JP2001323896A - Blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide simultaneous feed/discharge type blower capable of easily preventing an invasion of foreign matter and removing it at low noise. SOLUTION: An air feed passage laid from an air feed fan to an indoor fed-air exit and an air discharge passage laid from an indoor discharge suction port to an air discharge fan are bent respectively to stereoscopically cross each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general-purpose blower used for ventilation, cooling, drying, etc., and more particularly to a blower provided with an air supply fan and an exhaust fan and capable of simultaneously supplying and exhausting air in a room or the like. Related to the configuration.

[0002]

2. Description of the Related Art FIG. 2 shows a configuration example of a conventional blower.
It is sectional drawing. An air supply fan 1a, an air inlet 7a, and an air outlet 6a on the air supply side, and an exhaust fan 1b, an exhaust air inlet 6b, and an air outlet 7b on the exhaust side are arranged substantially in a straight line, respectively. An air supply passage formed by the air supply inlet 7a, the air supply fan 1a, and the air supply outlet 6a, and an exhaust gas formed by the exhaust air inlet 6b, the exhaust fan 1b, and the exhaust outlet 7b. Each of the flow paths is also formed in a substantially straight line and is substantially parallel to each other. In addition, a sound absorbing material 4 is provided in each of the flow paths to reduce noise generated from the fan.

[0003]

For example, when the above-described sound absorbing material is provided in the flow path, the noise reduction NR of the noise caused by the sound absorbing material is represented by K as a constant relating to the sound absorption coefficient of the sound absorbing material, and P as the flow path. Where S is the cross-sectional area of the flow path and L is the flow path length,

[0004]

NR = K · (P / S) · L According to Equation 1, if the length of the flow path provided with the sound absorbing material is increased, the noise reduction effect is enhanced. However, in the conventional configuration as shown in FIG. 2, an increase in the flow path length leads to an increase in the size of the blower. Also,
In the flow path configuration in which the sound absorbing material is simply provided, as apparent from Equation 1, the sound volume reduction depends on the characteristics of the sound absorbing material itself. Since the sound absorbing material usually has a high sound absorption coefficient in a high frequency band of about 1000 Hz or more, the sound absorbing material can effectively absorb high frequency noise such as wind noise and motor noise of a rotating portion of a fan such as an impeller. With respect to noise in an intermediate frequency band of about 500 to 1250 Hz, such as turbulent noise generated due to separation of an air flow in a rotating part, the sound absorption coefficient is not sufficient and the sound reduction effect is low. Therefore, effective noise reduction measures are required for not only high-frequency noise such as wind noise and motor noise, but also noise in an intermediate frequency band such as turbulent noise, and low-frequency noise. Also,
In the blower, foreign matter may be mixed into the air supply and exhaust to contaminate indoor and outdoor air or damage the blower itself. For this reason, there are many demands to make it difficult for foreign substances to be mixed and to make it possible to easily remove mixed foreign substances. For this purpose, for example, a configuration in which a filter is provided in the flow path is conceivable, but simply providing the filter also increases the pressure loss of the air flow, depending on the installation position of the filter, the shape of the flow path, and the like. The maintainability deteriorates. For this reason, an improvement measure for such inconvenience is also desired. An object of the present invention is to solve the above-mentioned problems regardless of the presence or absence of a sound absorbing material, and to provide a blower that can further improve the prior art.

[0005]

According to the present invention, there is provided a blower comprising: an air supply fan and an exhaust fan, capable of simultaneously supplying and exhausting air to a room or the like; An air supply flow path from the air supply fan to the air supply outlet and an exhaust flow path from the exhaust air inlet to the exhaust fan cross each other three-dimensionally. (2) A blower that includes an air supply fan and an air exhaust fan, and is capable of simultaneously supplying and exhausting air to a room or the like. The air supply passage from the air supply fan to the air supply outlet, and the exhaust air intake port. The exhaust passage leading to the exhaust fan intersects three-dimensionally with each other and has a sound absorbing means. (3) A blower provided with an air supply fan and an exhaust fan and capable of simultaneously supplying and exhausting air to a room or the like, wherein the air supply passage from the air supply fan to the air supply outlet and the exhaust air intake port The exhaust flow path leading to the exhaust fan has a curved configuration having flow path portions overlapping each other in a plane. (4) A blower provided with an air supply fan and an exhaust fan and capable of simultaneously supplying and exhausting air to a room or the like, wherein the air supply passage from the air supply fan to the air supply outlet and the exhaust air inlet Each of the exhaust passages leading to the exhaust fan and a portion opposing a rotating portion of each fan has a wall portion that blocks a space between the outside of the device such as the room and the air supply fan and the exhaust fan. It is assumed to have a configuration. (5) A blower including an air supply fan and an exhaust fan, which can supply and exhaust air to and from a room at the same time, for sucking air from the air supply fan to the air supply fan from outside or the like. And an exhaust suction port for sucking exhaust from the room or the like to the exhaust fan are arranged substantially in a straight line, and the exhaust fan and the exhaust from the exhaust fan are arranged in a straight line. An exhaust outlet for taking the air out of the room and the like and an air supply outlet for taking out the air from the air supply fan to the room and the like are arranged substantially in a straight line. And an exhaust passage from the exhaust suction port to the exhaust fan intersects three-dimensionally with each other. (6) A blower including an air supply fan and an exhaust fan, which can supply and exhaust air to and from a room or the like at the same time, and for sucking air from the air supply fan to the air supply fan from outside or the like. And a supply outlet for discharging the supply air from the supply fan into a room or the like is arranged on a first curve, and the exhaust fan and the exhaust fan An exhaust outlet for discharging the exhaust gas from the room and the like, and an exhaust gas inlet for sucking exhaust gas from the room and the like to the exhaust fan are provided in the second position.
And the first curve and the second curve form an air supply flow path from the air supply fan to the air supply outlet, and a flow path from the exhaust air intake port to the exhaust air fan. It is configured to cross each other at the position of the exhaust passage. (7) In the above 3) to 6), a sound absorbing means is provided in one or both of the air supply channel and the exhaust channel. (8) In the above 1) to 7), a filter is provided in one or both of the air supply channel and the exhaust channel.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 3 to 7 show the configuration of a first embodiment of the blower of the present invention. In these figures, 1
a is an air supply fan, 1b is an exhaust fan, 2a is an air supply fan drive motor, 2b is an exhaust fan drive motor, 3a is an air supply scroll, 3b is an exhaust scroll, and 4 is sound absorption. 5, an outer casing; 6 a, an air supply outlet (connection pipe for indoor air supply); 6 b, an exhaust suction port (connection pipe for indoor exhaust); 7 a, an air supply suction port (connection pipe for outdoor air supply) ), 7b are exhaust outlets (outdoor exhaust connection pipes), 8 is a flow path partition plate, 9 is a filter, 11 is a flow of supply air, 12 is a flow of exhaust air, 21 is a supply flow path (indoor side). An air supply flow path), 22 is an exhaust flow path (indoor exhaust path), 31 is an air supply fan outlet (air supply fan discharge port), 32 is an exhaust fan inlet (exhaust fan suction port). ).

FIG. 1 is a cross-sectional view of an air supply channel (room-side air supply channel) 21 of a blower as viewed from above. FIG. 3 is a cross-sectional view of the blower of FIG. FIG. 4 is a configuration diagram of an air supply side, and FIG. 4 is a configuration diagram of an exhaust side when the blower of FIG.
FIG. 3 is a cross-sectional view taken along the line CC of the blower of FIG. 1, showing a flow 11 of the supply air to the air supply outlet (indoor-side air supply connection pipe) 6 a, and FIG. FIG. 7 is a cross-sectional view taken along a line C-C of the configuration in FIG. 6, with the flow path (indoor exhaust path) 22 as a center, and the exhaust suction port (indoor exhaust connection pipe). It is sectional drawing which shows the flow 12 of the exhaust wind from 6b. The air supply flow path (indoor air supply flow path) 21 and the exhaust gas flow path (indoor exhaust gas flow path) 22 are three-dimensionally crossed and overlap each other in a plane over a certain length. Configuration. In such a configuration, air supplied from the air supply fan outlet (air supply fan discharge port) 31 is, as shown in FIG. 1, FIG. 3, FIG. 4, FIG. 6, and FIG.
The flow (flow of supply air) 11 becomes the flow path for air supply (the flow path for indoor air supply) 21 formed on the upper side of the blower.
Through the air supply outlet (indoor air supply connection pipe) 6a. On the other hand, the exhaust air is shown in FIGS.
As shown in FIGS. 4 and 5, the air is sucked from the room through the exhaust suction port (indoor exhaust connection pipe) 6 b, becomes a flow (flow of exhaust air) 12, and is formed on the lower side of the blower. The air passes through the exhaust passage (indoor exhaust passage) 22 and is sucked into the exhaust fan inlet (exhaust fan suction port) 32. A sound absorbing material 4 is provided in each of the air supply channel (indoor air supply channel) 21 and the exhaust channel (indoor exhaust channel) 22. In addition, the two flow paths are each configured in a curved shape, and as described above, cross each other in a three-dimensional manner, and furthermore, overlap each other in a plane over a certain length. The length is longer than the conventional blower as shown in FIG.

In the first embodiment, (a) the sound absorbing material 4 is provided in both the air supply passage (indoor air supply passage) 21 and the exhaust passage (indoor exhaust passage) 22. And increasing the length of both flow paths, it is possible to efficiently absorb high-frequency sounds of about 1000 Hz or more, such as wind noise of fans and electromagnetic sounds of the motors 2a and 2b. (B) A portion in which the air supply flow path (indoor air supply flow path) 21 faces the rotating part (impeller) and the motor 2a of the air supply fan 1a, and an exhaust flow path (indoor exhaust flow). Each of the passages 22 has a wall forming a flow path at a portion facing the rotating portion (impeller) of the exhaust fan 1b and the motor 2b. Between the motor and the motor. Therefore, at least each of the fans 1a, 1b
The noise generated by the rotating part and the motors 2a and 2b is blocked by the wall to the indoor side and reduced. (C) Since the supply air and the exhaust air flow in the two flow paths 21 and 22 while being bent along the flow paths, the medium and high frequency noises are reduced particularly by the noise reduction effect of the so-called bent duct. Also, when there is a dominant sound (peak noise in a specific frequency band), for example, the air supply passage (indoor supply passage) 21 and the exhaust passage (indoor exhaust passage) are used. 22 can be reduced by selecting the width dimension of the cross section perpendicular to the flow to be approximately ４ of the wavelength of the dominant sound. Further, (d) the two flow paths 2
Since each of the curved portions 1 and 22 has a curved portion, the foreign matter having a higher specific gravity than air hits the wall in the traveling direction at the curved portion and sinks downward due to a difference in momentum with the flow. for that reason,
Foreign matter can be easily removed from the flow, and in some cases, a filter unit can be dispensed with, and the flow of air supply and exhaust can be formed with little pressure loss. Further, the flow paths of the air supply flow path 21 and the exhaust flow path 22 decrease because the flow paths expand due to expansion. Therefore, in this case, it is possible to sink even a foreign substance having a small specific gravity difference from the air, and it is possible to further improve air cleanliness and reliability of removing the foreign substance.

FIG. 8 and FIG. 9 are diagrams showing the configuration of a second embodiment of the present invention. FIG. 8 is a cross-sectional top view of the blower of the present invention centering on the air supply flow path (indoor air supply flow path) 21;
FIG. 9 is a cross-sectional view as viewed from above focusing on the exhaust passage (indoor exhaust passage) 22. In the second embodiment, the filter 9 for removing foreign matter includes the air supply channel (indoor air supply channel) 21 and the exhaust channel (indoor exhaust channel).
22 are provided at or near the position where the two flow paths intersect three-dimensionally. According to the configuration of the second embodiment, in addition to the effects of the configuration of the first embodiment, a configuration with a filter that can be easily maintained in a curved flow path configuration can be realized. Further, the reliability of foreign matter removal and foreign matter intrusion prevention can be further improved. Further, in this configuration, the supply air that has exited from the rotating portion of the air supply fan 1a and has been decelerated at the bent portion of the air supply passage (indoor supply passage) 21 passes through the filter 9. Therefore, pressure loss can be suppressed low.

In the first and second embodiments, the sound absorbing material 4 is provided in both the supply-side flow path and the exhaust-side flow path over substantially the entire length of the flow path. The present invention is not limited thereto, and a configuration in which the sound absorbing material 4 is provided in one of the flow paths, a configuration in which the sound absorbing material 4 is provided only in a part of the flow path, or a configuration in which the sound absorbing material 4 is not provided in any of the flow paths may be used. The sound absorbing material may be an expansion type sound absorbing material or the like. In the second embodiment, the filter is provided in both the air supply passage and the exhaust passage. However, the filter may be provided in one of the two passages. , May not be provided in any of them.

[0011]

According to the present invention, (1) noise generated in a blower can be efficiently reduced. (2) It is possible to improve the reliability of removing foreign substances from the supply air or exhaust air and preventing foreign substances from entering the supply air or exhaust air. (3) An easy-to-maintain configuration can be realized.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of a blower according to the present invention, and is a view showing a configuration of an air supply passage side.

FIG. 2 is a diagram illustrating a configuration example of a conventional blower.

FIG. 3 is a sectional view taken along the line AA of the configuration of FIG. 1;

FIG. 4 is a sectional view taken along the line BB of the configuration in FIG. 1;

FIG. 5 is a cross-sectional view taken along the line CC of the configuration of FIG. 1;

FIG. 6 is a view showing a first embodiment of the blower of the present invention, and is a view showing a configuration of an exhaust passage side.

FIG. 7 is a sectional view taken along the line CC of the configuration of FIG. 2;

FIG. 8 is a view showing a second embodiment of the blower of the present invention, and is a view showing a configuration of an air supply passage side.

FIG. 9 is a view showing a second embodiment of the blower according to the present invention, and is a view showing a configuration on an exhaust passage side.

[Explanation of symbols]

1a: air supply fan, 1b: exhaust fan, 2a: motor for driving the air supply fan, 2b: motor for driving the exhaust fan, 3a: scroll for air supply, 3b ... scroll for exhaust, 4 ... sound absorption 5 、 Outer casing 、 6
a ... air supply outlet, 6b ... exhaust air intake, 7a ... air supply air inlet, 7b ... exhaust air outlet, 8 ... flow path partition plate, 9 ... filter, 11 ... air supply air flow, 12 ... exhaust air flow, 2
DESCRIPTION OF SYMBOLS 1 ... Air supply channel, 22 ... Exhaust channel, 31 ... Air supply fan outlet, 32 ... Exhaust fan inlet.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Hiroshi Asabuki 7-1-1 Higashi Narashino, Narashino-shi, Chiba F-term in Hitachi Keiyo Engineering Co., Ltd. (Reference) 3H032 NA02 3H034 AA02 BB02 BB06 BB20 CC03 DD05 DD08 DD28 EE00 EE04 EE06 EE17 3H035 DD03 DD05

Claims (8)

[Claims] 1. A blower comprising an air supply fan and an exhaust fan, capable of simultaneously supplying and exhausting air to a room or the like, comprising: an air supply passage from the air supply fan to an air supply outlet; A blower characterized in that an exhaust passage from an opening to the exhaust fan intersects three-dimensionally with each other. 2. An air blower comprising an air supply fan and an air exhaust fan, which can simultaneously supply and exhaust air to and from a room or the like. A blower characterized in that an exhaust passage from an opening to the exhaust fan intersects three-dimensionally with each other and is provided with sound absorbing means. 3. A blower comprising an air supply fan and an air exhaust fan, and capable of simultaneously supplying and exhausting air to a room or the like, comprising: an air supply passage from the air supply fan to an air supply outlet; A blower characterized in that an exhaust flow passage from an opening to the exhaust fan has a curved configuration having flow passage portions overlapping each other in a plane. 4. A blower comprising an air supply fan and an air exhaust fan, capable of simultaneously supplying and exhausting air to a room or the like, comprising: an air supply passage from the air supply fan to an air supply outlet; A wall for shutting off the space between the outside of the device such as the room and the air supply fan and the exhaust fan at portions where the exhaust passages from the mouth to the exhaust fan respectively face the rotating parts of the fans. A blower characterized by having a configuration having a part. 5. A blower comprising an air supply fan and an exhaust fan, which can simultaneously supply and exhaust air to and from a room or the like, wherein the air supply fan and the air supply from outside or the like to the air supply fan are provided. A supply air suction port for suctioning, and an exhaust suction port for sucking exhaust gas from the room or the like to the exhaust fan are arranged substantially in a straight line, and the exhaust fan and the exhaust fan An exhaust outlet for discharging exhaust gas to the outside of the room and an air supply outlet for discharging air from the air supply fan to the room and the like are arranged substantially in a straight line. A blower characterized in that an air supply passage leading to an air outlet and an exhaust passage leading from the exhaust inlet to the exhaust fan intersect three-dimensionally. 6. A blower comprising an air supply fan and an exhaust fan, which can supply and exhaust air to and from a room at the same time, wherein the air supply fan and the air supply from outside to the air supply fan are provided. An air supply inlet for inhaling air and an air supply outlet for discharging air from the air supply fan into a room or the like are arranged on a first curve, and the exhaust fan and the exhaust air An exhaust outlet for discharging exhaust from the fan to the outside of the room and an exhaust suction port for sucking exhaust from the room and the like to the exhaust fan are arranged on a second curve. The second curve intersects with each other at a position of an air supply passage from the air supply fan to the air supply outlet and a position of an exhaust flow passage from the exhaust air inlet to the exhaust fan. Features blower. 7. A sound absorbing means is provided in one or both of the air supply flow path and the exhaust flow path.
A blower according to any one of the above. 8. A filter is provided in one or both of the air supply flow path and the exhaust flow path.
A blower according to any one of the above.