JPH05106883A - Air cleaning system variable in air supply volume - Google Patents

Abstract

PURPOSE:To improve an efficiency of removing dust by a method wherein a downstream end of an air supplying duct is connected to either an upstream end or a downstream end of a dust collecting element of an air cleaner. CONSTITUTION:Air from an outdoor part 12 of a heat exchanger passing through an air supplying duct 29 of a full heat exchanger 13 passes through either an upstream side or a downstream side of a dust collecting filter 33 of an air cleaner 14 and then the air is supplied to an indoor area 11. Due to this arrangement, as the number of rotation of a fan 32 of the air cleaner 14 is increased in response to a concentration of dust in the indoor area 11, air in the outdoor area 12 passing through the air supplying duct 29 is also sucked in response to the number of rotation of the fan 32, and an amount of fed air of the air cleaner 14 and the full heat exchanger 13 is synchronously increased or decreased. Accordingly, clean air having a volume more than a rated value from the outdoor area 12 can be supplied without varying the number of rotation of the fan 32 and then ventilation of the indoor area 11 can be promoted. With such an arrangement, a dust removing effect can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable air supply type air cleaning system, and more particularly to increasing or decreasing the number of rotations of a fan of an air cleaner based on the dust concentration detected by an indoor dust concentration detecting sensor. The present invention relates to a variable air supply amount air cleaning system of the type.

[0002]

2. Description of the Related Art Generally, an air cleaning system of this type is described in, for example, Japanese Patent Publication No. 1-50821. In that structure, as shown in FIG. 3, a total heat exchanger 102 for heat-exchanging the air in the room 100 and the air for the outdoors 101 and an air purifier 103 for cleaning the air in the room 100 are provided. It is provided.

The total heat exchanger 102 includes an exhaust fan 107 for discharging the air in the room 100 sucked from the duct 104 through the heat exchange element 105 to the outside 101 through the duct 106, and the heat exchange element through the duct 108. It is provided with a suction fan 110 that supplies the air of the outside 101 sucked through 105 to the room 100 through a duct 109.

The air purifier 103 is provided with a suction duct 111 for sucking the air in the room 100 and a blowing duct 112 for returning the cleaned air to the room 100. Inside the air cleaner 103, a fan 113, a dust collecting element 114 for air cleaning, and an indoor dust concentration detection sensor 115 for detecting the dust concentration of the air in the room 100 are arranged. The indoor dust concentration detection sensor 115 is the control unit 1
16 is connected to the indoor dust concentration detection sensor 115.
The control unit 116 is configured to increase / decrease the rotation speed of the fan 113 based on the dust concentration detected by.

[0005]

However, in the air cleaning system having the above structure, the total heat exchanger 102 and the air cleaner 1 are used.
No. 03 and No. 03 function independently of each other, and when the dust concentration in the room 100 increases, the room 10 can be operated only by increasing the rotation speed of the fan 113 of the air cleaner 103.
0 air was clean. Therefore, when the amount of dust generated in the room 100 is large due to smoking or the like, even if the rotation speed of the fan 113 is increased, the supply air volume of the total heat exchanger 102 does not increase in synchronization with the supply air volume of the air purifier 103. Indoor 10
There was a problem that the ventilation of 0 was not sufficient and the dust removal efficiency was low.

Further, in the above-mentioned cleaning system, since the total heat exchanger 102 and the air cleaner 103 are independent of each other, in addition to the suction duct 111 and the outlet duct 112 of the air cleaner 103, the total heat exchanger is also provided. Duct 104 of 102,
Since the duct 109 is configured to open into the room 100, there is a problem that not only the appearance is impaired, but also the construction cost required for piping is increased.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a variable air supply type air cleaning system having high dust removal efficiency, easy piping and construction, and not impairing the appearance.

[0008]

In order to solve the above-mentioned problems, a variable air supply amount air purifying system of the present invention is a total heat exchanger for performing heat exchange processing between indoor air and outdoor air for ventilation. And, provided with an air purifier for cleaning the indoor air, the total heat exchanger, to connect the air supply duct through which the air from the outdoor heat-exchange treated flows, the air purifier, a fan, A dust collecting element for air cleaning, an indoor dust concentration detection sensor for detecting the dust concentration of indoor air, and a control unit for increasing / decreasing the rotation speed of the fan based on the dust concentration detected by the indoor dust concentration detection sensor. In the variable air supply amount air purification system comprising, in the air cleaner, either on the upstream side or the downstream side of the dust collecting element,
The downstream end of the air supply duct is connected.

[0009]

According to the above construction, the air from the outdoors after heat exchange through the air supply duct of the total heat exchanger is supplied to the room through the upstream or downstream side of the dust collecting element of the air purifier. Therefore, when the number of rotations of the fan of the air purifier increases or decreases according to the dust concentration in the room, the outdoor air passing through the air supply duct is also sucked in according to the number of rotations of this fan, and the air purifier and the total heat exchanger. The supply air volume of increases and decreases synchronously. Therefore, clean air from the outside can be supplied to the room above the rated level without changing the rotation speed of the fan of the total heat exchanger.
Ventilation in the room is promoted.

[0010]

Embodiments will now be described in detail with reference to the accompanying drawings showing embodiments. As shown in FIG. 1, which is a schematic plan view of an embodiment of the present invention, a total heat exchanger 13 for heat-exchanging and ventilating the air in the room 11 and the air in the outdoors 12 is provided in the ceiling space 10.
And an air purifier 14 that purifies the air in the room 11.

The total heat exchanger 13 has a heat exchange element 15 inside.
Is equipped with. The heat exchange element 15 includes an exhaust passage 16 and
The air supply passage 17 is provided, and the air passing through one passage and the air passing through the other passage are configured to be heat-exchanged by the heat exchange element 15. Air chambers 18 to 21 are formed on the upstream side and the downstream side of both flow paths 16 and 17, respectively, and an exhaust fan 22 is provided in the air chambers 19 and 21 on the downstream side of each flow path 16 and 17. Air supply fans 23 are arranged respectively. Exhaust channel 16
A duct 25 penetrating the ceiling plate 24 and opening to the interior 11 is connected to the upstream air chamber 18, and a downstream air chamber 19 penetrates the wall 26 and opens to the outside 12. The duct 27 is connected. On the other hand, a duct 28 penetrating the wall 26 and opening to the outside 12 is connected to the air chamber 20 on the upstream side of the air supply passage 17, and an air supply duct 29 is connected to the air chamber 21 on the downstream side. Are connected.

The air purifier 14 is provided with a suction duct 30 for sucking the air in the room 11 and a blowout duct 31 for returning the cleaned air into the room 11. In addition, a fan 32 for air feeding is arranged inside the air purifier 14 between the suction duct 30 and the blowing duct 31.
On the upstream side of the fan 32, the dust collecting filter 3 for air cleaning
3 and a pre-filter 34 arranged upstream of the dust collecting filter 33. An indoor dust concentration detection sensor 35 that detects the dust concentration of the air in the room 11 sucked from the suction duct 30 is arranged on the upstream side of the pre-filter 34. The indoor dust concentration detection sensor 35 is installed in the fan 32. It is electrically connected to a control unit 36 for changing and controlling the rotation speed. The control unit 36 is composed of a microcomputer and other electrical components and the like, and is configured such that, when the indoor dust concentration exceeds a preset value, the rotation speed of the fan 32 can be increased / decreased in three steps, for example.

With the above-described structure, in the embodiment shown in FIG. 1, the air supply duct 29 of the total heat exchanger 13 is connected to the air purifier 14 downstream of the dust collecting filter 33. This structure is suitable for use in an environment where the air outside 12 is relatively clean, such as in a residential area. The control unit 3
6, fans 22 and 23 of the total heat exchanger 13 are electrically connected, and the fans 22 and 23 are configured to operate synchronously when the power of the air cleaner 14 is turned on. ..

Next, the operation will be described. According to the above structure,
When the exhaust fan 22 of the total heat exchanger 13 operates, the air in the room 11 is sucked into the air chamber 18 from the duct 25, passes through the exhaust flow path 16 of the heat exchange element 15, and further flows into the air chamber 19. , And is discharged to the outside 12 via the duct 27. Further, as the air supply fan 23 of the total heat exchanger 13 operates, the air outside 12 is sucked into the air chamber 20 from the duct 28 and the air supply passage 17 of the heat exchange element 15 is drawn.
Through the air chamber 21 and then through the duct 29. Then, the air from the room 11 and the air from the outdoors 12 pass through the flow paths 16 and 17 of the heat exchange element 15, respectively, so that the heat of both air is exchanged.

On the other hand, in the air purifier 14, the air in the room 11 sucked from the suction duct 30 by the fan 32 is removed by the pre-filter 34 and the dust collecting filter 33, and is returned to the room 11 via the blow-out duct 31. And the air cleaner 1
4, the indoor dust concentration detection sensor 35 arranged inside
When a dust concentration higher than a preset value is detected, the control unit 36 increases the number of rotations of the fan 32 based on the detected value to increase the amount of blown air to improve the dust removal capability.

In the above operation, in this embodiment, since the air supply duct 29 is connected to the downstream side of the dust collecting filter 33, the air sucked from the outdoor 12 by the total heat exchanger 13 is supplied to the air. It directly flows from the duct 29 to the upstream side of the fan 32, and is supplied to the room 11 from the blowout duct 31. In this way, since the supply air volumes of the total heat exchanger 13 and the air purifier 14 increase synchronously, the clean air of the outdoor 12 is positively supplied to the room 11 through the total heat exchanger 13. Ventilation of the room 12 is promoted, and the dust removal efficiency is increased. Particularly, in this embodiment, since the air supply duct 29 of the total heat exchanger 13 is connected to the downstream side of the dust collecting filter 33, the loss of the amount of dust removed per unit time is reduced.

When the dust concentration of the air in the room 11 falls below a preset value, the control unit 36 reduces the rotation speed of the fan 32, so that the air supply amount of the air purifier 14 decreases and the total amount of air supplied to the air purifier 14 decreases. The amount of air supplied from the heat exchanger 13 is also the air purifier 14
It decreases in sync with. The embodiment shown in FIG. 2 shows a structure in which the air supply duct 29 of the total heat exchanger 13 is connected to the upstream side of the dust collecting element 33 of the air purifier 14, that is, the upstream side of the prefilter 34. The embodiment shown in FIG. 2 is suitable for use in an environment where the dust concentration in the outside 12 is lower than that in the indoor 11, such as in a factory town or along a road, but is slightly higher.

According to the above structure, the air sucked from the outdoor 12 by the total heat exchanger 13 first flows from the air supply duct 29 to the upstream side of the pre-filter 34, and then is removed by the dust collecting filter 33. The air is supplied from the outlet duct 31 to the room 11. Therefore, the air that has undergone heat exchange in the total heat exchanger 13 is supplied after being dedusted, so that the air having a high dust concentration is not discharged from the blowout duct 31 and the ventilation of the room 11 is promoted. As a result, the dust removal efficiency is increased.

In implementing the present invention, each fan 22, 23 of the total heat exchanger 13 may be configured to operate independently of the fan 32 of the air purifier 14.
Further, it is needless to say that an air purifier of the type in which the fan 32 is arranged on the upstream side of the dust collecting element 33 may be adopted, and other various design changes are allowed within the scope of the claims.

[0020]

As described above, according to the variable supply air cleaning system of the present invention, the air from the outside after heat exchange through the air supply duct of the total heat exchanger collects dust from the air cleaner. Since the air is supplied to the room through the upstream side or the downstream side of the element, if the rotation speed of the fan of the air purifier increases or decreases according to the dust concentration in the room, the outdoor air passing through the air supply duct will also rotate. Is sucked in according to, and the supply air volume of the air purifier and the total heat exchanger increases and decreases synchronously. Therefore, clean air from the outside can be supplied to the room above the rated value without changing the rotation speed of the fan of the total heat exchanger, so that the ventilation of the room is promoted and the dust removal efficiency is improved. Further, since the air supply duct through which the heat-exchanged air from the outside circulates is connected to the air cleaner, heat loss is reduced.

Furthermore, since the air supply duct is connected to the air purifier, the number of pipes opened in the room is reduced by the amount of the air supply duct. Therefore, the appearance is improved and the construction cost required for piping is reduced.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an embodiment of the present invention.

FIG. 2 is a schematic plan view showing another embodiment of the present invention.

FIG. 3 is a schematic side view showing a conventional structure.

[Explanation of symbols]

 11 Indoor 12 Outdoor 13 Total Heat Exchanger 14 Air Cleaner 29 Air Supply Duct 32 Fan 33 Dust Collection Filter 35 Indoor Dust Concentration Detection Sensor 36 Control Unit

Claims (1)

[Claims] 1. A total heat exchanger (13) for heat-exchanging air in a room (11) and outdoor (12) and an air purifier (14) for cleaning the air in a room (11). ) And the total heat exchanger (1
The air supply duct (29) through which air from the heat-treated outdoor (12) circulates is connected to 3), and the air purifier (14) has a fan (32) and dust for air cleaning. Element (33) and indoor (1
Indoor dust concentration detection sensor that detects the dust concentration of air in 1)
(35) and a control unit (36) for increasing / decreasing the rotation speed of the fan (32) based on the dust concentration detected by the indoor dust concentration detection sensor (35). In the system, in the air cleaner (14), the air supply duct is provided at either the upstream side or the downstream side of the dust collecting element (33).
A variable air supply type air cleaning system characterized in that the downstream end of (29) is connected.