the supply and exhaust air volumes are set to be the same in order to prevent atmospheric pressure fluctuations on the indoor side.

(Problems to be Solved by the Invention) However, as shown in FIG. 4, which will be explained later, in an office or the like that has an odor-generating part such as a kitchen or a toilet, the odor-generating part is equipped with a ventilation fan, etc. However, in recent years, indoor airtightness has been improved, and when using the heat exchange ventilation system in the above offices, the odor generated in the odor generating section is discharged outside. , the supply and exhaust air volumes of the exhaust fans (F) and (G) are set to be the same, and there is no pressure fluctuation on the indoor side.
There is a problem in that the odor generated in the odor generating section spreads into the office zone, causing discomfort to residents.

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a heat exchanger that can provide a sense of comfort to residents without dispersing the odor generated in the odor generating part into the office zone. The purpose is to provide ventilation equipment.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides indoor and outdoor air supply ports (11) and (12), indoor and outdoor air exhaust ports (
13) (14), an indoor air supply fan (2) and an outdoor exhaust fan (3), with at least one of the fans (2) and (3) being a variable displacement fan, The amount of air supplied from the air port (11) is transferred to the outdoor side exhaust port (1).
An odor generation detection section (6) that detects odor generation from the odor generation section and an odor generation signal from this detection section (6) enables supercharging operation in which the amount of air discharged is larger than that from the odor generation section (6). The present invention is characterized in that the motor (b) of the variable displacement fan is equipped with a controller (7) that outputs a switch to supercharging operation.

(Function) When an odor is generated in the odor generating section, an odor generation signal is output from the odor detection section (6) to the controller (7), and the controller (7) controls the motor (b) of the variable displacement fan.
is switched to supercharging operation, and the odor generated in the odor generating section is prevented from diffusing to the outside.

(Example) 2nd. The heat exchange ventilation device shown in Fig. 3 has indoor and outdoor air supply ports (11) and (12) and indoor and outdoor air exhaust ports (13 and 14) formed in the main body casing (1). Then, the indoor air supply port (1) is opened inside the casing (1).
1), an indoor air supply fan (2) consisting of a fan body (a) and a motor (b), and a fan body (a) and a fan body (a) near the outdoor exhaust port (14). An outdoor exhaust fan (3) consisting of a motor (b) is provided, and a heat exchanger (4) is disposed inside the center of the casing (1). Between the outdoor air passing through the air supply passage (15) between each of the air supply ports (11) and (12) and the indoor air passing through the exhaust passage (16) between each of the exhaust ports (13 and 14). and a bypass passage (17) is formed on the side of the heat exchanger (4) inside the casing (1) to bypass the heat exchanger (4). A switching damper (5) is provided to switch between the bypass passage (17) and the exhaust passage (1G).

Then, as shown by the solid line in FIG. 2, by switching the switching damper (5) and closing the bypass passage (17), the outdoor air passing through the air supply passage (15) is As shown by the solid arrow in the figure, the heat exchanger (
4) to supply air from the air supply fan (2) to the indoor side, and indoor air that passes through the exhaust passage (16),
As shown by the dotted arrow in the same figure, the exhaust air passes through the heat exchanger (4) and is exhausted from the exhaust fan (3) to the outside of the room. The outdoor air taken in inside the room and the indoor air discharged outside the room are ventilated while exchanging heat with each other, and so-called heat exchange ventilation is performed. 5) to open the bypass passage (17).
By opening the ventilator, the outdoor air and indoor air are directly supplied and exhausted without exchanging heat between the outdoor air and the indoor air using the heat exchanger (4), thereby performing so-called normal ventilation. By selectively performing normal ventilation and heat exchange ventilation, energy savings and comfort can be achieved.

In the above heat exchange ventilation system, at least one side of the supply and exhaust fans (2) and (3) is a variable displacement fan, and for example, a variable speed motor (b) is mounted on the supply fan (2) side. ) is used to make the air supply fan (2) side a variable displacement type, and when performing indoor ventilation, the variable speed motor (b) on the air supply fan (2) side is rotated at high speed. Therefore, the amount of air supplied to the indoor side from the indoor side air supply port (11) is made larger than the amount of exhaust air to the outdoor side due to the rotation of the exhaust fan (3), so that supercharging operation is performed. . Further, the heat exchange ventilation device includes an odor generation detection unit (6) that detects odor generation from an odor generation unit in an office or the like, and an odor generation signal from the detection unit (6) that detects the odor generation from the air supply fan (2). ) is provided with a controller (7) that outputs a switch to supercharging operation.

Figure 1 shows an automatic operation control device when the above heat exchange ventilation device is used together with an air conditioner (8). The air conditioner (
A transmission circuit (86) that receives the transmission signal from the transmission circuit (84) and a control circuit (
87) and a transmission circuit (88).

Further, the ventilation device side includes a transmission circuit (91) connected to the transmission circuit (88) of the indoor unit (85) via a monitor line (89), the controller (7), and a relay drive circuit. (92) and a plurality of relays (83) are provided, and the output side of the relay (93) is connected to the switching damper (
5), a variable speed motor (b) of the air supply fan (2), and a damper motor (51) for switching the air supply fan (2);
) and motor (b) respectively.

The odor generation detection section (6), an indoor temperature detector (10a) for detecting indoor temperature, and an outdoor temperature detector (10a) for detecting outdoor temperature are connected to the input side of the controller (7).
10b) respectively, and the odor generation detection section (6
), when an odor generation signal is output from the controller (7), the variable speed motor (b) on the air supply fan (2) side is
) is rotated at high speed relative to the exhaust fan (3) side to perform supercharging operation, and when no odor generation signal is output from the detection section (6), the supply and exhaust fan (2
) and (3) are rotated at the same rotational speed to perform equal air volume operation, thereby preventing atmospheric pressure fluctuations from occurring on the indoor side.

Furthermore, an output from the controller (7) based on the temperature detected by each of the temperature detectors (10a) (10b) and operating information on the air conditioner (8) side monitored by the monitor line (89). The switching damper (5) is automatically switched and controlled to selectively perform the heat exchange ventilation operation and the normal ventilation operation described above.

Figure 4 also shows the office zone (Z) and the kitchen (KT).
) and odor generating parts such as toilets (T), and the above heat exchange ventilation device (S) and the air conditioner (8) are arranged in the office zone CZ). A ventilation fan (FA) having an operation switch is provided in each of the toilets (T), etc., and the odors generated in the toilets (T), etc. are forcibly discharged to the outside by the ventilation fans (FA).

Therefore, the operation switch of the ventilation fan (FA) described above is used as the odor generation detection section (6), and this detection section (6)
is connected to the controller (7), and the toilet (T) is connected to the controller (7).
When an odor is generated and the operation switch of the ventilation m (FA) is turned on, the output from the controller (7) is used to drive the variable speed motor (b) of the air supply fan (2).
) is rotated at high speed to perform supercharging operation. In this case, the heat recovery rate during heat exchange ventilation operation will be sacrificed to some extent, but
Due to the supercharging operation, the air pressure on the office zone (Z) side becomes higher than that of the toilet (T), etc.
) etc. is prevented from spreading to the office zone (Z) side, and on the other hand, the air pressure in the toilet (T) etc. is lower than that of the office zone (Z) side, and the ventilation fi ( When the switch is not operating, the supply and exhaust fans (2) and (3) motors (b) are
The same rotation is performed to achieve equal air volume operation, making it possible to perform heat exchange ventilation without reducing heat recovery efficiency. As described above, using the operating switch of the ventilation fan (FA) installed in the toilet (T), etc., in conjunction with the on/off operation of the switch, supercharging operation is performed only when an odor occurs, and normally By performing air volume operation, it is possible to minimize the decrease in heat recovery efficiency during heat exchange ventilation operation, minimize air conditioning loss on the indoor side, and prevent the spread of odors.

In the above embodiment, the supply air fan (2) side is a variable displacement fan, but in the present invention, the exhaust fan (3)
The exhaust fan (3) using a variable speed motor (b) on the side
) side may be of a variable displacement type, and it is also possible that both the supply and exhaust fans (2) and (3) are variable displacement fans.

(Effects of the Invention) As explained above, the heat exchange ventilation device of the present invention has indoor and outdoor air supply ports (11), (12), indoor and outdoor air exhaust ports (13), and (14). It is equipped with an inside air supply fan (2) and an outdoor exhaust fan (3), and each of these fans (2)
) (3) as a variable capacity fan,
Enables supercharging operation in which the amount of air supplied from the indoor side air supply port (11) is larger than the amount of exhaust air from the outdoor side exhaust port (14), and detects odor generation in the odor generating part. It is equipped with an odor generation detection section (6) and a controller (7) that outputs a switch to supercharging operation to the motor (b) of the variable displacement fan based on the odor generation signal from the detection section (6). Therefore, when the odor is generated in the odor generating part, the odor generated in the odor generating part can be reliably prevented from diffusing to the outside, while minimizing the decrease in heat recovery efficiency in normal heat exchange ventilation. This has made it possible to provide a sense of comfort to the residents.

[Brief explanation of drawings]

Fig. 1 is an automatic control circuit diagram of the heat exchange ventilation system according to the present invention, Fig. 2 is a plan sectional view of the ventilation system, Fig. 3 is a side sectional view thereof, and Fig. 4 shows the usage state of the ventilation system. FIG. 5, which is a layout diagram of an office to be described, is a sectional view showing a conventional example. (11) -・Φ・Indoor air supply port (12)・・@9Outdoor air supply port (13)・・Indoor exhaust port (14)・φφ meeting Indoor outside exhaust port (2)・φ ... Indoor air supply fan (3) ... Fist - outdoor exhaust fan (b) ... ◆φ Motor (6) ... Odor generation detection section (7) ell ... Controller No. Figure 2 Figure 3 Figure 2 5 1 3 Figure 4 Figure 5

Claims (1)

[Claims] 1) Equipped with indoor and outdoor air supply ports (11) (12), indoor and outdoor air exhaust ports (13) (14), an indoor air supply fan (2), and an outdoor exhaust fan (3). , at least one of the fans (2) and (3) is a variable displacement fan, and the amount of air supplied from the indoor air supply port (11) is larger than the amount of air exhausted from the outdoor air exhaust port (14). The odor generation detection section (6) detects odor generation in the odor generation section, and the odor generation signal from this detection section (6) enables the variable displacement fan motor (b )
The controller (7) outputs the switching to supercharging operation.
) A heat exchange ventilation device characterized by comprising: