JP4369801B2 - Ventilation equipment - Google Patents

Description

  The present invention relates to a ventilator that ventilates a space such as a plurality of rooms and that can arbitrarily determine an intake port position with respect to a ventilation box that accommodates a ventilation fan.

Conventionally, as this type of ventilation device, for example, there is a device that is installed behind the ceiling of a bathroom and ventilates a room (space) such as a bathroom, a dressing room, and a toilet. Also, it is often used as a bathroom drying heater by connecting a heating unit equipped with a heat exchanger to one of the air inlets of the ventilator.
By the way, the air volume control in this ventilation apparatus is performed by controlling the electric current value applied to the fan motor of a ventilation fan (patent document 1). That is, there is a correlation between the magnitude of the air volume and the magnitude of the current value applied to the fan motor (corresponding to the “target air volume relational expression” in Patent Document 1) for a certain rotational speed of the ventilation fan. Therefore, when performing the air volume control of the ventilation device, instead of directly recognizing the air volume, the magnitude of the current value of the fan motor can be recognized, and the air volume can be determined based on the control reference based on the correlation.
On the other hand, the floor plan of the room to be ventilated varies depending on the house, and the side wall of the ventilation box that houses the ventilation fan is used to facilitate the construction of the duct regardless of the arrangement of the room to be ventilated. A plurality of air inlets are provided adjacent to each other to provide flexibility in the air inlet connection pattern in the ventilation box (Patent Document 2).
JP 2000-346434 A JP2003-161485

However, the air flow (air flow) in the ventilation box changes for each inlet connection pattern of the ventilation box, and depending on the specific inlet connection pattern, there is a large difference in the correlation between the "rotation speed-current value" in air volume control. Occurs. Then, when the ventilation fan is controlled based on the sole control standard, there is a large variation in the air volume for each intake port connection pattern, resulting in a problem that the air blowing performance is different for each intake port connection pattern.
On the other hand, it is conceivable to have a plurality of control standards corresponding to each inlet connection pattern in advance, but this leads to a complicated control configuration, and the inlet connection constructed when installing the ventilator There is also a risk of setting a specific control standard according to the pattern. Therefore, it is desirable for the ventilator to obtain a stable blowing performance regardless of the inlet connection pattern even with one control table without having a plurality of control standards.
The present invention has been made in view of the above circumstances, and suppresses the difference in air resistance in the ventilation box for each intake port connection pattern, so that even with one control standard, stable air blowing is possible regardless of the intake port connection pattern. It aims at realizing the ventilator which can obtain performance.

(1) A ventilation apparatus according to the present invention includes a ventilation box provided with a plurality of arbitrarily used intake ports and a single exhaust port, a ventilation fan accommodated in the ventilation box, and an air volume by the ventilation fan. A ventilation device comprising an air volume control means that variably controls the current by flowing a current through the fan motor, wherein a wind shield is provided in a ventilation path formed by a gap between a surface of the ventilation fan on the fan inlet side and the surface of the ventilation box. The air volume control means is provided so as to control the air volume of the ventilation fan based on one control standard.
In addition, the ventilation fan has a circular fan casing containing a sirocco fan, a circular fan inlet is provided on one side of the upper and lower surfaces of the circular fan casing, and a fan outlet is provided sideways on the side. The wind shield is provided in a region including the fan outlet when a bisector is drawn on the circular fan casing along the blowing direction of the fan outlet.

Further, the ventilation box has four side walls on which the intake port and the exhaust port are formed, and the exhaust port is formed on one side of the first side wall, adjacent to the first side wall and facing each other. The second side wall and the fourth side wall are configured to be provided with an intake port having a larger intake air volume than the other intake ports, and the wind shield is located closer to the exhaust port on the first side wall. It is provided between the position of the intake port on the second side wall located and the fan intake port of the ventilation fan.
Further, the wind shield is a wind shield made of a plate material provided on the fan casing of the ventilation fan, and the wind shield is set to a size that allows a gap to be formed between the ventilation box constituent surfaces. Yes.
One of the air inlets of the ventilation box may be a communication port from a heating unit provided with a heat exchanger.

(2) According to the ventilator having the above-described configuration, the wind shield can generate a rectifying action on the air flow in the ventilation path formed by the gap between the ventilation box and the ventilation fan, and the fan intake port of the ventilation fan. As a result, air is smoothly sucked. Thereby, regardless of the difference in the inlet connection pattern, the difference in the air resistance flowing through the ventilation path between the inlet connection patterns can be reduced. That is, when the ventilation fan is operated at the same number of rotations among the plurality of inlet connection patterns, both the inlet connection pattern that gives the largest air volume and the inlet connection pattern that gives the smallest air volume, The air volume gap can be reduced. Therefore, in the air volume control means, even if the air volume of the ventilation fan is controlled based on one control standard, the variation in the air volume between the connection patterns can be reduced regardless of the inlet connection pattern.

  As described above, according to the present invention, by providing the wind shield in the air passage formed by the gap between the surface on the fan inlet side of the ventilation fan and the surface constituting the ventilation box, the ventilation for each inlet connection pattern is provided. Since the difference in air resistance in the box can be suppressed, even if the air volume control means controls the air volume based on one control standard in the air volume control means, stable air blowing performance can be obtained regardless of the inlet connection pattern. There is. Moreover, since the air volume control means can cope with the air volume control of various intake port connection patterns only by having one control standard, there is an effect that the control configuration can be easily configured.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a ventilator 1 according to an embodiment is installed behind a ceiling of a bathroom BR and ventilates a room (space) such as a bathroom BR or a toilet TR. The heating unit 2 is juxtaposed and used as a bathroom heating and drying device. This ventilation device 1 is connected to a ventilation box 10 containing a ventilation fan 3 (see FIG. 2), a ventilation duct D2 leading to the ceiling of the toilet TR and an exhaust duct D1 leading to the outdoors, and a bathroom. A heating unit 2 communicating with the inside of the BR is arranged in parallel. Therefore, by operating the ventilation device 1, the air in the toilet TR and the bathroom BR is sucked into the ventilation box 10 through the ventilation duct D2 and the heating unit 2, respectively, and then the air sucked into the ventilation box 10 is exhausted. It is exhausted outdoors through D1. Thereby, the toilet TR and the bathroom BR are ventilated, and the bathroom BR is dried by blowing warm air into the bathroom BR by the heating unit 2.
In addition, in this ventilation apparatus 1, although it is not installed so that the dressing room DR can be ventilated, the ventilation duct is extended from the ceiling of the dressing room DR and connected to the ventilation box 10 in the same manner as the toilet TR, and is connected to the ventilation box DR. Ventilation may also be performed, and similarly, a ventilation duct may be extended to allow ventilation in other rooms. Furthermore, a clearance may be provided in the lower part of the door of the toilet TR or the like through the ventilation duct D2 so that the entire room can be ventilated through this clearance.

As shown in FIG. 2, the ventilator 1 includes a ventilation box 10 provided with a plurality of intake ports 52 to 56 that are arbitrarily used and a single exhaust port 51, and a ventilation fan accommodated in the ventilation box 10. 3 and a control panel 4 having air volume control means for variably controlling the air volume of the ventilation fan 3 according to a current value flowing through a fan motor (not shown).
The ventilation box 10 has a rectangular box shape with four side walls, and the exhaust port 51 is formed on one side of the first side wall 11 and the intake port 52 is adjacent to the exhaust port 51. One is formed. The second side wall 12 and the fourth side wall 14 adjacent to the first side wall 11 are respectively formed with one intake port 53 and 54, and the third side wall 13 facing the first side wall 11 has left and right sides. Two intake ports 55 and 56 are formed adjacent to each other.

  And the ventilation duct etc. are suitably connected to these several inlet ports 52-56 according to the floor plan of the house in which this ventilation apparatus 1 is installed. For example, in the case shown in FIG. 1, the air inlet 53 of the second side wall 12 serves as a communication port for the heating unit 2 attached to the second side wall 12 and sucks air in the bathroom BR through the heating unit 2. I am trying. Further, one air inlet 56 of the third side wall 13 is connected to a ventilation duct D2 leading to the toilet TR so as to suck air in the toilet TR through the ventilation duct D2. Note that the other intake ports, that is, the intake port 52 of the first side wall 11, the intake port 54 of the third side wall 13, and the intake port 55 to which the ventilation duct D2 of the fourth side wall 14 is not connected are all unused. (In the case shown in FIG. 2, the control panel 4 for controlling the ventilation fan 3 serves as the closing plate 6 in the intake port 54 of the fourth side wall 14. .)

Further, dampers 72 to 76 whose opening degrees are set are attached to the respective intake ports 52 to 56, and by adjusting the opening degrees of the intake ports 52 to 56 by the dampers 72 to 76, The amount of air to be sucked from is preset. In general, in a ventilator used as a bathroom heating / drying apparatus, the damper position (or angle) of each intake port is usually set so that the intake air amount from the bathroom is larger than the other intake ports. Therefore, also in the ventilation apparatus 1 by this Embodiment, the inlet 53 of the 2nd side wall 12 connected with the heating unit 2 rather than the suction | inhalation air volume in the inlet 56 of the 3rd side wall 13 connected with the ventilation duct D2 of toilet TR. The dampers 73 and 76 are positioned so that the amount of air sucked in is increased.
The heating unit 2 is supplied with hot water from a water heater (not shown) in the box 20 to heat the air in the bathroom BR, and the air in the bathroom BR is sucked in through the heat exchanger 21. And a circulation fan 22 for discharging to the bathroom BR.

  The ventilation device 1 controls the current value applied to the fan motor of the ventilation fan 3 by the air volume control means of the control panel 4 so that the air volume by the ventilation fan 3 is varied. Is based on one control standard for any inlet connection pattern. This is because the variation in the air volume between the inlet connection patterns is reduced by rectifying the air flow in the ventilation box 10 in a well-balanced manner by a wind shield 8 (wind shield) described later. In addition, by an operation from a remote controller (not shown), the air volume control means causes a low wind mode (low air volume ventilation) in which ventilation is performed for 24 hours in the ventilator, and a strong wind mode (high air volume) in which the bathroom BR and the toilet TR are forcibly ventilated for a certain period of time. It may be possible to switch to control such as (ventilation).

  Next, as shown in FIG. 3, the ventilation fan 3 has a circular fan casing 30 in which a sirocco fan 33 is accommodated. A circular fan inlet 32 is provided on the lower surface 30 </ b> B of the circular fan casing 30 and the side surface thereof is provided. It has the structure which provided the fan blower outlet 31 sideways. And in the area | region of the side containing the said fan blower outlet 31, when the bisector (one-dot chain line in FIG. 3) is drawn to the said circular fan casing 30 along the blowing direction of the said fan blower outlet 31, A plate-shaped wind shield 8 serving as a wind shield is provided at the corner of the lower surface 30B of the circular fan casing 30.

  As shown in FIG. 4, the fan outlet 31 of the ventilation fan 3 is connected to the exhaust port 51 of the ventilation box 10, and the upper surface 30 </ b> A of the ventilation fan 3 is attached to the ceiling surface 10 </ b> A of the ventilation box 10. On the other hand, a constant gap S is formed between the lower surface 30B of the ventilation fan 3 provided with the fan suction port 32 and the ventilation box bottom surface 10B (ventilation box constituting surface). It becomes the ventilation path R of the air sucked from. The wind shielding plate 8 is provided in the ventilation path R, and is set to a size such that a gap S1 is formed between the ventilation box 10 and the bottom surface 10B. In addition, the wind shield 8 is adjacent to the first side wall 11 and located on the second side wall 12 located on the side closer to the exhaust port 51, that is, the heating unit 2 is arranged in parallel. It is arranged between the position of the intake port 53 having a larger intake air volume than the intake port 56 and the fan intake port 32 of the ventilation fan 3.

As described above, according to the ventilation device 1 according to the present embodiment, the wind shielding plate 8 causes a rectifying action on the air flow in the air passage R formed by the gap S between the ventilation box 10 and the ventilation fan 3. As a result, air is smoothly sucked into the fan suction port 32 of the ventilation fan 3.
That is, in a specific intake port connection pattern, the amount of air sucked from a specific direction with respect to the circular fan intake port 32 of the ventilation fan 3 increases or decreases, and therefore the ventilation fan 3 is operated at the same rotational speed. However, it is considered that a specific air intake port connection pattern causes a difference in air volume and a large difference in air blowing performance. However, by providing the wind shielding plate 8, the air flow can be rectified in the ventilation path R in the ventilation box 10, and as a result, the circular fan inlet 32 of the ventilation fan 3 can be seen from the entire periphery. It is considered that the air flows almost uniformly and the air is smoothly sucked into the fan suction port 32.

  Thereby, the difference of the air resistance which flows through the ventilation path R between each inlet port connection pattern can be made small irrespective of the difference in inlet port connection pattern. That is, when the ventilation fan 3 is operated at the same rotation speed among the plurality of intake port connection patterns, both the intake port connection pattern having the largest air volume and the intake port connection pattern having the smallest air volume are used. The air volume difference can be reduced. Therefore, even if the air volume control means in the control panel 4 controls the air volume of the ventilation fan 3 based on one control standard, the variation in the air volume between the connection patterns can be reduced regardless of the intake port connection pattern.

  From the above, according to the ventilation device 1 according to the present embodiment, the air volume control means is based on one control standard (for example, a control table or a relational expression of “fan rotation speed-motor current value” correlation). Even if the air volume of the ventilation fan 3 is controlled, there is an effect that a stable air blowing performance can be obtained regardless of the inlet connection pattern. Moreover, since the air volume control means can cope with the air volume control of various intake port connection patterns only by having one control standard, there is an effect that the control configuration can be easily configured.

(Verification test)
Next, it will be explained that the following experimental results demonstrate that the air shielding plate 8 reduces the variation in air volume between the inlet connection patterns.
First, using the bathroom heating / drying apparatus of the type shown in the above embodiment, as the inlet connection pattern, the wind shielding plate 8 was provided in the six patterns shown in FIGS. 5 (1) to (6). The fan motor current value (rotation speed-current value) with respect to the fan rotation speed of the ventilation fan 3 and the air volume (rotation speed-air volume) with respect to the fan rotation speed were measured. The measurement results are shown in the graphs of Tables 1 to 4 and FIGS. The connection patterns A to C shown in FIGS. 5A to 5C are shown in Tables 1 and 2 and FIGS. 6 and 7. The connection patterns A ′ to C ′ shown in FIGS. 5 (4) to 5 (6) are shown in Tables 3 and 4 and FIGS. 8 and 9.

  As is clear from these measurement results, when the wind shielding plate 8 is not provided, there is a large difference in both the current value and the air volume between the connection pattern A and the connection pattern B (Table 2, FIG. 6). (B), FIG. 7 (B)), when the wind shielding plate 8 is provided, it can be seen that the difference in both the current value and the air volume between these connection patterns A and B is reduced (Table 1). FIG. 6 (A) and FIG. 7 (A)). This indicates that the air flow variation between the connection patterns A to C is reduced by providing the wind shielding plate 8 (FIGS. 7A and 7B).

On the other hand, in the connection patterns A ′ to C ′ shown in FIGS. 5 (4) to (6), both the current value and the air volume are large between the connection patterns A ′ to C ′ even when the wind shielding plate 8 is not provided. No disparity was observed (Table 4, FIG. 8 (B), FIG. 9 (B)), and even if the wind shield 8 was provided, both the current value and the air volume between the connection patterns A ′ to C ′ It was found that there was almost no difference from the case where the wind shielding plate 8 was not provided (Table 3, FIG. 8 (A), FIG. 9 (A)).
From the above, it is very effective to reduce the disparity between the connection patterns (the connection pattern A and the connection pattern B described above) that cause a large difference in the air volume and the current value by providing the wind shielding plate 8. In addition, it has been clarified that there is almost no influence on the connection patterns (the connection patterns A ′ to C ′ described above) in which there is no large difference in the air volume and the current value.

(Other)
In the above embodiment, the wind shielding plate 8 is provided on the fan casing 30 of the ventilation fan 3, but is provided on the ventilation box bottom surface 10 </ b> B (ventilation box constituting surface) and a predetermined space between the fan casing 30. You may set to the magnitude | size which forms the clearance gap S1.
Further, although the wind shielding plate 8 is provided at the corner portion of the fan casing 30, it may be provided at an arbitrary position on the lower surface 30B of the fan casing where the fan suction port 32 is provided.
Moreover, in the said embodiment, although it is set as the plate-shaped windshield 8, it may be anything if it is a windshield which becomes an object which gives resistance to an air current, such as a protrusion or a bulge.
Furthermore, in the said embodiment, although the ventilation apparatus 1 used for the bathroom heating drying apparatus which arranges the heating unit 2 side by side was mentioned, the simple ventilation apparatus 1 which does not arrange the heating unit 2 side by side may be sufficient, and an air purifier It can be used for all devices that require ventilation function, such as air conditioners such as air conditioners and air conditioners.
Furthermore, the ventilator of the present invention can be used for any space where ventilation is required, such as a space in a transport device such as a factory or a train, in addition to a ventilator in a house.

It is the perspective view which showed an example of the installation state of a ventilation apparatus. It is the top view which showed the internal structure of the ventilation apparatus by embodiment of this invention. It is the perspective view which looked at the ventilation fan from diagonally downward. It is the side view which looked at the internal structure in the ventilation box from the side. It is the schematic diagram which showed the various intake port connection patterns which carried out verification experiment. It is the graph which showed the correlation of the fan motor electric current value with respect to the fan rotation speed in the inlet port connection pattern AC shown to Fig.5 (1)-(3), and the same figure (A) provided the windshield. The case (B) shows the case where a windshield is not provided. It is the graph which showed the correlation of the air volume with respect to the fan rotation speed in the inlet port connection pattern AC shown to Fig.5 (1)-(3), and the same figure (A) shows the case where a windshield board is provided. FIG. 5B shows the case where no wind shield is provided. It is the graph which showed the correlation of the fan motor electric current value with respect to the fan rotation speed in the inlet port connection pattern A'-C 'shown to FIG.5 (4)-(6), and the same figure (A) shows a windshield. The case where it provided is shown and the figure (B) shows the case where a windshield is not provided. It is the graph which showed the correlation of the air volume with respect to the fan rotation speed in the inlet port connection pattern A'-C 'shown to FIG.5 (4)-(6), and the same figure (A) is a case where a wind-shielding board is provided. The figure (B) shows the case where a windshield is not provided.

Explanation of symbols

1 Ventilator 2 Heating unit 3 Ventilation fan 4 Control panel (air flow control means)
8 Wind shield (wind shield)
DESCRIPTION OF SYMBOLS 10 Ventilation box 11 1st side wall 12 2nd side wall 13 3rd side wall 14 4th side wall 30 Fan casing 31 Fan blowing port 32 Fan suction port 33 Sirocco fan 51 Exhaust port 52-56 Inlet port R Air passage

Claims (5)

A ventilation box provided with a plurality of arbitrarily used intake ports and a single exhaust port, a ventilation fan accommodated in the ventilation box, and an air flow by the ventilation fan are variably controlled by a current value flowing to the fan motor. In a ventilator equipped with an air volume control means,
A wind shield is provided in the air passage formed by the gap between the surface of the ventilation fan on the fan inlet side and the surface of the ventilation box.
The ventilating apparatus according to claim 1, wherein the air volume control means controls the air volume of the ventilation fan based on one control standard. The ventilator according to claim 1,
The ventilation fan has a circular fan casing containing a sirocco fan, a circular fan inlet is provided on one side of the upper and lower surfaces of the circular fan casing, and a fan outlet is provided sideways on the side surface.
The ventilator is provided in a region including the fan air outlet when a bisector is drawn on the circular fan casing along the air outlet direction of the fan air outlet. The ventilator according to claim 1 or 2,
The ventilation box has four side walls on which the intake port and the exhaust port are formed. The exhaust port is formed on one side of the first side wall, adjacent to the first side wall and facing each other. It is a configuration in which an intake port having a large intake air volume is provided on either the second side wall or the fourth side wall, which is larger than the other intake ports,
The ventilator is a ventilator provided between a position of an intake port on the second side wall located closer to an exhaust port on the first side wall and a fan intake port of the ventilation fan. The ventilator according to any one of claims 1 to 3,
The windshield body is a windshield plate made of a plate material provided on the fan casing of the ventilation fan, and the windshield plate is set to a size such that a gap is formed between the ventilation box constituent surfaces. apparatus. The ventilator according to any one of claims 1 to 4,
One of the air inlets of the ventilation box is a ventilator that is a communication port from a heating unit including a heat exchanger.

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