JP2595846B2 - Variable air supply type air purification system - Google Patents

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 increase or decrease the number of revolutions of a fan of an air purifier based on a dust concentration detected by an indoor dust concentration detection sensor. The present invention relates to a variable air supply type air purifying system.

[0002]

2. Description of the Related Art An air purifying system of this kind is generally described in, for example, Japanese Patent Publication No. 1-50821. In the structure, as shown in FIG. 3, a total heat exchanger 102 that performs a heat exchange process between the air in the room 100 and the air in the outdoor 101 to ventilate and an air purifier 103 that cleans the air in the room 100 are provided. Provided.

[0003] 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 a heat exchange element from the duct 108. There is provided a suction fan 110 that supplies the air of the outside 101 sucked through the 105 to the room 100 through the duct 109.

[0004] The air purifier 103 includes a suction duct 111 for sucking air in the room 100 and an outlet duct 112 for circulating purified air into the room 100. Further, inside the air purifier 103, a fan 113, a dust collecting element 114 for purifying air, and an indoor dust concentration detection sensor 115 for detecting a dust concentration of air in the room 100 are arranged. The indoor dust concentration detection sensor 115 is the control unit 1
16 and an indoor dust concentration detection sensor 115
The control unit 116 is configured to increase or decrease the rotation speed of the fan 113 based on the detected dust concentration.

[0005]

However, in the air cleaning system having the above structure, the total heat exchanger 102 and the air purifier 1 are not required.
03 function independently of each other, and when the dust concentration in the room 100 increases, only by increasing the rotation speed of the fan 113 of the air purifier 103, the room 10
0 air was clean. Therefore, when the amount of dust generated in the room 100 is large due to smoking or the like, 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 even if the rotation speed of the fan 113 is increased. Room 10
There was a problem that the ventilation of the air was not sufficient and the dust removal efficiency was low.

Further, in the above-described cleaning system, since the total heat exchanger 102 and the air purifier 103 are independent of each other, in addition to the suction duct 111 and the blow-off duct 112 of the air purifier 103, the total heat exchanger 102 duct 104,
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 increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a variable air supply type air purifying system which has a high dust removal efficiency, is easy to pipe and work, and does not impair the appearance.

[0008]

To achieve the above object, a variable air supply type air purifying system according to the present invention comprises: a total heat exchanger for performing heat exchange between indoor air and outdoor air for ventilation;
An air purifier for purifying indoor air is provided , and the air purifier includes a fan, a dust collecting element for air cleaning, and a collector.
Circulation that circulates indoor air between the dust element and the room
An air supply system comprising: a path , an indoor dust concentration detection sensor that detects a dust concentration of indoor air, and a control unit that increases or decreases the number of revolutions of the fan based on the dust concentration detected by the indoor dust concentration detection sensor. In the variable amount air purifying system, a total heat exchanger is provided in the circulation path of the air purifier .
Merging the air supply routes of
Exhaust path for communication between the room and the total heat exchanger during dust operation
Is formed .

[0009]

According to the above construction, the air from the outside after the heat exchange through the air supply duct of the total heat exchanger is supplied to the room through the upstream side or the downstream side of the dust collecting element of the air purifier. Therefore, 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 is also sucked according to the rotation speed of the fan, and the air purifier and the total heat exchanger Supply air flow increases and decreases synchronously. Therefore, without changing the rotation speed of the fan of the total heat exchanger, it is possible to supply clean air from outside to the room more than rated,
Indoor ventilation is promoted.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. As shown in FIG. 1 which is a schematic plan view of one embodiment of the present invention, a total heat exchanger 13 for ventilating the inside of a room 11 and the outside 12 by heat exchange processing is provided in a ceiling space 10.
And an air purifier 14 for purifying the air in the room 11.

The total heat exchanger 13 has a heat exchange element 15 inside.
It has. The heat exchange element 15 includes an exhaust passage 16,
An air supply channel 17 is provided, and the air that has passed through one channel and the air that has passed through the other channel are configured to exchange heat with the heat exchange element 15. Air chambers 18 to 21 are formed on the upstream side and the downstream side of the two flow paths 16 and 17, respectively. The air chambers 19 and 21 on the downstream side of the flow paths 16 and 17 are provided with exhaust fans 22, The air supply fans 23 are arranged respectively. Exhaust passage 16
The air chamber 18 on the upstream side is connected to a duct 25 that penetrates the ceiling plate 24 and opens to the room 11, and the air chamber 19 on the downstream side opens through the wall 26 to the outside 12. 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. Is connected.

The air purifier 14 includes a suction duct 30 for sucking the air in the room 11 and an outlet duct 31 for circulating the purified air into the room 11. Further, a fan 32 for air supply is disposed inside the air purifier 14 between the suction duct 30 and the blow duct 31,
On the upstream side of the fan 32, a dust collection filter 3 for purifying air is provided.
3 and a pre-filter 34 disposed upstream of the dust collection filter 33. On the upstream side of the pre-filter 34, an indoor dust concentration detection sensor 35 for detecting the dust concentration of the air in the room 11 sucked from the suction duct 30 is arranged. It is electrically connected to a control unit 36 for changing and controlling the number of revolutions. The control unit 36 is configured by a microcomputer or other electric components, and is configured to be able to increase and decrease the rotation speed of the fan 32 in three stages, for example, when the indoor dust concentration exceeds a preset value.

In the above configuration, in the embodiment shown in FIG. 1, the air supply duct 29 of the total heat exchanger 13 is connected to the air cleaner 14 downstream of the dust collecting filter 33. This structure is suitable for use in an environment where the air is relatively clean outdoors 12 such as a residential area. Control unit 3
6, the fans 22 and 23 of the total heat exchanger 13 are electrically connected, and the fans 22 and 23 are configured to operate in synchronization when the power of the air purifier 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 from the duct 25 into the air chamber 18, passes through the exhaust passage 16 of the heat exchange element 15, and further passes through the air chamber 19. , And is discharged to the outside 12 through the duct 27. When the air supply fan 23 of the total heat exchanger 13 is operated, the air in the outdoor 12 is sucked from the duct 28 into the air chamber 20, and the air supply passage 17 of the heat exchange element 15 is provided.
And further flows through the duct 29 via the air chamber 21. Then, the air from the room 11 and the air from the outdoor 12 pass through the flow paths 16 and 17 of the heat exchange element 15, respectively, so that the heat of the air is exchanged.

On the other hand, the air cleaner 14 removes the air in the room 11 sucked from the suction duct 30 by the fan 32 with the pre-filter 34 and the dust collecting filter 33, and returns the air to the room 11 through the blowing duct 31. And air purifier 1
4, the indoor dust concentration detection sensor 35 disposed 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 and increases the amount of air blow, thereby improving the dust removal capability.

In the above operation, in this embodiment, an air supply path is formed downstream of the dust filter 33 .
Since the air supply duct 29 is connected to the
The air sucked from the outdoor 12 by the air supply duct 2
9 directly to the upstream side of the fan 32,
1 to the room 11. Also, form a path for exhaust
Due to the duct 25 formed, the heat exchange ventilation path also removes this dust.
Secured during operation. As a result, the supply air volume of the total heat exchanger 13 and the air purifier 14 increases synchronously,
Since the chamber 11 clean air outdoor 12 through the total heat exchanger 13 is supplied actively, ventilating the room 1 1 is accelerated, the higher the dust collecting efficiency. In particular, 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 dust removal amount 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 number of revolutions of the fan 32, so that the amount of air supplied to the air cleaner 14 decreases and the total amount of air supplied to the air cleaner 14 decreases. The amount of air supplied from the heat exchanger 13 is also
And decrease synchronously. In the embodiment shown in FIG. 2, a structure is shown in which the air supply duct 29 of the total heat exchanger 13 is connected to the air cleaner 14 on the upstream side of the dust collecting element 33, that is, on the upstream side of the pre-filter 34. The embodiment shown in FIG. 2 is suitable for use in an environment where the dust concentration of the outdoor 12 is lower than that of the indoor 11 such as along a factory town or a road, but slightly higher.

According to the above structure, the air sucked from the outside 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. , Is supplied from the blow duct 31 to the room 11. Therefore, the air that has been heat-exchanged in the total heat exchanger 13 is supplied to the room 11 after the dust has been removed, so that air with a high dust removal concentration is not discharged from the blow-out duct 31 and the ventilation of the room 11 is promoted. As a result, the dust removal efficiency also increases.

In embodying the present invention, each of the fans 22 and 23 of the total heat exchanger 13 may be configured to operate independently of the fan 32 of the air cleaner 14.
Further, an air cleaner of a type in which the fan 32 is arranged on the upstream side of the dust collecting element 33 may be adopted, and it goes without saying that 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 the heat exchange through the air supply duct of the total heat exchanger is collected by the air purifier. Since the air is supplied into the room through the upstream or 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 also changes the rotation speed of this fan. And the supply air volume of the air purifier and the total heat exchanger increases and decreases synchronously. Therefore, clean air from outside can be supplied to the room more than rated without changing the number of revolutions of the fan of the total heat exchanger, so that indoor ventilation is promoted and dust removal efficiency is improved. Also, since the air supply duct through which the heat-exchanged outdoor air flows is connected to the air purifier, heat loss is reduced.

In particular, in the present invention, the air supply of the total heat exchanger
The air flow path to the indoor air circulation path of the air purifier
During the dust removal operation of the air purifier,
The exhaust path that communicates with the heat exchanger
Dust concentration sensor increases fan speed
Circulates indoor air through an electric dust collector,
Introduce clean outdoor air into the room via the exchanger.
And the air in the room even during the dust removal operation
After passing through the heat exchanger, it can be discharged outdoors
As a result, indoor air purification from both heat exchange ventilation and dust collection
Can be promoted. Therefore, in the present invention
Is used for heat exchange when the dust removal function is
Synthesize synergistically with total heat exchangers without compromising function
There is an advantage that dust removal can be promoted. Further, since the air supply duct is connected to the air purifier, the number of pipes opening into the room is reduced by the air supply duct. Therefore, the appearance is improved and the construction cost required for the piping is reduced.

[Brief description of the 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 purifier 29 air supply duct 32 fan 33 dust collection filter 35 indoor dust concentration detection sensor 36 control unit

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-302539 (JP, A) JP-A 63-162243 (JP, U)

Claims (1)

(57) [Claims] An air purifier (14) for purifying air in a room (11) and a total heat exchanger (13) for ventilating the room (11) by exchanging heat between the air in the room (11) and the air in the outdoors (12). ) are provided on a substrate, the air cleaner (1
4) is a fan (32) and a dust collection element (33) for air cleaning
And indoor air between the dust collecting element (33) and the room (11).
A circulation path for circulation , an indoor dust concentration sensor (35) for detecting the dust concentration of air in the room (11), and the fan (32) based on the dust concentration detected by the indoor dust concentration sensor (35). In the variable air supply type air purifying system provided with a control unit (36) for increasing and decreasing the number of rotations, the circulation path of the air purifier (14) is used for supplying air to the total heat exchanger (13).
Route (29) and remove the air purifier (14).
Exhaust that communicates between the room (11) and the total heat exchanger (13) during dust operation
Variable air supply system characterized by forming a flow path (25) for the air supply.